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User's
Instructions
Alpha HE CB25/33 and HE SY25
Wall Mounted, Fan Assisted, Room Sealed, Gas Fired,
High Efficiency Condensing Boiler Range
For Technical help or for Service call ...
ALPHA HELPLINE
Tel: 0870 3001964
Nepicar House, London Road,
Wrotham Heath, Sevenoaks,
Kent TN15 7RS
Service Listed
Alpha HE CB25 G.C. No. 47 532 25
Alpha HE CB33 G.C. No. 47 532 26
Alpha HE SY25 G.C. No. 41 532 07
For use with Natural Gas only
Leave these instructions with the User
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1 DESCRIPTION The Alpha HE Range of boilers are wall mounted, fan assisted room-sealed boilers. The HE CB25 and HE CB33 are combination boilers providing both central heating and domestic hot water at mains pressure. The HE SY25 is a system boiler providing heating only for sealed central heating systems. The Alpha HE CB25 and HE SY25 boilers are suitable for central heating loads of between 14.5 and 25.0 kW (49 500 and 85 300 Btu/h). The Alpha HE CB33 boiler is suitable for central heating load
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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 turned fully clockwise i.e. maximum output. If lower heating temperatures are required, turn the thermostat anti-clockwise. 2. DOMESTIC HOT WATER THERMOSTAT - HE CB25/33 only This thermostat controls the temperature of the domestic hot water leaving the boiler. For maximum hot water temperat
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4 LIGHTING INSTRUCTIONS Refer to Fig. 1a or 1b for boiler controls. 1. Ensure the following:- a. Electrical supply to the boiler is off. b. All heating controls and thermostats are set to OFF or minimum position. c. All isolation valves at the bottom of the boiler are in the open position (slot on the spindle in line with the valves i.e. ). d. The gas and water supplies are on at the mains. e. The heating system pressure is within the green band as shown by the pressure gauge. 2. Switch on the
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7 USING A SHOWER - HE CB25/33 only Thermostatic or pressure equalising type - When using these types of shower set the boiler domestic hot water thermostat to maximum. The shower should then maintain a relatively constant temperature. Manual bath mixer type shower - When using this type of shower set the boiler domestic hot water thermostat to setting 7, This should avoid excessive temperatures at the shower. Note: If you get unacceptable temperature variations with this type of shower, then a t
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9 GAS SAFETY REGULATIONS Current Gas Safety (Installation and Use) Regulations:- It is the law that all gas appliances are installed and serviced by a competent person, i.e. CORGI registered personnel. Failure to install or service appliances correctly could lead to prosecution. It is in your interest and that of safety to ensure compliance with the law. The manufacturer's instructions must not be taken in any way as over-riding statutory obligations. The Benchmark Checklist must be fully comple
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10 FAULT FINDING FOR THE USER If you experience a problem of no heating or hot water, try to solve the problem by following the simple checks below before calling out a service engineer. Pull the controls panel cover forward and down to gain access to the controls. Alpha HE CB/SY 7
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Alpha Therm Limited. These instructions have been carefully prepared but we reserve the right to Nepicar House, London Road, Wrotham Heath, alter the specification at any time in the interest of product improvement. Sevenoaks, Kent TN15 7RS © Alpha Therm Limited 2005. Tel: 0870 3001964 email: info@alphatherm.co.uk website: www.alpha-boilers.com Part No. 1.022793 Manual compiled and designed by Publications 2000 - Tel: (01670) 356211 06/05/D187
