Install Instructions

Part Number 550-142-902/1016
CGi
GAS-FIRED WATER BOILER — SERIES 3 — Boiler Manual
18
Venting — direct exhaust — installation
3f
1. Donotmixtypesormanufacturersofventmateri-
als.
2. Cleanalljointsbeforesealing.Seeventmanufac-
turer’s instructions for cleaning and sealing joints.
Usetheirspeciedsealant.Donotusescrews.
3. Install vent pipe with seams on top of vent horizon-
talruns.FollowrequirementsinSection3e for vent
termination.
4. Maintainminimum2”clearancefromcombustible
materials to vent pipe.
5. Vertical venting— See Figure 13. Follow vent
manufacturer’s instructions for venting through
roof.
• Ventpipemustextendthroughroofashing,
jacket or thimble.
• Ventmaypassthroughoor,insidewallor
concealed space when installed according to
vent manufacturer’s instructions.
Sidewall venting—SeeFigures 14 and 15.
Vent mustterminateatleastonefootabove
anticipatedsnowline.Ven tmustbeterminated
only with:
• Tee orelbowwithintegralscreen.( Te e maybe
mounted either vertically or horizontally. DO
NOT
usehorizontalteewithCGi‑7orCGi‑8.)
• Elbowandterminationcouplingwithscreen
(notavailableforStaR‑34).
6. Donotsealventpipe(slipconnectorforSaf‑TVent)
to inside or outside plate.
7. If passing through noncombustible wall, provide
hole diameter large enough to insert the vent pipe
(slipconnectorforSaf‑TVent).
8. Install horizontal drain tee as close as possible to
boiler,inrsthorizontalrun.SeeFigures 13 and 14.
9. Do not exceed the maximumventsystem length
given in Table 4, page 15.
 Condensatedrainline—useonly siliconetubingrated
foratleast400°Ffortherst18”ofcondensatedrain
line, then other non-metallic tubing may be used. Us-
ing any other material could cause flue gas leakage,
potentially resulting in severe personal injury, death or
substantial property damage.
On some installations, the condensate drain fitting may
be omitted, provided:
•  Vent manufacturershowsthisoptionintheirinstruc-
tions.
• Vent isslopedtowardterminationasshownindotted
lines in Figure 14.
• The vent is installed per Weil‑McLain and vent
manufacturer’s instructions.
• Condensatedrippagefromsuchventsmayaccumu-
lateonthegroundbelow.Considertrafcinthearea
to avoid hazard due to ice accumulation.
Figure 13 Direct exhaust vertical venting
Figure 14 Direct exhaust sidewall venting