UNVENTED MAINS PRESSURE WATER HEATER 100, 120, 150, 170, 210, 250 AND 300 LITRE DIRECT AND INDIRECT MODELS INSTALLATION AND SERVICING INSTRUCTIONS PACK CONTENTS Premier Plus 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) Compression nuts and olives Immersion heater spanner Installation Instructions 36 00
SANTON PREMIER PLUS INSTALLATION AND SERVICING INSTRUCTIONS. PLEASE LEAVE THIS MANUAL WITH THE UNIT FOR FUTURE REFERENCE. CONTENTS SECTION CONTENT 1 INTRODUCTION 2 . PAGE . . . . . . 2 GENERAL REQUIREMENTS . . . . . . 3 3 INSTALLATION - GENERAL . . . . . . 4 4 INSTALLATION - DIRECT UNITS . . . . . . 9 5 INSTALLATION – INDIRECT UNITS . . . . . 9 6 COMMISSIONING . . . . . . . 11 7 MAINTENANCE . . . . . . .
2.0 GENERAL REQUIREMENTS 2.1 COMPONENTS SUPPLIED 1. Premier Plus unvented water heater incorporating immersion heater(s) and thermal controls 2. Factory fitted Temperature/Pressure Relief Valve 3. Cold Water Combination Valve. 4. Expansion Vessel and mounting bracket. 5. Tundish. 6. Motorized Valve (Indirect models only). 7. Compression nuts and olives 8. Immersion heater key spanner 2.2 SITING THE UNIT The Santon Premier Plus must be installed vertically.
3.0 INSTALLATION – GENERAL (FIGS 3 & 5) 3.1 PIPE FITTINGS All pipe fittings are made via 22mm compression fittings directly to the unit. The fittings are threaded 3/4”BSP male parallel should threaded pipe connections be required. 3.2 COLD FEED A 22mm cold water supply is recommended however, if a 15mm (1/2”) supply exists which provides sufficient flow this may be used (although more flow noise may be experienced).
TYPE NOMINAL CAPACITY E = DIRECT (litres) B = INDIRECT DIMENSIONS (mm) A B 306 354 306 354 306 354 306 354 306 354 306 354 306 354 C 493 493 615 615 800 800 925 925 1184 1184 1391 1391 1715 1715 COIL D 784 784 906 906 1090 1090 1216 1216 1474 1474 1726 1726 2040 2040 SURFACE AREA (sq.m) RATING (kW) HEATING TIME RECOVERY DIRECT (mins) (mins) 100 E 100 B 315 0.43 11.8 120 E 120 B 315 0.43 12.5 150 E 150 B 315 0.55 16.4 170 E 170 B 315 0.61 16.0 210 E 210 B 315 0.68 18.3 250 E 250 B 315 0.79 20.
3.8 DISCHARGE PIPEWORK It is a requirement of Building Regulation G3 that any discharge from an unvented system is conveyed to where it is visible, but will not cause danger to persons in or about the building. The tundish and discharge pipes should be fitted in accordance with the requirements and guidance notes of Building Regulation G3. The G3 Requirements and Guidance section 3.9 are reproduced in the following sections. Information Sheet No.
3.9 WARNINGS • Under no circumstances should the factory fitted Temperature/Pressure Relief Valve be removed other than by authorised Santon personnel. To do so will invalidate any guarantee or claim. • The Cold Water Combination Valve must be fitted to the mains water supply to the Premier Plus unit. Va lve outle t size Minim um size of discha rge pipe D1 G1/2 15mm G3/4 22mm G1 28mm • No control or safety valves should be tampered with.
T&P RELIEF VALVE TO HOT OUTLETS EXPANSION VESSEL BOOST ELEMENT / CONTROL HOUSING (PP120E TO PP300E MODELS ONLY) COLD WATER COMBINATION VALVE BALANCED MAINS COLD WATER WATER CONNECTION SUPPLY (IF REQUIRED) ELEMENT / CONTROLS HOUSING ISOLATING VALVE (NOT SUPPLIED) PRIMARY RETURN TUNDISH SECONDARY RETURN TAPPING (IF REQUIRED) PRIMARY FLOW DISCHARGE PIPE DRAIN COCK (NOT SUPPLIED) NOTE: PRIMARY HEATING COIL FITTED ON PP100B TO PP300B MODELS ONLY INLET FIG.
4.0 INSTALLATION - DIRECT UNITS 4.1 PLUMBING CONNECTIONS Direct units require the following pipework connections. • Cold water supply to and from inlet controls. • Outlet to hot water draw off points. • Discharge pipework from valve outlets to tundish. 4.2 ELECTRICAL SUPPLY (FIG. 6) 100 litre direct Premier Plus units are fitted with one 3kW immersion heater, all other direct models are fitted with two 3kW immersion heaters as standard.
PREMIER PLUS TERMINAL BLOCK Control terminal numbering may differ from those shown. Refer to instructions with controls selected 2 1 3 ZONE VALVE (HTG) G Br 1 Bl O 2 2 L N ZONE VALVE(DHW) (SUPPLIED) ROOM STAT 3 1 GY 3 2 G 2 1 Br Bl GY O 2 3 (SUPPLY) ADOUBLE POLE ISOLATING SWITCH MUST BE INSTALLED IN THE MAINS SUPPLY.
6.0 COMMISSIONING 6.1 FILLING THE UNIT WITH WATER • Check Expansion Vessel pre-charge pressure. The vessel is supplied pre-charged to 3.5 bar to match the control pressure of the Pressure Reducing Valve. The pre-charge pressure is checked using a car tyre gauge by unscrewing the plastic cap opposite the water connection. • Check all connections for tightness including the immersion heater(s). An immersion heater key spanner is supplied for this purpose. • Ensure the drain cock is CLOSED.
7.0 MAINTENANCE 7.1 MAINTENANCE REQUIREMENTS Unvented hot water systems have a continuing maintenance requirement in order to ensure safe working and optimum performance. It is essential that the Relief Valve(s) are periodically inspected and manually opened to ensure no blockage has occurred in the valves or discharge pipework. Similarly cleaning of the strainer element and replacement of the air in the Expansion Vessel will help to prevent possible operational faults.
8.0 FAULT FINDING AND SERVICING 8.1 IMPORTANT • Servicing should only be carried by authorised Santon Service Engineers or Agents or by competent installers in the installation and maintenance of unvented water heating systems. • Any spare parts used MUST be authorised Santon parts. • Disconnect the electrical supply before removing any electrical equipment covers. • NEVER bypass any thermal controls or operate system without the necessary safety valves.
8.3 FAULT FINDING The Fault Finding chart below will enable operational faults to be identified and their possible causes rectified. Any work carried out on the Premier Plus 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 Santon Service Department (see contact details at foot of page 16).
9.0 USER INSTRUCTIONS 9.1 WARNINGS IF WATER ISSUES FROM THE TEMPERATURE/PRESSURE RELIEF VALVE ON THE SANTON PREMIER PLUS SWITCH OFF ELECTRICAL SUPPLY TO THE IMMERSION HEATER(S) (DIRECT UNITS) OR SHUT DOWN THE BOILER (INDIRECT UNITS). DO NOT TURN OFF ANY WATER SUPPLY. CONTACT A COMPETENT INSTALLER FOR UNVENTED WATER HEATERS TO CHECK THE SYSTEM. DO NOT TAMPER WITH ANY OF THE SAFETY VALVES FITTED TO THE SANTON PREMIER SYSTEM. IF A FAULT IS SUSPECTED CONTACT A COMPETENT INSTALLER. 9.
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