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Installation and
technical manual
THESE INSTRUCTIONS SHOULD BE READ CAREFULLY AND
RETAINED FOR FUTURE REFERENCE.
Unvented cylinders are a controlled service as defined in the latest edition of
the building regulations and should only be fitted by a competent person. The
relevant regulations are:
After installation the Benchmark log book must be completed and left, with
these instructions, with the householder for future reference.
Unit 40, Block 5, Third Road, Blantyre Industrial Estate, Blantyre, Glasgow, G72 0UP
Tel. 01698 820533
Fax. 01698 825697
EHC Neptune Series
Unvented Hot Water Cylinders
England and Wales – Building Regulation G3
Scotland – Technical Standard P3
N Ireland – Building Regulation P5
The Electric Heating Company Ltd
CONTENTS
info@electric-heatingcompany.co.uk
www.electric-heatingcompany.co.uk
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Table of Contents
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Summary of Contents for EHC NDIR120L
- Page 1 EHC Neptune Series Unvented Hot Water Cylinders Installation and technical manual THESE INSTRUCTIONS SHOULD BE READ CAREFULLY AND RETAINED FOR FUTURE REFERENCE. Unvented cylinders are a controlled service as defined in the latest edition of the building regulations and should only be fitted by a competent person. The relevant regulations are: England and Wales –...
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Page 2: Table Of Contents
WRAS approved to show compliance with Building Regulations G3+L. STORAGE PRIOR TO INSTALLATION Neptune should be stored in its original packaging in an upright position in an area free from excessive damp. EHC Neptune Unvented Cylinders – Installation and technical manual Page 2... -
Page 3: Unpacking The Unit
Expansion vessel 15/22mm Tundish Expansion vessel hose Wall mount kit for expansion Temperature and pressure Dual thermostat vessel relief valve High flow rate inlet control Immersion Heater Two port valve EHC Neptune Unvented Cylinders – Installation and technical manual Page 3... -
Page 4: Choosing A Site
375mm long and care should be taken that they can be withdrawn for servicing if required. The discharge pipework from the safety valves should fall continuously and terminate safely. EHC Neptune Unvented Cylinders – Installation and technical manual Page 4... -
Page 5: Schematic Diagram
On 120 – 150 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. EHC Neptune Unvented Cylinders – Installation and technical manual Page 5... -
Page 6: General Installation
Do not use monobloc mixer tap or showers if the balanced cold connection is not provided. Outlets of this type can back-pressurize the unit and result in discharge. EHC Neptune Unvented Cylinders – Installation and technical manual Page 6... -
Page 7: Immersion Heaters
Fit the immersion thermostat (indirect only) into the thermostat pocket. Complete the wiring – use the appropriate wiring diagrams on page 10. EHC Neptune Unvented Cylinders – Installation and technical manual Page 7... -
Page 8: Discharge Arrangement
B) Have a vertical section of pipe at least 300mm long, below the tundish before any elbows or bends in the pipework. EHC Neptune Unvented Cylinders – Installation and technical manual Page 8... -
Page 9: Worked Example
(no bends or elbows) maximum length for each bend or pipework elbow in the discharge pipe 22mm Up to 9m 0.8m 28mm Up to 18m 35mm Up to 27m 1.4m EHC Neptune Unvented Cylinders – Installation and technical manual Page 9... -
Page 10: Electrical Connections And Wiring
Electrical connections and wiring If the Neptune cylinder is used with the EHC Fusion Boiler. An S-Plan configuration with Volt-connections on the Acuators gray and orange wire must be used. If in doubt refer to the Fusion wiring diagram or conatct the EHC Technical team. -
Page 11: Commissioning
Check that your discharge pipework is free from debris and is carrying the water away to waste efficiently. Release the valves and check that they reseat properly. EHC Neptune Unvented Cylinders – Installation and technical manual Page 11... -
Page 12: Servicing
TS212 12 litre Expansion Vessel (120 & 150 ltr sizes) TS219 19 Litre Expansion vessel (210 ltr size) TS216 Wall mounting bracket TS214 Expansion vessel hose ( ¾” M x ¾” F ) EHC Neptune Unvented Cylinders – Installation and technical manual Page 12... -
Page 13: Fault Finding
– typically worse in the morning Hot or warm water from cold If tap runs cold after a minute or so the pipe is Insulate / re-route picking up hear from the heating pipework EHC Neptune Unvented Cylinders – Installation and technical manual Page 13... -
Page 14: Technical Data
None fitted / none required CE Compliant and fitted with a BEAB Approved Immersion Heater Expansion Vessel 12 Litre size with 120 and 150 Litre models 18 Litre size with 210 Litre model EHC Neptune Unvented Cylinders – Installation and technical manual Page 14... -
Page 15: Technical Specifications
The Direct times are based upon 1 x 3 Kw element in the lower position *Time in minutes to raise 70% of the contents of the cylinder back to 65C ** Time in minutes to raise whole contents from 15C to 65C EHC Neptune Unvented Cylinders – Installation and technical manual Page 15... -
Page 16: User Instructions
The discharge may also stop. CALL A COMPETENT PLUMBER OUT TO SERVICE THE UNIT. Tell them you have a fault on an unvented cylinder. We stock all the spare parts they may need. EHC Neptune Unvented Cylinders – Installation and technical manual Page 16... -
Page 17: Benchmark Service Record
Service Record EHC Neptune Unvented Cylinders – Installation and technical manual Page 17... -
Page 18: Guarantee
01698 820 533. The Electric Heating Company Ltd, Unit 40, Block 5, Third Road, Blantyre Industrial Estate, Blantyre, Glasgow, G72 0UP Tel. 01698 820533 info@electric-heatingcompany.co.uk Fax. 01698 825697 www.electric-heatingcompany.co.uk EHC Neptune Unvented Cylinders – Installation and technical manual Page 18...