Grant Combi 70 V3 User's Installation Manual
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Grant Combi 70 V3 User's Installation Manual

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Part No. DOC 56 Rev. 03 September 2005
USER, INSTALLATION
and
SERVICING INSTRUCTIONS
Combi 70 V3, Combi 90 V3
Combi Max
Vortex Combi 26 and Vortex Combi 36
For Combi 90 V3 and Combi Max Outdoor Modules installation
and wiring please refer to the separate supplement
For use with Kerosene or Gas Oil (Vortex Combi Kerosene only)
Combi 90 V3
After installing the boiler leave these instructions with the User
This appliance is deemed a controlled service and specific regional statutory requirements
may be applicable

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Summary of Contents for Grant Combi 70 V3

  • Page 1 Part No. DOC 56 Rev. 03 September 2005 USER, INSTALLATION SERVICING INSTRUCTIONS Combi 70 V3, Combi 90 V3 Combi Max Vortex Combi 26 and Vortex Combi 36 For Combi 90 V3 and Combi Max Outdoor Modules installation and wiring please refer to the separate supplement...

  • Page 2: Table Of Contents

    LIST OF CONTENTS Section Subject Page Combi V3 and Combi Max user instructions ........3 Vortex Combi user instructions ............4 Combi V3, Combi Max and Vortex Combi User instructions ..5 Technical information ..............8 General boiler information ............... 16 Boiler installation ................

  • Page 3: Combi V3 And Combi Max User Instructions

    1 - COMBI V3 and COMBI MAX USER INSTRUCTIONS About your Combi V3 or Combi Max boiler Your Grant Combi boiler is fully automatic when the When setting the times for the 'on' periods it is useful Boiler On/Off switch is set to ON, and will provide to remember that it might take up to an hour for the domestic hot water at mains pressure on demand and house to become warm, especially in colder weather.

  • Page 4: Vortex Combi User Instructions

    2 - VORTEX COMBI USER INSTRUCTIONS About your fuel About your Vortex Combi boiler Your Vortex Combi boiler is fully automatic once switched Grant Vortex Combi boilers only operate on Class C2 on, and will provide domestic hot water at mains pressure Kerosene to BS 2869:1998.

  • Page 5: Combi V3, Combi Max And Vortex Combi User Instructions

    3 - COMBI V3, COMBI MAX and VORTEX COMBI USER INSTRUCTIONS Fig. A - Combi V3 and Combi Max boiler Controls Fig. B - Boiler controls (Vortex Combi 36 shown) Combi V3, Combi Max and Vortex Combi models...
  • Page 6 3 - COMBI V3, COMBI MAX and VORTEX COMBI USER INSTRUCTIONS If the burner still fails to light after carrying out these Lighting your boiler (see Fig. A or B) checks then a fault exists. Switch off the electricity supply to the boiler and contact your Service engineer. 1 Ensure that - There is sufficient fuel in the supply tank and all fuel supply valves are open, the water supply is Domestic hot water system...
  • Page 7 Service engineer. must be removable to provide access for servicing for the Combi 70 V3 and Vortex Combi 36. 4 Overheat thermostat - Your boiler is fitted with a The Combi 90 V3, Combi Max and Vortex Combi 26...

  • Page 8: Technical Information

    4 - BOILER TECHNICAL INFORMATION Boiler technical data - Combi V3 and Combi Max boilers Model Combi 70 V3 Combi 90 V3 Combi Max Boiler water content litre 17.6 * Weight (dry) Max. heat input (Kerosene) 22.0 27.6 36.8 Btu/h...

  • Page 9: Boiler Technical Information

    4 - BOILER TECHNICAL INFORMATION Boiler technical data - Vortex Combi boilers Model Vortex Combi 26 Vortex Combi 36 Boiler water content litre 48.5 53.5 (including 32.5 litre primary store) 10.7 11.8 * Weight (dry) Max. heat input (Kerosene) Btu/h 88 700 123 000 Connections:...
  • Page 10 Flue gas temperatures taken at combustion door test point will be approximately 25°C higher for the Combi 90 V3 and Combi Max. Flue gas temperature taken at the top of the boiler will be 20°C higher for the Combi 70 V3. Approximate air damper settings Note: Burners are supplied factory set at the outputs shown.
  • Page 11 4 - BOILER TECHNICAL INFORMATION Vortex Combi oil boilers using Class C2 kerosene Note: Vortex Combi boilers are only for use with kerosene. Burner Model Heat Output Nozzle Smoke Burner Fuel flow Flue gas eff * type press. head rate temp.
  • Page 12 4 - BOILER TECHNICAL INFORMATION Boiler dimensions - Combi V3 and Combi Max Fig. 1 Note: Water connections may be from the rear, left or right hand side. If using side exit flue, it must be on the opposite side to the water connections. Water schematic of boiler - Combi V3 and Combi Max Heating Heating...
  • Page 13 4 - BOILER TECHNICAL INFORMATION Boiler dimensions - Vortex Combi Fig. 3 - Vortex Combi 26 dimensions Fig. 3a - Vortex Combi 36 dimensions Combi V3, Combi Max and Vortex Combi models...
  • Page 14 4 - BOILER TECHNICAL INFORMATION 4.10 Water schematic of boiler - Vortex Combi Fig. 4 Combi V3, Combi Max and Vortex Combi models...

  • Page 15: General Boiler Information

    5 - GENERAL BOILER INFORMATION Boiler description The Combi and Vortex Combi boilers are automatic White system ..High level concentric balanced flue pressure jet oil boilers designed for use with a sealed kit - components available: central heating system and will provide domestic hot Extensions 225 mm, 450 mm, 950 mm and water at mains pressure.

  • Page 16: General Boiler Information

    If a two pipe system or Tiger Loop system is used, an additional flexible fuel line (600 mm) and " to " BSP male adaptor are available from Grant Engineering (UK) Limited (Part No. RBS104). Combi V3, Combi Max and Vortex Combi models...
  • Page 17 (a flexible fuel line (600 mm) and " to " BSP 2 As supplied the burner is suitable for a single pipe male adaptor are available from Grant Engineering system. (UK) Limited - Part No. RBS104). See Section 5.3.6. 5.3.4 Two pipe system - (See Fig. 6) 5 The pump vacuum should not exceed 0.4 bar.
  • Page 18 5 - GENERAL BOILER INFORMATION Fig. 6 - Two pipe system 5.3.5 Tiger Loop system - (See Figs. 7 and 8) Note: To prevent any possibility of fuel fumes entering the building, the Tiger Loop must be 1 When the storage tank is below the burner, an fitted outside.
  • Page 19 By-pass screw (see Fig. 9) into the tapping in the return port. 7 Flexible fuel lines and adaptors are available to purchase from Grant Engineering (UK) Ltd. 2 The By-pass screw is supplied in the boiler accessory pack.
  • Page 20 5 - GENERAL BOILER INFORMATION Electricity supply Air supply 1 A 230/240 V ~ 50 Hz mains supply is required. See Figs. 10 and 11 The boiler must be earthed. A sufficient permanent air supply to the boiler should be provided: 2 The supply must be fused at 5 Amp and there must a For proper combustion of fuel and effective only be one common isolator for the boiler and...
  • Page 21 5 - GENERAL BOILER INFORMATION Fig. 11 - Combustion and ventilation air supply for conventional flue boilers Minimum size of air vents required - see Figs. 10 and 11 Combi 70 V3 Combi 90 V3 Combi Max Vortex Combi 26...
  • Page 22 - Combi 90 V3 and Combi Max - and on top of the Combi 70 V3 boiler . Fig. 12 - Typical conventional flue with brick chimney Conventional flue system - Vortex Combi Under no circumstances can Grant Vortex Combi boilers be installed with existing flue systems.
  • Page 23 5 - GENERAL BOILER INFORMATION Fig. 13 - Vortex Combi typical conventional flue with brick chimney 3 The flue terminal must be at least 600 mm from 6 The internal flue diameter for all models must be any opening into the building, and 600 mm above 100 mm (4 in).
  • Page 24 5 - GENERAL BOILER INFORMATION 10 Refer to the locally applicable Building Balanced flue options Regulations, BS 5410:1 and OFTEC Installation Requirements (Books 2 and 3) for further guidance Apart from a conventional flue, several balanced flue on conventional flue systems. options are available for use with Grant Combi boilers.
  • Page 25 5 - GENERAL BOILER INFORMATION Extensions are available which extend the flue by The minimum dimensions for locating the terminal 225 mm, 450 mm or 950 mm. An adjustable from building features (windows, doors, etc.) are extension of 275 to 450 mm is also available. shown in Fig.
  • Page 26 5 - GENERAL BOILER INFORMATION Fig. 14 - External flue (Green system) Combi V3, Combi Max and Vortex Combi models...
  • Page 27 5 - GENERAL BOILER INFORMATION Fig. 15 - Clearances for Balanced flues Terminal position Min. distance (mm) Distances measured to rim of terminal. * 600 A Below a gutter or sanitary pipework Horizontal from an opening, air brick or window Clearances recommended by Grant **300 Above ground or balcony level...
  • Page 28 All models: 3 The Combi 70 V3 and Vortex Combi 36 require a 1 A 15 mm discharge pipe must be connected to the removable section of worktop (if fitted) above the safety valve outlet connection.
  • Page 29 5 - GENERAL BOILER INFORMATION 5.12 Sealed central heating system 4 The system design pressure (cold) should be See Fig. 16 between 0.5 and 1.0 bar. This pressure is 1 The boilers are only suitable for use with a sealed equivalent to the maximum static head (see Fig.
  • Page 30 5 - GENERAL BOILER INFORMATION 5.13 Domestic hot water system 1 To maintain a longer and more consistent hot water Note: Hard Water temperature, a flow restrictor is factory fitted to all A water hardness test kit is supplied with the models except the Combi Max and Vortex Combi boiler.
  • Page 31 5 - GENERAL BOILER INFORMATION 5.15 Underfloor heating systems 5.17 Condensate disposal - Vortex Combi See Fig. 17 When in condensing mode the Vortex Combi boiler produces condensate from the water vapour in the flue On underfloor systems it is essential that the return is gases.
  • Page 32 5 - GENERAL BOILER INFORMATION On external discharge systems to a gully or soakaway, the bung should be removed from the overflow outlet. If connected to an external soil stack, the bung must be fitted on the trap. If there is any discharge of condensate from the overflow outlet, this could indicate a blockage (possibly due to freezing).
  • Page 33 5 - GENERAL BOILER INFORMATION Domestic hot water supply always takes priority over If the Heating switch is set to either TIMED or central heating. If a demand for hot water occurs CONSTANT, the boiler will return to the central during a period of central heating, the boiler mode will heating mode, with the Heating pump and burner automatically change to provide hot water until the...

  • Page 34: Boiler Installation

    5 - GENERAL BOILER INFORMATION Radiators:- 1 Size radiators with a mean water temperature of 60°C. Flow temperature 70°C 2 Design system controls with programmable room Return temperature 50°C thermostats or use weather compensating controls Differential 20°C to maintain return temperatures below 55°C. Underfloor:- Flow temperature 50°C...
  • Page 35 6 - BOILER INSTALLATION High level and vertical balanced flue See Fig. 21 and 21a If the boiler is to be used with the high level balanced flue (White system) make the hole in the wall as shown in Fig. 21a. Note: Dimension B given in Fig.
  • Page 36 6 - BOILER INSTALLATION Make the water connections Combi V3 and Combi Max water connections Holes are provided in the rear of the casing side panels to allow the condensate pipe to be run through the back of the Note: Water connections may be from the rear, left or boiler.
  • Page 37 6 - BOILER INSTALLATION Connect a conventional flue Expansion vessel 1 Lift off the rear part of the case top. The expansion vessel fitted is supplied with a 2 Remove the insulation from the rear top panel (do charge pressure of 1.0 bar (equivalent to a max. not discard it) and remove the blanking panel.
  • Page 38 6 - BOILER INSTALLATION 5 Connect a room thermostat as follows: Optional Grant internal timer Remove the room thermostat link wire (6 and 7 on Combi V3 and Combi Max or 4 and 5 on Important: Ensure electrical supply to boiler has Vortex Combi) from the left hand terminal been isolated before fitting the timer.
  • Page 39 6 - BOILER INSTALLATION 6.10 Connect the fuel supply See Fig. 9 2 Connect the flexible fuel line to the rigid supply using the adaptor supplied. The supply enters through one If a two pipe system is to be used refer to Section 5.3.6. of the holes at the bottom of the case sides.

  • Page 40: Fill And Vent The System

    7 - FILL AND VENT THE SYSTEM Fill the system 1 Automatic air vent(s) are fitted to the top of the 7 Continue to fill the system until the pressure gauge boiler. Check that the small cap on the top of each indicates between 0.5 and 1.0 bar.

  • Page 41: Commissioning

    8 - COMMISSIONING Refer to Fig. 25 or 25a for boiler controls Fig. 25 - Combi V3 and Combi Max boiler Controls Fig. 25a Boiler controls (Vortex Combi 36 shown) It is important that the following commissioning 1 Check that the water system has been vented and procedure is carried out to ensure safe and efficient pressurised, and there are no leaks.
  • Page 42 Combi 90 V3, Combi Max and Vortex Combi, and close the boiler fuel supply valve and switch off the on the top of the Combi 70 V3. electricity supply. If there is any possibility of the boiler being left during frost conditions, then the boiler and system should be drained.

  • Page 43: Information For The User

    9 - INFORMATION FOR THE USER The User must be advised (and demonstrated if 7 Tell the User the system pressure and show them necessary) of the following important points:- the position of the safety valve discharge pipe. 1 How to light and turn off the boiler and how to 8 Show the User how to reset the overheat thermostat operate the system controls.

  • Page 44: Boiler Servicing

    Place it on the floor, the Combi 90 V3, Combi Max and Vortex Combi, or taking care not to strain the flexible pipe. the cleaning cover gasket on the Combi 70 V3, Replace if necessary. 3 Disconnect the flexible air tube from the burner.
  • Page 45 10 - BOILER SERVICING Fig. 28 - Combi Max baffle positions Fig. 29 - Vortex Combi 26 Fig. 30 - Vortex Combi 36 7 Vortex Combi - Pull out the spiral turbulators from 9 Vortex Combi - Remove the condensate trap and the heat exchanger tubes.
  • Page 46 Check the electrode settings - Electrode tips Refer to the Commissioning instructions starting on approximately 4 mm apart and 2 to 2.5 mm (Combi 70 V3) or 3 to 3.5 mm (Combi 90 V3, page 41. Combi Max, Vortex Combi) in front of the nozzle, see Fig 32.

  • Page 47: Boiler Components

    11 - BOILER COMPONENTS Fig. 33 - Combi V3 and Combi Max components/connections Main Components Connections Cold water inlet isolating valve Diverter valve - cold water inlet Lower pump union Diverter valve - primary inlet Upper pump union - isolating valve Diverter valve - primary outlet Heating check valve Plate heat exchanger - hot water outlet...
  • Page 48 11 - BOILER COMPONENTS Fig. 33a - Vortex Combi components/connections Main Components Connections/pipe Circulating pump - heating Heating system flow - push-fit elbow Circulating pump - hot water (primary store) Heating system return - push-fit elbow Plate heat exchanger Cold water inlet - push-fit elbow Pressure switch Hot water outlet - push-fit elbow Flow switch...

  • Page 49: Wiring Diagrams

    12 - WIRING DIAGRAMS 12.1 Control panel wiring diagram - Combi V3 and Combi Max Chassis earth Pressure switch to bolt in boiler neon (amber) casing Chassis earth to bolt in boiler Mains supply casing (use 2 pole isolator Burner with power 'on' indicator) Frost...
  • Page 50 12 - WIRING DIAGRAMS 12.3 Control panel wiring diagram - Vortex Combi Remove link 8 to 9 If room thermostat is fitted (yellow) if timer is fitted Flow remove link 4 to 5 and connect room thermostat in its place switch Frost thermostat Pressure...
  • Page 51 12 - WIRING DIAGRAMS 12.5 Typical connection of external timer Important: If a remote timer is used, it must be a single channel 230V unit incorporating voltage free output contacts. 12.6 Connection of Grant remote wall mounted mini programmer 12.7 Grant programmable room thermostat A programmable room thermostat - Part No.

  • Page 52: Fault Finding

    13 - FAULT FINDING Combi V3, Combi Max and Vortex Combi models...
  • Page 53 13 - FAULT FINDING Combi V3, Combi Max and Vortex Combi models...
  • Page 54 13 - FAULT FINDING Combi V3, Combi Max and Vortex Combi models...
  • Page 55 13 - FAULT FINDING Combi V3, Combi Max and Vortex Combi models...
  • Page 56 13 - FAULT FINDING Combi V3, Combi Max and Vortex Combi models...
  • Page 57 13 - FAULT FINDING Combi V3, Combi Max and Vortex Combi models...
  • Page 58 13 - FAULT FINDING Combi V3, Combi Max and Vortex Combi models...
  • Page 59 14 - BURNER SPARE PARTS 14.1 Riello RDB burner - exploded view Combi 70 V3 Description Riello Grant Description Riello Grant Part No. Part No. Part No. Part No. Not applicable Capacitor 4.5 µF 3002837 RBS149 Flange 3005786 RBS28 Seal kit 3008878 RBS140 Combustion head LD2SX (70V3) 3008859...
  • Page 60 14 - BURNER SPARE PARTS Burner Heads Combi V3, Combi Max and Vortex Combi models...

  • Page 61: Health And Safety Information

    15 - HEALTH AND SAFETY INFORMATION Under the Consumer Protection Act 1987 and Section 6 of the Health & Safety at Work Act 1974, we are required to provide information on substances hazardous to health (COSHH Regulations 1988). Adhesives, sealants and paints used in the manufacture of the product are cured and present no known hazards when used in the manner for which they are intended.

  • Page 62: Ec Declaration Of Conformity

    16 - EC DECLARATION OF CONFORMITY We declare that the Combi 70 V3, Combi 90 V3, Combi Max, Vortex Combi 26 and Vortex Combi 36 Oil Boilers equipped with Riello RDB burner approved to EN 267: 1991 satisfy the requirements of the following European...
  • Page 63 Combi V3, Combi Max and Vortex Combi models...
  • Page 64 All goods sold are subject to our official Conditions of Sale, a copy of which may be obtained on application. © Grant Engineering (UK) Limited 2005. No part of this manual may be reproduced by any means without prior written consent.

This manual is also suitable for:

Combi maxCombi 90 v3Vortex combi 26Vortex combi 36

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