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2.6.7 Supply cable connection [Interrupted off peak supply]
Open the lower of the two enclosures situated at the top of the boiler.
Using 16mm² twin and earth cable of a suitable length route the mains interrupted supply cable through
a piece of suitably sized flexible conduit from the 60amp isolator into the terminals shown in diagram 5.
Standard colours are Brown- Live, Blue- Neutral and the earth should be sleeved with a suitably sized
green and yellow earth sleeve.
Make the earth cable of a greater length so that if the cable is strained the earth would be the last to
become disconnected.
CAUTION: IT IS ESSENTIAL TO MAKE SURE THE POLARITY IS CORRECT.
2.6.8 Electrical Test
Carry out preliminary electrical system check as below:
1) Test insulation resistance to earth, of mains cables.
2 Test earth continuity and short circuit of all cables
3 Test the polarity of the mains.
4 Refit the enclosure cover.
Electricity tariffs
The Thermaflow will operate on any ~230-240V, 50Hz supply. The most economical option is a peak
avoidance tariff as described previously.
Scottish Power, Eastern Energy, Guernsey Electric North Eastern Electricity all has an 18 hour tariff.
Other areas offer their own tariffs, which may be viable for economic operation.
2.7 Commissioning
2.7.1 Filling domestic water circuit
Check that the boiler is isolated from the electrical supply, at both external isolators.
Fully open the domestic water supply stop cock or valve in the supply to the boiler.
Open all hot water draw-off taps and close them when water flows. Check for water soundness of the
whole domestic hot water installation and boiler.
2.7.2 Filling the heating system
Flush, fill and vent the system refer to section 3.7 “Filling sealed systems”.
The boiler and central heating system should be completely filled and purged of air before switching on the power
to the appliance. The cold fill pressure should register no more than 110 KPA (1.2 Bar). See Table 1.8.1 (DATA),
for minimum and maximum pressures.
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