901
19
8.0
COMMISSIONING AND TESTING
8.1
Filling the Central Heating System
Remove the top front panel by gripping both sides and lifting forward away from main boiler assembly.
Fig. 20
Burner pressure
test point
Automatic air vent
Vent cap
Heat exchanger vent
Pump
C.H. pressure relief valve
Gas inlet pressure
test point
D.H.W. drain point
pressure gauge
Loosen the cap of the automatic air vent (fig. 20) and leave it loose.
Open the central heating flow and return cocks (fig. 11).
Gradually fill the system as detailed in Make up Water.
While filling, vent the heat exchanger at venting point by loosening cap (fig. 20) and vent each radiator.
Tighten cap on heat exchanger air vent.
Ensure the working pressure, when filled, is between 1 to 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. 11). 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.
Low water pressure switch
