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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 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...
USER INSTRUCTIONS GUARANTEE SPARES STOCKISTS 1.0 INTRODUCTION The Santon Premier Plus is a purpose designed This appliance complies with the requirements of unvented water heater. The unit has a stainless steel the CE marking directive and is WRAS approved to...
2. Factory fitted Temperature/Pressure Relief Valve the better the system performance. 3. Cold Water Combination Valve. The Santon Premier Plus has an operating pressure of 4. Expansion Vessel and mounting bracket. 3.5 bar that is controlled by the Cold Water Combina- 5.
Cold Water Combination All pipe fittings are made via 22mm compression Valve and the Santon Premier Plus (see Fig. 5). The fittings directly to the unit. The fittings are threaded location of the Expansion Vessel should allow access 3/4”BSP male parallel should threaded pipe connec-...
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TYPE DIMENSIONS (mm) COIL NOMINAL HEATING CAPACITY TIME E = DIRECT SURFACE RATING RECOVERY (litres) DIRECT B = INDIRECT AREA (kW) (mins) (mins) (sq.m) 315 354 493 784 0.43 11.8 315 354 615 906 0.43 12.5 315 354 800 1090 0.55 16.4 315 354 925 1216...
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Build- that would collect such discharges (tundish visible). ing Control Officer or Santon. iv. where a single pipe serves a number of discharges, such as in blocks of flats, the number served should...
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• Temperature/Pressure Relief Valve be removed other The discharge pipe should not be blocked or used than by authorised Santon personnel. To do so will for any other purpose. invalidate any guarantee or claim. • The tundish should not be located adjacent to any •...
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EXPANSION COLD WATER T&P RELIEF TO HOT VALVE VESSEL COMBINATION OUTLETS VALVE BALANCED MAINS COLD WATER WATER CONNECTION SUPPLY (IF REQUIRED) BOOST ELEMENT / CONTROL HOUSING (PP120E TO PP300E MODELS ONLY) ELEMENT / ISOLATING CONTROLS VALVE (NOT HOUSING SUPPLIED) TUNDISH PRIMARY SECONDARY RETURN...
(see UNITS Fig. 7). The Santon Premier Plus is compatible with most heating controls, examples of electrical circuits 5.1 PLUMBING CONNECTIONS are shown in Figs. 7 and 8. However, other systems Indirect units require the following pipework con- may be suitable, refer to the controls manufacturers’...
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PREMIER PLUS 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...
PressureRelief Valve during the heating cycle. immersion heater(s). An immersion heater key spanner is supplied for this purpose. • Ensure the drain cock is CLOSED. • Open a hot tap furthest from the Santon Premier INDIRECT THERMAL Plus. CUT-OUT RESET INDIRECT • BUTTON Open the mains stop cock to fill the unit.
7.0 MAINTENANCE screwdriver into one of the pockets on the immersion heater and gently lever up and down. Indirect models: 7.1 MAINTENANCE REQUIREMENTS Open the cover(s) to the immersion heater housing(s) Unvented hot water systems have a continuing main- and disconnect wiring from immersion heater(s). Re- tenance requirement in order to ensure safe working move thermostat capillary sensors from the pockets and optimum performance.
95 612 698 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 un- vented water heating systems. • Any spare parts used MUST be authorised Santon parts.
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MUST be carried out by INVALIDATE ANY GUARANTEE 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). TABLE 5 Fault Finding Chart...
9.3 TEMPERATURE CONTROLS – INDIRECT UNITS (Fig. 9) The Santon Premier Plus Indirect units are fitted with an Indirect Thermostat and Thermal Cut-out. These controls must be wired in series with the 2 port mo- torised zone valve supplied to interupt the flow of primary water around the heat exchanger coil when the control temperature has been reached.
Unit 3A, 780 South Street, Whiteinch, Glasgow, G14 0SY Tel: 0141 434 1530 The policy of Santon is one of continuous product development and, as such, we reserve the right to change specifications without notice. SANTON Hurricane Way, Norwich, Norfolk, NR6 6EA...
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