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PV500-46U 06/12
TWO WATER HEATERS WITH REVERSE RETURN PIPING
6 CONDENSATE DRAIN, TRAP & DISPOSAL
The POWER VT PLUS water heater is designed to produce significant amounts of condensate because of its high
efficiency. Condensate occurs naturally when water vapor in combustion gases is cooled below the dew point. Two
3/4” NPT drain connections are provided. A trap with three inches of standing water below the bottom of the heater
(3” above the base of the I-Beam skids), and no higher than the bottom of the heater must be field installed as part
of the condensate piping.
WARNING: A trap with three inches of standing water as described in these instructions must be included
as part of the condensate piping system. This trap is required to keep hazardous products of combustion
from continually entering the room through the condensate piping. Failure to provide this trap can cause,
personal injury, exposure to hazardous materials or loss of life.
1. Installing the water heater on a 4 inch to 6 inch housekeeping pad is recommended to ensure proper
condensate drainage.
2. Attach a 3/4” CPVC Coupling and Tee to the economizer condensate drain, then use 3/4” CPVC pipe to plumb
from the heater condensate outlet to economizer Tee, to a 3” CPVC trap and on to a suitable floor drain or
collection system. Each condensing appliance must drain separately. Do not combine condensate drains from
multiple condensing appliances into a single drain pipe.
3. Each condensate drain must contain a trap or siphon/pigtail to provide at least 3 inches of standing water, to
prevent flue gas flow through the condensate piping. To construct the trap, connect to the 3/4” condensate
drain, route the piping downward until the standing water in the trap is not higher than the bottom of the water
heater.
4. Install the condensate plumbing as shown in the following diagram.
5. All condensate plumbing must be protected from freezing. Do not locate the condensate piping such that an ice
dam of frozen condensate can block the outlet.