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Need help?Do you have a question about the Alpha E-Tec 28 and is the answer not in the manual?
Boiler is inactive but frost protection and pump circulation remain active.
Electrical power is supplied, but the boiler will not function.
Boiler is active and can be switched between Summer or Winter settings.
Provides hot water only; central heating remains inactive.
Operates in both heating and hot water modes, prioritizing hot water.
Specifies required clearances around the boiler casing for installation.
Ensures the external flue terminal is unobstructed and undamaged.
Describes boiler behavior during electrical or water supply interruptions.
Advice on selecting compatible bathroom accessories for mains water pressure.
Instructions on how to clean the boiler outer casing safely.
Highlights the importance of annual servicing for safety and efficiency.
Immediate actions to take if a gas leak is suspected.
Details the boiler's electrical requirements and plug connection.
This document provides user instructions for the Alpha E-Tec 28 and 33, which are wall-mounted, fan-assisted, room-sealed, gas-fired, high-efficiency condensing combination boilers. These boilers are designed for use with Natural Gas.
The Alpha E-Tec range incorporates the latest technology in boiler design, offering improved burner efficiency and reduced electrical consumption, along with high quality and reliability. The boiler's output automatically adjusts according to the system's requirements. These boilers are compatible with most central heating controls, but the manufacturer recommends Alpha Comfort or Easy-Stat standard controls, or the enhanced Alpha Climatic boiler energy manager, for further system efficiency improvements by varying the system temperature based on room temperature and heat losses. All E-Tec models also feature optional connections for an outside sensor to enable a built-in weather compensation feature.
The boilers provide central heating during programmed 'on' times, as set by the fitted controls. Hot water always takes priority over central heating whenever a hot tap is opened.
Operating Modes: The boiler controls are located on the control panel. Before operation, ensure the heating system is filled and the pressure gauge needle (item 8 in Fig. 1) is in the green band when cold. If not, refer to Section 4 for filling instructions.
To operate, switch the boiler on at the mains supply socket. The boiler will initially be in either 'Standby' or 'On' mode.
Temperature Adjustment:
External Weather Compensation (if fitted): If an external weather compensation probe is fitted (indicated by the symbol, item 12 in Fig. 1), the boiler will automatically vary the radiator water temperature. On mild days, radiators may not feel as hot, which is normal and not a fault. The room temperature will still be maintained as set by the room thermostat. When an external weather sensor is fitted, the central heating temperature control buttons (items 6 and 7 in Fig. 1) will adjust a scale of 1 to 9, rather than °C. Each number corresponds to a line on the graph in Fig. 2, which illustrates flow temperature based on external temperature. For example, line 6 corresponds to a flow temperature of 60°C when the external temperature is 10°C. This setting controls the temperature of water supplied to radiators, not the desired room temperature. Time and temperature will still be maintained according to the room thermostat settings.
Filling and Pressurising the System: E-Tec models should have a filling loop installed by the installer in the pipework below the boiler.
Frost Protection: The boiler has a built-in frost protection function to protect itself from freezing. If water within the boiler falls below 4°C, the boiler will fire in heating mode to raise the heating water temperature (within the boiler only) to 30°C. For this function to be active, gas and electricity supplies to the boiler must be on, and the boiler must be in either 'Standby' or 'On' mode. Separate protection for the mains water supply and heating circuit must be provided. If Alpha external controls are fitted, a frost protection setting in the room thermostat activates central heating when the temperature falls below 5°C.
Condensate Drainage: High-efficiency (condensing) boilers extract more useful heat from combustion gases, producing water vapour (condensate) that is collected and routed to a suitable drainage point via the condensate drainage pipe. Where possible, the condensate drain should be connected internally to a waste pipe to prevent freezing. If the condensate drain pipe runs outside, it should be fitted with increased diameter pipe and suitably lagged to reduce freezing risk. In extreme temperatures or wind-chill, a proprietary trace-heating system with an external frost thermostat for external condensate drainage pipework should be considered.
Cleaning: Use only a damp cloth and mild detergent to clean the boiler's outer casing. Do not use abrasive cleaners.
Servicing: Routine annual servicing is essential to maintain efficient and safe operation of your boiler. This must be performed by a Gas Safe registered engineer who has been trained on the installed boiler. Service details should be recorded on the Benchmark Service Interval Record and left with the householder. To instigate the boiler guarantee, the boiler needs to be registered with the manufacturer within one month of installation.
Gas Safety Regulations: All gas appliances must be installed and serviced by a competent person (Gas Safe registered personnel). Failure to do so correctly can lead to prosecution. The manufacturer's instructions do not override statutory obligations. The Benchmark Checklist must be fully completed by the installer upon boiler installation. All Gas Safe registered installers carry a Gas Safe ID card with a registration number, which should be recorded in the Checklist. You can verify an installer's registration by calling Gas Safe on 0800 408 5500.
Important Notes:
General| Type | Combi |
|---|---|
| Output | 28 kW |
| Dimensions (H x W x D) | 712 x 440 x 255 mm |
| Efficiency Rating | 93% |
| Mounting | Wall Mounted |
| ERP Rating | A |
| CH Output (kW) | 28 kW |
| DHW Output (kW) | 28 kW |
| Warranty | 5 years |
| Fuel | Natural Gas |
