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Summary of Contents for Alpha Alpha Plus DH Units
- Page 1 Instructions for Installation Alpha Plus DH Units for Domestic Hot Water and Direct Central Heating Alpha Therm Ltd Nepicar House London Rd Wrotham Heath Kent TN15 7RS Leave these instructions with the User...
- Page 2 INTRODUCTION The Alpha Plus district heating units are hydraulic units designed for various heating applications within individual domestic dwellings served by a district heating scheme. The units are:- Domestic Hot Water Unit – Model DHW (Part No 6.3000100) This unit provides instantaneous hot water indirectly from a district heating circuit via a plate heat exchanger.
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Page 3: 2/ Technical Data
TECHNICAL DATA District Heating Circuit and Direct Central Heating Max Working Pressure 8 bar Min Working Pressure 1 bar Max Flow Temperature 95°C Max Differential Pressure 4 bar Flow connection 22mm Return connection 22mm Secondary Circuit (Domestic Hot Water) Max Working Pressure 8 bar Min Working Pressure 0.2 bar... - Page 4 Electrical Supply – 230/240V – 50 Hz External fuse - 3 A Power Consumption – 6W Installation Dimensions of assembled Unit Height 500mm (Including Cover) Width 300mm Depth 220mm Min clearances required Bottom 200mm Sides Front 450mm Assembled weight of Units DHW1 7.4kg DCH1...
- Page 5 Schematic Diagram...
- Page 6 OPERATION Domestic hot water is available continuously and always takes priority over central heating. If a demand for hot water is required during a central heating period the controls will automatically switch to the hot water mode until the demand is satisfied.
- Page 7 Unit Location The unit is not suitable for external installation. It must be installed vertically on a flat vertical wall which is capable of supporting its weight. Decide upon the position of the unit taking into consideration the clearances required (Refer Sect 2.5) Refer to diagram below for the layout and location of the two units:...
- Page 8 Fit the DHW Unit Drill four fixing holes (5mm dia) through the back panel of the unit to accept the No. 8 screws supplied. Hold the unit on the wall in the required position ensuring it is level and mark the position of the fixing holes.
- Page 9 Connect the Electrical Supply (Refer Sect 2.4) The Unit requires a 230/240V ~ 50Hz mains supply, fused at 3A The Unit must be earthed. There must be only one common isolator, providing complete electrical isolation, for the Unit and any external controls. ²...
- Page 10 Ensure terminal block 2 is correctly located into the control box as shown below. Replace the control box cover and secure with the 4 screws previously removed.
- Page 11 COMMISSIONING Fill the DHW pipework. Open the cold mains inlet valve. Turn on all the hot water taps and allow water to flow until there is no air present. Turn off the taps and check for water soundness, rectifying if necessary. Fill the DH circuit pipework.
- Page 12 SHORT PARTS LIST Description Alpha Pt. No. DHW Heat Exchanger 1.020259 DHW Flow Switch 1.015142 Pipe 1 – Mains Inlet/Flow Sw 1.019921 Pipe 2 – Flow Sw/HE 1.019922 Pipe 3 – DHW Outlet 1.019923 Pipe 4 – DH Flow 1.019924 Pipe 6 –...
- Page 14 These instructions have been carefully prepared but we reserve the right to alter the specification at any time in the interest of product improvement. Alpha Therm Ltd 2005 Part no 6.3000160 04/05...
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