15
Before commissioning the appliance, the whole gas
installation including the meter (if fitted) MUST be
purged and tested for gas soundness.
IMPORTANT: open all doors and windows, extin-
guish naked lights, and DO NOT SMOKE whilst
purging the gas line.
Before commencing the commissioning procedure,
ensure that the central heating system and the
domestic hot and cold water system have been
flushed. This will remove contamination which could
cause the boiler to fail.
6.1 DOMESTIC HOT WATER
Turn on the DHW isolation valve.
Fill and vent the installation by turning on the various
hot water taps in the installation
Make sure that there are no leaks in the installation.
6.2 CENTRAL HEATING CIRCUIT
In order for the boiler to function correctly, the pres-
sure in the central heating circuit must be between
0.8 and 1.6 bar when cold.
Both the boiler and the central heating installation
must be purged of any air in the water pipes which
may cause noise and the incorrect functioning of the
system.
The boiler is fitted with an automatic air vent.
In order to fill the installation correctly the following
sequence must be followed:
- Open one or more radiator bleed vent screws.
- Fill the central heating circuit using the approved
method given in section 4.8
- Turn off each of the air vents as water starts to
appear from them.
- Turn off the filling tap when the pressure gauge
exceeds 1.6 bar.
- Turn the main control switch to the winter setting,
making sure that the pump runs. The pump will not
run if there is insufficient pressure.
- Vent the central heating circuit once more. Then let
the pressure in the circuit settle at 1.6 bar. If neces-
sary open the pressure relief valve to reduce the
pressure in the system.
- Make sure that there are no leaks in the installation.
6.3 GAS CIRCUIT
Purge the gas circuit as described above. Turn on
the gas cock to the installation and check that there
are no leaks using leak detection fluid.
6.4 SETTINGS
Before leaving the factory the boiler is pre-set in
accordance with the information on the data plate,
and therefore needs no further adjustment.
6.5 INITIAL OPERATION
6.5.1 Preliminary warnings
- Make sure that the central heating circuit is
completely full and vented. The pressure gauge
should indicate a pressure of between 0.8 and 1.6
bar.
- Make sure that the air intake and the flue outlet are
not blocked.
6.5.2 Domestic hot water service
To turn on the boiler turn the main control switch on
so the green light shows The boiler is then ready to
supply D.H.W. on demand.
Whenever a hot tap is opened the boiler automatical-
ly fires up to deliver hot water. The temperature
selector control should be set at maximum. If the
ambient water temperature is high (as in a hot cli-
mate) then the hot water temperature may be
reduced by using this knob.
6.5.3 Hot water and central heating service
Set the tappets on the time clock to an on position
and the main control switch on so the green light is
on. The room stat (if fitted) to max temp. Then turn
the central heating selector clockwise. The boiler will
fire up. By means of the central heating temperature
selector control knob, any water temperature of
between 60 and 85°C may be selected. The boiler
will remain on until the temperature selected on the
room thermostat or on the boiler itself is reached.
Whenever there is a demand for D.H.W. on the cen-
tral heating setting, the boiler is ready to supply it giv-
ing priority to the D.H.W. with the central heating on
standby until the D.H.W. demand ceases.
6.5.4 Turning the boiler off
- Turn the main control switch to the O setting.
- Turn off the gas supply to the boiler.
6.5.5 Appliance safety lock-out
This boiler has a cut-out indicator built in to it.
Whenever a malfunction is detected, the boiler
switches off automatically and the indicator lights up
6.- COMMISSIONING INSTRUCTIONS
