26
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electrical supply. Temperature adjustment is made by inserting a flat bladed screwdriver in the
adjustment knob located on the front of the thermostat mounting bracket (see Diagram 13) and
rotating. At the minimum position the temperature will be approx. 10
o
C. The adjustment range 1
to 5 represents a temperature range of 30
o
to 70
o
C
If in any doubt consult a competent electrician.
DO NOT bypass the thermal cut-out in any circumstances.
8.3 FLOW PERFORMANCE
When initially opening hot outlets a small surge in flow may be noticed as pressures stabilise.
This is quite normal with unvented systems and does not indicate a fault.
In some areas a cloudiness may be noticed in the hot water. This is due to aeration of the water,
is quite normal and will quickly clear.
8.4 OPERATIONAL FAULTS
Operational faults and their possible causes are detailed in Section 10.3, Table 2. It is recom
-
mended that faults should be checked by a competent installer.
The air volume within the expansion vessel will periodically require re-charging to ensure
expanded water is accommodated within the hot water system. A discharge of water INTER
-
MITTENTLY from the Expansion Valve will indicate the air volume in the Expansion Vessel has
reduced to a point where it can no longer accommodate the water expansion.
If after following the above actions water still discharges from the Expansion Relief Valve further
advice should be sought from a competent installer or the Heatrae Sadia service department.
User Instructions
