HAMWORTHY HEATING LTD. PUREWELL PERMANENT IGNITION 500001090/B
20
Figure No. 8 – Typical Boiler Installations
Expansion pipe
valve
Safety
Drain
Feed
pipe
valve
Feed &
expansion
tank
(
alternative
(
valve
Drain
position
Circulation pump
P
gauges
Pressure &
Temperature
T
Valve
Mains water
Float
Automatic
Air Vent
Hamworthy Modular Boilers
1
2
3
Circulation pump
Heating load
Valve
'Marshall HE’ Water Flow
Temperature Sensor
Temperature Sensor
'Marshall HE’ Outside Air
Temperature Sensor
'Marshall HE’ Room
Circulation pump
Temperature Sensor
'Marshall HE’ Outside Air
'Marshall HE’ Room
Temperature Sensor
Temperature Sensor
'Marshall HE’ Water Flow
Circulation pump
Hamworthy Modular Boilers
1
2
3
Temperature
Pressure &
Safety
valve
Drain
P
gauges
T
(
alternative
(
position
Valve
Heating load
Valve
Air Vent
Automatic
valve
check
Double
fill line
Temporary
Air Vent
Automatic
valve
Lockshield
Mains water
Lockshield
valve
Pressurisation
Hamworthy
Unit
Expansion
Valve
Lockshield
Lockshield
valve
valve
Drain
valve
VENTED SYSTEM: Reverse return pipework, Hamworthy recommended system.
Heating load
Air Vent
Automatic
Valve
Circulation pump
Hamworthy Modular Boilers
1
2
3
Drain
valve
Safety
Temperature
P
gauges
Pressure &
valve
Drain
Temperature Sensor
'Marshall HE’ Outside Air
Temperature Sensor
'Marshall HE’ Water Flow
Temperature Sensor
'Marshall HE’ Room
position
alternative
Circulation pump
(
(
Valve
Lockshield
valve
Drain
valve
Pressurisation
Hamworthy
Unit
fill line
Temporary
Expansion
Air Vent
Automatic
Valve
valve
check
Double
valve
Lockshield
Lockshield
valve
valve
Lockshield
Mains water
UNVENTED SYSTEM: Single pipe header
UNVENTED SYSTEM: Reverse return pipework, Hamworthy recommended system.
T
Circulation pump
Temperature Sensor
Temperature Sensor
'Marshall HE’ Outside Air
'Marshall HE’ Room
Temperature Sensor
'Marshall HE’ Water Flow
VENTED SYSTEM: Single pipe header
Feed
pipe
Hamworthy Modular Boilers
Circulation pump
1
2
3
Mains water
Expansion pipe
Feed &
expansion
tank
valve
Float
Pressure &
Temperature
Safety
valve
Drain
P
gauges
T
(
(
alternative
position
Valve
Drain
valve
Heating load
Valve
Air Vent
Automatic
Valve
T
T
‘Marshall HE’ Boiler Sequence
Control System
Control System
‘Marshall HE’ Boiler Sequence
‘Marshall HE’ Boiler Sequence
Control System
Control System
‘Marshall HE’ Boiler Sequence