Page 1
USER, INSTALLATION
and
SERVICING INSTRUCTIONS
GRANT VORTEX
Condensing Oil Boiler range
For use with Kerosene only
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
Part No. DOC 52 Rev. 00 October 2004
Outdoor Modules
with outputs up to 46 kW
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2
Grant Vortex Outdoor Module
Subject PageSection
1 Introduction.............................................. 3
2 User instructions ...................................... 4
3 Boiler technical information .................... 7
4 General boiler information....................... 10
5 Boiler installation..................................... 20
6 Commissioning......................................... 27
7 Information for the user ........................... 29
8 Boiler servicing ........................................ 30
9 Wiring diagrams....................................... 33
10 Fault finding ............................................. 35
11 Boiler spares ............................................ 37
12 Burner spares ........................................... 38
13 Health and safety information.................. 39
14 EC declaration of conformity .................. 40
Date % CO2Net flue gas
temp.
Smoke No. Service engineer/Tel. No.
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 below by the
service engineer.
COMMISSIONING REPORT
SERVICE LOG
LIST OF CONTENTS
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Grant Vortex Outdoor Module
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 80° C.
1 - INTRODUCTION
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.
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Grant Vortex Outdoor Module
2 - USER INSTRUCTIONS
The boiler will provide domestic hot water and central
heating and is fully automatic once switched on. An
illuminated On/Off switch, see Fig. A, is fitted to the
Outdoor modules, which lights when the boiler is switched
on, but does not necessarily indicate the burner is firing.
To access the Outdoor module controls, remove the front
panel by turning the handle and withdrawing it forwards
at the bottom.
Controls for Outdoor modules - Fig. A
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 neon in the switch is not alight). The Test
switch is set to Off. The room thermostat (if fitted) is
at the desired setting. The boiler thermostat is set to
the required setting.
2 Switch on the electricity supply to the boiler.
3 Set the Boiler On/Off switch to on. A neon in the
switch lights when it is in the on position.
The boiler will now light automatically.
About your boiler
2.1
Boiler controls (see Fig. A)
2.2
Lighting your boiler (see Fig. A)
2.3
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Grant Vortex Outdoor Module
For short periods - Set the boiler switch to OFF.
To restart, set the switch to ON.
For long periods - Set the boiler switch to OFF. If
required, the fuel supply valve may be closed and the
water and electricity supplies turned off at the mains.
Note: If the electricity, fuel and water supplies are
turned off, the built-in frost thermostat will not
operate.
1 Check that the boiler switch is ON.
2 Check that any remote 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 is lit. If it
is, press it to start the burner. If the burner fails to light
and goes to 'Lock-out' again, check that you have
sufficient fuel in the storage tank and that the fuel
supply valve is open.
5 Ensure that a fuse has not blown or that the
electricity supply has not failed.
6 Check to see if the 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.
The Vortex Outdoor modules operate on Class C2
Kerosene only. You should always quote the type of fuel
you require 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.
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.
The boiler thermostat has an operating range of 65
to 80°C. The following settings are recommended:-
a Heating and hot water in Winter 75°C
b Hot water only in Summer 65°C
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 will light. Usually such malfunctions are
short lived and pressing the reset button will
restore normal operation.
If the burner continually goes to 'Lock-out' a fault
exists or the fuel supply is low. If you have
sufficient fuel, you will need to call your Service
engineer.
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.
If your boiler goes off and you try to light it but
nothing happens and the 'Lock-out' reset button on
the burner is not lit, the overheat thermostat has
probably operated. The boiler will not light until
the thermostat is reset. To reset, unscrew the small
plastic cap (see Fig. A), press the button then
replace the cap.
If this condition continually repeats, contact your
Service engineer.
4 Ventilation - Always ensure that the boiler has
adequate ventilation. Any ventilation openings
must not be obstructed. Periodically check that
they are clear.
Do not attempt to 'box in' the boiler or build a
compartment around.
Do not place any combustible material around or
on the boiler or flue pipe.
Do not place anything against the door of the
Outdoor modules that might obstruct the
ventilation openings.
2 - USER INSTRUCTIONS
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
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Grant Vortex Outdoor Module
6 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.
The control panel of the Outdoor modules includes
a built-in frost thermostat factory set to 5°C.
Note: For Vortex Outdoor modules we recommend
that a combined antifreeze and corrosion inhibitor
be used in the primary water system.
7 Cleaning and servicing - Lightly wipe over the
case with a damp cloth and a little detergent. Do
not use abrasive pads or cleaners.
You should have your boiler serviced at least once
a year to ensure safe and efficient operation.
Contact your Service engineer for further details.
Warning note - External equipment operated at
230 volts should not be serviced or repaired
under adverse weather conditions.
8 Failure of electricity supply - If the electricity
supply fails, the boiler will not operate. It should
relight automatically 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 0.8 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.
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. Repressurise 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.
4 Vent each radiator in turn, starting with the lowest
one in the system, to remove air.
7 Continue to fill the system until the pressure gauge
indicates 1.0 bar. Close the fill point valve.
9 Close the valves either side of the filling loop and
disconnect the loop.
2 - USER INSTRUCTIONS
Electricity supply
2.8
Sealed central heating system
2.9
Sealed system filling loop arrangement - Fig. B
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Grant Vortex Outdoor Module
22 mm 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
90 W max.
2.6 Amp
0.85 Amp
¼" BSP Male (on end of flexible fuel line)
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
Condensate connection
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
Starting current
Running current
Oil connection
Max operating press - sealed sys
Max operating press - open sys
* Weight includes burner but excludes flue.
Vortex Outdoor Module
All Heating Return connections are in stainless steel pipe - compression fittings must be used.
36/46
21
4.7
174
384
46
157 000
28 mm
28 mm
26.0 mbar
9.5 mbar
15/26
19
4.2
157
346
26
88 700
22 mm
22 mm
28.5 mbar
10.0 mbar
26/36
21
4.7
174
384
36
122 840
28 mm
28 mm
26.0 mbar
9.5 mbar
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Grant Vortex Outdoor Module
3 - BOILER TECHNICAL INFORMATION
Note: Grant Vortex boilers are only for use with kerosene.
Grant Vortex oil boilers using Class C2 kerosene
3.3
Heating system pressure (cold)
Operating pressure of pressure relief valve
Expansion vessel size (15/26)
Expansion vessel size (26,36 and 36/46)
Max heating system volume (including boiler) (15/26)
Max heating system volume (including boiler) (26/36 and 36/46)
Cold water mains connection
Pressure relief valve discharge connection
Circulating pump (15/26)
Circulating pump (26/36 and 36/46)
Maximum 1.0 bar, Minimum 0.5 bar
2.5 bar
12 litres (pre-charged at 1 bar)
16 litres (pre-charged at 1 bar)
75 litres (approximately)
120 litres (approximately)
15 mm copper pipe
15 mm copper pipe
6 m Head
7 m Head
Sealed system data
3.2
Notes:
1 The data given above is approximate only.
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 * Net thermal efficiency.
5 The net flue gas temperatures given above are ± 10%.
6 When commissioning the air damper must be adjusted to obtain the correct CO2 level.
7 ** Factory settings: 15/26 - 23 kW, 26/36 - 31.5 kW, 36/46 - 41.5 kW.
8 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.
9 When setting the 15/26 to 15 or 20 kW the combustion head must be changed.
Flue gas analysis
To allow the boiler to be commissioned and serviced, the boiler is supplied with a combustion test point on the front
cleaning door. When this test point is used please note the following:
1. The test point is for CO2 and smoke readings only.
2. The boiler efficiency and temperature must be taken from the flue test point on high level and vertical flue adaptors.
3. Low level flues do not contain a test point. The temperature and efficiency readings must be taken from the flue terminal.
(kW)
15.0
20.0
23.0
26.0
26.0
31.5
36.0
36.0
41.5
46.0
(Btu/h)
51 180
68 240
78 475
88 700
88 700
107 500
123 000
123 000
142 000
157 000
100.4
101.0
101.0
101.5
101.5
101.5
101.5
101.5
98.5
97.0
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
Oil
press.
(bar)
7.0
8.0
8.5
8.0
8.0
9.0
9.1
9.0
8.0
8.0
Smoke
No.
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
2.18
2.18
2.57
3.01
3.01
3.56
3.90
Flue gas
temp.
(°C)
60 - 65
65 - 70
70 - 75
68
68
70
78
78
80
88
CO
2
(%)
12.0
12.0
12.0
12.0
12.0
12.0
12.0
12.0
12.0
12.0
Burner
head
T1
T1
T2
T2
T3
T3
T3
T3
T5
T5
Heat Output
Net
eff *
(%)
15/26
26/36
36/46
Model
**
**
**
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Grant Vortex Outdoor Module
3 - BOILER TECHNICAL INFORMATION
Boiler dimensions
3.4
Fig 1a - 15/26 dimensions
Fig 1b - 26/36 and 36/46 dimensions
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Grant Vortex Outdoor Module
The Vortex Outdoor Modules have an insulated
weatherproof enclosure made of galvanised steel with
a powder coated finish, and are designed for external
installation, either against a wall or free standing some
distance away from the property, as required.
The Vortex Outdoor modules are part of the Grant 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.
All models are supplied with the control panel and
burner factory fitted.
The factory fitted low level discharge flue system can
be adjusted on site for either rear, left hand or right
hand flue outlet position, as required.
A conventional flue (Green) system is also available
from Grant UK. Refer to Section 5.3 for further details.
Green system......Standard external high level/
vertical flue starter elbow with test point components available:
Extensions 150 mm, 250 mm, 450 mm, 950 mm
and adjustable 195 to 270 mm
45° elbow
High level terminal
Vertical terminal
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 and 3/8" to 1/4"
BSP male adaptor are available from Grant Engineering
(UK) Limited, for two-pipe oil supply systems.
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
Boiler description
4.1
Boiler components
4.2
4 - GENERAL BOILER INFORMATION
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:-
OFS T100 Polythene oil storage tanks for
distillate fuels.
OFS T200 Fuel oil storage tanks and tank
bunds for use with distillate fuels,
lubrication oils and waste oils.
Further information may be obtained from the
OFTEC Technical Information Book 3
(Installation requirements for oil fired boilers
and oil storage tanks).
The installation should also be in accordance with the
latest edition of the following British Standard Codes
of Practice:-
BS 715 Metal flue pipes, fittings, terminals
and accessories.
BS 799:5 Oil storage tanks.
BS 1181 Clay flue linings and flue terminals.
BS 4543:3 Factory made insulated chimneys for
oil fired appliances.
BS 4876 Performance requirements for oil
burning appliances.
BS 5410:1 Code of Practice for oil firing appliances.
BS 5449 Forced circulation hot water systems.
BS 7593 Code of Practice for treatment of
water in heating systems.
BS 7671 Requirements for electrical
installations, IEE Wiring Regulations.
Failure to install and commission appliances
correctly may invalidate the boiler warranty.
IMPORTANT
Before starting any work on the boiler, or fuel supply
please read the health and safety information given in
Section 13 on page 39.
Regulations to comply with
4.3
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Grant Vortex Outdoor Module
4 - GENERAL BOILER INFORMATION
4 A metal bowl type filter with a replaceable
micronic filter must be fitted in the fuel supply line.
A shut-off valve should be fitted before the filter,
to allow the filter to be serviced.
5 A flexible fuel line, adaptor and 1/4" BSP isolation
valve are supplied loose with the boiler for the
final connection to the burner. If a two pipe system
or Tiger Loop system is used, an additional flexible
fuel line and 3/8" to 1/4" BSP male adaptor are
available from Grant Engineering (UK) Limited.
6 Flexible pipes should be inspected annually when
the boiler is serviced and replaced every two years.
4.4.3 Single pipe system - (See Fig. 2)
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.
4.4.1 Fuel storage
The tank should be positioned in accordance with the
recommendations given in BS 5410:1:1997, which gives
details of filling, maintenance and protection from fire.
A galvanised tank must not be used.
A plastic tank may be used and must comply with
OFS T100.
Note: Plastic tanks should be adequately and
uniformly supported on a smooth level surface, across
their entire base area.
4.4.2 Fuel pipes
1 Fuel supply pipes should be of copper tubing with
an internal diameter of at least 8 mm.
Galvanised pipe must not be used.
2 Flexible pipes must not be used outside the boiler case.
3 A remote sensing fire valve must be installed in the
fuel supply line, with the sensing head located above
the burner. Recommendations are given in BS
5410:1:1997.
Fuel supply
4.4
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 - Single pipe system
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Grant Vortex Outdoor Module
4.4.5 Tiger Loop system - (See Figs. 4 and 5)
1 When The storage tank is below the burner, an
alternative to a two pipe system can be achieved using
the Tiger Loop oil deaerator. This effectively removes
the air from the oil supply on a single pipe lift.
2 The Tiger Loop is connected close to the boiler as
a two pipe system (omitting the non-return valve)
as shown in Fig. 4. Refer to the manufacturers
instructions supplied with the Tiger Loop.
The Tiger Loop must be mounted vertically.
3 To be used with a Tiger Loop system, the burner
must be fitted with an additional flexible fuel line.
See Section 4.4.6.
Flexible fuel lines and adaptors are available from
Grant Engineering (UK) Ltd.
4.4.4 Two pipe system - (See Fig. 3)
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. 3. 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 and 3/8" to 1/4" BSP male
adaptor are available from Grant Engineering (UK)
Limited). 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
4 - GENERAL BOILER INFORMATION
Fig. 3 - Two pipe system
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Grant Vortex Outdoor Module
4 - GENERAL BOILER INFORMATION
4.4.6 Two pipe oil supplies
Riello RDB burner - See Fig. 6
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. 6) into the tapping in the return port.
2 The By-pass screw is supplied in the boiler
accessory pack.
3 Remove the plastic burner cover (two screws).
4 Remove and discard the blanking plug from the
return connection of the pump and fit the By-pass
screw using an hexagonal key.
5 Connect the return oil flexible fuel line to the pump.
6 Connect the 3/8" to 1/4" BSP adaptor to the flexible
fuel line.
7 Flexible fuel lines and adaptors are available from
Grant Engineering (UK) Ltd.
Fig. 4 - Tiger loop system
1/4" BSP female
connections
Tiger Loop
SUPPLY
TO PUMP
RETURN
FROM PUMP
SUPPLY
FROM TANK
Fig. 5 - Tiger loop
Fig. 6 - 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
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Grant Vortex Outdoor Module
See Fig. 6
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 underside of the
side casing panels.
1 A 230/240 V ~ 50 Hz mains supply is required.
The boiler must be earthed.
2 The electrical supply to the boiler and control
system should be fed from a single separate 5 Amp
circuit breaker with earth leakage protection,
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 external to the boiler must be in
accordance with the current I.E.E. Wiring Regulations.
6 Any room thermostat or frost thermostat used must
be suitable for use on mains voltage.
7 The boiler requires a permanent mains supply, do
not interrupt it with any external time control.
8 In the event of an electrical fault after installation
of the boiler, the following electrical system checks
must be carried out:- Short circuit, Polarity, Earth
continuity and Resistance to earth.
1 Outdoor Modules are supplied with a factory fitted
frost protection thermostat, located inside the
boiler control panel. This is pre-wired to the boiler
electrical system and factory set to 5°C.
2 For total system protection against freezing,
particularly during extended periods without
electrical power, Grant recommend the use of a
combined heating system antifreeze and corrosion
inhibitor, used in accordance with the
manufacturer's instructions.
4 - GENERAL BOILER INFORMATION
1 The Outdoor Module must stand on a solid, level
surface capable of supporting the weight of the boiler
when full of water, e.g. a prepared concrete standing,
paving slabs bedded down on sand/cement, or similar.
2 The Module can be installed either against the
building or 'free standing' some distance away from
the building.
3 The Module must be positioned such that the
required clearances from the low level flue outlet,
as shown in Fig. 7, are achieved.
4 Adequate clearance must be left around the
Module for servicing. In particular, a minimum
clearance of 600 mm above the Module for
removal of the top panel and 600 mm at the
opposite end to the flue outlet for access to the
burner.
5 The flue terminal must be a minimum distance of
1.8 m from an oil storage tank.
The flue terminal should be positioned so as to
avoid products of combustion accumulating in
stagnant pockets around the building or entering
into buildings.
General - Grant boilers are compatible with both
copper and plastic pipe. Where plastic pipe is used it
must be of an oxygen barrier type. The first metre of
pipe connected to the boiler must be made in copper.
Sealed systems - Where a sealed heating system is
fitted to the boiler only copper tube may be used.
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 the primary pipework between the boiler and
the underfloor mixing/blending valves.
Connect the fuel supply
4.5
Electricity supply
4.6
Frost protection
4.7
Boiler location
4.8
Pipework materials
4.9
Page 15
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Grant Vortex Outdoor Module
4 - GENERAL BOILER INFORMATION
Flue terminal locations
4.10
Fig. 7 - Flue terminal
positions
K
D
F
AJ
B
L
G
C
C
I
H
E
Distances measured to rim of terminal.
Clearances recommended by Grant
Engineering (UK) Limited in accordance with
British Standards and Building Regulations.
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.
Notes: * 75 mm with protection.
** 300 mm British Standards.
A Below gutters, eaves or balconies (with protection)
B Horizontally from a door, window or air vent
C Above ground, flat roof or balcony level
D Below gutters, eaves or balconies (without protection)
E From an external corner
F From a terminal facing the terminal
G From a surface facing the terminal
H Vertically from a terminal on the same wall
I Horizontally from a terminal on the same wall
J Directly below an opening, air brick, window, etc.
K From a vertical drain pipe or soil pipe
L From an internal corner
*600
600
**300
*600
300
1200
600
1500
750
600
300
300
Terminal position Min. distance
The minimum dimensions for positioning the flue
terminal are shown in Fig. 7.
The terminal should be positioned so as to avoid
products of combustion accumulating in
stagnant pockets around the building or
entering into buildings. Care should also be
taken that the plume from the condensed flue
gases does not cause a nuisance.
Page 16
16
Grant Vortex Outdoor Module
Flow connection - All models
A 22 mm (28 mm 26/36 and 36/46 models) Tectite
push-fit elbow connection is provided for the heating
flow. The flow and return pipework can exit the boiler
enclosure either through the openings provided in both
sides (under the movable cover plates) and through the
wall when installed against the building, or down and
through the openings provided in the base of the
enclosure for 'free standing' installations.
Return connection (see also Section 5.4) - All models have
a stainless steel pipe on the left hand side (when viewed from
the back) for the return connection - 22 mm for the 15/26
models or 28 mm for the 26/36 and 36/46 models.
Compression fittings must be used for the return connection.
All water connections have been temporarily sealed
with plastic caps to prevent any residual water (from
factory pressure testing) leaking from the boiler during
storage and transit. All the caps must be removed
before connecting any fittings.
Plug all unused connections.
Fit drain cocks in the central heating and domestic hot
water systems to allow the complete system to be fully
drained.
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.
4 - GENERAL BOILER INFORMATION
Water connections
4.11
Boiler components
4.12
Fig. 8 - Top view
Fig. 9 - Rear view
Page 17
17
Grant Vortex Outdoor Module
4 - GENERAL BOILER INFORMATION
See Fig. 10
Grant sealed system kits, incorporating circulating
pumps are available.
1 The boiler is only suitable for use with a sealed
system 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. 10. 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.
Sealed systems
4.13
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.
6 Provision should be made to replace water lost
from the system. This can be done manually. A
double check valve assembly must be used.
7 An automatic air vent should be fitted to the
highest point of the system.
8 All fittings used in the system must be able to
withstand pressures up to 3 bar.
9 Radiator valves must comply with the requirements
of BS 2767(10):1972.
10 One or more drain taps (to BS 2879) must be used
to allow the system to be completely drained.
11 For proprietary expansion vessel/valve/gauge
packs, refer to the manufacturers instructions for
the correct location on the heating system.
Fig. 10 - Sealed system
Page 18
18
Grant Vortex Outdoor Module
4 - GENERAL BOILER INFORMATION
See Fig. 11
On underfloor systems it is essential that the return is
pre-heated by mixing flow water into the return before
it enters the boiler. The return temperature must be
maintained above 40°C to prevent internal corrosion
of the boiler water jacket.
Fig. 11 - Underfloor system
Underfloor heating systems
4.14
Condensate disposal
4.15
The minimum diameter of the condensate drainage line
is 3/4". The drainage line may run into a soil stack or
waste pipe, an external gulley, hopper or soak-away,
see Fig. 13. Standard plastic overflow pipe (3/4" [19
mm] diameter) may be used to connect to the outlet of
the condensate trap.
It should be noted that the connection of a condensate
pipe to the drain may be subject to local building
control requirements.
Fig. 12 - Condensate trap
When in condensing mode the Grant Vortex boiler
produces condensate from the flue gases. Provision
must be made for the safe and effective removal of the
condensate. All Vortex boilers are supplied with a
float valve condensate trap (the float creates a seal
against flue gases), see Figs. 9 and 12, that
incorporates an overflow warning outlet. The bung
should be removed from the overflow outlet.
The trap must be located inside the casing in an
accessible position to allow for maintainance.
The mounting bracket (supplied) for the condensate
trap must be used.
The trap should be checked at regular intervals to ensure
that it is operating correctly and serviced at least annually.
If there is any discharge of condensate from the overflow
outlet, turn off the boiler and contact a service engineer.
The condensate drainage line must be of a suitable material
such as plastic.
Steel or copper must not be used.
Page 19
19
Grant Vortex Outdoor Module
4 - GENERAL BOILER INFORMATION
Fig. 13 - Purpose made condensate soakaway
Page 20
20
Grant Vortex Outdoor Module
1 Carefully remove the packaging from the boiler
and lift it off the pallet.
2 The flue terminal guard is supplied loose inside the
boiler.
3 Remove the case top panel (four screws).
4 The flue may exit the casing from the left, right or rear
of the casing. The casing has two removable blanking
panels and a flue exit panel. Fit the panel with the flue
exit hole and seal in the required position.
5 Slacken the wing nuts holding the flue elbow and
rotate the elbow to the required direction for the
flue to exit the casing.
6 Push the end of the flue terminal section with the
red seal through the seal in the casing. The terminal
has been factory lubricated. Take care not to
dislodge or damage the red seals.
7 Carefully insert the terminal into the flue elbow until
the bend of the terminal contacts the outer casing,
then, pull the terminal forward approximately 25 mm
and rotate the bend so that the outlet is horizontal.
Rear Exit - The flue must discharge away from the
building.
Side Exit - The flue should discharge towards the
rear of the casing to prevent flue gases re-entering
the boiler casing through the air inlet vents on the
casing front door.
The flue terminal must be fitted horizontally to
prevent dripping from the end of the terminal.
5 - BOILER INSTALLATION
Unpack the boiler
5.1
Fig. 14
8 Tighten the wing nuts holding the flue elbow and fit the
stainless steel flue guard using the two screws provided.
9 The top panel of the casing has been designed so that
it may be fitted to create a slight slope away from the
side positioned against the wall. To tilt the top panel,
loosen the four top panel casing screws, one at each
corner and push down on the side furthest from the
wall. Tighten the screws. See Fig. 14.
1 If the boiler is to be fitted against the wall, prepare the
wall to accept the heating system pipework. To mark
the wall for drilling, refer to Fig. 1 for the positions of
the pipework openings in the enclosure sides.
Note: Pipework should be insulated where it
passes through the wall into the boiler enclosure.
If the boiler is to be installed 'free standing' (i.e.
away from a wall) and the pipework run
underground, slide away the covers to open the two
pipe openings in the base of the boiler enclosure.
Using a sharp knife, cut through the polystyrene in
the base, around the edge of the holes, to allow the
flow and return pipes to enter the enclosure.
2 The electrical supply to the boiler should be routed
through the wall in a suitable conduit, such that it
enters the boiler enclosure via one of the unused
pipework openings. The cable can be routed to the
front of the boiler, for connection to the boiler
control panel, either over the top or beneath the
boiler heat exchanger. Heat resistant PVC cable, of
at least 1.0 mm² cross section should be used
within the boiler enclosure.
Preparations for installation
5.2
Page 21
21
Grant Vortex Outdoor Module
3 The oil supply line should be installed up to the
position of the boiler. Refer to Section 3.3.2 for
details. The final connection into the boiler enclosure
can be made with 10 mm soft copper, routed along the
base of the enclosure (either between the enclosure
and wall or in front of the enclosure) to enter through
one of the holes located in the bottom edge side panel,
at the front (burner) end.
See Fig. 15
Where it is not practical to use the factory supplied
low level flue, the Vortex Outdoor Module may be
fitted with a vertical flue system.
A twin wall stainless steel insulated flue system is
available from Grant UK.
An insulated boiler connector elbow, complete with
test point, replaces the low level terminal and flue
guard supplied with the boiler.
The Grant Vertical flue system connects to the elbow
and may terminate at high level or vertically as
required. See Fig. 15.
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.
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.
5 - BOILER INSTALLATION
Conventional flue - Green system
5.3
15/26 model
Item
Starter elbow
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.
GKM90
GX150/90
GX250/90
GX450/90
GX950/90
GXA250/90
GE45/90
GTH90
GTV90
GWB90
GEB90
26/36 and 36/46 models
Item
Starter elbow
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.
GKM200
GX150/200
GX250/200
GX450/200
GX950/200
GXA250/200
GE45/200
GTH200
GTV200
GWB200
GEB200
The following components are available from Grant UK.
Page 22
22
Grant Vortex Outdoor Module
5 - BOILER INSTALLATION
Fig. 15 - Conventional flue (Green system)
Page 23
23
Grant Vortex Outdoor Module
5 - BOILER INSTALLATION
See Figs. 8 and 9
1 To gain access to the water connections, remove
the two screws securing the bottom of the back
panel and remove it by withdrawing it forwards at
the bottom. Remove the top casing panel.
2 To gain access to the burner, remove the front
panel by turning the handle and withdrawing it
forwards at the bottom..
3 If required, fit the Grant sealed system kit, see
Section 5.5.
4 A Tectite elbow is fitted to the flow connection.
Orientate the elbow in the required direction. A
compression elbow is fitted to the return
connection, orientate the elbow in the required
direction.
5 Carefully manoeuvre the boiler in position to line
up with pipework through the wall. Complete the
water connections.
Note: Check that the baffles are in position and
that the cleaning cover is correctly fitted and a
good seal made.
6 If the boiler is installed against a wall, fit the wall
flashing strip. Position the strip with the bottom
edge of the wider flange 20 mm above the
enclosure top panel, with the narrow flange (with
the three fixing holes) flat against the wall. The
strip should overhang the top panel by an equal
amount at each end.
Mark the position of the three fixing holes onto the
wall, drill and plug the wall and secure the strip
with suitable screws (not supplied).
7 Fill and vent the water system and check for leaks,
rectifying where necessary.
If the Grant sealed system kit is fitted, refer to
Section 5.6 for details on filling and venting the
sealed heating system.
Make the water connections
5.4
See Fig. 16
1 The kit includes the following items:
Pressure relief valve and automatic air vent
assembly
22 mm Tectite elbow
12 litre expansion vessel with flexible hose and
sealing washer
Filling loop kit
Pressure gauge
6 m head circulating pump with 22 mm gate type valves
15 mm copper pressure relief valve discharge pipe
2 Remove the ½” BSP black iron plug from the front
of the boiler waterway.
3 Fit the ½” BSP straight end of the flexible
expansion vessel hose to the tapping on the front of
the waterway.
4 Position the 12 litre expansion vessel on the front
of the boiler combustion door locating the bracket
onto the uppermost handle of the combustion door.
5 Fit the ¾” BSP connection of the flexible
expansion vessel hose to the vessel using the black
rubber washer supplied and tighten the nut.
6 Push fit the 22 mm Tectite elbow to the boiler flow
connection.
7 Push fit the automatic air vent/pressure relief valve
assembly into the Tectite elbow.
8 Fit both 22 mm pump valves to the circulating
pump using the sealing washers supplied.
9 Fit the pump assembly to the automatic air vent/
pressure relief valve assembly ensuring that the
pump shaft is horizontal and the pump motor is
facing towards the front of the boiler. The flow
arrow on the body of the pump must face in the
direction of flow away from the boiler connection.
10 Fit the pressure relief valve discharge pipe to the
pressure relief valve using the nut and olive
supplied. Route the discharge pipe through the slot
in the base of the right hand side panel. Push the
panel insulation back to expose the slot.
11 The circulating pump may be wired into the boiler
control panel if required. Refer to Section 9.
12 The pressure gauge and filling loop should be
installed in a convenient postion inside the
building.
Sealed system kit - 15/26
5.5
Page 24
24
Grant Vortex Outdoor Module
See Fig. 16
1. The kit includes the following items:
Pressure relief valve and automatic air vent
assembly
28 mm Tectite elbow
16 litre expansion vessel with flexible hose and
sealing washer
Filling loop kit
Pressure gauge
7 m head circulating pump with 28 mm gate type valves
15 mm copper pressure relief valve discharge pipe
2 Remove the ½” BSP black iron plug from the front
of the boiler waterway.
3 Fit the ½” BSP straight end of the flexible
expansion vessel hose to the tapping on the front of
the waterway.
4 Remove the nuts and washers from the boiler
combustion door.
5 - BOILER INSTALLATION
5 fit the vessel support bracket to the studs of the
combustion door and refit the nuts and washers.
Tighten to ensure an adequate seal is made.
6 Position the 16 litre expansion vessel onto the
support bracket in front of the boiler combustion
door locating the top of the vessel behind the
control panel first.
7 Screw in the locking screw on the base of the
bracket to secure the vessel in place.
8 Fit the ¾” BSP connection of the flexible
expansion vessel hose to the vessel using the black
rubber washer supplied and tighten the nut.
9 Push fit the 28 mm Tectite elbow to the boiler flow
connection.
10 Push fit the automatic air vent/pressure relief valve
assembly into the Tectite elbow.
11 Fit both 28 mm pump valves to the circulating
pump using the sealing washers supplied.
12 Fit the pump assembly to the automatic air vent/
pressure relief valve assembly ensuring that the
pump shaft is horizontal and the pump motor is
facing towards the front of the boiler. The flow
arrow on the body of the pump must face in the
direction of flow away from the boiler connection.
13 Fit the pressure relief valve discharge pipe to the
pressure relief valve using the nut and olive
supplied. Route the discharge pipe through the slot
in the base of the right hand side panel. Push the
panel insulation back to expose the slot.
14 The circulating pump may be wired into the boiler
control panel if required. Refer to Section 9.
Sealed system kit - 26/36 and 36/46
5.5a
Fig. 16 - Sealed system pump assembly
Page 25
25
Grant Vortex Outdoor Module
5 - BOILER INSTALLATION
1 Automatic air vent(s) are fitted to the top of the
boiler (see Figs. 8 and 16). 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
system 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 top panel.
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.
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 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.
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.
A simple test to check if the expansion vessel size is
adequate, is to fill the system cold to 1.0 bar, then fully
heat the system and if the pressure rises no more than
2.0 bar the vessel is adequate. A higher figure
indicates that an extra vessel is required.
See wiring diagrams in Section 9
Note: A test switch is fitted to the control panel to
allow the boiler to be test-fired. When On, the
switch by-passes the external control system.
1 Undo the three screws and remove the lefthand
cover from the control panel to gain access to the
boiler terminal block.
2 Pass the mains power supply cable through the
cable grommet in the control panel, through the
cable clamp and connect to the terminal block as
follows:-
Live (brown) to terminal 2 - marked permanent
live
Neutral (blue) to terminal 3 - marked mains
neutral
Earth (green/yellow) to terminal 4 - marked
mains earth
Fill the sealed system
5.6
Expansion vessel pressure
5.7
Connect the power supply
5.8
Page 26
26
Grant Vortex Outdoor Module
5 - BOILER INSTALLATION
5 Ensure that the cable clamp is tightened and that all
cables are secure.
6 Replace the cover on the control panel, with the
yellow warning label facing outwards and secure with
the three screws.
Do not switch on the electrical power to the
Outdoor Module at this stage.
See Fig. 6
If a two pipe system is to be used refer to Section 4.4.6.
1 Remove the plug from the fuel pump oil inlet
adaptor 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 the
enclosure through one of the holes in the bottom of
the side panels.
3 If an external control system is to be connected to the
boiler (e.g. a S-plan system with programmer, room
thermostat, cylinder thermostat, motorised valves,
etc.), connect the 'switched live' from the control
system to terminal 1. For an example of connecting a
typical control system, see Fig. 25.
4 If the circulating pump is to be fitted within the
boiler enclosure, the pump live must be connected
to terminal 7 of the boiler terminal block.
Pass the pump power supply cable through the
cable grommet in the control panel, through the
cable clamp and connect to the terminal block as
follows:-
Earth (green/yellow) to terminal 10 - marked E
Neutral (blue) to terminal 9 - marked N
Live (brown) to terminal 7
Connecting the pump in this way allows it to be
isolated using the isolating switch fitted in the boiler
control panel, for servicing or maintenance work.
Burner components
5.10
Connect the fuel supply
5.9
Fig. 17 - RDB burner components
1 Pump
2 Control box
3 Reset button with lock-out lamp
4 Flange with gasket (do not remove from boiler)
7
8
1
2
3
5
4
6
5 Air damper adjustment screw
6 Air supply tube connection (balanced flue)
7 Pump pressure adjustment screw
8 Pressure gauge connection
Note:
Remove the factory fitted air inlet spigot adaptor (item 6, above) from the air intake on
the top right hand side of the burner and fit the grey plastic air inlet grille in its place.
See Note below
Page 27
27
Grant Vortex Outdoor Module
6 - COMMISSIONING
Refer to Fig. 18 for boiler controls
5 Check that all system controls are calling for heat and
turn the boiler thermostat to maximum. Switch on the
electricity supply.
Note: The boiler will start as soon as the electricity
supply to it is switched on.
6 The burner fan should start and the burner should
light within about 20 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. 17.
8 Operate the boiler until it reaches normal operating
temperature. Check oil supply/return pipe for leaks,
rectifying where necessary.
9 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.
10 Having ensured that there are no oil leaks, replace the
burner cover.
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. 21).
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 (two screws) 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. 17. Open the vent screw on your
vent manifold to vent the supply while the pump is
running.
Fig. 18
Page 28
28
Grant Vortex Outdoor Module
6 - COMMISSIONING
11 Relight the boiler and allow it to run for 20 minutes
then check the following:-
CO2 level, Flue gas temperature and Smoke Number.
Refer to the Technical Information in Section 3.3.
Insert combustion probe into the end of the flue
terminal to measure the CO2 level.
Do not use the test point on top of the boiler.
12 Check the smoke number, if satisfactory check the
CO2. Use the hexagonal key supplied to adjust the
burner air damper (see Fig. 17) as required. Turning
the screw clockwise opens the damper and reduces
CO2 level, turning the screw anticlockwise closes the
damper and increases CO2 level.
Re-check the smoke number if the air damper has
been moved.
Under no circumstances must the smoke number be
above 1.
A suitable position for the air damper is one which
gives 1% less CO2 than that which has a smoke
number of 1.
Note: To obtain the correct CO2 level, the final
flue gas reading must be taken with all casing
panels fitted.
Note: It is important that the air damper is
correctly set.
13 Check the flue gas temperature.
14 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.
15 Check that the condensate trap and pipe are
discharging the condensate to drain.
16 Switch off the boiler.
17 With the hot water 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.
18 A suitable central heating system inhibitor must be
added to protect the system against the effect of
corrosion.
19 Replace the top, front and rear panels.
If the boiler is to be left in service with the User, set
the controls and room thermostat (if fitted) to the
User's requirements then refer to Section 6.
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 at the low level flue terminal or the test point
on the conventional flue starter elbow where fitted.
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Grant Vortex Outdoor Module
7 - INFORMATION FOR THE USER
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.
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.
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Grant Vortex Outdoor Module
8 - BOILER SERVICING
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 should always be serviced
once per year.
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, on page 2 of these
instructions. 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 13 on page 39.
Note: A test switch is fitted to the control panel to
allow the boiler to be test-fired. When On, the
switch by-passes the external control system.
1 Check the flue terminal and ensure it is not blocked
or damaged.
2 Run the boiler and check the operation of its controls.
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.
Refill, vent and re-pressurise the system as necessary.
4 Check that the louvres in the front panel are clear.
5 Check for any sludge/water from the fuel 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 nozzle fitted.
1 Remove the front panel by turning the handle and
withdrawing it forwards at the bottom.
2 Remove the four screws securing the top panel and
carefully lift it off, taking care not to damage the
insulation.
Note: The top panel has been designed to provide
a slight fall away from the side positioned against a
wall, the side of the top panel with the fixing
screws closer to the bottom edge is the highest side
and goes against the wall.
3 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. 19 or 20.
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. 19 or 20.
7 Pull out the spiral turbulators from the heat exchanger
tubes. See Fig. 21.
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 dicharges from the
22mm 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.
Important notes prior to servicing
8.1
Dismantling prior to servicing
8.2
Cleaning the boiler
8.3
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Grant Vortex Outdoor Module
8 - BOILER SERVICING
10 Check that the boiler condensate outlet is
unobstructed. Clean if necessary.
Fig. 19 - 15/26
Fig. 21
Fig. 20 - 26/36 and 36/46
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Grant Vortex Outdoor Module
8 - BOILER SERVICING
Fig. 22
4 ± 0.3 mm
3 to 3.5 mm
Clamp screw
Cleaning the burner
8.4
See Section 12
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 22.
3 Nozzle - The nozzle must be replace annually. Check
that the nozzle size and type are correct, refer to table
in Section 3.3 and boiler data label. Clean the nozzle
with kerosene if necessary. Do not use a pin or piece
of wire to clean the nozzle.
Replace the nozzle if a build up of carbon is present.
With the combustion head removed, loosen the
electrode assembly clamp screw and slide the
electrodes away from 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. 22.
4 Photocell - The photocell is a push-fit in the burner
body. Carefully pull out the photocell to clean.
5 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.
6 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 27.
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Grant Vortex Outdoor Module
9 - WIRING DIAGRAMS
Vortex Outdoor Module wiring diagram
9.1
Colour code:br - Brown, r - Red, bl - Blue, y - Yellow, g/y - Green/Yellow
Fig. 23
Grant programmable room thermostat
9.2
Fig. 24
A programmable room thermostat - Part No. RSKIT is available from Grant UK. The thermostat has a 5/2 day
operation and enables six time and temperature changes each day. The thermostat incorporates frost protection and an
On/Off facility.
Page 34
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Grant Vortex Outdoor Module
9 - WIRING DIAGRAMS
Fig. 25
Honeywell S Plan (HW & CH controlled by two valves)
Typical control system wiring diagram
9.3
Page 35
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Grant Vortex Outdoor Module
Boiler fault finding
10.1
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 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 the nozzle size and type.
Insufficient air supply - check the air damper setting and the condition of the fan.
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 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.
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 Oil odours.
11 Combustion fumes smell.
Page 36
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Grant Vortex Outdoor Module
10 - FAULT FINDING
Riello RDB burner fault finding
10.2
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Grant Vortex Outdoor Module
11 - BOILER SPARE PARTS
Description Part No.
Cleaning door nut and washer set ..................................................... EFBS14
Double pole switch ........................................................................... EFBS19
Test switch ....................................................................................... EFBS21
Frost thermostat................................................................................ EFBS23
Baffle set - 15/26 .............................................................................. VBS12
Baffle set - 26/36 and 36/46.............................................................. VBS13
Sealed system - Expansion vessel 12 litre - 15/26 ............................. MPSS01
Sealed system - Expansion vessel 16 litre - 26/36 and 36/46 ............ MPSS07
Sealed system - Water pressure gauge .............................................. MPSS02
Sealed system pressure relief valve ................................................... MPSS03
Sealed system - Expansion vessel flexible hose ................................ MPSS04
Cleaning cover seal - 15/26 .............................................................. VBS15
Cleaning cover seal - 26/36 and 36/46 .............................................. VBS16
Overheat thermostat.......................................................................... TPBS33
Boiler thermostat .............................................................................. TPBS34
Circulating pump - 6 m head ............................................................ MPCBS23
Circulating pump - 7 m head ............................................................ VBS54
Vortex Outdoor Module - Spare Parts
11.1
Burner Heads
Page 38
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Grant Vortex Outdoor Module
Riello RDB burner - exploded view
11.1
1 Not applicable - 2 Flange 3005786 RBS28
3 Combustion head T1 - 15 & 20 kW 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, 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 intake cover RBS142
Burner head identification
12 - BURNER SPARE PARTS
Page 39
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Grant Vortex Outdoor Module
13 - 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 dermatitus.
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.
Page 40
D181
Grant Engineering (UK) Limited
Hopton House, Hopton Industrial Estate, Devizes, Wiltshire SN10 2EU
Telephone: (0870) 7775553 Fax: (0870) 7775559
email: info@grantuk.com website: www.grantuk.com
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 2004. No part of this manual may be reproduced by
any means without prior written consent.
Manual compiled and designed by Publications 2000 Tel: (01670) 356211
Complies with the EC Low voltage,
Electromagnetic compatibility and
Boiler efficiency Directives
89/336/EEC
73/23/EEC
92/42/EEC
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)
14 - EC DECLARATION OF CONFORMITY
SEDBUK Rating:-
Vortex 15/26.......................................... 94 - 95%
Vortex 26/36.......................................... 97%
Vortex 36/46.......................................... 92.62%
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