32
INITIAL LIGHTING
1. Check that the system has been lled to the required pressure
and that the boiler is not airlocked. Ensure the automatic air vent
cap is open.
Note.
It is important the burner is not operated before the system is fully
vented of air. If it is necessary to operate the appliance pump to
assist venting of the air this must be done with the gas service cock
turned off.
2. Ret the boiler front panel. Refer to Frame 39.
3. Check that the drain cock is closed and that the CH and DHW
isolating valves (N, O and J) are OPEN.
4. Check that the electrical supply is OFF.
5. Check that the boiler mode knob (D) is off.
6. Check that the gas service cock (M) is OPEN.
7. Slacken the screw in the inlet pressure test point (L) and connect
a gas pressure gauge via a exible tube.
8. Switch the electricity supply ON and check all external controls
are calling for heat.
CENTRAL HEATING
9. Set the CH temp knob (C) to max and turn the mode knob (D) to
‘
’, ensure the timer/room stat are on. The boiler control will now
go through its ignition sequence until the burner is established.
10. If the boiler does not light the following messages will be displayed
in rotation “Ignition Lockout” - “1 Check other gas appliances
work” - “2 Restart boiler” - “3 Contact installer”. After
5 attempts the boiler will lock out and carry on displaying the
messages. Restart the boiler (refer to Frame 35). The boiler will
repeat its ignition sequence. If restart occurs 5 times within 15
minutes then “Too many restarts” will be shown. If power is
removed this will be reset.
When the burner is established the BLUE ‘Burner On’ neon (F)
will be illuminated, the LCD (E) will display “Central Heating” and
“Radiators XX
o
C”.
DOMESTIC HOT WATER
11. With the boiler ring, set the DHW Temp knob (B) to
maximum and fully open a DHW tap.
The boiler will continue to run and the LCD (E) will
display “Hot Water” - “Temperature XX
o
C” -
“High Efciency”.
12. Ensure that with the boiler operating the dynamic gas
pressure is able to obtain maximum output. Refer to
Table 2.
IMPORTANT
NOT
For additional gas supply information refer to “Gas Supply”
on page 10
13. Turn off the DHW tap.
continued. . . . .
Note. The temperature displayed “XXºC” is that
measured at that moment, not the set temperature.
Note. The boiler incorporates a fan overrun cycle
which MUST NOT be prematurely interrupted by
isolation of the mains electricity supply.
A. Domestic Hot Water Preheat On/Off Knob
B. Domestic Hot Water Temperature Knob
C. Central Heating Temperature Knob
D. Mode Knob
E. Boiler Status
F. Burner ‘on’ Indicator
H. Central Heating Economy Setting
J. CH Flow Isolating Valve
K. System Pressure Gauge
L. Gas Inlet Pressure Test Point
M. Gas Service Cock
N. DHW Inlet Valve
O. CH Return Isolating Valve
P. DHW Outlet
Q. Filling Loop Valve
Filling
Loop
CH Flow
DHW
Outlet
CH
Return
DHW
Inlet
Gas
Supply
J
P
K
M
L
N
O
Q
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