4
35-44kW
Automatic
air vent
Pressure relief
valve
CH flow
CH return
Filling loop
valve
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 PART 1, EN 12828:2003 AND ANy OTHER RELEVANT
STANDARDS &REgULATIONS.
* * 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.
4
4.2 systeMPaC - installeR guiDelines
24
Filling looP
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 oil 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.
