Grant DuoWave Direct 170 Installation & User'S Instructions Download Page 26 | Manualshive

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Fault Finding Guide

26

8

Fault Finding Guide

8.5 Excessive Hot Water from Taps

Excessive Hot Water from Taps

Is Cylinder Thermostat

set too high?

Reduce Thermostat

Setting

Is System Wiring

correct?

Correct Wiring as

per instructions

Is Cylinder Thermostat

Operating?

Replace Cylinder

Thermostat

No

Yes

Yes

Yes

No

No

Test for correct operation. If water is still

cold, contact a competent Engineer

Does Motorised Valve

close when Thermostat

is satisfied?

Repair or Replace

Motorised Valve Motor

Repair or Replace

Motorised Valve

Fault. Contact

Engineer

Yes

No

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Summary of Contents for DuoWave Direct 170

Page 1: ...Grant DuoWave System Solar Cylinder Heat Pump Cylinder Ranges Installation User Instructions Part No DOC 75 Rev 06 January 2011 ...

Page 2: ...ry Return 13 4 8 Tundish 13 4 9 Discharge Pipe 13 4 10 Discharge Pipe Arrangement 14 4 11 Discharge Pipe Sizing 14 4 12 Worked Example 14 5 Electrical Installation 15 5 1 Immersion Heater 15 5 2 Immersion Heater Wiring Instructions 15 5 3 Dual Thermostat 15 5 4 2 Port Valve 15 5 5 W plan System 16 5 6 Y plan System 17 5 7 S plan System 18 5 8 S plan System for Grant Aerona HP 19 5 9 Solar Thermal ...

Page 3: ...direct cylinders are also supplied fitted with a single 3kW electric immersion heater DuoWave Solar direct cylinders have a single coil only for connection of solar thermal but are also supplied fitted with two 3kW electric immersion heaters Refer to page 15 for further details on immersion heaters In all cases each coil must be connected using a 2 port motorised valve to shut off the flow from th...

Page 4: ...re bar 6 6 6 6 6 6 Temp pressure relief valve lift pressure bar 7 7 7 7 7 7 Temp pressure relief valve lift temperature C 90 90 90 90 90 90 Maximum primary circuit working pressure bar 3 3 3 3 3 3 Performance Top coil rating kW 8 50 8 50 8 50 8 50 10 00 16 00 Top coil recovery rate mins 18 20 25 26 25 27 Bottom solar coil rating kW 8 5 10 0 16 0 13 9 16 0 24 0 27 0 24hr standing loss kW direct and...

Page 5: ...ion relief valve pressure bar 6 6 6 6 6 Temp pressure relief valve lift pressure bar 7 7 7 7 7 Temp pressure relief valve lift temperature C 90 90 90 90 90 Maximum primary circuit working pressure bar 3 3 3 3 3 Performance Top coil rating kW 32 0 47 0 47 0 55 6 55 6 Bottom solar coil rating kW 8 5 10 0 16 0 16 0 23 0 24hr standing loss kW 2 04 2 45 2 69 2 71 2 94 Check list Cylinder assembly 170 l...

Page 6: ...ocket 22mm Solar flow not on 500 model Immersion heater factory fitted 22mm Cold water inlet 22mm Solar flow 500 model only 22mm Solar return 22mm Boiler return 0 30 Dims Model mm 170 200 250 300 400 500 A 200 200 200 200 200 235 B 275 275 275 320 320 N A C 330 330 330 375 400 600 D 380 380 380 420 420 620 E 460 460 460 510 510 715 F 540 660 795 860 1100 820 G 655 790 935 1005 1240 1120 H 735 870 ...

Page 7: ... 1475 1980 I 1025 1170 1430 1695 2050 J 1075 1230 1480 1745 2110 Dia 580 580 580 580 580 Figure 2 2 DuoWave direct solar cylinder dimensions Dia A B C D E F G H I J DuoWave Direct Solar Cylinder Dimensions 40 30 22mm Hot water draw off 1 2 T P Relief valve factory fitted 22mm Secondary return Solar stat pocket 22mm Solar flow Immersion heater factory fitted Immersion heater factory fitted 22mm Col...

Page 8: ...430 1695 2045 J 1075 1230 1480 1745 2110 Dia 580 580 580 580 580 2 4 Dimensions DuoWave HP Indirect Cylinders Figure 2 3 DuoWave HP indirect cylinder dimensions Dia A B C D E F G H I J DuoWave HP Indirect Cylinder Dimensions 40 30 0 30 22mm Hot water draw off 1 2 T P Relief valve factory fitted 22mm Heat pump flow 22mm Heat pump return 22mm Secondary return Solar stat pocket 22mm Solar flow Immers...

Page 9: ...tted 13 4 BSPF Item Description Connection Size 12 Immersion heater c w control limit thermostat factory fitted 13 4 BSPF 13 Pressure reducing valve 3 bar 14 Balanced cold supply connection 22mm compression 15 Expansion relief valve 6 bar 15mm compression 16 Temperature Pressure relief 15mm compression valve 90 C 7 bar 17 Tundish 15 22mm compression 18 Discharge pipe not supplied with cylinder 19 ...

Page 10: ...ry Solar heat source flow tapping 22mm compression 11 Immersion heater c w control limit thermostat factory fitted 13 4 BSPF Item Description Connection Size 13 Pressure reducing valve 3 bar 14 Balanced cold supply connection 22mm compression 15 Expansion relief valve 6 bar 15mm compression 16 Temperature Pressure relief 15mm compression valve 90 C 7 bar 17 Tundish 15 22mm compression 18 Discharge...

Page 11: ...nections Solar Heating 1 The Solar flow and return connections should be made to the lower coil connections If the lower coil is not thermostatically controlled a 2 port or solenoid valve high temperature rated not supplied must be fitted in the flow and be controlled from the dual thermostat mounted at low level on the cylinder via the thermostat pocket 8 Contact Grant UK for details 2 If you are...

Page 12: ...re Relief Valve The temperature and pressure relief valve T P Valve is supplied factory fitted to the cylinder The T P valve must not be removed from the cylinder or tampered with in any way The valve is pre set to lift at 7bar or 90 C and any attempt to adjust it will invalidate the warranty 4 5 Hot Water Supply 1 Connect the hot water supply pipe to the top outlet 1 of the cylinder 4 6 Preventio...

Page 13: ...scharges a wire cage or similar guard is positioned to prevent contact whilst maintaining visibility c discharges at high level e g in to metal hopper and metal down pipe with the end of the discharge pipe clearly visible tundish visible or not or onto a roof capable of withstanding high temperature discharges of water and 3m from any plastics guttering systems that would collect such discharges t...

Page 14: ...nce for quantity of 4 Ø22mm elbows at 0 8m each 3 2m Therefore the maximum permitted length equates to 5 8m 5 8m is less than the actual length of 7m therefore calculate the next largest size Maximum resistance allowed for a straight length of Ø28mm pipe D2 from a 1 2 diameter temperature relief valve equates to 18m Subtract the resistance for a quantity of 4 Ø28mm elbows at 1 0 each 4m Therefore ...

Page 15: ...rol For the Indirect models two Dual Thermostats each a combined control and high limit thermostat are supplied separately with the unvented hot water safety kit One is fitted into the upper sensor pocket in the cylinder see Figures 2 4 to 2 6 for position to control the operation of the boiler or heat pump primary coil The second is fitted in the lower sensor pocket to control the operation of th...

Page 16: ...mostat L N E 2 1 C C 1 2 1 2 3 4 5 6 7 N E L N E L N HW HTG L 8 9 10 2 1 3 Radiator Pump 3 port diverter valve not supplied 3 port divert valve not supplied Blue Blue Brown Brown Green Yellow 2 port zone valve supplied 2 port zone valve supplied Note Orange and grey wires not required electrically isolate High limit Control Junction box Time controller Boiler Pump Grant DuoWave Indirect water cyli...

Page 17: ...der 3 port mid position valve not supplied 2 port zone valve supplied 230V 50Hz Room Thermostat L N E 2 1 C C 1 2 1 2 3 4 5 6 7 N E L N E L N HW On HW Off HTG L 8 9 10 2 1 3 Mid position zone valve White Blue Grey Blue Orange Brown Green Yellow 2 port zone valve supplied Green Yellow Note Orange and grey wires not required electrically isolate High limit Con trol Cylinder Dual Thermostat Top Coil ...

Page 18: ...Boiler Radiator Pump 2 port zone valve supplied Grant DuoWave Indirect water cylinder 2 port diverter valve not supplied Cylinder Dual Thermostat Top Coil 230V 50Hz Room Thermostat L N E 2 1 C C 1 2 1 2 3 4 5 6 7 N E L N E L N HTG HW L 8 9 10 2 1 3 Zone valve DHW Zone valve HTG Blue Brown Green Yellow Grey Orange Grey Orange Blue Brown Green Yellow High limit Con trol Junction box Time controller ...

Page 19: ...ith integral circulating pump Radiator 2 port zone valve supplied Grant DuoWave HP water cylinder 2 port diverter valve not supplied Cylinder Dual Thermostat Top Coil Grant Aerona Heat Pump Controls Connection 230V 50Hz Room Thermostat L N E 2 1 C C 1 2 1 2 3 4 5 6 7 N HTG HW L 8 9 10 2 1 3 Zone valve DHW Zone valve HTG Blue Brown Green Yellow Grey Orange Grey Orange Blue Brown Green Yellow High l...

Page 20: ... GSD1 Controller 2 port or solenoid valve Not supplied Solar Circulating Pump Solar Collector Solar Pump Station Dual Thermostat Cylinder Temperature Sensor Collector sensor Cylinder bottom sensor N 230V GND Sensor Solar pump N E L N E L Solenoid valve Dual thermostat Solar coil 230V 3A fused supply L N E 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 Grant GSD1 Mk2 Controller 1 C C 1 2 ...

Page 21: ...r will discharge from the tundish 1 The pressure reducing valve has malfunctioned This will cause a large volume of water to flow through the tundish 2 The Expansion relief valve is letting by This will cause a very low volume of water to flow through the tundish In both cases identify the defective component and replace All repairs must be carried out by a competent person 6 5 Hot Water Discharge...

Page 22: ...l 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 cylinder 10 Manually lift the expansion relief and temperature and pressure relief valve one at a time every 12 months more frequently in hard water areas to prevent debris from building up behind the valve seat Whilst carrying out this operation check ...

Page 23: ...r correct operation If water is still discharging contact a competent Engineer Thermostat Failure Test Vessel and Recharge or Replace Immersion Thermostat Failure Primary Cylinder Thermostat Faulty T P Valve Repair or Replace Immersion Thermostat Repair or Replace Thermostat Replace T P Valve No Yes Yes Yes Yes No No 8 Fault Finding Guide ...

Page 24: ...T P Valve Faulty Pressure Reducing Valve Replace T P Valve Replace Pressure Reducing Valve No Yes Yes Yes Yes Yes No No 8 3 No Flow from Hot Water Taps No Flow from Hot Water Taps Mains Supply Disconnected Test for correct operation If water is still not flowing contact a competent Engineer Open supply valve or wait for supply to be reconnected Mains Supply Disconnected Mains Supply Disconnected C...

Page 25: ...t Water setting Is Motorised Valve working Is Boiler working Is Cylinder Stat Calling for Heat Check Motorised Valve motor and Micro switch Yes No No No No Yes Yes Yes Yes Test for correct operation If water is still cold contact a competent Engineer Has Thermal Cut Out Operated Check and Reset Button Check and Replace Cylinder Thermostat No Yes ...

Page 26: ...ystem Wiring correct Correct Wiring as per instructions Is Cylinder Thermostat Operating Replace Cylinder Thermostat No Yes Yes Yes No No Test for correct operation If water is still cold contact a competent Engineer Does Motorised Valve close when Thermostat is satisfied Repair or Replace Motorised Valve Motor Repair or Replace Motorised Valve Fault Contact Engineer Yes No ...

Page 27: ...erm type ELE14 IN 800 UNV GCS30 Drain Cock GCS14 Immersion Heater Thermostat Cotherm type TSE GCS31 Motorised Valve GCS16 Expansion Vessel 19 litre nominal 170 200 250 models 18 litre actual vol 3 4 BSPM connection GCS24 Expansion Vessel 24 litre nominal 300 model 22 litre actual vol 3 4 BSPM connection GCS25 Expansion Vessel 35 litre nominal 400 model 35 litre actual vol 3 4 BSPM connection GCS28...

Page 28: ...ctrician 3 When a hot tap is turned on there may be a short surge of water this is quite normal with unvented systems and does not mean there is a fault 4 When you first fill a basin the water may sometimes appear milky This is due to very tiny air bubbles in the water which will clear very quickly If water is seen to flow from either the Temperature Pressure Relief T P Valve valve or the Expansio...

Page 29: ...chase date must be provided upon request Chargeable Repairs A charge will be made if the cause of the breakdown is due to any of the following Faults caused by the plumbing or heating system external electrics and external components The Grant Cylinder has not been commissioned or serviced in accordance with the installation and servicing manual The system has been installed for over two years Rem...

Page 30: ...s period you will have the opportunity to continue this cover on an annual basis To access full details and an application form for this extended cover first visit www grantuk com Follow the links to the Householder Zone register your Cylinder for a further one year product warranty giving two years from the date of purchase and then download the extended warranty details and application form Plea...

Page 31: ...Notes 31 Notes ...

Page 32: ...GRANT ENGINEERING UK LTD Hopton House Hopton Industrial Estate Devizes Wiltshire SN10 2EU Telephone 01380 736920 Fax 01380 736991 Email info grantuk com Website www grantuk com ...

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