Page 17
Setting Water Temperatures
Apollo GEM can use one of two methods to control the water temperature:
Using the electric water element thermostat (standard system), or Using the optional Apollo GEM
tank temperature sensor.
Each output can be programmed to use either method, or no temperature control.
The method used for temperature control of each output is set in the installer part of the set-up
menu.
Using the optional tank temperature sensor has a number of advantages over using the normal
electric water element thermostat:
Tank temperature display The home display screen will show a continuous reading of the
current hot water temperature.
Better temperature control Water temperature is more accurately controlled than with the
electric water thermostat
Programmable temperature The hot water temperature can be programmed from the Apollo
GEM unit.
Multiple temperatures Different temperatures can be set depending on whether the water
is being heated by on-site generated energy or imported energy.
This enables the cost of timed water heating to be minimised whilst
maximising available free energy from the generation system
The tank temperatures are set using set-up screen 4:
If there is no temperature sensor installed the temperature is controlled by the heater
thermostat and the temperature set in this screen will have no effect.
Apollo GEM
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