23
CONDENSATE PIPING
This water heater is a condensing unit and requires a drain to be
located in close proximity to allow the condensate to drain safely.
The condensate drains from the unit at the exhaust tee located at
the bottom of the unit (see Figure 11). Condensate from this water
heater is mildly acidic. Please note that some local codes require
that condensate is treated by using a pH neutralizing lter prior to
disposal.
Caution must be used to ensure that the drain is free and clear of
debris and will not allow backow through the condensate hose.
Consideration must be given to avoid freezing of the condensate
lines which could result in excessive build up of condensate inside
the water heater.
Waterproof heat tape may be required to prevent
freezing of the condensate
lines. Please ensure that the outlet of the
condensate drain does not create a slippery condition which could
lead to personal injury.
Condensation warning: this water heater i s a condensing unit and
requ ire s a drai n to be l ocat ed in c lose proxi mit y to all ow co nden sat e
to dra in saf ely. The co nden sate drai ns fro m unit at the ex haus t elb ow
located at bottom of unit. Note: it is impor tant that the condensate
hose not be elevated above the exhaust elbow, see Figure 11.
Condensate build-up will block the exhaust outlet, which will cause
improper operation.

Figure: 11

The condensate drain line must be routed to a suitable drain. If
no oor drain is available or the drain is above the level of the
condensate line, install a con densate pump that is resistant
to the acidic condensate. These pump s are available fr om
local dist ributors. If the pump is not re sistant to acidic water, a
condensate neutral izer must be used ahead of the pump. When
installing the drain line, note the follow ing:
• Plastic p ipe or tubing must be us ed to connect the co ndensate
drain to a suitable drain or condensate pump. Do not use copper
tubing, iron, or steel pipe for the cond ensate drain line.
• Condensate drai n lines should be installed in conditioned areas
only. Drain lin es installed in areas that are subject to freezing
temperatures should be wrapped with a nationally recognize d/
listed heat tape and/or approved insulation for freeze protection.
Install per manufacturer’s instructions.
• Do not common drain with the temperature and pre ssure relief
valve or the condensate line from an air conditioner evapor ator
coil.
• Slope the condensate drain toward the inside oor drain or
condensate pump.
• The condensate dr ain line and connection to the drain pipi ng
must comply with all local cod es.
HIGH ALTITUDE INSTALLATIONS
This high efc iency water heater is certied for use without
modication fo r an altitude of 10,100 feet (3,078 m). Consult t he
factory for installation at alt itudes over 10,100 feet (3,078 m).
Some gas utility companies der ate their gas for altitude, making it
unnecessary to install high altitude orices. Call the loc al gas or
utility company to verify BTU co ntent.
Due to the input r ate reduction at high a ltitudes, the output rat ing
of the water heater is also reduced and should be co mpensated
for in the sizing of the equipment for applic ations.
FILLING THE WATER HEATER
Never use this water he ater unless it is comp letely full of water.
To prevent damage to the tank, the tank m ust be lled with water.
Water must ow from t he hot water faucet before turning ON gas
to the water heater.
To ll the water heater with water:
1. Close the water heater drain valve by turn ing the handle to the
right (clockw ise). The drain valve is on the lower front of the
water heater.
2. Ope n the cold water supply valve to the water heater.
NOTE: The col d water sup ply valve mu st be left op en when th e
water heater is in use.
3. To insure complete lling of the tank, allow air to exit by opening
the nearest hot water faucet. Allow water to run until a constant
ow is obtained. This will let air out of the water he ater and the
piping.
4. Check all water p iping and connections for leaks. Repair as
needed.
Exhaust
Elbow