Related Manuals for EHC Comet Combi 14.4kW
Summary of Contents for EHC Comet Combi 14.4kW
- Page 1 Comet Combination Unit InstallatIon & technIcal Manual Unit 40 block 5 Third Road Blantyre Glasgow G72 0UP Tel: 01369 820533 Fax: 01698 825697 email: info@electric-heatingcompany.co.uk...
-
Page 3: Table Of Contents
Contents Page Introduction Contents Safety Installation; Dimentions Installation; General Hydraulic Schematic Installation: Plumbing Installation; Discharge Arrangement Electrical Connections 10. Connection Of External Appliances & Controls 11. Electrical Schematic 12. Commissioning 13. Control Panel 14. Operation 15. Servicing 16. Guarantee 17. Troubleshooting 18. -
Page 4: Introduction
• Minimum clearances must be adhered to. Contents Optional Extras • Comet Combi Boiler • Monoblock Control Set Valve • EHC Shower Flow Sensor • Room Thermostat • Backup Immersion Heater • Twin Zone Programmer • Solar PV Immersion Heater •... -
Page 5: Safety
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. -
Page 6: Installation; Dimentions
Installation: Dimensions 250mm Min 400mm Min 25mm Front Rear 150mm 25mm Side Side 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. •... -
Page 7: Installation; General
Installation: General 1. General There must be no direct connection between the boilers central heating system and the main water supply. When mains water The boiler must be installed by a professional plumber or heat- is required to fill the system directly, all local water bylaws must ing engineer and must be connected to the public low voltage be observed, and any connection made must be disconnected network by a competent person. - Page 8 Installation; General 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. Remove Left Screw. Remove Right Screw. Carefully Lift & Remove Top Section. 28.06.2017...
- Page 9 Installation; General 1 - Expansion vessel 2 - Tundish 3 - Magnetic Filter 4 - Vortex Flow Sensor 5 - Pressure Sensor 6 - Power Board 7 - Pump 8 - Heat Exchanger including AAV 9 - Zone valves 10 - Drain valve 28.06.2017...
-
Page 10: Hydraulic Schematic
Hydraulic schematic Primary flow Primary return Valve Not Included Valve Not Included 1 - Combination Valve with PRV 2 - Expansion vessel 3 - T&P Relief valve 4 - Automatic bypass 5 - Tundish 6 - Magnetic Filter 7 - Vortex Flow Sensor 8 - Pressure Sensor 9 - Power Board 10 - Pump 11 - Heat Exchanger including AAV 12 - Zone valves 13 - Isolating valves (Not included) -
Page 11: Installation: Plumbing
Installation: Plumbing Water supply requirements The Comet Combi operates at 3 bar (controlled by the inlet set) and is capable of delivering over 50 litres per minute. The high quality inlet control set has been designed to make the most of the flow rates available, however the performance of the system is only as good as the mains water supply to the unit. -
Page 12: Hard Water Areas
Installation: Plumbing Balanced cold connection Do not use monobloc mixer taps or showers if the balanced cold connection is not used. Outlets of this type can back-pressurise the unit and result in discharge. A 22mm balanced cold mains outlet can be found on the control set supplied, (see diagram below) Use the balanced cold mains outlet from the inlet control set (as shown in the illustration) to feed all mixer taps / showers, instead of connecting them direct to the cold main supply. -
Page 13: Installation; Discharge Arrangement
Installation: discharge arrangement metal discharge pipe (D1) from temperature relief valve to tundish safety device temperature relief valve tundish 600mm maximum 300mm minimum Discharge below xed grating metal discharge pipe (D2) from tundish, with continuous fall. grating trapped gulley The above diagram is of a typical discharge pipe arrangement. (extract from Building Regulation G3) Note: The discharge will consist of scalding water and steam. - Page 14 Installation: discharge arrangement 1. Ideally below the fixed grating and above the water seal in a trapped gulley. 2. Downward discharges at a low level; i.e. up to 100mm above external surfaces such as car parks, hard standings, grassed areas etc.
-
Page 15: Electrical Connections
All boilers must be protected at the meter position with a 30mA double pole RCD with a minimum of 3mm contact separation The use of EHC controls ensures that boiler interlock is provided accompanied by a suitably rated MCB. If the boiler is not fitted as the use of TRV’s alone will not provide boiler interlock. -
Page 16: Connection Of External Appliances & Controls
The programmer and room thermostat must be connected to the terminal connections as shown in Fig:1. The EHC Twin Zone programmer and room thermostat that are supplied must be connected to the internal terminal block. This must be carried out by a fully qualified electrician. -
Page 17: Electrical Schematic
11. Electrical Schematic BC - back cover BC - back cover UC - upper cover UC - upper cover LC - left cover LC - left cover RC - right cover RC - right cover FC - front cover FC - front cover UB1 - upper board UB1 - upper board UB2 - upper bracket UB2 - upper bracket white brown... -
Page 18: Commissioning
12. Commissioning IMPORTANT: TURN ON THE ELECTRICAL POWER SUPPLY TO THE BOILER. MAKE SURE THAT THE PROGRAMMER IS NOT CALLING FOR HEAT AT THIS STAGE! FILLING THE HOT WATER CIRCUT. 1. Check the pressure in the potable vessel is set to 3 Bar 2. - Page 19 12. Commissioning IF SUPPLIED WITH THE GRUNDFOS UPM3 PUMP 1. Ensure the system is filled with water and correctly vented. 2. Check if the appropriate system installation pressure is reached (see the “TECHNICAL DATA” section) by pressing the down arrow button whilst the control panel is off, the pressure value will be displayed.
-
Page 20: Control Panel
13. Control panel A - pressure [bar] B - flow [l/min] C - power [kW] D - temperature [0°C] E - digital display F - indicator of medium temperature setting (for DHW cylinder) G - indicator of room thermostat and heating activity (for central heating) H - indicator of pump and flow activity I,J - inactive indicators K - inlet temp. indicator L - outlet temp. indicator M - indicator of boiler activity (for central heating) N - indicator of boiler activity (for DHW cylinder) O - control buttons INDICATOR STATUS DETAILS room thermostat calling for heat room temperature has been achieved (boiler inactive) flashing shower sensor activated appliance inactive (NA connection is open) -
Page 21: Operation
14. Operation 1. General 2.8 Summer & Winter Mode Unlike other system boilers such as Gas, Oil and Propane the Comet Combi range of electric boilers require no ignition or light- When in winter mode the Comet Combi will respond to central ing sequence to be executed by the end user. -
Page 22: Servicing
SERVICING MUST BE CARRIED OUT ANNUALLY & SHOULD ONLY BE CARRIED OUT BY COMPETENT INSTALLERS AND ANY SPARE PARTS USED MUST BE PURCHASED FROM EHC. NEVER BYPASS ANY SAFETY DEVICES OR OPER- ATE THE UNIT WITHOUT THEM FULLY OPERATIONAL. YOUR GUARANTEE MAY BE VOID WITHOUT PROOF OF ANNUAL SERVICING. -
Page 23: Guarantee
The benchmark service record has been filled in after each annual service. • The guarantee period starts from the date of purchase which should be registered with EHC. • The extended guarantee is not transferable, and rests with the original householder. -
Page 24: Troubleshooting
17. Troubleshooting Symptom Reason Action check WT3 thermal cut-out has power at top & bottom All indicators on control No power to boiler connections. if WT3 has tripped, investigate why this panel are off device has tripped insufficient pressure (below 0,5bar) increase the system pressure to 1.5 bar A indicator flashing sensor failure... -
Page 25: Technical Data
18. Technical data The Electric Heating Company Comet Combination Unit Electrical Supply 240V~ 50Hz Rated power 14,4 Rated current Minimum Permitted Cable Diameter 10mm 16mm Primary system pressure relief valve setting Primary system operating pressure (min) Thermal cut-out ºC t.cut-out 90-99 Expansion vessel Capacity 12L - Pre-charged 1,50 bar Outlet flow temperature... -
Page 26: Benchmark Service Record
19. Benchmark Service Record MAINS PRESSURE HOT WATER STORAGE SYSTEM COMMISSIONING CHECKLIST This Commissioning Checklist is to be completed in full by the competent person who commissioned the storage system as a means of compliance with the appropriate Building Regulations and then handed to the customer to keep for future reference. Failure to install and commission this equipment to the manufacturer's instructions may invalidate the warranty but does not affect statutory rights. - Page 27 28.06.2017...
- Page 28 If you require any further assistance: Telephone: 01698 820533 Fax: 01698 825697 E-mail: info@electric-heatingcompany.co.uk or visit our website www.electric-heatingcompany.co.uk...
Need help?
Do you have a question about the Comet Combi 14.4kW and is the answer not in the manual?
Questions and answers