Hamworthy Purewell VariHeat he Installation, Commisioning And Maintenance Instructions page 54

Figure E1.2 - Typical Piping Layouts
Expansion pipe
Float
valve
Mains wat er
Feed &
expansion
tank
Hamworthy Modular Boilers
Feed
T
pipe
VENTED SYSTEM: Primary loop, Hamworthy recommended system.
Mains water
Lockshield
valve
Lockshield
valve
Lockshield Temporary Double
valv e
UNVENTED SYSTEM: Primary loop, Hamworthy recommended system .
Expansion pipe
Float
Val v e
valve
Mains water
Feed &
expansion
tank
Feed
pipe
VENTED SYSTEM: Single pipe header
Mains water
Lockshield
valve
Lockshield
valve
Lockshield Temporary
valv e
UNVENTED SYSTEM: Single pipe header
HAMWORTHY HEATING LTD
Pressure &
Temperature
Drain
gauges
P T
Safety
valve
Module Module Module
1 2 3
Circulation pump
(Primary loop)
Automatic
Air Vent
Expansion
vessel
Drain
valve
check
fill line
valv e
Drain
Safety
valve
Module Module Module
1 2
Hamworthy Modular Boilers
Circulation pump
(Primary loop)
Automatic
Air Vent
Expansion
vessel
Drain
valve
Double
check
fill line
valv e
Valve
Circulation pump
(System)
Valve
Drain
valve
Drai n
Safety
valve
Valv e
Module Module Module
1 2
Hamworthy Modular Boilers
T
Circulation pump
(Primary loop)
Pressure &
Temperature
gauges
T
P
Valve
Circulation pump
(Sys tem)
3
Valve
Drain
valve
Drain
Safety
valv e
Valv e
Module Module
1 2
Hamworthy Modular Boilers
Circulation pump
(Primary loop)
49
PUREWELL VariHeat he
Pressure &
Temperature
P
T gauges
Valve
Circulation pump
3
(Sys tem)
Valve
Drain
valve
Pressure &
Temper ature
gauges
P
T
Valve
Circulation pump
(System)
Module
3
Valve
Drain
valve
Automatic
Air Vent
Heating load
Automatic
Air Vent
Heating load
Automatic
Air Vent
Heating load
Automatic
Air Vent
Heating load
500001155/F