manualshive.com logo in svg

EHC Comet Combi 12kW, Installation & Technical Manual, Page: 1 / 28

Share
Download
EHC Comet Combi 12kW Installation & Technical Manual Download 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: [email protected]

Summary of Contents for Comet Combi 12kW

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 2: ......

Page 3: ...atic 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 ...

Page 4: ...s to the specification 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 cal...

Page 5: ... a sealed pressurised primary system Following installation or the primary system the unit should be flushed 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 ...

Page 6: ... 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 recycla...

Page 7: ...s valve which should be set to allow the minimum flow 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 cy...

Page 8: ...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 ...

Page 9: ...7 5 Installation General 1 6 9 2 3 10 5 8 4 7 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 ...

Page 10: ... 14 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 14 Drain Valve 6 Hydraulic schematic ...

Page 11: ...mestic installation 1 5 bar and 25 l m should be regarded as the minimum The maximum recommended mains pressure for the inlet control set is 16 bar Consideration should be given to upgrading existing 15mm cold mains pipework to a larger size if the recommended minimum pressure flowrate is not being achieved Cold mains pipework 1 Run the cold water mains pipework to the location of the Comet Combi ...

Page 12: ...tchen sink All outlets in the house will be set to 3 bar and thus automatically balancing the system The expansion relief valve section must still be mounted just above the boiler see diagram below Hot Water Pipework Ensure the first part of the hot water pipework is run in 22mm pipe This can be reduced to 15mm depending on the type of taps outlets used etc Your aim should be to reduce the volume ...

Page 13: ... the tundish should terminate in a safe place where there is no risk to persons in the vicin ity of the discharge be of metal and A Be at least one pipe size larger than the nominal outlet size of the safety device unless its total equivalent hy draulic resistance exceeds that of a straight pipe 9m long i e discharge pipes between 9m and 18m equivalent resistance length should be at least two size...

Page 14: ...ation should be given to the installation of an electronically operated device to warn when discharge takes place Worked example The example below is for G1 2 temperature relief valve with a discharge pipe D2 having four elbows and length of 7m from the tundish to the point of discharge From Table 1 Maximum resistance allowed for a straight length of 22mm copper discharge pipe D2 from a G1 2 tempe...

Page 15: ...ertificates completed and issued to the customer Never open the front cover of the boiler until all power supplies to the boiler have been disconnected ELECTRICAL CONNECTIONS The electrical supply cables can be routed in to the boiler from the top left hand side of the unit Cable grommets are supplied and fitted to the boiler s cable entry point All cables should be secured to meet current regulat...

Page 16: ...ires from the flow sensor will then be connected to the NA connections shown in Fig 1 When the shower is in use the flow sensor will create an open circuit on the NA connections This will switch the boiler OFF when the shower is in use protecting the power supply within the property External Control Connections The Comet Combi control system is internally wired and protected with a 1 amp fuse The ...

Page 17: ...OGRAMMER L N PE 1 2 3 XF CH HW N L PE BC back cover UC UC upper cover LC LC left cover OP FC RC right cover FC front cover UB1 UB1 upper board UB2 UB2 upper bracket 1 2 3 4 5 6 7 8 9 10 11 12 XP Thw Thw grey orange blue brown yellow green brown white yellow green F1 1A yellow green brown white HW CH NZ1 NZ2 WT M M PE PE BC back cover UC upper cover LC left cover RC right cover FC front cover UB1 u...

Page 18: ...ystem If you are unsure of the correct dose rate contact Fernox on 03301007750 for advice 3 Re fill the system and circulate the F3 cleaner prior to the boiler being fired up Commission the system in the normal way The cleansing agent must be in the system for a minimum 1 hour with the system running at normal operating temperature A longer period of time would be more beneficial to the cleansing ...

Page 19: ...iler is reached the H indicator is on with a constant light The pump should self vent after a short period of running If necessary assist the venting process in the following way Warning the screw head in the centre of the pump is not intended to be used to assist venting of the pump Damage to the pump internals may occur close the isolation valve on the outlet leave boiler running for 15 sec open...

Page 20: ...g for heat off room temperature has been achieved boiler inactive flashing shower sensor activated appliance inactive NA connection is open on pump is running minimum system flow rate has been acheived flashing insufficient flow rate failure condition boiler inactive red boiler operating boiler active green system temp has been achieved boiler inactive Temp in CH system is lower than set however t...

Page 21: ...re indicator N will also change from Red to Green 6 The boiler Flow Rate should not be less than 8 l min during operation To check this setting press the right hand button a number of times until only indicator B is illuminated and then read the figure on the digital display If the figure is well below the 8 l min call a Service Engineer for assistance 7 To check the amount of kW energy being used...

Page 22: ...e expansion vessel is a Schrader standard car tyre type Air or CO2 can be used to pressurise the expansion vessel 4 Remove the head on the inlet control set by unscrewing and clean the mesh filter within 5 The benchmark service record supplied within this manual should be updated at each service 6 Make sure the pressure in the Secondary expansion vessel is charged to 1 5 bar De pressurise the heat...

Page 23: ...stallations are made only in the UK Channel Islands Republic Of Ireland The water supply does not have a Chloride content greater than 250ppm Units are not installed with uncontrollable heat sources E g Wood Burning Stoves 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 fitted to the Boiler and it...

Page 24: ...or flashing return sensor failure check sensor and replace as necessary L indicator flashing flow sensor failure check sensor and replace as necessary G indicator flashing master appliance of shower sensor operat ing NA open circuit check master appliance or shower sensors are working correctly N indicator is Off no call for hot water check programmer and room stats are calling for heat no hot wat...

Page 25: ...rimary Max bar 2 5 Cylinder operating pressure Secondary Max bar 5 5 Thermostat ºC 5 to 66 deg C Tank capacity Ltr 140 Temperature pressure valve 95 C 6bar TP152 1 2 Expansion vessel 2Ltr 3 bar charge pressure Hydraulic connections Copper pipe ø 22 x 1 Optional Immersion Heater 3000W 240 Volt Weight Net kg 106 8 Gross 246 Dimensions unit dimensions mm 1745 x 580 x 630 WARNING TO THE USER 1 Do not ...

Page 26: ... control system if applicable Is the cylinder solar or other renewable compatible What is the hot water temperature at the nearest outlet All appropriate pipes have been insulated up to 1 metre or the point where they become concealed UNVENTEDSYSTEMS ONLY Where is the pressure reducing valve situated if fitted What is the pressure reducing valve setting Has a combined temperature and pressure reli...

Page 27: ...27 28 06 2017 27 ...

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 ...

Reviews:

No comments