Instructions for Installation, Servicing and Use Unvented Hot Water Storage Cylinders Country of destination: GB/IE
TABLE OF CONTENTS 1. THE BENCHMARK SCHEME Page 2 2. 2.1 2,2 2.3 GENERAL INFORMATION Guarantee How the Appliance Works Delivery Page 3 Page 3 Page 3 Page 4 3. 3.1 3.2 3.3 3.4 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.
2. 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/or 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.
The factory fitted temperature & pressure relief valve at the top of the cylinder is a safety device to back-up the thermostat(s) and thermal cutout(s). It works by sensing an excess in water temperature or pressure and releasing the hot water into a discharge tundish and drain. The cylinder will only work in the vertical position. The inlet pipe needs to deliver cold water to the bottom of the tank. When water is heated it expands. To accommodate this increase in volume an expansion vessel is provided.
valve and tundish), 2 x motorised valves (non-high temperature), 2 x Immersion heaters and thermostats with thermal cut-out, 2 x cylinder thermostats with thermal cut-out, 1 x elongated thermostat pocket (for solar applications), feet (x3), expansion vessel mounting bracket and hose, instructions for installation, servicing and use and the Benchmark Log Book. 3. INSTALLATION 3.1 WATER REGULATIONS 3.2 BUILDING REGULATIONS 3.
3.6 SITING AND FIXING 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.
Storage Contract STI 125 Contract STI 150 Contract STI 210 Contract STI 300 500 STI ProTech 125 l 150 l 200 l 300 l 495 l 125 l 150 l 200 l 300 l 495 l Floor Standing Contract STD 125 Contract STD 150 Contract STD 210 Contract STD 300 500 STD ProTech INDIRECT RANGE 50 l 75 l 100 l Capacity DIRECT RANGE Wall-hung ST 50 ProTech ST 80 ProTech ST 100 ProTech Model 3/4” 3/4” 3/4” 3/4” 1" 3/4” 3/4” 3/4” 3/4" 1” 1/2” 3/4” 3/4” Inlet Outlet Units Pipe Size ST ProTech 50-80-100 0.75 0.9 0.9 0.9 1.
PRIMO ITI 100 PRIMO ITI 125 PRIMO ITI 150 PRIMO ITI 175 PRIMO ITI 210 PRIMO ITI 250 PRIMO ITI 300 PRIMO ITSI 210 (top/bottom) PRIMO ITSI 250 (top/bottom) PRIMO ITSI 300 (top/bottom) INDIRECT RANGE PRIMO ITD 100 PRIMO ITD 125 PRIMO ITD 150 PRIMO ITD 175 PRIMO ITD 210 PRIMO ITD 250 PRIMO ITD 300 DIRECT RANGE Model Storage 100l 125l 150l 175l 200l 250l 300l 200l 250l 300l 100 l 125 l 150 l 175 l 200 l 250 l 300 l Capacity 3/4" 3/4” 3/4” 3/4” 3/4” 3/4” 3/4” 3/4” 3/4” 3/4” 3/4” 3/4” 3/4” 3/4” 3/4” 3
3.8 CONNECTION OF MAINS WATER SUPPLY For floor standing 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 ST 50 ProTech where 15mm can be used. For 500 litre models the supply should be 28mm.
STD 125-150-210-300 DIRECT ITD 125-150-175-210-250-300 DIRECT ST PROTECH 50-80-100 PRESSURE + TEMPERATURE RELIEF VALVE COMBINATION VALVE COLD MAINS-IN 22mm COLD MAINS-IN 15/22mm EXPANSION VESSEL COMBINATION VALVE 15mm EXPANSION VESSEL PRESSURE + TEMPERATURE RELIEF VALVE HOT SUPPLY 22mm HOT SUPPLY 15/22mm EXPANSION RELIEF PIPE EXPANSION RELIEF PIPE SECONDARY RETURN TUNDISH TUNDISH 22mm 22mm MAX. 100mm DRAIN MAX. 100mm FIG. 3.2 FIG. 3.
ITSI 210-250-300 INDIRECT (LINKED COILS) 500 STI PROTECH COLD MAINS-IN 28mm COMBINATION VALVE COMBINATION VALVE COLD MAINS-IN 22mm EXPANSION VESSEL EXPANSION VESSEL HOT SUPPLY 28mm PRESSURE + TEMPERATURE RELIEF VALVE PRESSURE + TEMPERATURE RELIEF VALVE HOT SUPPLY 22mm EXPANSION RELIEF PIPE FLOW ZONE EXPANSION RELIEF VALVE PIPE SECONDARY RETURN RETURN TUNDISH SECONDARY RETURN ZONE VALVE TUNDISH FLOW FLOW 22mm 22mm DRAIN DRAIN RETURN RETURN MAX. 100mm MAX. 100mm FIG. 3.6 FIG. 3.
3.9 COLD WATER COMBINATION VALVE The cold water combination valve may be fitted in close proximity to the cylinder, or alternatively, it may be separated to allow the pressure reducing valve where the mains supply enters the property allowing for balanced cold water throughout the whole property whilst the 6 bar safety valve is fitted in close proximity to the cylinder.
3/4” B.S.P. CONNECTION FOR EXPANSION VESSEL 22mm COLD MAINS IN 22mm TO WATER HEATER 15mm EXPANSION RELIEF OUTLET TO TUNDISH SERVICEABLE 3/4” PRESSURE REDUCING CARTRIDGE AND LINE STRAINER (SET AT 3.5 BAR) 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. 3.
3.10 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. 3.11 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).
The single common discharge pipe should be at least one pipe size large than the largest individual discharge pipe to be connected. If unvented hot water storage systems are installed where discharges from safety devices may not be apparent i.e. in dwellings occupied by the blind, infirm or disabled people, consideration should be given to the installation of an electronically operated device to warn when discharge takes place. Note: The discharge will consist of scalding water and steam.
WORKED EXAMPLE The example below is for a G1⁄2 temperature & pressure relief valve with a discharge pipe (D2) having 4 no. elbows and length of 7m from the tundish to the point of discharge. From TABLE 2; Maximum resistance allowed for a straight length of 22mm copper discharge pipe (D2) from G1⁄2 temperature & pressure valve is 9m. Subtract the resistance for 4 no. 22mm elbows at 0.8m each = 3.2m. Therefore the maximum permitted length equates to: 5.8m. As 5.
3.13 ELECTRICAL CONNECTION The electrical installation must be in accordance with the current I.E.E. wiring regulations. PROTECH ELECTRONIC ANTI-CORROSION SYSTEM (ST Range & 500 litre models only) I MPORTANT : The ProTech anti-corrosion system MUST be permanently connected to a fused non-switched 240V electricity supply see FIG 3.12. Anode circuit L 1 N Electronic anode FIG. 3.
FITTING IMMERSION HEATER(S) (100 - 300 litre foor standing only) These are supplied with but not fitted to 100 - 300 floor-standing models. A sealing gasket is supplied with each element, however the use of a suitable sealing compound is recommended to ensure a correct seal. Care must be taken not to cross thread the immersion heater(s) when fitting. Each immersion heater is supplied with a regulation thermostat and manual reset thermal cut-out. This will activate if the regulation thermostat fails.
3.14 ELECTRICAL DIAGRAMS 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. 3.14 and FIG. 3.15. For High Capacity 500 litre models see FIG. 3.16 (page 20).
Live Supply from common fused spur FIG. 3.16 IMPORTANT: WHEN WIRING THE 500 LITRE CYLINDERS IMMERSION HEATER ENSURE THAT A SUITABLE HEAT RESISTANT CABLE RATED ABOVE THE PROTECTIVE DEVICE IS USED (I.E. 6MM FOR 32AMP).
CLAS HE both zones timed from integral timer GENUS Range program time zones 1 & 2 on digital display NOTE: Enable Parameter 223 and change from 0 to 1 Wiring diagram for two 2 Port Valves with Ariston GENUS HE, CLAS HE and CLAS boilers with 2 zone clip in fitted. FIG. 3.17 NOTE: WITH REGARDS TO THE PRIMO ITSI CYLINDERS, FOR MORE DETAILED WIRING INSTRUCTIONS PLEASE CONTACT THE TECHNICAL DEPARTMENT ON 0870 241 8180.
Wiring diagram for two 2 Port Valves FIG. 3.18 NOTE: WITH REGARDS TO THE PRIMO ITSI CYLINDERS, FOR MORE DETAILED WIRING INSTRUCTIONS PLEASE CONTACT THE TECHNICAL DEPARTMENT ON 22 0870 241 8180.
Wiring diagram for a 3 Port Valve & 2 Port Valve FIG. 3.
4. COMMISSIONING The thermostat(s) on the immersion heater(s) should be adjusted to trip at 60-65°C. This is the ideal temperature to prolong element life in hard water areas. Scale on the sheath builds up more rapidly at temperatures above this causing the element to overheat and premature failure can occur. Higher temperatures without additional controls would result in scalding. In known hard water areas the use of a scale inhibitor is also recommended.
8) Check for leaks around the controls and immersion heaters and again after the unit has heated up; 9) Check that no water is passing to waste through the relief valves; 10) Test the operation of the temperature & pressure relief and expansion valves by lifting/turning the manually operated test lever/cap and observing that water flows through freely and safely to waste; 11) Check that the discharge pipe is plumbed so that it falls continuously and that no taps, valves or other shut off devices are install
5. MAINTENANCE To ensure efficient and safe operation, and to maintain the warranty, it is necessary to ensure the appliance is serviced annually by a competent person. Before servicing, preliminary electrical system checks must be carried out to ensure electrical safety (i.e. polarity, earth continuity, resistance to earth and short circuit). 5.1 PROTECH ANTI-CORROSION SYSTEM WARNING: SWITCH OFF THE POWER SUPPLY BEFORE WORKING ON THE APPLIANCE. Trouble-shooting: 1) The green L.E.D.
closes after testing); 4) Expansion relief valve - check manually by turning the test knob (ensure valve closes after testing); 5) Discharge pipes (D1) - from both temperature & pressure relief and expansion relief valve for obstructions; 6) Tundish & discharge pipe (D2) - open either valve gradually to produce a full bore discharge into tundish and D2 without any back pressure; 7) Pressure reducing valve - check that the correct outlet pressure is being maintained by recording the pressure at an in-line te
Unvented Controls(s) Check controls as per the following: 1) Line strainer - with the water supply turned off remove screen from strainer and clean of any detritus; 2) Expansion vessel - with the water supply turned off and taps open, check expansion vessel pressure and top up as necessary; 3) Temperature & pressure relief valve - with the water supply turned on, check manually by lifting the test lever/turning the test knob (ensure valve closes after testing); 4) Expansion relief valve - check manually by
6. FAULT FINDING FAULT POSSIBLE CAUSES REMEDY 1) Mains cold water supply shut off Check and open Isolating and/or stop valve.
Model Make of Pressure Reducing Valve (2) 12 3.5 3.5 6 7/90 3.5 240 3+3 350 (1) (3) 350 2.85 85 12 3.5 3.5 6 7/90 3.5 240 3 350 (1) (3) 150 3.5 20.5 0.75 18 2.00 41 12 3.5 3.5 6 7/90 3.5 240 3 350 (1) (3) 175 3.5 26.7 0.90 22 2.20 51 12 3.5 3.5 6 7/90 3.5 240 3 350 (1) (3) 240 3.5 26.7 0.90 26 2.
Primo ITD 300 12 3.5 3.5 6 7/90 3.5 240 3+3 350 (1) (3) TBC 3.5 2.85 85 Primo ITD 250 bar 12 12 Maximum Water Supply Pressure* 12 12 12 12 bar Operating Pressure 3.5 3.5 3.5 3.5 3.5 3.5 Expansion Vessel Charge Pressure bar 3.5 3.5 3.5 3.5 3.5 3.5 6 6 Expansion Relief Valve Setting bar 6 6 6 6 Pressure & Temperature Relief Valve Setting bar/°C 7/90 7/90 7/90 7/90 7/90 7/90 Pressure Reducing Valve Set Pressure bar 3.5 3.5 3.5 3.5 3.5 3.
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Ariston Thermo Group, Luce - France Commercial subsidiary: Ariston Thermo UK Ltd Ariston Building Hughenden Avenue High Wycombe Bucks. HP13 5FT Telephone: (01494) 755600 Fax: (01494) 459775 Internet: www.ariston.co.uk E-mail: info@aristonthermo.
