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7.1 Temperature Control
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.
04 page 9).
If in any doubt consult a competent electrician.
Primary Heating Coil
Indirect units are fitted with an indirect thermostat which controls a 2-port motorised valve, hence the temperature
of the water in the Megalife unit when heated using the auxiliary heating coil. 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. 04, page 9) and rotating.
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 may occur. This is a function of the system design and
does not necessarily indicate a fault with the water heater.
7: Installation - User Instructions
