SUTP Mid Range
Unvented Hot Water Heaters
Installation Manual
30,50 & 75 Litres
Page 1: ...SUTP Mid Range Unvented Hot Water Heaters Installation Manual 30 50 75 Litres ...
Page 2: ...tallation Commissioning and Service Record 14 1 Introduction The SUTP Mid Range is a high quality unvented stainless steel domestic hot water cylinder suitable for domestic hot water systems where the cold mains water supply is between 3bar and 12bar Reduced performance is available at lower pressures but the units are not suitable for pressures lower than 1 5bar and flow rate of 20 litres per min...
Page 3: ...nual reset thermal cut out Installation Manual Performance Heat up time 15 to 65 ºC min 36 55 85 Reheat time for 70 of contents min 25 38 60 2 Component Check List The SUTP water heater comes complete with all necessary safety equipment please check through the components supplied and ensure that all parts are present a Water Heater b 5 litre Expansion Vessel c Pressure reducing valve d Expansion ...
Page 4: ...ate power supply for connecting the immersion heater The wall onto which the cylinder is mounted should be of good sound masonry construction capable of holding the weight of the cylinder when full of water See Technical specifications for weights min 300mm min 100mm Unit should be mounted on or near external wall The position of the cylinder should be such that easy access is provided for servici...
Page 5: ...any water exiting either valve can be seen draining through the tundish see fig 2 4 4 Pressure Reducing Valve The pressure relief valve should be installed in the cold water supply to the water heating unit with the arrow pointing in the direction of water flow as shown in figure 5 This can be connected to a supply pressure of between 1 5 and 12 bar 4 5 Expansion Relief Valve this must be installe...
Page 6: ...the discharge pipe from the Tundish should terminate in a safe place where there is no risk to persons in the vicinity of the discharge be of metal and a Be at least one pipe size larger than the normal outlet size of the safety device unless its total equipment hydraulic resistance exceeds that of a straight pipe 9 m long i e discharge pipes between 9 m and 18 m equivalent resistance length shoul...
Page 7: ...arly visible Tundish visible or not or onto a roof capable of withstanding high temperature discharges of water and 3 m from any plastic guttering system that would collect such discharges Tundish visible Where a single pipe serves a number of discharges such as in blocks of flats the number served should be limited to not more than six systems so that any installation discharging can be traced re...
Page 8: ...rked example The example below is for a diameter temperature relief valve with a discharge pipe D2 having 4 22mm elbows and a length of 7 m from the tundish to the point of discharge From Maximum resistance allowed for a straight length of 22mm copper discharge pipe D2 from a diameter temperature relief valve is 9 0 m Subtract the resistance for 4 No 22mm elbows at 0 8 m each 3 2 m Therefore the m...
Page 9: ...fitted to the cylinder at the factory It should be wired in accordance with the instructions given in Fig 4 The cable should be routed through the strain relief bush 7 2 Wiring instructions a The power supply to the heater must be via a double pole isolator switch or controller having contact separation of at least 3 mm using 1 5mm sq flexible cable 85 C rubber insulated HOFR sheathed to comply wi...
Page 10: ...rom behind the valve seating and to prove the correct function of the discharge arrangement 8 7 Check all joints for leaks and rectify as necessary 8 8 With the heater full of water turn the thermostat to a point just below its mid point setting and switch on the electricity supply Check that the cylinder heats the water and the thermostat operates when the set temperature is reached Turn on the h...
Page 11: ...sure in the expansion vessel and top up as necessary The charge pressure should be 3 0 bar 9 8 Close the drain cock disconnect the hose refit the immersion heater and close all hot water taps before reopening the stopcock Allow the cylinder time to fill whilst checking for any leaks Release any air from the system by opening each hot water tap individually starting with the one furthest from the c...
Page 12: ...eck and re set Intermittent water discharge through tundish on warm up 1 Expansion vessel has lost its charge pressure 1 Turn off stopcock open a hot water tap check vessel charge pressure and recharge to 3 bar Continuous water discharge 1 Pressure reducing valve PRV not working 2 Expansion relief valve not seating correctly 3 Temperature and pressure relief valve not seating correctly 1 Check pre...
Page 13: ...so guarantees the stainless steel hot water cylinder for a period of 10 years from the date of purchase against faulty material or manufacture provided that a It has been installed by a competent person in accordance with this installation manual and all current regulations and codes of practice at the time of installation b It has been used solely for the purpose of heating potable water that com...
Page 14: ...r hot water system is serviced regularly and that your service engineer completes the appropriate Service Interval Record below SERVICE 1 DATE SERVICE 2 DATE SERVICE ENGINEER SERVICE ENGINEER TEL NO TEL NO REGISTRATION NO REGISTRATION NO SIGNATURE SIGNATURE SERVICE 3 DATE SERVICE 4 DATE SERVICE ENGINEER SERVICE ENGINEER TEL NO TEL NO REGISTRATION NO REGISTRATION NO SIGNATURE SIGNATURE SERVICE 5 DA...
