31
Installation and Servicing
Section 2 - Installation
INST
ALLA
TION
Yellow
Handle
Black
Handle
Black
Handle
CH Flow
Gas
Supply
CH Return
PRV
Outlet
2.25 INITIAL LIGHTING
IMPORTANT
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.
2.
Refit the boiler front panel.
Refer to Section
3.4
3. Check that the drain valve is closed and that the CH
isolating valves (F & K) are OPEN.
4. Press the Mode button until Off is shown at the bottom of
the screen (Boiler off).
5. Switch the electrical supply OFF
6. Check that the gas service cock (J) 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.
CENTRAL HEATING
9. Press the Mode Button (B) until On is shown at the
bottom of the screen. Turn the Temperature Knob
clockwise until a target of 80°C is shown on the smaller
digits. The boiler control will now go through its ignition
sequence until the burner is established.
10. If the boiler does not light then after 5 attempts the
boiler will lock out and display fault code L 02. Press
the Restart Button (E). The boiler will repeat its ignition
sequence. If Restart occurs 5 times within 15 minutes
then L 0C 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.
11. Ensure that with the boiler operating, the dynamic
gas pressure is able to obtain maximum output.
Refer to Table 2.
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 9
12. Remove gas pressure gauge, tighten inlet pressure test
point and check for gas tightness.
Legend
A. Temperature Knob
B. Mode Button
C. Boiler Status Display
D. Burner On indicator
E. Restart Button
F. CH Flow Isolating Valve
G. System Pressure Gauge
H. Gas Inlet Pressure Test
point
J. Gas Service cock
K. CH Return isolating valve
L. PRV Drain
F
J
H
K
L
1
0
2
3
4
bar
C
A
B
D
N
E
G