OVERVIEW OF OPERATION
PRESSURE
GAUGE
REGULATOR
RINSE ARM
CHECK VALVE
WASH TANK
WATER LEVEL
PROBE WL
THERMOSTAT TS 
WASH TANK
COILS T
WASH TEMP
(65.56 - 73.89 °C)
RECIRCULATING
PUMP
VACUUM BREAKER
FILL / RINSE SOLENOID
TRINSE TEMP >180 °F (82.22 °C)
CHECK VALVE
BOOSTER
TANK
ECO
HEAT
EXCHANGER
BURNER
ASSEMBLY
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MODULATING | COMBINATION GAS | ||||||||
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| CUTOFF VALVE | ||||||
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The Tempstar TGP heating system is designed to heat and maintain the wash tank water temperature at a minimum of 150 °F (65.56 °C) as well as providing a constant 180 °F (82.22 °C) rinse water temperature. Incoming water is supplied at a pressure of 20psi and between
When the power is turned on at the ON/OFF switch the water level control board will sense a low water level in the wash tank and the unit will begin to fill. This occurs as the rinse solenoid valve opens, allowing connected water to fill the booster tank, heat exchanger and the rest of recirculating system, once the booster tank is full, water will fill the wash tank until the water level control sys- tem is satisfied. Simultaneously with the fill, the rinse recirculating pump and the gas burner assembly is energized, to begin heat up of the unit. A transformer in the main control box supplies +12vdc to the electronics control drawer location in the lower section of the unit. The electronics control board (ECB) is the brain of the system. The ECB receives various inputs and determines the amount of heating required.
When energized the ECB receives input from the
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