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8.0
COMMISSIONING AND TESTING
8.1
Filling the Central Heating System
Burner pressure
test point
C.H. temperature sensor
Gas inlet pressure
D.H.W. drain point
test point
Remove the top front panel by gripping both sides and pulling forward away from main boiler assembly.
Loosen the cap of the automatic air vent (fig. 15) and leave it loose.
Open the central heating flow and return cocks (fig. 9).
Gradually fill the system as detailed in Make up Water.
While filling, vent the heat exchanger at venting point by loosening cap (fig. 15) on the right hand side
and vent each radiator. Tighten cap on heat exchanger air vent, but be sure to leave loose the plastic
cap on the automatic air vent.
Ensure the working pressure, when filled, is between 1 an 1.5 bar on the pressure gauge (see technical
data).
Check the system for leaks.
Flush system in accordance with B.S. 7593.
8.2
Filling the Domestic Hot Water System
Close all hot water draw off points. Open main cold water stop cock and ensure the cold water inlet
cock is open at the boiler jig bracket (fig. 9). Slowly open each hot tap in turn until clean water, free from
air pockets, is seen.
Check system for leaks.
8.3
Electricity Supply
Carry out preliminary checks (i.e. earth continuity, polarily short circuit and resistance to earth
using a suitable multimeter).
8.4
The Gas Installation
The whole of the gas installation including the meter, should be inspected and tested for soundness,
and purged in accordance with the recommendations of BS6891-1988.
20
Automatic air vent
phial and shim
D.H.W. expansion
vessel (optional)
C.H. pressure relief valve
(at the rear of cold
water flow switch)
201
Plastic cap
Heat exchanger vent
Pump
Pressure gauge
Fig. 14
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