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EHC NDIR120L, Инструкция по установке и обслуживанию

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FAULT FINDING

SPARE PARTS

A full range of spare parts is available from Electric Heating 
Company. Tel: 01698 820533 see page 2 for part numbers.

USER INSTRUCTIONS

Your system is automatic in normal use and requires only 
annual servicing. You should employ a competent installer 
to perform the annual servicing. Normally this is timed to 
coincide with the annual boiler service.
IF WATER IS FLOWING FROM THE SAFETY VALVES 
THROUGH THE TUNDISH THIS INDICATES A FAULT 
CONDITION AND ACTION IS NEEDED.
If this water is hot, turn the boiler and / or the immersion 
heater off. Do not turn off the water until the discharge runs 
cool. The discharge may also stop.

CALL OUT A COMPETENT PLUMBER TO SERVICE THE 

UNIT.

Tell them you have a fault on an unvented cylinder. We stock 
all the spare parts they may need (see page 2).

DRAINING
IMPORTANT: After draining the cylinder do not close the 
hot tap until the cylinder has fully cooled; failure to follow 
this instruction may result in damage to the cylinder and 
will invalidate the guarantee.

FAULT

POSSIBLE CAUSE

SOLUTION

Water escaping from the case

Compression itting on hot - draw off not sealing

Check/remake joint with sealing paste

Cold water at hot taps

Direct - immersion heater not switched on or cutout has 
triggered

Check / reset

Indirect - boiler not working

Check boiler - consult boiler manufacturers' instructions

Indirect - motorised valve fault

Check plumbing / wiring to motorised valve

Indirect - cutout in dual stat has operated

Reset and investigate cause

Water discharges from expansion 
relief valve

If continual - pressure reducing valve ( part of inlet control set) 
may not be operating correctly

Check outlet pressure from inlet control set is 3 bar.

If continual - expansion relief valve seat may be damaged

Remove cartridge - check seat and renew if necessary

If intermittent - expansion vessel charge may have reduced / 
bladder perished

Check pressure in expansion vessel. Recharge to 3 bar if 
necessary. If bladder perished replace vessel.

Unit is being back pressurised

With cylinder cold check pressure in cylinder. If this is the same 
as the incoming mains pressure then you are getting backfeed. 
Install a balanced cold supply (see page 5)

Water discharges from temperature 
& pressure relief valve

Unit has overheated - thermal controls have failed

Switch off power to boiler and immersion heaters. 
Leave water supply on. Wait until discharge stops. 
Isolate water supply and replace if faulty

Milky / cloudy water

Oxygenated water

Water from any pressurised system will release oxygen bubbles 
when lowing. The bubbles will settle out.

No hot water low

Cold main off

Check and open stopcock

Strainer blocked in pressure reducing valve

Isolate water supply and clean

Inlet control set may be itted incorrectly

Check and reit as required

Noise during hot water draw-off 
-typically worse in the morning

Loose airing cupboard pipework

Install extra clips

Hot or warm water from cold tap

If tap runs cold after a minute or so the pipe is picking up heat 
from heating pipework.

Insulate / re-route

15

EHC NEPTUNE 
UNVENTED HOT WATER CYLINDERS

Содержание NDIR120L

Страница 1: ...ons MARCH 2017 The Electric Heating Company Ltd Unit 40 Block 5 Third Road Blantyre Industrial Estate Blantyre Glasgow G72 0UP Tel 01698 820533 Fax 01698 825697 email info electric heatingcompany co uk www electric heatingcompany co uk ...

Страница 2: ...selected to combine high low rate performance with minimum pressure drop to make the EHC Neptune perform well in all areas even those with poor water pressure IMPORTANT NOTE TO THE INSTALLER Read these instructions before commencing installation Unvented cylinders are a controlled service as deined in the latest edition of the building regulations and should only be itted by a competent person The...

Страница 3: ...g the water pressure note that a high static no low mains pressure is no guarantee of good low availability In a domestic installation 1 5 bar and 25 l min should be regarded as the minimum The maximum mains pressure that the inlet control set can accept is 12 bar Consideration should be given to upgrading existing 15mm cold mains pipework to a larger size if the recommended minimum pressure low r...

Страница 4: ...tat Single High Limit Stat Sensor Pocket Retaining Bungs Installation Maintenance Instructions Slimline Direct Models Electric Slimline Indirect Models Direct Models Electric Indirect Models Solar Indirect Models Direct Models Electric Indirect Models Single Coil Solar Indirect Models Two Coils 03 EHC NEPTUNE UNVENTED HOT WATER CYLINDERS ...

Страница 5: ... 180 litre sizes there is no dedicated secondary return boss and the secondary return circuit should be tee d into the cold feed pipe just above the drain elbow SCHEMATIC DIAGRAM Access for maintenance of the valves should be considered Consideration should be given to position of discharge pipes tundish drain valves shall be positioned away from electrical components The immersion heaters are 375...

Страница 6: ...uitable ittings capable of supporting full vessel weight and with appropriate consideration to wall material Connect the expansion vessel to the cold feed pipework between the inlet control set and the cold inlet on the cylinder Ensure that the top of the vessel is accessible for servicing CONNECTING TO THE CYLINDER All of the pipework connections on the cylinder are 22mm compression and supplied ...

Страница 7: ...only into the primary low pipework The direction of low arrow should be towards the primary low connection SECONDARY CIRCULATION The EHC Neptune can be used with secondary circulation An appropriate WRAS approved bronze circulator should be used in conjunction with a non return valve to prevent backlow On large secondary circulation systems it may be necessary to incorporate an extra expansion ves...

Страница 8: ...dish The tundish should be located such that any discharge is visible In addition where discharges from safety devices may not be apparent e g people with impaired vision or mobility consideration should be given to the installation of a suitable safety device to warn when discharge takes place e g electronically operated Diagram of a typical discharge pipe arrangement extract from Building Regula...

Страница 9: ...as car parks hard standings grassed areas etc are acceptable providing that where children play or otherwise come into contact with discharges a wire cage or similar guard is positioned to prevent contact whilst maintaining visibility c Discharges at a high level e g in to metal hopper and metal down pipe with the end of the discharge pipe clearly visible or onto a roof capable of withstanding hig...

Страница 10: ...78 175 210 810 N F 1234 D L 1778 NDIRSL180L 1674 478 175 210 910 N F 1484 D L 2791 NDIRSL210L 1987 478 175 210 1100 1500 1797 D L 2837 F D A B C G 22mm HOT DRAW OFF 22mm SECONDARY RETURN not always fitted See table F PTRV BOSS 1 2 22mm COLD FEED WITH DRY STAT POCKET DIP PIPE TO DEFLECTOR IN BOTTOM OF CYLINDER 120 00 CODE HEIGHT DIAMETER A B C D F G ERP BAND STANDING LOSS W NINDSL90L 1048 478 340 38...

Страница 11: ...L 2032 550 1500 1100 D XL 4543 22mm COLD FEED WITH DIP PIPE TO DEFLECTOR IN BOTTOM OF CYLINDER 22mm SECONDARY RETURN not always fitted See table 22mm HOT DRAW OFF F PTRV BOSS 1 2 DRY STAT POCKET SECOND IMMERSION HEATER not always fitted See table F E D C B A CODE HEIGHT DIAMETER A B C D E F ERP BAND STANDING LOSS NIND120L 906 550 290 330 390 345 N F N F B 44 NIND150L 1093 550 330 370 465 385 N F N F...

Страница 12: ...s fitted See table F PTRV BOSS 22mm HOT DRAW OFF E F D C B A G H 25 0 0 15 0 0 40 0 0 45 0 0 35 0 0 50 0 0 CODE HEIGHT DIAMETER A B C D E F G H ERP BAND STANDING LOSS W NSIND180L 1281 550 290 345 674 729 N F 1080 390 725 B 55 NSIND210L 1469 550 365 420 779 834 1150 1268 465 830 C 66 NSIND250L 1719 550 365 420 950 1005 1400 1518 465 1000 C 77 NSIND300L 2032 550 365 420 979 1034 1600 1832 465 1030 C ...

Страница 13: ...o connect the solar pump via the over temperature high limit cut out provided to ensure the heat input to the solar coil is interrupted if the cylinder overheats Some method to prevent thermosyphoning must also be employed Non return check valves in the primary low and return pipework would be acceptable If solar controls do not offer appropriate isolation a 2 port zone valve not supplied can be u...

Страница 14: ...SCHEMATIC WIRING 13 EHC NEPTUNE UNVENTED HOT WATER CYLINDERS ...

Страница 15: ...ch water as possible to low through the tundish Check that your discharge pipework is free from debris and is carrying the water away to waste eficiently Release the valves and check that they reseat properly On Completion of commissioning ill in the Commissioning Record and leave with the house owner GENERAL Servicing should only be carried out by competent installers and any spare parts used mus...

Страница 16: ...t cutout in dual stat has operated Reset and investigate cause Water discharges from expansion relief valve If continual pressure reducing valve part of inlet control set may not be operating correctly Check outlet pressure from inlet control set is 3 bar If continual expansion relief valve seat may be damaged Remove cartridge check seat and renew if necessary If intermittent expansion vessel char...

Страница 17: ...4 26 23 4 N A N A 1 64 EHC NEPTUNE DIRECT NDIR120L 30 150 120 110m N A N A N A N A N A 1 05 NDIR150L 35 185 150 135m N A N A N A N A N A 1 23 NDIR180L 40 220 180 160m N A N A N A N A N A 1 32 NDIR210L 45 255 210 185m N A N A N A N A N A 1 58 NDIR250L 50 300 250 225m N A N A N A N A N A 1 84 NDIR300L 55 355 300 270m N A N A N A N A N A 2 10 EHC NEPTUNE INDIRECT NIND120L 35 155 120 23m 47s 18m 00s 0...

Страница 18: ...int 85o C Maximum Inlet Water Pressure 12 Bar Operating Pressure 3 0 Bar Expansion Valve Opening Pressure 6 0 Bar Expansion Vessel Charge Pressure 3 0 Bar Maximum Operating Pressure 7 0 Bar Opening Pressure of T P Valve 7 0 Bar Opening Temperature of T P Valve 90o C Maximum Pressure on Primary Circuit Indirect Solar Coil 3 5 Bar PRESSURE SPECIFICATIONS IMMERSION ELEMENT SPECIFICATIONS 17 EHC NEPTU...

Страница 19: ...ressure at the cylinder What is the pre charge in the potable vessel Where is the Pressure Reducing Valve itted What is the PRV setting Has the Expansion Relief Valve been tested Has the T P valve been tested Does the discharge pipework meet building regulations Does the discharge pipework carry discharge away in a safe manor Have all safety features been checked DOES THE INSTALLATION COMPLY WITH ...

Страница 20: ...e of hot water Immersion heater connected YES NO N A Actions Signature SERVICE 3 Date Engineer s Name Company Name Telephone Number Pressure in Potable Expansion Vessel Safety valves functioning YES NO Actions Discharge pipe clear YES NO Actions Temperature of hot water Immersion heater connected YES NO N A Actions Signature SERVICE 4 Date Engineer s Name Company Name Telephone Number Pressure in ...

Страница 21: ...of hot water Immersion heater connected YES NO N A Actions Signature SERVICE 5 Date Engineer s Name Company Name Telephone Number Pressure in Potable Expansion Vessel Safety valves functioning YES NO Actions Discharge pipe clear YES NO Actions Temperature of hot water Immersion heater connected YES NO N A Actions Signature SERVICE 6 Date Engineer s Name Company Name Telephone Number Pressure in Po...

Страница 22: ...of hot water Immersion heater connected YES NO N A Actions Signature SERVICE 9 Date Engineer s Name Company Name Telephone Number Pressure in Potable Expansion Vessel Safety valves functioning YES NO Actions Discharge pipe clear YES NO Actions Temperature of hot water Immersion heater connected YES NO N A Actions Signature SERVICE 10 Date Engineer s Name Company Name Telephone Number Pressure in P...

Страница 23: ...of hot water Immersion heater connected YES NO N A Actions Signature SERVICE 13 Date Engineer s Name Company Name Telephone Number Pressure in Potable Expansion Vessel Safety valves functioning YES NO Actions Discharge pipe clear YES NO Actions Temperature of hot water Immersion heater connected YES NO N A Actions Signature SERVICE 14 Date Engineer s Name Company Name Telephone Number Pressure in ...

Страница 24: ...f hot water Immersion heater connected YES NO N A Actions Signature SERVICE 17 Date Engineer s Name Company Name Telephone Number Pressure in Potable Expansion Vessel Safety valves functioning YES NO Actions Discharge pipe clear YES NO Actions Temperature of hot water Immersion heater connected YES NO N A Actions Signature SERVICE 18 Date Engineer s Name Company Name Telephone Number Pressure in P...

Страница 25: ...f hot water Immersion heater connected YES NO N A Actions Signature SERVICE 21 Date Engineer s Name Company Name Telephone Number Pressure in Potable Expansion Vessel Safety valves functioning YES NO Actions Discharge pipe clear YES NO Actions Temperature of hot water Immersion heater connected YES NO N A Actions Signature SERVICE 22 Date Engineer s Name Company Name Telephone Number Pressure in P...

Страница 26: ...evidence of this maintenance to our reasonable satisfaction before approving any guarantee servicing repairs This may include evidence of completed Service Record and service agreement invoice Annual Services are available from the Customer Service Technical Support team A competent person is a business that has been adjudged by an accredited body to be suficiently competent to self certify that i...

Страница 27: ...for any consequential damage howsoever caused The effects of scale build up or the effects of corrosion Any consequential losses caused by the failure or malfunction of the product Faults and any associated costs arising from lack of power or water Failure incurred by water contamination air pollution and natural disasters This guarantee is not valid for installations outside the United Kingdom an...

Страница 28: ... home owner Please use this card to register within 30 days of commissioning occupation if new build to beneit from the Electric Heating Company 25 year guarantee By completing this form you consent to Electric Heating Company holding and using those details for all purposes directly related to the administration and conduct of guarantee services Apart from the necessary usage your personal data w...

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