Dayton 7D851 150,000 BtuH Gas Infrared Tube Heater

In locations used for the storage of combustible materials, signs

must be posted to specify the maximum permissible stacking

height to maintain the required clearances from the heater to

the combustibles. Signs must either be posted adjacent to the

heater thermostats or, in the absence of such thermostats, in a conspicuous

location.

Keep these instructions for future reference.

Please read and save these instructions. This heater must be installed and serviced by trained gas installation and service

Dayton Tube Heaters

®

Description

Dayton tube heaters are gas-red infrared heaters designed to provide comfort

heat. They consist of three (3) main components: a burner control box, radiant

tube, and reector assembly. The heaters are typically suspended from the ceiling

by chains and controlled by a thermostat. They can be installed either vented or

unvented, and may use outside air for combustion if necessary. The radiant tube

may be installed in different congurations depending on the heating requirements.

These heaters use infrared energy to heat spaces. When heat is required, the

tube heaters can heat large spaces without having to provide primary infrared

for every square foot of area. However, if the goal is to spot heat a small area

within a large space, only the primary infrared makes this possible. Dayton tube

heaters are design certied for use in industrial and commercial buildings, such

as warehouses, manufacturing plants, aircraft hangars and vehicle maintenance

shops. They are not certied for residential use or where ammable gases or

vapors are generally present, such as spray booths.

• Do not try to light any appliance.

• Immediately call your gas supplier

from a neighbor’s phone.

supplier, call the re department.

For Your Safety - If you smell gas:

5VD73A-

5VD78A

5EAJ0-J2,

5EAH3-H5

5VD79A-80A,

5EAH6-H8

Part # Description 20 ft. 30 ft. 40ft. 50ft. 60ft.

4” Reector Center Support 2 3 4 5 6

24” Stainless Steel Flexible Gas Connector 1 1 1 1 1

Reector End Cap 2 2 2 2 2

Reector End Cap Clips 8 8 8 8 8

Tube Heater Chain Sets 5 6 7 8 9

The intent of this manual is to provide information regarding general safety, installation, operation, and maintenance of

this tube heater. You must read and understand all instructions and safety warnings before installing or servicing the tube

heater.

Bafe

Quantity Gas Type

7D837A 5VD67A 5VD88 20-4”-ALUM 20 50,000 5 NAT

7D838A 5VD68A 5VD88 20-4”-ALUM 20 50,000 5 PROP

located in areas where they will not be

subject to damage by aircraft, cranes,

moveable scaffolding, or other objects.

Electrical:

The heater, when installed, must be

electrically grounded in accordance

Venting:

Venting must be installed in

accordance with the requirements set

forth in this manual and with the

system.

In the absence of local codes, the installation must conform to the latest edition

of the National Fuel Code ANSI Z223.1 (NFPA 54).

Refer to the following Standards and codes for application specic guidelines:

This unit complies with or is certied

by one or more of the following

organizations or standards:

• CSA International (CSA).

• American National Standards (ANSI

Z83.20b).

clearances to

combustibles. Failure

to comply with the

stated clearances to combustibles

could result in personal injury, death,

and/or property damage.

minimum clearances

to combustibles,

as marked on the

the minimum distance that must be

.

installation, consult your local re

marshal, re insurance carrier, or other

qualied authorities for the approval of

the proposed installation.

Safety Signs and Labels

It is important to provide warnings to

alert individuals to potential hazards

and safety actions. ANSI Z83.20 and

CSA 2.34, require you to post a sign

“specifying the maximum permissible

All safety labels must be maintained

on this appliance. Contact Grainger if

replacement labels are needed.

maintain clearances from:

• Gas and electrical lines

• Combustible and explosive materials

• Chemical storage areas

• Areas of high chemical fume

concentrations

• Vehicle parking areas

• Vehicle lifts

• Hoists or cranes

• Storage areas with stacked materials

For the safe installation of this unit, the clearance to combustibles data below (Figure 1.1) contains clearances that must be

maintained. Check the heater’s rating plate to verify the minimum clearance to combustibles and gas type for your model heater.

Minimum end clearance for all models is 12 inches. *Heaters mounted on an angle between 0° and

45° must maintain clearances posted for both 0° and 45° mounting angles, whichever is greater.

45° 39 8 10 47

45° 39 8 10 60

45° 39 8 10 66

45° 58 8 10 76

45° 58 8 10 81

45° 63 8 10 92

45° 63 8 10 94

70’

20’ - 75,000 BTU

(4 total)

Doors and

Tracks

bafe. Refer to Bafe Assembly

section.

50-100 MBH 10 ft.

125 MBH 15 ft.

200 MBH 25 ft.

Figure 2.14 • Burner Control Box Assembly • Side View

Figure 2.15 • Burner Control Box with U-Bend • End View

Figure 2.16 • Reflector Assembly

3. To prevent the reectors from

Reectors, and reector accessories,

direct infrared energy to the oor

level. The reector assembly depends

on the heater conguration, proximity

Reector Tension

extension(s) are used. extension(s) are used.

NOTE: Bafes may be inserted into the

1. Determine the number of bafes

3. Insert one bafe tab into keyhole

keyhole and rotate the bafe 90° to

lock the bafe sections together.

5. Repeat this process with remaining

bafe sections to complete

3. Slide bafe assembly into the last

an unconditioned space. Venting

through an unconditioned space

promotes condensation. When venting

through an unconditioned space is

unavoidable, or if the unit is installed in

an area that is prone to condensation,

insulate venting runs greater than 5 feet

to minimize the production of

condensation. Inspect for leakage prior

to insulating the venting and only use

When venting pipe passes through a

combustible interior wall or oor, a

metal thimble with a diameter 4 inches

greater than the vent pipe diameter

must be used. If there is 6 feet or more

of vent pipe prior to passing through

the combustible wall or oor, then the

metal thimble need only be 2 inches

greater than the vent pipe diameter. If a

metal thimble is not used, all clearances

a combustible wall or oor. When

using type B vent or Duravent PVP

venting, follow the manufacturer’s

combustibles. Any material used to

close or insulate the opening must be

non-combustible.

• The equivalent length for a 4 inch 90°

• Avoid using more than two 90°

• Vent termination must maintain a

• The vent terminal must be installed to

• Consult NFPA ANSI Z223.1 Gas Vent

non-positive vent static pressure and

with a vent gas temperature that avoids

excessive condensate production in the

vent is said to be ‘Category I’. The

heater is considered a Category I

appliance if the venting system meets all

of the following criteria:

• The vent system terminates vertically

• The length of the horizontal portion

of the vent run is less than 75% of

the vertical rise length. (e.g.- If the

vertical vent height is 10 feet, the

horizontal run is less than 7 1/2 feet).

• The vent terminates a minimum of 5

feet above the vent connection on

venting must comply with all parts of

this section, in addition to the

requirements of the general venting.

Category I (Vertical) venting is venting

at a non-positive pressure. An

appliance vented as a Category I is

and the vent system does not have to

be ‘gas tight’. It is recommended that

the venting system is installed with a

• Utilize a listed type B vent termination

• The vent terminal must extend a

• Vent caps should be located a

All vertically vented heaters that are

death. Connect gas lines in

• Verify that the heater’s gas type (as

of your application.

• Check that the gas piping and

service has the capacity to handle

the total gas consumption of all

heaters being installed, as well as

any other gas appliances being

Manifold Pressure

Minimum

Inlet Pressure

Propane 10.0 Inches W.C. 11.0 Inches W.C. 14.0 Inches W.C.

• If utilizing used pipe, verify that its

• Test and conrm that inlet pressures

This heater must be installed and

serviced by trained gas installation

and service personnel only.

expand and contract during operation.

Allowances for expansion must be

made between the connection to the

heater and the gas supply. Excessive

bending, kinks, twists, or vibration must

be avoided. A exible gas connection of

approved type is required. Flexible

in one plane, and without sharp bends,

damage, injury, or death. Only trained,

qualied gas installation and service

personnel may install or service this

equipment.

The gas pipe and connection must be

supported independently. Do not

beginning of this section.

connector suitable for the

environment. Do not use the gas

piping system to electrically ground the

1. Install a sediment trap / drip leg if

W.C. (water column pressure) requires

a high pressure regulator and ball

3. Attach the ball valve to the gas

Ball Valve/Inlet Tap

Remove cap to clean

Gas Connector

re or explosion and cause serious

injury or death. Test in accordance

with NFPA or local codes.

adapter and burner control box

inlet. Seal the joints.

• Observe proper electrical polarity.

• It is recommended that the

• Clearances to combustibles must

1. Verify that service lid is secured.

2. Open (turn on) gas supply to the

SHUTDOWN PROCEDURES:

1. Open (turn off) electrical circuit.

2. Close (turn off) gas supply to the

3. Wait ve (5) minutes before