Procom WZL24MVA Ventless Propane Gas Log Set

VENT-FREE YELLOW FLAME GAS LOG

HEATER

WARNING: If the information in this manual is not

followed exactly, a re or explosion may result causing

property damage, personal injury or loss of life.

— Do not store or use gasoline or other ammable va-

pors and liquids in the vicinity of this or any other

appliance.

— WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.

• Do not touch any electrical switch; do not use any

phone in your building.

•

Immediately call your gas supplier from a neighbor’s

phone. Follow the gas supplier’s instructions.

• If you cannot reach your gas supplier, call the re

department.

—

Installation and service must be performed by a quali-

ed installer, service agency or the gas supplier.

INSTALLER: Leave this manual with the appliance.

CONSUMER: Retain this manual for future reference.

Questions, problems, missing parts? Before returning to your retailer, call

our customer service department at 1-866-573-0674, 7:30 am - 4:15 pm CST,

Monday through Friday or email customerservice@usaprocom.com

MODELS

WZ(N,L)18HLA

WZ(N,L)24HLA

WZ(N,L)18MVA

WZ(N,L)24MVA

WZ(N,L)30MVA

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200068-01A2

TABLE OF CONTENTS

Specications ............................................ 3

Safety ........................................................ 3

Product Features ....................................... 5

Local Codes............................................... 5

Unpacking.................................................. 5

Qualied Installing Agency ........................ 6

Water Vapor: A By-Product Of

Unvented Room Heaters ..................... 6

Air For Combustion and Ventilation ........... 6

Installation ................................................. 8

Operation ................................................. 19

Inspecting Burners................................... 23

Care And Maintenance ............................ 24

Troubleshooting ....................................... 25

Replacement Parts .................................. 29

Technical Services ................................... 29

Accessories ............................................. 29

Parts ........................................................ 30

Warranty .................................................. 36

This is an unvented gas-red heater. It uses air (oxygen)

from the room in which it is installed. Provisions for ad-

equate combustion and ventilation air must be provided.

Refer to Air for Combustion and Ventilation section on

page 6 of this manual.

WARNING: Improper installation, adjustment, al-

teration, service or maintenance can cause injury or

property damage. Refer to this manual for correct in-

stallation and operational procedures. For assistance

or additional information consult a qualied installer,

service agency or the gas supplier.

This appliance may be installed in an aftermarket,* per-

manently located, manufactured (mobile) home, where

not prohibited by local codes.

This appliance is only for use with propane or natural

gas. Field conversion by any other means including the

use of a kit is not permitted.

* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer.

SAVE THIS BOOK

IMPORTANT: Read this owner’s manual carefully and

completely before trying to assemble, operate, or ser-

vice this heater. Improper use of this heater can cause

serious injury or death from burns, re, explosion, elec-

trical shock and carbon monoxide poisoning. Failure to

follow these instructions will void the warranty.

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3200068-01A

Only a qualied installer, service

agent, or local gas supplier may

install and service this product.

WARNING: Keep the appli-

ance area clear and free from

combustible materials, gasoline,

and other ammable vapors and

liquids.

WARNING: This appliance

is equipped for use with natural

gas OR propane gas. Field con-

version is not permitted.

This appliance is only for use

with the type of gas indicated on

the rating plate. This appliance

is not convertible for use with

other gases.

DANGER: Carbon monoxide

poisoning may lead to death!

SPECIFICATIONS

SAFETY

Carbon Monoxide Poisoning: Early signs of

carbon monoxide poisoning resemble the u,

with headaches, dizziness or nausea. If you

have these signs, the heater may not be work-

ing properly. Get fresh air at once! Have heater

serviced. Some people are more affected by

carbon monoxide than others. These include

pregnant women, people with heart or lung

disease or anemia, those under the inuence

of alcohol and those at high altitudes.

Natural And Propane/LP Gas: Natural and

Propane/LP gas are odorless. An odor-making

agent is added to the gas. The odor helps you

detect a gas leak. However, the odor added to

the gas can fade. Gas may be present even

though no odor exists.

WARNING: Do not use a

blower insert, heat exchanger

insert or any accessory not ap-

proved for use with this log set.

WARNING: Do not allow fans

to blow directly into the heater.

Avoid any drafts that alter burner

ame pattern including ceiling

fans. Altered burner patterns

can cause sooting.

MODEL WZN18(HL,MV)A WZN24(HL,MV)A WZN30MVA

Ignition Piezo Ignitor Piezo Ignitor Piezo Ignitor

Gas Type Natural Natural Natural

Input Rating 32,000 BTU/Hr 34,000 BTU/Hr 40,000 BTU/Hr

Manifold Pressure 3" W.C. 3" W.C. 3" W.C.

Inlet Gas Pressure*

(inches of water)

Max. 10.5" W.C. Max. 10.5" W.C. Max. 10.5" W.C.

Min. 5" W.C. Min. 5" W.C. Min. 5" W.C.

MODEL WZL18(HL,MV)A WZL24(HL,MV)A WZL30MVA

Ignition Piezo Ignitor Piezo Ignitor Piezo Ignitor

Gas Type Propane/LP Propane/LP Propane/LP

Input Rating 32,000 BTU/Hr 34,000 BTU/Hr 40,000 BTU/Hr

Manifold Pressure 8" W.C. 8" W.C. 8" W.C.

Inlet Gas Pressure*

(inches of water)

Max. 14" W.C. Max. 14" W.C. Max. 14" W.C.

Min. 11" W.C. Min. 11" W.C. Min. 11" W.C.

* For purposes of input adjustment.

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200068-01A4

WARNING: Any change to

this heater or its controls can

be dangerous.

WARNING: Do not place

clothing or other flammable

material on or near the appli-

ance. Never place any objects

in the heater.

WARNING: Due to high tem-

peratures, the appliance should

be located out of trafc and away

from furniture and draperies.

WARNING: Heater becomes

very hot when running. Keep

children and adults away from

hot surfaces to avoid burns or

clothing ignition. Heater will re-

main hot for a time after shutoff.

Allow surfaces to cool before

touching.

WARNING: Carefully super-

vise young children when they

are in the room with the heater.

WARNING: Make sure a re-

place screen is in place before

running heater.

1. Do not place Propane/LP supply tank(s)

inside any structure. Propane/LP supply

tank(s) must be placed outdoors.

2. This heater should not be installed in a

bedroom or bathroom unless installed as

a vented appliance.

3. This heater needs fresh air ventilation to

run properly. This heater has an Oxygen

Depletion Sensing (ODS) safety shutoff

system. The ODS shuts down the heater

if not enough fresh air is available. See Air

for Combustion and Ventilation, page 6.

If heater keeps shutting off, see Trouble-

shooting, page 25.

4. Do not add extra logs or ornaments such

as pine cones, vermiculite, or rock wool.

Using these added items can cause soot-

SAFETY

ing. Do not add lava rock around base.

Rock and debris could fall into the control

area of heater. After servicing, always

replace screen before operating heater.

5. If replace has glass doors, never operate

this heater with glass doors closed. If you

operate heater with doors closed, heat will

build-up inside replace and cause glass

to burst. If replace opening has vents

at the bottom, you must open the vents

before operating log set. Always operate

heater with glass doors fully open.

6. This log heater is designed to be smoke-

less. If logs ever appear to be smoking,

turn off heater and call a qualied service

technician. NOTE: During initial operating,

slight smoking could occur due to log cur-

ing and heater burning off manufacturing

residues.

7. To prevent the creation of soot, follow the

instructions under Care and Maintenance

page 24.

8. Do not run heater:

• Where ammable liquids or vapors are

used or stored.

• Under dusty conditions.

9. Before using furniture polish, wax, carpet

cleaner, or similar products, turn heater

off. If heated, the vapors from these prod-

ucts may create a white powder residue

within burner box or on adjacent walls or

furniture.

10. Do not use heater if any part has been

under water. Immediately call a qualied

service technician to inspect the room

heater and to replace any part of the

control system and any gas control which

has been under water.

11. Turn off and let cool before servicing. Only

a qualied service person should service

and repair heater.

12. Operating heater above elevations of

4,500 feet could cause pilot outage.

13. Do not use this heater if any log is broken.

Do not operate heater if a log is chipped

(dime-size or larger).

14. To prevent performance problems, do

not use propane/LP fuel tank of less than

100 lbs. capacity.

15. Solid fuels should not be burned in

replace in which a vent-free log set is

installed. Do not use this heater to cook

food or burn paper or other objects.

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5200068-01A

PRODUCT FEATURES

This heater is clean burning. It requires no outside venting. There is no heat loss out of a

vent or up a chimney. Heat is generated by realistic, dancing yellow ames. This heater is

designed for vent-free operation with ue damper closed. It has been tested and approved to

ANSI Z21.11.2 standard for unvented heaters. State and local codes in some areas prohibit

the use of vent-free heaters.

Install and use heater with care. Follow all

local codes. In the absence of local codes,

use the latest edition of The National Fuel

Gas Code, ANSI Z223.1/NFPA 54*.

*Available from:

American National Standards Institute, Inc.

25 West 43rd Street

New York, NY 10036

National Fire Protection Association, Inc.

1 Batterymarch Park

Quincy, MA 02269-9101

LOCAL CODES

State of Massachusetts: The installation

must be made by a licensed plumber or

gas tter in the Commonwealth of Mas-

sachusetts.

Sellers of unvented propane or natural

gas-red supplemental room heaters shall

provide to each purchaser a copy of 527

CMR 30 upon sale of the unit.

In the State of Massachusetts the gas

cock must be a T-handle type. The State

of Massachusetts requires that a exible

appliance connector cannot exceed three

feet in length.

UNPACKING

CAUTION: Do not remove the

metal data plates from the burner

pan. The data plates contain

important product information.

1. Remove logs and burner base assembly

from carton. NOTE: Do not pick up burner

base assembly by burners as this could

damage heater. Always handle base as-

sembly by grate.

2. Remove all protective packaging applied

to logs and base for shipment.

3. Check all items for any shipping damage.

If damaged, promptly inform dealer where

you purchased the heater.

SAFETY PILOT

This heater has a pilot with an Oxygen Deple-

tion Sensing (ODS) safety shutoff system. The

ODS/pilot shuts off the heater if there is not

enough fresh air.

PIEZO IGNITION SYSTEM

This heater is equipped with a piezo ignitor.

This system requires no matches, batteries,

or other sources to light heater.

Figure 1 - Product Identication

(Logs May Vary by Model, HLA Base

Shown)

Ignitor

Control Knob

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200068-01A6

QUALIFIED INSTALLING AGENCY

Only a qualied agency should install and

replace gas piping, gas utilization equipment

or accessories, and repair and equipment ser-

vicing. The term “qualied agency” means any

individual, rm, corporation, or company that

either in person or through a representative

is engaged in and is responsible for:

a) Installing, testing, or replacing gas piping

or

b) Connecting, installing, testing, repairing,

or servicing equipment; that is experienced

in such work; that is familiar with all precau-

tions required; and that has complied with

all the requirement of the authority having

jurisdiction.

In areas that prohibit the use of vent-free

heaters, the log set has been tested and

approved to the ANSI Z21.60 standard for

Vented Decorative Logs. When used as a

vented log set refer to additional instructions

on page 11.

WATER VAPOR: A BY-PRODUCT OF

UNVENTED ROOM HEATERS

Water vapor is a by-product of gas combus-

tion. An unvented room heater produces ap-

proximately one (1) ounce (30 mL) of water

for every 1,000 BTUs (0.3 KWs) of gas input

per hour. Unvented room heaters are recom-

mended as supplemental heat (a room) rather

than a primary heat source (an entire house).

In most supplemental heat applications, the

water vapor does not create a problem. In

most applications, the water vapor enhances

the low humidity atmosphere experienced

during cold weather.

The following steps will help ensure that water

vapor does not become a problem.

1. Be sure the heater is sized properly for the

application, including ample combustion

air and circulation air.

2. If high humidity is experienced, a dehu-

midier may be used to help lower the

water vapor content of the air.

3. Do not use an unvented room heater as

the primary heat source.

AIR FOR COMBUSTION AND VENTILATION

WARNING: This heater shall

not be installed in a conned

space or unusually tight con-

struction unless provisions are

provided for adequate combus-

tion and ventilation air. Read the

following instructions to insure

proper fresh air for this and

other fuel-burning appliances

in your home.

Today’s homes are built more energy efcient

than ever. New materials, increased insulation

and new construction methods help reduce

heat loss in homes. Home owners weather

strip and caulk around windows and doors

to keep the cold air out and the warm air in.

During heating months, home owners want

their homes as airtight as possible.

While it is good to make your home energy

efcient, your home needs to breathe. Fresh

air must enter your home. All fuel-burning ap-

pliances need fresh air for proper combustion

and ventilation.

Exhaust fans, replaces, clothes dryers and

fuel burning appliances draw air from the

house to operate. You must provide adequate

fresh air for these appliances. This will insure

proper venting of vented fuel-burning appli-

ances.

WARNING: This heater

shall not be installed in a room

or space unless the required

volume of indoor combustion

air is provided by the method

described in the National Fuel

Gas Code, ANSI Z223.1/NFPA

54, the International Fuel Gas

Code, or applicable local codes.

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7200068-01A

AIR FOR COMBUSTION AND VENTILATION

WARNING: If the area in which

the heater may be operated does

not meet the required volume for

indoor combustion air, combus-

tion and ventilation air shall be

provided by one of the methods

described in the National Fuel

Gas Code, ANSI Z223.1/NFPA

54, the International Fuel Gas

Code, or applicable local codes.

VENTILATION AIR

Ventilation Air From Inside Building

This fresh air would come from an adjoining

unconned space. When ventilating to an

adjoining unconned space, you must provide

two permanent openings: one within 12" of the

ceiling and one within 12" of the oor on the

wall connecting the two spaces (see options

1 and 2, Figure 2). You can also remove door

into adjoining room (see option 3, Figure 2).

Follow the National Fuel Gas Code, ANSI

Z223.1/NFPA 54, Air for Combustion and

Ventilation for required size of ventilation

grills or ducts.

Ventilation Air From Outdoors

Provide extra fresh air by using ventilation

grills or ducts. You must provide two perma-

nent openings: one within 12" of the ceiling

and one within 12" of the oor. Connect these

items directly to the outdoors or spaces open

to the outdoors. These spaces include attics

and crawl spaces. Follow the National Fuel

Gas Code, ANSI Z223.1/NFPA 54, Air for

Combustion and Ventilation for required size

of ventilation grills or ducts.

IMPORTANT: Do not provide openings

for inlet or outlet air into attic if attic has a

thermostat-controlled power vent. Heated air

entering the attic will activate the power vent. If

an attic opening is unacceptable. Recongure

the conned space, by adding ventilation to

adjoining unconned space or removing doors

as indicated in Figure 2, Option 1 and 2. The

combined spaces must have enough fresh air

to supply all appliances in both spaces. Oth-

erwise a lower input model must be installed

that meets the room size requirements.

Outlet

Air

Ventilated

Attic

Outlet

Air

Inlet

Air

Inlet Air

Ventilated

Crawl Space

To

Crawl

Space

To Attic

Figure 2 - Ventilation Air from Inside

Building

Figure 3 - Ventilation Air from Outdoors

Or

Remove

Door into

Adjoining

Room,

Option

3

Ventilation Grills

Into Adjoining Room,

Option 2

Ventilation

Grills Into

Adjoining

Room,

Option 1

12"

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200068-01A8

INSTALLATION

NOTICE: This heater is intended

for use as supplemental heat.

Use this heater along with your

primary heating system. Do not

install this heater as your pri-

mary heat source. If you have a

central heating system, you may

run system’s circulating blower

while using heater. This will help

circulate the heat throughout the

house. In the event of a power

outage, you can use this heater

as your primary heat source.

WARNING: A qualied ser-

vice person must install heater.

Follow all local codes.

WARNING: Before installing

in a solid fuel burning replace,

the chimney ue and rebox

must be cleaned of soot, creo-

sote, ashes and loose paint by

a qualified chimney cleaner.

Creosote will ignite if highly

heated. A dirty chimney ue may

create and distribute soot within

the house. Inspect chimney ue

and rebox for damage. If dam-

aged, repair ue before operat-

ing heater.

WARNING: Seal any fresh

air vents or ash clean-out doors

located on oor or wall of re-

place. If not, drafting may cause

pilot outage or sooting. Use a

heat-resistant sealant. Do not

seal chimney ue damper.

WARNING: Never install the

heater

• in a bedroom or bathroom

• in a recreational vehicle

• where curtains, furniture, cloth-

ing, or other ammable objects

are less than 36" from the front,

42" from top, or 16" from sides

of the heater.

• in high trafc areas

• in windy or drafty areas

CAUTION: This heater cre-

ates warm air currents. These

currents move heat to wall sur-

faces next to heater. Installing

heater next to vinyl or cloth wall

coverings or operating heater

where impurities (such as to-

bacco smoke, aromatic candles,

cleaning uids, oil or kerosene

lamps, etc.) in the air exist, may

discolor walls or cause odors.

NOTICE: State or local codes

may only allow operation of this

appliance in a vented congura-

tion. Check your state or local

codes.

WARNING: This appliance is

designed for installation in only

a solid-fuel burning masonry or

UL 127 factory-built replace or

in a listed ventless rebox enclo-

sure. Exception: DO NOT install

this appliance in a factory-built

replace that includes instruc-

tions stating it has not been

tested or should not be used

with unvented gas logs.

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9200068-01A

Figure 4 - Minimum Clearance for

Combustible to Wall

INSTALLATION

IMPORTANT: Vent-free heaters add moisture

to the air. Although this is benecial, installing

heater in rooms without enough ventilation air

may cause mildew to form too much moisture.

See Air for Combustion and Ventilation, pages

6 and 7.

Before beginning assembly or operation of

the product, make sure all parts are pres-

ent. Compare parts with package contents

list. If any part is missing or damaged, do

not attempt to assemble, install or operate

the product. Contact customer service for

replacement parts.

Before installing heater, make sure you have

the items listed below:

• Hardware package (provided with heater)

• Electric drill with 3/16" drill bit

• Phillips screwdriver

CHECK GAS TYPE

Be sure your gas supply is right for your heat-

er. Otherwise, call dealer where you bought

the heater for proper type heater.

CLEARANCES TO

COMBUSTIBLES

WARNING: Maintain the mini-

mum clearances. If possible, pro-

vide greater clearances from oor,

ceiling, and adjoining wall. Measure

from outermost point of heater.

Minimum Fireplace Clearance To

Combustible Materials

Side Wall 16", Ceiling 42", Front 36"

LOG SIZING REQUIREMENTS

Minimum Firebox Size

18" Log Set: Height 20", Depth 14",

Front Width 29", Rear Width 23"

24" Log Set: Height 20.5", Depth 14",

Front Width 34", Rear Width 25.5"

30" Log Set: Height 20.5", Depth 14",

Front Width 39", Rear Width 31.5"

Minimum Clearances For Side

Combustible Material, Side Wall

and Ceiling

A. Clearance from the side of the replace

cabinet to any combustible material and

wall should follow diagram in Figure 4.

B. Clearance from the top of the replace

opening to the ceiling must not be less

than 42".

Minimum Noncombustible Material

Clearances

If Not Using Mantel

Note: If using a mantel, proceed to If Using

Mantel, page 10. If not using a mantel, follow

the information below.

You must have noncombustible material(s)

above the replace opening. Noncombustible

materials (such as slate, marble, tile, etc.)

must be at least 1/2" thick. With sheet metal,

you must have noncombustible material be-

hind it. Noncombustible material must extend

at least 12" up (for all models). See Figure 5

for minimum clearances.

*Minimum 16" from Side Wall

*

Figure 5 - Heat Resistant Material (Slate,

Marble, Tile, etc.) Above Fireplace

Noncombustible

Material Distance

Requirements for Safe Installation

(A) 12" or more: Noncombustible material okay.

(A) Between 8" and 12":

24" & 30" Models, install replace hood

accessory. 18" Models, noncombustible

material okay.

(A) Less than 8": Noncombustible

material must be extended to at least 8".

See Between 8" and 12", above. If you

cannot extend material, you must operate

heater with ue damper open.

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200068-01A10

NOTICE: This heater may be

used as a vented product. If so,

you must always operate log set

with chimney ue damper open.

If running log set with damper

open, noncombustible material

above replace opening is not

needed. Go to Installing Damper

Clamp Accessory for Vented

Operation, page 11.

If Using Mantel

You must have noncombustible material(s)

above the replace opening. Noncombustible

materials (such as slate, marble, tile, etc.)

must be at least 1/2" thick. With sheet metal,

INSTALLATION

Figure 6 - Minimum Mantel Clearances

Without Using Hood

Figure 7 - Minimum Mantel Clearances

When Using Hood

Minimum

Noncombustible

Material

Minimum

Noncombustible

Material Height

Distances to

Underside of

Mantel

Top of

Fireplace

Opening

Underside of

Mantel Shelf

8"

(A)

8" 14" 16" 20"

18" Log Set

12" 18" 20" 22" 24" 24" Log Set

All minimum

distances are

in inches

2

1

/

2

"

6"

8"

10"

Minimum

Noncombustible

Material

8"

Min.

12" 15" 18" 20"

2½"

6"

8"

10"

12"

Distances to

Underside of

Mantel

Hood

Top of

Fireplace

Opening

Underside

of Mantel

Shelf

Mantel Shelf

you must have noncombustible material be-

hind it. Noncombustible material must extend

at least 8" up. If noncombustible material is

less than 12", you must install the replace

hood accessory. Even if noncombustible

material is more than 12", you may need the

hood accessory to deect heat away from

your mantel shelf. See Figures 5, 6 and 7, for

minimum clearances.

MANTEL CLEARANCES

In addition to meeting noncombustible mate-

rial clearances, you must also meet required

clearances between replace opening and

mantel shelf. If you do not meet the clearances

listed below, you will need a hood.

Determining Minimum Mantel

Clearance

If you meet minimum clearance between

mantel shelf and top of replace opening, a

hood is not required (see Figure 6).

Determining Minimum Mantel

Clearance When Using a Hood

If minimum clearances in Figure 6 are not met,

you must have a hood. When using a hood

there are still certain minimum mantel clear-

ances required. Follow minimum clearances

shown in Figure 7, when using hood.

NOTICE: Surface temperatures

of adjacent walls and mantels

become hot during operation.

Walls and mantels above the

firebox may become hot to

the touch. If installed properly,

these temperatures meet the

requirement of the national

product standard. Follow all

minimum clearances shown in

this manual.

NOTICE: If your installation does

not meet the minimum clear-

ances shown, you must do one

of the following:

• operate the logs only with the

ue damper open

• raise the mantel to an accept-

able height

• move the mantel

30" Log Set

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11200068-01A

INSTALLATION

Figure 10 - Attaching Damper to Fireplace

Damper

Clamp

Hearth

5"

Min.

Combustible

Material

14"

Min.

Combustible

Material

Noncombustible Material

Figure 8 - Minimum Fireplace Clearances

If Installed at Floor Level

Figure 9 - Minimum Fireplace Clearances

Above Combustible Flooring

FLOOR CLEARANCES

INSTALLING DAMPER CLAMP ACCESSORY FOR VENTED

OPERATION

When used as a vented heater, appliance

must be installed only in a solid-fuel burning

replace with a working ue constructed of

noncombustible material. You may use this

heater as a vented product. There are three

reasons for operating your heater as a vented

model:

1. The replace does not meet the clearance

requirements for vent-free operation.

2. State or local codes do not permit vent-

free operation.

3. You prefer vented operation.

If reasons number 1 or 2 above apply, you

must permanently open chimney ue damper.

You must install the damper clamp accessory

(not provided). This will insure vented opera-

tion (see Figure 10). The damper clamp will

keep damper open. Installation instructions

are included with clamp accessory.

See chart below for the minimum permanent

ue opening you must provide. Attach damper

clamp so the minimum permanent opening will

be maintained at all times.

Chimney

Height

Minimum Permanent

Flue Opening

6' to 15' 39 sq inches

15' to 30' 29 sq inches

Area of Various Standard Round Flues

Diameter Area

5" 20 sq inches

6" 29 sq inches

7" 39 sq inches

8" 51 sq inches

A. If installing appliance on the oor level,

you must maintain the minimum distance

of 14" to combustibles (see Figure 8).

B. If combustible materials are less than 14"

to the replace, you must install appliance

at least 5" above the combustible ooring

(see Figure 9).

www.usaprocom.com

200068-01A12

INSTALLATION

Figure 11 - Attaching Heater Base to

Fireplace Floor

Masonry Screw

Mounting Bracket

2. Mark screw locations through holes in

mounting brackets (see Figure 11). If

installing in a brick-bottom replace, mark

screw locations in mortar joint of bricks.

3. Remove heater base from replace.

4. Drill holes at marked locations using 3/16"

drill bit.

5. Apply pipe joint sealant lightly to tting

threads. Connect approved exible gas

hose to gas regulator of heater (see Fig-

ure 11). Note: Never apply pipe sealant

to are tting threads. Hold gas regulator

with a wrench when connecting exible

gas hose.

6. Attach base assembly to replace oor

using two masonry screws provided in

hardware package (see Figure 11).

7. Connect to gas supply. See Connecting

To Gas Supply, page 13.

WARNING: You must secure

this heater to replace oor. If

not, heater will move when you

adjust controls. Moving heater

may cause a gas leak.

WARNING: If installing in a

sunken replace, special care

is needed. You must raise the

replace oor to allow access to

heater control panel. This will in-

sure adequate air ow and guard

against sooting and controls

being damaged. Raise replace

oor with noncombustible mate-

rial. Make sure material is secure.

CAUTION: Do not pick up

heater base assembly by burners.

This could damage heater. Only

handle base assembly by grates.

IMPORTANT: Make sure the heater burners

are level. If heater is not level, heater will not

work properly.

Installation Items Needed

• hardware package (provided with heater)

• electric drill with 3/16" masonry drill bit

1. Position heater base assembly in re-

place. Center base assembly left to right

and front to back inside replace.

INSTALLING HEATER BASE ASSEMBLY

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13200068-01A

INSTALLATION

CONNECTING TO GAS SUPPLY

CAUTION: For natural gas,

check your gas line pressure

before connecting heater to gas

line. Gas line pressure must be

no greater than 10.5" WC. If gas

line pressure is higher, heater

regulator damage could occur.

CAUTION: Avoid damage to

regulator. Hold gas regulator

with wrench when connecting

into gas piping and/or ttings.

CAUTION: Use pipe joint

sealant that is resistant to gas

(Propane/LP or Natural Gas).

Before installing heater, make sure you have

the items listed below:

• external regulator for propane/LP unit only

(supplied by installer)

• piping (check local codes)

• sealant (resistant to natural gas and pro-

pane/LP gas)

• equipment shutoff valve*

• test gauge connection*

• sediment trap

• tee joint

• pipe wrench

• exible gas hose (check local codes)

* A CSA design-certied equipment shutoff

valve with 1/8" NPT tap is an acceptable al-

ternative to test gauge connection. Purchase

the optional CSA design certied equipment

shutoff valve from your dealer.

WARNING: A qualied ser-

vice technician must connect

heater to gas supply. Follow all

local codes.

WARNING: This appliance

requires a 1/2" NPT (National

Pipe Thread) inlet connection to

the pressure regulator.

WARNING: Do not over-

tighten gas connections.

WARNING: For natural gas,

Never connect heater to private

(non-utility) gas wells. This gas is

commonly known as wellhead gas.

CAUTION: For propane/LP gas,

never connect heater directly to the

gas supply. This heater requires

an external regulator (not sup-

plied). Install the external regulator

between the heater and propane/

LP supply. Gas supplier provides

external regulator for natural gas.

The installer provides the external

regulator for propane/LP gas.

CAUTION: Use only new,

black iron or steel pipe. Inter-

nally tinned copper tubing may

be used in certain areas. Check

your local codes. Use pipe of

1/2" diameter or greater to allow

proper gas volume to heater. If

pipe is too small, undue loss of

pressure will occur.

www.usaprocom.com

200068-01A14

INSTALLATION

Figure 13 - Gas Connection

Figure 12 - Attaching Flexible Gas Hose

to Heater Gas Regulator

Typical Inlet Pipe Diameters

Use 1/2" black iron pipe or greater. Installa-

tion must include an equipment shutoff valve,

union, and plugged 1/8" NPT tap. Locate

NPT tap within reach for test gauge hook up.

NPT tap must be upstream from heater (see

Figure 13).

IMPORTANT: Install an equipment shutoff

valve in an accessible location. The equip-

ment shutoff valve is for turning on or shutting

off the gas to the appliance.

For propane/LP installations, apply pipe

joint sealant lightly to male threads. This will

prevent excess sealant from going into pipe.

Excess sealant in pipe could result in clogged

heater valves.

The installer must supply an external regula-

tor. The external regulator will reduce incom-

ing gas pressure. You must reduce incoming

gas pressure to between 11" WC and 14" WC.

If you do not reduce incoming gas pressure,

heater regulator damage could occur. Install

external regulator with the vent pointing down

as shown in Figure 14. Pointing the vent down

protects it from freezing rain or sleet.

Figure 14 - External Regulator

with Vent Pointing Down

External

Regulator with

Vent Pointing

Down

Propane/LP

Supply Tank

Approved Flexible Gas Hose

(if allowed by local codes)

CSA Design-Certied

Equipment Shutoff Valve

With 1/8" NPT Tap*

Flexible Gas Hose (if

allowed by local codes)

Fitting

Heater Gas

Regulator

Sediment Trap

Cap Pipe Tee

Nipple Joint

3" Minimum

Install sediment trap in supply line as shown

in Figure 13. Place sediment trap where it is

within reach for cleaning. Place sediment trap

where trapped matter is not likely to freeze.

A sediment trap traps moisture and contami-

nants. This keeps them from going into heater

controls. If sediment trap is not installed or is

installed wrong, heater may not run properly.

WARNING: Test all gas piping

and connections for leaks after

installing or servicing. Correct

all leaks at once (see page 15).

Natural Gas

From Gas Meter

(5" W.C.** to 10.5"

W.C. Pressure)

Propane/LP

From External

Regulator

(11" W.C.** to 14" W.C.

Pressure)

* Purchase the optional CSA design-certied equipment

shutoff valve from your dealer.

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15200068-01A

INSTALLATION

Figure 15 - Equipment Shutoff Valve

CHECKING GAS CONNECTIONS

Open

Closed

Equipment

Shutoff Valve

3. Check all joints from gas meter to equip-

ment shutoff valve for natural gas or

propane/LP supply to equipment shutoff

valve for propane/LP (see Figure 16 or 17).

Apply a noncorrosive leak detection uid

to all joints. Bubbles forming show a leak.

4. Correct all leaks at once.

PRESSURE TESTING HEATER GAS

CONNECTIONS

1. Open equipment shutoff valve (see Fig-

ure 15).

2. Open main gas valve located on or near

gas meter for natural gas or open pro-

pane/LP supply tank valve.

3. Make sure control knob of heater is in the

OFF position.

4. Check all joints from equipment shutoff

valve to control valve (see Figure 16 or 17).

Apply a noncorrosive leak detection uid

to all joints. Bubbles forming show a leak.

5. Correct all leaks at once.

6. Light heater (see Lighting Instructions on

page 20 or 21). Check all other internal

joints for leaks.

7. Turn off heater (see To Turn Off Gas Ap-

pliance, page 21 or 22).

Control Valve

Location

Control Valve

Location

Equipment

Shutoff Valve

Equipment Shutoff Valve

External Regulator

Propane/LP

Supply Tank

Figure 16 - Checking Gas Joints for

Propane/LP Gas

Figure 17 - Checking Gas Joints for

Natural Gas

Gas Meter

WARNING: Test all gas piping

and connections, internal and

external to unit, for leaks after

installing or servicing. Correct

all leaks at once.

WARNING: Never use an open

ame to check .for a leak. Apply a

noncorrosive leak detection uid

to all joints. If bubbles form, there

is a leak. Correct all leaks at once.

PRESSURE TESTING GAS SUPPLY

PIPING SYSTEM

Test Pressures In Excess Of 1/2 PSIG (3.5 kPa)

1. Disconnect heater with its appliance main

gas valve (control valve) and equipment

shutoff valve from gas supply piping sys-

tem. Pressures in excess of 1/2 PSIG will

damage heater regulator.

2. Cap off open end of gas pipe where equip-

ment shutoff valve was connected.

3. Pressurize supply piping system by either

opening propane/LP supply tank valve

for propane/LP gas or opening main gas

valve located on or near gas meter for

natural gas or using compressed air.

4. Check all joints of gas supply piping sys-

tem. Apply noncorrosive leak detection

uid to all joints. If bubbles form, there

may be a leak.

5. Correct all leaks at once.

6. Reconnect heater and equipment shutoff

valve to gas supply. Check reconnected

ttings for leaks.

Test Pressures Equal To or Less

Than 1/2 PSIG (3.5 kPa)

1. Close equipment shutoff valve (see Fig-

ure 15).

2. Pressurize supply piping system by either

opening propane/LP supply tank valve

for propane/LP gas or opening main gas

valve located on or near gas meter for

natural gas or using compressed air.

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200068-01A16

INSTALLATION

Figure 18 - Wiring Diagram

ELECTRICAL WIRING (MILLIVOLT)

CAUTION: Label all wires prior to disconnection when servicing

controls. Wiring errors can cause improper and dangerous opera-

tion. Verify proper operation after servicing.

Note: The millivolt valve is a self-powered combination gas control that does not require

110 VAC to operate.

CONNECTING REMOTE RECEIVER

MODELS WZ(N,L)(18,24,30)MVA ONLY

Models WZ(N,L)(18,24,30)MVA can be connected to an aftermarket hand held remote receiver

(not supplied by ProCom Heating, Inc.)

Refer to the remote receiver manufacturer's installation Instructions and the Wiring Diagram

shown in Figure 18 for proper connection and use.

OPTIONAL POSITIONING OF THERMOSTAT SENSING BULB

For masonry and factory-built metal replace

Optional Wall Switch

or Remote Receiver

If your log set cycles to pilot, but the room

temperature drops to a lower than ideal

comfort level before the log set comes back

on, you may want to reposition the thermostat

sensing bulb.

The thermostat sensing bulb is located near

the gas valve assembly on the mounting

bracket. This location allows the thermostat

to keep the room temperature at an ideal

comfort level for most replace applications.

For positioning the thermostat sensing bulb

elsewhere, a mounting clip is available.

Tools needed: 1/4" hex driver or socket.

1. Remove logs. Locate the gas valve as-

sembly and thermostat sensing bulb.

Red

White

Switch

Black

Green

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17200068-01A

INSTALLATION

Figure 19 -Adhesive-Backed Mounting

Clip

Figure 20 - Removing Thermostat

Sensing Bulb

Figure 22 - Installing Thermostat

Sensing In Factory-Built Metal Fireplace

Figure 21 - Installing Thermostat Sensing

Bulb on Masonry Fireplace

Figure 23 - Installing Thermostat Sensing

Bulb behind Glass Door

Figure 24 – Position the Thermostat

Sensing Bulb in the Vertical Position

With Capillary at the Bottom

2. Remove the thermostat sensing bulb out

of the plastic clip (see Figure 22).

IMPORTANT: Do not force or bend the ther-

mostat sensing bulb or capillary.

3. The thermostat sensing bulb may be locat-

ed to the lower right front side of replace.

Determine location of sensing bulb, but

do not mount sensing bulb until step 5. If

you have a masonry replace, (see Figure

21 for location). If you have a factory-built

metal replace, see Figure 20 for location.

If your replace has glass doors, position

sensing bulb directly behind door gap on

right bottom side (see Figure 23).

4. The mounting clip must be a minimum

of 3" from bottom of replace to prevent

crimping of capillary. Once you have de-

cided on a location, thoroughly clean the

area. Remove the paper backing from the

adhesive on back of mounting clip (pro-

vided with the heater in hardware pack-

age) (see Figure 19). Press the clip into

the new location so that the thermostat

sensing bulb will be positioned vertically

with the capillary at the bottom (see Figure

24). Slide the thermostat sensing bulb into

the clip.

Thermostat

Sensing Bulb

Adhesive-Backed

Mounting Clip

Thermostat

Sensing Bulb

Thermostat

Sensing Bulb

Adhesive-Backed

Mounting Clip

Adhesive-Backed

Mounting Clip

Capillary

Thermostat

Sensing Bulb

Adhesive-Backed

Mounting Clip

Do Not Crimp

Capillary

Glass Doors

Plastic Clip

Gas Valve

Assembly

Thermostat

Sensing Bulb

Mounting

Bracket

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200068-01A18

INSTALLATION

INSTALLING LOGS

WARNING: Failure to posi-

tion the parts in accordance

with these diagrams or failure

to use only parts specically

approved with this heater may

result in property damage or

personal injury.

CAUTION: After installation

and periodically thereafter,

check to ensure that no yellow

ame comes in contact with any

log. With the heater set to High,

check to see if yellow ames

contact any log. If so, reposi-

tion logs according to the log

installation instructions in this

manual. Yellow ames contact-

ing logs will create soot.

Figure 26 - Installing Logs #1, #2, #3 and #4

(WZL30MVA Shown)

Figure 25 - Log Base (WZL30MVA Shown)

It is very important to install the logs exactly

as instructed. Do not modify logs. Use only

logs supplied with heater.

Each log is marked with a number. This

number will help you to identify the logs when

installing.

After installing logs, add decorative cinders

around the grate base, do not place any

decorative cinders on logs or burner.

1. Insert pins on the back of log #1 into the

slots on the rear log bracket on the back

of the grate base (see Figure 26).

2. Insert pins on the back of log #2 into the

slots on the left side of the middle log

bracket (see Figure 26).

3.

Insert pins on the back of log #3 into the

slots on the right side of the middle log

bracket (see Figure 26).

4.

Insert pins on the back of log #4 into

the slots on the left side of the front log

bracket (see Figure 26).

Log #1

Log #2

Log #3

Rear Log Bracket

Middle Log Bracket

Front Log Bracket

Log #4

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19200068-01A

OPERATION

WARNING: If you do not fol-

low these instructions exactly,

a re or explosion may result

causing property damage, per-

sonal injury or loss of life.

A. This appliance has a pilot which must

be lighted by hand. When lighting the

pilot, follow these instructions exactly.

B. BEFORE LIGHTING smell all around

the appliance area for gas. Be sure to

smell next to the oor because some

gas is heavier than air and will settle

on the oor.

WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.

• Do not touch any electric switch; do

not use any phone in your building.

• Immediately call your gas supplier

from a neighbor’s phone. Follow the

gas supplier’s instructions.

• If you cannot reach your gas supplier,

call the re department.

C. Use only your hand to push in or turn

the gas control knob. Never use tools.

If the knob will not push in or turn

by hand, don’t try to repair it, call a

qualied service technician. Force or

attempted repair may result in a re or

explosion.

D. Do not use this appliance if any part

has been under water. Immediately call

a qualied service technician to inspect

the appliance and to replace any part of

the control system and any gas control

which has been under water.

FOR YOUR SAFETY READ BEFORE LIGHTING

Avoid any drafts that alter burner ame

patterns. Do not allow fans to blow directly

into the replace. Do not place a blower inside

the burn area of the rebox. Ceiling fans may

create drafts that alter ame patterns. Sooting

and improper burning will result.

During manufacturing, fabricating and ship-

ping, various components of this appliance

are treated with certain oils, lms or bonding

agents. These chemicals are not harmful but

may produce annoying smoke and smells as

they are burned off during the initial operation

of the appliance, possibly causing headaches

or eye or lung irritation. This is a normal and

temporary occurrence.

The initial break-in operation should last four

to six hours with the burner at the highest

setting. Provide maximum ventilation by

opening windows or doors to allow odors to

dissipate. Any odors remaining after this initial

break-in will be slight and will disappear with

continued use.

This appliance must not be used with glass

doors in the closed position. This can lead

to pilot outages and severe sooting outside

the replace.

Always operate heater with glass doors fully

open.

INSTALLATION

5. Place log #5 on the top of log #1 and log

#2, inserting pin in log #1 into the hole in

the bottom of log #5 (see Figure 27).

6. Place log #6 on the top of log #1 and log

#3, inserting pin in log #1 into the hole in

the bottom of log #6. Be sure the opposite

end of log #6 aligns with the recess in log

#3 (see Figure 27).

7. Add lava rocks around the grate base of

heater. Do not place any lava rocks on

logs or burner.

Log #5

Log #6

Figure 27 - Installing Logs #5 and #6

(WZL30MVA Shown)

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200068-01A20

WARNING: You must oper-

ate this heater with the screen

in place. Make sure screen is

installed before running heater.

NOTICE: During initial operation

of new heater, burning logs will

give off a paper-burning smell.

Orange ame will also be pres-

ent. Open damper or window to

vent smell. This will only last a

few hours.

1. STOP! Read the safety information,

page 19.

2. Make sure equipment shutoff valve is fully

open.

3. This gas log set is equipped with an igni-

tion device (piezo) which automatically

lights the pilot. If the piezo ignitor does

not light the pilot, see Manual Lighting

Procedure, page 21.

4. Turn control knob clockwise to the

OFF position. Set the ame control to the

lowest setting.

5. Wait ve (5) minutes to clear out any gas.

Then smell for gas around heater and near

the oor. If you smell gas, STOP! Follow

"B" in the safety information, page 19. If

you do not smell gas, go to the next step.

6. From the OFF position, turn the control

knob counterclockwise

to the IGN

position. Press in control knob for ve (5)

seconds.

Note: The rst time that the heater is

operated after connecting the gas supply,

the control knob should be pressed for

about thirty (30) seconds. This will allow

air to bleed from the gas system. If pilot

does not stay lit, refer to Troubleshooting,

pages 25 though 28. Also contact a quali-

ed service technician or gas supplier for

repairs. Until repairs are made, light pilot

with match.

• If control knob does not pop up when

released, contact a qualified service

technician or gas supplier for repairs.

7. With control knob pressed in, push

down and release ignitor button. This

will light pilot. The pilot is attached to

the rear of the burner. If needed, keep

pressing ignitor button until pilot lights.

Note: If pilot does not stay lit, refer to

Troubleshooting, pages 25 though 28.

Also contact a qualied service technician

or gas supplier for repairs. Until repairs

are made, light pilot with match. To light

pilot with match, see Manual Lighting

Procedure, page 21.

8. Keep control knob pressed in for 60 sec-

onds to prevent the ame detector from

shutting off the gas while the probe is

warming up. The exciter ring on the pilot

tube must glow red before the burners can

be lit. After 60 seconds, release control

knob.

Note: If pilot goes out, repeat steps 4

through 8. Wait one (1) minute before

lighting pilot again.

9. Turn control knob counterclockwise

to the ON position. The main burner

should light.

Note: Please wait one minute after shut-

ting off heater to allow the control valve

to reset before starting again.

10. After the pilot has been lit for one minute,

the burners can be turned on. Turn the

ON/OFF switch to the ON position or ad-

just the thermostat to the desired setting.

MILLIVOLT CONTROL MODELS (MVA)

LIGHTING INSTRUCTIONS

OPERATION

Ignitor

Button

Manual/

Remote

Switch

Control

Knob

Flame

Control

Knob

Figure 28 - Ignitor Button and Control

Knob Locations

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21200068-01A

11. If the gas logs will not operate, see To Turn

Off Gas to Appliance and call our technical

service department at 1-866-573-0674.

CAUTION: Do not try to ad-

just heating levels by using the

equipment shutoff valve.

WARNING: Wait 30 seconds

before readjusting the heater

when the control knob has been

turned down to a lower setting.

OPERATION

Shutting Off Heater

1. Turn control knob clockwise to the OFF position.

2. Close equipment shutoff valve.

1. Follow steps 1 through 6 under Lighting

Instructions, page 20.

2. With control knob pressed in, strike a

match, and hold near pilot. Pilot should

light.

3. Keep control knob pressed in for 30 sec-

onds after lighting pilot. After 30 seconds,

release control knob.

4. Make sure the heater screen is in place

before operating heater.

TO TURN OFF GAS TO APPLIANCE

MANUAL LIGHTING PROCEDURE

Figure 29 - Pilot Assembly (MVA model)

Ignitor

Electrode

Thermopile

Thermocouple

Pilot Tube

WARNING: You must oper-

ate this heater with the screen

in place. Make sure screen is

installed before running heater.

NOTICE: During initial operation

of new heater, burning logs will

give off a paper-burning smell.

Orange ame will also be pres-

ent. Open damper or window to

vent smell. This will only last a

few hours.

1. STOP! Read the safety information,

page 19.

2. Make sure equipment shutoff valve is fully

open.

3. Push in control knob slightly and turn

clockwise

to the OFF position.

4. Wait ve (5) minutes to clear out any gas.

Then smell for gas around heater and near

the oor. If you smell gas, STOP! Follow

"B" in the safety information, page 19. If

you do not smell gas, go to the next step.

5. Push in and turn the control knob coun-

terclockwise to the PILOT position.

Press in control knob for ve (5) seconds.

Note: The rst time that the heater is

operated after connecting the gas supply,

the control knob should be pressed for

about thirty (30) seconds. This will allow

air to bleed from the gas system. If pilot

does not stay lit, refer to Troubleshooting,

pages 25 though 28. Also contact a quali-

ed service technician or gas supplier for

repairs. Until repairs are made, light pilot

with match.

• If control knob does not pop up when

released, contact a qualified service

technician or gas supplier for repairs.

MANUAL CONTROL MODELS (HLA)

LIGHTING INSTRUCTIONS

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200068-01A22

OPERATION

6. With control knob pressed in, push

down and release ignitor button. This

will light pilot. The pilot is attached to

the rear of the burner. If needed, keep

pressing ignitor button until pilot lights.

Note: If pilot does not stay lit, refer to

Troubleshooting, pages 25 though 28.

Also contact a qualied service technician

or gas supplier for repairs. Until repairs

are made, light pilot with match. To light

pilot with match, see Manual Lighting

Procedure.

7. Keep control knob pressed in for 10 sec-

onds after lighting pilot.

Note: If pilot goes out, repeat steps 5

through 7. Wait one (1) minute before

lighting pilot again.

9. To select the desired heating level, slightly

press the control knob and turn counter-

clockwise

. Release the downward

pressure on the knob while continuing to

turn until the knob locks at the desired

setting. Do not operate between locked

positions.

Shutting Off Heater

Turn control knob clockwise

to the

OFF position.

1. Follow steps 1 through 5 under Lighting

Instructions, page 21.

2. With control knob pressed in, strike a

match, and hold near pilot. Pilot should

light.

3. Keep control knob pressed in for 30 sec-

onds after lighting pilot. After 30 seconds,

release control knob.

4. Make sure the heater screen is in place

before operating heater.

TO TURN OFF GAS TO APPLIANCE

Shutting Off Burner Only (pilot

stays lit)

Turn control knob clockwise

to the

PILOT position.

MANUAL LIGHTING PROCEDURE

Note: Please wait one minute after shut-

ting off heater to allow the control valve

to reset before starting again.

10. If the gas logs will not operate, see To Turn

Off Gas to Appliance and call our technical

service department at 1-866-573-0674.

CAUTION: Do not try to ad-

just heating levels by using the

equipment shutoff valve.

Figure 30 - Pilot Assembly HLA Models

Ignitor

Electrode

Thermocouple

Pilot Air Inlet Hole

Pilot Burner

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23200068-01A

INSPECTING BURNERS

IMPORTANT: Owner’s should check pilot ame pattern and burner ame pattern often.

Incorrect ame patterns indicate the need for cleaning (see Care and Maintenance,

page 24) or service.

WARNING: Only a qualied service person should service and

repair heater. This includes maintenance requiring replacement or

alteration of components.

PILOT FLAME PATTERN

Figure 31 shows a correct pilot ame pattern.

Figure 32 shows an incorrect pilot ame pat-

tern. The incorrect pilot ame is not touching

the thermocouple. This will cause the ther-

mocouple to cool, which shuts the heater off.

If pilot ame pattern is incorrect, as shown

in Figure 32

• turn heater off (see To Turn Off Gas to Ap-

pliance, page 21 or 22)

• see Troubleshooting pages 25 through 28.

WARNING: If yellow tipping

occurs, your heater could pro-

duce increased levels of carbon

monoxide. If the burner ame

pattern shows yellow tipping,

follow instructions at bottom of

this page.

Notice: Do not mistake orange ames with

yellow tipping. Dirt or other ne particles enter

the heater and burn causing brief patches of

orange ame.

Approx. 3"-6" Above Top of Logs

More Than 8" Above Top of Logs

Figure 33 - Correct Burner Flame Pattern

Figure 34 - Incorrect Burner Flame

Pattern

BURNER FLAME PATTERN

Figure 33 shows a correct burner ame pattern. Figure 34 shows an incorrect burner ame

pattern. If burner ame pattern is incorrect then:

• turn heater off (see To Turn Off Gas to Appliance, page 21 or 22).

• see Troubleshooting pages 25 through 28.

BURNER PRIMARY AIR HOLES

Air is drawn into the burner through the holes in the tting at the entrance to the burner. These

holes may become blocked with dust or lint. Periodically inspect these holes for any blockage

and clean as necessary. Blocked air holes will create soot.

Figure 31 - Correct Pilot Flame Pattern

HLA Model Shown

Figure 32 - Incorrect Pilot Flame Pattern

Thermocouple

Pilot Burner

www.usaprocom.com

200068-01A24

Use a vacuum cleaner, pressurized air, or a

small, soft bristled brush to clean.

A yellow tip on the pilot ame indicates dust

and dirt in the pilot assembly. There is a small

pilot air inlet hole about 2" from where the

pilot ame comes out of the pilot assembly

(see Figure 36). With the unit off, lightly blow

air through the air inlet hole. You may blow

through a drinking straw if compressed air is

not available.

Figure 36 - Pilot Inlet Air Hole (HLA Shown)

LOGS

ODS/PILOT

• If you remove logs for cleaning, refer to Install-

ing Logs, page 18, to properly replace logs.

• Replace log(s) if broken or chipped (dime-

size or larger).

Figure 35 - Burner Tube

Burner

Tube

Primary Air Inlet Hole

BURNER INJECTOR HOLDER AND PILOT AIR INLET HOLE

We recommend that you clean the unit ev-

ery 2,500 hours of operation or every three

months. We also recommend that you keep

the burner tube and pilot assembly clean

and free of dust and dirt. To clean these

parts we recommend using compressed air

no greater than 30 PSl. Your local computer

store, hardware store, or home center may

carry compressed air in a can. You can use

a vacuum cleaner in the blow position. If us-

ing compressed air in a can, please follow

the directions on the can. If you don’t follow

directions on the can, you could damage the

pilot assembly.

1. Shut off the unit, including the pilot. Allow

the unit to cool for at least thirty minutes.

2. Inspect burner, pilot and primary air inlet

holes on injector for dust and dirt (see

Figure 35).

3. Blow air through the ports/slots and holes

in the burner. Also clean the pilot assembly.

4. Check the injector holder located at the

end of the burner tube again. Remove any

large particles of dust, dirt, lint, or pet hair

with a soft cloth or vacuum cleaner nozzle.

5. Blow air into the primary air holes on the

injector holder.

6. In case any large clumps of dust have

now been pushed into the burner. Repeat

steps 3 and 4.

CARE AND MAINTENANCE

WARNING: Turn off heater and let cool before servicing.

CAUTION: You must keep control areas, burner, and circulating

air passageways of heater clean. Inspect these areas of heater before

each use. Have heater inspected yearly by a qualied service techni-

cian. Heater may need more frequent cleaning due to excessive lint

from carpeting, bedding material, pet hair, etc.

WARNING: Failure to keep the primary air opening(s) of the

burner(s) clean may result in sooting and property damage.

MAIN BURNER

Periodically inspect all burner ame holes with

the heater running. All slotted burner ame

holes should be open with yellow ame pres-

ent. All round burner ame holes should be

open with a small blue ame present. Some

burner ame holes may become blocked by

debris or rust, with no ame present. If so,

turn off the heater and let it cool, and remove

blockage. Blocked burner ame holes will

create soot.

Ignitor

Electrode

Thermocouple

Pilot Air Inlet Hole

Pilot Burner

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25200068-01A

TROUBLESHOOTING

WARNING: If you smell gas:

• Shut off gas supply.

• Do not try to light any appliance.

• Do not touch any electrical switch; do not use any phone in your

building.

• Immediately call your gas supplier from a neighbor’s phone. Fol-

low the gas supplier’s instructions.

• If you cannot reach your gas supplier, call the re department.

WARNING: Only a qualied service technician should service and

repair heater. Make sure that power is turned off before proceeding.

Turn off and let cool before servicing.

CAUTION: Never use a wire, needle, or similar object to clean

ODS/pilot. This can damage ODS/ pilot unit.

IMPORTANT: Operating heater where impurities in air exist may create odors. Cleaning sup-

plies, paint, paint remover, cigarette smoke, cements and glues, new carpet or textiles, etc.,

create fumes. These fumes may mix with combustion air and create odors.

Note: All troubleshooting items are listed in order of operation.

CHECKING SYSTEM OPERATION

The millivolt system and individual compo-

nents may be checked with a millivolt meter

having a 0-1000 mV range. Conduct each

check shown in chart below by connecting

meter test leads to terminals as indicated.

A. Complete Millivolt System Check

(“A” Reading - Thermostat contacts

CLOSED - Control Knob “ON” - Main

burner should come ON)

a. If the reading is more than 100 millivolts

and the automatic valve still does not

come on, replace the control.

b. If the closed circuit reading (“A” reading) is

less than 100 millivolts, determine cause

for low reading, proceed to Section B

below.

B. Thermopile Output Reading

Check

(“B” Reading - Thermostat contacts OPEN-

Main burner OFF)

1. Check gas pressure to the unit. If gas

pressure is within minimum and maximum

on data plate, then check pilot voltage,

325 millivolts minimum. If the minimum

millivolt reading is not obtainable, replace

pilot.

Check Test A B

To Test Complete

System

Thermopile

Output

Connect Meter

Leads to

Terminals

2 & 3 1 & 2

Thermostat

Contacts

Closed Open

Meter Reading

Should Be

Closed Open

www.usaprocom.com

200068-01A26

TROUBLESHOOTING

Problem Possible Cause Corrective Action

When ignitor button is

pressed in, there is no

spark at ODS/pilot.

1. Ignitor electrode is posi-

tioned wrong. Ignitor elec-

trode is broken.

2. Ignitor electrode is not con-

nected to ignitor cable.

3. Ignitor cable is pinched or

wet.

4 Broken ignitor cable.

5. Bad piezo ignitor.

6. Piezo ignitor nut is loose.

1. Replace electrode.

2. Replace ignitor cable.

3. Free ignitor cable if pinched

by any metal or tubing. Keep

ignitor cable dry.

4. Replace ignitor cable.

5. Replace piezo ignitor.

6. Tighten nut holding piezo

ignitor to base panel of log

set. Nut is located behind

base panel.

When ignitor button is

pressed in there is a

spark at ODS/pilot but

no ignition.

1. Gas supply is turned off or

equipment shutoff valve is

closed.

2. Control knob not fully

pressed in while pressing

ignitor button.

3. Air in gas lines (new instal-

lation or recent gas interrup-

tion).

4. ODS / pilot is clogged.

5. Control knob not in PILOT

position.

6. Depleted gas supply (pro-

pane).

1. Turn on gas supply or open

equipment shutoff valve.

2. Fully press in control knob

while pressing ignitor button.

3. Continue holding down con-

trol knob. Repeat igniting op-

eration until air is removed.

4.

Clean ODS/pilot (see Care

and Maintenance, page 24) or

replace ODS/pilot assembly.

5. Turn control knob to PILOT

position.

6. Contact local propane/LP

gas company.

ODS/pilot lights but ame

goes out when control

knob is released.

1. Control knob is not fully

pressed in.

2. Control knob is not pressed

in long enough.

3. Equipment shutoff valve is

not fully open.

4. Thermocouple connection is

loose at control valve.

5. Pilot flame not touching

thermocouple, which allows

thermocouple to cool, caus-

ing pilot ame to go out. This

problem could be caused by

one or both of the following:

A) Low gas pressure

B) Dirty or partially clogged

ODS/pilot

6. Thermocouple damaged.

7. Control valve damaged.

1. Press in control knob fully.

2. After ODS/pilot lights, keep

control knob pressed in 30

seconds.

3. Fully open equipment shutoff

valve.

4. Hand tighten until snug, and

then tighten 1/4 turn more.

5. A) Contact local natural or

propane/LP gas company

B) Clean ODS/pilot (see

Care and Maintenance,

page 24) or replace ODS/

pilot assembly

6. Replace thermocouple.

7. Replace control valve.

www.usaprocom.com

27200068-01A

Problem Possible Cause Corrective Action

Burner does not light after

ODS/pilot is lit.

1. Burner orice is clogged.

2. Burner orice diameter is too

small.

3. Inlet gas pressure is too low.

1. Clean burner orifice (see

Care and Maintenance,

page 24) or replace burner

orice.

2. Replace burner orice.

3. Contact local gas supplier.

Delayed ignition of

burner.

1. Manifold pressure is too low.

2. Burner orice is clogged.

1. Contact local gas supplier.

2. Clean burner (see Care and

Maintenance, page 24) or

replace burner orice.

Burner backring during

combustion.

1. Burner orice is clogged or

damaged.

2. Burner is damaged.

3. Gas regulator is damaged.

1. Clean burner orifice (see

Care and Maintenance,

page 24) or replace burner

orice.

2. Replace burner.

3. Replace gas regulator.

Yellow ame during burn-

er combustion.

1. Not enough air.

2. Gas regulator is defective.

3. Inlet gas pressure is too low.

1. Check burner for dirt and

debris. If found, clean burner

(see Care and Maintenance,

page 24).

2. Replace gas regulator.

3. Contact local gas supplier.

Gas odor during com-

bustion.

1. Foreign matter between

control valve and burner.

2. Gas leak. (See Warning

Statement at top of page 25).

1. Contact a qualied service

technician to remove foreign

matter.

2. Locate and correct all leaks

(see Checking Gas Connec-

tions, page 15).

Slight smoke or odor

during initial operation.

1. Residues from manufactur-

ing process.

1. Problem will stop after a few

hours of operation.

Heater produces a whis-

tling noise when burner

is lit.

1. Turning control knob to high

position when burner is cold.

2. Air in gas line.

3. Air passageways on heater

are blocked.

4. Dirty or partially clogged

burner orice.

1. Turn control knob to low

position and let warm up for

a minute.

2. Operate burner until air is

removed from line. Have gas

line checked by local gas

supplier.

3 Observe minimum installa-

tion clearances (Figure 4,

page 9).

4 Clean burner (see Care and

Maintenance, page 24) or

replace burner orice.

TROUBLESHOOTING

www.usaprocom.com

200068-01A28

TROUBLESHOOTING

Problem Possible Cause Corrective Action

Heater produces a click-

ing/ticking noise just after

burner is lit or shut off.

1. Metal is expanding while

heating or contracting while

cooling.

1. This is common with most

heaters. If noise is exces-

sive, contact qualied ser-

vice technician.

White powder residue

forming within burner

box or on adjacent walls

or furniture.

1. When heated, the vapors

from furniture polish, wax,

carpet cleaners, etc., turn

into white powder residue.

1. Turn heater off when using

furniture polish, wax, carpet

cleaner or similar products.

Heater produces un-

wanted odors.

1. Heater is burning vapors from

paint, hair spray, glues, etc.

See IMPORTANT statement,

page 25.

2. Gas leak. See Warning State-

ment at the top of page 25.

3 Low fuel supply.

1. Open a window to ventilate

room. Stop using odor caus-

ing products while heater is

running.

2. Locate and correct all leaks

(see Checking Gas Connec-

tions, page 15).

3. Rell supply tank (Propane/

LP models).

Heater shuts off in use

(ODS operates).

1. Not enough fresh air is avail-

able.

2. Low line pressure.

3. ODS/pilot is partially

clogged.

1. Open window and/or door for

ventilation.

2. Contact local gas supplier.

3. Clean ODS/pilot (see Care

and Maintenance, page 24).

Gas odor exists even

when control knob is in

OFF position.

1. Gas leak. See Warning

Statement at top of page 25.

2. Control valve is defective.

1. Locate and correct all leaks

(see Checking Gas Connec-

tions, page 15).

2. Contact customer service.

Moisture/condensation

noticed on windows.

1. Not enough combustion/

ventilation air.

1. Refer to Air for Combus-

tion and Ventilation require-

ments, page 6.

Log set cycles to pilot,

but room temperature

drops to a lower than

ideal level before log set

comes back on.

1. Thermostat sensing bulb

needs to be repositioned.

1. Reposition thermostat sens-

ing bulb (see pages 16 and

17.

www.usaprocom.com

29200068-01A

REPLACEMENT PARTS

Contact authorized dealers of this product.

If they can’t supply original replacement

parts, call Customer Service toll free at

1-866-573-6074 for referral information.

When calling Customer Service or your

dealer, have ready:

• Your name

• Your address

• Model and serial number of your heater

• How heater was malfunctioning

• Type of gas used (Propane/LP or Natural

gas/NG)

• Purchase date

Usually, we will ask you to return the defective

part to the factory

Note: Use only original replacement parts. This will protect your warranty coverage for parts

replaced under warranty.

PARTS UNDER WARRANTY

PARTS NOT UNDER WARRANTY

Contact authorized dealers of this product.

If they can’t supply original replacement

part(s) call Customer Service toll free at

1-866-573-6074 for referral information.

When calling Customer Service have ready:

• Model number of your heater

• The replacement part number

TECHNICAL SERVICES

You may have further questions about installation, operation, or troubleshooting. If so, contact

ProCom Heating, Inc. at 1-866-573-0674.

When calling, please have your model and serial numbers of your heater ready.

ACCESSORIES

Purchase heater accessories and parts from your nearest dealer or service center. If they can

not supply an accessory or part, call ProCom Heating, Inc. at 1-866-573-0674.

EQUIPMENT SHUTOFF VALVE

For all models. Equipment shutoff valve with

1/8" NPT tap. Fits 1/2" NPT pipe.

www.usaprocom.com

200068-01A30

PARTS

MODELS WZ(N,L)18MVA, WZ(N,L)24MVA, WZ(N,L)30MVA

5

1

3

24" Log Set Shown

20

17

19

18

16

21

8

7

9

15

14

11

10

13

12

6

2

4

www.usaprocom.com

31200068-01A

PARTS

MODELS WZ(N,L)18MVA, WZ(N,L)24MVA, WZ(N,L)30MVA

This list contains replaceable parts used in your heater. When ordering parts, follow the in-

structions listed under Replacement Parts on page 29 of this manual.

ITEM

WZN18MVA WZN24MVA WZN30MVA DESCRIPTION QTY.

1 ** ** ** Grate Assembly 1

2 ** ** ** Burner Assembly 1

3 161816-01 161816-01 161816-01 ODS Assembly 1

4 ML083-03 ML083-03 ML083-03 Piezo Ignitor 1

5 ML073-03 ML073-03 ML073-03 Ignitor Cable 1

6 VL067-01 VL067-01 VL067-01 Switch 1

7 WZL008-01V WZL008-02V WZL008-03V Log Middle Bracket 1

8 WZL003-01 WZL003-02 WZL003-03 Log Rear Bracket 1

9 WZL002-01V WZL002-02V WZL002-03V Fixing Plate 1

10 MAL033-03 MAL033-03 MAL033-03 Knob Connector 2

11 MAL034-01 MAL034-01 MAL034-01 Knob Stem 2

12 MAL033-01 MAL033-01 MAL033-01 Control Knob 2

13 NRV82FB-3 NRV82FB-3 NRV82FB-3 Regulator 1

14 MAL027 MAL027 MAL027 Valve Connector 1

15 161814-01 161814-01 161814-01 Thermostat Valve Assy 1

16 WZL015-01 WZL015-02 WZL015-03 Log #1 1

17 WZL016-01 WZL016-02 WZL016-03 Log #2 1

18 WZL017-01 WZL017-02 WZL017-03 Log #3 1

19 WZL018-01 WZL018-02 WZL018-03 Log #4 1

20 WZL019-01 WZL019-02 WZL019-03 Log #5 1

21 WZL020-01 WZL020-02 WZL020-03 Log #6 1

** Not a eld replaceable part.

ITEM

WZL18MVA WZL24MVA WZL30MVA DESCRIPTION QTY.

1 ** ** ** Grate Assembly 1

2 ** ** ** Burner Assembly 1

3 161817-01 161817-01 161817-01 ODS Assembly 1

4 ML083-03 ML083-03 ML083-03 Piezo Ignitor 1

5 ML073-03 ML073-03 ML073-03 Ignitor Cable 1

6 VL067-01 VL067-01 VL067-01 Switch 1

7 WZL008-01V WZL008-02V WZL008-03V Log Middle Bracket 1

8 WZL003-01 WZL003-02 WZL003-03 Log Rear Bracket 1

9 WZL002-01V WZL002-02V WZL002-03V Fixing Plate 1

10 MAL033-03 MAL033-03 MAL033-03 Knob Connector 2

11 MAL034-01 MAL034-01 MAL034-01 Knob Stem 2

12 MAL033-01 MAL033-01 MAL033-01 Control Knob 2

13 NRV82FB-3 NRV82FB-3 NRV82FB-3 Regulator 1

14 MAL027 MAL027 MAL027 Valve Connector 1

15 161815-01 161815-01 161815-01 Thermostat Valve Assy 1

16 WZL015-01 WZL015-02 WZL015-03 Log #1 1

17 WZL016-01 WZL016-02 WZL016-03 Log #2 1

18 WZL017-01 WZL017-02 WZL017-03 Log #3 1

19 WZL018-01 WZL018-02 WZL018-03 Log #4 1

20 WZL019-01 WZL019-02 WZL019-03 Log #5 1

21 WZL020-01 WZL020-02 WZL020-03 Log #6 1

www.usaprocom.com

200068-01A32

3

24" Log Set Shown

15

12

14

13

11

16

2

1

7

9

4

5

6

8

10

PARTS

MODELS WZ(N,L)18HLA, WZ(N,L)24HLA

www.usaprocom.com

33200068-01A

ITEM WZL18HLA WZL24HLA DESCRIPTION QTY

1 ** ** Grate Assembly 1

2 ** ** Burner Assembly 1

3 ND1908x400x4 ND1908x400x4 ODS Assembly 1

4 ML083-03 ML083-03 Piezo Ignitor 1

5 ML073-03 ML073-03 Ignitor Cable 1

6 DPL047-01 DPL047-01 Knob 1

7 WZL008-01 WZL008-02 Log Mid Bracket 1

8 WZL003-01 WZL003-02 Log Rear Bracket 1

9 NRV82FB-8 NRV82FB-8 Gas Pressure Regulator 1

10 NV2020-1217 NV2020-1217 Control Valve 1

11 WZL015-01 WZL015-02 Log #1 1

12 WZL016-01 WZL016-02 Log #2 1

13 WZL017-01 WZL017-02 Log #3 1

14 WZL018-01 WZL018-02 Log #4 1

15 WZL019-01 WZL019-02 Log #5 1

16 WZL020-01 WZL020-02 Log #6 1

ITEM WZN18HLA WZN24HLA DESCRIPTION QTY.

1 ** ** Grate Assembly 1

2 ** ** Burner Assembly 1

3 ND1703x400x4 ND1703x400x4 ODS Assembly 1

4 ML083-03 ML083-03 Piezo Ignitor 1

5 ML073-03 ML073-03 Ignitor Cable 1

6 DPL047-01 DPL047-01 Knob 1

7 WZL008-01 WZL008-02 Log Mid Bracket 1

8 WZL003-01 WZL003-02 Log Rear Bracket 1

9 NRV82FB-3 NRV82FB-3 Gas Pressure Regulator 1

11 WZL015-01 WZL015-02 Log #1 1

12 WZL016-01 WZL016-02 Log #2 1

13 WZL017-01 WZL017-02 Log #3 1

14 WZL018-01 WZL018-02 Log #4 1

15 WZL019-01 WZL019-02 Log #5 1

16 WZL020-01 WZL020-02 Log #6 1

** Not a eld replaceable part.

PARTS

MODELS WZ(N,L)18HLA, WZ(N,L)24HLA

This list contains replaceable parts used in your heater. When ordering parts, follow the in-

structions listed under Replacement Parts on page 29 of this manual.

www.usaprocom.com

200068-01A34

NOTES

________________________________________________________________________

www.usaprocom.com

35200068-01A

NOTES

________________________________________________________________________

200068-01

Rev. A

06/16

WARRANTY

KEEP THIS WARRANTY

Model _______________________________

Serial No. ____________________________

Date Purchased _______________________

Keep receipt for warranty verication.

REGISTER YOUR PRODUCT AT WWW.USAPROCOM.COM

IMPORTANT: We urge you to register your product within 10 days of date of installation, complete

with entire serial number which can be found on the rating plate. Please ll out the warranty infor-

mation above for your personal records. Retain this manual for future reference.

Always specify model and serial numbers when communicating with customer service.

We reserve the right to amend these specications at any time without notice. The only warranty applicable

is our standard written warranty. We make no other warranty, expressed or implied.

LIMITED WARRANTY

ProCom Heating, Inc. warrants this product to be free from defects in materials and components for ONE

(1) year from the date of rst purchase, provided that the product has been properly installed by a qualied

installer in accordance with all local codes and instructions furnished with the unit, operated and main-

tained in accordance with all applicable instructions. To make a claim under this warranty, the Bill of Sale

or canceled check must be presented.

RESPONSIBILITY OF OWNER

This warranty is extended only to the original retail purchaser. This warranty covers the cost of part(s)

required to restore this heater to proper operating condition. Warranty part(s) MUST be obtained through

ProCom Heating, Inc. who will provide original factory replacement parts. Failure to use original factory

replacement parts voids this warranty.

IMPORTANT: The heater MUST be installed by a qualied installer in accordance with all local codes

and instructions furnished with the unit or the warranty is voided.

WHAT IS NOT COVERED

This warranty does not apply to parts that are not in original condition because of normal wear and tear or

parts that fail or become damaged as a result of misuse, accidents, lack of proper maintenance or defects

caused by improper installation. Travel, diagnostic cost, labor, transportation and any and all such other

costs related to repairing a defective heater will be the responsibility of the owner.

TO THE FULL EXTENT ALLOWED BY THE LAW OF THE JURISDICTION THAT GOVERNS THE SALE

OF THE PRODUCT, THIS EXPRESS WARRANTY EXCLUDES ANY AND ALL OTHER EXPRESSED

WARRANTIES AND LIMITS THE DURATION OF ANY AND ALL IMPLIED WARRANTIES. INCLUDING

WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE TO ONE (1)

YEARS ON ALL COMPONENTS FROM THE DATE OF FIRST PURCHASE. PROCOM HEATING, INC.'S

LIABILITY IS HEREBY LIMITED TO THE PURCHASE PRICE OF THE PRODUCT AND PROCOM HEAT-

ING, INC. SHALL NOT BE LIABLE FOR ANY OTHER DAMAGES WHATSOEVER INCLUDING INDIRECT,

INCIDENTAL OR CONSEQUENTIAL DAMAGES.

Some states do not allow a limitation on how long an implied warranty lasts or an exclusion or limitation of

accidental or consequential damages, the above limitation on implied warranties, or exclusion or limitation

on damages may not apply to you.

This warranty gives you specic legal right, and you may also have other rights that vary from state to state.

ProCom Heating, Inc.

Bowling Green, KY 42101

www.usaprocom.com

1-866-573-0674

Procom WZL24MVA Ventless Propane Gas Log Set - 24in., 34,000 BTU, Millivolt Control, Model#

Product's Documents

User Manual

Specifications

Procom WZL24MVA Questions and Answers