Instructions / Assembly

7
!
WARNING: The
pressure rating of
the relief valve
must not exceed
150 PSI, the
maximum working
pressure of the
water heater as
marked on the
rating plate.
A new combination temperature and pressure relief valve, complying with the Standard for Relief
Valves for Hot Water Supply Systems, ANSI Z21.22/CSA 4.4, is factory installed and must remain
in the opening provided and marked for the purpose on the water heater. No valve of any type
should be installed between the relief valve and the tank.
Relief Valve
The btu/h rating of the relief valve must
not be less than the input rating of the
water heater as indicated on the rating
label located on the front of the heater
(1 watt=3.412 btu/h).
Connect the outlet of the relief valve
to a suitable open drain so that the
discharge water cannot contact live
electrical parts or persons and to
eliminate potential water damage.
Piping used should be of a type
approved for hot water distribution.
The discharge line must be no smaller
than the outlet of the valve and must
pitch downward from the valve to allow
complete drainage (by gravity) of the
relief valve and discharge line. The
end of the discharge line should not be
threaded or concealed and should be
protected from freezing. No valve of
any type, restriction or reducer coupling
should be installed in the discharge line.
Typical Installation
6" Minimum clearance above heat
pump to allow for lter maintenance
Ceiling
Air lter
Drain
valve
Hot water outlet
to xtures
Temperature
and pressure
relief valve and
discharge line
Shut-off
valve
Cold water
supply
Thermal expansion
tank (if required)
6" Air gap
Heat trap
6" Min
Primary
condensation
(3/4") to open
drain or
outdoors
Flexible Connection
recommended
(Such as PEX)
Flexible Connection
recommended
(Such as PEX)
Secondary condensate tubing
(3/8") to open drain or outdoors