INSTALLATION INSTRUCTIONS
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.
If this relief valve should 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 require-
ments 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
cm) and not more than twelve (12) inches (30.5
cm) above a floor drain.
• Must not be restricted in any way. Do not thread,
cap, or in any way restrict the end of this outlet.
• Must be of a material capable of withstanding
210
o
F (99
o
C) without distortion.
• Must be installed to allow complete drainage of the
relief valve and discharge line.
• Must terminate at an adequate free-flowing drain.
8
1) Vent pipe
2) Drafthood
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) Combustion
air intake holes
11) Drain pan
12) Free-flowing floor drain
13) Sight glass
14) Resettable
thermal switch
15) Inner access door
16) Outer access door
17) Cap
18) Drip leg (Sediment trap)
19) Gas supply
manual shut-off valve
20) Union
21) Gas control valve
22) Rating plate
23) Piezo igniter
24) Dip tube
25) Hot water outlet
26) Union
27) Burner
28) Main burner orifice
29) Pilot
30) Thermocouple
31) Electrode
Figure 8
1
2
5
6
3
4
24
7
8
23
9
10
11
12
16
15
14 13
20
17
18
19
21
22
25
26
27
29
31
30
28
Minimum Slope
1/4”/foot (21mm/m)
WARNING
DANGER
