Install Instructions

Part number 550-100-090/1113
GAS-FIRED WATER BOILER — Boiler Manual
62
Vent/air piping — options
Vent and air pipe termination options
1. Vent and air piping must terminate out the sidewall or through
the roof of the building, using only one of the methods described
in this manual.
2. Sidewall options (see Figure 67, left side):
a. TOP: Weil-McLain termination cap (kit included with
boiler) — see page 18 for instructions.
b. MIDDLE: Concentric PVC pipe (requires special kit,
page 113).
c. BOTTOM: Separate air pipe and vent pipe.
3. Vertical options (Figure 67, right side):
a. TOP: Concentric PVC pipe (requires special kit, page 113).
b. BOTTOM: Separate air pipe and vent pipe.
Vent and air pipe diameters
1. Vent and air pipe diameters can be as specified in Figure 66.
&IGURE Vent and air pipe options — summary
Ultra model
Vent or air
pipe size
t.BYJNVNFRVJWBMFOUGFFUPGQJQJOH
t/VNCFSPGFMCPXTBMMPXFEBUUIFTFMFOHUIT
(All applications include allowance for the termination.)
Sidewall
with
W-M Cap
Sidewall
with
separate
pipes
3” PVC Concentric
Sidewall or Vertical
(Use only PVC pipe DO
NOT use CPVC or ABS)
Vertical
with
separate
pipes
Length Ells Length Ells Length Ells Length Ells
80/105
2” * 100
(ab) 2 100 2 100 (ab) 1 100 1
3” 100 2 100 2 100 1 100 1
155 3” 100 2 100 2 100 1 100 1
230
3” 30
(c) 2 30 (c) 2 30 (c) 1 30 (c) 1
4” 100 (d) 2 100 2 70 (d) 1 100 1
299 4” 100 2 100 2 70
(d) 1 100 1
399 4” 100 2 100 2 NA 100 1
Equivalent feet for elbows — deduct from maximum equivalent length of piping:
tGFFUQFSGPSFBDIJODIFMCPXPSJODI¡MPOHSBEJVTPS¡FMCPX
tGFFUGPSFBDIPSJODITIPSUSBEJVTFMCPX
a — Use 3"x2" reducer at boiler CUse 3”x2” PVC reducers at termination
c — Use 4”x3” reducer at boiler d — Use 4"x3" PVC reducers at termination
Stainless (AL29-4C) vent pipe — install an adapter at the boiler for all applications.
"MTPJOTUBMMBOBEBQUFSBUUIFUFSNJOBUJPOVOMFTTVTJOHTFQBSBUFQJQFUFSNJOBUJPO
6MUSBBOECPJMFSTJOTUBMMFEXJUIJODIWFOUQJQJOHBVUPNBUJDBMMZEFSBUF
due to the pressure loss in the vent and air piping. The derate ranges up to 10% for
UIF6MUSBBUGFFUPSGPSUIF6MUSBBUGFFU
Vent and air pipe minimum length
1. Vent pipe and air pipe must each be ATLEASTFEETLONG, with
2 elbows if sidewall venting or 1 elbow if vertical venting.
Vent and air pipe installation sequence
3TEP Install the boiler.
3TEP Determine the termination method — sidewall or vertical,
concentric or separate pipes, etc.
&IGURE 6ENTANDAIRTERMINATIONOPTIONS
Sidewall
termination
7EIL-C,AINSIDEWALL
TERMINATIONPLATE
(See PAGE
7EIL-C,AIN
v06#CONCENTRIC
TERMINATION
(See PAGE
3IDEWALLTERMINATION
WITHSEPARATEVENT
ANDAIRPIPES
(See PAGE
Vertical
termination
7EIL-C,AIN
v06#CONCENTRIC
TERMINATION
(See PAGE
6ERTICALTERMINATION
WITHSEPARATEVENT
ANDAIRPIPES
(See PAGE
3TEP Determine proper location for wall or roof
penetration for each termination.
3TEP Install termination assembly as described in
this manual.
3TEP Install air and vent piping from boiler to ter-
mination.
3TEP Install pipe supports and brackets as required.