OPERATING THE BOILER
FILLING LINK: Sealed systems only
A filling link consists of two manually operated valves and a flexible pipe that allows water to be
added to the system when the valves are opened. This device must only be connected when topping
up the system and disconnected when not in use.
If the sealed system pressure within your system drops to below 0.5 bar (shown on the pressure
gauge) you will need to increase the pressure to ensure your boiler continues to run without
problems.
Your installer should have informed you where to find the filling system and instructed you in its use.
To increase the pressure follow these instructions:
1. A pressure gauge should be visible from the filling link.
2. Connect the flexible hose across the two valves, one leading from the boiler and the other from the
mains water supply. The connecting nuts need only to be hand tight.
3. Slowly open both valves ensuring that water does not leak from either end of the flexible hose.
4. You will hear water passing through the hose and valves and the grey needle on the pressure
gauge will rise.
5. When the needle rises to between 1 and 1.5 bar close both valves, the needle should now remain
at that pressure.
6. The hose should then be disconnected from at least one valve, a small amount of water will flow
from the hose, this is normal. If water continues to flow from the hose then the valve has not been
fully closed or is faulty. If it is faulty you will need to contact your installer to resolve the problem.
OPERATING THE BOILER
GREENSTAR HEATSLAVE EXTERNAL 12/18 - 18/25 - 25/32
8 716 113 390e (03.2010)
7
USING YOUR
BOILER
