Commissioning - Heatrae Sadia Multipoint 30 Installation And User Instructions Manual

4.0 COMMISSIONING

4.1 PLUMBING
4.1.1 Do not switch on the electrical supply until the unit has been filled
with water and checked for leaks.
4.1.2 Check that all installation, electrical and discharge pipe
requirements have been met.
4.1.3 Check that all water and electrical connections are tight.
4.1.4 Open a hot water tap, turn on mains water supply to the heater.
4.1.5 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.
4.1.6 Manually test the operation of the Temperature/Pressure Relief
Valve and, if fitted, the Pressure (expansion) Relief Valve.
Ensure water flows freely from the valve(s) and through the
discharge pipes.
4.2 ELECTRICAL
4.2.1 Switch on the electrical supply. The indicator light will illuminate
during heating. When the set temperature is reached the indicator
light will go out.
4.2.2 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 7.9 or 7.10 below.. Always switch off the electrical supply before
removing the terminal cover.
4.2.3 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.
4.2.4 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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