10
8
ADJUSTMENT
Choice of Mode :
- Function without room thermostat, bridge S remains in place.
- Function with room thermostat, remove bridge S, room ther-
mostat connected as shown on connector D (Fig.11).
The external control switches both burner and pump. The
external control switches the pump off after a delay of 3 min 30
seconds
Choice of Boiler Operation :
In order to make these adjustments you will need to access the
front of the electrical box.
Isolate the mains electrical supply to boiler.
Remove the boiler outer casing.
Remove the rubber cover E (Fig.12) on the front of electrical
box.
Adjustment on the PCB Central Heating Mode (Fig.13) :
- P3 : potentiometer TAC (Temporisation Anti Cycle) may now
be adjusted between 30 seconds and 3 minutes (see
detail) (factory set at 3 minutes).
- JP3 : the spade connector (Fig.14) allows the gas rate to be
reduced to 1/3 performance by positioning the spade
across the pins as shown (Fig.14).
Full performance across pins as shown (Fig.14).
After completing the adjustments replace the rubber cover and
refit the outer casing.
C10C10
C11C11
C38C38
F1
F1
F1A
F1A
J1J1
J2J2
J5 J5
MV1
MV1
R67
R67
R72
R72
R73
R73
R75R75
R76R76
R85
R85
1
2
HOR
N
L
THERMOST
A
T
N
L
J9
J10
J11
T
A
24
V
230
V
P3
Fig. 13
Fig. 12
(P3-P4-P5)
mini
maxi
P3
Detail
P3
P3
1/3
3/3
P3
P3
1/3
3/3
P3
P4
P5
J1
J2
S
Connector D
T.A.
Mains supply cable
Room thermostat
Fig. 11
C
E
B
Making the Electrical Connections:
Connect the live and neutral wires of the main cable. Note: The
connections should be made so that should the lead be pulled
from its anchorage, the current carrying wires become taut
before the earth wire.
If using a room thermostat or other external control, undo the
two retaining screws B, remove cover C (Fig.12), they can be
connected in place of the link on the multipin plug.D.
Connect the multipin plug into the socket on the power board.
Replace the cover.
Fig. 14
Installing the Boiler
(contiunued)
