Instructions for Installation and Use uniSTOR Unvented hot water storage cylinder GB VIH GB 125 S VIH GB 155 S VIH GB 180 S VIH GB 210 S VIH GB 260 S VIH GB 310 S
Contents Page Page 1 Description . . . . . . . . . . . . . . . . . . . . . . 3 6 Commissioning . . . . . . . . . . . . . . . . . . . 20 1.1 1.2 1.3 1.4 1.5 DHW Temperature Control . . . . . . . . . . . . . . . . CH Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Immersion Heater . . . . . . . . . . . . . . . . . . . . . . . Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . Typical applications . . . . . . . . . . . . . . . . . . . . . . 3 3 3 3 3 6.1 6.2 6.
Description 1 1 Description The uniSTOR range of unvented hot water storage cylinders are indirectly heated cylinders which are designed for use with UK standard boilers in hot water supply systems. uniSTOR cylinders are available in six sizes; 125, 155, 180, 210, 260 and 310 litre. The cylinders are of stainless steel construction, insulated with EPS and enclosed in a decorative casing. They are supplied with all necessary cold and hot water controls and a 2 port valve for control of domestic hot water.
2 Technical data 2 Technical data Size VIH GB 125 S VIH GB 155 S VIH GB 180 S VIH GB 210 S VIH GB 260 S VIH GB 310 S Unit 125 litres 155 180 210 260 310 Maximum water supply pressure 10 bar Operating pressure 3.5 bar Pressure reducing valve 3.5 bar Expansion relief valve 6.0 bar Expansion vessel charge pressure 4.0 bar T/P valve 95 / 7.
VIH GB 310 S Cylinder Heat Up Times 60 VIH GB 260 S 70 50 VIH GB 210 S 60 40 VIH GB 180 S 50 VIH GB 155 S 30 40 VIH GB 125 S 30 20 20 10 12 15 20 25 30 Reheat time for 70 % of cylinder contents (minutes) Approximate cylinder heat up time 15 °C to 65 °C (minutes) Technical data 2 35 38 Heat input to cylinder (kW) Fig.
3 Instructions for use 3 Instructions for use 3.1 Introduction Your Vaillant uniSTOR unvented hot water cylinder and Vaillant boiler, together provide you with a modern, efficient, high performance heating and hot water system. Because your uniSTOR hot water cylinder is supplied with water directly from the mains, you get the benefit of mains pressure hot water at your hot taps, without the need for storage tanks in the loft and without a hot water pump.
Instructions for use 3 3.4 Immersion heater 3.5 Important notes The electric immersion heater behind the front panel is provided as a back up means of water heating and is not intended for use at the same time that the boiler is heating the cylinder. Shutting down the uniSTOR cylinder To shut down the heating and hot water system for short periods, simply turn off the boiler as shown in the instructions supplied with the boiler.
4 Note To Installers 4 Note To Installers This product has been assessed and found to comply with the requirements of the Building Regulations for unvented hot water storage systems and must not be altered or modified in any way. The installation must be carried out by a competent person and be in accordance with the relevant requirements of the Local Authority, Building Regulations, Building Regulations (Scotland), Building Regulations (Northern Ireland), and the bye-laws of the local Water Undertaking.
Installation 5 5 Installation 5.1 Installation requirements In order to minimise frictional losses minimum 22 mm bore is recommended for new cold mains supply pipework into the dwelling although satisfactory performance can be achieved with 15 mm bore pipework. 5.1.
5 Installation Example 22 mm discharge pipe having 4 elbows and a length of 7 m from the tundish to the discharge point: Resistance for 4 elbows at 0.8 m each = 3.2 m Resistance of discharge pipe = 7.0 m Total Resistance = 10.2 m The total resistance of the discharge pipework is greater than the maximum allowed for 22 mm pipework (9 m). Therefore calculate the next largest size.
Installation 5 5.2 Dimensions 1 7 h a b 2 g 3 4 5 1 2 3 4 5 6 7 598 554 e d c f 6 45° DHW outlet Temperature and pressure relief valve Immersion heater Primary flow Cold water mains inlet Primary return Additional immersion heater (for uniSTOR 260 and 310; as accessory) Fig.
5 Installation 5.3 Functional diagrams DHW 2 4 M 3 1 A B M 5 Fig.
Installation 5 10 7 5 4 6 1 3 2 8 9 Fig.
5 Installation 5.4 Installation procedure • Unpack the uniSTOR cylinder and check the contents • (detailed in section 4: notes to installers). Position the uniSTOR in accordance with section 5.1.1: Siting • Install the drain valve in the cold mains supply • 5.4.1 Primary pipework To prevent the uniSTOR from overheating the 2 port motorised valve supplied with the boiler must be fitted to the primary flow to the indirect coil (see figure 5).
Installation 5 The Vaillant uniSTOR is provided with an external expansion vessel. • Connect the expansion vessel to the installed water controls by either: i. Screwing the vessel directly into the control assembly at the purpose provided connection (1, fig. 8) or, ii. Connecting the vessel to the control assembly via copper pipe or a suitable approved flexible connection hose, ensuring that the vessel is adequately supported. Use the supplied Expansion Vessel Mounting Kit for wall installation. 5.4.
5 Installation 5.4.5 Electrical Connections and Controls Important: The immersion heater incorporates an energy cut-off device and must not under any circumstances be replaced by a standard immersion heater. All electrical connections conform to BS. The position of the discharge pipes (tundish), drain valves and motorised valves etc. shall be positioned away from any electrical components. 5.4.5.1 Immersion Heater The uniSTOR VIH 125 - 310 cylinders are equipped with a factory fitted immersion heater.
Installation 5 • Connect the 2 port valve flying lead to the terminals All internal wiring is factory mounted. The thermostat which controls the DHW temperature (1, fig. 10) is adjustable between 20 and 65 °C. The built in safety thermal cut out operates at 90 °C. Should the thermal cut out be brought into operation, the motorized 2 port valve will be operated and shut the primary flow to the cylinder. Press the reset button (2, fig. 10) to reset thermal cut out and motorised valve. of the wiring box.
5 Installation Lifestyle LP241, LP 522, LP 722 Tempus 6, Tempus 7 Danfoss Randall CP 715, FP715 Note: *Earth not required Link L - 2 - 5 Grässlin Towerchron QE2 Honeywell ST699B, ST799A Note: Horstmann Channel Plus H21, H27 *Earth not required Link L - 2 - 5 Siemens-Landis & Staefa RWB2, RWB9 Potterton Myson EP 2002, EP 3002, EP 6002 Note: 1 2 3 4 5 3 not used 6 4 E N L 1 2 3 4 5 3 not used 7 6 E N L 1 2 3 4 * 5 3 not used 7 6 E N L 1 2 3 4 5 * 5 3 7 n
Installation 5 5.4.5.
6 Commissioning 6 Commissioning 6.2 Filling the Primary Circuit 6.1 Filling Secondary DHW Circuit Note: Do not manually open the temperature and pressure relief valve or expansion relief valve for venting purposes (any foreign matter in the pipework may cause damage to the valve seats). Note: Do not use boiler pressure relief valve for venting purposes. • The complete primary CH system must be flushed out • Ensure that the cylinder drain valve (9, fig. 6) is closed.
6 Commissioning 6.3 Operating the Boiler • Ensure the boiler mains switch is turned on. • Ensure that the programmer and thermostats are • • • calling for heat. Check that the boiler fires and heats the cylinder contents and the radiators according to the DHW and room thermostat settings. Carry out the commissioning and testing procedures detailed in the installation instructions supplied with the boiler.
8 Fault finding 8 Fault finding Note: Only genuine spare parts supplied by Vaillant Limited must be used. Fault A: The water from the cylinder is cold. Does boiler operate? NO Do external controls function? YES Remedy fault according to boiler instructions. NO Remedy fault according to controls instructions. YES Is 2-port valve in correct position? (DHW position). NO YES Does cylinder thermostat operate? NO Replace cylinder thermostat.
Fault finding 8 Fault B: Water discharging from expansion relief valve. Manually reset / seat expansion relief valve. Is discharge still occuring? NO YES Is the discharge occuring only when the cylinder is being heated? NO YES Check pressure charge NOT OK in expansion vessel Reset pressure in expansion vessel Does pressure hold? YES OK Exchange expansion relief valve. NO Turn off boiler and immersion heater.
8 Fault finding Fault C: Water discharging from temperature/ pressure relief valve (TPRV). Manually reset the TPRV. Is discharge still occuring? NO YES YES Check temperature control of boiler. Is discharge occuring only when the boiler is in use? OK NO Is discharge occuring only when the immersion heater is in use? Does 2-port valve change to heating position when cylinder reaches temperature? YES NO Check operation of cylinder thermostat and thermal cut out YES Replace TPRV.
Fault finding 8 Fault D: Deteriorating water pressure and flow from hot water terminal fittings. Check incoming main water pressure. Poor Inform customer to have water service checked by water undertaker. Dirty Clean / replace strainer. Faulty Replace faulty valve. OK Check line strainer (in pressure limiting valve). OK Check pressure limiting valve. OK Check sytem for blockage. Blocked Replace / clear blocked components.
00 2000 5468_00GB 03 2005 • Subject to alteration • Printed in Germany Head Office: Vaillant Ltd.
