Potterton Housewarmer 45 Installation & Service Instructions Manual page 9

3. Installation Requirements – Page 9
F ully P umped
S ealed S ystem
Pressure
Gauge
Safety
Valve
Expansion
Vessel
Fig. 6
F illing A Sealed W ater S ystem
(Method 1)
Mains T opping-U p Method
Note: This Method Of Filling A
Sealed System May Only Be
Used If Acceptable To local
Water Undertaking
Hose
Union
Mains Water
Supply
(Service Pipe)
BB45008A
Alternative By-pass
arrangement Using
The Bathroom
Radiator Fitted With
Two Lockshield Valves
Filling
Point
By-pass
Balancing
Valve
Temporary
Hose
Stop
Valve
Double
Check
Valve
Heating
System
Fig. 7
Optional
3 Port
Vent
Valve
Optional
Zone
Valves
F illing A Sealed W ater S ystem
(Method 2)
Cistern F illing Method
Note: Cistern To Be Supplied
Through A Tempory Connection
From A Service Pipe Or
Cold Water Distributing Pipe
Overflow
Cistern
BB45009A
Make Up
Vessel
Return
BB45007A
Mains
Water
Supply
Pressure Pump
Reducing Valve
(If Required)
Stop
Valve
Heating
System
Flow
Fig. 8