Keston Combi 35kw User Manual download pdf (Page 25)

INSTALLATION

Keston Combi - Installation and Servicing

INTERNAL WIRING

The Keston Combi boiler comes pre-tted with 1.8m of

mains cable. This must be connected to a permanent live

supply and NOT switched by thermostats/programmers.

For installers wishing to change this cable refer to Frame

26.

The Keston Combi boiler comes pre-tted with a link wire

between the room thermostat/Timer connections on the

terminal strip. This creates a permanent call for heat

and must be removed when adding a room thermostat/

programmer.

The terminal block cover carries two spare fuses for the

main PCB.

To add thermostat/programmer:

1. Isolate the mains supply to the boiler.

2. Remove the front panel. Refer to Frame 39.

3. Swing the control box down into the servicing position.

Refer to Frame 45.

4. Route incoming cables through the grommets in bottom

panel (note, grommets are ‘blind’ and will require puncturing)

and secure using clamps and screws provided in hardware

pack.

5. Pull off rubber terminal block cover.

6. Connect wires to terminal block, as shown below

7. Re-assemble in reverse order.

continued . . . .

ELECTRICAL CONNECTIONS

Wiring should be 3 core PVC insulated cable, not less than

0.75mm

(24 x 0.2mm), and to BS 6500 Table 16. For IE

reference should be made to the current ETCI rules for electrical

installations.

Connection must be made in a way that allows complete isolation

of the electrical supply such as a double pole switch having

a 3mm (1/8”) contact separation in both poles. The means of

isolation must be accessible to the user after installation.

WARNING. This appliance MUST be earthed.

A mains supply of 230Vac ~ 50 Hz is required.

The fuse rating should be 3A. All external controls and wiring

must be suitable for mains voltage.

Wiring external to the boiler MUST be in accordance with the

current I.E.E. (BS.7671) Wiring Regulations and any local

regulations.

Spare PCB fuses

INSTALLATION

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