Rheem 874 Owner's Manual And Installation Instructions page 13

TEMPERATURE ADJUSTMENT – STANDARD CONTROLLER
A controller must be on and have priority to be able to adjust the temperature setting.
The temperature adjustment is made by pressing the up () button or down () button.
The maximum temperature setting for the controllers are:
Each press of the up () button will increase the temperature setting by one increment.
Pressing and holding the up () button will scroll the temperature setting up to a maximum 43 C if there
is hot water flowing or 45 C if there is no hot water flowing.
From the 45 C setting, the up () button must be pressed once for each increase in temperature
increment.
The temperature setting cannot be increased above 43 C whilst hot water is flowing.
The minimum temperature setting for each type of controller is 37 C.
Each press of the down () button will decrease the temperature setting by one temperature increment.
Pressing and holding the down () button will scroll down the temperature setting.
The temperature setting can be decreased from any temperature setting whether the hot water is flowing
or not.
Kitchen
874 series 55°C
872 series 55°C
13
TEMPERATURE CONTROL – STANDARD
Bathroom
50°C
50°C