Temperature and Pressure-Relief Valve
DO NOT
plug the temperature and pressure-
relief valve or its discharge line.
DO NOT
remove
the relief valve. Make sure the relief valve is
properly sized for the water heater. If the relief valve
continuously discharges water, call a qualified
service technician to correct the problem. Failure
to follow these instructions can result in property
damage, personal injury, or death.
To protect from excessive pressure and/or tempera-
ture, the manufacturer has installed a temperature and
pressure-relief valve that meets the requirements of
the Standard for Relief Valves and Automatic Gas
Shut-Off Devices for Hot Water Supply Systems,
CSA 4.4, in Canada, and ANSI Z21.22, in the United
States. This relief valve has a maximum set pressure
that does not exceed the hydrostatic working pres-
sure of the water heater (150 psi = 1,035 kPa) and a
BTUH rating equal to or greater than the input rating, as
shown on the water heater rating plate. It should never
be plugged or removed from the opening marked for it on
the water heater.
Should this relief valve need to be replaced, use only
a new temperature and pressure-relief valve. Never
install an old or existing relief valve, as it may be
damaged or inadequate for the working requirements of
the new water heater. This new relief valve must meet
all local codes or, at a minimum, the requirements listed
above. Never install any other type of valve between
the relief valve and the water heater.
A discharge line must be installed into the relief valve.
The discharge line:
• Must not be smaller than the outlet pipe size of the
relief valve.
• Must not terminate less than six (6) inches (15.2
10
INSTALLATION INSTRUCTIONS
Figure 10
1) Vent pipe
2) Power vent assembly
3) Union
4) Cold water
manual shut-off valve
5) Cold water inlet
6) Expansion tank
7) Temperature
& pressure-relief valve
8) Overflow tube
9) Drain valve
10) Drain pan
11) Free-flowing floor drain
12) Inner access door
13) Outer access door
14) Cap
15) Drip leg (Sediment trap)
16) Gas supply
manual shut-off valve
17) Union
18) Gas control valve
19) Rating plate
20) Side tappings
21) Dip Tube
22) Hot water outlet
23) Union
24) Ignitor
25) Flame sensor
26) Burner orifice
27) Burner
2
5
6
3
4
7
8
20
9
10
11
13
12
14
15
16
18
19
22
23
21
27
25
24
26
1
Minimum Slope
1/4”/foot (21mm/m)
17
