Rheem PowerVent Series Technical Service Bulletin

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S O
EQUENCE OF PERATIONS
This is a power vent water heater control that provides two way communications to a wired user
display. The word 'control' in this sequence will refer to the gas control valve.
Communication between the control and the user display is achieved through a communications
port powered by a 24V transformer. Inputs include water
heater setpoint, water heater mode of operation, error
codes, and diagnostics. Outputs include status (mode,
temperature, available hot water, diagnostics and error
codes). User display will be packaged with the water
heater.
The user display has a backlight that comes on during
interaction with the display for a minimum of 8 seconds.
The display is connected to the water heater with 3-wire
thermostat wire with a maximum length of 100 feet.
Tank is full of water.
Gas supply is connected.
Unit is plugged into a 3-
prong plug wall socket 120
VAC.
Turn rocker switch on the
blower to ON position.
Slide gas control valve to
the ON position.
Each time the controls are
powered up they test the
random access memory
(RAM), the program code
and the non-volatile
memory (EEPROM).
1622.docx
TECHNICAL SERVICE DEPARTMENT
Technical Service Bulletin
PowerVent with Electronic Control Sequence of Operations
Fill tank.
Connect gas at 7" w.c for
natural; and 10" w.c. for LP.
Electrical socket must be
wired polarity correct with
an earth ground. Black wire
to brass screw; white wire to
silver screw; green wire to
ground.
Blower motor rocker switch
controls all power inputs to
blower motor, gas valve and
display.
At power ON and a demand
for heat, the control performs
a self-test diagnostic routine.
If the self-check fails, the
control locks out with
indications on the control
and user display.
1-800-432-8373
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