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INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH
29
FILLING THE SYSTEM
FILLING THE SYSTEM
8-716-106-256a (08.05)
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 header tank and allow the system
to fill.
2 Sealed systems only;
Fill the system to between 1 and 2 bar
pressure via a WRAS approved filling link.
Check the expansion vessel pressure and
adjust if necessary using the Schrader type
valve.
3 Vent all radiators, retighten when completed.
Bleed air from the secondary heat exchanger
using the manual air vents.
Check the system and rectify any leaks.
1 - 2 bar
3
1
2
