FILLING THE SYSTEM
1 Ensure all system and boiler drain points are
closed.
2 If connected to an open vented system turn
on the water supply to system header tank
and allow to fill the system.
3 For sealed systems fill the system using a
WRAS approved filling loop to a pressure of
1 bar.
4 Vent (A) any air from the boiler heat
exchanger using a suitable container to
collect any water. Ensure tube outlet (B) is
directed away from the fan or any other
electrical component to prevent any water
damage. Also place a suitable cover over
the fan to prevent any spillage of water onto
electrical connections.
Ensure the cover is
removed after venting.
5 Vent all radiators and primary side of the hot
water cylinder.
GAS SUPPLY
Open gas cock on the boiler and purge the
gas supply to the boiler ensuring that the
room is well ventilated.
Test for gas supply for soundness as
described in BS 6891.
4
A
B
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR Ri
8 716 115 168a (06/2008)
27
FILLING THE SYSTEM
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