7
General Information continued-
Temperature and Pressure Relief Valve
WARNING
Keep clear of the combination temperature and pressure relief valve discharge line outlet.
The discharge
may be hot enough to cause scald injury. The water is under pressure and may splash.
For protection against excessive temperatures and pressure, install temperature and pressure protective equipment
required by local codes, but not less than a combination temperature and pressure relief valve certified by a
nationally recognized testing laboratory that maintains periodic inspection of production of listed equipment or
materials as meeting the requirements of the Standard for
Relief Valves and Automatic Gas Shutoff Devices for Hot
Water Supply Systems, ANSI Z21.22
and the Standard
CAN1-4.4 Temperature, Pressure, Temperature and
Pressure Relief Valves and Vacuum Relief Valves
. The combination temperature and pressure relief valve must be
marked with a maximum set pressure not to exceed the maximum working pressure of the water heater. The
combination temperature and pressure relief valve rating must not be less than the hourly rating of the water heater.
Install the combination temperature and pressure relief valve into the opening provided and marked for this purpose
on the water heater.
Note:
Some models may already be equipped or supplied with an installed combination temperature and pressure
relief valve. Verify that the combination temperature and pressure relief valve is in compliance with local codes. If the
combination temperature and pressure relief valve does not comply with local codes, replace it with one that does.
Follow the installation instructions above on this page.
Install a discharge line so that water discharged from the combination temperature and pressure relief valve will exit
within 6 in
(15.2 cm)
above, or any distance below the structural floor and cannot contact any live electrical part. The
discharge line is to be installed to allow for complete drainage of both the combination temperature and pressure
relief valve and the discharge line. The discharge opening must not be subjected to blockage or freezing. DO NOT
thread, plug or cap the discharge line. It is recommended that a minimum clearance of 4 in
(10.2 cm)
be provided on
the side of the water heater for servicing and maintenance of the combination temperature and pressure relief valve.
DO NOT place a valve between the combination temperature and pressure relief valve and the tank.
Condensate Drain
The water heater should either be raised several inches above the floor on a concrete slab or use a low profile condensate
pump to allow free drainage of condensate from the elbow drain fitting. This water heater is a condensing type 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 factory installed exhaust condensate elbow located near the bottom of the unit. Using an approved primer and
cement (refer to Section VI: Venting, page 17), connect a 3/4" elbow or 3/4" coupling over the outside of the drain outlet
and use 3/4" pipe for the drain trap and condensate line to a drain. Make sure the condensate drain line slopes down, away
from the water heater at least 1/8 in/ft toward the drain. The condensate drain pipe must not be routed through an area
subject to below freezing temperatures. The condensate build-up will block the exhaust outlet, which will cause improper
operation. Refer to Figure 2 for the proper connection of an elbow to the drain outlet and a condensate trap.
CAUTION
Failure to properly install the condensate drain as directed above, as well as shown in Figure 2 may result in damage
and/or cause improper operation of to the water heater. Any damage resulting from failure to install the condensate
drain as directed will not be covered by the warranty.
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