Rheem 812 Series Owner's Manual And Installation Instructions page 84

COMMISSIONING
Disconnecting a Temperature Controller(s)
To disconnect the temperature controller(s):
Switch off the electrical supply at the power
1.
outlet to the water heater.
2. Unscrew and gently flip down the electrical
cover on the underside of the water heater.
3. Loosen the terminal screws to release the
cable lugs.
4. Withdraw the cable lugs, ensuring they are
well clear of the terminals.
Note: Prior to the commencement of this
procedure, the preset outlet temperature setting of
the water heater must be set to:
 AU – 50°C for an Australian model 876 series water heater, or

NZ – 55°C for a New Zealand model 874 series water heater.
This procedure cannot be performed if the preset outlet temperature is set below 50°C (AU – 876 series model)
or above or below 55°C (NZ – 874 series model). Refer to
Setting"
on page 81.
Outlet Temperature Adjustment
To adjust the outlet temperature:
Switch on the electrical supply at the power outlet to the water heater.
1.
Locate the first hot tap in the hot water pipe work after the water heater used for personal hygiene
2.
purposes.
3. Turn on the hot tap.
4. Using a thermometer, measure the temperature of the water from the tap, until the temperature stops
increasing.
If the water temperature is:
 AU – below 50°C for an 876 series model, the maximum outlet temperature of the water heater can
be adjusted upwards, or
 NZ – above 55 °C for an 874 series model, the maximum outlet temperature of the water heater can
be adjusted downwards.
Turn off the hot tap.
5.
Switch off the electrical supply at the power outlet to the water heater.
6.
7. Remove the top and bottom cover strips to gain access to the front panel screws by pressing on the two
ridged finger points and gently pulling forward.
8. Remove the screws holding the front panel to the jacket.
9. Gently disengage the front panel and pull forward to remove from the water heater.
10. Switch on the electrical supply at the power outlet to the water heater.
Note: Wait five (5) seconds for the electronic system to initialise.
"To Check or Adjust the Preset Outlet Temperature
84