Grant Combi 70 V3, Combi Max, Vortex Combi 26, Vortex Combi 36 User's Installation Manual

USER, INSTALLATION

and

SERVICING INSTRUCTIONS

Combi 70 V3, Combi 90 V3

Combi Max

Vortex Combi 26 and Vortex Combi 36

For use with Kerosene or Gas Oil (Vortex Combi Kerosene only)

Part No. DOC 56 Rev. 03 September 2005

This appliance is deemed a controlled service and specific regional statutory requirements

may be applicable

After installing the boiler leave these instructions with the User

For Combi 90 V3 and Combi Max Outdoor Modules installation

and wiring please refer to the separate supplement

Combi 90 V3

Combi V3, Combi Max and Vortex Combi models

Subject PageSection

1 Combi V3 and Combi Max user instructions .................................. 3

2 Vortex Combi user instructions ....................................................... 4

3 Combi V3, Combi Max and Vortex Combi User instructions ........ 5

4 Technical information ...................................................................... 8

5 General boiler information ............................................................... 16

6 Boiler installation ............................................................................. 34

7 Fill and vent the system ................................................................... 40

8 Commissioning ................................................................................. 41

9 Information for the user ................................................................... 43

10 Boiler servicing ................................................................................ 43

11 Boiler components ........................................................................... 47

12 Wiring diagrams ............................................................................... 49

13 Fault finding ..................................................................................... 52

14 Burner spares ................................................................................... 59

15 Health and safety information .......................................................... 61

16 EC declaration of conformity .......................................................... 62

LIST OF CONTENTS

Date: ..............................

Commissioning engineer: .............................................................................. Tel. No: ....................................

Boiler model/output: ........................................ Btu/h Fuel type: Kerosene or Gas oil

Nozzle size: .................................... Pump pressure: .................... Air setting: ...........................

Flue gas % CO2: ............................. Net flue gas temp:................ Smoke No:...........................

It is recommended that the boiler should be regularly serviced, at least once a year, and the details entered in the Boiler Handbook by the Service Engineer.

SERVICE LOG

COMMISSIONING REPORT

Combi V3, Combi Max and Vortex Combi models

1 - COMBI V3 and COMBI MAX USER INSTRUCTIONS

About your Combi V3 or Combi Max boiler

1.1

Your Grant Combi boiler is fully automatic when the Boiler On/Off switch is set to ON, and will provide domestic hot water at mains pressure on demand and central heating when the boiler and heating system controls call for it.

Your boiler may be fitted with either an internal electronic 7-day timer or mechanical 24-hour timer. Alternatively, your installer may have fitted a separate timer, in a convenient position remote from the boiler.

Whichever type of timer is connected to your boiler, it will allow you to set the operating times of the central heating. Domestic hot water is available continuously, provided the boiler is switched on, irrespective of the settings on the timer.

To access the controls, pull off the front door from the boiler.

1 Heating switch - When set to TIMED the boiler will

only provide central heating during the 'on' periods set on the timer. When set to the HOT WATER ONLY position the boiler will not provide central heating. When set to the CONSTANT position the boiler provides central heating continuously, overriding all of the timer settings.

2 Boiler On/Off - This switches the boiler on and off.

Note: The timer (if fitted) will still operate with this

switch set to OFF, providing the electricity supply to the boiler is still switched on, but the boiler will not operate to provide domestic hot water.

3 Boiler thermostat - This control allows

adjustment of the temperature of the water leaving the boiler to heat either the radiators or the hot water, via the hot water heat exchanger.

The boiler thermostat has an operating range of 75°C to 85°C. For optimum hot water operation,

ensure this is set to maximum.

To ensure that the hot water performance is not reduced first thing in the morning, or in the evening if the heating is off through the day, set the heating timer to switch the heating on at least 30 minutes before hot water will normally be required in the morning (or evening).

When setting the times for the 'on' periods it is useful to remember that it might take up to an hour for the house to become warm, especially in colder weather. Also the effect of the central heating will remain for a time when the central heating is turned off.

Do not forget that if you require central heating during an 'off' period, simply set the Heating switch to CONSTANT, remember the switch must be reset to TIMED at a later time for the timer to return to your pre-set periods.

The boiler will operate on either Class C2 Kerosene or Class D Gas Oil to BS 2869:1998. Your Installer will have informed you of the type of fuel your boiler has been set to use and he will have marked this on the boiler data label. You should always quote the type of fuel you require when ordering from your supplier.

Note: Low level balanced flue installations (flue terminal through the wall) must only be used with Kerosene, unless the flue terminal is higher than 2.0 m above outside ground level.

Do not wait until the fuel runs out before you order some more. Sludge in the bottom of the tank may be drawn into the fuel lines. If it is possible, switch off the boiler when the new supply is delivered and leave the fuel to settle for an hour before restarting the boiler.

Boiler controls (see Fig. A)

1.2

About your fuel

1.4

Useful tips

1.3

Combi V3, Combi Max and Vortex Combi models

Your Vortex Combi boiler is fully automatic once switched on, and will provide domestic hot water at mains pressure on demand and central heating when the boiler and heating system controls call for it. The boiler On/Off switch incorporates a 'mains on' neon, see Fig. B, which lights when the boiler is switched on, but does not necessarily indicate the burner is firing.

To access the controls, pull off the front door from the boiler.

1 Store switch - Allows the primary store to be

manually switched off if hot water is not required. With the switch set to OFF, the burner will not fire to maintain the water temperature in the store and the hot water (store) pump will not operate.

IMPORTANT: The boiler will not produce hot water when the Store switch is set to OFF.

2 Heating switch - When set to TIMED, the boiler

will only provide central heating during the 'on' periods set on the timer. When set to OFF, the boiler will not provide central heating. When set to CONSTANT, the boiler provides central heating continuously, overriding all of the timer settings.

Note: Provided the Store switch is set to ON, the boiler will provide hot water on demand irrespective of the setting on the Heating switch and will override the heating as required to maintain the temperature of the store.

3 Boiler On/Off - This switches the boiler on and off.

Note: The internal timer (if fitted) will still operate

with this switch set to OFF, provided that the electricity supply to the boiler is still switched on, but the boiler will not operate to provide domestic hot water.

4 Boiler heating thermostat - Controls the temperature

of the water leaving the boiler to the central heating system. Operation of this control does not affect the temperature of the hot water flowing to the taps.

Grant Vortex Combi boilers only operate on Class C2 Kerosene to BS 2869:1998.

You should always quote the type of fuel you require when ordering from your supplier.

About your Vortex Combi boiler

2.1

Boiler controls (see Fig. B)

2.2

2 - VORTEX COMBI USER INSTRUCTIONS

About your fuel

2.3

Combi V3, Combi Max and Vortex Combi models

Fig. B - Boiler controls (Vortex Combi 36 shown)

Fig. A - Combi V3 and Combi Max boiler Controls

3 - COMBI V3, COMBI MAX and VORTEX COMBI USER INSTRUCTIONS

Combi V3, Combi Max and Vortex Combi models

1 Ensure that - There is sufficient fuel in the supply tank

and all fuel supply valves are open, the water supply is on, the electricity supply to the boiler is off, the Boiler On/Off switch is set to OFF, the Heating switch is set to TIMED, the black pointer on the pressure gauge is not below the red pointer, the room thermostat (if fitted) is at the desired setting and the timer is correctly set.

2 Switch on the electricity supply to the boiler.

3 Set the On/Off switch to ON.

4 The boiler will light automatically to heat the water

stored in the boiler. If the timer is set to an 'on' period the boiler will continue to run to provide central heating. If a hot tap is opened the boiler will supply hot water.

For short periods - Set the On/Off switch to OFF. To restart, simply set the switch to ON.

For long periods: Set the On/Off switch to OFF and switch off the electricity supply to the boiler. If required, the fuel supply valve may be closed and the water and electricity supplies turned off at the mains.

To restart, refer to the full lighting instructions above.

1 Check that the boiler On/Off switch is set to ON.

2 Check that the timer is working and is in an 'on' period.

3 Check that all thermostats are set to the desired

setting and are calling for heat.

4 Check if the burner 'Lock-out' reset button is lit. If it

is, press it to start the burner. If the burner fails to light and goes to 'Lock-out' again, check that you have sufficient fuel in the storage tank and that the fuel supply valve is open.

5 Ensure that a fuse has not blown or that the

electricity supply has not failed.

6 Check to see if the overheat thermostat has operated

(see note 4 in Section 3.6).

7 Check that the black pointer on the pressure gauge

is not below the red pointer.

8 If the heating system water pressure falls below 0.2

bar the boiler low pressure cut-out switch will activate and an amber neon on the control panel (see Fig. A or B) will light. The system must be recharged to between 0.5 and 1 bar. If the heating system loses pressure on a regular basis then contact your Installer to investigate the cause.

If the burner still fails to light after carrying out these checks then a fault exists. Switch off the electricity supply to the boiler and contact your Service engineer.

The boiler will supply domestic hot water whenever a hot tap is opened, providing the Boiler On/Off switch is set to ON.

Note: The Vortex Combi Store switch must also be set to 'ON' for hot water to be supplied.

The flow of water from the taps (hot or cold) depends upon the mains water pressure, and in some homes it may not be possible to use more than one tap at the same time.

The boiler operates on a sealed central heating system which will have been pressurised by your Installer. He will have set the red pointer on the pressure gauge (see Fig. A or B), to indicate the system pressure (when cold) usually between

0.5 and 1.0 bar. Do not adjust this pointer. The black pointer indicates the actual system pressure which will increase slightly when the boiler is operating. If the black pointer falls below the red pointer (when the boiler is switched off and cold), you should contact your Service Engineer to repressurise the system. If the system requires frequent repressurising, ask your Service Engineer to check the heating system for leaks.

If the heating system water pressure falls below 0.2 bar the boiler low pressure cut-out switch will activate and an amber neon on the control panel (see Fig. A or B) will light. The system must be recharged to between

0.5 and 1 bar. If the heating system loses pressure on a regular basis then contact your Installer to investigate the cause.

The boiler is fitted with an automatic air vent which removes air trapped in the boiler. Any air trapped in the radiators needs removing by venting the radiators using the vent screw at the top of the radiators. Only vent a radiator if the top is cool and the bottom is hot. Excessive venting will reduce the system pressure, so only vent when necessary and check the system pressure as mentioned above.

Note: Your sealed system may incorporate a 'Top-Up' vessel, advice on how to use it should be obtained from your Installer.

The boiler is fitted with a safety valve to release excess pressure from the system. If water or steam is emitted from the end of the safety valve discharge pipe, switch off the boiler and contact your Installer or Service engineer.

3 - COMBI V3, COMBI MAX and VORTEX COMBI USER INSTRUCTIONS

Lighting your boiler (see Fig. A or B)

3.1

Turning off your boiler (see Fig. A or B)

3.2

Points to check if burner fails to light

3.3

Domestic hot water system

3.4

Sealed central heating system

3.5

Combi V3, Combi Max and Vortex Combi models

The expansion vessel air charge must be checked annually. Failure to maintain an adequate air charge in the vessel may invalidate the warranty.

To re-pressurise the system by adding water:

1 Only add water to the system when it is cold and

the boiler is off. Do not overfill.

2 Ensure the flexible filling loop is connected and that

the shut off valve connecting it to the boiler is open and the double check valve at the front is closed.

A valve is open when the operating lever is in line with the valve, and closed when it is at right angles to it.

3 Gradually open the double check valve on the front

of the filling loop until water is heard to flow.

4 Vent each radiator in turn, starting with the lowest

one in the system, to remove air.

7 Continue to fill the system until the pressure gauge

indicates the required pressure between 0.5 and

1.0 bar. Close the fill point valve.

9 Close the valves either side of the filling loop and

disconnect the loop.

The temperature of the water leaving the boiler to the radiators can be increased by turning the boiler (heating) thermostat (see Fig. A or B) clockwise.

With the Heating switch set to TIMED, the boiler will provide central heating whenever the timer is in an 'on' period and the room thermostat (if fitted) is calling for heat.

For summer time operation, when central heating is not required, set the Heating switch (see Fig. A) to HOT WATER ONLY, or OFF for Vortex Combi (see Fig. B).

1 Boiler controls - Refer to Section 2.2 or 3.2.

2 Pressure switch - If the heating system water pressure

falls below 0.2 bar the boiler low pressure cut-out switch will activate and an amber light will illuminate. The system must be recharged to between 0.5 and 1 bar. If the heating system loses pressure on a regular basis then contact your Installer to investigate the cause.

3 Burner Lock-out reset button - If there is a burner

malfunction, a built-in safety circuit switches the burner off and the Lock-out reset button will light. Usually such malfunctions are short lived and pressing the reset button will restore normal operation. If the burner continually goes to 'Lock-out' a fault exists or the fuel supply is low. If you have sufficient fuel, you will need to call your Service engineer.

4 Overheat thermostat - Your boiler is fitted with a

safety overheat thermostat which will automatically switch off the boiler in the case of a control malfunction causing overheating. A red neon (see Fig. A or B) will light indicating the thermostat has operated.

If your boiler goes off and you try to light it but nothing happens and the 'Lock-out' reset button on the burner is not lit, the overheat thermostat has probably operated. The boiler will not light until the thermostat is reset. To reset, unscrew the small plastic cap (see Fig. A or B), press the button then replace the cap. Note: You may have to wait for the boiler to cool down before the button will reset. If this condition continually repeats, contact your Service engineer.

5 Ventilation - Always ensure that the boiler has

adequate ventilation. Any ventilation openings provided by the Installer must not be obstructed. Periodically check that they are clear. Do not attempt to 'box in' the boiler or build a compartment around it before consulting your Installer. Do not place any combustible material around or on the boiler or flue pipe.

6 Flue terminal - The flue terminal on the outside

wall must not be obstructed or damaged. In severe conditions check that the terminal does not become blocked by snow.

7 Frost protection - Your Installer may have fitted a

frost thermostat. If not, and you are likely to be away for a short time, leave the boiler on with the boiler thermostat set at a low setting. For longer periods the boiler and system should be drained. Contact your Service engineer for draining and filling the system.

8 Cleaning and servicing - Lightly wipe over the

case with a damp cloth and a little detergent. Do not use abrasive pads or cleaners. You should have your boiler serviced at least once a year to ensure safe and efficient operation. Contact your Service engineer for further details.

9 Failure of electricity supply - If the electricity

supply fails, the boiler will not operate. It should relight automatically when the supply is restored. Note: The time on the internal 7-day or 24-hour timer may need to be reset after a power failure.

The boiler requires a 230/240 V ~ 50 Hz supply. It must be protected by a 5 Amp fuse.

Warning: This appliance must be earthed.

The section of any worktop (if fitted) above the boiler must be removable to provide access for servicing for the Combi 70 V3 and Vortex Combi 36.

The Combi 90 V3, Combi Max and Vortex Combi 26 boilers can be serviced from the front, but it is preferable for any worktop above the boiler to be removable to provide the best access for servicing.

General notes and care of your system

3.6

3 - COMBI V3, COMBI MAX and VORTEX COMBI USER INSTRUCTIONS

Electricity supply

3.7

Important

3.8

Combi V3, Combi Max and Vortex Combi models

22 mm copper pipe

15 mm copper pipe

15 mm copper pipe **

15 mm copper pipe

100 mm (4 in) diameter

26.5 mbar

9.5 mbar

75 to 85°C

111°C ± 3°C

1.0 bar

0.5 bar

2.5 bar

12 litres (pre-charged at 1.0 bar)

2.5 bar

3.0 litres/min (0.66 gal/min)

65°C (factory set)

8.0 bar

2.5 bar

Less than 50°C

230/240 V ~ 50 Hz Fused at 5 Amp

90 W max.

2.60 Amp

0.85 Amp

¼" BSP Male (on end of flexible fuel line)

Minimum flue draught - 8.7 N/m² (0.035 in wg)

Maximum flue draught - 37 N/m² (0.15 in wg)

* Weight includes burner but excludes flue ** 22 mm hot water pipe can be connected to the Combi Max if required. *** Based on expansion vessel charge and initial cold system pressure of 0.5 bar.

Boiler technical data - Combi V3 and Combi Max boilers

4.1

Model

Boiler water content litre

gal

* Weight (dry) kg

Max. heat input (Kerosene) kW

Btu/h

Connections: Heating flow and return

Cold water mains inlet

Domestic hot water outlet

Pressure relief valve discharge

Flue size (conventional)

Waterside resistance Flow/Return temp. diff. of 10°C

Waterside resistance Flow/Return temp. diff. of 20°C

Boiler thermostat range

Limit (safety) thermostat switch off temp.

Maximum heating system pressure (cold)

Minimum heating system pressure (cold)

Pressure relief valve

Expansion vessel

Maximum heating system volume ***

Maximum operating pressure

Minimum domestic hot water flow rate

Maximum domestic hot water temperature

Maximum mains water inlet pressure

Minimum recommended mains water inlet pressure

Max. hearth temperature

Electricity supply

Motor power

Starting current

Running current

Oil connection

Conventional flue

Combi 70 V3

17.6

158

348

22.0

75 000

Combi Max

8.8

159

350

36.8

125 500

Combi 90 V3

8.8

158

348

27.6

94 200

128 litres

4 - BOILER TECHNICAL INFORMATION

Combi V3, Combi Max and Vortex Combi models

15 mm copper pipe

22 mm plastic pipe

100 mm (4 in) diameter

65 to 80°C

111°C +0 -3°C

1.0 bar

0.5 bar

2.5 bar

3.0 litres/min (0.66 gal/min)

65°C (factory set)

8.0 bar

2.5 bar

Less than 50°C

230/240 V ~ 50 Hz Fused at 5 Amp

90 W max.

2.60 Amp

0.85 Amp

¼" BSP Male (on end of flexible fuel line)

Minimum flue draught - 8.7 N/m² (0.035 in wg)

Maximum flue draught - 37 N/m² (0.15 in wg)

4 - BOILER TECHNICAL INFORMATION

* Weight includes burner but excludes flue ** Based on expansion vessel charge and initial cold system pressure of 0.5 bar

Boiler technical data - Vortex Combi boilers

4.2

Model

Boiler water content litre

(including 32.5 litre primary store) gal

* Weight (dry) kg

Max. heat input (Kerosene) kW

Btu/h

Connections: Heating flow and return

Cold water mains inlet

Domestic hot water outlet

Pressure relief valve discharge

Condensate connection

Flue size (conventional)

Waterside resistance Flow/Return temp. diff. of 10°C

Waterside resistance Flow/Return temp. diff. of 20°C

Boiler thermostat range

Limit (safety) thermostat switch off temp.

Maximum heating system pressure (cold)

Minimum heating system pressure (cold)

Pressure relief valve

Expansion vessel (pre-charged at 1 bar)

Maximum heating system volume**

Maximum operating pressure

Minimum domestic hot water flow rate

Maximum domestic hot water temperature

Maximum mains water inlet pressure

Minimum recommended mains water inlet pressure

Max. hearth temperature

Electricity supply

Motor power

Starting current

Running current

Oil connection

Conventional flue

Vortex Combi 26

48.5

10.7

188

415

88 700

22 mm copper pipe

15 mm copper pipe

28.5 mbar

10.0 mbar

12 litres

128 litres

Vortex Combi 36

53.5

11.8

218

481

123 000

28 mm copper pipe

22 mm copper pipe

26.0 mbar

9.5 mbar

14 litres

148 litres

Combi V3, Combi Max and Vortex Combi models

Note: All boilers are despatched for use with kerosene.

Notes:

1 The data given above is approximate only. The Kerosene table is based on the boiler being used with a low level balanced flue.

2 The above settings may have to be adjusted on site for the correct operation of the burner.

3 Gas Oil is not suitable for use with a low level balanced flue, unless the flue terminal is higher than 2.0 m above outside

ground level.

4 The installer must amend the boiler data label if the type of fuel and nozzle used are changed.

5 Net flue gas temperatures given are ± 10%.

6 ** Net thermal efficiency (BSRIA).

7 Flue gas temperatures taken at combustion door test point will be approximately 25°C higher for the Combi 90 V3 and

Combi Max.

8 Flue gas temperature taken at the top of the boiler will be 20°C higher for the Combi 70 V3.

(%)

12.0

(kW)

33.3

(Btu/h)

113 600

Heat Output

(kW)

36.8

(Btu/h)

125 500

Net Heat Input

Net eff. **

(%)

91.5

Head

type

Nozzle

size

1.00/80°EH

Oil press.

(bar)

9.0

Smoke

No.

0 - 1

Fuel flow

rate (kg/h)

3.10

Net flue gas

temp. (°C)

190

Note: Burners are supplied factory set at the outputs shown. When commissioning, or when the type of fuel is changed, the air damper must be adjusted to obtain the correct CO

level and the Installer must amend the data label.

4 - BOILER TECHNICAL INFORMATION

Combi V3 and Combi Max oil boilers using class C2 kerosene

4.3

Combi V3 and Combi Max oil boilers using class D gas oil

4.4

Approximate air damper settings

4.5

(kW)

32.9

(Btu/h)

112 463

Heat Output

(kW)

36.0

(Btu/h)

122 910

Net Heat Input

Net eff. **

(%)

91.5

Head

type

Nozzle

size

0.75/80°S

Oil press.

(bar)

11.0

Smoke

No.

0 - 1

Net flue gas

temp. (°C)

200

Fuel flow

rate (kg/h)

3.02

Flue gas mass

flow rate (kg/h)

34.8

38.7

(%)

11.5

12.0

(kW)

20.5

26.4

(Btu/h)

70 000

90 000

Heat Output

(kW)

22.5

27.6

(Btu/h)

76 900

94 200

Net Heat Input

Net eff. **

(%)

93.0

95.8

Head

type

LD2SX short

LD3

Nozzle

size

0.60/60°EH

0.75/60°EH

Oil press.

(bar)

8.5

9.5

Smoke

No.

0 - 1

Fuel flow

rate (kg/h)

1.87

2.40

Net flue gas

temp. (°C)

211

180

Combi 70 V3 and Combi 90 V3 (Riello RDB1 burner)

Flue gas mass

flow rate (kg/h)

34.8

38.7

(%)

11.5

12.0

(kW)

20.5

26.4

(Btu/h)

70 000

90 000

Heat Output

(kW)

22.5

27.9

(Btu/h)

76 900

95 250

Net Heat Input

Net eff. **

(%)

92.0

94.6

Head

type

LD2SX short

LD3

Nozzle

size

0.40/60°S

0.60/60°S

Oil press.

(bar)

12.0

Smoke

No.

0 - 1

Fuel flow

rate (kg/h)

1.60

1.97

Net flue gas

temp. (°C)

200

Combi Max (Riello RDB2.2 burner)

Combi 70 V3 and Combi 90 V3 (Riello RDB1 burner)

Combi Max (Riello RDB2.2 burner)

Flue gas mass

flow rate (kg/h)

51.5

(%)

12.0

Flue gas mass

flow rate (kg/h)

51.5

Combi V3, Combi Max and Vortex Combi models

4 - BOILER TECHNICAL INFORMATION

Notes:

1 The data given above is approximate only and is based on the boiler being used with a low level balanced flue. 2 The above settings may have to be adjusted on site for the correct operation of the burner. 3 Gas Oil is not suitable for use with a Grant Vortex Combi boiler. 4 * Net thermal efficiency. 5 The net flue gas temperatures given above are ± 10%. 6 When commissioning the air damper must be adjusted to obtain the correct CO2 level. 7 The combustion door test point may be used for CO2 and smoke readings only. Do not use this test point for temperature

or efficiency readings.

Flue gas analysis

To allow the boiler to be commissioned and serviced, the boiler is supplied with a combustion test point on the front cleaning door. When this test point is used please note the following:

1. The test point is for CO2 and smoke readings only.

2. The boiler efficiency and temperature must be taken from the flue test point on high level, vertical and conventional flue adaptors.

3. Concentric low level flues do not contain a test point. The temperature and efficiency readings must be taken from the flue terminal.

Note: Vortex Combi boilers are only for use with kerosene.

Vortex Combi oil boilers using Class C2 kerosene

4.6

(kW)

26.0

36.0

(Btu/h)

88 700

123 000

101.0

101.5

Nozzle

0.75/80°EH

1.00/80°EH

Oil

press.

(bar)

8.0

9.1

Smoke

No.

0 - 1

Fuel flow

rate

(kg/h)

2.16

3.01

Flue gas

temp.

(°C)

75 - 80

(%)

12.0

Burner

head

Heat Output

Net

eff *

(%)

Model

Burner

type

Riello RDB1

Riello RDB2.1

Combi V3, Combi Max and Vortex Combi models

Fig. 2

Water schematic of boiler - Combi V3 and Combi Max

4.8

Mains

inlet

water

Domestic

hot

water out

Blending

valve

Flow

switch

3-way

diverter

valve

Domestic hot water

heat exchanger

Pump

Automatic

air vent

Boiler

Heating

return

Heating

flow

Expansion

vessel

Primary

store

Pressure

relief valve

Drain

cock

Pressure

switch

Check

valve

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.

4 - BOILER TECHNICAL INFORMATION

Boiler dimensions - Combi V3 and Combi Max

4.7

Combi V3, Combi Max and Vortex Combi models

4 - BOILER TECHNICAL INFORMATION

Fig. 3a - Vortex Combi 36 dimensions

Fig. 3 - Vortex Combi 26 dimensions

Boiler dimensions - Vortex Combi

4.9

Combi V3, Combi Max and Vortex Combi models

4 - BOILER TECHNICAL INFORMATION

Fig. 4

Water schematic of boiler - Vortex Combi

4.10

Combi V3, Combi Max and Vortex Combi models

White system ...... High level concentric balanced flue

kit - components available:

Extensions 225 mm, 450 mm, 950 mm and adjustable 275 to 450 mm 45° elbow Vertical concentric balanced flue kit Extensions 225 mm, 450 mm, 950 mm and adjustable 275 to 450 mm 45° elbow

The Combi V3 and Combi Max boilers are supplied ready for use with Class C2 kerosene. If required, they can easily be adapted for use with Class D gas oil.

Note: Only Kerosene may be used with a low level balanced flue, unless the flue terminal is higher than

2.0 m above outside ground level.

If the fuel to be used is Gas Oil, it will be necessary to change the burner nozzle. Refer to the Technical Information in Section 4.3. To change the nozzle, remove the burner from the boiler then remove the nozzle as described in Section 10.4. The installer must amend the boiler data label accordingly.

The Vortex Combi boilers are only suitable for use with Kerosene.

All burners are ready to connect to a single pipe system

with a loose flexible fuel line (600 mm) and

/8" to 1/4" BSP male adaptor supplied with the boiler. If required, an additional flexible fuel line (600 mm) and 3/8" to 1/4" BSP male adaptor are available to purchase from Grant Engineering (UK) Limited, for two-pipe oil supply system, Part No. RBS104.

The temperature of the water leaving the boiler to heat the radiators is User adjustable.

To achieve the optimum hot water performance from the Combi V3 and Combi Max, the boiler thermostat should be set to maximum.

The setting of the boiler thermostat on the Vortex Combi has no effect on the hot water performance.

The control panel is fitted with an ON/OFF switch, boiler thermostat control knob and the manual reset button for the overheat thermostat. An optional plug-in programmer is available which allows the User to set the operating times for central heating and hot water. Alternatively, an external timer, located remotely from the boiler in a convenient position for the user, may be connected to the boiler for this purpose - the Grant TCR kit, Part No. TCRKIT is ideal. Refer to Section 12 Wiring diagrams. A programmable electronic room thermostat, Part No. RSKIT is also available to purchase from Grant UK.

Domestic hot water is available at all times, provided the boiler is switched on.

The Combi and Vortex Combi boilers are automatic pressure jet oil boilers designed for use with a sealed central heating system and will provide domestic hot water at mains pressure.

All boilers are supplied with the control panel and burner factory fitted.

All boilers can be connected to either a conventional flue system or a balanced flue system, as required.

The Combi V3 and Combi Max boilers are supplied ready to connect to a conventional flue. If the boiler is to be used with a balanced flue, a Balanced Flue Kit is required.

The Vortex Combi boilers are not supplied with a flue adaptor. If a conventional flue is to be used, a Grant conventional flue adaptor (Ref. CFCA1546) must be ordered.

For conventional flue applications, Grant recommends the use of the Grant 'Orange' flue system, specifically designed for the Vortex condensing boiler. Refer to Section 5.8 for further details.

Fitting instructions for the Low level concentric, High level and Vertical balanced flue kits are supplied with the kits. Where a balanced flue system is required, the following flue kits are available from Grant UK. Refer to Section 5.8 for further details.

Yellow system..... Standard low level concentric

balanced flue - components available:

Low level concentric balanced flue short Extensions 225 mm, 450 mm and 675 mm 90° extension elbow 45° extension elbow 45° elbow

Green system ...... Standard external high level/

vertical flue starter kit (room sealed) - components available:

External high level/vertical flue starter kit short (room sealed) Extensions 150 mm, 250 mm, 450 mm, 950 mm and adjustable 195 to 270 mm 45° elbow High level terminal Vertical terminal

5 - GENERAL BOILER INFORMATION

Boiler description

5.1

Combi V3, Combi Max and Vortex Combi models

Installation of a Grant Combi boiler must be in accordance with the following recommendations:-

a Building Regulations for England and Wales,

and the Building Standards for Scotland issued by the Department of the Environment and any local Byelaws etc.

b Model and local Water Undertaking Byelaws.

c Applicable Control of Pollution Regulations.

d The following OFTEC requirements:-

OFS T100 Polythene oil storage tanks for

distillate fuels.

OFS T200 Fuel oil storage tanks and tank

bunds for use with distillate fuels, lubrication oils and waste oils.

Further information may be obtained from the OFTEC Technical Information Book 3 (Installation requirements for oil fired boilers and oil storage tanks).

The installation should also be in accordance with the latest edition of the following British Standard Codes of Practice:-

BS 715 Metal flue pipes, fittings, terminals

and accessories. BS 799:5 Oil storage tanks. BS 1181 Clay flue linings and flue terminals. BS 4543:3 Factory made insulated chimneys for

oil fired appliances. BS 4876 Performance requirements for oil

burning appliances. BS 5410:1 Code of Practice for oil firing appliances. BS 5449 Forced circulation hot water systems. BS 7593 Code of Practice for treatment of

water in heating systems. BS 7671 Requirements for electrical

installations, IEE Wiring Regulations.

Failure to install and commission appliances correctly may invalidate the boiler warranty.

Regulations to comply with

5.2

5 - GENERAL BOILER INFORMATION

IMPORTANT

Before starting any work on the boiler, or fuel supply please read the health and safety information given in Section 15 on page 61.

Regional statutory requirements may deem this appliance to be a 'controlled service'. Where this is the case, it is a legal requirement that the appliance is installed and commissioned either under the remit of building control or by a 'Competent person' such as a suitably qualified Oftec registered technician.

5.3.1 Fuel storage

The tank should be positioned in accordance with the recommendations given in BS 5410:1:1997, which gives details of filling, maintenance and protection from fire.

A galvanised tank must not be used.

A plastic tank may be used and must comply with OFS T100.

Note: Plastic tanks should be adequately and uniformly supported on a smooth level surface, across their entire base area.

5.3.2 Fuel pipes

1 Fuel supply pipes should be of copper tubing with

an internal diameter of at least 8 mm. Galvanised pipe must not be used.

2 Flexible pipes must not be used outside the boiler

case.

3 A remote sensing fire valve must be installed in the

fuel supply line (outside) where it enters the building. Recommendations are given in BS 5410:1:1997.

4 A metal bowl type filter with a replaceable micronic

filter must be fitted in the fuel supply line. A shut-off valve should be fitted before the filter, to allow the filter to be serviced.

5 A flexible fuel line, adaptor and 1/4" BSP isolation

valve are supplied loose with the boiler for the final connection to the burner. If a two pipe system or Tiger Loop system is used, an additional flexible fuel line (600 mm) and 3/8" to 1/4" BSP male adaptor are available from Grant Engineering (UK) Limited (Part No. RBS104).

Fuel supply

5.3

Combi V3, Combi Max and Vortex Combi models

5 - GENERAL BOILER INFORMATION

6 The flexible fuel lines supplied should be inspected

annually when the boiler is serviced and replaced at least every two years.

5.3.3 Single pipe system - (See Fig. 5)

1 Where the storage tank outlet is above the burner

the single pipe system should be used. The height of the tank above the burner limits the length of pipe run from the tank to the burner.

2 As supplied the burner is suitable for a single pipe

system.

5.3.4 Two pipe system - (See Fig. 6)

1 When the storage tank outlet is below the burner, the

two pipe system should be used. The pipe runs should be as shown in Fig. 5. The return pipe should be at the same level in the tank as the supply pipe, both being 75 to 100 mm above the base of the tank. The pipe ends should be a sufficient distance apart so as to prevent any sediment disturbed by the return entering the supply pipe.

2 Avoid the bottom of the tank being more than 3 m

below the burner.

3 A non-return valve should be fitted in the supply pipe

together with the filter and fire valve. A non-return valve should be fitted in the return pipe if the top of the tank is above the burner.

4 To be used with a two-pipe system, the burner

must be fitted with an additional flexible fuel line (a flexible fuel line (600 mm) and 3/8" to 1/4" BSP male adaptor are available from Grant Engineering (UK) Limited - Part No. RBS104). See Section 5.3.6.

5 The pump vacuum should not exceed 0.4 bar.

Beyond this limit gas is released from the oil. A vacuum gauge must be fitted to the fuel pump to check the vacuum reading.

For guidance on installation of top outlet fuel tanks and suction oil supply sizing, see OFTEC booklet T1/139. Available at www.oftec.org.uk

Fig. 5 - Single pipe system

Combi V3, Combi Max and Vortex Combi models

5.3.5 Tiger Loop system - (See Figs. 7 and 8)

1 When the storage tank is below the burner, an

alternative to a two pipe system can be achieved using the Tiger Loop oil deaerator. This effectively removes the air from the oil supply on a single pipe lift.

2 The Tiger Loop is connected close to the boiler as

a two pipe system (omitting the non-return valve) as shown in Fig. 7. Refer to the manufacturers instructions supplied with the Tiger Loop. The Tiger Loop must be mounted vertically.

5 - GENERAL BOILER INFORMATION

Note: To prevent any possibility of fuel fumes entering the building, the Tiger Loop must be fitted outside.

3 To be used with a Tiger Loop system, the burner

must be fitted with an additional flexible fuel line (a flexible fuel line (600 mm) and 3/8" to 1/4" BSP male adaptor are available to purchase from Grant Engineering (UK) Limited - Part No. RBS104). See Section 5.3.6.

Fig. 6 - Two pipe system

Fig. 7 - Tiger loop system

Combi V3, Combi Max and Vortex Combi models

5 - GENERAL BOILER INFORMATION

5.3.6 Two pipe oil supplies

See Fig. 9

1 The fuel pump is supplied for use with a single

pipe fuel supply system. For use on a two pipe system, it is necessary to fit the By-pass screw (see Fig. 9) into the tapping in the return port.

2 The By-pass screw is supplied in the boiler

accessory pack.

3 Remove the plastic burner cover (two screws).

4 Remove and discard the blanking plug from the

return connection of the pump and fit the By-pass screw using an hexagonal key.

5 Connect the return oil flexible fuel line to the pump.

6 Connect the 3/8" to 1/4" BSP adaptor to the flexible

fuel line.

7 Flexible fuel lines and adaptors are available to

purchase from Grant Engineering (UK) Ltd.

8 The burner cover may be left off until the boiler is

commissioned.

1/4" BSP female

connections

Tiger Loop

SUPPLY

TO PUMP

RETURN

FROM PUMP

SUPPLY

FROM TANK

Fig. 8 - Tiger loop

Fig. 9 - RDB pump

1 Oil inlet connection 2 Return connection 3 By-pass screw 4 Pressure gauge connection

5 Pressure adjuster 6 Vacuum gauge connection 7 Solenoid 8 Supply to nozzle

Combi V3, Combi Max and Vortex Combi models

Air supply

5.5

Electricity supply

5.4

1 A 230/240 V ~ 50 Hz mains supply is required.

The boiler must be earthed.

2 The supply must be fused at 5 Amp and there must

only be one common isolator for the boiler and control system, and it must provide complete electrical isolation.

3 A fused double pole switch or a fused three pin

plug and shuttered outlet socket should be used for the connection.

4 The power supply cable should be at least 0.75 mm²

PVC as specified in BS 6500, Table 16.

5 All the wiring external to the boiler must be in

accordance with the current I.E.E. Wiring Regulations.

6 Any room thermostat or frost thermostat used must

be suitable for use on mains voltage.

7 The boiler requires a permanent mains supply, do

not interrupt it with any external time control.

8 In the event of an electrical fault after installation

of the boiler, the following electrical system checks must be carried out:- Short circuit, Polarity, Earth continuity and Resistance to earth.

5 - GENERAL BOILER INFORMATION

See Figs. 10 and 11

A sufficient permanent air supply to the boiler should be provided:

a For proper combustion of fuel and effective

discharge of combustion products to the open air.

b For the ventilation of any confined space in

which the boiler is installed to prevent overheating of the boiler any equipment in and near the boiler.

c For the satisfactory operation of any draught

stabiliser which may be fitted.

It should be both the designer's and installer's concern that the air required for these functions be introduced so as to cause as little discomfort as possible to the building occupants and thus to offer them the least temptation to obstruct the ventilators.

Further details may be obtained from BS 5410:1:1997.

Notes:

For a boiler fitted in a compartment, which is ventilated as shown, no additional allowance is necessary.

Open flue - Extract fans, where needed, should be in accordance with Section 4.4.7 in BS 5410 Part 1 1997.

Fig. 10 - Air supply for room sealed balanced flue boilers

+ 44 hidden pages

Grant Combi 70 V3, Combi Max, Vortex Combi 26, Vortex Combi 36 User's Installation Manual

Specifications and Main Features

Frequently Asked Questions

User Manual