Grant Vortex 15/26, Vortex 46/58, Vortex 26/36, Vortex 36/46, Vortex 58/70 User, Installation And Servicing Instructions

USER, INSTALLATION

and

SERVICING INSTRUCTIONS

GRANT VORTEX

Condensing Oil Boiler range

For use with Kerosene only

Part No. DOC 37 Rev. 12 September 2006

Kitchen, Kitchen System,

Utility and Utility System Models

with outputs up to 70 kW

Utility model

Kitchen model

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

2

Grant Vortex Oil Boilers

Subject PageSection

1 Introduction.............................................. 3

2 User instructions ...................................... 4

3 Boiler technical information .................... 7

4 General boiler information....................... 11

5 Boiler installation..................................... 28

6 Commissioning......................................... 34

7 Information for the user ........................... 36

8 Boiler servicing ........................................ 36

9 Wiring diagrams....................................... 40

10 Fault finding ............................................. 43

11 Burner spares ........................................... 45

12 Health and safety information.................. 47

13 EC declaration of conformity .................. 48

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

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

Boiler model/output: ........................................ kW Fuel type: Kerosene

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.

COMMISSIONING REPORT

SERVICE LOG

LIST OF CONTENTS

3

Grant Vortex Oil Boilers

During the combustion process, hydrogen and oxygen
combine to produce heat and water vapour. The water
vapour produced is in the form of superheated steam in
the heat exchanger. This superheated steam contains
sensible heat (available heat) and latent heat (heat
locked up in the flue gas). A conventional boiler
cannot recover any of the latent heat and this energy is
lost to the atmosphere through the flue.

The Grant Vortex condensing boiler contains an extra
heat exchanger which is designed to recover the latent
heat normally lost by a conventional boiler. It does this
by cooling the flue gases to below 90° C, thus
extracting more sensible heat and some of the latent
heat. This is achieved by cooling the flue gases to their
dew point (approximately 55° C).

To ensure maximum efficiency, the boiler return
temperature should be 55° C or less, this will enable
the latent heat to be condensed out of the flue gases.
The boiler will achieve nett thermal efficiencies of
100%.

To achieve maximum performance from the Grant
Vortex boiler, it is recommended that the heating
system is designed so that a temperature differential of
20° C between the flow and return is maintained. The
use of modulating circulating pumps (now widely
available) and effective control systems should be
considered.

The Grant Vortex boiler will however still operate at
extremely high efficiencies even when it is not in
condensing mode and therefore is suitable for fitting to
an existing heating system without alteration to the
radiator sizes. The boiler is capable of a maximum
flow temperature of 75° C.

How a condensing boiler works

1.1

Heating system design considerations

1.2

To achieve the maximum efficiencies possible from
the Grant Vortex boiler, the heating system should be
designed to the following parameters:

Radiators:-

Flow temperature 70° C
Return temperature 50° C
Differential 20° C

Underfloor:-

Flow temperature 50° C
Return temperature 40° C
Differential 10° C

1 Size radiators with a mean water temperature of

60° C.

2 Design system controls with programmable room

thermostats or use weather compensating controls
to maintain return temperatures below 55° C.

The boiler should not be allowed to operate with
return temperatures of less than 40° C when the
system is up to operating temperature.

3 The use of a pipe stat is recommended to control

the return temperature when using weather
compensating controls.

1 - INTRODUCTION

4

Grant Vortex Oil Boilers

2 - USER INSTRUCTIONS

The boiler will provide domestic hot water and central
heating and is fully automatic once switched on. Kitchen
models have a 'mains on' neon, see Fig. A, which lights
when the boiler is switched on, but does not necessarily
indicate the burner is firing.

If your model has a programmer fitted, it will provide
hot water and central heating during the periods set on
the programmer.

Kitchen and Kitchen System: To access the controls,
open the front door from the right (may be altered to
open from the left if required).

Utility and Utility System: Pull off the front access
panel.

Fig. A Boiler controls (Kitchen model shown)

About your boiler

2.1

Boiler controls (see Fig. A)

2.2

1 Ensure that - There is sufficient fuel, of the correct

type, 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 room thermostat (if fitted) is at the desired
setting. The boiler thermostat is set to the required

setting (see Section 2.7).
2 Switch on the electricity supply to the boiler.
3 Set the On/Off switch to ON and, if fitted, the

programmer (CH or HW) to ON.

The boiler will now light automatically.
4 If you have a programmer fitted in the control panel,

refer to the instructions supplied with the programmer

and set the programmer. Set the HW and CH functions

to TIMED. The boiler will now operate during the 'on'

periods set on the programmer.

Lighting your boiler (see Fig. A)

2.3

5

Grant Vortex Oil Boilers

For short periods - Set the On/Off 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 given
in Section 2.3.

1 Check that the boiler On/Off switch is ON.
2 Check that the programmer (if fitted) 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 (on the

burner) 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.
Check that the fire valve in the oil supply line has not
tripped

5 Ensure that a fuse has not blown or that the

electricity supply has not failed.

6 Check to see if the safety thermostat has operated

(see Section 2.7).

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.

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

You should always quote this type of fuel when ordering
from your supplier.

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.

2 - USER INSTRUCTIONS

1 Boiler thermostat - This control allows the

temperature of the water leaving the boiler to heat
the radiators and domestic hot water to be adjusted.

Note: If you have a cylinder thermostat on your hot
water cylinder, this will control the temperature of
your domestic hot water. The boiler thermostat
setting must be equal to or above the cylinder
thermostat setting to enable the cylinder thermostat
to control the domestic hot water system.

2 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 (on the burner) will light. On Kitchen
models a neon on the control panel also indicates a
burner lock-out (see Fig. A). 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.

3 Safety 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. On Kitchen models a neon on
the control panel will illuminate to indicate the overheat
thermostat has operated (see Fig. A).

If your boiler goes off and you try to light it but
nothing happens and the 'Lock-out' reset button on the
burner (or the neon on the control panel) are 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), press
the button then replace the cap.

If this condition continually repeats, contact your
Service engineer.

4 Programmer (if fitted) - Refer to the instructions

supplied with the Programmer.

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.

Turning off your boiler (see Fig. A)

2.4

Points to check if burner fails to light

2.5

About your fuel

2.6

General notes and care of your system

2.7

6

Grant Vortex Oil Boilers

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 must 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.

If a programmer is fitted it will retain the time
settings for up to 24 hours and will not have to be
reset to the correct time of day when the supply is
restored (the display remains for up to 1 hour, but
will re-appear when the supply is restored).

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.

If your boiler is operating on a sealed heating system,
the installer will have pressurised the system and
should have told you (or set it on the pressure gauge)
the system pressure when cold (this is normally
between 0.5 and 1.0 bar, which will increase slightly
when hot). If the pressure (when cold) is below the set
pressure mentioned above, you can re-pressurise the
system. If the system requires frequent re-pressurising,
ask your Installer or Service engineer to check the
heating system for leaks and to check the expansion
vessel air charge.

2 - USER INSTRUCTIONS

The boiler or system will be fitted with an automatic air
vent to remove air from the system. Any air trapped in the
radiators should be removed by venting the radiators
using the vent screw at the top of each radiator. 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. Re-pressurise the system if necessary.

The boiler or system may be 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.

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 (see Fig. B) 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.

When the black needle of the pressure gauge is

between 0.5 and 1 bar, close the valve.
4 Vent each radiator in turn, starting with the lowest

one in the system, to remove air.
5 Continue to fill the system until the pressure gauge

indicates between 0.5 and 1.0 bar. Close the fill

point valve.
6 Repeat steps 4 and 5 as required.
7 Close the valves either side of the filling loop and

disconnect the loop.

Electricity supply

2.8

Sealed central heating system

2.9

Sealed system filling loop arrangement - Fig. B

7

Grant Vortex Oil Boilers

22 mm (only connect plastic pipe)

28 m

1m

65 to 80° C

111° C ± 3° C

Less than 50° C

230/240 V ~ 50 Hz Fused at 5 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)

2.5 bar

2.5 bar

Boiler technical data

3.1

3- BOILER TECHNICAL INFORMATION

Model

Water content litre

gal

* Weight (dry) kg

lb
Max. heat output kW
(kerosene) Btu/h
Flow connection
Return connection
Min. flow rate (ΔT=10°C) l/h
Min. flow rate (ΔT=20°C) l/h
Condensate connection
Flue diameter (conventional)
Waterside resistance
Flow/Return temp. diff. of 10°C
Flow/Return temp. diff. of 20°C
Maximum static head
Minimum circulating head
Boiler thermostat range
Limit (safety) stat shut off temp
Max. hearth temperature
Electricity supply
Motor power Watts
Starting current Amps
Running current Amps
Oil connection
Conventional flue

Max operating press - sealed sys
Max operating press - open sys

* Weight includes burner but excludes flue.
** 125 mm diameter required for flexible flue liner (Orange system). For rigid flue system (e.g. Green system) 100 mm

diameter flue required. Refer to Sections 4.1 and 4.7 for further details.

Kitchen System

Utility Utility System

IMPORTANT: On all models except 46/58 and 58/70 Return connections are stainless steel pipe (see above for size).
Compression fitting MUST be used. Brass push-fit connectors are not suitable for use on stainless steel pipe.

Kitchen

90

2.6

0.85

90

4.2

0.85

90

2.6

0.85

150

6.4

1.2

15/26

19

4.2
119
262

26
88 700
22 mm
22 mm

2 200
1 100

15/26

19

4.2
127
280

26
88 700
22 mm
22 mm

2 200
1 100

15/26

19

4.2
112
246

26
88 700
22 mm
22 mm

2 200
1 100

26/36

21

4.7
134
295

36

122 840

28 mm
28 mm

3 000
1 500

36/46

21

4.7
134
295

46

157 000

28 mm
28 mm

4 000
2 000

46/58

50

11
295
649

58

197 896
1¼" BSP
1¼" BSP

5 200
2 600

58/70

50

11
299
658

70

238 840
1¼" BSP
1¼" BSP

6 000
3 000

90

4.2

0.85

26.0 mbar

9.5 mbar

28.5 mbar

10.0 mbar

100 mm (4 in) 100 mm (4 in)

26.0 mbar

9.5 mbar

125 mm (5 in)**

15/26

19

4.2

126.5
278

26
88 700
22 mm
22 mm

2 200
1 100

28.5mbar

10.0mbar

26/36

21

4.7
142
312

36

122 840

28 mm
28 mm

3 000
1 500

36/46

21

4.7
142
312

46

157 000

28 mm
28 mm

4 000
2 000

8

Grant Vortex Oil Boilers

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 the Grant Vortex boiler range.
4 When commissioning the air damper must be adjusted to obtain the correct CO

2

level.
5 * Factory settings.
6 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 CO

2

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.

3 - BOILER TECHNICAL INFORMATION

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

Grant Vortex oil boilers using Class C2 kerosene

3.3

(kW)

15.0

20.0

23.0

26.0

26.0

31.5

36.0

36.0

41.5

46.0

46.0

52.0

58.0

58.0

64.0

70.0

(Btu/h)

51 180
68 240
78 475
88 700

88 700
107 500
123 000
123 000
142 000
157 000
156 952
177 424
197 896
197 896
218 368
238 840

Nozzle

0.50/80°EH

0.60/80°EH

0.65/80°EH

0.75/80°EH

0.75/80°EH

0.85/80°EH

1.00/80°EH

1.00/80°EH

1.20/80°S

1.25/80°S

1.25/80°S

1.35/80°S

1.65/80°S

1.65/80°S

1.65/80°S

1.75/80°S

Oil

press.

(bar)

7.0

8.0

8.5

8.0

8.0

9.0

9.1

9.0

8.0

8.0

8.0

9.5

8.0

8.0

9.5

9.5

Smoke

No.

0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1

Fuel flow

rate

(kg/h)

1.25

1.67

1.94

2.16

2.18

2.57

3.01

3.01

3.56

3.90

4.01

4.47

5.05

5.05

5.58

6.01

Flue gas

temp.

(° C)

60 - 65
65 - 70
70 - 75
75 - 80
65 - 70
70 - 75
75 - 80
75 - 80
80 - 85
85 - 90
75 - 80
75 - 80
75 - 80
75 - 80
75 - 80
75 - 80

CO

2

(%)

12.0

12.0

12.0

12.0

12.0

12.0

12.0

12.0

12.0

12.0

12.0

12.0

12.0

12.0

12.0

12.0

Burner

head type

T1
T1
T2
T2
T3
T3
T3
T5
T5

T5
GIB
GIB
GIB
GIB
GIB
GIB

Heat Output

15/26

Riello RDB1

26/36

Riello RDB2

36/46

Riello RDB2.2

46/58

Riello RDB3.2

58/70

Riello RDB3.2

Model and

burner type

*

*

Sealed system data - System models (not 46/58 and 58/70)

3.2

*

Heating system pressure (cold)
Operating pressure of pressure relief valve
Expansion vessel size (15/26)
Expansion vessel size (26/36)
Expansion vessel size (36/46)
Max heating system volume (including boiler) (15/26)*
Max heating system volume (including boiler) (26/36)*
Max heating system volume (including boiler) (36/46)*
Cold water mains connection
Pressure relief valve discharge connection

Maximum 1.0 bar, Minimum 0.5 bar

2.5 bar
10 litres (pre-charged at 1 bar)
12 litres (pre-charged at 1 bar)
16 litres (pre-charged at 1 bar)

106 litres (approximately)
128 litres (approximately)
170 litres (approximately)

15 mm copper pipe
15 mm copper pipe

* Based on vessel charge and system cold fill pressure of 0.5 bar

*

*

SEDBUK
efficiency

(%)

95.0

97.0

92.6

94.1

93.6

Burner

head setting

Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed

0
0
0
0
0
4

9

Grant Vortex Oil Boilers

FRONT VIEW

470

860

LEFT SIDE VIEW

813

759

709

487

587

352

18

17

110

30

Flue centre line

RIGHT SIDE VIEW

631

59

PLAN VIEW

470

603

110

22mm condensate drain

Safety valve
Cold fill
Flow - 22mm push-fit

22mm stainless
return

170

Flue
spigot

3 - BOILER TECHNICAL INFORMATION

Boiler dimensions

3.4

Fig 1a - Kitchen and Kitchen System 15/26 dimensions

Fig. 1b - Utility and Utility System 15/26 dimensions

10

Grant Vortex Oil Boilers

3 - BOILER TECHNICAL INFORMATION

Fig. 1c - Utility and Utility System 26/36 and 36/46 dimensions

Fig. 1d - Utility 46/58 and 58/70 dimensions

Safety valve
Flow - 28mm push-fit
Cold fill

61

170

61

LEFT SIDE VIEW

455

555

599

311

24

115

63

63

Flue centre line

RIGHT SIDE VIEW

PLAN VIEW

470

603

150

22mm condensate drain

FRONT VIEW

470

900

28mm stainless
return

205

Flue
spigot

170

LEFT SIDE VIEW

731

831

1024

25

30

44 Dia.

44 Dia.

109

250

Flue centre line

RIGHT SIDE VIEW

PLAN VIEW

563

786

109

22mm condensate drain

FRONT VIEW

563

1234

225

Flue
spigot

Note: Cover plate on
each side slides
forwards to provide
opening for pipes.

11

Grant Vortex Oil Boilers

4 - GENERAL BOILER INFORMATION

Boiler description

4.1

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

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

All burners are pre-set for use with kerosene and are
supplied ready to connect to a single pipe fuel supply
system with a loose flexible fuel line and 3/8" 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 systems, Part No. RBS104.

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

The boiler is fitted with an overheat thermostat (which
allows it to be used on a sealed central heating system) which
will automatically switch off the boiler if the heat exchanger
exceeds a pre-set temperature of 111° C ± 3° C.

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 to purchase from Grant
Engineering (UK) Limited for Kitchen models which
allows the User to set the operating times for central
heating and hot water, Part No. EPKIT.

Kitchen and Kitchen System: The boiler casing door is
factory fitted with the hinges on the left hand side. If
required, the door may be hinged on the right hand
side as follows:­Remove the hinge pin from the top of the door and the
bottom hinge bracket. Refit them to the other side of
the door and boiler casing. Adjust the bottom bracket
until the door is correctly aligned.

Boiler components

4.2

The Grant Vortex range of automatic pressure jet oil
boilers have been designed for use with a fully pumped
central heating system with indirect domestic hot water
cylinder. They are not suitable for use with either a direct
cylinder or a 'primatic' cylinder or gravity hot water..

The boilers are suitable for use on sealed central
heating systems. System models are supplied with the
necessary components factory fitted. See Section 4.13.

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

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

For Conventional flue applications where a chimney is
to be lined - Grant recommends the use of the Grant
‘Orange’ flue system, specifically designed for the
Vortex range of condensing boilers. Refer to Section

4.7 for further details.
Where a rigid conventional flue - either internal or

external - is required, Grant recommends the use of the
Grant 'Green' and 'Orange' flue system components. As
no flue adaptor is supplied with the boiler it will be
necessary to purchase the Grant CF adaptor kit in
order to correctly connect the 'Green' and 'Orange
system flue components to the boiler.

Flue adaptor kit - Ref. CFA15/70 - is used for all Vortex
models from 15 to 70 kW as they all can use the 100 mm
'Green' and 'Orange' system components to construct a
flue of maximum vertical height 8 metres.

Important: The flue system materials and construction
MUST be suitable for use with oil-fired condensing

boilers. Failure to fit a suitable conventional flue may
invalidate the warranty on the boiler.

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 4.8 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

12

Grant Vortex Oil Boilers

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.

IMPORTANT

Before starting any work on the boiler, or fuel supply
please read the health and safety information given in
Section 12 on page 47.

4.4.1 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 steel tank may be used and must be constructed to
BS 799:5:1987 and OFS T200.

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.

Fuel supply

4.4

Installation of a Grant Vortex 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:-

OFST 100 Polythene oil storage tanks for

distillate fuels.

OFST 200 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).

4 - GENERAL BOILER INFORMATION

Regulations to comply with

4.3

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.

Fig. 2 - Kitchen System model

13

Grant Vortex Oil Boilers

4 - GENERAL BOILER INFORMATION

4.4.2 Fuel pipes

1 Fuel supply pipes should be of copper tubing with

an external diameter of at least 10 mm.
Galvanised pipe must not be used.
All pipe connections should preferably use flared
fittings. Soldered connections must not be used on

oil pipes.
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,

with the sensing head located above the burner.

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 adjacent to

the boiler. 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' type de-aerator is used, 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, Part No. RBS104.
6 Metal braided flexible pipes should be replaced

annually when the boiler is serviced. Long life

flexible pipes should be inspected annually and

replaced at least every 60 months.

4.4.3 Single pipe system - (See Fig. 3)

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.

4.4.4 Two pipe system - (See Fig. 4)

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. 4. 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 non­return 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 to purchase from Grant
Engineering (UK) Limited), Part No. RBS104. See
Section 4.4.6.

5 The pump vacuum should not exceed 0.4 bar.

Beyond this limit gas is released from the oil.

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. 3 - Single pipe system

Filter

Fire
valve

Shut-off
valve

Shut-off
valve

A

Sludge
valve

Fill
pipe

Vent
pipe

Level
gauge

Fuel
storage
tank

Fire
valve
sensor

Pump

Head A

(m)

Maximum pipe run (m)

0.5

1.0

1.5

2.0

10mm OD pipe

10
20
40
60

12mm OD pipe

20
40
80

100

14

Grant Vortex Oil Boilers

Fig. 5 - De-aeration device system

4.4.5 Tiger Loop system - (See Figs. 5 and 6)

1 When The storage tank is below the burner, an alternative

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

2 The de-aerator is connected close to the boiler as a

two pipe system (omitting the non-return valve) as
shown in Fig. 5. Refer to the manufacturers
instructions supplied with the de-aerator.
The de-aerator must be mounted vertically.

4 - GENERAL BOILER INFORMATION

Fig. 4 - Two pipe system

Note: To prevent any possibility of fuel fumes
entering the building, the de-aerator must be fitted
outside.

3 To be used with a de-aerator, 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 4.4.6.

Filter

Fire
valve

Shut-off
valve

Shut-off valve

Shut-off
valve

See

section 4.4.6

A

Return

Supply

Head A

(m)

Maximum pipe run (m)

0

0.5

1.0

1.5

2.0

3.0

3.5

10mm OD pipe

35
30
25
20
15

8
6

12mm OD pipe

100
100
100

90
70
30
20

Non
return
valve

Fire
valve
sensor

Sludge
valve

Fill
pipe

Vent

pipe
Level
gauge

Fuel
storage
tank

Fire
valve

Tankmaster

See

section 4.4.6

Sludge
valve

Fill
pipe

Vent
pipe

Fuel
storage
tank

De-aeration device

e.g. Tiger Loop

See Fig. 6

Fire
valve
sensor

Return

Supply

15

Grant Vortex Oil Boilers

4.4.6 Two pipe oil supplies
Riello RDB burner - See Fig. 7

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. 7) into the tapping in the return port.

2 The By-pass screw is supplied in the boiler

accessory pack.

3 On all models except 46/58 and 58/78:

Remove the plastic burner cover (secured by two
screws). To gain access, it may be necessary to
remove the plinth - loosen the screw securing the right
hand side of the plinth, then withdraw the plinth
forward from the right and away from the case.

On 46/58 and 58/70 models only:

Remove the plastic burner cover (secured by three
screws). It may be necessary to remove the burner
from the boiler to access the cover screws - see below.
For ease of access to the fuel pump, to fit the by-pass
screw and connect the oil lines, the burner can be
removed from the boiler. To do this, unscrew the
single nut at the top of the burner (using a 13 mm
spanner) and withdraw the burner from the boiler.

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.

1/4" BSP female

connections

Tiger Loop

SUPPLY

TO PUMP

RETURN

FROM PUMP

SUPPLY

FROM TANK

Fig. 6 - Tiger loop 'de-aeration' device

4 - GENERAL BOILER INFORMATION

Fig. 7 - Riello 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

1

2

3

4

5

6

7

8

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, providing 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 and supplementary earth bonding

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 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.

Electricity supply

4.5

16

Grant Vortex Oil Boilers

Fig. 8 - Air supply for room sealed balanced flue boilers

4 - GENERAL BOILER INFORMATION

Fig. 9 - Air supply for conventional flue boilers

BOILER
IN ROOM

Room sealed balanced flue

no ventilation required to room

BOILER
IN COMPARTMENT

Room sealed balanced flue

compartment ventilated from room

Room sealed balanced flue

compartment ventilated from outside

B

B

A

A

BOILER
IN ROOM

Conventional open flue

C

BOILER
IN COMPARTMENT

Conventional open flue

compartment ventilated from room

Conventional open flue

compartment ventilated from outside

C

C

D

D

E

46/58 kW
292 cm² (45 in²)
583 cm² (90 in²)

58/70 kW

358 cm² (56 in²)

715 cm² (112 in²)

Output
Vent A
Vent B

15/26 kW
116 cm² (18 in²)
231 cm² (36 in²)

26/36 kW
171 cm² (27 in²)
341 cm² (53 in²)

Output
Vent A
Vent B

36/46 kW
226 cm² (35 in²)
451 cm² (70 in²)

46/58 kW
292 cm² (45 in²)
583 cm² (90 in²)

875 cm² (136 in²)

58/70 kW

358 cm² (56 in²)
715 cm² (112 in²)
990 cm² (154 in²)

Output
Vent C
Vent D
Vent E

15/26 kW
116 cm² (18 in²)
231 cm² (36 in²)
347 cm² (54 in²)

26/36 kW
171 cm² (27 in²)
341 cm² (53 in²)
512 cm² (80 in²)

Output
Vent C
Vent D
Vent E

36/46 kW
226 cm² (35 in²)
451 cm² (70 in²)

677 cm² (105 in²)

Air supply

4.6

See Figs. 8 and 9

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.

17

Grant Vortex Oil Boilers

Fig. 10 - Grant Orange flue system in typical

brick chimney

4 - GENERAL BOILER INFORMATION

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.
All ventilation areas given are for domestic
applications. For all other cases refer to BS
5410 Part 2 1978.

Under no circumstances can Grant Vortex boilers
be installed with existing flue systems. Only flue
systems and components suitable for wet flues
should be used.
Failure to install the correct type of flue system will
invalidate the warranty.

See Fig. 10
General

Grant condensing boilers have high operating efficiencies
and low flue gas temperatures. Care must be taken to
ensure the flue system is suitable for the very low flue gas
temperatures and condensate in the flue gases.

Suitable conventional flue systems (Orange system)
are available from Grant UK - see Fig. 10.

1 The flue must terminate in a down draught free area,

i.e. at least 600 mm above the point of exit through the
roof or preferably above the ridge level.

2 The condensate may be allowed to run back into

the boiler. A condensate drain at the base of the
flue system is not required.

3 The flue terminal must be at least 600 mm from

any opening into the building, and 600 mm above
any vertical structure or wall less than a horizontal
distance of 750 mm from the terminal. See Fig. 11.

4 If an existing chimney is to be used, it must be lined

with a smooth bore stainless steel liner suitable for
use with oil fired condensing boilers. The top and
bottom of the annular space must be sealed.
The internal flue and liner diameter for all models
up to 46 kW output must be 100 mm (4 in) and for
the 46/58 and 58/70 models 125 mm (5 in).

Adjustable section
235 to 300mm

WXA250/100
WXA250/125

45 elbow

O

WE45/100
WE45/125

Brick
chimney

Flaunching

Locking band

C

Locking band

Terminal/top plate/
flexi flue adaptor

Rigid to flexi flue
connector (bottom)

Extension

Boiler flue
connector

Boiler

Flexi pack

Bottom fixings

Top fixings

Conventional flue system

4.7

Grant recommends the use of the Grant 'Orange'
flue system, specifically designed for the Vortex
range of condensing boilers. Refer to Section 4.7
for further details.
The maximum vertical height (from the top of the
boiler to the terminal) for the 'Orange' system is
19 metres.

18

Grant Vortex Oil Boilers

5 If a rigid flue is used internally or externally, it must

be of the twin-wall type incorporating seals at all
joints, constructed with a stainless steel inner skin and
be suitably insulated and weatherproofed. The internal
flue diameter for a rigid flue for all models - up to and
including the 58/70 - is 100 mm (4 in).
Grant recommends the use of the Grant 'Green' flue
system components for this application. Refer to
Section 4.1 for details. Note: As no flue adaptor is
supplied with the boiler it will be necessary to
purchase the Grant CF adaptor kit (Ref. CFA15/70)
in order to correctly connect the 'Green' system flue
components to the boiler.
If required, it is possible to use the white painted
single-wall straight flue extensions, adjustable
extensions and elbows from the Grant 'Orange' system
for the internal section of the flue system. These
components can be fitted between the boiler connector
and flue adaptor. The flue adaptor, to which the
external twin-wall 'Green' flue components are
connected, can therefore be situated just before the
flue system passes through the wall.
Note: Grant 'Orange' system single-wall flue
components must not be used externally.
The maximum vertical height (from the top of the
boiler to the terminal) for the 100 mm diameter
'Green' system twin-wall flue is 8 metres.

6 Twin-wall flues are recommended for externally

run flues to reduce the possibility of the condensate
freezing in the flue.

7 No part of any flue system should be made of an

asbestos material; aluminium must not be used in
any part of the flue. Only stainless steel flue
components should be used.

8 If the draught conditions are satisfactory, the flue

should terminate with a standard cowl.

9 Refer to the locally applicable Building

Regulations, BS 5410:1 and OFTEC Installation
Requirements (Books 2 and 3) for further guidance
on conventional flue systems.

It is important to ensure that the flue system is sealed
and that condensate cannot escape. Up to 1.5 l/h of
condensate can be produced in a conventional flue
system.

Only use flue systems suitable for oil fired condensing
boilers.

Do not use fire cement. The use of high temperature
silicone sealants is recommended.

4 - GENERAL BOILER INFORMATION

Part No.

GFKIT 6/100
GFKIT 6/125
GFKIT 8/100
GFKIT 8/125
GFKIT 10/100
GFKIT 10/125
GFKIT 11/100
GFKIT 11/125
GFKIT 12/100
GFKIT 12/125
GFKIT 14/100
GFKIT 14/125
GFKIT 16/100
GFKIT 16/125

Flexi Pack (Orange System)

100 mm dia. x 6 metre
125 mm dia. x 6 metre
100 mm dia. x 8 metre
125 mm dia. x 8 metre
100 mm dia. x 10 metre
125 mm dia. x 10 metre
100 mm dia. x 11 metre
125 mm dia. x 11 metre
100 mm dia. x 12 metre
125 mm dia. x 12 metre
100 mm dia. x 14 metre
125 mm dia. x 14 metre
100 mm dia. x 16 metre
125 mm dia. x 16 metre

Part No.

WX 150/100
WX 150/125
WX 250/100
WX 250/125
WX 450/100
WX 450/125
WX 950/100
WX 950/125

Extensions (Orange System)

100 mm dia. x 150 mm
125 mm dia. x 150 mm
100 mm dia. x 250 mm
125 mm dia. x 250 mm
100 mm dia. x 450 mm
125 mm dia. x 450 mm
100 mm dia. x 950 mm
125 mm dia. x 950 mm

Grant EZ-Fit Flexi Pack conventional flue system
(Orange System) - See Fig. 10

A range of Flexi pack conventional flue lining kits are
available from Grant UK. The packs have been
specifically produced for Grant Vortex oil fired
condensing boilers.

Contents of Grant EZ-Fit Flexi Pack

The pack includes a terminal/top plate/flexi flue adaptor,
stainless steel smooth bore flexible flue liner, a rigid to flexi
adaptor and a boiler flue connector. Two diameters are
available, a 100 mm for models up to 46 kW and 125 mm
for models above 46 kW.

Extensions

A range of white powder coated single wall extensions
are available to connect the boiler to the flexible liner.
The external diameter of the extensions is 150 mm.
Extensions are supplied with locking bands.

Flue extensions cannot be cut.

An adjustable extension and 45° elbow are also
available. See Fig. 10.

The rigid flue between the boiler and flexible flue liner
should incorporate an adjustable section to allow
inspection and cleaning of the flue system.

19

Grant Vortex Oil Boilers

4 - GENERAL BOILER INFORMATION

Apart from a conventional flue, several balanced flue
options are available for use with the Grant Vortex
boilers. All are suitable for use with Class C2 kerosene.

Note: None of the flue sections in the following
system can be cut.

1 Low level horizontal balanced flue (Yellow system)

Available in Short (for single thickness brick walls)
and Standard kits.

Extensions are available which extend the flue by
225 mm, 450 mm or 675 mm. 90° and 45° elbows
are also available.

The maximum flue length - from the centre of the
boiler flue outlet to the outer face of the wall - is 4
metres (with or without elbows included). No more
than 2 x 45° or 1 x 90° elbow should be fitted per
system.

IMPORTANT: For Vortex boilers with the flue to
the left hand side - leave a minimum gap of 150
mm between the side of the boiler and the wall to
accommodate the condensate trap.

2 High level (horizontal) balanced flue (White

system)

Allows the flue to rise vertically within the building
before exiting through the wall horizontally.

The maximum flue length - from the top of the
boiler flue outlet to the outer face of the wall - is 6
metres for all Vortex boilers.

Extensions are available which extend the flue by
225 mm, 450 mm or 950 mm. An adjustable
extension of 275 to 450 mm is also available.

A 45° elbow is also available. No more than 2 x 45°
elbows should be fitted per system. Each elbow reduces
the overall maximum length of the system by 1 metre.

3 Vertical balanced flue (White system)

Allows the flue to rise vertically from the boiler to
exit through the roof.

The maximum flue length - from the top of the
boiler flue outlet to the terminal - is 8 metres for all
Vortex boilers.

Balanced flue options

4.8

Extensions are available which extend the flue by
225 mm, 450 mm or 950 mm. An adjustable
extension of 275 to 450 mm is also available.

A 45° elbow is also available. No more than 2 x
45° elbows should be fitted per system. Each elbow
reduces the overall maximum length of the system
by 1 metre.

4 External balanced flue (Green system)

Where it is not practical to use a low level (Yellow
system) or internal high level/vertical (White
system) balanced flue, the boiler can be fitted with
an external vertical/high level flue (Green system).
See Fig. 10a.

The Starter kit fits to the boiler in the same way as a
low level balanced flue (Yellow system) and the
external Tee allows the connection of a twin wall
insulated flue pipe and a combustion air inlet ­providing a room sealed flue system. The external
system can terminate at either high level or vertically
(above roof level) as required. See Fig. 10a.

The minimum dimensions for locating the terminal
from building features (windows, doors, etc.) are
shown in Fig. 11.

If the flue terminal is fitted less than 2 metres above a
surface to which people have access, the terminal must
be protected by a guard. The guard must be fitted
centrally over the flue terminal and securely fixed to
the wall.

The low level balanced flue (Yellow system) is
supplied with a stainless steel guard. This must be
fitted in all circumstances to prevent objects from
entering the flue outlet.

The terminal must be positioned so as to avoid
products of combustion accumulating in stagnant
pockets around the buildings or entering into
buildings. Care should be taken that the plume from
condensed flue gases does not cause a nuisance.

The following external flue (Green system) components
are available from Grant UK.

20

Grant Vortex Oil Boilers

4 - GENERAL BOILER INFORMATION

Fig. 10a - External balanced flue (Green system)

Green System components

Item - for models up to 70 kW output

Starter kit - standard
Starter kit - short
150 mm extension
250 mm extension
450 mm extension
950 mm extension
195-270 mm adjustable extension
45° elbow
High level terminal
Vertical terminal
Wall bracket - standard
Wall bracket - extended

Part No.

GK200
GK200S
GX150/200
GX250/200
GX450/200
GX950/200
GXA250/200
GE45/200
GTH200
GTV200
GWB200
GEB200

Green System components

Item - for models up to 26 kW output

Starter kit - standard
Starter kit - short
150 mm extension
250 mm extension
450 mm extension
950 mm extension
195-270 mm adjustable extension
45° elbow
High level terminal
Vertical terminal
Wall bracket - standard
Wall bracket - extended

Part No.

GK90
GK90S
GX150/90
GX250/90
GX450/90
GX950/90
GXA250/90
GE45/90
GTH90
GTV90
GWB90
GEB90

Vertical terminal kit
GTV90 (15 - 26 kW)
GTV200 (26 - 46 kW)

45 elbow kit
GE45/90 (15 - 26 kW)
GE45/200 (26 - 46 kW)

O

Starter kit
GK90(15-26kW)
GK200 (26 - 46 kW)
GK90S-short(15-26kW)
GK200S - short (26 - 46 kW)

High level terminal kit
GTH90 (15 - 26 kW)
GTH200 (26 - 46 kW)

Extension kits

Wall bracket

Extended wall bracket

Locking band

Air

intake

DO NOT

OBSTRUCT

Components and Part Numbers

Typical
flue system

21

Grant Vortex Oil Boilers

For additional protection of either the entire heating
system, or the boiler and localised pipework, it is
recommended that a frost thermostat be installed.
Refer to Section 9 for connection details.

To protect the heating system, the frost thermostat
should be sited within the house in such a place that it
can detect any rise and fall in the ambient air
temperature, i.e. in a room with a radiator.

Frost protection

4.9

4 - GENERAL BOILER INFORMATION

Fig. 11 - Clearances for Balanced flues

Notes: * 75 mm with protection.

** Only applies if one or both terminals are balanced flues.

Distances measured to rim of terminal.

Clearances recommended by Grant
Engineering (UK) Limited in accordance with
British Standards and Building Regulations.

A Below a gutter or sanitary pipework
B Horizontal from an opening, air brick or window
C Above ground or balcony level
D Below eaves or balcony
E From an internal or external corner
F From a terminal facing the terminal
G From a surface facing the terminal
H Vertical from terminals on the same wall
I Horizontal from terminals on the same wall
J Below an opening, air brick, window etc.
K From vertical sanitary pipework
L Vertical flue from a wall
M From an oil storage tank

Min. distance (mm)Terminal position

* 600

600
300

*600

300

1200

600

1500

**750

600
300
750

1800

Notes:1 An opening means an openable

element, such as an openable
window, or a permanent opening
such as a permanently open air vent.

2 Notwithstanding the dimensions

given, a terminal should be at least
300 mm from combustible material,
e.g. a window frame.

3 A way of providing protection of

combustible material would be to fit
a heat shield at least 750 mm wide.

Where the frost thermostat is installed outside the house (to
protect a boiler installed in an external boiler room or
garage) or in an attic, it is recommended that it be used in
conjunction with a pipe thermostat to avoid unnecessary and
wasteful overheating of the property. The pipe thermostat
should be located on the boiler return pipe, and set to operate
at 25° C. Refer to Section 9 for connection details.

22

Grant Vortex Oil Boilers

4 - GENERAL BOILER INFORMATION

Boiler location

4.10

1 The boiler must stand on a surface that is firm and

level. It does not require a special hearth as the
temperature of the boiler base is less than 50° C.

2 Sufficient clearance must be allowed at the front of the

boiler to remove the burner and baffles for servicing.

3 Kitchen and Utility models only - Once the boiler

has been installed, a permanent worktop may be
fitted over it as access to the top of the boiler is no
longer required after installation.

Kitchen System and Utility System boilers require
a removable section of worktop above the boiler to
provide access for servicing.

4 Care should be taken when siting the condensate

trap. See Section 4.17.

Flow connections - Kitchen/Utility models
On all models except the 46/58 and 58/70: A push-fit

connection is provided for the heating flow - a 22 mm
elbow on the 15/26 and a 28 mm straight connector on
the 26/36 and 36/46.
Both the elbow connector (15/26) or boiler flow pipe/
connector (26/36 and 36/46) can swivel to allow the
heating flow to pass through either the left or right
hand side case panel - via the holes provided.
The 46/58 and 58/70 models have a 1¼" BSP tapping
on top of the boiler, see Fig. 12.

Flow connections - System models

All system models are supplied with a push-fit elbow
connection for the heating flow - 22 mm (15/26) or 28 mm
(26/36 and 36/46).

Return connection (see also Section 5.4) - All models
except the 46/58 and 58/70 have a stainless steel pipe on
the right hand side for the return connection - 22 mm for
the 15/26 models or 28 mm for the 26/36 and 36/46
models.
The 46/58 and 58/70 models have a 1¼" BSP tapping
on top of the boiler, see Fig. 12.

A compression fitting must be used on the stainless steel
return connection.

Holes are provided in the casing side panels to route
the return to the left - 15/26 models only, see Fig. 12a.

IMPORTANT: All pipes to be fitted into the push-fit
connectors provided should be cut using a pipe slicer
or pipe cutter - to leave the pipe ends with a slight
radius and free from any burrs or sharp edges. Pipes to
be used with these fittings should not be cut square
using a hacksaw.

Water connections

4.11

Water connections - System models

4.12

1 A 15 mm discharge pipe must be connected to the

safety valve outlet connection. The pipework between
the safety valve and the boiler must be unrestricted,
i.e. no valves. The discharge pipe should be run to the
outside of the building and terminate so that it cannot
cause injury to persons or property.

2 A 15 mm double check valve ballofix type valve is

provided on the flexible filling loop hose for
connection of the cold mains supply to the heating
system. The cold mains supply should terminate
inside the boiler casing.

3 A drain cock is fitted at the bottom on the front of

the boiler to allow the heating system to be drained

4 The expansion vessel is connected via a flexible

hose to allow it to be moved to gain access to the
baffle cleaning cover. When replacing the vessel,
care should be taken to ensure that the flexible
connecting hose is not twisted.

Fig. 12 - 46/58, 58/70 flow and return connections

H

E

A

T

I

N

G

R

E

T

U

R

N

Return connection

Flow connection

Boiler thermostat and
Overheat thermostat phials

23

Grant Vortex Oil Boilers

4 - GENERAL BOILER INFORMATION

All models

To avoid the danger of dirt and foreign matter entering
the boiler the complete heating system should be
thoroughly flushed out - before the boiler is connected
and then again after the system has been heated and is
still hot. This is especially important where the boiler
is used on an old system.

For optimum performance after installation, this boiler and its
associated central heating system must be flushed in accordance
with the guidelines given in BS 7593:1992 'Treatment of water
in domestic hot water central heating systems'.

This must involve the use of a proprietary cleaner,
such as BetzDearborn's Sentinel X300 or X400, or
Fernox Restorer. Full instructions are supplied with the
products, but for immediate information, please
contact BetzDearborn on 0151 4209563 or Fernox on
0179 9550811.

For Long term protection against corrosion and scale,
after flushing, it is recommended that an inhibitor such as
Betzdearborn's Sentinel X100 or Fernox MB-1 is dosed
in accordance with the guidelines given in BS 7593:1992.

Failure to implement the guidelines will invalidate the
warranty.

Fig. 12a - View with rear panel removed - 15/26 models only

Sealed systems

4.13

See Fig. 13

1 All Grant Vortex boilers are suitable for use with

sealed systems complying with the requirements of
BS 5449.
The maximum temperature of the central heating
water is 80° C.

2 The system must be provided with the following items:-

a Diaphragm expansion vessel complying with

BS 4814.
b Pressure gauge.
c Safety valve.
d Approved method for filling the system.

Refer to BS 7074:1 for further guidance.

3 The expansion vessel can be fitted in either the

return or flow pipework in any of the
recommended positions as shown in Fig. 13. To
reduce the operating temperature of the expansion
vessel diaphragm, position it below the pipe to
which it is connected. The expansion vessel may be
positioned away from the system, providing the
connecting pipe is not less than 13 mm diameter.

4 The pressure gauge should have an operating range

of 0 to 4 bar.

5 The safety valve, set to operate at 2.5 bar, should

be fitted in the flow pipework near to the boiler.
The pipework between the safety valve and boiler
must be unrestricted, i.e. no valves. The safety
valve should be connected to a discharge pipe
which will allow the discharge to be seen, but
cannot cause injury to persons or property.

24

Grant Vortex Oil Boilers

4 - GENERAL BOILER INFORMATION

Fig. 13 - Sealed system

6 Provision should be made to replace water lost

from the system. This can be done manually (where
allowed by the local water undertaking) using an
approved filling loop arrangement incorporating a
double check valve assembly (as supplied fitted on
System models).

7 An automatic air vent should be fitted to the

highest point of the system.

8 The system design pressure (cold) should be between

0.5 and 1.0 bar. This pressure is equivalent to the
maximum static head (see Fig. 14) in bar + 0.3 (1 bar
= 10.2 metres of water).

9 If thermostatic radiator valves are fitted to all

radiators, a system by-pass must be fitted. The by­pass must be an automatic type.

Fig. 14 - Sealed system boilers

If thermostatic radiator valves are fitted, the
system must incorporate an adequate by-pass.

10 Filling of the system must be carried out in a

manner approved by the local Water Undertaking.
Where allowed, the system may be filled via the
filling loop supplied (the loop arrangement
includes a double check valve assembly).

11 All fittings used in the system must be able to

withstand pressures up to 3 bar.

12 Radiator valves must comply with the requirements

of BS 2767(10):1972.

13 One or more drain taps (to BS 2879) must be used

to allow the system to be completely drained.

14 The expansion vessel is connected via a flexible

hose to allow it to be moved to gain access to the
baffle cleaning cover. When replacing the vessel,
care should be taken to ensure that the flexible
connecting hose is not twisted.

25

Grant Vortex Oil Boilers

4 - GENERAL BOILER INFORMATION

Fig. 15 - Vortex 26/36 Utility System model shown

Boiler components - System models

4.14

Top view

Burner

Lock-out
button

Air supply
tube

Heating return
(not shown)

Automatic
air vent

Automatic
air vent

Heating flow

Condensate
drain outlet
(not shown)

Circulating
pump

Pressure
relief valve

Thermostat
bulbs

Filling loop

All System models have the following sealed system
components factory fitted (refer to Fig. 15):-

a A diaphragm expansion vessel complying with

BS 4814, pre-charged at 1.0 bar. Refer to
Section 3.2.

b System pressure gauge, with an operating range

of 1 to 4 bar.

c Pressure relief safety valve complying with

BS 6759 and set to operate at 2.5 bar.

d Automatic air vent, fitted to the flow pipe of the

boiler, ensures the boiler is vented.

e Filling loop. This must be isolated and

disconnected after filling the system.

3 Refer to Section 3.2 for system volume and BS

7074: for further guidance. Refer to Section 5.6 for
further details of the expansion vessel.

On underfloor systems it is essential that the return
temperature must be maintained above 40° C to
prevent internal corrosion of the boiler water jacket.

Underfloor heating systems

4.15

Fig. 16 - Thermostat phial position - 15/26 only

Fig. 15a Thermostat phial position - 26/36 only

26/36 System
boiler shown.
For non system boilers
pockets are on side of pipe.

26

Grant Vortex Oil Boilers

Fig. 17 - Condensate trap

General - Grant boilers are compatible with both
copper and plastic pipe. Where plastic pipe is used it
must be of the oxygen barrier type and be of the
correct class (to BS 7291:Part 1:1990) for the
application concerned.

IMPORTANT: The first metre of pipework
connected to both the heating flow and return
connections of the boiler must be made in copper on
all types of system - sealed or open-vented..

Sealed systems - If plastic pipe is to be used, the
installer must check with the plastic pipe manufacturer
that the pipe to be used is suitable for the temperature
and pressures concerned. Pipe must be Class S to BS
7291: Part 1:1990.

The system should incorporate a low-pressure switch
to shut off power to the boiler if the system pressure
drops below 0.2 bar. A suitable low pressure switch kit
is available to purchase from Grant Engineering (UK)
Limited, Part No. MPCBS 62.

Underfloor systems - Plastic pipe may be used on
Underfloor systems where the plastic pipe is fitted
after the thermostatic mixing valve. Copper tube must
be used for at least the first metre of flow and return
primary pipework between the boiler and the
underfloor mixing/blending valves.

When in condensing mode the Grant Vortex boiler
produces condensate from the water vapour in the flue
gases. Provision must be made for the safe and
effective removal of the condensate.

Condensate can be disposed either internally - into an
internal domestic waste system or directly into the soil
stack, or externally - to an external soil stack, gully,
hopper or soakaway.

It should be noted that connection of a condensate pipe to the
drain may be subject to local Building Control requirements.

Pipework

Condensate disposal pipework must be plastic (plastic
waste pipe is suitable). Copper or steel pipe is NOT
suitable and should NOT be used.

The internal diameter of condensate disposal pipes
should not be less than 20 mm - e.g. 22 mm plastic
plumbing pipe or 19 mm (¾") plastic overflow pipe.

Condensate disposal pipes must be fitted with a fall of

2.5° (1:20).

4 - GENERAL BOILER INFORMATION

For boilers installed where it is not possible for the pipe
to fall towards the point of discharge - either internally
into a waste system or externally to a gulley - e.g. in a
basement, it will be necessary to use a condensate pump.

Condensate disposal pipes should be kept as short as
possible and the number of bends kept to a minimum.
Pipes should be adequately fixed to prevent sagging,
i.e. at no more than 0.5 metre intervals.

Ideally, external pipework, or pipework in unheated
areas such as garages, should be avoided. If
unavoidable, external pipework should be kept as short
as possible (less than 3 metres) and 32 mm waste pipe
used to minimise the risk of freezing.

The number of bends, fittings and joints on external
pipes should be kept to a minimum to reduce the risk
of trapping condensate.

Condensate trap

Condensate disposal pipes MUST be fitted with a trap

- whether they are connected internally or externally.
All Grant Vortex boilers are supplied with a

condensate trap to provide the required 75 mm water
seal in the condensate discharge pipe from the boiler.
This trap incorporates a float (which will create a seal
when the trap is empty) and an overflow warning
outlet (fitted with a rubber bung), See Fig. 17.

Pipework materials

4.16

Condensate disposal

4.17

The trap must be located internally in an accessible
position to allow for routine maintenance. The
mounting bracket supplied with the trap MUST be
used - the trap should NOT be supported by the
condensate pipework only.

27

Grant Vortex Oil Boilers

A 22 mm push-fit plastic plumbing connector is
supplied with the boiler to connect the plastic pipe to
the stainless steel condensate outlet pipe - on the left
hand side of the boiler.

Use 22 mm plastic plumbing pipe between the boiler
and the inlet of the trap. Either 22 mm plastic
plumbing pipe or 19 mm (¾") overflow pipe can be
used from the outlet of the trap.

Note: Due to the wall thickness of plastic plumbing
pipe, it may be necessary to chamfer the internal edge
of the pipe before fitting it onto the spigot in the outlet
of the trap.

If connecting the condensate discharge internally - into
a waste system or soil stack - the bung must be fitted in
the overflow outlet of the trap.

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). Turn off the boiler and
contact your service engineer.

Care should be taken when siting the trap such that the
overflow outlet is readily visible and that any
condensate overflowing from the outlet cannot cause
either a hazard to persons or damage to surrounding
property or equipment.

Fig. 18 - Purpose made condensate soakaway

4 - GENERAL BOILER INFORMATION

IMPORTANT: The trap MUST be checked at regular
intervals (e.g. on every annual service) and cleaned as
necessary to ensure that it is clear and able to operate.

It is recommended that, if there is access to the left
hand side of the boiler, the condensate pipe be
connected to the boiler using a 'tee-piece' and cap to
form a 'rodding eye' - to allow cleaning inside the back
of the condensing heat exchanger via the boiler
condensate outlet.

In the case of the 15/26 Kitchen and Utility models
only, the condensate pipe can be routed through the
back of the boiler, to the right hand side. See Fig. 12a.

Condensate soakaway

To keep external pipework to a minimum, locate the
soakaway as close as possible to the boiler whilst
ensuring it is located clear of building foundations and
other services, e.g. gas, electricity, etc.

The soakaway should be located at least 500 mm from
any adjacent building.

Ensure that the drainage holes in the soakaway tube
face away from the building.

Only use a soakaway where the soil is porous and
drains easily. Do not use in clay soils or where the

soil is poorly drained.

Backfill the hole around the soakaway tube with 10 mm
limestone chippings.

Ground level

32 mm waste pipe external to the building

2.5 fall

O

25 mm

300 mm

400 mm

min.

Two rows of3x12mm
holes at 25 mm centres
and 50 mm from the bottom
of the tube. Holes facing
away from the property.

Cement seal

100 mm

plastic

tube

Sealed

end

Backfill with 10 mm
limestone chippings

28

Grant Vortex Oil Boilers

1 Carefully remove the packaging from the boiler

and remove it from the transit pallet.

2 Either open the boiler door (Kitchen models) or

pull off the boiler front panel (Utility models) and
remove the literature packs. Give the User
Information pack to the householder.

3 Lift off the two parts of the case top and remove

the water connecting fittings.

Unpack the boiler

5.1

Prepare the wall

5.2

5 - BOILER INSTALLATION

See Fig. 19 and 19a

If the boiler is to be used with a low level balanced
flue (Yellow system) make the hole in the wall for the
flue as shown in Fig. 19a.

Note: Dimension B given in Fig. 19a includes an
extra 10 mm over the size of the terminal to provide
clearance for fitting.

Fig. 19a - Low level balanced flue (Yellow System) and Starter kit (Green System)

Fig. 19 - Low level balanced flue

Utility 46/58, 58/70
Utility 26/36, 36/46 and Utility System 26/36, 36/46
All other models

A

1102

780
768

Dimension (mm)Model

B dia

162
162
127

C
112
115
115

29

Grant Vortex Oil Boilers

5 - BOILER INSTALLATION

Fig. 20a - High level balanced flue (White system)

Fig. 20 - High level balanced flue

*Dimension A for Starter section and elbow/terminal only

High level and vertical balanced flue

5.3

See Fig. 20 and 20a

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. 20a.

Note: Dimension B given in Fig. 20a includes an
extra 10 mm over the size of the terminal to provide
clearance for fitting.

Fitting instructions for the high level balanced flue and
vertical balanced flue are supplied with the flue kits.

Adjustable sections: The adjustable extensions are
telescopic. The wall terminal section is adjustable and
is suitable for a wall thickness of 215 mm to 450 mm.
Simply adjust to the required length using a twisting
motion. The outer pipes must overlap by a minimum
of 25 mm.

Utility 46/58, 58/70
Utility 26/36, 36/46 and Utility System 26/36, 36/46
All other models

2015 - 2335
1700 - 2020
1715 - 2115

Dimension (mm)Model

B dia

200
200
175

C
109
115
115

A
1595*
1280*
1215*

30

Grant Vortex Oil Boilers

Refer to Section 4.11 and 4.12.

Flow connection

The Flow pipework can be routed to either side of the
boiler, dependant on the type and direction of the flue
system used.
On all models, except the 46/58 and 58/70, a push-fit
connector is supplied fitted on the flow connection. On
the 46/58 and 58/70 the flow connection is a 1/¼"
female tapping – refer to Fig.12.

Return connection

On all models, except the 46/58 and 58/70, the return
pipework is connected to the stainless steel pipe
protruding from the right hand side panel using a
compression fitting (not supplied).
On the 46/58 and 58/70 models the return connection
is a 1/¼" female tapping – refer to Fig.12.
On the 15/26 Kitchen and Utility models, holes are provided
in the rear of the casing side panels to allow the return and
condensate pipework to be run through the back of the
boiler. It will be necessary to remove the back panel from the
boiler casing to fit this pipework, and to refit the panel before
placing the boiler in its final position.

Pipe holes

All models except the 46/58 and 58/70 have holes to
enable the pipework to exit the boiler casing. On the
15/26 models these holes are at the rear of both side
panels and on the 26/36 and 36/46 models these holes
in the removable flue outlet cover plates.
On the 46/58 and 58/70 models the flue outlet cover
plates can be repositioned to provide a vertical
‘letterbox’ pipe opening, on either side of the boiler as
required.
To do this, first remove both casing top panels.
Slacken the nuts on the four fixing studs on the side
cover plate to be moved. Slide the plate forwards by
approx 50 mm and re-tighten nuts.
If access will be restricted, make any connections to
the boiler before placing it in its final position.
If using a balanced flue system - Install the balanced flue
system before connecting the heating system pipework to
the boiler. Once the flue system is fitted then complete the
water connections and fill the heating system.

If using a conventional flue system - Complete the
water connections and fill the heating system.

Check all connections for leaks and rectify as necessary.

Make the water connections

5.4

5 - BOILER INSTALLATION

1. Lift off upper rear casing panel.

2. Remove the insulation from the underside of the
panel (do not discard it) and remove the blanking
panel. Discard the blanking panel but retain the
nuts and washers.

3. Unscrew the protective covers from the studs on
the flue dress panel supplied in the literature pack.
Place the dress panel in position in the rear casing
top panel and secure in place using the nuts and
washers previously removed.

4. Re-fit the insulation to the panel with the foil
surface facing outwards. With a sharp knife cut
around the edge of the round opening in the dress
plate to leave a round hole through the insulation
for the flue.

5. If the Grant ‘Orange’ flue system is being used –
follow the instructions supplied with the flue kit.

6. If the Grant ‘Green’ system (100 mm rigid twin­wall flue) is to be fitted to the boiler then the Grant
CF adaptor kit (Ref. CFA15/70) must be used –
refer to Section 4.1. To fit the adaptor kit, proceed
as follows.

7. Fully screw the length of threaded studding
(provided in the kit) into the nut located in the
centre of the boiler flue outlet.

8. Fit the boiler connector (from the CF adaptor kit)
over the threaded studding. Position flange on to
the neoprene gasket around the boiler flue outlet,
ensuring that small spigot on the base of the
connector is located in the hole in the centre of the
neoprene gasket and that end of studding passes
through the hole in the of the spacer bracket. Fit
washer and wing nut provided onto end of threaded
studding and secure connector in position by
tightening down on wing nut – as shown in Fig.21.

9. Re-fit the rear top casing panel to the boiler –
fitting it over the boiler connector.

10.Fit the flue adaptor (from the adaptor kit) into the
boiler connector. Note lubricate the seal on the
adaptor using the lubricant provided before
attempting to fit the flue adaptor.

11.Fit the first section of flue into the flue adaptor and
secure using the clamp band provided.

12.Assemble the remainder of the flue system as
required, lubricating the seal on each component
before fitting.

Connect a conventional flue

5.5

31

Grant Vortex Oil Boilers

Expansion vessel pressure - System models

5.6

Fig. 21 - Boiler flue connector

5 - BOILER INSTALLATION

The expansion vessel fitted, is supplied with a charge
pressure of 1.0 bar (equivalent to a max. static head of

10.2 metres). The charge pressure must not be less
than the actual static head at the point of connection.
Do not pressurise the vessel above 1.5 bar.

The air pressure in the vessel must be checked annually.
The central heating system volume, using the expansion

vessel as supplied, must not exceed the recommended
volumes. If the system volume is greater, an extra
expansion vessel (complying with BS 4841) must be
fitted as close as possible to the central heating return
connection on the boiler. The charge pressure of the extra
vessel must be the same as the vessel fitted in the boiler.
Refer to BS 7074:1 for further guidance.

The air charge pressure may be checked using a tyre
pressure gauge on the expansion vessel Schraeder
valve. The vessel may be re-pressurised using a
suitable pump. When checking the air pressure the
water in the heating system must be cold and the
system pressure reduced to zero.

It is recommend that the boiler should be connected to
a switched mains power supply from a programmer or
control system. If a Grant plug-in programmer is used,
a permanent 240 V mains supply (fused at 5 Amp)
must be taken to the boiler. A three core cable is
required to connect the boiler terminal block to the
live supply. Refer to Sections 9.5 and 9.6 for typical
control system wiring diagrams.

1 Lift off the boiler case top panel, if it has not

already been removed.

2 Remove the top of the control panel (Utility

models) or the wiring cover (on Kitchen models)
and open the cable clamp. Route the supply cable
through the hole in the rear panel (using the
grommet supplied) up to the control panel, pass it
through the cable clamp and connect to the boiler
terminal block (refer to Section 9) as follows:-

Brown to live (terminal 1)
Blue to mains neutral (terminal 2)
Green/Yellow to mains earth (terminal 3)

Kitchen and Kitchen System models - If the plug-in
programmer is not fitted, ensure that the RED wire
link, between terminals 1 and 8 (1 and 10 on System
model) on the boiler terminal block is fitted.

Note: Ensure that the route and length of the cable
is such that the boiler front cover plate can be
easily removed without disconnecting the supply
cable from the terminal block.

3 If the optional plug-in electronic programmer is to

be fitted, follow the fitting instructions given in

Section 5.8 at this point.
4 Secure the cable in the cable clamp.
5 Place the wiring cover in position over the terminal

block, taking care not to trap any wires and secure

in position with the two M4 screws provided.
6 Ensure that all external wiring is adequately supported.
Do not switch on the electricity supply at this stage.

Connect the power supply

5.7

32

Grant Vortex Oil Boilers

1 Pump
2 Control box
3 Reset button with lock-out lamp
4 Flange with gasket (do not remove from boiler)

5 - BOILER INSTALLATION

5 Carefully fit the programmer into the aperture and

gently push fully home.

6 Connect the control system wiring to the boiler

terminal block. Refer to Sections 9.5 and 9.6 for
details of typical system control wiring diagrams.

Important: Disconnect and remove the RED wire
link between terminals 1 and 8 (1 and 10 System
model) on the 12-way boiler terminal block.

7 Replace the back of control panel and complete the

electrical connection procedure from paragraph 2
of Section 5.7.
Refer to the User's Operating manual provided with the
boiler for the operation and setting of the programmer.

See Fig. 7

If a two pipe system is to be used refer to Section

4.4.6.
1 Remove the oil inlet plug from the fuel pump and

connect the elbow of the flexible fuel line supplied
with the boiler.

2 Connect the flexible fuel line to the rigid supply

using the adaptor supplied. The supply enters
through one of the holes in the casing plinth.

Important: Ensure the electrical supply to the boiler
has been isolated before fitting the programmer.

Remove the screws holding the back of the control
panel in place and move it back enough to allow
access to the rear of the timer aperture.

1 From underneath the control panel, remove the

screw securing the bracket behind the timer
aperture. Withdraw and discard the bracket.

2 Remove the blanking piece from the timer aperture,

in the control panel fascia, by firmly pressing on
the centre of the square until it is detached from the
rear of the fascia. Remove the blanking piece from
the panel and discard.

3 Check that the wiring harness supplied with the

programmer is correctly connected to it as
follows:­Brown wire to Mains Line (L) terminal of
programmer
Blue wire to Mains Neutral (N) terminal of
programmer
Red wire to Heating On terminal of programmer
Brown wire to Water On terminal of programmer
Yellow wire to Water Off terminal of programmer

4 Connect the programmer to the boiler wiring by

connecting the 6-way plug and socket, ensure the
plug is pushed firmly into the socket.

Fit the programmer Kitchen, Kitchen System

5.8

Connect the fuel supply

5.9

Fig. 22 - Riello RDB burner components

5 Air damper adjustment screw
6 Air supply tube connection (balanced flue)
7 Pump pressure adjustment screw
8 Pressure gauge connection

Burner components

5.10

7

8

1

23

5

4

6

33

Grant Vortex Oil Boilers

1 Automatic air vent(s) are fitted to the top of the

boiler (see Fig. 15). Check that the small cap on the
top of each air vent is screwed on fully, then
unscrew it one complete turn - the cap remains in
this position from now on.

2 If the flexible filling loop is used to fill the system, ensure

it is connected and that the valve connecting it to the
boiler is open and the 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 Ensure that the mains cold water supply valve is open

(operating lever in line with the valve), then turn on the
mains cold water supply and gradually open the front
valve on 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.

5 It is important that the pump is properly vented to

avoid it running dry and damaging its bearings. To
gain access to the pump for venting it is necessary
to remove the control panel.
Loosen the four fixing screws securing the panel to the
casing, push the panel towards the rear of the boiler and
lower the control panel to expose the pump.
Remove the cap, then unscrew and remove the plug
from the centre of the pump. Using a suitable
screwdriver rotate the exposed spindle about one
turn. Replace the plug and cap.

5 - BOILER INSTALLATION

6 Check the operation of the safety valve by turning

the head anticlockwise until it clicks. The click is

the safety valve head lifting off its seat allowing

water to escape from the system.

Check that this is actually happening.
7 Continue to fill the system until the pressure gauge

indicates between 0.5 and 1.0 bar. Close the fill point

valve and check the system for water soundness,

rectifying where necessary. Water may be released

from the system by manually operating the safety

valve until the system design pressure is obtained.
8 The system design pressure (cold) should be

between 0.5 bar and 1.0 bar. The pressure is

equivalent to the maximum static head in bar + 0.3

(1 bar = 10.2 metres of water), where the static

head is the vertical height from the centre of the

expansion vessel to the highest point of the system.
9 Close the valves either side of the filling loop and

disconnect the loop.

Please ensure that the OFTEC CD/10 installation
completion report (provided with the boiler) is
completed in full.

Leave the top copy with the User. Retain the carbon
copy.

Ensure that the User Information pack (supplied with
the boiler) is handed over to the Householder.

Fill the sealed system

5.11

Completion

5.12

34

Grant Vortex Oil Boilers

Refer to Fig. 23 for boiler controls

It is important that the following commissioning
procedure is carried out to ensure safe and efficient
operation of the boiler.

Note: Check that the baffles are in position and
that the cleaning cover is correctly fitted and a
good seal made.

IMPORTANT:
Check that the turbulators are in position and that
the ends are vertical (see Fig. 26).

Note: If the 15/26 models are down rated to 20 or
15 kW, the burner head must be changed to a T1
head. See Section 3.3.

1 Check that the water system has been vented (and

pressurised if sealed system) and there are no leaks.
Ensure the automatic air vent on the condensing

heat exchanger is open.

2 Check that all fuel line valves are open.
3 Remove the plastic burner cover if it was not

previously removed.

4 Connect a combined vent manifold and pressure

gauge to the pressure gauge connection port on the oil
pump. See Fig. 7. Open the vent screw on your vent
manifold to vent the supply while the pump is running.

5 Set the boiler On/Off switch to Off. Check that all

system controls are calling for heat and turn the
boiler thermostat to maximum. Switch on the
electricity supply.

6 Set the boiler On/Off switch to On. The burner fan

should start and the burner should light within
about 12 seconds. If the burner does not light and
the 'Lock-out' reset button lights, wait for about 45
seconds then press the reset button to restart the
ignition process. This procedure may have to be
repeated several times during first lighting.

7 With the burner alight, check the fuel pressure.

Refer to the Technical Information, Section 3.3.
Adjust the pressure if necessary - see Fig. 7. Note
that the 'Mains On' neon lights when the boiler is
switched on, but does not necessarily indicate the
burner is firing.

8 Operate the boiler until it reaches normal operating

temperature. Check oil supply/return pipe for leaks,
rectifying where necessary.

9 Check the operation of the boiler thermostat.

Ensure that by turning it anticlockwise it switches
the burner off.

6 - COMMISSIONING

Fig. 23 - (Kitchen model shown)

35

Grant Vortex Oil Boilers

6 - COMMISSIONING

10 With the burner alight, re-check the fuel pressure and

re-adjust if necessary. Turn the boiler off, remove the
pressure gauge and replace the plug in the pump.

11 Having ensured that there are no oil leaks, replace the

burner cover. Ensure the flexible air tube is connected
to the burner (balanced flue models).

12 Relight the boiler and allow it to run for at least 20

minutes.

13 Check the smoke number, if satisfactory check the

CO2. Set the CO2 to the value given in Section 3.3
for the boiler concerned.

Use the hexagonal key supplied to adjust the
burner air damper (see Fig. 22) as required.
Turning the screw anti-clockwise closes the
damper and increases CO2 level, turning the screw
clockwise opens the damper and reduces CO2 level.

Re-check the smoke number if the damper has been
moved. Under no circumstances must the smoke
number be above 1.

Note: It is important that the air damper is
correctly set.

14 Check the flue gas temperature.
15 Check that both the boiler overheat and boiler control

thermostat bulbs are correctly located in their
respective pockets. For location of thermostat pockest,
refer to Figs. 12, 15 or 16 - depending on the boiler
model concerned.
Also check the condition of both thermostat capillaries,
i.e. that they are not damaged, broken or kinked, and
that they are not trapped or crushed between any

internal boiler components.
16 Replace the case top.
17 When the boiler has been adjusted and is running

satisfactorily, balance the central heating system by

adjusting the radiator lock shield valves. Start with

the radiator nearest the boiler and adjust the valves

to achieve the required temperature drop across

each radiator. If thermostatic radiator valves have

been installed, check the system by-pass.
18 Switch off the boiler.
19 With the system hot, check again for leaks,

rectifying where necessary. Drain the system while

it is hot to complete the flushing process. Refill and

vent (and pressurise if a sealed system) the system.
20 A suitable central heating system inhibitor must be

added to protect the system against the effect of

corrosion.
21 Close the front door panel (Kitchen models) or

replace the front panel (Utility models).

Note: After commissioning the boiler complete the
Commissioning Report on page 2 of these
instructions and the OFTEC CD/11 commissioning
report. Leave the top copy with the User and retain
the carbon copy.

If the boiler is to be left in service with the User, set the
controls, timer (If optional programmer is fitted, see
instructions supplied in kit) and room thermostat (if
fitted) to the User's requirements.

If the boiler is not to be handed over immediately,
close the boiler fuel supply valve and switch off the
electricity supply.

If there is any possibility of the boiler being left during
frost conditions, then the boiler and system should be
drained.

IMPORTANT NOTE:

To allow the boiler to be commissioned and serviced
correctly a combustion test point is provided on the front
cleaning door.

The CO2 and smoke test may all be carried out using this
test point. The test point is not suitable for measuring
boiler efficiency or conventional flue draught.

When using the test point on the cleaning cover note that
the flue gas temperature reading will be higher than that
measured in the flue thus resulting in an inaccurate
efficiency reading. To obtain an accurate flue gas
temperature and efficiency, the reading can only be
measured outside through the low level flue terminal. For
high level and vertical balanced flues the reading may be
taken from the flue kit test point provided . Refer to
Section 3.3.

For Conventional flue draught measurement and
efficiency a test point is provided in the conventional flue
adaptor.

36

Grant Vortex Oil Boilers

Important notes prior to servicing

8.1

The User must be advised (and demonstrated if
necessary) of the following important points:-

1 How to light and turn off the boiler and how to

operate the system controls.

2 The precautions necessary to prevent damage to

the central heating system and to the building, in
the event of the boiler not being in operation
during frost conditions.

3 The importance of servicing the boiler to ensure

safe and efficient operation. This should normally

only be required once a year.
4 The type of fuel used.
5 That any servicing or replacement of parts must

only be carried out by a suitably qualified engineer.

3 Ensure that all water/fuel system connections and

fittings are sound. Remake any joints and check the
tightness of any fittings that may be leaking.

If the boiler is used on a sealed central heating
system, check the system pressure, check the
operation of the pressure relief valve and check the
expansion vessel air charge. See Section 5.6.

Refill, vent and re-pressurise the system as
necessary. See Section 5.11

4 Check that any ventilation openings are adequate

and are clear. See Section 4.7.

5 Remove any sludge/water from the fuel tank by

opening the sludge valve at the lower end of the tank.

6 With the fuel supply valve closed, clean/replace the

filter element and clean the filter bowl.

7 Flexible fuel supply pipes should be inspected

annually when the boiler is serviced and replaced
every two years. If in doubt replace the pipes.

Warning: Before servicing, set the boiler On/Off
switch to Off, isolate the electricity supply and close
the fuel supply valve. Allow the boiler to cool.
The data label on the inside of the case side panel will
indicate the fuel used and the nozzle fitted.

To ensure efficient operation of the boiler it is
recommended that it is checked and serviced as
necessary at regular intervals. The frequency of
servicing will depend upon the particular installation
conditions and usage, but in general once per year
should be adequate.

Servicing and replacement of parts must only be
carried out by a suitably qualified engineer.

Important: Details of every service should be
entered in the Service Log, in the Boiler Handbook.
This information may be required to validate the
Grant extended warranty.

IMPORTANT

Before starting any work on the boiler, or fuel supply
please read the health and safety information given in
Section 12 on page 47.

1 Check the flue terminal and ensure it is not blocked

or damaged.
2 Run the boiler and check the operation of its

controls.

7 - INFORMATION FOR THE USER

8 - BOILER SERVICING

6 Ensure that the boiler controls and room thermostat

(if fitted) are set to the User's requirements.

7 If the boiler is used on a sealed heating system, tell

the user the system pressure and show them the
position of the safety valve discharge pipe.

8 Show the User how to reset the overheat thermostat

and how to restart the boiler if it goes to 'Lock-out'.

Leave this Instruction manual with the User.

Ensure the User information pack is given to the
Householder.

37

Grant Vortex Oil Boilers

8 - BOILER SERVICING

Dismantling prior to servicing

8.2

Cleaning the boiler

8.3

1 Open the door (Kitchen models) or pull off the

front panel (Utility models).

2 On System models, carefully lift up and remove the

expansion vessel from the front of the boiler.
Place the vessel on the floor taking care not to

strain the flexible pipe.
3 Disconnect the flexible air tube from the burner.
4 Remove the burner fixing nut (top of mounting

flange) and withdraw the burner.

If required, disconnect the flexible oil pipe(s), use

a suitable container to prevent any oil spillage.

Note: If two flexible pipes are connected to the

burner, identify (mark if necessary) which is the

inlet and return if they are to be disconnected.

1 Remove the nuts and washers securing the front

cleaning door and withdraw the door. Take care - it

is heavy.
2 Remove the baffles as shown in Fig. 24, 25 or 26.
3 Remove all deposits from the baffle plates and all

the boiler internal surfaces using a stiff brush and

scraper if necessary.
4 Check the condition of the flue, clean as necessary.
5 Check the condition of the front cleaning door seal,

replace if necessary.
6 Replace the baffles, ensuring they are correctly

fitted. See Fig. 24, 25 or 26.
7 Pull out the spiral turbulators from the heat

exchanger tubes. See Fig. 26.

Clean the turbulators using a stiff brush

Test the heat exchanger condensate drain by pouring

water into one of the lower tubes and observe whether

the water discharges from the 22 mm condensate

outlet. Replace the turbulators.
8 Replace the front cleaning door, ensuring the seal

is in good condition and secure it in position with

the nuts and washers previously removed. Tighten

to form a seal.
9 Remove the condensate trap and check that it is not

blocked and is operating correctly, i.e. the float is

free to move. Clean the trap and float as required.

10 Check that the boiler condensate outlet is

unobstructed. Clean if necessary.

IMPORTANT: The condensate trap and condensate
outlet must be checked on every service and cleaned as
necessary.

Fig. 24 - 15/26 baffles

Fig. 25 - 26/36 and 36/46 baffles

Right
baffles

Left
baffles

Top set

Bottom set

38

Grant Vortex Oil Boilers

Fig. 27

4 ± 0.3 mm

3 to 3.5 mm

Clamp screw

Cleaning the burner

8.4

8 - BOILER SERVICING

Fig. 26 - 46/58 and 58/70 baffles and turbulators (all models)

15/26, 26/36, 36/46 models - See Section 11.1

1 Combustion head - Loosen the two screws

securing the combustion head and withdraw the
head. Clean and refit the combustion head.

2 Inspect the ignition electrodes - Remove the

combustion head.
Loosen the electrode clamp screw and withdraw

the electrode assembly. Wipe clean and check for
any cracks in the ceramic insulation. Replace if
necessary.

Check the electrode settings

Electrode tips approximately 4 mm apart and 3 to

3.5 mm in front of the nozzle, see Fig 26.

3 Nozzle - The nozzle should be replaced on an

annual service - Check that the nozzle size and type
are correct, refer to table in Section 3.3 and boiler
data label.

With the combustion head removed, loosen the
electrode assembly clamp screw and slide the
electrodes away from the nozzle.

Do NOT attempt to clean the nozzle.
Remove the nozzle using a good fitting spanner

(16 mm). The use of an ill-fitting spanner will
damage the nozzle and could lead to an incorrect
flame pattern. Always check the electrode
settings after replacing the nozzle, see Fig. 27.

46/58 or 58/70 models - See Section 11.2 and Fig. 28
1 Combustion head - Loosen the two screws

securing the combustion head (NOT the screws in
the slotted ring, Fig. 30) and withdraw the head.
Clean and refit the combustion head.

2 Inspect the ignition electrodes - Remove the

combustion head.
Loosen the electrode clamp screw, disconnect the

leads and withdraw the electrode assembly. Wipe
clean and check for any cracks in the ceramic
insulation. Replace if necessary.

3 Check the electrode and diffuser settings - Fig. 29

To adjust the diffuser disc: Loosen the diffuser clamp
screw and slide the disc along the nozzle holder to
achieve the gap 'A' in Fig. 29, tighten the screw.

To adjust the electrodes: Loosen the electrode
clamp screw and move the electrode unit to achieve
the gap 'B' in Fig. 29, tighten the screw.

IMPORTANT: The electrode settings given above
MUST be observed

58/70 shown

Top baffle

Bottom baffle

IMPORTANT:

The ends of the
turbulators must
be vertical

Position in vertical plane

39

Grant Vortex Oil Boilers

8 - BOILER SERVICING

Fig. 28

Combustion

head

Combustion head

fixing screw
Electrode clamp
screw

Electrode
leads

Nozzle
holder

Diffuser clamp
screw

Burner
flange

Fig. 29

Fig. 30

0

Screw

Slotted ring

Screw Combustion

head

Combustion
head fixing
screw

A

B

Electrode clamp screw

5.75

0

-0.2

3

+0.5

0

Diffuser clamp screw

4.0

+0.5

7.5

+0.7

- 0.5

_

B

A

Diffuser disc

4 The combustion head position is adjustable on the

46/58 and 58/70 burners. Check that it is fully
closed (position 0), or the 4th line if the 58/70 has
been set to maximum output (70 kW).

To adjust the head setting, refer to Fig. 30 and
proceed as follows: Loosen the two screws in the
slotted ring - NOT the two fixing screws, and turn
the blast tube until '0' lines up with the edge of the
slotted ring. Tighten the two screws.

All models

1 Photocell - The photocell is a push-fit in the burner

body. Carefully pull out the photocell to clean.

2 Burner fan - With the air intake grille or spigot

removed, remove the screws securing the fan
housing cover (R/H side of burner) and remove the
cover. Inspect the fan and housing and clean as
necessary. Replace the cover.

3 Pump filter - With the burner cover removed,

remove the four screws securing the pump end
cover. Remove the filter and wash in kerosene.
Replace the filter and end cover, ensure the 'O' ring
is in position.

Re-assemble in reverse order.

To ensure safe and efficient operation of the boiler
it is important that re-commissioning is carried out,
especially combustion checks (CO2 level, flue gas
temperature and smoke number) after the boiler
has been serviced.

Refer to the Commissioning instructions starting on
page 34.

40

Grant Vortex Oil Boilers

9 - WIRING DIAGRAMS

Fig. 31

Control panel wiring diagram - Kitchen models

9.1

Control panel wiring diagram - Kitchen System models

9.2

Fig. 32

Colour code: Br - Brown, R - Red, Bl - Blue, Y - Yellow, G/Y - Green/Yellow, Blk - Black

1234

5678910

11 12

LNE ENL

HW

ON

HW

OFF

CH

BOILER

FEED

123456

1

C

C

2

Control

Thermostat

Limit

Thermostat

Heating

"ON"

Neon

(Green)

On/Off
Switch

Chassis Earth To

Main Casing

NL

CH

OFF

CH
ON

HW
OFFHWON

Optional:

Grant Electronic

7-day Plug-in Programmer

6-way Plug and
Socket Connector

L

E

N

Burner

Mains Supply:

Use 2 pole isolator
with power "ON" indicator

E
N
L

G/Y

Bl

Br

G/Y

Bl

Br

R

R

R

R

R

Br

G/Y

G/Y

R

R

R

Bl

Bl

Y

R

Bl

Bl

Br

Br Bl YBrR

G/Y

G/Y

4B

5B

1A

2A

Blk

Burner

Lock-out

Neon (Red)

Mains "ON"

Neon

(Green)

Overheat

Thermostat

123456

Neon

(Green)

Note: Remove both links
if plug-in programmer is fitted

41

Grant Vortex Oil Boilers

9 - WIRING DIAGRAMS

Utility boiler control panel wiring diagram

9.3

Fig. 33 - Utility boiler

Fig. 34 - Utility System boiler

Utility System boiler control panel wiring diagram

9.4

42

Grant Vortex Oil Boilers

Fig. 36

Kitchen models with Honeywell S Plan (HW & CH controlled by two valves)

Typical control system wiring diagram (Kitchen models)

9.6

9 - WIRING DIAGRAMS

Fig. 35

Utility models with Honeywell Y Plan (HW controlled by mid position valve)

Typical control system wiring diagrams (Utility and Utility System models)

9.5

43

Grant Vortex Oil Boilers

10 - FAULT FINDING

Burner fault finding

10.1

Motor/pump

seized

or tight

Replace

motor

capacitor

Burner

motor runs

Check L & N

to control

box

Check

boiler

controls

Motor gives

50 Volts

to white wire

*

Replace

burner

motor

Repair

or replace

motor/pump

Lockout

after 12 sec

purge

Lockout

within

1 second

Replace

solenoid

coil

Coil of

solenoid

sound **

Repair or

replace

oil pump

Washing

pressure

1to2bar

Photocell

sound ***

If balanced flue,

remove air tube

and retest

Reseal

balanced flue

or reposition flue

Replace

photocell

Drive

coupling

broken

Pump

produces

pressure

Replace

nozzle

Contaminated

fuel or

filter

Combustion

air set

Flame off

and

relights

Boiler or

flue

blocked

Combustion

head set

YES

NO

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

NO

YES

NO

NO

NO

Check and

set the

electrodes

Replace

the

control box

Ignition

spark

proved

NO

NO

NO

NO

NO

OK

NO

NO

NO

NO

Solenoid

valve

operating

Replace

control

box

Check oil

pressure

regulator

Replace coil

and/or

stem valve

Nozzle

atomising

fuel

NO

YES

NO

NO

Notes

*

**

***

Motor white wire returns 50 - 53 V AC

to control box.

Test solenoid coil for continuity or 100

ohms.

Test photocell by disconnecting it in

control box. If burner fires and then

goes to lockout, photocell should be

replaced.

It is best to replace the photocell if it is

suspect.

Burners on balanced flue systems can

recirculate flue products causing

burner recycling. If this happens,

check flue position and sealing.

44

Grant Vortex Oil Boilers

10 - FAULT FINDING

Warning: Always isolate the electricity supply to the boiler before working on the boiler.

Ensure that an adequate supply of fuel is available and that the fuel supply valve
is open.
Check the condition of the fuel filter, clean if necessary.
Ensure fuel supply is reaching burner and vent pump.

Ensure electricity supply to the boiler is switched on and that all controls are calling
for heat.
Ensure that the overheat thermostat has not tripped, reset if necessary.
Check that a mains supply is present at the burner terminal block. If not, check the
boiler and overheat thermostat.

Press the reset button on the burner control box if it is lit.
Refer to burner fault finding flow diagram.

If the flame is unstable, check the combustion settings.
Refer to burner fault finding flow diagram.

Insufficient air supply - check the air damper setting and the condition of the fan.
Check room ventilation is adequate, see Section 4.6.
Check the nozzle size and type.
Fuel pressure may be too high - check and adjust.

Insufficient air supply - check the air damper setting and the condition of the fan.
Check room ventilation is adequate, see Section 4.6.
Check the nozzle size and type.

Insufficient air supply - check the air damper setting and the condition of the fan.
Check room ventilation is adequate, see Section 4.6.
Check the nozzle size and type.
Fuel pressure may be too low - check and adjust.
Insufficient draught - clean boiler heat exchanger and check condition of flue.

Undersize nozzle and/or low fuel pressure.
Check condition of boiler heat exchanger and clean if necessary.
Check the boiler thermostat.
Check the combustion settings.
Check the condition of the fuel filter.

Faulty boiler thermostat.

Check the condition of the chimney, ensure it is not blocked and is high enough
to produce the required draught.
Check that there is an adequate air supply near the burner and that a kitchen fan
is not drawing products out of the burner.

Check all fuel line connections, remake as necessary.

Check boiler cleaning cover and seal are correctly fitted.
Check burner is correctly fitted onto flange.
Check flue is correctly sealed into flue outlet of boiler.
Check the condensate pipe and trap are operating correctly.

Faults Remedies

Boiler will not start

1 No fuel supply.

2 No electricity supply.

3 Burner not starting - fuel and

electricity supplies present.

4 Burner lights but goes to 'lock-out'.

Boiler works but:-

5 Visible smoke from flue or high

smoke number.

6 Burner pulsates.

7 Flame slow to stabilise during start up.

8 Water temperature low.

9 Boiler operating on overheat

thermostat.

10 Fumes and puffing during starting

(conventional flue).

11 Oil odours.

12 Combustion fumes smell.

Boiler fault finding

10.2

45

Grant Vortex Oil Boilers

11 - BURNER SPARE PARTS

Riello RDB1, 2, 2.2 burner - exploded view

11.1

1 Not applicable - ­2 Flange 3005786 RBS119
3 Combustion head T1 - 15, 20 3002507 RBS146
3 Combustion head T2 - 15/26 3002423 RBS147
3 Combustion head T3 - 26/36 3002447 RBS144
3 Combustion head T5 - 36/46 3002533 RBS150
4 Electrode assembly 3007513 RBS108
5 Electrode bracket 3006552 RBS29
6 Nozzle holder 3008642 RBS111
7 Collar 3008643 RBS112
8 High voltage lead 3008794 RBS129
9 Air damper assembly 3008647 RBS116
10 Fan - 15/26 3005708 RBS39
10 Fan - 26/36 3008645 RBS142
10 Fan - 36/46 3005788 RBS151
11 Photocell 3008646 RBS115
12 Capacitor 4.5 µF 3002837 RBS149
13 Seal kit 3008878 RBS140

Key

No.

Description Riello

Part No.

Grant

Part No.

Key
No.

Description Riello

Part No.

Grant

Part No.

14 Needle valve 3007582 RBS109
15 Regulator 3008651 RBS120
16 Pump seal 3000439 RBS14
17 Pump 3008654 RBS101
18 'O' ring 3007162 RBS08
19 Filter - 'O' ring 3008653 RBS122
20 Connector 3003602 RBS35
21 Flexible pipe 3007672 RBS36
22 Tube 3008644 RBS113
23 Pressure gauge connector 3008876 RBS138
24 Drive coupling 3000443 RBS16
25 Solenoid 3008648 RBS117
26 Motor RBS102 3002836 RBS102
27 Cover 3008649 RBS118
28 Control box assembly 3008652 RBS103
29 Solenoid lead 3008851 RBS139
30 Cover 3008879 RBS141
31 Air tube spigot 3062774 RBS143

Burner head identification

46

Grant Vortex Oil Boilers

11 - BURNER SPARE PARTS

Riello RDB3.2 burner - exploded view

11.2

1 Flange 3008637 RBS153
2 Combustion head 3002572 RBS163
3 Diffuser disc assembly RBS154
4 Nozzle holder 3002570 RBS164
5 High voltage lead 3008794 RBS129
6 Collar 3008957 RBS165
7 Seal kit 3008963 RBS156
8 Air damper assembly 3008839 RBS166
9 Insulation 3008958 RBS157
10 Fan 3005799 RBS162
11 Photocell 3008646 RBS115
12 Cover 3008962 RBS168
13 Electrode 3020121 RBS158
14 Capacitor 5 µF 3008960 RBS167
15 Connector 3003602 RBS35

Key

No.

Description Riello

Part No.

Grant

Part No.

Key

No.

Description Riello

Part No.

Grant

Part No.

16 Flexible pipe 3005720 RBS36
17 Motor 3008964 RBS159
18 Pressure gauge connector 3008876 RBS138
19 Tube 3008961 RBS160
20 Drive coupling 3000443 RBS16
21 Solenoid 3008648 RBS117
22 Solenoid lead 3008851 RBS139
23 Pump 3008654 RBS101
24 Pump seal 3000439 RBS14
25 Filter - 'O' ring 3008653 RBS122
26 Regulator 3008651 RBS120
27 Needle valve 3007582 RBS109
28 Control box assembly 3008652 RBS103
29 Cover 3008649 RBS118

47

Grant Vortex Oil Boilers

12 - 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.
The following other materials are present in the product:

Insulation materials

Material Types: Ceramic fibre board, mineral wool.
Description: Rigid board, slabs, sleeves, gaskets, ropes.
Known Hazards: May cause temporary irritation or rash to skin. High dust levels may irritate eyes and upper

respiratory system.

Precautions: Avoid unnecessary or rough handling, or harsh abrasion of boards. Normal handling and use of

material should not produce high dust levels.
Avoid inhalation, and contact with skin and eyes.
After handling always follow normal good hygiene practices.

Protection: Use disposable gloves, face mask and eye protection.
First Aid: Eyes - If irritation occurs, wash eyes with copious amounts of water. If symptoms persist, seek

immediate medical advice.
Skin - If irritation occurs, wash under running water before washing with soap and water.
Inhalation - Remove to fresh air, drink water to clear throat and blow nose to remove dust/fibres.
Ingestion - Drink plenty of water.

Sealants

Material Types: Silicone elastomer.
Description: Sealant and adhesive.
Known Hazards: Irritation to eyes.
Precautions: Avoid inhalation of vapour, contact with eyes and prolonged or repeated contact with skin.

After handling always follow normal good hygiene practices.

Protection: Use eye protection. Rubber or plastic gloves should be worn where repeated contact occurs and a

face mask worn when working in confined spaces.

First Aid: Eyes - Flush eyes with water for 15 minutes. Seek immediate medical attention.

Skin - Wipe off and wash with soap and water.
Inhalation - Remove to fresh air.

Kerosene and Gas oil fuels (Mineral oils)

Known Hazards: The effect of mineral oils on the skin vary according to the duration of exposure and the type of oil.

The lighter fractions remove the protective grease naturally present on the skin, leaving it dry, liable
to crack and more prone to damage by cuts, abrasions and irritant chemicals.
Skin rashes (Oil acne) most often on arms, but also on any part of the body in contact with oil or
oily clothing.
Contact with fuel oils can cause dermatitis.

Precautions: Avoid as far as possible any skin contact with mineral oil or with clothing contaminated with

mineral oil.
The use of a lanolin-based barrier cream is recommended, in conjunction with regular washing with
soap and rinsing with water to ensure all oil is removed from the skin.
Take care to prevent clothing, especially underwear, from becoming contaminated with oil.
Do not put oily rags or tools in pockets, especially trouser pockets.
Have first-aid treatment at once for an injury, however slight.
Do not inhale any vapours from mineral oils.

We declare that the Grant Vortex range of Oil Boilers equipped with Riello RDB burners approved to
EN 267: 1991 satisfy the requirements of the following European Directives:-

1. 89/336/EEC - Electromagnetic Compatibility Directive
Referred to the generic standards EN 55014: 1993, EN 50082: 1: 1992

2. 73/23/EEC - Electrical Equipment Safety Regulations Directive
Referred to the generic standard NO: 3260: The Electrical Equipment (Safety) Regulations: 1994

3. 92/42/EEC - Hot Water Boiler Efficiency Directive
Referred to the generic standard The Boiler (Efficiency) (Amendment) Regulations 1994
(SI 1994/3083)

Complies with the EC Low voltage,
Electromagnetic compatibility and
Boiler efficiency Directives

89/336/EEC
73/23/EEC
92/42/EEC

This manual is accurate at the date of printing but will be superseded and should be disregarded if specifications and/or appearances are
changed in the interests of continued product improvement.

All goods sold are subject to our official Conditions of Sale, a copy of which may be obtained on application.
© Grant Engineering (UK) Limited 2006. No part of this manual may be reproduced by any means without prior written consent.

Manual compiled and designed by Publications 2000 Tel: [phone]

D202

Grant Engineering (UK) Limited

Hopton House, Hopton Industrial Estate, Devizes, Wiltshire SN10 2EU

Telephone: [phone] Fax: [phone]

email: [e-mail] website: www.grantuk.com

13 - EC DECLARATION OF CONFORMITY