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2.22 INITIAL LIGHTING
Legend
A. Domestic Hot Water Temperature Knob
B. Central Heating Temperature Knob
C. Mode Knob
D. Boiler Status Display
E. Burner 'on' Indicator
F.
Central Heating Economy Setting
G. CH Flow Isolating Valve
H. Gas Inlet Pressure Test Point
I.
Gas Service Cock
J.
DHW Inlet Valve
K. CH Return Isolating Valve
L.
DHW Outlet
M. Pressure Gauge
1. Check that the system has been filled 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, refer to Section 2.25, point 4. 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. Refit the boiler front panel. Refer to Section 3.2.
3. Check that the drain cock is closed and that the CH and DHW isolating
valves (G, J and K) are OPEN.
4. Check that the electrical supply is OFF.
5. Check that the boiler mode knob (C) is off.
6. Check that the gas service cock (I) 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 mechanical timer is in "Manual
On" position.
CENTRAL HEATING
9. Set the CH temp control (B) to "MAX" and turn the mode knob (C) to
'
'. The boiler control should 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 2.
Restart the boiler (Refer to Section 2.24). The boiler will repeat its
ignition sequence. If restart occurs 5 times within 15 minutes then
LC will be shown.
When the burner is established the ' ' will be shown on the display
with the ' ' indicating central heating operation and the current flow
temperature shown in the 2 digit display.
DOMESTIC HOT WATER
11. With the boiler firing, set the DHW Temp Knob (A) to maximum
and fully open a DHW tap.
The boiler should continue to run and the display should change
from showing ' ' to ' '.
12. 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.
For additional gas supply info refer to "Gas Supply" on page 12.
13. Turn off the DHW tap.
Installation and Servicing
SECTION 2 - INSTALLATION
MIN
M
ºC
HOT WATER
PREHEAT
ON
MAX
PREHEAT
RESTART
A
D
E
G
L
Black
Handle
Yellow
Handle
I
H
Outer dial
Manual OFF
Timed
Manual ON
Align current
time to arrow
ON
PERIOD
THE DISPLAY
The user control has one display to inform the user about
the status of the boiler. The LCD Display shows the status
of the flame. If no flame is detected the flame symbol
will not be visible. When the flame is detected the flame
symbol will be visible permanently.
Below is a list with display function in normal operation.
Standby, no demand for heat present.
0 0
Boiler is active for central heating.
Boiler is active for domestic hot water.
Boiler is heating up the plate heat exchanger.
P H
Boiler is active for boiler frost protection.
F P
Boiler is in lockout for a specific error. Display will
show a number after the " " to indicate which error is
detected.
Boiler has a fault for a specific error. Display will show a
F
number after the " " to indicate which error is detected.
Note: Boiler frost protection - boiler operates if the
ambient temperature is below 5ºC until it reaches 19ºC.
Note. The boiler incorporates a fan overrun cycle which
MUST NOT be prematurely interrupted by isolation of the
mains electricity supply.
BOILER
OFF
e
MIN
MAX
MODE
B F
C
J
K
Safety
Blue
Drain
Handle
Valve
Black
Handle
MECHANICAL TIMER
1
GRASSLIN
3G9994
ON
PERIOD
35
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