25
Concord CXS -
Installation & Servicing
34 CONTROL BOX - Basic Boiler, Exploded View
SERVICING
35 CONTROL SENSOR
1.
Remove the casing top panel and lower front panel.
2.
Remove the sensor from the thermostat pocket in the
rear heat exchanger section by removing the Heyco
bush.
3.
Undo the 2 screws securing the control box front
panel. Carefully lift up and lower it .
4.
Pull out the sensor plug from the PCB and remove the
strain relief bush. Remove the sensor and lead
5.
Fit the new sensor in reverse order, ensuring that the
lead is routed along the casing in the clips provided.
SER
VICING
5.
Terminal strip
6.
Back panel
7.
Lockout reset button
8.
Thermostat knob
1
2
3
12
5
4
6
8
9
7
2
10
11
LEGEND
1.
Wiring clamp.
2.
Connection box plug.
3.
Connection box.
4.
PCB S456B1047
9.
Potentiometer
10.
Warning light lens
11.
Controls box
12.
PCB W 4115A1020
1
Printed circuit board support detail
Retention
barbs
Back
panel
Retention
screw
PCB
