Filling The System - Worcester GREENSTAR UTILITY 18/25 Instruction Manual

8 716 106 256 C 03.10 30/3/10
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR DANESMOOR UTILITY 18/25
8 716 106 256C (03/2010)
14:24 Page 31

FILLING THE SYSTEM

1 Open all system and radiator valves.
Turn on the water main stop cock.
Open vented systems only:
Turn on the water to the system feed and
expansion cistern and allow the system to
fill.
2 Sealed systems only:
Check and if required, adjust the expansion
vessel pressure using the Schraeder type
valve.
Fill the system to between 1 and 2 bar
pressure via a WRAS approved filling link.
Monitor the pressure gauge during venting
and repressurise if required.
3 Vent all radiators, retighten when completed.
Check the system and correct any leaks.
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.
FILLING THE SYSTEM
31