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Power Circuit Breaker & Reset Button
The power circuit breaker and reset button are located behind the heater top front
panel.
POWER Circuit Breaker: Turns ON the heater's internal 240 VAC power supply.
RESET Button: Non-illuminating red push button used to clear a lockout condition.
To Turn the Heater ON – Lighting Instructions
The following procedure assumes any external controlling devices are all in the ON position
and that the 'POWER' circuit breaker located behind the heater upper front panel is also in the ON
position.
If you smell gas do not attempt to turn ON the heater.
1.
Switch ON the electrical supply at the electrical isolator located adjacent to the heater.
2.
Turn ON the gas supply at the gas isolating valve located adjacent to the heater.
3.
Switch the ON/OFF switch located on the indicating light panel to the ON position.
4.
If not controlled by the heater, ensure system circulating pump P2 is operating.
5.
Adjust the system setpoint to the desired water temperature setting (refer to
the System Setpoint'
6.
If an indirect DHW tank is also installed (H models operation mode 2 or 3 only), adjust the indirect
DHW setpoint to the desired water temperature setting (refer to
DHW Setpoint'
on page 84).
The heater will automatically operate to heat the water to the desired setpoint temperature(s) provided
there is correct water flow through the heater.
To Turn the Heater OFF
1.
Switch the ON/OFF switch on the indicating light panel to the OFF position.
2.
To isolate the power supply to the heater, switch OFF the heater's electrical supply at the electrical
isolator located adjacent to the heater.
3.
To isolate the gas supply to the heater, close the heater's gas isolating valve located adjacent to
the heater.
4.
To isolate the water supply to and from the heater, close the water isolating valves at the heater's
water inlet and water outlet.
To Reset the Water Heater
If the water heater is in lockout, this could be an indicator of a dangerous situation. A lockout condition
is indicated by the red 'Service Required' LED on the front of the water heater and also the red flashing
TM
LED on the PIM
and the cause will be displayed on the touch screen interface. If this occurs, the
ignition system can be reset as follows:
•
Press and hold the reset button for approximately 1 second (the red LED light should extinguish).
•
The water heater will attempt to re-light following the pre-purge operation.
If the water heater still fails to operate, call your nearest Rheem Service Department to arrange for an
inspection.
on page 83).
'Raising or Lowering the Indirect
82
'Raising or Lowering
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