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icos - Installation & Servicing
SERVICING
62
MAINS SWITCH REPLACEMENT
1. Refer to Frame 52.
2. Remove the boiler front and bottom panel.
Refer to Frames 45 & 46.
3. Remove the 2 control box screws and lower
the control box.
4. Push out the mains switch from the rear, as
shown.
5. Refit the new switch, ensuring that the
electrical leads are replaced on the correct
terminals (refer to Frame 38) and the key
on the switch is correctly aligned with the
slot in the plastic moulding.
6. Reassemble in reverse order.
7. Check operation of the boiler. Refer to
Frame 52.
61
CONTROL BOX REPLACEMENT
1. Refer to Frame 52.
2. Remove the front panel.
3. Remove the bottom panel.
4. Remove the 2 control box screws.
5. Carefully unplug all the electrical wiring from the control box.
6. With the control box lowered, pull the assembly forward to
remove from the housing.
7. Remove the user control from the assembly.
8. Transfer the mounting brackets to the new control box.
9. Reassemble in reverse order, ensuring that the control box is
located correctly in the housing before reconnecting the
electrical wiring.
10.Check operation of the boiler. Refer to Frame 52.
N.B. To change the user control only.
11. Loosen the screw on the underside of the user control.
12. Pull the display unit forward to remove.
13. Push the new display unit into position.
14. Reassemble in reverse order.
15. Check the operation of the boiler. Refer to Frame 52.
Ecl 2419
Mounting brackets
Control box
11
nm7804
Ecl 2438
4
SERVICING