Megalife Product Guide
12
7: Installation - User Instructions
7.1 Temperature Control
Solar Primary Circuit
Temperature control when heating by the solar primary circuit will be controlled by the external solar differential
temperature controller. The controller should be set to give a water storage temperature of approx. 60
o
C, however it can
be set to other temperatures. This will usually have been done during installation. A maximum of 70
o
C is recommended
to avoid nuisance operation of the thermal cut-outs fitted to the unit. Adjustment is made at the solar differential
temperature controller, refer to the manufacturer’s instructions for details of how to make any adjustments.
Changes to the operating temperature differential set points can affect the efficiency of the operation of the solar
heating circuit, it is recommended that any changes made are carried out by a competent solar water heating
installation engineer.
Immersion Heaters
A combined thermostat and thermal cut-out is provided for each immersion heater. The thermostat is factory set
to give a water storage temperature of approx. 60
o
C, however it can be set to control between 10
o
C and 72
o
C. This
will usually have been done during installation. Adjustments can only be made by opening the terminal cover(s),
DO NOT remove the cover(s) without first switching off the electrical supply.
The temperature adjustment is
made by inserting a flat bladed screwdriver in the slot in the spindle on top of the thermostat and rotating (see Fig.
05, page 9).
If in any doubt consult a competent electrician.
Auxiliary Heating Coil
All units are fitted with an indirect thermostat. The thermostat is factory set to give a water storage temperature
of approx. 60
o
C, however it can be set to control between 10
o
C and 72
o
C, this will usually have been done during
installation. Adjustments can only be made by opening the terminal cover.
DO NOT
remove the cover without
first switching off the electrical supply
. Temperature adjustment is made by inserting a flat bladed screwdriver in
the adjustment spindle located on the front of the thermostat mounting bracket (see Fig. 05, page 9) and rotating.
At the minimum position the temperature will be approx. 10
o
C.
If in any doubt consult a competent electrician.
DO NOT
bypass the thermal cut-out in any circumstances.
7.2 FLOW PERFORMANCE
As with any cistern fed vented system the pressure obtained at the outlet points is due to the height (head) of the
cold water fed cistern above the outlet. Outlet points with a low head may give lower flow rates than those located at
a lower level within the property. When several hot outlets are opened simultaneously some loss of flow from outlets
with a low head or located some distance from the Megalife solar may occur. This a function of the system design
and does not necessarily indicate a fault with the water heater.
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