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UNVENTED MAINS PRESSURE WATER HEATER
100, 120, 150, 170, 210, 250 AND 300 LITRE
DIRECT AND INDIRECT MODELS
INSTALLATION AND SERVICING INSTRUCTIONS
Heatstore unvented water heater incorporating immersion heater(s) and thermal controls Factory
fitted Temperature/Pressure Relief Valve Cold Water Combination Valve Expansion Vessel
Expansion Vessel Mounting Bracket Tundish Motorised Valve (Indirect models only) Com-
pression nuts and olives Immersion heater spanner Installation Instructions
PACK CONTENTS
36 00 5944 Issue 1
1
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Table of Contents
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Summary of Contents for Heatstore HSUDC100
- Page 1 DIRECT AND INDIRECT MODELS INSTALLATION AND SERVICING INSTRUCTIONS PACK CONTENTS Heatstore unvented water heater incorporating immersion heater(s) and thermal controls Factory fitted Temperature/Pressure Relief Valve Cold Water Combination Valve Expansion Vessel Expansion Vessel Mounting Bracket Tundish Motorised Valve (Indirect models only) Com-...
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Page 2: Table Of Contents
HEATSTORE UNVENTED HOT WATER STORAGE CYLINDER INSTALLATION AND SERVICING INSTRUCTIONS. PLEASE LEAVE THIS MANUAL WITH THE UNIT FOR FUTURE REFERENCE. CONTENTS SECTION CONTENT PAGE INTRODUCTION GENERAL REQUIREMENTS INSTALLATION - GENERAL INSTALLATION - DIRECT UNITS . INSTALLATION – INDIRECT UNITS COMMISSIONING MAINTENANCE FAULT FINDING AND SERVICING . -
Page 3: General Requirements
7. Compression nuts and olives 8. Immersion heater key spanner 2.4 OUTLET/TERMINAL FITTINGS (TAPS, ETC.) The Heatstore HSU can be used with most types of 2.2 SITING THE UNIT terminal fittings. It is advantageous in many mixer show- The Heatstore HSU unvented water heater must be ers to have balanced hot and cold water supplies. -
Page 4: Installation - General
Cold Water Combination All pipe fittings are made via 22mm compression Valve and the Heatstore HSU (see Fig. 5). The loca- fittings directly to the unit. The fittings are threaded tion of the Expansion Vessel should allow access to 3/4”BSP male parallel should threaded pipe... - Page 5 COIL NOMINAL HEATING CAPACITY SURFACE TIME IMM. RATING RECOVERY (litres) AREA HTR. (mins) (kW) (mins) (sq.m) 0.43 12.5 0.55 16.4 0.61 16.0 0.68 18.3 0.79 20.0 0.79 20.0 FIG. 3 General Dimensions M ode l He a ting tim e 70% Re cove ry Note s 15 to 65de g.
- Page 6 Build- charges of water and 3m from any plastics guttering ing Control Officer or Heatstore. system that would collect such discharges (tundish visible). G3 REQUIREMENT “...there shall be precautions...to ensure that the hot...
- Page 7 The tundish should not be located adjacent to any • The Cold Water Combination Valve must be fitted electrical components. to the mains water supply to the Heatstore HSU unit. Va lve outle t size Minim um size of Minim um size of...
- Page 8 EXPANSION COLD WATER T&P RELIEF TO HOT VESSEL COMBINATION VALVE OUTLETS VALVE BALANCED MAINS COLD WATER WATER CONNECTION SUPPLY BOOST ELEMENT (IF REQUIRED) CONTROL HOUSING (HSUDC120 TO HSUDC300 MODELS ONLY) ELEMENT / ISOLATING CONTROLS VALVE (NOT HOUSING SUPPLIED) TUNDISH PRIMARY SECONDARY RETURN RETURN...
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Page 9: Installation - Direct Units
4.2 ELECTRICAL SUPPLY (FIG. 6) out to control the indirect heating source. The The Heatstore HSUDC100 litre units are fitted with Heatstore HSU MUST be earthed. one 3kW immersion heater, all other direct models are All wiring to the unit must be installed in accordance fitted with two 3kW immersion heaters as standard. - Page 10 INDIRECT CONTROLS Control terminal numbering may TERMINAL BLOCK differ from those shown. Refer to instructions with controls selected ZONE VALVE(DHW) ZONE VALVE (HTG) ROOM STAT (SUPPLIED) O GY O GY (SUPPLY) A DOUBLE POLE ISOLATING SWITCH MUST BE INSTALLED IN THE MAINS SUPPLY. 9 10 JUNCTION BOX ALL EARTH CONNECTIONS...
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Page 11: Commissioning
6.3 DIRECT UNITS CLARITY Switch on electrical supply to the immersion heater(s) and allow the Heatstore HSU to heat up to normal FIG. 9 Indirect thermostat and thermal cut- working temperature (60ºC recommended, approxi- mately graduation 4 on the thermostat). If necessary... -
Page 12: Maintenance
A key spanner 7.7 BENCHMARK LOG BOOK is supplied with the Heatstore HSU unit for easy re- On completion of any maintenance or service of the moval/tightening of the immersion heater(s). Over time Heatstore HSU the Benchmark “Installation, Com-... -
Page 13: Fault Finding And Servicing
Thermal Cut-out A full range of spare parts are available for the - Direct models Heatstore HSU range. Refer to the Technical Data la- Spare Part No: bel on the unit to identify the model installed and en- 95 612 599 sure the correct part is ordered. - Page 14 THE SAFETY VALVES OR CON- fied. Any work carried out on the Heatstore HSU unvented water heater and its associated controls T R O L S S U P P L I E D W I T H T H E...
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Page 15: User Instructions
9.3 TEMPERATURE CONTROLS – INDIRECT UNITS (Fig. 9) The Heatstore HSU Indirect units are fitted with an Indirect Thermostat and Thermal Cut-out. These con- trols must be wired in series with the 2 port motorised zone valve supplied to interupt the flow of primary water around the heat exchanger coil when the con- trol temperature has been reached. -
Page 16: Guarantee
Expansion Vessel charge pressure. This guarantee does not affect your statutory rights. The policy of Heatstore is one of continuous product development and, as such, we reserve the right to change specifications without notice. Island Park...
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