FILLING THE SYSTEM
The unit comes with a factory fitted expansion vessel.
Should the total water volume of the system exceed the
expansion provided, a second vessel should be added (see
below table).
Expansion Vessel and System Requirements
Safety Valve Setting 3 bar
Initial System Pressure
0.5 bar 1.0 bar 1.5 bar
Total Water Content
of System
Total Vessel Volume **
Litres Litres Litres Litres
25 2.1 2.7 3.9
50 4.2 5.4 7.8
75 6.3 8.2 11.7
100 8.3 10.9 15.6
125 10.4 13.6 19.5
150 12.5 16.3 23.4
175 14.7 19.1 27.2
200 16.7 21.8 31.2
225 18.7 24.5 35.1
250 20.8 27.2 39.0
FOR FURTHER INFORMATION, CONSULT APPROPRIATE TRAINING
MANUALS, BS 7074-1: 1989, EN 12828: 2012 + A1: 2014 AND ANY OTHER
RELEVANTSTANDARDS®ULATIONS.
* * When calculating the size of any additional expansion
vessel, remember to deduct the boiler expansion vessel volume
of 12 litres from the calculated total system vessel volume
required, as given in the above table.
FILLING LOOP
The diverter valve is factory set to “control heating mode” to
facilitate system filling.
Connect the filling loop. Open both valves. Do not allow the
unit to exceed 1 bar while filling and a maximum of 2 bar
when the radiators are at full operating temperature. The
automatic air vent will allow air to dispel from the boiler. To
remove air from the storage tank, the manual air vent must
be operated. When the system is full, turn off both valves
and disconnect the filling loop.
CONNECTING LIQUID FUEL SUPPLY
Using the flexible hose provided, connect the burner to
the incoming oil line which must have a remote acting fire
valve. The flexible hose must be contained within the
appliance casing.
3 3.2 COMBI HE & COMBIPAC HE - INSTALLER GUIDELINES
THERMOSTAT TEMPERATURE CONTROL
Boiler Central Heating Control: 60˚C - 80˚C
Boiler Safety Limit: 110˚C
Tank (DHW) - Fixed: 78˚C
Early Alert - Fixed 87˚C
Over-run - Fixed: 93˚C
The Combipac HE has a build in frost protection (unit only).
WIRING
Electrical Supply
The boiler and controls require a 230V 50Hz mains
electric supply protected with a 5A fuse.
This appliance must be earthed.
A qualified electrician must carry out all electric wiring in
accordance with current ETCI / IET Regulations and any local
regulations which may apply.
The boiler must have a permanent power supply to enable
overrun and frost protection. The hot water and central
heating should be timed separately.
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