Save A Service Call - Rheem 864 Series Owner's Manual And Installation Instructions

Check the items below before making a service call. You will be charged for attending to any condition or fault,
°C
8 8
which is not related to manufacture or failure of a part (refer to
10L
X
NO DISPLAY ON THE CONTROLLER

Is the controller turned on?
Press the on / off ( ) button (refer to

Is the water heater plugged in and the power outlet switched on?

Is power available in the house?
°C
8 8
Try using another electrical appliance.
10L
X
COLD WATER FROM THE HOT TAP

Is the controller turned on?
Press the on / off ( ) button (refer to

Close the hot tap, wait 10 seconds and open the hot tap again.

Is the hot tap open enough?
The burners will not light if the flow rate is less than 2.0 L / min.

Is the water heater plugged in and the power outlet switched on?

Is power available in the house?
Try using another electrical appliance.

Is the isolation valve in the gas line open?

Is there a gas supply to the rest of the house?
Try lighting another gas appliance.

Has the gas line been purged of air after installation?
Refer to your plumber.
WATER IS TOO HOT OR NOT HOT ENOUGH

Does the controller you are using have priority? (refer to
Note: For an 866 series water heater, 50°C is the maximum available temperature setting.
REDUCED HOT WATER FLOW WHEN HEAT EXCHANGER IS COLD
At a cold start-up, i.e. when the water heater has not operated for some time (which is most often first thing in
the morning), the initial flow of hot water may be reduced for a period of 5-10 seconds while the heat exchanger
warms up. This is both an energy and water saving feature of this water heater. Once the heat exchanger
has warmed up the hot water flow will increase and remain at normal flow levels. This feature will only occur
at a cold start-up and not when the heat exchanger is already warm from a recent use of hot water.
WATER FLOW FLUCTUATES
More than two or three taps in use at the same time may cause a decrease in the hot water flow from the taps.
This can also be evident if the water heater has been installed as an in-series gas booster to a solar water
heater and the solar heated water is at a low temperature.

Are there more than two or three taps open, or are appliances such as a dishwasher or washing machine,
in use at the same time?
Ensure only two or three taps or appliances are on at the one time.

Check the flow of the water from one tap, e.g., the shower.
The shower should be adjusted so the hot tap is fully open.

SAVE A SERVICE CALL

"Temperature Control"
"Temperature Control"
42
"Terms of the Rheem Warranty"
on pages 11 to 40).
on pages 11 to 40).
"Temperature Control"
on pages 11 to 40)
on page 102).