Main Combi 24 HE Manuel de service télécharger pdf (Page 27)

8.0 Installation

8.9 Making The Electrical Connections

To connect the mains input cable proceed as follows:-

1. Slacken the facia panel securing screws and lift the

outercase panel so that its securing tabs are clear of the

facia. Remove the panel.

2. Completely undo the screws securing the facia panel and

hinge it down (Fig. 26).

3. Remove the control box cover securing screws.

Disengage the barbs on the control box from the cover.

Remove the cover (Fig. 27).

4. Slacken the cable clamp on the LH side of the boiler

chassis (Fig. 28). Insert the cable through the clamp and

route it to the terminal block.

5. Slacken the screws in the terminal block, connect the

input cable, and tighten the screws.

NOTE: Both the Live and Neutral connections are fused.

6. The boiler is fitted with an integral timer. If a room

thermostat is to be connected it can be done at this point.

Run the input cable from the thermostat through the second

cable clamp on the boiler chassis. Refer to the instructions

supplied with the control.

IMPORTANT: The room thermostat MUST be suitable

for 230V switching.

NOTE: An external frost thermostat cannot be used

with the integral timer.

7. Remove the link between terminals 1 & 2. The 230V

supply at terminal 1 can be connected to the thermostat.

The switched output from the thermostat must be

connected to terminal 2. (Fig. 29). If the room thermostat

being used incorporates an anticipator it MUST be wired as

shown in Fig. 29.

8. Ensure that both mains input and, where fitted, external

control input cables have sufficient slack to allow the control

box to drop down. Tighten the cable clamp(s) on the boiler

chassis.

8.10 Preliminary Electrical Checks

1. Prior to commissioning the boiler preliminary electrical

system checks should be carried out.

2. These should be performed using a suitable meter, and

include checks for Earth Continuity,

Resistance to Earth, Short Circuit and Polarity.

Always fit fast

blow 2A fuse

Fused supply 3A

230V ~ 50Hz

Neutral (blue)

Earth (green/yellow)

Live (brown)

230V

g/y

Room Thermostat

230 V

Fig. 28

Fig. 27

Fig. 29

Fig. 26

Terminal Block

Fuses

Cable Clamp

Control Box Cover

Facia Panel

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 55 56

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Main Combi 24 HE Manuel de service Page 27

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