Thermaflow TH12 - THERMAL INNOVATIONS (UK) LTD | THERMAFLOW ELECTRIC COMBINATION BOILER | Tel: 0870 850; Domestic Hot Water Flow Rate; Temperature Settings; Heating System Commissioning

THERMAL INNOVATIONS (UK) LTD | THERMAFLOW® ELECTRIC COMBINATION BOILER | Tel: 0870 850 5207
22
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 150 KPA (1.5 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 60oC but is user adjustable by altering
the setting on the hot water mixing valve on the boiler.
The maximum flow temperature setting for central heating is 82oC this is the preset and is not
adjustable.
2.7.5 Heating system commissioning
Make sure the boiler and heating system is completely full of water. (SEE ABOVE SECTION 7.2)
Turn on both 24Hr & Interrupted power supplies. Allow approximately 120 - 200 minutes to bring the
boiler up to temperature (depending on model). Check that all external controls, are calling for heat.
Fully open all thermostatic and lock shield valves on each radiator.
Set the aqua stat, positioned at the bottom of the boiler to 30ºC (It must remain at this setting)
Allow this system to reach maximum temperature then switch off both electrical supplies at the
isolators. Drain the system rapidly while still hot.
Fill and vent the system as described in section 7.2 “Filling the central heating circuit” Add inhibitor as
required refer to section 3.8 “Corrosion Inhibitor”
Set to the initial cold fill design pressure, using the external draining tap. Refer to table 1, and section
3.9