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User Manual
AquaFlow
AquaFlow Twin
Supplied By www.heating spares.co Tel. 0161 620 6677
Single coil water cylinder
Twin coil water cylinder
Installation
& Servicing
Instructions
THESE INSTRUCTIONS
TO BE RETAINED
BY USER
Vokèra is a licensed member of the Benchmark scheme
which aims to improve the standards of installation and
commissioning of domestic hot water systems in the UK.
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Summary of Contents for VOKERA AquaFlow
- Page 1 AquaFlow Single coil water cylinder AquaFlow Twin Twin coil water cylinder Installation & Servicing Instructions THESE INSTRUCTIONS TO BE RETAINED BY USER Vokèra is a licensed member of the Benchmark scheme which aims to improve the standards of installation and commissioning of domestic hot water systems in the UK.
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Page 2: Health And Safety
LOWER COIL Installation details The Vokera unvented unit is designed for use with supply pressure up to 16 bar. For pressures over 16 bar an additional pressure reducing valve must be fitted in the supply pipe to the unit. Wall mounting brackets are available for Vokera Aquaflow unvented units 120-200 litres capacity. - Page 3 General Layout Fig: 1 RESET RESET RESET RESET INDIRECT Part No Part No Flow ¾" BSPF Flexible Hose 202108 Return ¾" BSPF Secondary Return ½”BSPF Fit ½"Fx½"Mx15mm Tee piece (Not supplied) Pressure Reducing Valve 510503 Commisioning Valve / Fitting 250440 Includes Item 4 (½"...
- Page 4 General Layout Fig: 1A Part No Part No Return ¾" BSP Flexible Hose 202108 Return ¾" BSP Flow ¾" BSP Secondary Return ½”BSPF Flow ¾" BSP Fit ½"Fx½"Mx15mm Tee piece (Not supplied) Pressure Reducing Valve 510503 Commissioning Valve / Fitting 250440 Includes Item 4 (½"...
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Page 5: Cold Water Supply
COLD WATER SUPPLY To obtain the best performance from your Aquaflow unvented system it is advisable to feed the unit with an uninterrupted supply. Locate the water heater in a suitable position to facilitate the installation of the cold water supply, discharge fittings and pipework. -
Page 6: Expansion Vessel
The Solar flow and return connections should be made to the lower coil connections. Temperature control from the Solar circuit is achieved using a differential solar controller. The solar pump must be wired in series through the thermal cut-out on the Aquaflow cylinder (see figure3 page 12). - Page 7 Draining Switch off the electrical power off (Important to avoid damage to element). Isolate boiler from Aquaflow unit. Turn off the cold water supply valve. Open hot water tap. Open drain (13). The unit will drain. SAFETY AND MAINTAINANCE Safety Cut-out 1.
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Page 8: Hot Water Discharge From Tundish
7. Open and close a hot tap to ensure continuity of supply Turn on electrical supply to the immersion heaters. Hot water discharge from tundish This indicates a malfunction of a thermal cut-out, operating thermostat or the combined temperature and pressure relief valve. Turn off the electrical supply to the immersion heater and also isolate an indirect unit from the boiler. -
Page 9: Maintenance
MAINTENANCE Under normal circumstances the "MULTIBLOC" combination control valve should not require any maintenance. However, annual inspection and / or cleaning of the integral line strainer, pressure reducing valve, cartridge, expansion relief valve cartridge and seating may be necessary depending on local water conditions. -
Page 10: Electrical Installation
To comply with regulations governing the installation of indirect unvented cylinders, a motorised valve must be fitted in the primary flow. Your Aquaflow unit has been supplied with a two port motorised valve, which will act as a positive energy cut-out should the safety cut-out operate. The motorised valve will also control the temperature of the domestic stored water via the cylinder thermostat, which is located in the electrical box. - Page 11 ’S’ Plan systems Refer to the wiring diagrams contained within the boiler installation instructions for the wiring of ’S’- Plan systems. Connect the cylinder thermostat as shown in the diagram below S Plan System Schematic -10- Supplied By www.heating spares.co Tel. 0161 620 6677...
- Page 12 Y Plan Wiring Layout Refer to the wiring diagrams contained within the boiler installation instructions for the wiring of ’Y’- Plan systems. Connect the cylinder thermostat as shown in the diagram below NOTE A 10 way junction box must be used on the Y plan system. Y Plan System Schematic -11- Supplied By www.heating spares.co Tel.
- Page 13 Please note that the power to the Solar Pump from the solar controller must pass through solar thermostat Solar Thermal cut off AQUAFLOW FAULT FINDING GUIDE FAULT POSSIBLE CAUSE REMEDY No water flow from hot taps Mains supply off. Check and open stopcock.
- Page 14 Expansion relief valve not Check and replace if faulty. (See working correctly. page 6 of installation manual). NOTE: Disconnect electrical supply before removing any electrical equipment covers. AQUAFLOW FAULT FINDING GUIDE -13- Supplied By www.heating spares.co Tel. 0161 620 6677...
- Page 15 -14- Supplied By www.heating spares.co Tel. 0161 620 6677...
- Page 16 -15- Supplied By www.heating spares.co Tel. 0161 620 6677...
- Page 17 Notes: -16- Supplied By www.heating spares.co Tel. 0161 620 6677...
- Page 18 Commisioning Valve Non Return Valve Circulation Pump Secondary Return Line Balanced cold supply for showers or bidet only. All replacement parts must be supplied by Vokera. To obtain the address of a local stockist contact: Vokera Ltd. www.vokera.co.uk. Borderlake House...
- Page 19 Registered address: Vokèra Ltd Borderlake House Unit 7 Riverside Industrial Estate London Colney Herts AL2 1HG enquiries@vokera.co.uk www.vokera.co.uk www.vokera.ie Sales, General Enquires T 0844 391 099 F 0844 391 0998 Vokèra Ireland West Court, Callan Co Kilkenny T 056 7755057 F 056 7755060 Vokèra Limited reserve the right to change...
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