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4.0 COMMISSIONING
DO NOT SWITCH ON THE ELECTRICAL SUPPLY UNTIL THE UNIT HAS
BEEN FILLED WITH WATER AND CHECKED FOR LEAKS.
4.1 PLUMBING
1. Check that all installation, electrical and discharge pipe requirements
have been met.
2. Check that all water and electrical connections are tight.
3. Open a hot water tap, turn on mains water supply to the heater.
4. Allow unit to fill and leave hot tap running for a short while to purge any
air and flush out the pipework. Close the hot tap and check the system
for leaks.
4.2 ELECTRICAL
1. Switch on the electrical supply. The indicator light will illuminate
during heating. When the set temperature is reached the indicator
light will go out.
2. The set temperature can be adjusted by rotating the knob located in
the terminal cover. It is possible to lock the thermostat knob in either
the mid-range or a "hot" position by following the procedures in 4.2.3
or 4.2.4 below. Always switch off the electrical supply before removing
the terminal cover.
3. Setting the "mid-range" position:
Rotate the thermostat knob to the mid position. Remove the terminal
cover by using a large flat bladed screwdriver to depress the four snap
lugs located in the four rectangular depressions on the bottom cover.
Holding the thermostat knob in position turn the terminal cover over
and remove the backing disc from the underside of the cover. Turn the
backing disc over and refit to the knob ensuring the notch locates with
the boss on the underside of the cover. Refit the terminal cover, the
thermostat will now be locked in the "mid-range" position.
4. Setting the "hot" position:
Rotate the thermostat knob to mid way through the hot graduated range
(red graphic). Follow the procedure detailed above, however in this case
the knob should be held in the "hot" position previously set. When the
terminal cover has been refitted the thermostat will be locked in the
"hot" position. This position is recommended when using the heater in
conjunction with a thermostatic blending valve.
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