THERMAflow Ltd | THERMAFLOW® ELECTRIC COMBINATION BOILER |
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22
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 150 KPA (1.5 Bar).
See
Table 1.8.1
(
DATA), for minimum and maximum pressures.
Make sure the automatic air vent at the top of the boiler is operating correctly.
IMPORTANT!
MAKE SURE THE BOILER AND SYSTEM IS COMPLETELY FULL OF WATER AND ALL AIR IS
ELIMINATED BEFORE TURNING ON ANY OF THE POWER SUPPLIES TO THE BOILER.
Take care not to splash any of the electrical components.
Pressurise the system until the pressure is 120 KPA (1.2 Bar).
Check the heating system and
boiler for
water
soundness.
Check the operation of the safety valve by turning the safety valve knob in the direction of the arrow.
Lower the pressure to the initial cold fill design pressure of 120 KPA (1.2 Bar),
refer to table 1.8.1
. Position
the set pointer on the boiler pressure gauge at this pressure also.
NOTE:
When the boiler reaches its maximum temperature, the pressure will increase to around 200 KPA
(2.0 Bar)
2.7.3 Domestic hot water flow rate
The domestic hot water flow rate can be set by adjusting the stop cock on the cold water inlet to the
boiler.
2.7.4 Temperature settings
The maximum temperature setting for the domestic hot water is pre-set at 50ºC to prevent scalding and is
not user adjustable.
The maximum flow temperature setting for central heating is 82ºC this is the pre-set and is not
adjustable.
