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WITH THE CUSTOMER FOR FUTURE REFERENCE. PACK CONTENTS The Santon PremierPlus unvented water heater incorporating immersion heater(s) and thermal controls l Factory fitted temperature/pressure relief valve l Cold water combination valve assembly l Expansion vessel and mounting bracket l Tundish l Motorised valve (indirect models...
INTRODUCTION The Santon PremierPlus cylinder is a purpose designed unvented water heater. The unit has a stainless steel inner vessel, which ensures an excellent standard of corrosion resistance. The outer casing is a combination of resilient thermoplastic mouldings and plastic coated corrosion proofed steel sheet. All products are insulated with CFC free polyurethane foam to give good heat loss performance.
The higher the available pressure and flow rate the better the system performance. The PremierPlus cylinder has an operating pressure of 3.5 bar which is controlled by the cold water combination valve assembly. The cold water combination valve assembly can be connected to a maximum pressure of 16 bar.
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). A stopcock or servicing valve should be incorporated into the cold water supply to enable the PremierPlus cylinder and its associated controls to be isolated and serviced.
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SECONDARY CIRCULATION If secondary circulation is required it is recommended that it be connected to the PremierPlus cylinder as shown in Fig. 3, page 6 via a swept tee joint into the cold feed to the unit. A swept tee joint is available as an accessory (order code no. 94 970 033).
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Fig 4 - General Dimensions Table 2 - Dimensions and Performance TYPE DIMENSIONS (mm) COIL NOMINAL HOT WATER HEATING TIME HEAT CAPACITY RATING DRAW-OFF DIRECT (mins) Direct Indirect UP TIME (litres) (kW) (Litres ) to (mins) 40°C 15.2 ...
INSTALLATION - DISCHARGE 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.
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Under no circumstances should the factory fitted temperature/pressure relief valve be removed other than by a competent person. To do so will invalidate any guarantee or claim. • The cold water combination valve assembly must be fitted on the PremierPlus water supply to the PremierPlus cylinder. •...
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Table 3 - Sizing of copper discharge pipe (D2) for common temperature relief valve outlet sizes Va lve outle t size Minim um size of Minim um size of Ma x im um Re sista nce discha rge pipe discha rge pipe re sista nce cre a te d by e a ch D2 from tundish...
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Fig 6 - Typical installation - schematic Balanced cold Cold water To hot outlets T&P relief Expansion Isolating valve water connection combination valve vessel (not supplied) (if required) valve Boost element/ control housing (PP120E to PP300E Mains water models only) supply Element/ controls...
SAFETY DISCONNECT FROM THE MAINS SUPPLY BEFORE REMOVING ANY COVERS. Never attempt to replace the immersion heater(s) other than with the recommended PremierPlus immersion heater(s). DO NOT BYPASS THE THERMAL CUT-OUT(S) IN ANY CIRCUMSTANCES. In case of difficulty contact service support; contact details available at the back of this booklet.
PRIMARY CIRCUIT CONTROL The 2 port motorised valve supplied with the PremierPlus cylinder MUST be fitted on the primary flow to the PremierPlus cylinder heat exchanger and wired in series with the indirect thermostat and thermal cut-out fitted to the unit. Primary circulation to the PremierPlus cylinder heat exchanger must be pumped;...
Open a hot tap furthest from the PremierPlus cylinder. • Open the PremierPlus stop cock to fill the unit. When water flows from the tap, allow to run for a few minutes to thoroughly flush through any residue, dirt or swarf, then close the tap.
MAINTENANCE 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.
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 PREMIERPLUS SYSTEM. IF A FAULT IS SUSPECTED CONTACT A COMPETENT INSTALLER.
SPARE PARTS A full range of spare parts are available for the PremierPlus cylinder range (See Table 5 Page 20). Refer to the technical data label on the unit to identify the model installed and ensure the correct part is ordered. You will need to quote the serial number which is printed on the data label.
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Table 4 - Fault finding chart Fault Possible Cause Remedy Mains water supply off Check and open stop cock Strainer blocked Turn off water supply. Remove strainer and No hot water flow clean Cold water combination valve incorrectly Check and refit as required fitted Direct immersion heater not switched on Check and switch on Direct immersion heater thermal cut-out...
SPARE PARTS A full range of spare parts are available for the PremierPlus range. Refer to the Techincal Data label on the unit to identify the model installed and ensure the correct part is ordered. Table 5 - Spares list DESCRIPTION PART NO.
The PremierPlus has only been used for the storage of wholesome water (max. 250mg/l chloride). The PremierPlus has not been subjected to frost, nor has it been tampered with or been subjected to misuse or neglect. No factory fitted parts have been removed for unauthorised repair or replacement.
HEAT LOSS Table 6: Standing heat losses (based on an ambient air temperature of 20°C and a stored water temperature of 65°C) Nominal Standing Heat Loss Capacity (Litres) per day per year (kWh/24h) (kWh/365d) 1.14 416.1 1.25 456.3 1.45 529.3 1.63 595.0 1.91...
Whiteinch Glasgow G14 0SY Tel: 0141 434 1530 The policy of PremierPlus is one of continuous product development and, as such, we reserve the right to change specifications and guarantee terms and conditions without notice. Customer Service Tel: 0844 871 1530...
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