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Installation instructions
23
3.12.3 Connecting the condensate water drain to
the appliance
Fig. 34 Appliance drain installation
Condensate drain requirements
An external condensate drain (not supplied with the
heater) must be installed under the following condi-
tions:
• All vertical terminating vent installations.
• Horizontal terminating vent installations where the
total vent length is greater than 6 feet (1.8 m).
• Vent installations where any section of the exhaust
vent pipe passes through an unconditioned space.
Note: Do not install condensate drain in areas where it
may freeze.
1. Install condensate drain as close to heater as
possible.
2. The condensate must be disposed of according to
local codes.
Fig. 35 External condensate drain installation
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Use materials approved by the authority
having jurisdiction. In the absence of other
authority, PVC, and CPVC pipe must
comply with ASTM D1785, F441 or
D2665. Cement and primer must comply
with ASTM D2564 or F493. For Canada,
use CSA or ULC certified PVC or CPVC
pipe, fittings and cement, see table 3.
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The condensate must be disposed of in
accordance with local codes.
See chapter 3.10 “Filling the condensate
trap”.
Leave min. 1/4” air gap
1 1/2” x 3/4” PVC Reducer
Trap required
Warning:
Failure to properly install condensate
drain will void the warranty.
Connect drain pipe to sewer,
if allowed by local codes.
4” Min.
Condensate drain
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