18
5-5.3 Pump
The Pump is a standard 3 speed central heating circulating pump which pumps the hot
water through the system. The unique design of the Boiler enables the pump direction
to be the same for both left hand and right hand flow connection.
5-5.4 Pressure Gauge
The Pressure Gauge is provided to indicate the system pressure.
When the system is full with cold water and all radiators are full, on and vented, the
gauge will show the cold fill pressure. Set the red pointer to the cold fill pressure. If the
system pressure, indicated by the black pointer, falls below the cold fill pressure, it
indicates that the system requires topping up.
Fig. 5-5b Typical Sealed System
1
2
3, 4
AIR VENT
(NOT SUPPLIED)
DOMESTIC HOT WATER
INDIRECT CYLINDER
FLOW
RETURN
OPTIONAL EXTRA PUMP
ON RETURN FOR
LARGER SYSTEMS
COLD MAINS FEED
7
5
1.
PUMP
2.
PRESSURE GAUGE
3.
PRESSURE RELIEF VALVE
4.
PRESSURE VENT
5.
EXPANSION VESSEL
6.
AIR VENT
7.
FILLING LOOP
Note
No other pump should be fitted to the
system.
2
bar
1
3
4
0
5-5
Option Floor Standing System Boiler - OS60/80, OS80/95, OS90/120, OS100/150
5-5.1 Boiler Arrangement
4
3
1
2
5
COOLED RETURN
EITHER SIDE
HOT FLOW
EITHER SIDE
INTERNAL SEALED PIPEWORK
FOR MINIMUM HEAT LOSS AND
EASY INSTALLATION
1. PUMP
2. PRESSURE GAUGE
3. PRESSURE RELIEF VALVE
4. P.R.V. DISCHARGE (Piped by installer)
5. EXPANSION VESSEL
6. AIR VENT
Fig. 5-5a Schematic Diagram of System Boiler
OS80/95 SHOWN
INST
INST
INST
INST
INSTALLA
ALLA
ALLA
ALLA
ALLATION 5
TION 5
TION 5
TION 5
TION 5
Note
For:-
Service Access .................... see 5-1.1
Heating Connections ........... see 5-1.2
Connecting Control Panel .... see 5-1.3
Oil Connection .................... see 5-1.4
5-5.2 The Heating System
6
6
55555
0
1
2
3
4
5
6
0
20
40
60
80
bar
psi
