Instructions for Installation, Servicing and Use LEAVE THESE INSTRUCTIONS WITH THE END-USER Unvented Hot Water Storage Cylinders
TABLE OF CONTENTS 1. GENERAL INFORMATION 1.1 DELIVERY 2. INSTALLATION 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 2.10 2.11 2.12 WATER REGULATIONS BUILDING REGULATIONS HOW THE APPLIANCE WORKS OVERALL DIMENSIONS COLD WATER SUPPLY SITING AND FIXING CONNECTION OF MAINS WATER SUPPLY COLD WATER COMBINATION VALVE CONNECTION TO SERVICES SECONDARY RETURN DISCHARGE PIPEWORK ELECTRICAL DIAGRAMS 3. COMMISSIONING 4. MAINTENANCE 4.1 4.2 4.3 4.4 4.
1. GENERAL INFORMATION This manual is an integral and essential part of the product. It should be kept with the appliance so that it can be consulted by the user and our authorised personnel. Please read carefully the instructions and notices about the appliance contained in this manual, as they provide important information regarding the safe installation, use and maintenance of the cylinder. Failure to do so may invalidate the guarantee. 1.
2. INSTALLATION 2.1 WATER REGULATIONS These regulations (byelaws in Scotland) ensure a good supply of wholesome water, and that only approved materials, pipes and fittings are used to convey water. 2.2 BUILDING REGULATIONS These are a statutory document and take priority over all other regulations and recommendations. The installation of an unvented hot water storage cylinder is classified as a “Controlled Service” and Regulation G3 applies.
2.4 OVERALL DIMENSIONS 2.5 COLD WATER SUPPLY It is important to ensure that the cold water main is capable of supplying the increased demand which will be imposed on it. Hot and cold water are both drawn off the same source of supply. Remember, there will not be a storage tank to help compensate for variations in the demand on the system. A minimum pressure of approximately 1.5 bar and 20 litres per minute is required for satisfactory operation. 85% of UK dwellings have a mains pressure above 2.0 bar.
2.7 CONNECTION OF MAINS WATER SUPPLY For Contract, and High Capacity models: On the front of the unit there is a label to identify the connection ports. Please check this before making any connection to the unit. For units up to 300 litres it is recommended that all mains cold water supply pipe work is a minimum of 22mm, with the exception of model ST50 where 15mm can be used. For 500 litre models the supply should be 28mm.
CONTRACT STI 125-150-210-300 INDIRECT COMBINATION VALVE COLD MAINS-IN 22mm EXPANSION VESSEL PRESSURE + TEMPERATURE RELIEF VALVE HOT SUPPLY 22mm HIGH CAPACITY 500 STD UK DIRECT EXPANSION RELIEF PIPE SECONDARY RETURN TUNDISH COLD MAINS-IN 28mm ZONE VALVE COMBINATION VALVE FLOW EXPANSION VESSEL 22mm DRAIN HOT SUPPLY 28mm PRESSURE + TEMPERATURE RELIEF VALVE RETURN MAX. 100mm EXPANSION RELIEF PIPE FIG. 2.
2.8 COLD WATER COMBINATION VALVE The cold water combination valve can be connected either close by the unit or alternatively it may be installed in a remote position from the unit as there is no requirement to site it in close proximity to the cylinder. This allows a flexible and convenient installation. However, it is important to note allowances for the discharge pipe work from the expansion relief valve must be accounted for.
3/4” B.S.P. CONNECTION FOR EXPANSION VESSEL 22mm COLD MAINS IN 3.5 6 BAR SERVICEABLE 3/4” PRESSURE REDUCING CARTRIDGE AND LINE STRAINER (SET AT 3.5 BAR) 22mm TO WATER HEATER 15mm EXPANSION RELIEF OUTLET TO TUNDISH EXPANSION RELIEF VALVE (SET AT 6 BAR) 22mm COLD MAINS IN 22mm TO CYLINDER NON-RETURN VALVE (WITHIN HOUSING) 22mm BALANCED COLD WATER TAKE OFF WITH NON-RETURN VALVE FIG. 2.7 SERVICEABLE 1” PRESSURE REDUCING CARTRIDGE AND LINE STRAINER (SET AT 3.
2.9 CONNECTION TO SERVICES It is recommended that a 22mm pipe run should supply the outlets throughout the building, especially to baths and showers. Short runs of 15mm pipe may be used to connect basins and sinks. 2.10 SECONDARY RETURN On floor-standing models a secondary return may be fitted (consult the label on the face of the unit for the correct location).
consideration should be given to the installation of an electronically operated device to war n when discharge takes place. Note: The discharge will consist of scalding water and steam. Asphalt, roofing felt and non-metallic rainwater goods may be damaged by such discharges. Temperature & pressure relief valve Metal discharge pipe (D1) from temperature & pressure relief valve. to tundish. Tundish 500mm Max. 300mm Min. Discharge below fixed grating. (see page 10 for alternative points of discharge).
WARNINGS The outlet from the temperature & pressure relief valve must not be used for any other purpose. This also applies to the expansion relief valve. No other valve is to be fitted between the cold water combination valve and the cylinder. The temperature & pressure relief valve must not be removed in any circumstances. Any of the above will totally invalidate the guarantee. 2.12 ELECTRICAL CONNECTION The electrical installation must be in accordance with the current I.E.E. wiring regulations.
INFORMATION FOR THE END USER Proper operation of the protection system is shown by a continuous green L.E.D, indicating that the circuits terminals are being supplied with electricity. In the event of failure, a red L.E.D. indicates that there is a short-circuit between the electrode and the cylinder tank, that one of the leads (tank or electrode) is disconnected or that there is no water in the cylinder. Your appliance is thus properly protected when the green L.E.D. is illuminated and the red L.E.D.
2.11 ELECTRICAL DIAGRAM Should the Economy 7 system not to be used, a separate 13 amp supply to each element will be required. Through a double pole fused isolating switch having a contact gap of at least 3mm on each pole.The immersion heater shall be installed with 85°C rubber insulated HOFR-sheathed flexible cable complying with Table 8 of BS 6141: 1991. Make the connection(s) to the immersion heater(s) as per FIG. 2.12 and FIG. 2.13.
1 2 Cylinder thermostat Thermal cut-out P 1 8 P 6 2 Not used L N 240V MAINS INPUT (13 AMP) FIG. 2.
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3. COMMISSIONING Check for obvious signs of damage to the cylinder and controls, and also that the controls fitted correspond with the references quoted in these instructions. Ensure that the Drain Cock at the base of the appliance is closed before commencing.
4. MAINTENANCE To ensure efficient safe operation, it is recommended that the appliance is serviced annually by a competent person. After servicing, preliminary electrical system checks must be carried out to ensure electrical safety (i.e. polarity, earth continuity, resistance to earth and short circuit). 4.1 PROTECH ANTI-CORROSION SYSTEM WARNING: SWITCH OFF THE POWER SUPPLY BEFORE WORKING ON THE APPLIANCE. Trouble-shooting: 1) The green L.E.D.
4.2 THERMAL CUT-OUT(S) If the thermal cut-out has operated the cause must be found before resetting (see section 5). 4.3 IMMERSION HEATER(S) Descale the immersion heater(s) and remove any lime deposit from the cylinder. Replace in reverse order. THIS DOES NOT APPLY TO COMFORT MODELS. 4.
5. FAULT FINDING FAULT POSSIBLE CAUSES REMEDY 1) Mains cold water supply shut off Check and open Isolating and/or stop valve.
Kg mins bar kW m2 mins bar bar bar bar bar/°C bar V kW mm Wall Hung ST 50 12 3.5 3.5 6 7/90 3.5 240 3 480 (1) (3) 60 1.15 27 Wall Hung ST 80 12 3.5 3.5 6 7/90 3.5 240 3 480 (1) (3) 90 1.40 40 Wall Hung ST 100 12 3.5 3.5 6 7/90 3.5 240 3 480 (1) (3) 120 1.26 41 12 3.5 3.5 6 7/90 3.5 240 3 350 (1) (3) 120 1.
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MTS Benelux sa/nv - Belgium Commercial subsidiary: MTS (GB) LIMITED MTS Building Hughenden Avenue High Wycombe Bucks. HP13 5FT Telephone: (01494) 755600 Fax: (01494) 459775 Internet: www.ariston.co.uk E-mail: info@uk.mtsgroup.
