Rheem 3805 Series, Owner'S Manual And Installation Instructions, Page: 17 / 28

P a g e | 15
Operation and usage
To Fill And Turn On The Water Heater
NOTE:
The power supply to the water heater must not be switched on until the water heater is filled
with water.

Open all of the hot water taps in the house (don ’ t forget the shower).

Open the cold water isolation valve fully to the water heater.

Air will be forced out of the taps.

Close each tap as water flows freely from it.

Check the pipe work for leaks.

Switch on the electrical supply at the isolating switch to the water heater.

Program the remote controller.
Remote Controller
During normal operation the remote controller display provides real time information such as
current tank temperature and time of day. Additionally, any component or function that is currently
operational such as the fan, compressor, heating element and/or defrost mode will appear as an
icon on the remote display to indicate operation.