State Water Heaters GPG/GPV-540A Instruction Manual page 14

TEMPERED WATER
OUTLET
COLD
WATER
INLET
FIGURE 10.
DISHWASHING MACHINES
CLOSED WATER SYSTEMS
THERMAL EXPANSION
HOT WATER
OUTLET
12" TO 15"
(30-38 cm)
CHECK
VALVE
MIXING
CHECK
VALVE
VALVE
TO TANK
INLET
TEMPERATURE-PRESSURE RELIEF VALVE
14
Explosion Hazard
Temperature-Pressure Relief Valve
must comply with ANSI Z21.22-
CSA 4.4 and ASME code.
Properly sized temperature-
pressure relief valve must be
installed in opening provided.
Can result in overheating and
excessive tank pressure.
Can cause serious injury or death.