Rheem 310 - Draining the Water Heater

COMMISSIONING
41
Notes
Power must be available at the water heater and to the heat pump for the LEDs to glow or flash.
Solid Red or 3 x Red Flashes (Green LED Off) – If the power supply to the water heater is on and the
green LED is off and the red LED is emitting a solid glow or three (3) flashes, this does not necessarily
mean there may be a fault with the water heater but is indicating the water heater is operating outside of
the heat pump‟s operating range. The heat pump‟s operating range is when the ambient air temperature
is 5°C or higher. Refer to “Heat pump operating range” on page 14 in the “Save A Service Call” section
of this Owner‟s Guide.
1 x Red Flash (Solid Green LED) – If the green LED is emitting a solid glow and the red LED is
flashing a single flash, this does not necessarily mean there may be a fault with the water heater. Refer
to “Red and Green LEDs Are Illuminated” on page 16 in the “Save A Service Call” section of this
Owner‟s Guide.
Other Red Flash Sequences – If the red LED emits a series of flashes other than three (3) flashes
(green LED off) or a single flash (green LED solid glow), there may be a fault with the water heater.
Before phoning to arrange a service inspection due to the red LED flashing or the green LED not
illuminating refer to “Heat Pump Is Not Operating” on page 14, “Green and Red LEDs Are Not
Illuminated On Operating Mode Monitor” on page 15, and “Red LED is Illuminated – Green LED is Off”
on page 15 in the “Save A Service Call” section of this Owner‟s Guide.
DRAINING THE WATER HEATER
Warning: Exercise care, as water discharged from the water heater may be of a very high temperature.
To drain the water heater:
Turn off the water heater (refer to “To Turn Off The Water Heater” on page 39).
Close all hot water taps.
Operate the relief valve release lever - do not let the lever snap back or you will damage the valve seat.
Operating the lever will release the pressure in the water heater.
Undo the union at the cold water inlet and attach a hose.
Let the other end of the hose go to a drain.
Operate the relief valve again.
This will let air into the water heater and allow the water to drain through the hose.