6
Standby mode
The water heater will be in Standby mode whenever conditions are not favourable for solar heating in Normal
operation, and Over-temperature operation and Night Time Cooling are not required or have been completed,
and conditions are not cold enough for or in-between Freeze Protection operation.
Solar Monitor LED operation
The LEDs on the Solar Monitor, located on the side of the solar control unit, operate to show the operational
mode of the water heater. Refer also to
on page 9.
Mode
Green LED
Red LED
power on* > 48 hours power on* < 48 hours
Normal operation
rapid pulse
3 flashes
off **
Over-temperature operation
rapid pulse
3 flashes
off, or solid then off
Night Time Cooling operation
rapid pulse
3 flashes
off
Freeze Protection operation
rapid pulse
3 flashes
off
Standby mode
solid
slow pulse
off
Notes
* Power from the GPO to the solar control unit.
** In Normal Operation the red LED may emit a rapid pulse for a short period of time under certain
circumstances (refer to
on page 20).
HOW HOT SHOULD THE WATER BE?
The solar control unit will circulate water through the solar collector(s)
until a temperature of 70°C to 80°C is reached in the solar storage
tank.
During periods of low solar energy gain, the continuous flow in-series
gas booster will boost the water temperature automatically to its
preset outlet temperature setting, or to the temperature setting of
another type of in-series booster water heater.
The factory preset outlet temperature setting of the in-series gas
booster is:
874 series 20 litre, 26 litre, 27 litre models
60°C
Note:
The preset outlet temperature setting of a continuous flow in-
series gas booster cannot be adjusted by the householder. The
setting can only be adjusted by the installer, Rheem Service or their
nearest Accredited Service Agent.
Note:
AS 3498 requires that a water heater provides the means to inhibit the growth of Legionella bacteria in
potable water. If this water heater is installed with an in-series continuous flow gas booster, then this
requirement of AS 3498 can be satisfied provided the booster is energised, its preset outlet temperature setting
is 70°C or higher and a remote temperature controller or an EZiSET kit is not used.
If this water heater is installed with an in-series storage booster, then this requirement of AS 3498 can be
satisfied provided the storage booster is energised and its thermostat setting is 60°C or higher.
Warning:
Temperature controllers or an EZiSET kit
must not
be fitted to the in-series water heater as part
of a solar water heater system because water at a temperature much higher than the controller or EZiSET
setting can be delivered.
typical maximum
temperature from solar gain
maximum recommended
supply temperature to
bathrooms and ensuites
