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3.3 Pumped Heating and Hot Water
It is important the flow and return connections are made as
shown in diagram 3.2.
These connections may be fitted on the opposite side to that
shown but always in the same relative positions.
1metre Min.
27 metres
Max.
PUMP
MIDWAY BETWEEN
BOILER TAPPINGS
FULLY PUMPED CIRCULATION
SYSTEM (DIAGRAMMATIC)
4.1 Unpacking
Unpack and check that the contents, listed below, are present
and undamaged:-
Boiler, combustion chamber shield, side panels x 2, burner,
flueway baffle, loose items pack (with check list).
With the boiler still in the bottom tray, slide the controls cover
upwards and remove as shown in diagram 4.1. Remove the
outer case by undoing, and retaining), the two screws and lifting
off, see diagram 4.1.
CONTROLS COVER
SECURING SCREW
OUTER CASE
CONTROLS COVER &
OUTER CASE REMOVAL
221787B
Supplied By www.heating spares.co Tel. 0161 620 6677
3 Water Systems
22mm VENT &
15mm COLD FEED
TO BE FITTED IN
ACCORDANCE
WITH BS 6798
INDIRECT
CYLINDER
ALTERNATIVE
SYSTEM
CONTROL
VALVES
HEATING
SYSTEM
Diagram 3.2
4 Installation
Diagram 4.1
3.4 Pump
This should be fitted on the flow pipe and have isolating valves
fitted each side, integral, if possible.
The pump should be set to give a temperature difference of
11
o
C (20
o
F) between flow and return, with the boiler thermostat
set at "MAX" which is about 82
The resistance through the boiler can be found from diagram
3.3.
120
100
80
60
40
20
0
5
10 15 20 25 30
0
Flow rate (litres/minute)
PRESSURE
LOSS OF BOILER
Release the wall frame by removing and keeping the two
retaining screws at the back of the combustion chamber, see
diagram 4.2.
To remove the boiler, turn it over, sideways, out of the bottom
tray, see diagram 4.3, taking care not to damage the controls,
so that it is face down on the floor, exposing the four Rc1 (1in
BSP) water connections.
Remove the remaining loose items, including the wall frame
which is in the bottom of the tray.
SECURING BOILER
TO WALL FRAME
8
o
o
C (180
F).
14.7
11.7
8.8
5.9
0
Diagram 3.3
BOILER
SECURING
SCREW(S)
Diagram 4.2
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