Weil-McLain EVERGREEN PRO EVG-299 User Manual

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Allowablevent/airpipematerials&lengths

Use only the vent materials and kits listed in

Figure24,page21. Provide pipe adapters if

specied.

1. Locate the terminations such that the total air pip-

ing and vent piping from the boiler to the termina-

tion will not exceed the maximum length given in

Figure23,page20.

For polypropylene applications, comply with

any additional requirements in the vent system

manufacturer’s instructions. Provide 4” PVC-

to-PP transition pieces at the boiler vent and

air connections. PP adapter must have smooth,

straight section of pipe to insert in to the boiler

vent and air connections and must t and seal

tightly. PP adapters with their own seal which

would interfere with the internal seal of the

boiler vent or air connections must not be

used. Refer to page117 for a list of compliant

adapters. Install a locking collar at every joint.

For AL29-4C vent pipe applications, comply

with any additional requirements in the vent

system manufacturer’s instructions. Provide a

4”PVC transition piece at the boiler vent con-

nection. e air piping must be PVC or CPVC.

2. For 4” to 3” transitions, must use appropriate vent

material. For polypropylene or stainless steel must use

approved suppliers transitions (EVG 220 only).

Determineterminationlocation

1. Wall penetration thickness between 0” to 24”.

2. e air and vent terminations must be installed as shown

in Figure37.

3. The terminations must comply with clearances and

limitations shown in Figure25,page23.

4. Locate the terminations so they are not likely to be dam-

aged by foreign objects, such as stones or balls, or subject

to buildup of leaves or sediment.

Multiplevent/airterminations(Figure38,page32)

1. When terminating multiple Evergreen

boilers, terminate

each vent/air connection as described in this section.

Terminate all vent pipes at the same height

and all air pipes at the same height to avoid

possibility of severe personal injury, death or

substantial property damage.

2. Place roof penetrations to obtain minimum clearance of

12inches between edge of air intake elbow and adjacent

vent pipe of another boiler for U. S. installations (see

Figure38,page32). For Canadian installations, provide

clearances required by

Natural Gas and Propane Instal-

lation Code, CAN/CSA

B149.1 or B149.2 Installation

Code and a ULCS636 compliant vent kit.

3. e air inlet of a Evergreen

boiler is part of a direct vent

connection. It is not classied as a forced air intake with

regard to spacing from adjacent boiler vents.

Figure37 Separate pipes vertical termination

Terminateventandairpipessuchthat:

a AIRINTAKEIS AT LEAST 12 inches below vent outlet.

b AIRINTAKEIS AT LEAST 12 inches above roof or snow line,

Keep vents/air intake area clear of accumulating snow.

c Ventandairterminationsarettedwithbirdscreens.

Step1 Read and follow all instructions in this manual. DO NOT

proceedwithvent/airinstallationuntilyouhaveread

page19throughpage24.

See notices

at le.

Step2 Install the boiler in a location that allows proper routing of all

vent and air piping to the selected location.

Step3 Make sure the selected vertical termination location complies

with Figure25,page23. (Multiple boiler terminations must also

comply with Figure38,page32.)

Step4 Use only the vent materials listed in Figure24,page21. Provide

pipe adapters where required. Vent piping and air piping lengths

must not exceed the values shown in Figure23,page20.

Step5 Prepare the vertical penetrations and secure penetration com-

ponents as instructed in this section. See “Prepare roof penetra-

tions” and “Termination and ttings” on page32.

Step6 e air piping must terminate in a 180-degree return bend or

down-turnedelbow as shown above. e vent piping must

terminate in a couplingpointedupward as shown above.

Step7 Install vent and air piping between the boiler and the vertical

terminations. Slope horizontal piping downward toward the

boiler at least 1/4 inch per foot. Install pipe supports every 5 feet

on both the horizontal and vertical runs. Install a hanger sup-

port within 6inches of any upturn in the piping. See page38 for

general guidelines. Also comply with vent pipe manufacturer’s

instructions.

See notices at le.

Step8 Insert the vent and air piping through the vertical penetrations

and secure the termination ttings.

Step9 Maintain clearances shown above. Vent and air terminations

must be tted with a bird screen as shown.

USESWEEPELBOWSFORALLVENTAND

AIRPIPING — DO NOT use short radius elbows

for vent or air piping. Boiler performance could be

aected.

Part number 550-100-211/0122

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Weil-McLain EVERGREEN PRO EVG-299 Gas Boiler Evergreen High Efficiency Gas Boiler

User Manual - Page 31