Alpha SY9-24 User Guide

User's

Instructions

Alpha SY9-24

Wall Mounted, Fan Assisted, Room Sealed, Gas Fired

System Boiler

For Technical help or for Service call ...

ALPHA HELPLINE

Tel: [phone]

Nepicar House, London Road,

Wrotham Heath, Sevenoaks,

Kent TN15 7RS

Service Listed

Alpha SY9-24 G.C. No. 41 532 01

For use with Natural Gas only

Leave these instructions with the User

1 DESCRIPTION

The Alpha SY9-24 boiler is a wall mounted, fan assisted room-sealed boiler, providing central heating.
The Alpha SY9-24 boiler is suitable for central heating loads of between 9.3 and 23.3 kW (31 700 and 79 500 Btu/h).
The boiler will provide central heating (as required) during the 'on' times set on your external clock (if fitted).
The burner is lit electronically.

2 USER CONTROLS

Fig. 1

3 BOILER CONTROLS

1. CENTRAL HEATING THERMOSTAT

This thermostat controls the temperature of the water leaving the boiler for the heating system. For maximum output from the
radiators the thermostat should be left at maximum i.e. fully clockwise. If lower heating temperatures are required, turn the thermostat
anti-clockwise.

2. SELECTOR SWITCH

This control is used to turn the boiler on and off or to 'reset' the ignition sequence or to set to the frost thermostat only.
See section 4 Indicator Neons.
Note: The frost thermostat will not operate when the switch is in the vertical position, i.e. 'Off' position (0).

3. PRESSURE GAUGE

This indicates the central heating system pressure. It should always be within the green band when cold, increasing slightly
when hot.
If the pressure falls below the green band, ie lower red area, the system needs re-pressurising. Contact your Installer to have
the system checked and pressurised.

4. INDICATOR NEONS

When neon A (red) and neon B (yellow) are illuminated, the following conditions apply:-

Neon

B Flashing very slowly (every 5 seconds) - Electricity supply to the boiler is on.
B Illuminated continuously - Burner is alight.
B Flashing on and off - Temperature sensor fault, contact your Service Engineer.

A Flashing on and off - Overheat thermostat has operated. Rotate selector switch to the reset position (3) to reset. If this continues

to happen, contact yor Service Engineer.

A Illuminated continuously - Burner has failed to light. Rotate selector switch to the reset position (3) and the ignition

sequence will restart after a delay of about 30 seconds.

A and B Flashing on and off at the same time - Blocked flue or fan fault, contact your Service Engineer.
A and B Flashing on and off alternatively - System pressure is very low and re-pressurisation is required.
A Illuminated continuously and B flashing - Pump fault or restricted flow.

2

Alpha SY9-24