Grant VortexBlue VTXBF21 User guide

UK | DOC 0108 | Rev 2.5 | June 2018
Grant UK VortexBlue
Internal, Internal System, External, Combi and
External Combi Blue Flame Oil Boiler Range
Supplementary User, Installation and Servicing Instr uctions

GRANT ENGINEERING (UK) LIMITED
Hopton House, Hopton Industrial Estate, Devizes, Wiltshire, SN10 2EU
Tel: [phone] Fax: [phone]
Email: [email protected] 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This manual is accurate at the date of printing but will be superseded and should be disregarded if specifications and/or appearances are changed in the interests of continued product improvement.
However, no responsibility of any kind for any injury, death, loss, damage or delay however caused resulting from the use of this manual can be accepted by Grant Engineering (UK) Limited, the
author or others involved in its publication.
All good sold are subject to our official Conditions of Sale, a copy of which may be obtained on application.
© Grant Engineering (UK) Limited. No part of this manual may be reproduced by any means without prior written consent.
IMPORTANT NOTE FOR INSTALLERS
These instructions are intended to guide Installers on the
installation, commissioning and servicing of the Grant Vortex 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:
! WARNING !
Warning of possible human injury as a consequence of not
following the instructions in the warning.
! CAUTION !
Caution concerning likely damage to equipment or tools
as a consequence of not following the instructions in the
caution.
! NOTE !
Used for emphasis or information not directly concerned
with the surrounding text but of importance to the reader.
PRODUCT CODES COVERED
These instructions cover the following product codes:
VTXBF21, VTXBF26, VTXBF36, VTXSBF21, VTXSBF26,
VTXSBF36, VTXBFCOMBI21, VTXBFCOMBI26,
VTXBFCOMBI36, VTXBFOMCOMB21, VTXBFOMCOMB26 and
VTXBFOMCOMB36
These supplementary Instructions must be read in
conjunction with the Vortex boiler Installation Instructions
supplied with the boiler.
SERVICING
The boiler should be serviced at least every twelve months.
FUEL TYPE
All Grant Vortex boilers are suitable for use with Class C2
Kerosene. To use Bio-Kerosene (B30K), refer to the information
below:
OPERATION ON BIO-FUEL
All Grant Vortex condensing boilers manufactured since May
2011 are suitable for 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exible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,lters,isolatingvalves,re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uesystemwithGrantUK.
• Use only bio-kerosne (B30K) that conforms to OPS24.
IMPORTANT:
Under no circumstances, should the boiler be used with
bio-kerosene without the above actions being taken
rst.

Contents Page 03
Contents
1 User Instructions 4
1.1 VortexBlue Internal, Internal 4
System Boilers and External Modules
1.2 VortexBlue Combi Boilers (Internal and 4
External models)
1.3 Control Panels 5
2 Introduction 6
2.1 Update to Main Installation Instructions 6
2.2 General 6
2.3 Low NOx Technology 6
2.4 Boiler Controls 6
2.5 Fuel Type 6
2.6 Sealed Systems 6
3 Technical Data 7
3.1 Boiler Technical Data 7
3.2 Boiler Clearances 8
3.3 Burner Settings 9
3.4 Boiler Dimensions 10
4 Installation 13
4.1 General 13
5 Electrical 13
5.1 General 13
5.2 Frost Protection 13
5.3 VortexBlue Internal and 13
Internal System models
5.4 VortexBlue External Modules 14
5.5 VortexBlue Combi Boilers and 14
External Combi Boilers
5.6 Wiring Diagrams 15
6 Commissioning 22
6.1 General 22
6.2 Ignition Electrode Setting 22
6.3 Air Damper Adjustment 22
6.4 Air Adjuster Disc - 15-21 model only 22
7 Servicing 23
7.1 General 23
8 Burner 24
8.1 General 24
8.2 Burner Features 24
8.3 Digital Control Box 25
8.4 Burner Operation 26
9 Fault Finding 28
9.1 Burner Fault Indication 28
9.2 Burner Fault Diagnostics 28
9.3 Riello RDB BLU Fault Finding Chart 29
10 Spare Parts 30
10.1 Riello RDB BLU Burner Parts List 30
10.2 Exploded View of Riello RDB BLU Burner 31
Page 03

User InstructionsPage 04
These User Instructions are intended to assist the user in the
operation of the Grant VortexBlue range of high efficiency oil fired
boilers. Please refer to the section that applies to your particular
boiler model.
1.1 VortexBlue Internal, Internal System Boilers and
External Modules
The boiler is fully automatic once switched on, providing central
heating (and also heating your domestic hot water if you have a hot
water cylinder fitted).
For guidance on how to use your Grant VortexBlue Internal boiler (or
Internal System boiler) please refer to the User Instructions for the
Grant Vortex Internal boiler.
These are to be found at the back of the Installation Instructions
supplied with the boiler.
The Grant VortexBlue Internal (and Internal System) boilers
differ from the standard version of the Grant Vortex, as
follows:
a) The use of the Riello RDB BLU blue flame burner – refer
to Section 7 (installer section) of these Supplementary
Instructions for details.
b) A new boiler control system with electronic temperature
control and LED boiler function indication.
NOTE
!
1.1.1 Boiler Controls
Please refer to the following for details of the boiler control panels.
For all other details refer to the User Instructions supplied with the
boiler.
To access the control panel, pull off the front door panel from the
boiler. The controls on the panel are as follows (refer to Figures 1-1
to 1-3 as appropriate).
• Boiler On/Off switch
This switches the boiler on and off. The boiler ON/OFF switch
incorporates a 'mains on' neon which lights when the boiler
is switched on. Please note that the 'mains on' neon does not
necessarily indicate that the burner if firing. See Boiler Indicator
Lights information in the next column.
When the ON/OFF switch is set to on, the POWER indicator LED
on the control panel will also light. This also does not necessarily
indicate that the boiler is firing.
If the ON/OFF switch is set to off the boiler will NOT supply
central heating or heat domestic hot water (if a hot water
cylinder is connected to the boiler). The built-in frost
thermostat will also not operate.
NOTE
!
• Service Switch (Ex ternal Modules only)
A Service switch is fitted to the control panel to allow the Service
Engineer to test-fire the boiler.
1 User Instructions
• Heating Thermostat
This control allows the temperature of the water leaving the boiler
to heat the radiators (and domestic hot water) to be adjusted. This
will be set by the installer to the optimum temperature for efficient
operation of the boiler. It should be left set in this position.
• Boiler Indicator Lights
These five red LEDs, located on the boiler control panel, indicate the
operating situation of the boiler as below:
PUMP Power to the system circulating pump
POWER Mains power to the boiler is switched on
DEMAND Demand for heating (and/or hot water) from the
heating system controls.
OVERHEAT Boiler overheat thermostat has operated and
switched the boiler off.
BURNER Power to the burner for it to operate.
• Overheat Thermostat (Overheat Reset)
The boiler is fitted with a safety overheat thermostat which
will automatically switch off the boiler in the case of a control
malfunction causing overheating.
• System Pressure Gauge
(Internal System models only)
This is to indicate the water pressure in the sealed heating system.
1.1.2 Lighting the Boiler
Please follow the guidance for lighting the boiler given in the User
Instructions supplied with the boiler.
If the reset push-button LED on the burner indicates a lockout (refer
to Section 8.3.3), press the reset button to attempt to re-start the
burner. If the burner then operates correctly the lockout may have
been caused by a temporary fault that has now cleared. If the
lockout persists the cause of the fault should be diagnosed and
rectified.
To operate the reset push-button it must be pressed in and
briefly held (for at least one second) before releasing.
NOTE
!
1.2 VortexBlue Combi Boilers (Internal and Ex ternal
models)
For guidance on how to use your Grant VortexBlue Combi boiler,
please refer to the User Instructions for the Grant Vortex Combi
boiler (or External Combi boiler).
These are to be found at the back of the Installation Instructions
supplied with the boiler.

User Instructions Page 05
Figure 1-1: VortexBlue Internal Control Panel
Figure 1-2: VortexBlue Internal System Control Panel
Figure 1-3: VortexBlue External Module Control Panel
1.3 Control Panels

These supplementary Instructions must be read in
conjunction with the Vortex boiler Installation Instructions
supplied with the boiler.
Both the Vortex boiler Installation Instructions and these
Supplementary Instructions must be lef t with the User on
completion of Installation and Commissioning.
NOTE
!
2.1 Update to Main Installation Instructions
These Supplementary Instructions are designed to cover the
differences between the Grant Vortex and the new Grant VortexBlue
low NOx boilers, as much of the installation, commissioning,
servicing and operation is identical to the standard Vortex boilers.
The following sections of the Vortex Installation Instructions
(supplied with the boiler) have not been changed and should be
referred to during the installation and commissioning of this boiler:
• Section 3 Oil Supply and Storage
• Section 5 Pipe Connections
• Section 6 Condensate Disposal
• Section 7 Sealed Systems
Refer to Section 2.6 of these instructions
• Section 9 Flues and Air Supply
• Section 14 Health and Safety Information
• Section 16 Guarantee
2.2 General
The new Grant VortexBlue range of high efficiency low NOx oil fired
boilers consists of 15 models including Internal, Internal System
and External Modules as well as both Internal and External Combi
boilers.
All models are available in three outputs – 21kW, 26kW and 36kW.
The Internal, Internal System and External Modules are supplied
factory set at the ma ximum outputs of 21kW, 26kW and 36kW but
can be de-rated to a lower output on commissioning if required.
Refer to Section 3.3 of these Supplementary Instructions for a full list
of all models and outputs.
2.3 Low NOx Technology
Grant VortexBlue boilers are designed to meet both the forthcoming
European Ecodesign (ErP) emissions limits due to be introduced in
September 2018, and to maintain the high efficiencies expected of
Grant Vortex oil fired boilers.
They combine the proven Grant condensing boiler technology with
the Riello RDB BLU compact low NOx blue flame burners.
Grant VortexBlue boilers can be used with all the Grant flue system
options available for the standard Vortex boilers. Refer to the
Installation Instructions supplied with the boiler for details.
2 Introduction
2.4 Boiler Controls
2.4.1 Combi Boilers
The Grant VortexBlue Combi boilers (internal and external) have
the same electronic control system as fitted to the standard Vortex
Combi models.
All wiring details for external controls (programmers, room
thermostats, etc.) are given in Section 8 of the Vortex Combi
Installation Instructions provided with the boiler.
2.4.2 Internal boilers and External Modules
The Grant VortexBlue Internal boilers and External Modules
incorporate a new electronic control system based on the one used
in the Grant Vortex Pro Combi boilers.
This uses an electronic boiler thermostat and has LED lights to
indicate the operating status of the boiler. For details on how to
operate the boiler please refer to Section 1.
Refer to Section 5 of these Supplementary Instructions for further
details and electrical connection diagrams.
A service switch is fit ted to the control panel of the external
modules to allow the service engineer to test-fire the boiler.
When set to 'ON' the switch temporarily by-passes the
external control system to operate the boiler.
This is a 'momentary' or non-latching switch that cannot be
left set to 'ON'. The boiler will automatically revert to normal
operation when 15 minutes have elapsed since it was last
operated.
If required, this 15 minute override period can be stopped by
switching the boiler ON/OFF switch 'OFF' and then back to
'ON'.
The boiler will then operate as normal under control of the
external heating/hot water controls (timer, room thermostat
or programmer).
NOTE
!
2.5 Fuel Type
All VortexBlue boilers are designed for use with Kerosene (Class C2)
only.
The use of any other fuel, e.g. Gas Oil (Class D), is not permitted
with any of the VortexBlue boilers and may invalidate the product
guarantee.
2.6 Sealed Systems
The following sealed system kits are available for the external
modules:
VortexBlue External Grant UK product code
VTXBFOM21
VTXOMSSKIT26
VTXBFOM26
VTXBFOM36 VTXOMSSKIT46
Section 2: IntroductionPage 06

Section 3: Technical Data Page 7
3.1 Boiler Technical Data
3.1.1 Internal, Internal System and External
Table 3-1: Internal, Internal System and External Technical Data
Units Internal and Internal System External
21 26 36 21 26 36
Output (Kerosene)
kW 15-21 21-26 26-36 15-21 21-26 26-36
Btu/h 51,200 -
71,00
71,700 -
88,700
88,700 -
123,000
51,200 -
71,00
71,700 -
88,700
88,700 -
123,000
Water content
litres 19 19 21 19 19 21
gall 4.2 4.2 4.7 4.2 4.2 4.7
Weight (dry)*
kg 130 130 144 143 143 162
lbs 287 287 318 315 315 357
Heating system flow connection mm 22 22 28 22 22 28
Heating system return connection mm 22 22 28 22 22 28
Minimum flow rate (∆T=10°C) l/h 1,800 2,200 3,000 1,800 2,200 3,000
Minimum flow rate (∆T=20°C) l/h 900 1,100 1,500 900 1,100 1,500
Condensate connection 22 mm (only connect plastic pipe)
Flue diameter (conventional) 100 mm (4 inches)
Waterside resistance (∆T=10°C) mbar 26
Waterside resistance (∆T=20°C) mbar 9.5
Maximum static head m 28
Minimum circulating head m 1
Boiler thermostat range °C 65 to 78
Limit (safety) shut off temperature °C 111±3
Maximum hearth temperature °C Less than 50
Electricity supply ~230V 1ph 50Hz 5A fused
Burner motor power W 90
Absorbed motor power W 0.15
Starting current A 2.0
Running current A 0.85
Oil connection ¼" BSP male (on end of flexible fuel hose)
Conventional flue draught
N/m² Minimum: 8.7 - maximum: 37
in wg Minimum: 0.035 - maximum: 0.15
Maximum operating pressure - sealed/open system bar 2.0
Maximum operating pressure - pressure relief valve bar 2.5
* Weight includes burner but excludes flue.
3 Technical Data

Section 3: Technical DataPage 8
3.1.2 Internal Combi and External Combi
Table 3-2: Internal Combi and External Combi Technical Data
Units Internal Combi Ex ternal Combi
21 26 36 21 26 36
Output (Kerosene)
kW 21 26 36 21 26 36
Btu/h 71,700 88,700 123,000 71,700 88,700 123,000
Water content (including 32 litre primary store)
litres 48.5 48.5 53.5 48.5 48.5 53.5
gall 10.7 10.7 11.8 10.7 10.7 11.8
Weight (dry)*
kg 160 177 200 181 206 225
lbs 353 390 441 399 454 496
Maximum heat output (Kerosene)
kW 21 26 36 21 26 36
Btu/h 71,700 88,700 123,000 71,700 88,700 123,000
Heating system flow and return connections mm 22 22 28 22 22 28
Cold water mains inlet mm 15 15 22 15 15 22
Domestic hot water outlet mm 15 15 22 15 15 22
Minimum flow rate ∆T=10°C l/h 1 800 2 200 3 000 1 800 2 200 3 000
Minimum flow rate ∆T=20°C l/h 900 1 100 1 500 900 1 100 1 500
Condensate connection 22 mm plastic pipe
Flue diameter (conventional) 100 mm (4 inches)
Waterside resistance ∆T=10°C mbar 28.5 28.5 26 28.5 28.5 26
Waterside resistance ∆T=20°C mbar 10.0 10.0 9.5 10.0 10.0 9.5
Boiler stat range °C 65 to 78
Limit stat shut off temperature °C 111±3
Maximum hearth temperature °C Less than 50
Electricity supply 230/240V 1ph 50Hz fused at 5A
Burner motor power W 90
Absorbed motor power W 0.15
Starting current A 2.0
Running current A 0.85
Oil connection ¼" BSP male (on end of flexible fuel hose)
Conventional flue draught
N/m² Minimum: 8.7 - maximum: 37
in wg Minimum: 0.035 - maximum: 0.15
Maximum operating pressure - pressure relief valve bar 2.5
* Weight includes burner but excludes flue
3.2 Boiler Clearances
Adequate clearance must be left for servicing the boiler.
For guidance on the clearances required, please refer to the 'Boiler Location' information given in the 'Installation Information' section of the
Installation Instructions supplied with the boiler.

Section 3: Technical Data Page 9
3.3 Burner Settings
Table 3-3: Burner settings
Boiler models
(burner type)
Heat output
Nozzle
Oil
pressure
(bar)
Smoke
No.
Burner
head
type
Burner
head/
air disc
setting
Fuel
ow rate
(kg/h)
Flue gas
temp.
(°C)
CO2
(%)
Flue
gas
VFR ‡
(m³/hr)
(kW) (Btu/h)
Internal 21
Internal System 21
External 21
(RDB2.2 BG1 BLU 21)
15.0 51,200 0.40/80°ES 9.0 0 - 1 BG1 B 1.25 65 - 75 12.0 16.0
18.0 61,400 0.55/80°ES 8.0 0 - 1 BG1 N/A 1.50 65 - 75 12.0 20.0
21.0 * 71,700 0.60/80°ES 8.5 0 - 1 BG1 N/A 1.75 70 - 80 12.0 23.0
Internal 26
Internal System 26
External 26
(RDB2.2 BG2 BLU 26)
21.0 71,700 0.60/80°ES 8.5 0 - 1 BG2 N/A 1.75 60 - 65 12.0 23.0
23.0 78,500 0.65/80°ES 8.5 0 - 1 BG2 N/A 1.91 65 - 70 12.0 25.5
26.0 * 88,700 0.65/80°ES 10.0 0 - 1 BG2 N/A 2.16 75 - 80 12.0 28.5
Internal 36
Internal System 36
External 36
(RDB2.2 BG3 BLU 36)
26.0 88,700 0.65/80°ES 10.0 0 - 1 BG3+ N/A 2.16 67 - 70 12.0 28.5
31.5 * 107,5 0 0 0.85/80°ES 9.0 0 - 1 BG3+ N/A 2.62 70 - 75 12.0 34.5
36.0 123,000 0.85/80°ES 11.0 0 - 1 BG3+ N/A 2.99 75 - 80 12.0 39.5
Internal Combi 21
External Combi 21
(RDB2.2 BG1 BLU 21)
21.0 71,700 0.60/80°ES 8.5 0 - 1 BG1 N/A 1.75 70 - 80 12.0 23.0
Internal Combi 26
External Combi 26
(RDB2.2 BG2 BLU 26)
26.0 88,700 0.65/80°ES 10.0 0 - 1 BG2 N/A 2.16 75 - 80 12.0 28.5
Internal Combi 36
External Combi 36
(RDB2.2 BG3 BLU 36)
31.5* 107,5 0 0 0.85/80°ES 9.0 0 - 1 BG3+ N/A 2.62 70 - 75 12.0 34.5
36.0 123,000 0.85/80°ES 11.0 0 - 1 BG3+ N/A 2.99 75 - 80 12.0 39.5
Notes:
† Refer to Section 10.2 (Burner Settings: RDB2.2 BX burners)
‡ FluegasVFR:Fluegasvolumetricowrate
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 and Bio Kerosene are NOT suitable for use with Grant VortexBlue boiler range
4. The flue gas temperatures given above are ± 10%.
5. When commissioning, the air damper must be adjusted to obtain the correct CO2level.
6. * Factory settings: 15-21 - 21kW, 21-26 - 26kW, 26-36 - 31.5kW, Combi 36 - 31.5kW
7. When setting the 15-21 to 15kW, the burner air adjuster disc (Grant UK product code: RBS215) must be fitted and positioned to disc setting B. Refer to
Section 6.4. This disc is NOT supplied with the boiler but can be obtained free-of-charge by contacting Grant UK.
8. The installer must amend the boiler data label if the output is changed.

Section 3: Technical DataPage 10
3.4 Boiler Dimensions
All dimensions in the following diagrams are in millimetres.
Alternative
condensate
drain outlets
FRONT VIEW
470
860
LEFT SIDE
VIEW
813
759
709
587
352
18
17
110
30 Flue centre line
RIGHT SIDE VIEW
PLAN VIEW
470
603 11 0
Safety valve
Cold fill
Flow - 22mm push-fit
170
Flue
spigot
Figure 3-4: VortexBlue Internal 21, Internal 26, Internal System 21 and Internal System 26 dimensions
Safety valve
Flow - 28mm push-fit
Cold fill
61
170 61
LEFT SIDE VIEW
455
555
311
24
115
63 63
Flue centre line
RIGHT SIDE VIEW
PLAN VIEW
470
603 150
FRONT VIEW
470
900
205
Flue
spigot
Alternative
condensate
drain outlets
Figure 3-5: VortexBlue Internal 36 and Internal System 36 dimensions