EHC Comet Combi 14.4kW Manual de usuario
Comet Combination Unit
Unit 40 block 5 Third Road
Blantyre Glasgow
G72 0UP
Tel: 01369 820533 Fax: 01698 825697
email: [email protected]
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Contents Page
1. Introduction 4
2. Contents 4
3. Safety 5
4. Installation; Dimentions 6
5. Installation; General 7
6. Hydraulic Schematic 10
7. Installation: Plumbing 11
8. Installation; Discharge Arrangement 13
9. Electrical Connections 15
10. Connection Of External Appliances & Controls 16
11. Electrical Schematic 17
12. Commissioning 18
13. Control Panel 20
14. Operation 21
15. Servicing 22
16. Guarantee 23
17. Troubleshooting 24
18. Technical Data 25
19. Benchmark Service Record 26
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Thank you for specifying the Comet Combination Unit (hereafter reffered to as the Comet Combi) from The
Electric Heating Company.
The Comet Combi is an electrically heated direct acting self modulating boiler that is designed for domestic
heating purposes, The Comet Combi consists of an electric heating boiler and an indirect unvented hot water
cylinder with the necessary safety devices. The Comet Combi is supplied with a twin channel programmer &
room thermostat that can be installed remotely from the boiler. When the unit is setup under its own scheduled
program times it can control both heating & hot water circuits independently. The cylinder coil is powered the by
boilers internal heat exchanger responsible for the purposes of space and water heating.
This appliance is not intended for use by persons (including children with
reduced physical, sensory or mental capabilities, or lack of experience and knowledge) unless
they have been given supervision or instruction concerning use of
the appliance by the person responsible for their safety.
Children should be supervised to ensure they do not play with the appliance.
• The Electric Heating Company reserve the right to make minor changes to the specication or design when necessary.
• All boilers come with a 24 month warranty that covers all defects originating from faulty materials and workmanship in the
manufacture of the boilers.
• The warranty covers the replacement of any faulty parts and labour costs.
• The warranty will not cover any damage to the boiler from poor or incorrect installation work.
• The warranty will not cover any call out charges that have not been authorised by the Electric Heating Company Ltd.
• The warranty will not cover water leaks into the boiler. All plumbing joints must be checked.
• The warranty card must be completed and sent back to The Electric Heating Company as soon as possible for registration.
• An internal Magnetic Filter is tted to the Boiler and it must be cleaned at least annually.
• Failure to clean the Magnetic Filter may result in boiler shut-down, this will not be covered under warranty.
• Take care when handling the boiler not to cause any damage to the unit.
• The boiler must be stored in a dry place.
• Care must be taken when installing the boiler to make sure the oor area will take the boilers full weight when full.
• Minimum clearances must be adhered to.
1. Introduction
2. Contents
Optional Extras
• Comet Combi Boiler
• Monoblock Control Set Valve
• Room Thermostat
• Twin Zone Programmer
• Tundish
• Installation Manual
• Filling Loop
• EHC Shower Flow Sensor
• Backup Immersion Heater
• Solar PV Immersion Heater
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3. Safety
Please read and understand these instructions before installing the Comet Combi. Following the
installation and commissioning instructions of the Comet Combi the system should be explained to
the customer and all instructions left with them for future reference.
• The Comet Combi must be installed in accordance with the manufacturer’s instructions and all relevant regula-
tions in force at the time of installation.
• The Comet Combi’s Domestic Hot Water Cylinder is of the UNVENTED type. Its installation is subject to Build-
ing Regulation G3 (England and Wales), Technical Standards for (Scotland) or Building Regulation (Northern
Ireland). The Installation must be carried out by a competent person qualied to do so.
• The Comet combi must be installed into a sealed (pressurised) primary system. Following installation or the
primary system the unit should be ushed in accordance with BS7593 and appropriate cleaner & inhibitor added
to the system.
• The Comet Combi’s hot water cylinder is indirectly heated by the primary heat exchanger located within the
unit.
• Please note a load check should be taken into consideration when installing high output electrical appliances.
• The use of an Off-Peak tariff that provides at least three off peak electricity periods, such as Economy 10 is
recommended. Where possible the central heating and hot water should be programmed to coincide with the
Off Peak periods available. For more information on tariffs please contact the Electric Heating Company.
This appliance must be tted in accordance with the following instructions.
The Local Building Regulations
The Building Regulations
The Building Standards, (Scotland-consolidated) Regulations. Local water bylaws. British Standards-
code of practice
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4. Installation: Dimensions
581
90168
1745
1773
~1330
150mm
Side
25mm
Side
120 60145
628
470
62
400mm Min
Front
25mm
Rear
250mm Min
Top
Note:
Please take care to leave
enough space at the front
of the boiler for routine
maintenance!
• Remove the boiler packaging checking the contents are correct.
• Take care when lifting the boiler not to cause damage to the outer casing.
• Due to the weight of the product the use of a handling device will be required.
• The boiler should be handled by two persons.
• Lift the boiler by the internal frame only, do not lift by pipes.
• Stooping should be avoided and protective clothing worn.
• Packaging is recyclable and should be disposed of approporately.
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5. Installation: General
1. General
The boiler must be installed by a professional plumber or heat-
ing engineer and must be connected to the public low voltage
network by a competent person. For systems that require a three
phase electrical supply we strongly recommend this is installed
by a 17th Edition certied Electrician.
The Electric Heating Company will not be held responsible for
faulty installations which are performed by unqualied trades-
people.
2. Pipe Connections
All Comet Combi Electric Boilers have 22mm Compression pipe
connections that are clearly marked. Please note that the boilers
are supplied with blank plugs for transit purposes that must be
removed before tting.
Mains Inlet, Hot Outlet, Flow & Return connections are clearly
marked on the external case, under no circumstances should
these connections be reversed.
If hot capillary joints are to be used, these joints must be made
before connections to the boiler are done.
3. Case Removal
Loosen the outer screw at the bottom of the boiler and pull the
front cover up & outwards taking care to remove internal earth
connections. Earth connections must be re-connected before the
boiler case is re-installed.
4. Isolation Valves
We recommend that full bore isolation valves are tted on the
Flow,Return & Main Water Supply Pipework. Such valves must
be full bore and not “ball valves”. The installation of ball valves
in the ow and return pipework will reduce the recommended
ow rate through the boiler.
5. Auto air vents
An auto air vent is integral within the boiler.
6. Boiler sizing
Calculate the space heating requirements in accordance with
BS EN 12831 and BS EN 1433. An additional allowance of 3kW
(10,239 Btu’s) should be made to the ‘space heating’ calculation.
7. Insulation
Where practical, and if at all possible, we recommend that all
pipework be insulated, in particular the primary pipework within
a boiler cupboard. This is to reduce heat loss and reduce high
cupboard temperatures from exposed pipework.
8. System Design
The boiler has an integral automatic bypass valve which should be
set to allow the minimum ow rates to pass through the boiler (8
l/min) when all radiator thermostats and zone valves are closed.
Allowance should be made for a radiator to be installed within the
heating circuit and locked open. This will be located in the room
that has the room thermostat installed. To comply with building
regulations, Part L and Part J (in Scotland), room and cylinder
stats must be tted.
9. Water Connections
Provisions must be made for the replacement of water lost from
the heating system (sealed systems). Reference should be made
to BS EN 14336 for the method of lling and make up of water.
There must be no direct connection between the boilers central
heating system and the main water supply. When mains water
is required to ll the system directly, all local water bylaws must
be observed, and any connection made must be disconnected
after use.
10. Flushing
The system must be ushed to within 10% of mains water PPM
to ensure that no debris is trapped in the system as this may
result in boiler failure. Where existing radiators and pipe-work
are utilized a power ush must be carried out to remove debris.
For further guidance please see section - Flushing & System
Protection.
11. System pressures
All boilers are tested to 4.0 bar. The normal working pressure of
the boiler should be set to approx 1.0 / 1.5 bar. All sealed sys-
tems should comply with the relevant building regulation sand
standards, including BS EN 13831 – Specication for Expansion
Vessels.
Please note:
In order to protect the boiler, it is imperative that the pre-installed
magnetic lter is removed and cleaned at least annually. Failure
to carry out this action will increase contamination of the boiler
by system residue.
12. System types
The Comet Combi range of boilers can be used in various system
designs. Please refer to The Electric Heating Company for more
details on our Comet Combi Boiler for under oor heating.
We recommend the use of thermostatic radiator valves on all
radiators except in the room that has the wall thermostat tted.
This radiator should be tted with lock shield valves and left in
the fully open position.
Systems should be designed to meet the current building regula-
tions in force at the current time.
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5. Installation; General
1 2
The following steps will assist in removing the casing for installation & maintenance purposes.
Loosen Bottom Screw. Lift & Pull Cover Out At The Bottom To Remove.
3
4
Remove Left Screw.
Remove Right Screw.
5
Carefully Lift & Remove Top Section.
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5. Installation; General
1
6
9
2
3
10
5
8
4
7
1 - Expansionvessel
2 - Tundish
3 - MagneticFilter
4 - VortexFlowSensor
5 - PressureSensor
6 - PowerBoard
7 - Pump
8 - HeatExchangerincludingAAV
9 - Zonevalves
10- Drainvalve
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Mains water inlet
hot water outlet
Primary return
balanced mains outlet
Primary flow
1
13
12
11
10
9
8
6
2
3
7
4
5
14
14
Valve Not Included Valve Not Included
1 - CombinationValvewithPRV
2 - Expansionvessel
3 - T&PReliefvalve
4 - Automaticbypass
5 - Tundish
6 - MagneticFilter
7 - VortexFlowSensor
8 - PressureSensor
9 - PowerBoard
10- Pump
11 - HeatExchangerincludingAAV
12- Zonevalves
13- Isolatingvalves(Notincluded)
14- DrainValve
6. Hydraulic schematic
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2
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