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Jet 120i, Installation & Servicing Instructions Manual, Page: 1 / 24

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1

Pack Contents

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Unvented water heater incorporating immersion heater & thermal controls

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Factory fitted temperature/pressure relief valve (set at 90°C / 1 Mpa (10bar))

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Cold water combination valve assembly

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Tundish

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2 Port motorised valve 

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Compression nuts & olives

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Immersion heater spanner

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Installation & servicing instructions

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Guarantee card

IMPORTANT

Please read & understand all these instructions before commencing installation.

Please leave this manual with the customer for future reference.

Installation Manual

Unvented Indirect Water Heaters

Installation & Servicing Instructions

Summary of Contents for 120i

Page 1: ...alve assembly Tundish 2 Port motorised valve Compression nuts olives Immersion heater spanner Installation servicing instructions Guarantee card IMPORTANT Please read understand all these instructions...

Page 2: ...stallation which must be carried out by a competent plumbing and electrical installer in accordance with Building Regulation G3 The Building Standards Scotland Regulations 1990 or The Building Regulat...

Page 3: ...ns with reduced physical sensory or mental capabilities or lack of experience and knowledge if they have been given supervisory or instruction concerning use of the appliance in a safe way and underst...

Page 4: ...ll be supplying both the hot and cold water requirements simultaneously It is recommended that the maximum water demand is assessed and the water supply checked to ensure this demand can be satisfacto...

Page 5: ...old water port available Drain Tap A suitable drain tap should be installed in the cold water supply to the cylinder between the expansion valve see Fig 05 page 11 and the heater at a lower level as p...

Page 6: ...mensions Model Reference Dimensions mm A B 120 Ind 931 616 150 Ind 1114 800 170 Ind 1241 927 210 Ind 1499 1184 250 Ind 1752 1379 300 Ind 2065 1694 315 A 354 B Hot Outlet T P Valve Cold Inlet Primary R...

Page 7: ...30 2 34 8 37 7 46 7 57 9 45 min 25 0 28 8 32 3 34 2 41 7 51 0 Coil rating kW 15l min 13 1 16 2 13 7 14 3 14 8 13 0 30l min 16 3 16 3 17 1 17 3 17 4 15 9 45l min 17 6 17 7 18 8 19 1 19 0 17 5 Pressure...

Page 8: ...undish 3 54 The tundish should be vertical located in the same space as the unvented hot water storage system and be fitted as close as possible to and lower than the valve with no more than 600mm of...

Page 9: ...to prevent contact whilst maintaining visibility and c discharges at high level e g into a metal hopper and metal downpipe with the end of the discharge pipe clearly visible or onto a roof capable of...

Page 10: ...outlet sizes NOTE The table below is based on copper tube Plastic pipes may be of different bore and resistance Sizes and maximum lengths of plastic should be calculated using data prepared for the ty...

Page 11: ...ry Circulation Connection To hot outlets Primary flow Primary return T P relief valve Balanced cold water connection if required Cold water combination valve Mains water supply Isolating valve not sup...

Page 12: ...raw off points Discharge pipework from valve outlets to tundish Connection to the primary circuit All connections are 22mm compression However 3 4 BSP parallel threaded fittings can be fitted to the p...

Page 13: ...8 9 10 1 2 3 4 5 6 7 8 9 10 Supply 1 2 3 G 1 Br Bl 2 0 GY 3 G 1 Br Bl 2 0 1 3 2 2 L N Programmer Boiler Pump Zone valve HTG Cylinder terminal block Room stat Zone valve DHW supplied Junction box 3 2 3...

Page 14: ...n the lever to the AUTOMATIC position Switch on the boiler ensure the programmer is set to Domestic Hot Water and allow the cylinder to heat up to a normal working temperature 60o C recommended If nec...

Page 15: ...f necessary the temperature can be adjusted by inserting a flat bladed screwdriver in the adjustment knob on front of the immersion heater thermostat and rotating The adjustment represents a temperatu...

Page 16: ...es with the 2 port motorised zone valve supplied to interrupt the flow of primary water around the heat exchanger coil when the control temperature has been reached The controls are located within the...

Page 17: ...3 Check and refit as required Water from hot taps is cold 1 Back up immersion heater not switched on 1 Check and switch on 2 Back up immersion heater thermal cut out has tripped 2 Check Reset by pushi...

Page 18: ...dish not shown 95 605 838 6 Cold water combination valve complete 70 365 20 7 Nut olive pack 4 of each 95 607 838 8 Terminal cover 95 614 305 9 Blanking plate assembly 95 605 881 10 Direct combined th...

Page 19: ...off your waste equipment for recycling please contact your local city office your household waste disposal service or the company where this product was purchased Insulation is by means of an approved...

Page 20: ...set temperature C I min Yes Type of control system if applicable Y Plan S Plan Other Is the cylinder solar or other renewable compatible Yes No What is the hot water temperature at the nearest outlet...

Page 21: ...Telephone No Comments Signature SERVICE 07 Date Engineer name Company name Telephone No Comments Signature SERVICE 09 Date Engineer name Company name Telephone No Comments Signature SERVICE 02 Date E...

Page 22: ...22 Notes...

Page 23: ...23 Notes...

Page 24: ...d that It has been correctly installed as per the instructions contained in the instruction manual and all relevant Codes of Practice and Regulations in force at the time of installation The Benchmark...

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