Rinnai HD70e Installation And User Manual page 22

TEMPERATURE CONTROLS - OPERATING
Using 4 Universal Temperature Controllers.
You will need to activate the fourth controller.
STEP 1:
On the Master controller press and hold the Transfer and On/Off buttons
simultaneously (see fig 2.) until a "beep" is heard (approx. 5 seconds)
Check that the display on all Four controllers is lit
STEP 2:
and displaying a temperature when switched on. If
any ONE of the controllers displays two dashes (see
fig 1.) in the display repeat STEP 1.
Note:
If the master controller is replaced, repeat STEP 1 above for the new controller.
ON
Fig 2.
22
Fig 1.