Instruction manual

14 Open all system and radiator valves.
4 Turn on the water main stop cock.
4 Open vented systems only:
4 Turn on the water to the system feed and
expansion cistern and allow the system to
fill.
24 Sealed systems only:
4 Check and if required, adjust the expansion
vessel pressure using the Schraeder type
valve (C).
4 Fill the system to between 1 and 2 bar
pressure via a WRAS approved filling link.
4 Monitor the pressure gauge during venting
and repressurise if required.
34 Vent all radiators, retighten when completed.
4 Chec
k the system and correct any leaks.
4 Bleed air from at least one of the secondary
heat exchanger air vents (a radiator key is
ideal for this). There are two venting
bosses (A) on the top of the secondary
heat exchanger. Only one is used if fluing
to the side. The (A) in use and (B) must be
bled.
4 Bleed air from the primary heat
exchanger air vent (B).
FILLING THE SYSTEM
2
1
3
1 - 2 bar
A
A
B
C
F
I
LLING THE SYSTEM
I
N
S
TALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR CAMRAY EXTERNAL 12/18-18/25-25/32
8 716 112 700a (02.07)
30
COMMISSIONING