Related Manuals for REMEHA Flexistor 400
Summary of Contents for REMEHA Flexistor 400
- Page 1 7038477_issue _01 Installation Manual Unvented Flexistor Water Heaters Installation & Servicing Instructions...
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Page 3: Table Of Contents
Important Please read & understand all these instructions before commencing installation. This cylinder range does not incorporate an internal heat exchanger. Please leave this manual with the customer for future reference. page 1 Contents Product Specification Introduction General requirements THE BENCHMARK™ SCHEME Checklist Storage and handling Technical data... -
Page 4: Product Specification
Fault finding Servicing Spares Accessories Spares drawings Benchmark check list Service Record Warranty Lifetime Warranty Terms and Conditions THE BENCHMARK™ SCHEME Benchmark™ places responsibilities on both manufacturers and installers. The purpose is to ensure that customers are provided with the correct equipment for their needs, that it is installed, commissioned and serviced in accordance with the manufacturer's instructions by competent persons and that it meets the requirements of the appropriate Building Regulations. -
Page 5: General Requirements
Building Regulation Part L. The Remeha Flexistor unvented water heater can be fed directly from the cold water mains supply to the property without the need for separate feed cisterns or vent pipes. It is supplied complete with all its necessary inlet and safety controls. - Page 6 3 Checklist (if purchased through Heatrae Sadia) Before commencing installation check that all the components for your Remeha Flexistor unit are contained in the package. The following components are supplied as standard with your Remeha Flexistor unit: Commercial...
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Page 7: Storage And Handling
To aid installation, the Remeha Flexistor is provided with lifting points located at the top of the unit. To access the lifting eyes please remove the red outlet grommet and the top cover. The weights of the units are noted on Table 5. - Page 9 FIGURE 1: Lifting page 5 Technical data (Indirect models in conformance with BS EN 12897:2016) Maximum mains water supply pressure 2.5MPa (25 bar) Operating pressure/PRV 0.60MPa (6. bar) Expansion vessel pressure 1.0MPa (10 bar max) Expansion relief valve setting 0.8MPa (8 bar) Maximum design pressure 0.80MPa (8 bar) T&P relief valve setting...
- Page 11 FIGURE 2: Flexistor Dimensions Connection 400 - Connection 800 - 1000L Connection 1250 - Connection 2000 - 500L 1450L 2500L A 2" BSP 2" BSP 2" BSP 2" BSP B ½" BSP ½" BSP ½" BSP ½" BSP C ½" BSP 1138 1416 ½"...
- Page 13 FIGURE 3: Flexistor Connections NOTE: All connections BSP female threads Nominal Unit Weight (kg) Capacity Empty Full (Litres) 1000 1180 1250 1547 1450 1754 2000 2415 2500 2921 Table 5: Cylinder Weights page 8 Nominal Per Day Per Year Capacity (kWh/24h) (kWh/24h) (Litres)
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Page 14: Immersion Allocation Table
Nominal Maximum kW ratings Capacity Lower boss Upper boss Total kW (Litres) 1000 1250 1450 2000 2500 Table 7: Maximum kW ratings for auxiliary heating supply Nominal Heat-Up Times Nominal Heat-Up Times Capacity Capacity Maximum kW Heat-up Maximum kW Heat-up (Litres) (Litres) Time (mins) - Page 15 Table 9: Immersion allocation Note: The Immersion (s) are not factory fitted . Thermostat Cut-out All immersion2000heaters are fitted with a thermostat which is fitted in the centre oft he heater plate and a cut-out which is fitted to the side of the thermostat.
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Page 16: Wiring Schematics
FIGURE 4: Thermostat and thermal cut-out settings page 10 Wiring Schematic Single phase wiring schematic... - Page 17 Note: The 2 external contactors must be approved components certified for 10,000 cycles of operation for the contactor controlled by the thermostat and at least 30 for the contactor controlled by the non-self-resetting thermal cut-out. FIGURE 5: Single phase wiring schematic 3 phase wiring schematic...
- Page 18 FIGURE 6: 3 phase wiring schematic page 11...
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Page 19: Limitations
The water supply must be of wholesome water quality (Fluid Category 1 as defined by the Water Supply Regulations 1999). The Remeha Flexistor is to be used for the storage of wholesome water (max. 250mg/l chloride). -
Page 20: Cold Water Supply
Pressure reducing valve The pressure reducing valve can be connected anywhere on the cold water mains supply prior to the Remeha Flexistor unit. There is no requirement to site it close to the unit, it can be located at a point where the mains supply enters the premises if this is more convenient but you must install a non-return valve just after the reducing valve for ease of maintenance. - Page 21 Figure 7: Cold water combination valve (for 400 & 500ltr)
- Page 23 Figure 8: External heat source Thermal Cut-out page 14...
- Page 25 Outlet Pipe work Ideally the pipe work from the Remeha Flexistor to the outlet fittings should be in 2" pipe, smaller bore pipe can be used but it could impact on the performance of the unit. Small bore pipe can also be used to suit some taps, but runs should be of minimum length. Pipe sizes may vary due to system design.
- Page 26 required during this period cold water may be discharged from the hot outlet. It is recommended that a check valve be installed before the pump to stop any risk of cold water draw off through the pump when it is not in use. For guidance on installation please refer to Figure 9. External heat source If an external heat source is connected the cylinder the control to the heat source must be wired via the over temperature cut-out supplied with the cylinder, alternatively it can be wired to the Primary circulation pump.
- Page 27 3.55 Any discharge should be visible at the tundish. In addition, where discharges from safety devices may not be apparent, e.g. in dwellings occupied by people with impaired vision or mobility, consideration should be given to the installation of a suitable safety device to warn when discharge takes place, e.g.
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Page 28: Discharge Pipe Work
Notes: 1. Plastic pipes should be joined and assembled with fittings appropriate to the circumstances in which they are used as set out in BS EN ISO 1043-1:2002 Plastics. Symbols and abbreviated terms. Basic polymers and their special characteristics. 2. Where pipes cannot be connected to the stack it may be possible to route a dedicated pipe alongside or in close proximity to the discharge stack. - Page 29 To do so will invalidate any guarantee or claim. 2. The Cold Water Combination Valve must be fitted to the mains water supply to the Remeha Flexistor unit. 3. No control or safety valves should be tampered with or used for any other purposes.
- Page 30 28mm 35mm UP TO 9m 1.4m 42mm UP TO 18m 1.7m 54mm UP TO 27m 2.3m Table 10 Sizing of copper discharge pipe "D2" for common T&P Relief Valve sizes.
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Page 32: Commissioning
Immersion Heater(s) The Remeha Flexistor can be fitted with a selection of single phase and three phase immersion heaters (see Table 7, and element allocation Table 9, for details). The immersion heaters must be installed in accordance with the installation instructions supplied with the immersion heater... - Page 33 The customer should then countersign the Benchmark™ commissioning checklist to accept completion. The Service Record should be filled in when any subsequent service or maintenance operation is carried out on the Remeha Flexistor unit.
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Page 34: Maintenance & Servicing
Flexistor unit. Attach a hosepipe to the drain valve having sufficient length to take water to a suitable discharge point below the level of the unit, at least one metre below the unit is recommended. Open hot water tap nearest to the Remeha Flexistor to relieve the system pressure. Open drain... - Page 35 Refit in reverse order. Do not over tighten. Warnings IF WATER DISCHARGES FROM THE TEMPERATURE / PRESSURE RELIEF VALVE ON THE Remeha Flexistor UNIT REFER TO FAULT FINDING TABLE FIRST FOR GUIDANCE. IF THIS DOES NOT RECTIFY THE FAULT SWITCH OFF ELECTRICAL SUPPLY TO THE IMMERSION HEATER(S) [AUXILIARY HEATING] OR SHUT DOWN THE EXTERNAL HEAT SOURCE [IF CONNECTED].
- Page 36 The Fault Finding chart will enable operational faults to be identified and their possible causes rectified. Any work carried out on the Remeha Flexistor unvented water heater and its associated controls MUST be carried out by a competent installer for unvented water heating systems. In case of doubt contact the Remeha Flexistor Service Department.
- Page 37 25 Spare parts A full range of spare parts are available for the Remeha Flexistor range. Refer to the Technical Data label on the unit to identify the model installed and ensure the correct part is ordered. Key Description...
- Page 38 Single Check Valve 2" 95605191 Expansion Relief Valve 1" X 1 1/4" Set Pressure 8 Bar 95605192 Expansion Relief Valve 1 1/4" X 1 1/2" Set Pressure 8 Bar 95605194 Temperature And Pressure Relief Valve - 1 1/4" 10 Bar 7033371 Temperature And Pressure Relief Valve - 3/4"...
- Page 39 Pressure gauge 95970142 Temperature gauge (calibrated) 95970017 Pressure gauge (calibrated) 95970016 Flexistor 400/500L 6 bar cold water control kit 7038498 Flexistor 800L 6 bar cold water control kit 7038499 Flexistor 1000L 6 bar cold water control kit 7038500 Flexistor 1250L 6 bar cold water control kit...
- Page 40 Part No: 95:611:025 Part No: 95:607:396 10-45 Part No: 95:607:_ _ _ Part No: 95:605:_ _ _...
- Page 41 11-14 Part No: 95:605:_ _ _ Part No: 95:605:182 17-22 Part No: 95:607:452 Part No: 95:605:_ _ _ page 28...
- Page 42 23-25 26-29 Part No: 95:605:_ _ _ Part No: 95:605:_ _ _ 30-31 Part No: 95:605:_ _ _ Part No: 95:612:650...
- Page 43 Part No: 7031593 Part No: 95:980:025 35-36 Part No: 95:607:_ _ _ Part No: 95:605:177...
- Page 44 Part No: 95:607:690 Part No: 95:980:009 page 29...
- Page 45 page 30...
- Page 47 page 31 MAINS PRESSURE HOT WATER STORAGE SYSTEM COMMISSIONING CHECKLIST...
- Page 49 page 32 SERVICE RECORD It is recommended that your hot water system is serviced regularly and that the appropriate Service Record is completed. Service Provider Before completing the appropriate Service Record below, please ensure you have carried out the service as described in the manufacturer’s instructions.
- Page 51 Warranty Terms Remeha guarantees the water heater cylinder against faulty manufacture or materials for a period of two years from the date of purchase including parts and labour. This two year guarantee is extended to five years for the cold water control valve and to 25 years (from the date of installation) for the stainless steel inner vessel.
- Page 52 Warranty claims have no delaying effect on the payment dates and other demands Your Remeha warranty covers you for a equivalent replacement and labour in the event that the unit fails prematurely as a result of a proved manufacturing defect.
- Page 53 page 36...
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