Supplied By www.heating spares.co Tel. 0161 620 6677
36
14478
14564
14457
Diagram 10.1
Diagram 10.2
Diagram 10.3
10 Electrical Connection
10.2 System Controls 24V
WARNING:
UNDER NO CIRCUMSTANCES MUST
ANY MAINS VOLTAGE BE APPLIED TO ANY OF THE
TERMINALS ON THE 24V CONNECTION.
The 24V low voltage room thermostat terminal block is
located on the left side of the rear cover of the controls box.
To access the 24V low voltage room thermostat terminal block
remove the front panel secured with two screws, lift off the
two retaining lugs, see diagram 10.1.
Carefully pull forward and down the controls fascia, see
diagram 10.2.
On connection of a voltage free room thermostat to the boiler,
the factory fitted bridge across the room thermostat terminal
block must be removed, see diagram 10.3.
1
2
3
4
bar
0
1
0
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
24
23
ON
30
40
50
60
70
80
90
bar
O
C
WTH ROOM
THERMOSTAT
WTHOUT ROOM
THERMOSTAT
SECURING
SCREWS
FITTED
BRIDGE
FITTED
BRIDGE
RETAINING
LUGS
24V LOW VOLTAGE
ROOM THERMOSTAT
TERMINAL BLOCK
