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2.28 INITIAL LIGHTING
Legend
A. Hot Keys
B. Central Heating
Temperature Knob
C. Boiler Status Display
D. Burner On indicator
E. Pressure Gauge
F. CH Flow Isolating Valve
G. Gas Cock
H. Gas Inlet Pressure Test
point
I.
Boiler Drain Valve
J. CH Return isolating
valve
CAUTION: Do not operate the appliance before
it has been fully vented of air. If it is necessary to
operate the pump, do so with the gas service cock
turned off.
The boiler incorporates a fan overrun cycle which must not be
interrupted by isolation of electricity supply.
1. Check that the system has been filled and that the boiler is
not airlocked. Ensure the automatic air vent cap is open.
2. Refit the boiler front panel.
Refer to Section
3.4
3. Check that the drain valve (I) is closed and that the CH
isolating valves (F & J) are OPEN.
4. Press the Mode button until OFF is shown underneath the
boiler symbol on the boiler display.
5. Switch the electrical supply OFF
6. Check that the gas service cock (G) is OPEN.
7. Slacken the screw in the inlet pressure test point (H) and
connect a gas pressure gauge via a flexible tube.
8. Switch the electricity supply ON and check all external
controls are calling for heat.
9. Press the Mode Button (A) until OFF is not shown
underneath the boiler symbol on the boiler display. Turn
the Boiler Temperature Knob clockwise until a target of
80°C is shown. The boiler control will now go through its
ignition sequence until the burner is established.
Valves shown are in the open position.
32
Section 2 - Installation
C
D
On at 60°C
Target 60°C
Menu
Mode
A
2 bar
Max
1 bar
2
1
3
Min
0
4
bar
G
CH Flow
F
Gas Supply
H
B
Pressure Gauge
E
10. If the boiler does not light then after 5 attempts the boiler
will lock out and display "Ignition Lockout". Press the
Restart Button. The boiler will repeat its ignition sequence.
If Restart occurs 5 times within 15 minutes then "Too Many
Restarts" will be shown.
When the burner is established the flame symbol (D) will
be shown on the display and the current flow temperature
will be shown in the large digits underneath the radiator
symbol.
11. Ensure that with the boiler operating, the dynamic gas
pressure is able to obtain maximum output.
Refer to
Table 1
IMPORTANT The gas input to the burner is
regulated by the gas valve according to the air flow
produced by the fan. It is NOT user-adjustable. Any
interference to sealed settings on the gas valve will
adversely affect operation and render our warranty void.
Refer to Gas Supply
page 10
12. Remove gas pressure gauge, tighten inlet pressure test
point and check for gas tightness.
I
J
Drain
Valve
PRV
Outlet
CH Return
Installation and Servicing
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