Grant Vortex Boilerhouse Combi Guide

Grant Vortex
Boilerhouse Combi
Range of oil condensing boilers
Installation, commissioning & maintenance
instructions
GR| DOC 0001 | REV 0.0 | JUNE 2020

Heatmax
Thessaloniki Greece
Phone + 30 2310 383873 | Fax [phone] |
www.heatmax.gr
Page 2

Caution concerning likely damage to
equipment or tools as a consequence of not
following the instructions in the caution.
Warning of possible human injury as a conse-
quence of not following the instructions in the
warning.
Used for emphasis or information not directly
concerned with the surrounding text but of
importance to the reader.
SERVICING
The boiler should be serviced at least every twelve months and the details
entered in the Service Log in the user handbook.
TYPE OF FUEL
All Grant boilerhouse combi boilers are suitable for use with Class C2
Kerosene.
The use of Class D Gas Oil on all Grant Low NOx and Blue Flame boilers
DOES NOT comply with ErP requirements or EU regulations, and as a result
Grant IRL does not condone its use.
To use Bio-Kerosene (B30K), refer to the information below:
OPERATION ON BIOFUEL
All Grant boilerhouse combi boilers manufactured since May 2011 are
suitable for operation on both standard Kerosene (Class C2 to BS 2869)
and also bio-kerosene - up to a 30% blend (B30K).
All burner settings and nozzle sizes (as detailed in Section 2.2 of these
instructions) are correct for both standard kerosene and bio-kerosene
(B30K).
In order to operate this boiler on bio-kerosene, it will be necessary to take
the following actions:
• Use a bio-kerosene (B30K) compatible flexible oil line in place of the
oil line supplied with the boiler.
• Have the oil storage tank and oil supply line (including all pipework,
sight gauges, filters, isolating valves, fire valves, de-aeration devices,
etc.) checked for their compatibility with bio-kerosene (B30K).
Where necessary, some or all of these items may have to be replaced
with a bio-kerosene compatible alternative.
• Check the suitability of the flue system with Grant Ireland.
• Use only bio-kerosene (B30K) that conforms to OPS24.
IMPORTANT:
Under no circumstances, should the boiler be used with
bio-kerosene without the above actions being taken first
Product code Identier Serial Number
001-01-CLN 460
001-02-CLN 461
001-03-CLN 462
WARNING
CAUTION
NOTE
IMPORTANT NOTE FOR INSTALLERS
These instructions are intended to guide installers on the installation,
commissioning and servicing of the Grant Boilerhouse Combi oil boiler. After
installing the boiler, leave these instructions with the user.
SPECIAL TEXT FORMATS
The following special text formats are used in these instructions for the
purposes listed below:
PRODUCT CODES AND SERIAL NUMBERS
COVERED
e serial numbers used on Grant oil boilers consist of a een digit
numerical code with the nal three digits being the product identier.For
example:
100000200218460
These instructions cover the following product codes and serial numbers
This appliance can be used by children
aged from 8 years and above and persons
with reduced physical, sensory or mental
capabilities or lack of experience and
knowledge if they have been given
supervision or instruction concerning
use of the appliance in a safe way and
understand the hazards involved.
Children shall not play with the appliance.
Cleaning and user maintenance shall not
be made by children without supervision.
Page 3

CONTENTS
Page 4
INTRODUCTION
Important note for Installers 3
Special Text Formats 3
Product codes and serial numbers covered 3
Servicing 3
Type of fuel 3
Operation on bio-fuel 3
CONTENTS 4
1 INTRODUCTION 6
1.1 Low nox technology 6
1.2 How a condensing boiler works 6
1.3 Boiler description 6
1.4 Boiler components 6
2 TECHNICAL DATA 8
2.0 Grant research and development combustion
at altitude 8
2.1 Burner power/altitude correspondence 8
2.2 Technical data boilers 8
2.3 Seasonal efficiency, EPR, and NOX class 10
2.4 Smoke analysis (combustion gases) 10
2.5 Dimensions for Grant Vortex Boilerhouse
Combi boiler 11
3 Oil SUPPLY 12
3.1 Oil supply 12
3.1.1 Fuel storage and regulations 12
3.1.2 Fuel pipes 12
3.1.3 Single pipe system 13
3.1.4 Two pipe system 13
3.2 Connecting oil supply to the burner in single tube
or in twin-tube. 14
3.3 Main components of the burner 15
4 INSTALLATION 16
4.1 Inroduction 16
4.2 Location of boiler 16
4.3 Compliance with regulations 16
4.4 Heating system design considerations 16
4.5 Pipework materials 17
4.6 Connections 17
4.7 Preparation for installation 17
4.8 Installing the boiler 17
4.9 Filling the heating system 17
4.10 Before commissioning 18
4.11 End of the works 18
4.12 Heating circuits with underfloor heating 18
4.13 Underfloor piping 18
5 PIPE CONNECTIONS 19
6CONDENSATE DISPOSAL 20
6.1 General requirements 20
6.2 Connections 20
6.3 Pipework 20
6.4 External pipework 20
6.5 Condensate soakaway 21
6.6 Condenstate trap 21
6.7 Disposal of condensate 21
6.8 Inspection and cleaning of trap 21
6.9 External condensate 22
7 SEALED SYSTEM 23
7.1 Sealed system requirements 24
7.1.2 Pressure gauge 24
7.1.3 Pressure relief (Safety valve) 24
7.1.4 Filling / Disconnector 24
7.1.5 Heating system 25
7.2 Filling the installation with closed expansion
vessel 25
7.3 Purge of the pump (on heating pump,
or primary pumor DHW pump) 25

Page 5
7.4 Safety valve 3B 25
8 ELECTRICAL CONNECTIONS 26
8.1 General 26
8.2 Connecting the power supply 26
8.3 Frost Protection 26
8.2 Power supply connection 27
9 COMMISSIONING 28
9.1 Before Switching On 29
9.2 Switching On 29
9.3 Completion 29
9.4 Information for the User 29
10 MAINTAINING YOUR BOILER 30
10.1 General 30
10.2 Pre-service checks 30
10.3 Disassembly before servicing 30
10.4 Cleaning the boiler 30
10.5 Removing the burner 32
10.6 Burner maintenance 33
10.7 Cleaning and replacing the combustion head
components 34
10.8 Checking the deflector position 34
10.9 Control of the combustion head position 35
10.10 Checking the position of the electrodes 35
10.11 Coil replacement 36
10.12 Capacitor replacement 36
10.13 Maintenance Of Your boiler 36
10.14 Cleaning the pump filter 37
11 FAULT FINDING 38
11.1 Fault findings- Diagnostic 38
11.2 Burner diagnosis -Cuenod MAX 4 or MAX 8 39
12 BURNER AND BOILER SPARE
PARTS 40
12.1 Cuenod burners(18kW, 24kW & 32kW models) 40
12.2 LIst of boilers parts 42
13 EC DECLARATION OF
CONFORMITY 43
14 HEALTH INFORMATION 44
14.1 Insulation materials 44
14.2 Sealant and adhesive 44
14.3 Fuel oils 44
15 Guarantee 45
16 PRODUCT FICHE 47
17 END OF LIFE OF THE PRODUCT 48
General 48
Disassembly 48
Recycling 48
Component 48
Equipment 48
Disposition 48
18 REMARKS 49

This manual is intended to guide installers in the installation,
commissioning and maintenance of the Grant Boilerhouse Combi oil
boiler. A user guide for the operation of this boiler is attached to the
back of this manual.
1.1 LOW NOX TECHNOLOGY
All Grant oil condensing boilers are based on Low NOx
technology. They are designed to meet both the European eco-
design (ErP) emission limits introduced in September 2018 (<120mg
/ kwh) and to maintain the high yields expected from Grant Vortex
oil boilers. They combine the proven technology of the Grant
condensing boiler with the Cuenod MAX compact Low NOx flame
burner.1.1
1.2 HOW A CONDENSING BOILER
OPERATES
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 Boilerhouse Combi 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 net thermal efficiencies of 100%.
To achieve maximum performance from the Grant Vortex
Boilierhouse Combi 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 Grant Vortex Boilierhouse Combi 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.
1.3 BOILER DESCRIPTION
Grant Vortex Boilerhouse Combi boilers are designed to be
installed inside the building in a dedicated and ventilated room
called the boiler room.
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 open vented or sealed central
heating systems. System models are supplied with the necessary
components factory fitted. Refer to Section 7.
All boilers are supplied with the control panel and burner factory
fitted.
All the models in the current Grant vortex boilerhouse combi
range of boilers are designed to comply with the maximum NOx
emissions* under the Energy-related Products Directive (ErP).
* From the 26th September 2018, the maximum NOx emissions for
all new oil fired boilers (up to and including 400kW for both new
build and replacement boiler installations) is 120mg/kWh.
The boilers are supplied with:
-a separate Cuenod burner ready to be fitted,
-a 3bar valve + auto bleed valve to mount
- user manual - installer and commissioning Grant boiler.
1.4 BOILER COMPONENTS
The boiler is fitted with a flue safety thermostat which automatically
shuts down the boiler if the heat output exceeds a preset
temperature of 90 ° C ± 3 ° C.
1 INTRODUCTION
Introduction
Page 6

Introduction
Figure 1-2: Vortex boilerhouse combi control panel
Figure 1-1: 18kW 24kW & 32kW components
Item Description
1Cuenod Burner
2Control Panel
3Boiler
3
2
1
Page 7

2.0 GRANT RESEARCH AND
DEVELOPMENT COMBUSTION AT
ALTITUDE
The R&D department of Grant Engeeniring located in Birr (Grant
Headquarters) in Ireland, are aware of the challenges of fuel oil
quality at altitude, has created an altitude chamber in its laboratory
in order to test all the burners capable of operating on territory at
any altitude.
The results allow Grant to guarantee the use of its boilers under nor-
mal conditions of use at the altitudes mentioned in Table 2.3 below.
For an even better adaptation, we are preparing kits for operation
at higher altitudes.
* For altitude adaptation of Grant vortex boilerhouse combi 52kw
and 66kw boilers, please contact us at
[email protected]
[email protected]
2 TECHNICAL DATA
Table 2-1: Burner power / altitude correspondence table
Technical data
Power Jet Pump
pressure
Air
diffuser
adjust-
ment
Power Jet Pump
pressure
Air
diffuser
adjust-
ment
Power Jet Pump
pressure
Air
diffuser
adjust-
ment
Power Jet Pump
pressure
Air diffuser
adjustment
18 0.40/80°S 13 26.3 16.3 0.40/80°S 11.5 26.3 15.8 0.40/80°S 11 26.3 15.3 0.40/80°S 10 26.3
24 0.55/80°S 11 26 22 0.55/80°S 9 26 21.2 0.55/80°S 9 26 20.5 0.55/80°S 8.5 26
32 0.65/80°S 12 27.2 29.3 0.65/80°S 10.2 27.2 27.9 0.65/80°S 9.5 27.2 27.2 0.65/80°S 8.5 27.2
0-500m 500m-1000m 1000-1500m 1500-2100m
Page 8

Table 2-2:Technical data Boilers - GRANT VORTEX BOILERHOUSE COMBI
Data Units VORTEX BOILERHOUSE COMBI
18KW 24KW 32KW
Heating body volume litre 13 13 21
Boiler packed complete kg 121.250 121.250 135.140
Boiler & Burner floor weight kg 111.95 111.95 125.845
Dry weight boiler only kg 102.83 102.83 116.73
Maximum heating power kW 18 24 32
Heating flow connection 22mm 22mm 28mm
Heating return connection 22mm 22mm 28mm
Minimum flow (ΔT=10°C) l/h l/h 1780 2200 2280
Minimum flow (ΔT=20°C) l/h l/h 890 1100 1490
Condensate outlet connection 22 mm (connect only with pvc pipes) (a neutralizer is recommended)
Flue outlet diameter 18 & 24 kw =80mm 32kw =100mm
Waterside resistance ΔT=10°C mbar 28.5
Waterside resistance ΔT=20°C mbar 10.0
Maximum static height m 20
Minimum static height for pump operation m 1
Boiler thermostat range °C 55 à 75
T ° limit before safety thermostat cut-off °C 110 ± 3
Limit T ° of smoke before switching off the smoke safety
thermostat (for plastic smoke) °C 90°C
Boiler base temperature °C less than 50
Power supply 230/240 V ~ 50 Hz protected at 5 Amp
Engine power watts
Oil connection ¼” BSP Male delivered with 1/4 1/8 reduced (on flexible oil outlet)
Chimney draft (depression pipe) N/m² Minimum 8.7 - Maximum 37
Maximum operating pressure - closed vessel bar 2
Maximum operating pressure - open vessel bar 3
Type boiler operation ON / OFF ON ELECTRICAL BOX (EXTERNAL TO THE BOILER)
Technical data
1. The data in the table are given as an indication likely to be adjusted according to the constraints of the site
2. Household fuel oil, bio fuel oil (<= 10%) and fuel oil with a low sulfur rate can be used
3. The smoke temperatures in the table are given at +/- 10%
4. When commissioning the air shutter must be adjusted to obtain the appropriate CO2 rate
5. In red, the burner is factory preset at powers 18kw, 24kw, 32kw.
6. The measuring point on the door can only be used for CO2 measurement and the smoke opacity test, but not for measuring the efficiency or temperature
of the smoke
7. The installer must modify the data on the burner label if he changes the capacity.
Page 9

2.3 SEASONAL EFFICIENCY, ERP AND NOX CLASS (NITROGEN OXIDE)
2.4 SMOKE ANALYSIS (COMBUSTION
GASES)
To allow the boiler to be put into service and maintained, the boiler
is supplied with a combustion test socket on the front cleaning door.
When this test point is used, please note the following measures:
• The test sample relates only to the CO2 readings and the smoke
opacity test.
• The smoke output and temperature must be taken from a mea-
surement point located on the starting element of the smoke pipes of
the high, vertical and conventional outlet kits.
• The suction cups with low outlet do not contain a test point. The
smoke temperature and efficiency readings must be taken at the
outlet of the terminal duct.
To allow the boiler to be commissioned and serviced, the boiler is
supplied with a combustion test point on the front cleaning door.
Techical data
Table 2.3 Seasonal efficiency, ErP and NOx class
Boiler type
Power
Jet
Oil
pressure
(bar)
Smoke
No.
Burner
combustion
head type
Deflector
setting
Oil
mass
flow
rate (kg
/ h)
Smoke
temperature
(° C)
CO2
(%) NOx ErP Class ErP Seasonal EFF
(kW)
EURFBH-
18MAX4 18 0.40/80°S 13 0 - 1 EG 26.3 1.60 55 - 75 12.5 <120mg/
kWh A93%
EURFBH-
24MAX4 24 0.55/80°S 11 0 - 1 EG 26.0 2.13 55 - 75 12.5 <120mg/
kWh A92%
EURFBH-
32MAX4 32 0.65/80°S 12 0 - 1 EG 27.2 2.84 55 - 75 12.5 <120mg/
kWh A92%
Page 10

2.5 DIMENSIONS FOR GRANT VORTEX BOILERHOUSE COMBI BOILER
Figure 2-5.1:Vortex Boilerhouse Combi Dimensions 18kw, 24kw, 32kw
Technical data
611
471
40
585
624
862
991
837
696
716
62
708
810
820
85
389
215
290
114
PLAN VIEW
REAR VIEW LEFT SIDE VIEW RIGHT SIDE VIEW
219
CONDENSATE
DRAIN
HEATING FLOW HEATING RETURN
PRV
CABLE ENTRY
DHW-OUT
COLD MAINS
=18kW & 24kW
=32kW
Page 11

3.1 OIL SUPPLY
3.1.1 FUEL STORAGE AND REGULATIONS
The tank must be placed in accordance with the recommendations
of national and european standards. Legislation for tanks for
heating or for tanks with pump Order of July 1, 2004 fixing the
technical and safety rules applicable to the storage of petroleum
products (NOR: INDI0403209A / Extracts) see site info@
grantengineering.ie
which give details on filling, maintenance and protection against
fire.
STORAGE CONSTRUCTION RULES
Article 5.1:
• “Light” type steel tanks: National and european standards NF M
88-940
• Parallelepipedal steel tanks NF E 86-255
• Plastic tanks with secondary envelope: the harmonized standard
NF EN 13341
• Double-walled steel tanks: European standard NF EN 12285-1
(buried) or NF EN 12285-2 (overhead)
ARTICLE 5.2: ADDITIONAL PROVISIONS
• There must be no withdrawal point in the lower part.
• The tank must be equipped with a gauging device. Glass or
plastic level tubes are prohibited.
• Any tank fitted with a filling connection must be fitted with a
device to prevent the risk of overflowing during filling operations.
NON-UNDERGROUND STORAGE
Article 11:
Tanks installed outdoors must be designed to store petroleum
products outdoors. In particular, the opacity of the tank must be
sufficient to prevent the characteristics of the petroleum product
stored from deteriorating.
Article 12:
The receptacles or tanks must be equipped with a second
waterproof envelope and be designed in such a way that it is
possible to become aware of any loss of sealing of the interior
envelope.
Article 13:
Depending on the overall storage capacity, a minimum distance
must be respected between the wall of the tank and the nearest
building:
• less than 2,500 liters: no distance is imposed.
• between 2,501 and 6,000 liters: 1 meter
• between 6,001 and 10,000 liters: 6 meters
• between 10,001 and 50,000 liters: 7 meters
STORAGE ON THE GROUND FLOOR OR IN THE
BASEMENT OF A BUILDING
Article 16.1 – Installation :
The tanks must be placed on a level masonry floor. The tanks must
be fitted with a waterproof secondary fire-resistant enclosure.
Article 16.3 – Protection incendie :
The room where the storage facility is installed must be capable
of being closed by a fire-resistant door: flame arresters of at least
a quarter of an hour’s degree. The walls as well as the upper and
lower floors of the room must have a fire resistance: fire stop of
degree at least half an hour.
3.1.2 FUEL PIPES
Fuel supply pipes should be either copper or steel. Galvanised
pipes or fittings should not be used.
Plastic oil supply pipe conforming to BS EN 14125 can be used for
underground pipe runs, but must not be used above ground.
All soft copper pipe connections should preferably be made using
flared fittings. If compression fittings are to be used, a suitable pipe
insert must be fitted into the pipe end.
Soft soldered connections must NOT be used on oil supply
pipework.
Fuel supply pipework should be of a suitable diameter, depending
on the type of oil supply system being used. Refer to information
given in sections 3.1.3, 3.1.4 or 3.1.5.
Run pipes as level as possible to prevent air being trapped. Take
the most direct route possible from tank to burner whilst locating the
pipe where it will be protected from damage.
Pipes should be supported to prevent sagging and sleeved where
they pass through a wall.
A metal body fuel filter with a filtration size of no more than 50
μm (micron) or lower must be fitted in the oil supply pipe close to
the tank. This should be fitted with sufficient clearance around and
below it to allow easy access for maintenance.
An isolating valve should also be fitted at the tank, before the filter,
to allow the oil supply to be shut off for the filter to be serviced.
A second filter (15 μm for Kerosene) must be located closer to the
burner to protect the burner pump and nozzle from contamination.
Refer to Figures 3-1 to 3-3.
A remote sensing fire valve must be installed in the fuel supply line in
accordance with BS5410-1.
A galvanized tank must not be used. A plastic
tank can be used and must comply with
standards (see above)
Plastic tanks must be placed in a suitable and
uniform manner on a flat and smooth surface,
in continuity, that is to say the base all in
contact with the ground.
3 OIL STORAGE AND SUPPLY SYSTEM
Fuel Storage and Fuel System
NOTE
NOTE
CAUTION
Article 18:
The storage must be installed in an exclusive room if its overall
capacity exceeds 2500 litres.
UNDERGROUND STORAGE
Artice 19:
Only the reinforced safety tanks mentioned in article 5 of this de-
cree are authorized to be buried.
Storage construction rules (extracts)
Page 12

A fusible wheelhead type combined isolating/fire valve MUST
NOT be used in place of a remote sensing fire valve.
The fire valve must be located outside; just before the oil line enters
the building, with the fire valve sensor located above the burner. A
spring clip for mounting the sensor is supplied fitted to the boiler, on
the rear of the control panel.
The fire valve should be located after the second (15 micron) filter,
i.e. between the filter and the point at which the oil line enters the
building. Refer to Figures 3-1 to 3-3.
The fire valve must have an operating temperature of between 90
and 95°C to avoid unnecessary nuisance shut-offs to the oil supply.
A flexible fuel hose and ¼ isolating valve are supplied lose with the
boiler, to make the final connection to the burner.
If a two-pipe system or deaerator is to be used,the deaerator must
be fitted externally. A solid metal type can be fitted internally but
must be vented to atmosphere externally. The following additional
items will be required:
• Flexible fuel hose male x ¼ female (product code: RBS36 -
900 mm / product code: RBS36XS - 600mm)
• x ¼ BSP adaptor (product code: Z3003602)
• ¼ isolating valve (product code: ISOLATION1/4)
These are available to purchase from Grant Irl.
Metal braided flexible fuel hoses should be replaced ANNUALLY
when the boiler is serviced.
Long life flexible fuel hoses should be inspected annually and
replaced, if necessary, or after a maximum five years service life.
3.1.3 SINGLE PIPE (GRAVITY) SYSTEM 
(REFER TO FIGURE 31)
Head A (m) Maximum pipe run (m)
10 mm OD pipe 12 mm OD pipe
0.5 10 20
1.0 20 40
1.5 40 80
2.0 60 100
IF THE STORAGE TANK OUTLET IS AT LEAST 300 MM ABOVE
THE LEVEL OF THE BURNER OIL PUMP, A SINGLE PIPE
(GRAVITY) SYSTEM SHOULD BE USED.
The maximum height of the oil level above the burner oil pump
when the tank is full, must not exceed four metres. If this height is
exceeded, a pressure reducing valve must be fitted in the oil supply
pipe between the tank and the burner oil pump.
The maximum length of pipe run from the tank to the burner is limited
by the minimum head of oil (the height of the tank outlet above the
burner oil pump).
3.1.4 TWO PIPE SYSTEM(REFER TO FIGURE 32)
Height A (m) Maximum hose length (m)
10 mm Diam ext. 12mm diam ext.
035100
0.5 30 100
1.0 25 100
1.5 20 90
2.0 15 70
3.0 8 30
3.5 6 20
Fuel Storage and Fuel System
CAUTION
CAUTION
If the storage tank outlet is below the level of the burner oil pump, a
two pipe (sub gravity) system can be used.
The return pipe should be at the same level as the tank outlet,
between 75 to 100 mm above the base of the tank. The return pipe
should be a sufficient distance from the tank outlet so as to prevent
any sediment disturbed by the return entering the supply pipe from
the tank.
A non-return valve should be fitted in the supply pipe, along with a
fire valve and filters (refer to section 3.1.2 - fuel pipes). A non-return
valve should also be fitted in the return pipe if the top of the tank is
above the burner oil pump.
The maximum suction height (from the tank outlet to the level of the
burner oil pump), must not exceed 3.5 metres.
The pump vacuum should not exceed 0.4 bar. Beyond this limit, gas
is released from the oil.
For guidance on the installation of top outlet fuel tanks and sucti oil
supply pipe sizing, refer to OFTEC Technical Book 3: Storage and Supply,
available for purchase from OFTEC.
If a two-pipe system is to be used, the following additional items will be
required:
• Flexible fuel hose male x ¼ female (product code: RBS36 - 900 mm
/ product code: RBS36XS - 600mm)
• x ¼ BSP adaptor (product code: Z3003602)
• ¼ isolating valve (product code: ISOLATION1/4)
These are available to purchase from Grant IRL.
Page 13
IMPORTANT: If the oil supply piping is
renovated with a twin-tube passage from the
tank to the filter pot towards single-tube, then
reduce the diameter of the copper piping.
The hoses must NOT be used outside the boiler.
A metal bowl type filter pot with micron filter
(consumable) must be installed on the oil
supply line next to the boiler. This should be
mounted leaving enough space around and
below to service the filter. A shut-off valve
must be installed before the filter pot to isolate
it and allow its maintenance.
A second filter (10 to 15 μm requested by
Grant) must be placed as close as possible to
the burner to protect the pump and the burner
nozzle from contamination. See Figures 3-1
through 3-3.
2 oil hoses with adapter and ¼ “BSP isolation
valve are supplied separately with the boiler
for connection to the burner.
Braided metal hoses must be replaced
annually when servicing the boiler. Long
life hoses should be inspected annually and
replaced at least every 60 months.
Grant IRL recommends TOC DUO type filter
pots including an air separator.

Number / item correspondence table diagrams fig 3-2/3-3
1 oil tank exterior wall 7 burner
2 isolation valve oil filter (max filtration 15μm) 8 non-return valve
3 oil strainer oil pump 9 air separator
10 boiler isolation valves
* Position of de-aeration device must be level with or above the oil pump
* The air separator must be positioned at the level of the oil pump or placed above
Figure 3-2: Bitube oil supply
Figure 3-3: Supply with oil filter pot fitted with TOC DUO air separator
123
2
4
4
5
8
8
5
9
7
7
6
6
10
10
3.5m Max
123
2
3.5m Max
150mm
10
Fuel Storage and Fuel SystemPage 14
1/4" BSP female
connections
Tiger Loop
SUPPLY
TO PUMP
RETURN
FROM PUMP
SUPPLY
FROM TANK
Figure 3-4: Tiger loop de-aeration device
Refer to your oil tank supplier for any advice
concerning the type of single-tube, two-tube
oil supply, filter pot with separator, piping
diameter, safety device, compliance with
safety standards. Grant IRL cannot be held
responsible for liability for a faulty fuel oil
supply.
CAUTION

See figure 3-4.5.6
To facilitate access to the burner oil pump connections, the burner
must be removed from the boiler as follows:
1. Remove the burner cover in white plastic.
• Models 18kw, 24kw and 32kw: Unscrew and remove the 2 fix-
ing screws of the white burner cover and remove the burner cover.
2. Unscrew and remove the single burner fixing nut from the burner
flange stud (at the top of the burner) using a 13 mm wrench. Save
the fixing nut to reassemble the burner.
3. Carefully remove the burner from the boiler
3.3 MAIN COMPONENTS OF THE
BURNER
With all Grant Vortex Boilerhouse Combi, the burner and the boiler
are supplied together but in separate boxes.
Install the burner on the boiler as follows:
1. Remove and save the bolt fixing nut on the burner flange at the
front of the boiler.
2. Check that the O-ring around the burner combustion head collar
is in place.
3. Mount the burner on the boiler by sliding the combustion head
into the hole in the center of the mounting flange. Place the mounting
bracket (on top of the burner) on the mounting bolt.
4. With the burner level and properly placed in the mounting flange,
attach the nut (previously removed) to the mounting bolt and tighten
with a 13mm wrench.
Figure 3-6: CUENOD pump description
Item Description
1Fuel solenoid valve
2Electrical connection of the solenoid valve
3Fuel supply hose
4Connection of the vacuum pressure gauge
5Suction connection
6Return connection
7Fuel pressure regulator
8Fuel pressure gauge connection
2
4
1
8
7
65
3
Fuel Storage and Fuel System
The pump has a suction filter and a fuel
pressure regulator. Before putting the
equipment into service, connect pressure
gauges to measure the vacuum.
Before starting the burner, check that the
return pipe is open. Any obstruction could
damage the pump seal.
The plug mounted in the intake (suction) port
of the oil pump is made of plastic and does not
provide an oil seal when the pump is running.
Make sure that the oil supply from the tank is
connected to this port and that the plastic plug
is discarded.
DANGER
CAUTION
NOTE
Page 15
Figure 3-4: Two-pipe system (standard)
3.2 CONNECTING OIL SUPPLY TO THE
BURNER IN SINGLE TUBE OR IN TWIN
TUBE.

4.1 INTRODUCTION
1. The Grant Vortex Boilerhouse Combi boiler models are supplied
in two boxes:
- one containing the boiler and
-the other the burner, the condensate trap.
2. Carefully remove the packaging from the boiler and unpack the
box containing the other elements.
4.2 LOCATION OF THE BOILER
The boiler must rest on a firm, level and non-combustible ground
capable of supporting the weight of the boiler when it is in water.
Refer to chapter 2.1 to check the weights of the boiler to be
installed. It does not require a special hearth as the temperature of
the boiler base is less than 50°C.
Sufficient clearance must be allowed at the front of the boiler to
remove the burner and the smoke baffles for maintenance.
4.3 COMPLIANCE WITH REGULATIONS
Installation of a Grant Vortex boiler must be in accordance with the
following recommendations:
• Building Regulations, national and european and the Building
Standards issued by the Department of the Environment
and any local Byelaws which you must check with the local
authority for the area.
• Model and local Water Undertaking Byelaws.
• Applicable Control of Pollution Regulations.
• National Building Regulations and any local Byelaws.
• Model Byelaws and the Water Supply Regulations.
• 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 Book 3 (Installation requirements for oil
storage tanks) and OFTEC Technical Book 4 (Installation
requirements for oil fired boilers).
The installation should also be in accordance with the latest edition
of the following National Standard Codes of Practice (and any
relevant amendments):
• BS 5410-1: 2019 (Code of practice for liquid fuel firing.
Installations for space heating and hot water supply purposes
for domestic buildings)
• This standard covers domestic installations up to 70kW.
• BS 5410-2: 2018 (Code of practice for liquid fuel firing. Non-
domestic installations)
• This standard should be followed with regard to
installations with an output capacity in excess of 70kW.
• Where the combined outputs of multiple appliances
located together at a domestic dwelling exceed 70kW
then then a dedicated plant room as specified in BS 5410-
2 is recommended.
• BS EN 12828 (Heating systems in buildings. Design for water-
based heating systems)
• BS EN 12831-1 (Energy performance of buildings. Method for
calculation of the design heat load)
• BS EN 14336 (Heating systems in buildings. Installation and
commissioning of water based heating systems)
• BS 7593 (Code of Practice for treatment of water in domestic
hot water central heating systems)
• BS 7671 (Requirements for Electrical installations, IET Wiring
Regulations)
• BS 7291 (Thermoplastics pipe and fitting systems for hot and
cold water for domestic purposes and heating installations in
buildings. General requirements)
• BS 7074-1 (Application, selection and installation of expansion
vessels and ancillary equipment for sealed water systems.
Code of practice for domestic heating and hot water supply)
• BS 2869 (Fuel oils for agricultural, domestic and industrial
engines and boilers. Specification)
4.4 HEATING SYSTEM DESIGN
CONSIDERATIONS
To achieve the maximum efficiency 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
Size radiators with a mean water temperature of 60°C.
Design system controls with programmable room thermostats or
use weather compensating controls to maintain return temperatures
below 55°C.
4 INSTALLATION INFORMATION
Boiler Installation Information
A removable section of worktop above
the boiler is required to provide access for
servicing.
NOTE
Failure to install and commission appliances
correctly may invalidate the boiler guarantee.
NOTE
WARNING
BS5410-1: 2019 requires that appliances
located in a building or structure or within
a restricted area externally should have a
CO detector conforming to BS EN 50291-1
installed in the same room/space.
WARNING
Before starting any work on the boiler or fuel
supply, please read the Health and Safety
information given in Section 15.
The boiler should not be allowed to operate
with return temperatures of less than 40°C
when the system is up to temperature.
NOTE
The use of a pipe thermostat is recommended to control the return
temperature when using weather compensating controls.
UNDERFLOOR:
• Flow temperature 50°C
• Return temperature 40°C
• Differential 10°C
In underfloor systems, it is essential that the return temperature must
be maintained at or above 40°C to prevent internal corrosion of
the boiler water jacket.
Refer to Section 2.5 for the size and type of the connections and
Section 5 for the position of the connections.
Page 16

Boiler Installation Information
NOTE
The presence of ‘pumping over’ in an open
vented heating system connected to the Grant
Vortex boiler will invalidate the product
guarantee.
OPEN VENTED SYSTEMS:
Open vented systems must be correctly designed and installed.
The open safety vent pipe must be positioned to prevent ‘pumping
over’ (i.e. the discharge of water from the open safety vent pipe
into the feed and expansion cistern under the pressure created by
the circulator).Failure to do so can cause oxidization to occur and
invalidate the warranty. For detailed information on the correct
design of open vented heating systems, and the correct location
of the open safety vent pipe, refer to the CIBSE Domestic Heating
Design Guide and OFTEC Technical Book 4 (Installation).
4.5 PIPEWORK MATERIALS
The Grant Vortex boiler is compatible with both copper and plastic
pipe. Where plastic pipe is used it must be of the oxygen barrier
type and be the correct class (to BS 7291-1) for the application
concerned.
On either sealed or open-vented systems; where plastic pipe is
used a minimum of ONE metre of copper pipe (or as per pipe
manufacturers instructions) MUST be connected between both the
boiler flow and return connections and the plastic pipe.
NOTE
Do not connect plastic pipe directly to the
boiler.
Grant IRL does not accept any responsibility for any damage,
however caused, to plastic piping or fittings.
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.
Plastic pipe must be Class S to BS 7291-1.
WARNING
When plastic pipe is used, the system MUST
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
IRL (product code: ZPRESSURESWITCH).
UNDERFLOOR PIPEWORK
Plastic pipe may be used on underfloor floor 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.
4.6 CONNECTIONS
4.6.1 FLOW AND RETURN CONNECTIONS
Refer to Section 5.
4.6.2 CONDENSATE CONNECTION
Grant Vortex boilerhouse combi boilers are supplied with a factory-
fitted condensate trap to provide the required 75 mm water seal in
the condensate discharge pipe from the boiler.
Refer to Section 6 for details of the condensate disposal pipework.
4.6.3 DRAIN COCK
A drain cock is fitted at the bottom on the front of the boiler to allow
the heating system to be drained.
4.7 PREPARATION FOR INSTALLATION
1. Carefully remove the packaging from the boiler and remove it
from the transit pallet.
2. Pull the front panel forward at the top to disengage the fixing
clips then lift it up and off the boiler. Remove the literature
pack.
3. Lift off the case top panel(s) and remove the water connecting
fittings.
4.8 INSTALLING THE BOILER
1. Having decided upon the position of the boiler and type of
flue, prepare the wall as described in Section 9. Ensure that the
flue terminal position complies with the necessary clearances.
2. Make the water connections as described in Section 5.
If access will be restricted, make any connections to the
boiler before placing it in its final position. Refer to Section
7 if the boiler is to be used on a sealed system. Ensure the
requirements are met for the disposal of condensate as
described in Section 6.
3. Connect the power supply as described in Section 8.
4. Connect the flue and ensure there is an adequate air supply as
described in Section 9.
4.9 FILLING THE HEATING SYSTEM
Refer to Section 7.2 (Filling the Sealed System)
Page 17

4.10 BEFORE COMMISSIONING
To avoid the risk of contamination of dirt and foreign bodies in the
boiler, the entire heating network must be completely flushed before
the boiler is connected, then again after the heating circuit has
been heated for the first time and either still hot. This is particularly
important when the boiler is used with an existing heating
installation.
IMPORTANT:For optimal performance after installation, this boiler
and its associated heating circuit must be emptied in accordance
with the guidelines given for water treatment in hot water central
heating systems. This involves the use of a heating circuit cleaner.
After cleaning, it is extremely important that all traces of the
cleaning agent are carefully removed from the circuit (abundant
rinsing).
For long-term protection against corrosion and scale, it is
recommended, after washing, to use an inhibitor in accordance with
the recommendations.
If the boiler is installed in a garage or outside, if frost protection
conditions are not guaranteed or if the boiler is left off during the
heating period (holiday home, etc.) in order to provide additional
protection in in the event of a power failure in cold weather, an
antifreeze and a corrosion inhibitor must be combined (MGP
Neutragard type, Sentinelle X500 or equivalent, it must include
inhibitors).
Failure to follow these guidelines will void the warranty.
4.11 END OF THE WORKS
1. Please make sure that the BOILER PASSPORT - report
commissioning the installation supplied with the boiler - is
completely filled.
2. Leave a copy for the user
3.Keep a copy.
4. Make sure that the user manual (supplied with the boiler) is given
to the owner or user of the boiler.
5. Inform the user of the operation of the boiler, boiler controls,
heating controls and safety devices.
6. Make sign at the bottom of the last page of the User manual to
validate that the user training has been carried out.
If several heating starts, the use of a primary boiler circulator
associated with a separating bottle is highly recommended add.
4-way hydraulic modules are recommended by GRANT.
Refer to chapter 2.5 for the size and type of the connections and to
chapter 5 for the position of the connections.
4.12 HEATING CIRCUITS WITH
UNDERFLOOR HEATING
In heating circuits with floor heating transmitters, it is essential
that the boiler return temperature is maintained above 40 ° C to
avoid internal corrosion of the boiler’s heating body. (see pdf:
REGULATION GRANT 850i4)
4.13 UNDERFLOOR PIPING
If PER BAO or MULTI-LAYER plastic pipes can be used for
underfloor heating, copper pipes must be used for at least the first
flow meter return from the primary piping between the boiler and
the underfloor mixing valves.
Grant IRL strongly recommends installing a
Grant Mag One magnetic filter (or equivalent
*) in the piping of the heating installation. This
must be installed and regularly maintained
in accordance with the filter manufacturer’s
instructions.
* As measured by Gauss. The MagOne
magnetic filter has a Gauss value of 12000.
The boiler must not be allowed to operate with
return temperatures below 40 ° C when the
heating circuit is in normal operating mode
(after ignition and T ° rise of the boiler with
heating of the circuits)
The first meter of piping connected to both the
boiler heating flow / return circuit must be
made of copper on all types of circuits - with
closed vessel or open vessel.
Boiler Installation Information
NOTE
NOTE
CAUTION
Page 18

.
5 PIPE CONNECTIONS
Pipe Connections
Item Description
1Heating Return (22mm copper)
2Heating Flow (15mm copper)
3High Limit Stat Reset
4Direct Hot Water-OUT
5Pressure Release Valve (15mm copper)
6Cable Entry
7Cold Mains
1
2
7
6
5
3
4
Figure 5-1: Pipe connections for 18kW 24kW & 32kW
Page 19

6 CONDENSATE DISPOSAL
Pipeline Condensate Disposal
NOTE
6.1 GENERAL REQUIREMENTS
When in condensing mode the Grant Vortex Boilerhouse Combi
boilers produce condensate from the water vapour in the flue
gases.
This condensate is moderately acidic with a pH value of around
3.27 (similar to orange juice).
Provision must be made for the safe and effective disposal of this
condensate.
Condensate can be disposed of using one of the following methods
of connection:
Internal connection (preferred option)
• into an internal domestic waste system (from kitchen sink,
washing machine, etc.)
• directly into the soil stack
External connection
• into an external soil stack
• into an external drain or gulley
• into a rainwater hopper (that is part of a combined system
where sewer carries both rainwater and foul water)
• purpose made soakaway
All condensate disposal pipes must be fitted with a trap - whether
they are connected internally or externally to a domestic waste
system/soil stack or run externally to a gully, hopper or soakaway.
6.2 CONNECTIONS
Connections into a rainwater hopper, external drain or gulley
should be terminated inside the hopper/drain/gulley below the
grid level but above the water level.
CAUTION
Condensate disposal pipes must not be
connected directly into rainwater downpipes
or to waste/soil systems connected to septic
tanks.
Condensate should not be discharged into ‘grey water’ systems that
re-use water used in the home (not including water from toilets).
It should be noted that connection of a condensate pipe to the drain
may be subject to local Building Control requirements.
6.3 PIPEWORK
Condensate disposal pipework must be plastic (plastic waste or
overflow pipe is suitable).
Copper or steel pipe is NOT suitable and MUST
NOT be used.
Condensate disposal pipes should have a minimum ‘nominal’
diameter of 22 mm (¾) - e.g. use 21.5 mm OD polypropylene
overflow pipe.
Condensate disposal pipes must be fitted with a fall (away from the
boiler) of at least 2.5° (~45 mm fall per metre run).
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. for boilers installed in a
basement), it will be necessary to use a
condensate pump.
NOTE
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.
6.4 EXTERNAL PIPEWORK
Ideally, external pipework, or pipework in unheated areas, 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 ice blocking the pipe in freezing conditions.
The number of bends, fittings and joints on external pipes should be
kept to a minimum to reduce the risk of trapping condensate.
NOTE
For boilers installed in an unheated area such
as a loft, basement, outhouse or garage, all
condensate pipework should be as ‘external’.
The pipework should be insulated using
suitable waterproof and weather resistant
insulation.
Figure 6-1: Purpose made condensate soakaway
Ground level
32 mm waste pipe external to the building
Minimum 2.5 fall
O
25 mm
300 mm
400 mm
min.
Two rows of 3 x 12 mm
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
Page 20