Supplied By www.heating spares.co Tel. 0161 620 6677
COMMISSIONING AND TESTING
5
5.1
FILLING THE WATER SYSTEMS
29
Before commissioning the appliance, the whole gas installation
including the meter MUST be purged and tested for gas
soundness in accordance with BS 6891:1988.
IMPORTANT:
Open all doors and windows, extinguish naked lights, and
DO NOT SMOKE whilst purging the gas line.
Before commencing the commissioning procedure, ensure that the
gas service cock is turned on, the electricity supply is isolated, and
that the DHW and CH pipework is complete.
A special feature of the Finest and Finest Gold is that the water
systems can be completely filled prior to fitting the boiler. It is
recommended that this procedure is followed even when the
boiler is to be fitted immediately after filling the system.
Fill the water systems by following the procedure detailed below
Fig 29, steps 1 to 5.
CENTRAL
HEATING
RETURN
COLD
WATER IN
CH
DRAIN
FILLING
LOOP
VALVE
CENTRAL
HEATING
FLOW
CAP
•
VALVE POSITIONS FOR COMMISSIONING THE WATER SYSTEM
CLOSED
CLOSED
CLOSED
CLOSED
CLOSED
CLOSED
OPEN
CLOSED
CLOSED
CLOSED
CLOSED
CLOSED
•
•
•
•
•
1
Check that all valves are in the closed position as
shown. Turn on the mains water supply to the
appliance.
2
Open the filling loop valve. Check the system
pressure on the gauge, and vent all radiators and
air vents in the normal way. Vent the pipework
using the drain point on the Central Heating flow
valve as indicated. Close the filling loop valve
before the system pressure reaches 2.5 bar.
3
Check the system for soundness, then drain the
entire system to flush out any debris, and refill to
0.2 bar above the system design pressure by
repeating the above procedure
4
Disconnect the filling loop hose at both ends and
fit the cap on the Central Heating flow valve as
shown. The filling loop should be left with the
appliance for future servicing.
5
Return to the installation instructions at section 4.4,
fit the boiler, and complete the installation.
19
