Bosch 15SBI Service Manual download pdf (Page 10)

The 24SBi appliance requires a maximum of 2.86m

/h of natural

gas (G20) or 1.1m

/h of propane (G31). Refer to Table 1.

The 15SBi appliance requires a maximum of 1.76m

/h of natural

gas (G20) or 0.68m

/h of propane (G31). Refer to Table 1.

A natural gas appliance must be connected to a governed meter.

The installation of the gas supply to the appliance must be in

accordance with BS6891.

The meter and the pipework to the appliance must be checked,

preferably by the gas supplier, to ensure that a dynamic pressure

of 20mbar for natural gas or 37mbar for propane is available at

the appliance [equivalent to about 18mbar or 35mbar at the gas

valve inlet pressure connection] and that the gas flow is

adequate for all the installed gas appliances.

Mains supply: 230V ( 50 Hz 180watts. External fuse 5A. Internal

fuse F1-4A. Spare internal fuse is supplied with the appliance.

The appliance must be earthed and it must be possible to

completely isolate the appliance.

The mains cable must be 0.75mm2 (24x0.20 mm) to BS6500 -

Table 15 or 16.

The mains cable must be connected to the terminal marked L

(red or brown lead), N (black or blue lead) and the Earth stud

(green or green/yellow lead) and secured with the cable clamp.

The connection to the mains must be either : A 3A fused three-

pin plug and unswitched socket outlet (both complying with

BS1363) or a double pole isolator with a contact separation of

3mm in all poles.

NOTE: There must be no other permanent electrical supply to

the system. This ensures the safety of a single fused supply.

A room thermostat must be suitable for mains voltage operation.

A mechanical timer, to fit into the facia, is available.

A frost thermostat should be considered where parts of the

system are remote from the appliance. For any frost thermostat

function, the boiler temperature control knob must not be set to

the 'off' position.

NOTE: In some cases these devices should not be connected

at these points. Refer to separate system wiring guide booklet.

Safety Check: If there is an electrical fault after installation check

for fuse failure, short circuits, incorrect polarity of connections,

earth continuity or resistance to earth.

10. Electrical

9. Gas Supply

Strain relief clamp

Green/yellow

Brown

Blue

Ls Lr

Fig.11 . Mains electricity connections.

Green/yellow

230V

ST12

Earth

External Controls

Bottom Left Hand Side - Facia

Fig 10 - Replacement internal fuse

1. Control Panel Pivot 4. Facia Panel

Point 5. Control Board

2. Fuse -F1 Assembly

3. Pressure Gauge

Fig 12 - Mains Voltage External Controls Connections

Room Thermostat - 230 Volt

Live

Switched Live

Neutral

Remove link

Room Thermostat

Ls Lr N

Frost Thermostat - 230 Volt

Ls Lr N

FROST

Frost Thermostat

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 36 37

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Bosch 15SBI Service Manual Page 10

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