Misc/1522 Wood Pellet Manual May 2013::

Misc/1522 Wood Pellet Manual May 2013::
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Grant Spira 6-26 kW and 9-36 kW
Condensing Wood Pellet Boiler
Installation & Servicing Instructions
Part No. DOC 42 Rev 01. May 2013
Important Note
Important Note for Installers
After installing the boiler leave these
instructions with the Appliance.
Leave the user manual with the
householder.
Important Note
This appliance is deemed a controlled
service and specific regional statutory
requirements may be applicable.
2
GRANT ENGINEERING (UK) LIMITED
Hopton House, Hopton Industrial Estate, Devizes, Wiltshire SN10 2EU
Tel: 01380 736920 Fax: 01380 736991
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This manual is accurate at the date of printing but will be superseded and should be disregarded if specifications and/or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.
All good sold are subject to our official Conditions of Sale, a copy of which may be obtained on application.
© Grant Engineering (UK) Limited 2013. No part of this manual may be reproduced by any means without prior written consent.
Contents
1.1
4
7 Flue System and
Air Supply
11 Boiler Servicing
11.1 General
24
11.2 Checks Before Servicing
53
11.3 Heating System
53
11.4 Flue System
53
5
7.1
Air Supply
1.2
Boiler Description
5
7.2
1.3
Boiler Models
5
Flue Position and
Clearances
24
1.4
Boiler Components
6
7.3
Flue System Assembly
25
1.5
Boiler Cleaning and Servicing 7
7.4
Flue Notice Plate
27
7.5
Carbon Monoxide Alarm
27
7.6
Flue System Components
28
7.7
Flue Component
Dimensions
30
Typical Flue Systems
31
2 Technical data
2.1
2.2
2.3
2.4
8
Boiler & Hopper
Technical Data
8
Boiler Input and
Output Data
9
Flue Gas Analysis
7.8
9
Boiler and Hopper
Dimensions and Clearances 10
3 Pellet Specification
& Storage
13
3.1
Pellet Specification
13
3.2
Pellet Storage
14
4 Installation information
16
8 Electrical
8.1
32
8.3
Boiler Plug Connections
32
8.4
8.5
8.6
4.2
Boiler Location
16
9.1
4.3
Preparation for Installation
16
4.4
Installing the Boiler
16
4.5
Regulations
16
4.6
Heating System Design
Considerations
16
4.7
Pipework Materials
16
4.8
Pipe Connections
17
4.9
Wash System Manifold
17
18
4.12 Pellet Feed Auger
18
4.13 Before you Commission
19
4.14 Completion
19
5 Condensate disposal
Heating System Controls
33
9 Burner
40
12.8 Probe Failure Thermostat
70
Burner Operational
Sequence
12.9 Air Pressure Error
71
41
9.4
Burner Display Screen
42
9.5
Burner Control Buttons
42
9.6
Burner Menu Navigation
Chart and Factory Default
Setting
43
9.7
Burner Menu
10 Commissioning
10.1 Equipment Required
13 Spare Parts
72
14 Health & Safety
Information
80
44
15 EC Declaration of
Conformity
81
47
16 Warranty
82
47
10.2 Preliminary Inspection
47
10.3 Boiler
47
50
10.9 Combustion Chamber
Draught
50
6.1
Sealed System
Requirements
10.10 Flue Gas Analysis
51
10.11 Customer Handover
51
22
10.12 Commissioning Report
Form
52
22
10.13 Commissioning Check List
52
6.2
Filling the Sealed System
22
6.3
Venting the Pump
23
6.4
Pressure Relief (Safety)
Valve Operation
23
65
Burner Operational Modes
49
6 Sealed Systems
61
62
9.3
10.8 Lighting the Boiler
21
60
12.2 Normal Screen Display
9.2
49
21
60
12.1 General
67
10.7 Priming the Pellet Feed
Auger
Inspection and Cleaning
of Trap
12 Fault Finding
69
10.6 Burner Setting
Condensate Trap
59
12.7 Servo Motor Blocked
20
5.7
59
11.13 Combustion Checks
40
20
5.6
58
11.12 Safety Device Checks
Burner Operation
Connections
20
58
11.11 Burner Settings
12.6 Failed Pellet Lighting
General Requirements
Condensate Soakaway
11.10 Condensate Disposal
System
40
5.2
5.5
58
12.4 Boiler Overheat Thermostat 64
5.1
20
57
11.9 Re-fitting Burner
34
48
20
56
11.8 Burner Components
Wiring Diagrams
48
External Pipework
11.7 Burner Brazier
12.3 No Screen Display
10.5 Safety Device Checks
Pipework
54
33
10.4 Pellet Hopper
5.4
54
11.6 Boiler
Connecting the Power
Supply
20
5.3
53
11.5 Combustion Ventilation
12.5 Pellet Tube Thermostat
16
4.11 Pellet Hoppers
32
Hopper Electrical
Connections
Introduction
17
32
8.2
4.1
4.10 Fan Box and Flue Starter
General Requirements
53
24
How the Condensing
Wood Pellet Boiler Operates
Contents
1 Introduction
3
1 Introduction
Wood Pellet Boiler
Intermediate Hopper
Boiler Controls
Pellet Feed Auger
Pellet Delivery Hose
Pellet Delivery Tube
Burner Controls
Wood Pellet Burner
Grant SPIRA Condensing Wood Pellet Boiler & Intermediate Hopper
Introduction
This manual is intended to guide
Installers who have completed the
Grant Wood Pellet Boiler Installer
training course on the installation,
commissioning and servicing of the
Grant SPIRA Condensing Wood Pellet
Boiler.
4
A separate manual is available to guide
users in the operation of the boiler.
The following special text formats are
used in this manual for the purposes
listed:
!
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
Note text: Used for emphasis or
information not directly concerned
with the surrounding text but of
importance to the reader.
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 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 SPIRA Condensing wood
pellet boiler contains an extra
(secondary) 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.
The boiler has been independently
tested to BS EN303-5 and will achieve
the following full load efficiencies when
both the boiler and system are correctly
set:
Model
Nominal
Output
Reduced
Output
SPIRA 6-26
97.4%
96.4%
SPIRA 9-36
93.1%
98.1%
Grant SPIRA condensing wood pellet
boilers will still operate at extremely
high efficiencies even when not in
condensing mode and are therefore
suitable for fitting to an existing heating
system without alteration to the radiator
sizes.
1.2 Boiler Description
The Grant SPIRA boiler uses a drop
feed type burner with modulated heat
output. The burner output is
determined by varying the feed and
pause time of the pellet feed auger
supplying pellets to the burner. See
Section 8 for details of burner operation.
The boiler is suitable for use on a
sealed or open vented central heating
system. When commissioned and set
correctly, Grant SPIRA condensing
wood pellet boilers will operate
automatically, using a typical heating
control system.
All models are supplied with the control
panel and burner factory fitted. The
combined fan box & flue starter, pellet
feed auger and hopper are supplied
separately and are fitted by the installer.
See Section 4 for boiler installation.
The boiler needs to be connected to a
conventional flue system. There is no
provision for connection to a balanced
flue system as there is draft stabilizer
fitted to the appliance.
The boiler is not designed specifically
for operation on a system with a buffer
tank/ thermal store, however when
used on such a system there is no
effect on the boiler performance.
!
NOTE
The only flue suitable for use with
the Grant SPIRA condensing wood
pellet boiler is the Grant ‘Black’
twin-wall insulated conventional flue
system. This 125mm (5”) diameter,
black powder coated stainless steel
flue system is suitable for both
6-26kW and 9-36kW Spira models.
For the 52kW, 62kW and 72kW
double boiler installations each
boiler must have a separate flue
system. Refer to Section 7.
1.3 Boiler Models
The Grant SPIRA condensing wood
pellet boiler is available in eleven
different models:
To ensure maximum efficiency from the
Grant SPIRA boiler, the boiler return
temperature should be 55°C or less
(but NOT less than 40°C) at
maximum operating temperature.
This will enable the latent heat to be
condensed out of the flue gases.
Product
Code
WPS626LH200
6-26
1 x 6-26kW boiler + 200kg left hand hopper
The boiler is capable of a maximum
flow temperature of 75°C.
WPS936RH110
9-36
1 x 9-36kW boiler + 110kg right hand hopper
WPS936LH110
9-36
1 x 9-36kW boiler + 110kg left hand hopper
To achieve the required return
temperature (55°C or less), it is
recommended that the heating system
is designed and balanced to operate
with a temperature differential of 20°C
between flow and return. The use of
modulating circulating pumps (now
widely available) and effective control
systems should be considered.
WPS936RH200
9-36
1 x 9-36kW boiler + 200kg right hand hopper
WPS626RH110
Model
Description
6-26
1 x 6-26kW boiler + 110kg right hand hopper
WPS626LH110
6-26
1 x 6-26kW boiler + 110kg left hand hopper
WPS626RH200
6-26
1 x 6-26kW boiler + 200kg right hand hopper
WPS936LH200
9-36
1 x 9-36kW boiler + 200kg left hand hopper
WPS1252
12-52
2 x 6-26kW boilers + 140kg double boiler hopper
WPS1562
15-62
1 x 6-26kW boiler and 1 x 9-36kW boiler
+ 140kg double boiler hopper
WPS1872
18-72
2 x 9-36kW boilers + 140kg double boiler hopper
Introduction
1.1 How the Condensing
Wood Pellet Boiler Operates
5
1 Introduction
1.4 Boiler Components
1.4.1 Burner. The burner is supplied
factory-fitted to the boiler. All burners
are supplied with factory default
settings. During commissioning each
burner parameter will need to be
checked (see Section 8), and adjusted
if necessary as the flue length can have
a significant effect on the boiler
performance. Refer to commissioning in
Section 9.
The Burner is equipped with a self
cleaning device to prevent a build up of
ash and clinker in the burner brazier.
The burner output is determined by the
feed / pause times of the pellet feed
auger supplying the burner. See Section
8 for full burner operation details.
1.4.2 Boiler. The SPIRA condensing
boiler is supplied with a combined
primary and secondary heat-exchanger.
Both heat exchangers are equipped
with a self cleaning system.
1.4.3 Boiler controls. The set-point
temperature of the boiler is user
adjustable via two push buttons on the
burner control panel - see Section 8.4
for details.
The boiler control panel (See Figure 1.1.)
is located at the top of the boiler and is
fitted with three controls, as follows:
ON/STAND-BY switch – to switch off
the burner when required, by
interrupting the switched live supply to
the burner. This switch does not isolate
the electrical supply to the burner.
Introduction
OVERHEAT thermostat - this allows
the boiler to be used on a sealed
central heating system and will
automatically switch off the boiler if the
pre-set temperature of 110°C is
exceeded.
6
CLEANING switch - when pressed
and held in the TEST position, it allows
the cleaning system to be manually
operated and tested. When released it
will automatically return to the default
AUTO position to allow the boiler
cleaning system to perform
automatically. Only operate the cleaning
switch when the boiler is in ‘WAIT
BOILER THERMOSTAT’.
Figure 1-1: Boiler control panel
!
WARNING
After the burner has been switched
off (either manually by the switch on
the control panel, or automatically by
the boiler control stat, or the heating
system controls) the burner needs to
burn-down the remaining pellets in
the brazier. Do not open the front
combustion chamber access door
until the burner display reads “WAIT
BOILER THERMOSTAT”.
1.4.4 Boiler Pellet Hoppers. All single
boilers (Spira 6-26 and 9-26 models)
come with a pellet hopper. Two sizes of
hopper are available for use with single
boilers, as follows:
•
110 kg hopper – for storing a
maximum of 110kg
(≈170 litres) of wood pellets
•
200kg hopper – for storing a
maximum of 200kg
(≈308 Litres) of wood pellets.
There are two versions of both the
110kg and 200kg pellet hopper
available for use with a single boiler:
Left hand hopper – to be positioned
on the left hand side of the boiler. This
is the ‘standard’ option and will be
automatically supplied with the boiler
unless specified otherwise.
Right hand hopper – to be positioned
on the right hand side of the boiler. This
is the ‘non-standard’ option and must
be specified when ordering the boiler.
Both hoppers are supplied with a single
1.2m pellet feed auger, to be fitted to
the hopper on site by the installer.
All ‘double boiler’ installations (Spira
12-52, 15-62 and 18-72 models) come
with one 'double' hopper to feed both
boilers. This hopper is positioned
between the two boilers and stores a
maximum of 140 kg (≈215 litres).
ALL the Grant pellet hoppers are for
indoor use only and must be
positioned in a dry environment.
Hopper contents switch
All hoppers are fitted with a contents
switch. This detects when the level of
pellets in the hopper falls to a pre-set
minimum value and triggers the
operation of either a bulk store auger,
or vacuum system, to delivery pellets
from the bulk pellet store.
If no bulk store is used, the contents
switch will stop the burner operating
when the minimum pellet level is
reached.
Topping up the hopper with more
pellets will automatically operate the
contents switch and the burner will
restart (if there is a demand for the
boiler to run).
The minimum quantity of pellets
required to restart the boiler is 20kg for
the single boiler hoppers and 3kg for
the double boiler hoppers.
All boiler pellet hoppers are for
indoor use only and MUST be
positioned in a dry environment free
from dampness. They must be located
on the same floor level as the boiler, or
boilers, they are supplying.
All hoppers are mounted on four
castors (with the two front castors
lockable) to allow it to be easily moved
when required. Allow sufficient area in
front of the hopper for it to be moved
out and away from the boiler(s) during
servicing.
The electrical connections to the
boiler(s) are all made to the 4-way
electrical plug on one of the three
factory-fitted ‘flying leads’ at the rear of
the hopper. Refer to Section 7 for
details.
This blanking plate has a single round
‘knock-out’ to provide an entry into the
hopper from an auger supplying pellets
from a bulk hopper system. This
knockout is positioned to ensure the
pellets drop into the hopper and
operate the hopper contents switch.
Only this opening MUST be used as
making another opening in the
intermediate hopper could affect the
operation of the contents switch.
Electrical connection for either a bulk
auger or Grant SPIRA-VAC system, if
required, is made using the 6-way
electrical plug and flying lead supplied
factory-fitted at the rear of the hopper.
Refer to Section 7 for connection
details.
Always ensure that the door and top
panel of the boiler hopper are fitted to
ensure no foreign debris enters the
hopper. If a bulk system with an auger
is fitted, ensure that the bulk auger
does not impede the opening of the
hopper door.
1.4.5 Pellet Feed Auger. All Grant
hoppers are supplied with either one or,
on double boiler hoppers, two 1.2m
pellet feed augers. These are set at a
fixed angle of 45° to maintain a
consistent feed. If the pellet feed auger
angle is altered the input to the boiler
will also be altered.
The pellet feed auger is a hollow spiral
type. Its function is to deliver the pellets
from the hopper to the burner. The
output of the boiler is determined by
varying the on/off periods of the pellet
feed auger motor. Refer to Section 2.2
for pellet feed data.
1.5 Boiler Cleaning and
Servicing
Grant SPIRA condensing wood pellet
boilers are equipped with an automatic
cleaning system for each of the two
heat exchangers and also for the
burner brazier.
!
CAUTION
The ash pan (located inside the
combustion chamber) will need to be
periodically emptied. This simple
task must be carried out by the user
at MONTHLY intervals for the FIRST
THREE MONTHS. Thereafter, the ash
pan should be emptied regularly, on
at least a monthly basis, or as
indicated by the amount of ash
found during the first three months.
Two carrying handles are supplied
with the boiler to allow removal of
the ash pan when hot.
!
WARNING
Care must be taken to avoid contact
with hot surfaces.
Always wait for the boiler to cool
down before opening the
combustion chamber door and
removing the ash pan.
The boiler MUST be serviced either
ANNUALLY or when a service is
indicated on the burner control panel
display, whichever comes first.
Servicing should only be carried out
by a Grant Approved Installer and
details of each service should be
recorded in the Service Log in the
back of the User Operating Manual.
!
NOTE
The amount of ash produced varies
between the different pellet brands
and this will affect the frequency of
cleaning and maintenance required.
Introduction
All hoppers are supplied with a
rectangular blanking plate fitted on the
top rear panel. This can be removed, as
required, to allow the fitting of the Grant
SPIRA-VAC pellet feed system. Refer to
Installation Instructions supplied with
the Grant SPIRA-VAC system for further
details.
7
2 Technical Data
2.1 Boiler & Hopper Technical Data
Spira Model
Model Number
Maximum heat Output
9-36
kW
26
36
88,700
122,800
Flow connection
-
1" BSP (Female)
1 1/4" BSP (Female)
Return connection
-
1" BSP (Female)
1 1/4" BSP (Female)
Water content
Litres
51.5
Waterside resistance ΔT = 10°C
mbar
Waterside resistance ΔT = 20°C
mbar
9.5
bar
1 bar operating pressure
-
11/4" BSP (Female)
Condensate connection
Conventional flue
60
26.0
-
125mm (5") Black system
mbar
0.10 to 0.15 (running)
Maximum static head
m
25
Minimum circulating head
m
1
Boiler temperature set point range
°C
55° to 75°C
Boiler temperature cut out point
°C
65° to 80°C
Minimum return temperature
°C
40°C
Water system overheat cut-out temp.
°C
110°C
Burn-back overheat thermostat cut-out
°C
60°C
-
230V~50Hz
Combustion chamber draught requirement
Electricity supply
Max operating pressure - sealed system
bar
2.5 bar
Max operating pressure - open system
bar
2.5 bar
Maximum auger length (bulk hopper)
metres
6.0
Maximum auger speed (bulk hopper)
rpm
30
Minimum flue length
m
2.0
Maximum flue length
m
12.0
Heating element rating
Watts
450
Intermediate auger motor power
Watts
55
Intermediate auger motor starting current
Amps
0.64
Intermediate auger motor running current
Amps
0.64
rpm
8.1
Intermediate auger speed
Technical Data
6-26
Btu/hr
Mains water (cleaning system)
8
Units
Flue fan motor power
Watts
32
Flue fan motor starting current
Amps
0.27
Flue fan motor running current
Amps
0.13
Cleaning solenoid power
Watts
10
Cleaning solenoid current
Amps
0.087
Burner fan motor power
Watts
56
Total burner start current
amp
2.5
Total burner run current
amp
0.60
Boiler and Hopper Weights
The settings in the table below are
based on the boiler using the Grant
fixed angle pellet feed auger at 45° with
an auger motor fixed speed of 8.1 rpm.
Only ENplus A1 (EN14961-2) pellets
MUST be used with the Grant SPIRA
boilers. These pellets must be bark
and sand free AND approved by
Grant UK BEFORE being used in the
Spira boilers. Failure to use approved
pellets will invalidate the product
warranty.
2.2.1 Burner settings
All burner settings must be checked as
part of commissioning and servicing.
Refer to Section 9.6 for full details of
the burner settings and how to access,
check and, where necessary, how to
adjust them.
2.3 Flue Gas Analysis
As part of both the commissioning and
servicing procedures, the CO2 content
of the flue gases must be checked. To
enable this to be done, the boiler is
supplied with a combustion test point in
the top rear cleaning door. Refer to
Figure 10-17.
To gain access to this test point, first
remove the top casing panel from the
boiler. The test point should be at the
back left corner of the rear cleaning
door. If it is located at the front right
corner of the cleaning door, then
remove the door and refit it with the
test point in the correct position.
Spira Model
Model Number
Units
6-26
Weight boiler – less burner and fan box (empty)
kg
201
231
Weight burner
kg
25.5
25.5
Weight fan box
kg
5
5
Total weight of boiler (empty)
kg
231.5
261.5
Total weight of boiler (full)
kg
283
321.5
Weight 110kg pellet hopper (empty) – incl. auger
kg
41.35
41.35
Weight 110kg pellet hopper (full) – incl. auger
kg
151.35
151.35
Weight 200kg pellet hopper (empty) – incl. auger
kg
77
77
Weight 200kg pellet hopper (full) – incl. auger
kg
277
277
Weight of auger
kg
8.35
8.35
Weight 140kg double pellet hopper (empty)
– incl. 2 augers
kg
42
42
Weight 140kg double pellet hopper (full)
– incl. 2 augers
kg
182
182
!
!
NOTE
Use only a calibrated flue gas
analyser with a ‘Wood Pellet’ fuel
setting. Setting the fuel to anything
other than wood pellets will give an
incorrect reading.
!
CAUTION
CAUTION
Do not sample the flue gases
through either the draught stabiliser,
or from within the flue, as they will
have been diluted with air entering
through the draught stabiliser.
Only use the combustion test point
in the top rear access door to check
the CO2 content of the flue gases.
See Fg. 10-17.
To ensure correct combustion, the
burner settings given in the table
above must NOT be changed unless
instructed to do so by Grant UK.
Model
MAX Flame
Pellet
feed
Burner setting
9-36
Heat
Output
MIN Flame
Heat
Input
Draught
CO2
%
Auger
TIME
TIME
kW
kW
Full
Input
mbar
angle
LOAD
PAUSE
(Btu/h)
(Btu/h)
Eff.
kg/hr*
(in.wg)
MAX
Burner
Setting
Heat
Output
TIME
kW
PAUSE
(Btu/h)
MIN
SPIRA
6-26
45°
0025
(2.5sec)
0025
(2.5sec)
26.3
(89,735)
27.1
(92,500)
97.4
5.70
0.1–0.15 10–12
(0.04-0.06)
0140
(14.0sec))
6.5
(22,100)
SPIRA
9-36
45°
0065
0025
(6.5sec) (2.5 sec)
36
(122,832)
38.7
(132,000)
93.1
7.78
0.1–0.15 10–12
(0.04-0.06
in.wg)
0250
(25sec)
9
(30,700)
Technical Data
2.2 Boiler Input and Output
Data
1. *Heat input is based on a calorific value of 4.81 kWh/kg.
2. Heat input and output data given above is approximate only.
9
2 Technical Data
2.4 Boiler and Hopper
Dimensions and Clearances
2.4.1 Single Boiler with Left Hand Hopper
Front
View
Side View
Rear View
Plan
View
Technical Data
10
Spira Wood Pellet Boiler
Model
Dimensions
A
B
C
D
E
F
G
H
6-26 110kg left hand hopper
1056
518
513
177
96
661
1160
1120
6-26 200kg left hand hopper
1256
618
713
125
44
713
1160
1120
9-36 110kg left hand hopper
1056
518
513
277
196
661
1260
1220
9-36 200kg left hand hopper
1256
618
713
225
144
713
1260
1220
If the measurement from the flue centre line to the rear wall is increased (shown as 134 in the plan view), then the dimensions D, E & G will have to be
increased by the same increment. All units in millimeters
Figure 2-1: Boiler and hopper dimensions and clearances – single boiler with left hand hopper
2.4.2 Single Boiler with Right Hand Hopper
Front View
Side View
Rear View
Plan View
Spira Wood Pellet Boiler
Model
Dimensions
A
B
C
D
E
F
G
H
6-26 110kg right hand hopper
1056
518
513
177
96
661
1160
1120
6-26 200kg right hand hopper
1256
618
713
125
44
713
1160
1120
9-36 110kg right hand hopper
1056
518
513
277
196
661
1260
1220
9-36 200kg right hand hopper
1256
618
713
225
144
713
1260
1220
If the measurement from the flue centre line to the rear wall is increased (shown as 134 in the plan view), then the dimensions D, E & G will have to be
increased by the same increment. All units in millimeters
Figure 2-2: Boiler and hopper dimensions and clearances – single boiler with right hand hopper
Technical Data
11
2 Technical Data
2.4.3 Double Boiler with Central Hopper
Front View
Side View
Plan View
Rear View
Spira Wood Pellet Boiler
Technical Data
Model
12
Dimensions
A
B
C
D
E
F
G
H
12-52 with double hopper
1792
616
697
224
141
616
1160
1120
15-62 with double hopper
1792
616
697
324
241
616
1260
1220
18-72 with double hopper
1792
616
697
324
241
616
1260
1220
If the measurement from the flue centre line to the rear wall is increased (shown as 134 in the plan view), then the dimensions D, E & G will have to be
increased by the same increment. All units in millimeters
Figure 2-3: Boiler and hopper dimensions and clearances – double boiler with central hopper
3 Pellet Specification, Storage & Delivery
3.1 Pellet Specification
Grant SPIRA boilers are designed to
run on EN Plus A1 wood pellets that
comply with EN 14961 and meet the
following of criteria:
Key Parameter
Limits
Category as per
EN 14961
Diameter
6mm
Average length
L<5 x diameter
Minimum and maximum length
3.15 to 40mm
Moisture Content
<10%
S0.05
Mechanical durability
>97.5%
DU 97.5
Amount of fines
<1.0%
F1.0
Additives
None
Nitrogen
<0.3%
D06,
N0.3
Nett calorific value
4.8 to 5.2 kWh/kg
Bulk density
≈ 650 kg/m3
Chlorine
<0.03%
CL 0.03
Additives
Additives are used to improve the stability of the pellets. If manufactured correctly, and of a sufficiently low
moisture content, quality pellets will require no additives.
Ash
Ash represents the non-combustible content of the pellet. Higher ash content reduces the calorific value of
the pellet and requires the appliance to be cleaned more frequently.
Average Length
To provide a predictable flow of fuel into the burner, the recommended length of a pellet is deemed greater
than 5mm and less than 5 times the diameter.
Bulk Density
Bulk density is the ratio between the weight of the pellet and the amount of space they take up. A good
quality pellet will have a density of 650 kg/m3.
Chlorine
High levels of chlorine in the flue gases emissions can give rise to corrosion.
Diameter
The most common diameter is 6mm with some 8mm also available. This boiler is designed for 6mm only.
Fines
Pellets are made from compressed wood. As pellets rub together they can break down slightly, producing
dust or fines. Too many fines indicate a poor quality pellet and can impede pellet flow in addition to
causing dust problems when delivering and storing the pellets.
Mechanical Durability
This is a measure of how stable the pellet is and how likely it is to produce fines from normal handling.
A high durability percentage is an indicator of a good quality pellet.
Moisture Content
Moisture affects the calorific value of the pellet. Low moisture content guarantees constant and predictable
combustion efficiency. Higher moisture contents can result in pellet breakdown.
Net Calorific Value
This is the useful energy contained in a kilogram of fuel. This value is affected by the amount of noncombustible materials (ash) and the moisture content of the pellet. Typical values range from 4.8 kWh/kg
to 5.2 kWh/kg.
Nitrogen
High levels of nitrogen in the flue gases emissions can give rise to corrosion.
Sulphur
High levels of sulphur in the flue gases emissions can give rise to corrosion.
Pellet Specification,
Storage & Delivery
The following terms are commonly used when describing the properties of wood pellets:
13
3 Pellet Specification, Storage & Delivery
3.2 Pellet Storage
3.2.1 Pellet Hoppers & Pellet
Feed Auger
All Grant SPIRA boilers are supplied
with a pellet hopper. Refer to Section
1.4.4 for further details of the hoppers.
All Grant hoppers are supplied with
either one or, on a double boiler hopper,
two 1.2 m pellet feed augers, to deliver
the pellets from the hopper to the
boiler. Refer to Section 1.4.5.
The pellet hopper, along with the boiler
(or boilers) it is supplying, MUST be
installed in a dry indoor environment
free from dampness. The hopper and
boiler(s) must be located on the same
floor level.
If a bulk hopper is to be used, there are
two methods of transferring the pellets
from the bulk store to the intermediate
hopper:
a) Via a bulk pellet feed auger
b) Via the Grant SPIRA-VAC vacuum
pellet feed system
All boiler pellet hoppers are supplied to
accept either of these two pellet supply
systems, as required. Refer to Section
1.4.4 for further details on the hoppers.
The electrical connections to the
boiler(s) are all made to the 4-way
electrical plug on one of the three
factory-fitted ‘flying leads’ at the rear of
the hopper. Refer to Section 7 for
details.
Pellet Specification,
Storage & Delivery
Electrical connection for either a bulk
auger or Grant SPIRA-VAC system, if
required, is made using the 6-way
electrical plug and flying lead supplied
factory-fitted on the hopper.
14
Figure 3-1: Bulk auger inlet in hopper
3.2.2 Bulk Hopper
It is advisable to fit a bulk pellet store to
take advantage of the lower cost of
pellets purchased in bulk.
f)
The pellet hopper must still be used,
situated between the bulk hopper and
the boiler, as the auger fitted to the
hopper delivers the precise quantity of
pellets required by the burner.
A range of suitable bulk pellet stores
are available from Grant UK. These are
supplied flat packed for on-site
assembly. Refer to assemble
instructions supplied with each kit. For
details of capacities and dimensions
contact Grant UK.
The pellet hopper also allows any
problems with bulk pellet quality to be
isolated and the intermediate hopper
can be used temporarily as the source
of pellets for the boiler.
It is essential to only use a bulk storage
unit that is:
a) Waterproof
b) Specifically designed to store wood
pellets
c) Supplied with appropriate
connections for pellet delivery,
which are within the drivers reach
d) Fitted with a vent connection (for
dust extraction) during filling
e) Permanently vented (if located
outside) or unvented (if installed
indoors)
Fitted with a rubber arrester mat
(or similar) to limit pellet damage
during filling
g) Is electrically earthed
The use of a self constructed wood
pellet storage facility should be preapproved by the fuel supplier before
any pellets are delivered and must meet
relevant building and fire regulations.
The ONORM M7137 standard should
be used as a guideline for DIY bulk
storage units.
A storage unit should not be positioned
where it would result in a fire risk.
The store should be located on a
suitable base (e.g. concrete) capable of
supporting the weight of the store when
full of pellets.
!
NOTE
Each bulk pellet supplier has clear
guidelines on the requirements of a
bulk storage hopper used to store
their pellets, together with
requirements on positioning, access,
and minimum deliveries.
ALWAYS check with the pellet
supplier you wish to use BEFORE
installing a bulk storage system.
3.2.3 Bulk Pellet Feed Auger
When installing a bulk pellet store with a
bulk pellet feed auger, consideration
must be given to the position of the
store in relation to the hopper as this
will dictate the length of the auger.
Grant UK offer a range of eight bulk
pellet augers, from 2.5m to 6m in
length in 0.5m steps, as given in the
table below:
Product
Code
Bulk Auger
Length m
Auger
Weight kg
WPAUG25
2.5m
21.3
WPAUG30
3.0m
24.1
WPAUG35
3.5m
26.9
WPAUG40
4.0m
29.7
WPAUG45
4.5m
32.5
WPAUG50
5.0m
35.3
WPAUG55
5.5m
38.1
WPAUG60
6.0m
40.9
The length of the pellet feed auger,
supplying pellets from the bulk store, is
limited to a maximum of 6 metres in
length, as a longer auger can damage
the pellets.
To determine the length of auger
required the following factors must be
determined
a) Difference in height between the
ground/floor level (on which the
store will stand) and the floor level
(on which the hopper will stand).
b) Horizontal distance between the
back of the hopper and the store.
If the store is to be situated outside this
will be
a)
b)
the distance from the rear of the
hopper to the inner face of the wall
the thickness of the wall
c) the distance to the store from the
outside face of the wall.
Refer to Figure 3-3 for further details.
New dimensioned diagram
of store & hopper here
showing key dimensions
Figure 3-3: Bulk store and auger
dimensions
Using the following table select the
required length of auger based on the
above dimensions. Always select the
next size up of auger.
Figure 3-2: Bulk hopper feeding intermediate hopper
Pellet Specification,
Storage & Delivery
New table of store and bulk
auger dimensions here
15
4 Boiler Installation Information
4.1 Introduction
4.4 Installing the Boiler
For the 6-26 and 9-36 models, the
appliance comes supplied on two
pallets
The boiler and hopper must be
positioned on a level, solid, noncombustible base of at least 125mm
thick. This must also extend past the
boiler and hopper by 225mm at the
front and 150mm on the remaining
sides. The boiler position must comply
with clearances shown in Section 2.4.
a) Pallet 1 contains the intermediate
hopper and auger
b) Pallet 2 contains the boiler, burner,
and combined fan box & flue
starter.
For the 12-52, 15-62 and 18-72
models (‘double boiler’ installations), the
appliance comes supplied on two
pallets
a) Pallet 1 contains the intermediate
hopper and augers
b) Pallet 2 contains both boilers, each
with burner and combined fan box
& flue starter.
An accessories box is packed with
each boiler and this contains the
following:
a) fan box (which comes complete
with exhaust fan and draught
stabiliser),
4.5 Regulations
Installation of a Grant SPIRA wood
pellet boiler and hopper must be in
accordance the following
recommendations:
•
•
wash pipe manifold assembly
d)
auger feed tube
Check the packing list (supplied in the
accessories carton) to ensure all items
have been delivered.
The Grant ’Black’ flue system comes
separately and its configuration will
depend on the installation requirements.
•
BS 715:2005 Metal flue pipes,
fittings, terminals and accessories.
•
BS EN 12828:2003. Heating
systems in buildings. Design for
water-based heating systems
•
BS EN 12831:2003. Heating
systems in buildings. Method for
calculation of the design heat load.
•
4.2 Boiler Location
Boiler Installation
Information
The boiler must be installed in a damp
free environment.
16
Refer to Section 2.4 for boiler and
hopper clearances. These clearances
are to allow for access during servicing.
Also if fitting a bulk hopper system refer
to Section 3.2.2 as the location of the
bulk hopper can influence the boiler
location.
4.3 Preparation for Installation
With the units on the pallet, remove all
outer packaging from the units. Unpack
the accessories box supplied with the
boiler and check the packing list
against all items present.
Model and local Water Undertaking
Byelaws.
The installation should also be in
accordance with the latest edition of the
following standards and codes of
Practice;
b) condensate drain trap items
c)
National Building Regulations and
any local Byelaws which you must
check with the local authority for
the area.
BS EN 14336: 2004. Heating
systems in buildings. Installation
and commissioning of water based
heating systems.
•
BS 7593:2006 Code of Practice for
treatment of water in heating
systems.
•
BS 7671:2008 Requirements for
electrical installations, IEE wiring
regulations.
•
ONORM M7137 standard should
be used as a guideline for DIY bulk
storage units.
!
NOTE
Failure to install and commission the
appliance correctly will invalidate the
boiler warranty.
!
WARNING
Before starting any work on the
boiler or fuel supply please read the
Health & Safety information given in
Section 13.
4.6 Heating System Design
Considerations
To achieve the maximum efficiency
possible from the Grant SPIRA wood
pellet boiler, the heating system should
be designed to the following
parameters:
Radiators
•
Flow temperature 70°C
•
Return temperature 50°C
•
Differential 20°C
Size the radiators using 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.
!
NOTE
The boiler should not be allowed to
operate with a return temperature of
less than 40°C when the system is
up to operating temperature.
The use of a pipe thermostat is
recommended to control the return
water temperature when using weather
compensating controls.
Underfloor Heating
•
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.
4.7 Pipework Materials
Grant SPIRA boilers are 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: Part 1:2001)
for the application concerned.
WARNING
On either sealed or open-vented
systems; where plastic pipe is used
a minimum of ONE metre of copper
pipe MUST be connected between
both the boiler flow and return
connections and the plastic pipe.
DO NOT CONNECT PLASTIC PIPE
DIRECTLY TO THE BOILER.
Grant UK do not accept any
responsibility for any damage,
however caused, to plastic piping or
fittings.
Drain Cock:
Fit the ½” drain cock to the bottom rear
½” BSP connection. Fit the air vent
assembly into the ½” connection on the
rear of the boiler (this is to vent the
secondary unit only), the flow pipe from
the boiler must be vented.
Condensate Connection:
The1¼” BSP female condensate outlet
connection is located at the rear of the
boiler. Refer to Section 5 for details on
condensate connection and disposal
pipework.
4.9 Wash System Manifold
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:Part1:2001.
!
WARNING
The system MUST incorporate a lowlevel 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 UK
– Part No. MPCBS62.
Refer to Figure 8.11 for the electrical
connection details on this switch.
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.
4.8 Pipe Connections
Flow and return connections:
The flow and return connection are at
the rear of the boiler (see Section 2.4)
and the sizes are as follows;
SPIRA 6-26 Flow 1” BSP Female
Return 1” BSP Female
The boiler is supplied with a cleaning
manifold system to wash the
condensing unit of any ash build up in
the tubes.
!
NOTE
A minimum running (dynamic)
pressure of 0.8 to 1.0 bar pressure
(as shown on the gauge when the
system is operating) is required to
maintain an adequate supply for
cleaning purposes.
The wash system manifold pipe is
factory fitted through the right hand
side of the boiler. This manifold pipe
can be fitted in either one of two
different positions, depending on the
location of the pellet hopper, as follows:
With hopper located on the left side
of the boiler - the wash system
manifold if fitted from the right-hand
side of the boiler, through the holes
provided in the right hand side panel of
the boiler and both sides of the heat
exchanger chamber.
With hopper located on the right side
of the boiler - the wash system
manifold if fitted from the left-hand side
of the boiler. A semi-pierced hole
(provided in the left hand side panel of
the boiler) must be pushed out to allow
the manifold to be fitted from this side.
With hopper located between two
boilers (in a ‘double boiler’ installation)
- the right hand boiler will have the
wash system manifold fitted from the
right hand side and the left hand boiler
will have the wash manifold fitted from
the left hand side.
In all cases, ensure adequate clearance
(minimum 400mm) is present for
removal of the wash system during
servicing. Refer to Section 2.4 for
clearance dimensions.
The remainder of the washdown
cleaning system consists of the
pressure gauge and solenoid valve
assembly, flexible hose, isolating valve
(with integral check valve).
Fit the gauge/valve assembly to the end
of the manifold pipe using the 22mm
compression elbow.
Connect the mains water supply to the
15mm compression connection on the
isolating/check valve inlet. Fit the
flexible hose between the outlet of the
isolating/check valve outlet and the inlet
to the solenoid valve and leave in place.
!
NOTE
In hard water areas an anti-scale
device should be fitted on the cold
water supply to the wash system to
prevent scale build-up in the
manifold pipe and jets.
4.10 Fan Box and Flue Starter
Fit the fan box to the flanged flue outlet
on the back of the boiler so that the flue
starter outlet is at the top.
Remove the nuts and washers from the
four studs around the fan box inlet.
With the neoprene gasket in place on
the fan box, locate the four studs
through the corresponding holes in the
boiler flue outlet flange. Secure the fan
box using the nuts and washers
previously removed.
Ensure that the fan box is vertical and
the neoprene gasket is evenly
compressed to give an adequate seal
between the fan box and the boiler
flange.
Fit the solenoid head (fitted to the same
5-way plug as the lead from the flue fan
motor) on to the solenoid valve shaft
and secure with the steel clip provided.
Fit the 5-way plug from the flue fan
/solenoid valve into the socket at the
top right rear of the boiler. Ensure that
the plug is fully pushed home. See
Figure 4-1.
Boiler Installation
Information
!
SPIRA 9-36 Flow 1” ¼ BSP Female
Return 1” ¼ BSP Female
17
4 Boiler Installation Information
Auger Fixing
Flange
Figure 4-1: Flue fan/solenoid valve plug
connection
Figure 4-2: Pellet feed auger fixing
Figure 4-3: Auger plug connection
4.11 Pellet Hoppers
4.12 Pellet Feed Auger
4.11.1 Single Boiler Installation
Position the pellet hopper on the same
firm level surface as the boiler, on either
the left-hand or right-hand side of the
boiler (depending on hopper type used),
with the top access door facing
forwards. Refer to Figure 2-1 or 2-2 as
required, for clearance dimensions.
4.12.1 Single Boiler Hoppers
The pellet feed auger is supplied
packed with the hopper but not factoryfitted to it.
Fit the 6-way plug (No.3), from the
pellet feed auger motor, into the
corresponding 6-way socket on the left
side of the burner. Ensure that the plug
is fully pushed home until the small
catch it clicks into place. See Figure
4-3. Refer to Section 8.3 for all boiler
plug connections.
4.11.2 Double boiler installation
Position the pellet hopper on the same
firm level surface as, and in between,
the two boilers, with the top access
door facing forwards. Refer to Figure
2-3 for clearance dimensions.
Boiler Installation
Information
Failure to adhere to these
measurements can cause blockage of
the pellets in the pellet delivery hose or
can prevent access for servicing at a
later date. The hopper is supplied with
castors which allows the hopper be
moved during servicing. Once in the
correct position, engage the brakes on
the front casters to maintain this
position.
18
To fit, unpack the hopper and auger.
Remove the M5 screw fitted below the
auger opening on the front of the
hopper. Fit the end of the auger into
opening in the front of the hopper as far
as it will go and secure by fitting the M5
screw through the auger fixing flange
and tighten. See Figure 4-2.
4.12.2 Double Boiler Hoppers
Both augers on the ‘double boiler’
Intermediate hoppers are supplied
factory-fitted to the hopper.
To connect the hopper to the boiler, fit
one end of the pellet delivery hose onto
the pellet feed auger outlet and the
other end onto the burner feed tube.
The pellet delivery hose may need to be
cut if too long. A sachet of lubricant is
supplied in the accessories carton;
apply the lubricant to the joint to ensure
the pellet delivery hose is easily fitted.
Ensure the pellet delivery hose is not
kinked in any way.
!
WARNING
Ensure the pellet delivery hose forms
an air tight seal at each end and that
the pellet delivery hose is not
damaged. Leakage of air could
cause increased temperature in the
pellet delivery hose and result in
the pellet feed tube (burn back)
thermostat operating and shutting
down the burner.
4.13 Before you Commission
4.14 Completion
To avoid the danger of dirt and foreign
matter entering the boiler the complete
heating system should be thoroughly
flushed out – both before the boiler is
connected and then again after the
system has been heated and is still hot.
Please ensure that the Grant SPIRA
Commissioning form (supplied with the
boiler) is completed in full and that it is
signed by the householder/user.
This is especially important where the
boiler is to be installed on an old
system.
For optimum performance after
installation, the boiler and the
associated 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 Betz Dearborn's
Sentinel x300 or x400, or Fernox
Restorer. Full instructions are supplied
with the products butfor more details
visit either www.sentinel-solutions.net
for Betz Dearborn products or
www.fernox.com for Fernox products.
Leave the White copy with the user,
retain the Pink copy for your own
records, and return the Yellow copy to
Grant UK to register the installation of
the boiler.
Ensure that the User Information pack
(supplied with the boiler) is handed over
to the householder along with this
Installation and Servicing manual.
After flushing the system, an inhibitor
such as Sentinel X100 or Fernox MB-1
should be used in accordance with the
guidelines given in BS 7593:1992 for
long term protection against corrosion
and scale,
Boiler Installation
Information
Grant UK strongly recommend that a
magnetic in-line filter is fitted in the
heating system pipework. A
magnetic in-line filter must be fitted
in the heating system pipework. This
should be installed and serviced in
accordance with the filter manufacturer’s
instructions.
19
5 Condensate Disposal
5.1 General Requirements
When in condensing mode the Grant
SPIRA condensing wood pellet boilers
produce condensate from the water
vapour in the flue gases. This
condensate is slightly acidic with a ph
value of around 6. Provision must be
made for the safe and effective disposal
of this condensate.
Condensate can be disposed using one
of the following methods:
a) Into a soil stack – either directly or
via an existing waste system.
b) Into an external gulley.
c) Into a 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. Every Grant SPIRA boiler is
supplied with a trap and this MUST be
used. Refer to Section 5.6 for trap
details.
5.2 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.
Condensate disposal pipes must not
be connected directly into rainwater
downpipes or to waste/soil systems
connected to septic tanks.
Condensate must 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.
Condensate
Disposal
5.3 Pipework
20
Condensate disposal pipework must be
plastic. Copper or steel pipe is not
suitable and must NOT be used.
All condensate disposal pipes
connected to a Grant SPIRA boiler
must have a minimum ‘nominal’
diameter of 38mm (1 ½”) plastic pipe.
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.
Condensate disposal pipes must be
fitted with a fall (away from the boiler) of
at least 2.5° (~45mm fall per metre run).
!
NOTE
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.
When using a condensate pump with
a Grant SPIRA boiler, a condensate
holding tank of at least 40 litres is
required. This is to ensure that when
the boiler cleaning cycle has
operated the holding tank can collect
the total volume of the water used in
the wash down and the condensate
pump can then discharge the waste
water effectively.
A boiler interlock should be fitted to
shut off the boiler in the event of a
malfunction of the condensate pump.
!
WARNING
When using a condensate pump and
holding tank, the burner settings for
‘TIME CLEAN PERIOD’ (time boiler
cleaning is in operation) must not be
set greater than 600 (60 seconds)
and the ‘TIME CLEAN BOILER’ (time
between boiler cleaning operations)
must not be set less than 180
minutes, as modifying these times
could result in larger and more
frequent wash down of the boiler
which could exceed the capabilities
of the tank and condensate pump.
Refer to Section 8 for further details
of the burner settings.
5.4 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 38mm (1½”) waste pipe
used to minimise the risk of ice blocking
the pipe in freezing conditions.
The number of bends, fitting and joints
on external pipes should be kept to a
minimum to reduce the risk of trapping
condensate.
!
NOTE
For a boiler installed in an unheated
area such as an outhouse or garage,
all condensate pipework should be
considered as an ‘external’.
5.5 Condensate Soakaway
To keep external pipework to a
minimum, locate the soak away as
close as possible to the boiler but
ensure it is at least 1 metre from
building foundations and away from
other services, for example gas,
electricity or other services.
The condensate pipe may be run above
or below ground level and can enter
either the top or side of the soakaway
tube. Refer to Figure 5.1.
Ensure that the drainage holes in the
soakaway tube face away from the
building.
Backfill the soakaway tube, and the
hole around it, with 10mm limestone
chippings.
Only use a soakaway where the soil
is porous and drains easily.
32mm waste pipe
externasl to the building
Cement seal
400
2.5˚ fall
Ground level
25
100mm plastic tube
Sealed end
Backfill with 10mm
limestone chippings
Four rows of 3x12mm holes at
25mm centres and 50mm from
bottom of the tube. Holes
facing away from the property
Figure 5-1: ????
Figure 5-1: Purpose made condensate soakaway
Grant SPIRA condensing boilers are
supplied with condensate trap. This
trap must be used. No alternative trap
should be used in place of the trap
supplied with the boiler. The 1¼” BSP
female condensate outlet connection is
located at the rear of the boiler.
Fit the 1¼” 311 fitting (supplied) into
this connection. Using the elbow and
pipe (supplied), connect the trap to the
condensate outlet on the boiler, as
shown in Figure. 5-2.
A condensate discharge pipe with a
minimum diameter of 38mm (1½”) must
be fitted to the outlet connection at the
base of the trap.
In all cases the overflow pipe (see
Figure 5-2) must be fitted to the trap
and the end left open. This will protect
the boiler from becoming blocked with
condensate in the event of the
condensate discharge pipe blocking or
frozen.
!
CAUTION
All condensate pipework must be
adequately protected against
freezing, however if the condensate
pipe is frozen, water will build up
and discharge through the overflow
on the trap.
If connecting the condensate
discharge into a waste system or soil
stack, either internally or externally, a
second trap must be fitted in the
condensate discharge pipe. This trap
must provide the required 75mm water
seal. It must be located between the
boiler condense trap and the
connection to the soil stack, in a
position accessible for checking and
cleaning.
5.7 Inspection and Cleaning
of Trap
The boiler condensate trap (and any
second trap fitted) must be checked at
regular intervals (e.g. on every annual
service) and cleaned as necessary to
ensure it is clear and able to operate.
!
CAUTION
Failure to regularly check and clean
the condensate trap (or traps) may
result in damage to the boiler and
this will not be covered by the
product warranty.
Condensate
Disposal
5.6 Condensate Trap
21
6 Sealed Systems
6.1 Sealed System
Requirements
All Grant Spira boilers are suitable for
use with sealed systems complying with
the requirements of BS5449.
The system must be provided with the
following items:•
Diaphragm expansion vessel
complying with BS 4814.
•
Pressure gauge.
•
Pressure relief (safety) valve.
•
Approved method for filling the
system.
Expansion vessel
Figure 6-1: Sealed heating system components
!
NOTE
Ensure that the expansion vessel
used is of sufficient size for the
system volume.
Refer to BS 7074:1:1989 or The
domestic Heating design Guide for
sizing the required vessel.
The expansion vessel can be fitted in
either the return or flow pipework in any
of the recommended positions as
shown in Figure 6-1. 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. If the
expansion vessel is connected via a
flexible hose, care must be taken to
ensure that the hose is not twisted.
The pressure gauge must have an
operating range of 0 to 4 bar.
Sealed Systems
It must be located in an accessible
place next to the filling loop for the
system
22
Safety Valve
The safety valve (provided with the
boiler) is set to operate at 2.5bar. It
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.
Figure 6-2: Heating system Pressure Gauge
Filling Loop
Provision should be made to replace
water lost from the system. This can be
done manually (where allowed by the
local water undertaking) using an
approved filling loop arrangement
incorporating a double check valve
assembly.
The filling loop must be isolated and
disconnected after filling the system.
Heating System
The maximum temperature of the
central heating water is 75°C. Refer to
Section 1.1.
An automatic air vent should be fitted to
the highest point of the system.
If thermostatic radiator valves are fitted
to all radiators, a system by-pass must
be fitted. The by-pass must be an
automatic type.
All fittings used in the system must be
able to withstand pressures up to 3 bar.
Radiator valves must comply with the
requirements of BS 2767(10):1972.
One or more drain taps (to BS 2879)
must be used to allow the system to be
completely drained.
6.2 Filling the Sealed System
Filling of the system must be carried out
in a manner approved by the local
Water Undertaking.
!
WARNING
Only ever fill or add water to the
system when it is cold and the boiler
is off. Do not overfill.
The procedure for filling the sealed
system is as follows:
1. Check the air charge pressure in
the expansion vessel BEFORE filling
the system.
!
NOTE
The air charge pressure may be
checked using a tyre pressure gauge
on the expansion vessel Schraeder
valve. The vessel may be repressurised, when necessary, 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.
The expansion vessel charge pressure
should always be slightly greater than
the maximum static head of the
system, in bar, at the level of the vessel
(1 bar = 10.2 metres of water). See
Figure 6-2.
The charge pressure must not be
less than the actual static head at
the point of connection.
2. Check that the small cap (or screw)
on all automatic air vents (including
the one fitted at the left rear of the
boiler) is open at least one turn.
The cap (or screw) remains in this
position from now on.
3. Ensure that the flexible filling loop is
connected and that the double
check shut off valve connecting it to
the water supply 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.
7. Continue to fill the system until the
pressure gauge indicates between
0.5 and 1.0 bar. Close the fill point
valve. The system fill pressure (cold)
should be 0.2 - 0.3 bar greater than
the vessel charge pressure – giving
typical system fill pressures of
approx 0.5 bar for a bungalow
and 1.0 bar for a two storey house.
Refer to the Domestic Heating
Design Guide for further information
if required.
8. Repeat steps 5 and 6 as required
until system is full of water at the
correct pressure and vented.
9. Water may be released from the
system by manually operating the
safety valve until the system design
pressure is obtained.
10. Close the fill point and double
check valves either side of the filling
loop and disconnect the loop.
6.4 Pressure Relief (Safety)
Valve Operation
Check the operation of the pressure
relief (safety) valve as follows:
1. Turning the head of the valve
anticlockwise until it clicks. The click
is the safety valve head lifting off its
seat allowing water to escape from
the system.
2. Check that the water is escaping
from the system.
3. Top-up the system pressure, as
necessary.
!
NOTE
The expansion vessel air pressure,
system pressure and operation of
the pressure relief valve must be
checked on an annual service. Refer
to Section 11.
11. Check the system for water
soundness, rectifying where
necessary.
6.3 Venting the Pump
It is important that the pump is properly
vented to avoid an air lock and also
prevent it running dry and damaging the
bearings.
Unscrew and remove the plug from the
centre of the pump motor.
Using a suitable screwdriver, rotate the
pump spindle about one turn.
Replace the plug in the motor. Do not
overtighten.
3. Open the fill point valve.
5. When the needle of the pressure
gauge is between 0.5 and 1.0 bar,
close the valve.
6. Vent each radiator in turn, starting
with the lowest one in the system,
to remove air.
Sealed Systems
4. Gradually open the double check
valve from the water supply until
water is heard to flow.
23
7 Flue System and Air Supply
7.1 Air Supply
•
The flue outlet positions shown in
Figure 7-1 (taken from Approved
Document J – Section 2) can meet
the above requirement.
•
The heights and separation
distances shown in Figure 7-1 may
have to be increased in particular
cases, e.g. where high wind
exposure, surrounding tall buildings,
or adjacent trees can cause
adverse wind effects.
The Grant SPIRA wood pellet boiler
draws air for combustion from the room
in which it is located.
Any such room or space containing an
appliance must have sufficient
permanent air supply to the boiler
a. To ensure correct combustion of
the fuel and effective operation of
the flue system (i.e. to discharge of
combustion products to the open
air).
b. To supply enough free air to the
draught stabiliser.
The ventilation area provided must be in
accordance with the requirements of
The Building Regulations Approved
Document J – Section 2: Appliances
burning solid fuel.
A
•
The boiler flue cannot terminate into
an existing brick or clay lined
chimney. All masonry flues must be
lined using the Grant Black system
stainless steel flexible flue liner.
•
No other appliance can be
connected to the boiler flue.
•
The minimum clearance between
the outer flue surface and any
combustible material is 60mm.
•
Any condensate in the flue can run
back into the boiler. A condensate
drain at the base of the flue system
is not required.
D
B
C
For a boiler with a draught stabiliser, a
permanent air vent with a total free area
of at least 850mm2 per kW of appliance
rated output is required. To achieve this,
the following minimum vent opening
areas are required:
Boiler Model
Minimum Vent
Open Area
Grant SPIRA 6-26
221cm² (35in²)
Grant SPIRA 9-36
306cm² (48in²)
Grant SPIRA 12-52 442cm² (70in²)
Grant SPIRA 15-62 527cm² (83in²)
Point where flue passes through
weather surface (Note 1,2)
Clearance to flue outlet
A
At or within 600mm of the ridge
At least 600mm above the ridge
B
Elsewhere on a roof (whether
pitched or flat)
At least 2300mm horizontally from the
nearest point on the weather surface and;
a; at least 1000mm above the highest
point of intersection of the chimney
and the weather surface; or
b; at least as high as the ridge
C
Below (on a pitched roof) or
within 2300mm horizontally to
an openable rooflight, dormer
window or other opening (Note 3)
At least 1000mm above the top of the
opening
D
Within 2300mm of an adjoining
building, whether or not beyond
the boundary (Note 3)
At least 600mm above the adjacent
building
Grant SPIRA 18-72 612cm² (96in²)
If a bulk pellet store is fitted internally,
refer to the manufacturer’s instructions
for any ventilation requirements.
Flue System and
Air Supply
7.2 Flue Position and
Clearances
24
The Grant Spira wood pellet boilers
have high operating efficiencies and low
flue gas temperatures. Only the Grant
‘BLACK’ insulated twin-wall flue
system must used with the Grant
SPIRA boilers.
•
The flue terminal should be located
in a downdraught free area, i.e.
above the roof, where it can
discharge freely and not present a
fire hazard whatever the wind
conditions.
Notes
1) The weather surface is the building external surface, such as its roof, tiles
or external walls.
2) A flat roof has a pitch less than 10°.
3) The clearance given for A or B, as appropriate, will also apply.
Figure 7-1: Flue terminal positions
The above clearances are as specified in Building Regulations Approved
Document J. Also refer to Approved Document J of either the England and
Wales or Irish building regulations for further requirements on the installation of
flue systems for solid fuel appliances.
7.3.1 Fan Box & Flue Starter
The fan box supplied with the boiler
(packed in the accessories carton)
incorporates:
•
Flue exhaust fan
•
Draught stabiliser
•
Flue starter connection (to fit Grant
‘Black’ flue system)
•
Clean out hatch
The fan box is supplied with a neoprene
gasket for connection to the boiler. This
neoprene gasket is to accommodate
the low temperature wet flue system of
the Grant SPIRA boilers. Refer to
Section 4.15 for fitting details.
The lead for the flue fan (supplied
factory-fitted to the fan box) is
connected to the same 5-way plug as
the lead for the wash system solenoid
valve. Refer to Section 4.15 for
connection details.
When fitting the flue system to the flue
starter connection, on the fan box, the
lip seal supplied with the flue
component must be fitted to the inner
flue liner, and the locking band fitted to
secure the joint.
When installed, the draught stabiliser
must not be boxed in or obstructed
from operation in any way.
The clean out hatch allows access to
the inside of the fan box for inspection
and, where necessary, removal of any
ash that may have dropped down
inside the flue system. The clean-out
hatch MUST be correctly fitted during
normal boiler operation. See Section 10
-Servicing.
A condensate drain at the base of the
flue is not required as the flue system is
designed to allow the condensate to
run back into the boiler.
7.3.2 Flue System
The Grant ‘Black’ flue system is a fully
insulated stainless steel twin-wall flue finished with a Black Polyester Powder
paint finish. This insulated flue system
reduces the possibility of the
condensate freezing in the flue, and
also has a high corrosion resistance
suitable for solid fuel.
The 125mm (5in) ‘Black’ twin-wall flue
system is suitable for BOTH the SPIRA
6-26 & 9-36 models.
Masonry chimneys MUST be lined
using the 125mm stainless steel flexible
‘smoothbore’ liner – available as part of
the ‘Black’ system - due to the
condensate produced from the boiler.
!
NOTE
The Grant BLACK flue system is the
ONLY flue system suitable for use
with the Grant SPIRA Wood pellet
boilers. The use of other flue
systems will invalidate the product
warranty on the boiler.
6.3.3 Joining Components
All the ‘Black’ system twin-wall flue
components (with the exception of the
elbows) use a ‘twist lock’ jointing
system.
Male
collar
Insulation
Stainless
steel outer
case
Stainless
steel
inner liner
Female
collar
Capillary
break
Figure 7-2: Male and female flue connections
The ‘male collar’ end of the flue
component MUST always be
uppermost when fitted.
To join two components together:
First fit the lip seal supplied into the
groove (in the inner flue liner) at the
‘female collar’ end of the flue
component to be fitted.
All flue joints must have a lip seal
gasket fitted. The lip seal should be
fitted dry and the lubricating grease
(supplied with the component) applied
to the internal surface of the socket into
which it is to be fitted.
Loosen the locking band at the ‘female
collar’ end. Insert the ‘male collar’ into
the ‘female collar’ and twist through 1/6
of a turn to lock in place. Refer to
Figure 7-3.
Flue System and
Air Supply
7.3 Flue System Assembly
25
7 Flue System and Air Supply
To temporarily assemble the flue system
components, to check component
lengths, alignment of connections, etc.
DO NOT fit the lip seals. However, for
FINAL assembly the lip seals provided
MUST be fitted at EVERY joint.
!
WARNING
All joints in the flue system must be
accessible for inspection. No joints
should be located within a wall, floor
or ceiling spaces or any other
inaccessible place.
7.3.4 Adjustable Length
The Grant ‘Black’ flue system includes
an Adjustable flue extension. Refer to
Section 7.6. This allows any of the
straight flue extension components to
be extended in length by between
75mm to 250mm.
Figure 7-3: Twist lock joint between
components
Ensure that the two beaded ends of the
flue components are in contact with
each other all round. Position the
locking band so that it grips the beaded
edge of both components and fasten
using the spring clip. The locking bands
provided MUST be fitted at ALL flue
joints. Refer to Figure 7-4.
This adjustable extension must be used
in conjunction with any straight
extension (1000mm, 500mm or
333mm) to achieve the actual straight
length required.
To fit the adjustable extension, first
remove insulation from between the
inner and outer walls of the component,
as necessary. Fit the open end over the
‘male collar’ end of the fixed extension
and adjust to achieve the required
overall length. Secure the two
components together using the wide
locking band supplied.
!
Flue System and
Air Supply
Locking band
26
Figure 7-4: Fitting of locking band
To allow for alignment, the female
collars of the elbows do NOT have the
twist lock flutes, but the locking band
MUST still be used to secure the two
flue components together.
NOTE
The adjustable section is not loadbearing, therefore adequate support
of the flue system MUST be provided
immediately above the adjustable
extension.
7.3.5 Support Components
The weight of the flue system is
considerable. It must NOT be carried by
the fan box fitted to the appliance, but
requires independent support.
Support Plate
On internal systems, the weight can
often be supported where the flue
passes through an upstairs floor, using
the Support Plate with clamp band
(Grant ref. WP/SP). A four-sided square
opening, formed by timber stringers
between the joists, is required to
support the plate. Ensure that the
minimum distance of 60mm is achieved
between the flue outer surface and the
any combustibles (e.g. timber joists).
A Fire Stop plate (Grant ref. WP/FP) is
also required to be fixed to the ceiling
below.
When passing through a second
upstairs floor (in a 3-storey house)
either a second support plate can be
fitted or only two fire-stop plates (one
above and one below) need be fitted as
the flue is adequately supported at the
first upstairs floor level.
Intermediate Top Plate
Flue systems running up against either
an Internal or external wall surface can
be supported using the Intermediate
Top Plate (Grant Ref. WP/TP). This is
mounted on a pair of Wall Support Side
Plates (Grant Ref. WP/WS), which are
fastened to the wall, to provide support
at either the base, or part way up, a
vertical section of flue.
The ‘female collar’ (on the underside of
the plate) is fitted into the flue below
and the ‘male collar’ (on the upper side
of the plate) is a twist-lock connection
into the flue above. Both joints are
secured using the clamp bands
provided.
Wall and Roof Brackets
Both the Wall bracket (Grant ref.
WP/WB50) and the Adjustable Wall
Bracket (Grant ref. WP/WB300) are
NOT load bearing and are designed to
give lateral support only. Wall brackets
should be fitted with a maximum
spacing of 3m on straight runs of flue
and at any offset to ensure the system
is rigidly supported.
Similarly, the Roof Support Band (Grant
ref. WP/RS) is not load bearing and is
designed to give lateral support only.
Where the flue is free standing above
the roof and its height exceeds 1.5m
beyond the last support of the roof (e.g.
Roof Support Band) a Guy Wire
Bracket (Grant ref. WP/GB) MUST be
used and at every 1.5m thereafter.
Grant do not supply the guy wires or tie
rods to use with this bracket.
7.3.6 Elbows
Two elbows are available - 30° and 45°.
To allow for alignment, the female
collars of these elbows do NOT have
the twist lock flutes, but the locking
band MUST still be used to secure the
two flue components together.
The Building Regulations Approved
Document J requires a flue system to
have the means to be inspected and
cleaned as required.
To allow for this there should be no
more than 2 elbows – of maximum
angle 45° from the vertical – fitted
between the boiler fan box (clean out
hatch) and the terminal.
This can be increased to a maximum of
four elbows (maximum 45°) between
the boiler and terminal if there is an
inspection hatch between the second
and third elbows. An Inspection Pipe
incorporating an inspection hatch
(Grant ref. WP/IP) is available as part of
the Grant ‘Black’ flue system.
Any Inspection hatch must be
accessible for checking and cleaning
purposes.
!
WARNING
Failure to maintain a clean flue can
result in the emission of flue gases
into the dwelling or damage from fire
in the flue. See Section 11.4 Cleaning
the Boiler & Flue.
!
WARNING
No horizontal section or no bend
greater than 45° should be used as
these can cause a build up of ash
and condensate in the flue.
7.3.7 Wall Sleeves
In accordance with the Building
Regulations Approved Document J, a
wall sleeve should be used where the
flue system passes through a wall. A
suitable wall sleeve is available as part
of the Grant ‘Black’ flue system. This
45° angled wall sleeve gives a 60mm
clearance all round from the outer
surface of the flue passing through it.
The sleeve is 45° mitred at one end.
The other end of the sleeve should be
cut on site to the correct length, to
leave it flush with the wall on both
sides.The gap between the sleeve and
flue should be adequately
weatherproofed using a good quality
mastic and fibre rope.
7.4 Flue Notice Plate
The Building Regulations Approved
Document J requires a notice plate that
conveys essential information regarding
the flue installed to be permanently
displayed. A suitable self adhesive
notice plate is supplied with the Grant
Black flue system and this must be
completed by the installer and
displayed in an unobtrusive but obvious
position within the building concerned,
e.g. next to the flue system/boiler.
7.5 Carbon Monoxide Alarm
The Building Regulations Approved
Document J requires a Carbon
Monoxide alarm to be fitted in the room
where the boiler is located.
This should be positioned between 1
and 3m horizontally from the boiler
either:
a) on the ceiling at least 300mm from
any wall, or
b) on a wall as high up as possible
(above any windows or doors) at
least 150mm from ceiling.
Flue System and
Air Supply
Extended Locking Band
A height of up to 3m above the last
support at the roof can be achieved,
without the need for guy wires, by using
an extended locking band (Grant ref.
WP/LBEXT) at the joint immediately
below, and at every joint above, the last
flue support.
27
7 Flue System and Air Supply
7.6 Flue System Components
500
500
WP01 Locking band
WPUF 200 Uni flash
WPADJ 250 EXT 250
WPFP Firestop plate 2PC
50
WPSC Storm collar
WPGB Guy wire bracket
WPWB50 50mm Wall bracket
WPEXT333 Extension 333mm
WPEXT500 Extension 500mm
WPEXT1000 Extension 1000mm
Adj. 5
0-300
mm
WPWB300 300mm Wall bracket
WPSP Support plate 2pc
80
WPRS Roof support band
Flue System and
Air Supply
WP45 45˚ Bend
28
WPRC Rain Cap
WP30 30˚ Bend
WPTP Intermediate top plate
29
Flue System and
Air Supply
7 Flue System and Air Supply
7.7 Flue Component Dimensions
revised drawings to come
Flue System and
Air Supply
Straight Pipe Length (mm)
30
Nominal
Length
Effective
Length
(mm)
Part
Number
1000
960
WP/EXT1000
500
460
WP/EXT500
333
293
WP/EXT333
200
160
WP/EXT200
Adjustable Pipe 75 - 250mm
Part no. WP/ADJ250
Complete with locking band.
Telescopes over pipe below.
Minimum engagement should
be half the diameter.
This component is NOT load-bearing.
Double 30˚ Bend and Straight Pipe
Length (mm)
Double 45˚ Bend and Straight Pipe
Length (mm)
Effective
Length
Effective
Length
Dimension
Length
Dimension
Length
960
A
B
1061
542
960
A
B
933
784
460
A
B
628
292
460
A
B
580
431
293
A
B
483
208
293
A
B
462
313
160
A
B
368
142
Figure 7-5: Typical flue installations details
Flue System and
Air Supply
7.8 Typical Flue Systems
31
8 Electrical
8.1 General Requirements
The Grant SPIRA Condensing Wood
Pellet boiler requires a 230 V ~50 Hz
electrical supply. The unit should be
connected to a mains power supply
that is protected by a 30mA RCD.
For the UK, the electrical installation
must be carried out by a competent
installer in accordance with the
requirements of the Electricity at work
Regulations 1989 and BS7671:2008 –
IEE Wiring Regulations 17th Edition
(including all amendments)
If installed in the Republic of Ireland, the
wiring installation must comply with all
ETCI rules.
All the wiring and supplementary earth
bonding external to the boiler must be
in accordance with the current I.E.E.
wiring regulations.
Any heating system controls, e.g. room
thermostat , frost thermostat, etc.
connected to this boiler must be
suitable for use on mains voltage.
8.2 Hopper Electrical
Connections
7.2.1 Single Boiler Hopper
(with a single auger) – in either a left
hand or right hand version as required,
to supply a single boiler.
•
Two 5-way plugs – one to connect
to each of the two boilers.
•
6-way plug – to connect either a
bulk pellet store auger or Grant
SPIRA-VAC vacuum system to the
hopper and boiler.
Refer to Figure 8-8 for double hopper
wiring diagram.
8.2.3 For Installations with a Bulk
Pellet Store only
Both single boiler and double boiler
hoppers are supplied with the 6-way
plug parked inside the wiring enclosure.
See Figure 8-1.
If a bulk pellet store is to be used:
•
Remove the wiring centre cover
from the rear of the hopper.
•
Unclip the 6-way plug from
diaphragm switch bracket.
•
Pass the 6-way plug lead through
the grommet just below the wiring
centre cover.
•
Set the toggle switch on the
diaphragm switch bracket to ‘BULK
STORE’. See Figure 8-1.
•
Replace the wiring centre cover and
fasten in place using the screws
previously removed.
•
Connect the 6-way plug to the
corresponding 6-way connector on
the pre-wired flying lead fitted to
either the bulk pellet auger or Grant
SPIRA-VAC system.
•
If using the Grant SPIRA-VAC
system, refer to the installation
instructions supplied with the
system for further details on its
installation and operation.
This hopper is fitted with three prewired flying leads with factory-fitted
plugs:
•
4-way plug – for connection of the
permanent live, earth and neutral
and also the switched live from the
heating controls system.
•
5-way plug – to connect the hopper
to the boiler.
•
6-way plug – to connect either a
bulk pellet store auger or Grant
SPIRA-VAC vacuum system to the
hopper and boiler.
Electrical
Refer to Figure 8-7 for hopper wiring
diagram.
8.2.2 Double Boiler Hopper
(with two augers) – to supply two
boilers in a ‘double boiler’ installation.
This hopper is fitted with four pre-wired
flying leads with factory-fitted plugs:
•
32
4-way plug – for connection of the
permanent live, earth and neutral
and also the switched live from the
heating controls system.
8.2.4 For Installations using the
Pellet Hopper only
When used without a bulk pellet store,
the pellet hopper has the facility for the
connection of a 230V ‘low pellet’
indicator lamp (not supplied). This will
indicate to the householder that the
pellets in the hopper have reached the
minimum level and the hopper needs to
be topped up.
The indicator lamp should be
positioned so it can be easily viewed by
the householder. See either Figure 8-7
or 8-8, as applicable, for the connection
details.
If a bulk store is used, with either the
Grant SPIRA-VAC system or a Grant
bulk auger, a ‘low pellet’ indicator lamp
cannot be fitted to the pellet hopper.
8.3 Boiler Plug Connections
Before making any electrical
connections to the hopper (by
connecting the 4-way plug and socket
together) ensure that all the plug
connections have been correctly made
between the hopper, boiler and (if fitted)
the bulk pellet supply system, as
follows:
1. Fit the 5-way plug from the flue fan
and solenoid valve into the socket
at the top right rear of the boiler.
See Figure 8-2. Ensure it is fully
pushed home.
Figure 8-2: Flue fan/solenoid valve
plug connection
Figure 8-1: Hopper selector switch
2. Fit the 5-way plug from the hopper
into the socket at the top left rear of
the boiler. See Figure 8-3. Ensure it
is fully pushed home.
Refer to instructions supplied with
either the Grant SPIRA-VAC or
Grant bulk store auger for further
details.
8.5 Connecting the Power
Supply
!
WARNING
Before making any connections to
the heating systems controls ensure
that the electrical supply is isolated
at the fused spur serving the
controls and boiler, that the fuse has
been removed and the isolator is
locked off.
Figure 8-3: Hopper plug connection
8.4 Heating System Controls
3. On a double boiler installation, fit
the second 5-way plug from the
double hopper into the top right
rear of the second boiler. Ensure it
is fully pushed home.
The boiler can be used in conjunction
with typical heating control system, e.g.
‘S-Plan’ or ‘Y-Plan’ type controls. Refer
to Figures 8-9 and 8-10 and for typical
control system wiring diagrams.
4. Fit the two 7-way plugs (No.1 and
No.2) from the boiler control panel
into the two lower connections on
the left side of the burner. These
plugs are male and female and
cannot be fitted into the wrong
connections. Refer to Figure 8-3.
Ensure that both plugs are fully
pushed home until the small catch
on each of them clicks into place.
As the electrical connection (permanent
mains supply and switched live from the
heating control system) to the boiler is
made via the flying lead with 4-way plug
connection it will be necessary to
provide a 4-core flying lead either
The boiler requires a permanent mains
supply and a switched live supply to
control the boiler. For details of Controls
refer to Section 8.4 and Figures 8-9 or
8-10.
a) Directly from the heating controls
wiring centre – if suitable located
adjacent to the boiler/hopper, or
Do NOT interrupt the permanent supply
to the hopper/boiler with any external
controls.
b) Via a junction box situated adjacent
to the boiler hopper.
The power supply cable and flex should
be at least 0.75mm2 PVC as specified
in BS 6500 - Table 16.
5. Fit the 6-way plug (No.3) from the
pellet feed auger motor into the
upper connection on the left side of
the burner. Refer to Figure 8-4.
Ensure that the plug is fully pushed
home until the small catch it clicks
into place.
The length of 4-core flex required
(between the wiring centre or junction
box and the 4-way plug connection)
must be sufficient to allow the hopper
to be moved out enough to allow
disconnection the 4-way plug.
Frost Protection
For additional protection of either the
entire heating system, or the boiler and
localised pipework, it is recommended
that a frost thermostat be installed. It is
also recommended that it be used in
conjunction with a pipe thermostat to
avoid unnecessary and wasteful
overheating of the property.
Figure 8-4: Auger plug connection
The pipe thermostat should be located
on the boiler return pipe, and set to
operate at 25°C. Refer to Figures 8-9 or
8-10 as appropriate for connection
details.
Do NOT connect the electrical
supply to the hopper, by connecting
the 4-way plug and socket together,
untill ALL plug connections have
been correctly made between the
hopper, boiler and (if fitted) the bulk
pellet supply system.
Connect the mains supply using the
following procedure:
1. Press down on the small catch
(between the two parts of the
factory-fitted 4-way plug/socket
connector) to release it.
2. Separate the two parts and remove
the cover from the male 4-way plug.
3. Connect the flex to the 4-way male
plug as follows:
•
Terminal L2 – Switched live (from
heating system controls)
•
Terminal N – Mains neutral
•
Terminal (earth) – Mains earth
•
Terminal L1 – Mains (permanent)
live
4. Replace the cover, ensuring outer
sheath of the flex is held in the
cable grip of the plug, and secure
using the screws previously
removed.
Electrical
6. If a bulk pellet store is to be used,
connect the 6-way plug to the
corresponding connection on the
flying lead from either the Grant
SPIRA-VAC system or Grant bulk
pellet store auger. Ensure that the
plug and socket are fully pushed
together until the small catch clicks
into place.
33
8 Electrical
5. Connect the other end of the 4core flex to the either the heating
system controls wiring centre or
junction box. Refer to either Figures
8-9 or 8-10, as appropriate, for
details of the connections required.
6. Fit the two parts of the 4-way
connector back together. Ensure
the plug and socket are fully
pushed together until the small
catch clicks into place.
Electrical
8.6 Wiring Diagrams
34
Figure 8-5: Boiler internal wiring diagram
!
WARNING
The Grant wood pellet boiler and
intermediate hopper contains
electrical switching equipment and
must be earthed; also any bulk
hopper system fitted should also be
earthed.
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
•
Resistance to earth
Electrical
Figure 8-6: Burner wiring diagram
35
8 Electrical
Electrical
Figure 8-7: Hopper wiring diagram – single boiler hopper
36
Electrical
Figure 8-8: Hopper wiring diagram – double hopper
37
8 Electrical
*See Figure 8-11 for wiring Pressure Switch
Kit for use with plastic pipe in installation
Electrical
Figure 8-9: Heating system controls – S-plan type system connection diagram
38
*See Figure 8-11 for wiring Pressure Switch
Kit for use with plastic pipe in installation
Electrical
Figure 8-10: Heating system controls –
Y-plan type system connection diagram
Figure 8-11: Connection of Grant low water
pressure switch (ref. MPCBS62)
39
9 Burner
9.1 Burner Operation
9.2 Burner Operational Modes
The burner controls the pellet feed
auger, flue fan, boiler temperature and
also the boiler and brazier cleaning
systems. The burner comes with a
display screen and six control buttons.
These buttons are to access the menus
and control the burner functions.
‘BOILER WAIT THERMOSTAT’:
(operation code 03) Boiler is in standby
awaiting the following;
‘PELLET BURNER FIRING’: Power
100% (operation code 13) Flame is fully
developed and boiler is operating on full
power.
•
A switched live input signal from a
control system.
•
Activated after –‘WAIT LIGHTING’
lighting feed reduced mode
•
The boiler temperature to drop
below the ‘DELTA RESTART’
temperature. (‘DELTA RESTART’ is
the temperature the burner restarts
after maximum temperature has
been reached).
•
Deactivated after temperature is
within ‘TEMP DELTA’ range.
The burner is equipped with a brazier
where the combustion of the wood
pellets takes place within the boiler.
The self cleaning device on the brazier
is automatically activated after the pellet
feed auger run time has exceeded a
predetermined set time. The pellet feed
auger run time for brazier and boiler
cleaning is pre-set in the burner menu.
The temperature of the water within the
boiler is controlled via a thermistor to
the burner. The thermistor is inserted
into the boiler water jacket and is used
by the burner to control the modulation
of the boiler output.
The boiler has a set point temperature.
This is the target flow temperature from
the boiler. As the temperature of the
boiler increases and reaches the set
point less 5°C the output of the boiler is
reduced by one step. Each subsequent
1°C increase in boiler temperature
reduces the output of the boiler by one
modulation step until the temperature
reaches the set point plus 5°C. At this
point the boiler output is ‘MINIMUM
FLAME’ which is minimum output
setting of the boiler. The percentage
increase or decrease in power is
calculated on the rate of temperature
change. The sequence of operation is
described in Section 9.3.
•
The ON/STANDBY switch on
the control panel is set to the ‘ON’
position.
‘WAIT PRELOAD BRAZIER’:
(operation code 40) Initial loading of
pellets into the brazier to enable
combustion to start.
•
•
Activated with a switched live input
signal and/or temperature drops
below the ‘DELTA RESTART’
temperature.
Deactivated after time exceeds
‘T08’.
‘WAIT LIGHTING’ – IGNITION:
(operation code 41) Period of time given
for pellets to light.
•
•
Activated after ‘PRE LOAD’
operation is complete.
Burner
‘PELLET BURNER FIRING’: Power
(minimum) (operation code 13) Flame is
reduced and boiler is at its minimum
output.
•
Activated once the boiler
temperature exceeds the ‘TEMP
DELTA’ range.
•
Deactivated after the temperature
exceeds ‘TEMP OFF H2o.
‘TURNING OFF BRAZIER’: (Operation
code 14). Burn down period to remove
any pellets remaining in the brazier.
•
Activated once switched live input
signal is switched off or the boiler
temperature exceeds ‘TEMP OFF
H2o’ setting.
•
Deactivated once photocell lux
reading has dropped below the
‘FLAME ON’ setting less.
Deactivated once photocell lux
reading exceeds ‘FLAME ON’
setting.
‘WAIT LIGHTING’–FLAME
STABILISATION: (operation code 45)
Period of time to allow flame stabilise
after pellets have ignited.
•
Activated after ignition mode.
•
Deactivated after time exceeds
‘T13’.
‘WAIT LIGHTING’ –LIGHTING FEED
REDUCED: (operation code 42) Period
of time intermittent quantities of pellets
supplied to the brazier to increase the
flame.
40
‘PELLET BURNER FIRING’: Power
(modulating) (operation code 13) Flame
is reduced and boiler output is
modulating.
• Activated once the boiler
temperature is within the ‘TEMP
DELTA’ range.
• Deactivated after temperature
exceeds the ‘TEMP DELTA’ range.
•
Activated after -‘WAIT LIGHTING’
flame stabilization mode.
•
Deactivated after time exceeds
‘T09’.
‘WAIT POST PURGE’: (operation code
26) Period of time after burn down is
complete to ensure no unburnt pellets
ignite.
•
•
Activated after ‘TUNNING OFF
BRAZIER’ is complete.
Deactivated after time exceeds
‘T22’.
9.3 Burner Operational Sequence
Flow Chart of Operation of Wood Pellet Boiler
03
Burner Power
Activated
40
Wait Boiler Thermostat
Temp > 'Delta Restart' Temp or
Switched Live Input Off
Wait Pre Load Brazier
(Pressure Switch Check)
Temp < 'Delta Restart' Temp
& Switched Live Input On
Pressure Switch Check OK
40
Wait Pre Load Brazier
T > 'T08' Pre Load Time
Switched Live
Input Off
41
Wait Lighting
(Ignition)
Lux = 'Flame on'
Switched Live
Input Off
45
Wait Lighting
(Flame Stabilisation)
T > 'T13' Flame Stabilisation
Switched Live
Input Off
42
Wait Lighting
(Lighting Feed Reduced)
T > 'T09' Lighting Feed Reduced
Switched Live
Input Off
13
Pellet Burner Firing
(Max Flame)
Temp within 'Temp
Delta' Range
Switched Live
Input Off
13
Temp < 'Temp
Delta' Range
Temp > 'Temp
Delta' Range
Switched Live
Input Off
13
Pellet
Temp in 'Temp
Delta' Range
Flash Cleaning = 1
Pellet Burner Firing
(Modulating )
Auger run time >
'Time Clean Braz' &/or
'Time Clean Boiler'
Burner Firing
(Min Flame )
Temp > 'Temp Off H2o'
14
14
Turning Off Brazier
Turning Off Brazier
Flash Cleaning = 0
Auger Run Time > 'Time Clean Boiler'
15
Auger Run Time > 'Time Clean Braz'
Wait Brazier is Opening >>> Auger Run Time >
'Time Clean Braz'
Auger Run Time >
'Time Clean Boiler'
15
03
Watt Cleaning Boiler
Lux < 'Flame On'
26
Wait Post Purge
For ‘STEP AUTO’ function (the two digit code allocated to each function). Refer to Section 9.7.3.
Burner
Wait Brazier is Closing >>>
41
9 Burner
9.4 Burner Display Screen
Active symbols
=
=
=
=
=
=
=
=
Boiler thermostat calling
Burner fan operational
Pressure switch closed
Ignition element operational
Feed auger operational
Photocell lux reading >'Flame On' setting
n/a
Error
9.5 Burner Control Buttons
The burner has six control buttons,
these perform the following tasks.
Button No.1
Normal Mode; Increase temperature set point by 1˚C
Menu mode; Scroll up
Button No.2
Normal mode; Decrease temperature set point by 1˚C
Menu mode; Scroll down
Button No.3
Menu mode; Scroll forward
Button No.4
Normal mode; Reset fault
Menu mode; Scroll back
Burner
Button No.5
Menu mode; Decrease parameter value
42
Button No.6
Menu mode; Increase parameter value
9.6 Burner Menu Navigation Chart and Factory Default Settings
X
3
0
Burner
3
43
9 Burner
9.7.1 ‘INSTAL’ menu folder
‘INSTAL’ represents the Installer folder.
It enables the installer access relevant
parameters for adjustment during the
installation / commissioning of the
appliance. Only accessible with an
access code.
9.7 Burner Menu
Using the main menu flow chart shown
in Section 9.6 navigate the menus using
the buttons as described in Section 9.5.
Each of the four main folders is
described in further detail as follows;
‘INSTAL’, Installer folder, see Section
9.7.1
The ‘INSTAL’ folder has four sub folders;
•
menu 1-4, H2o
‘MANUFACT’ not applicable.
•
menu 2-4, POWER PELLET
‘VIEW’ folder, see Section 9.7.3.
•
menu 3-4, CLEAN
‘USER’ folder, see Section 9.7.4.
•
menu 4-4, SETUP FAN
Press button ‘3’ to open the menu
settings. Once the menu settings option
is activated there are four folders to
choose from as shown below.
To access the parameters within the
‘INSTAL’ folder from the main burner
display, navigate as follows;
0
0
9.7.1.1 ‘menu 1-4- H2o’ sub folder
contains three parameters stored within
this folder;
Burner
a) TEMP DELTA: Defines the boiler
temperature either side of the Setpoint in which the boiler will modulate.
Units -°Celsius.
Default setting 6-26 & 9-36 =
5 (5°C).
44
b) TEMP OFF H2o: Temperature the
burner’ shuts down.
Units -°Celsius.
Default setting 6-26 & 9-36 =
80 (80°C).
c) DELTA RESTART: Temperature
drop below the set-point before
burner re-starts.
Units -°Celsius.
Default setting 6-26 & 9-36 =
5 (5°C).
CAUTION
Settings in the burner menu’s below
are based on the boiler using the
Grant fixed angle pellet feed auger at
45° and an auger motor fixed speed
of 8.1 rpm. Only ENplus A1
(EN14961-2) pellets MUST be used
with the Grant SPIRA boilers. These
pellets must be bark and sand free
AND approved by Grant UK.
BEFORE being used in the Spira
boilers. Failure to use approved
pellets will invalidate the product
warranty.
!
NOTE
Adjusting this setting will also result
in the input during the modulation
period being adjusted as the
modulation input is automatically
calculated on the max/min &
load/pause settings.
9.7.1.2 ‘menu 2-4- POWER PELLET’
The parameters stored within this folder
are;
9.7.1.3 ‘menu 3-4- CLEAN’
The parameters stored within this folder
are;
a) TIME LOAD MAX: Time the pellet
feed auger operates to deliver
pellets to the brazier when the
burner is in max flame mode.
a) TIME CLEAN BRAZ: Total pellet
feed auger run time before burner
brazier cleaning operation activates.
(If the burner shuts down
immediately or waits for the next
shut down is determined by
‘FLASH CLEANING’ see 8.3.1.3 d.)
Default setting 6-26 & 9-36 =180
(180 minutes).
Adjusting this time adjusts the boiler
input in max flame, i.e. the larger
the load time, the greater the input,
alternatively the smaller the load
time the lower the input (see table
Section 2.2.1).
Units 000.0 seconds.
Default setting 6-26 = 25
(2.5 seconds).
Default setting 9-36 = 65
(6.5 seconds).
b) TIME PAUSE MAX: Time between
pellet feed auger operations when
the burner is in max flame mode.
Adjusting this time adjusts the boiler
input in max flame, i.e. the larger
the pause time, the lower the input,
alternatively the smaller the pause
time the higher the input (see table
Section 2.2.1).
Units 000.0 seconds.
Default setting 6-26 & 9-36 = 0025
(2.5 seconds).
c) TIME PAUSE MIN: Time between
pellet feed auger operations in min
flame. Adjusting this time adjusts
the boiler input in min flame, i.e. the
larger the pause time, the lower the
input, alternatively the smaller the
b) TIME CLEAN BOILER: Total pellet
feed auger run time before boiler
cleaning operation activates.
Default setting 6-26 & 9-36 =180
(180 minutes).
c) TIME CLEAN PERIOD: Time
period boiler cleaning function is
operational once ‘TIME CLEAN
BOILER’ has elapsed.
Default setting 6-26 & 9-36 =60
(60 seconds).
d) FLASH CLEANING:
Commencement of brazier cleaning.
1 = Interrupt burner firing, shut
down and clean brazier when time
is greater than ‘TIME CLEAN
BRAZ’.
0 = at next burner shut-down, clean
brazier when time is greater than
‘TIME CLEAN BRAZ’.
Default setting 6-26 & 9-36 = 1.
e) HOURS SERVIC: Time lapse
period before the burner screen
displays ‘SERVICE’. This is to
indicate a service is now due.
Default setting 6-26 & 9-36 =
500 (500 hrs).
RESET SERVICE: to cancel the
‘SERVICE’ display on the burner
screen after the boiler has been
serviced. Press button 3 (‘SET’)
followed by button 4 (‘RESET’) five
times to exit the menu.
IT IS ESSENTIAL TO RESET THE
SERVICE DISPLAY AND AFTER
EACH SERVICE.
9.7.1.4 ‘Menu 4-4- SETUP FAN’
a) POWER MAXIMUM: Burner fan
speed setting when burner in ‘max’
output mode.
Default setting 6-26 = 36.
Default setting 9-36 = 43.
b) POWER MINIMUM; Burner fan
speed setting when burner in ‘min’
output mode.
Default setting 6-26 = 21.
Default setting 9-36 = 26.
c) POWER LIGHTING: Burner fan
speed setting when burner in
lighting mode.
Default setting 6-26 & 9-36 = 20.
d) POWER TEST: Used to simulate
the burner fan speed for test
purposes only. Once the ‘POWER
TEST’ is cancelled from the screen
the burner fan reverts to its required
operational speed.
e) LOAD DEFAULT: Load factory
default settings. Press button 3 to
activate factory default settings.
9.7.2 ‘MANUFACT’ Menu Folder
‘MANUFACT’ displays the
manufacturer folder; it enables the
manufacturer set parameters required
for an individual boiler. This folder
should not be accessed or modified in
anyway.
Burner
!
pause time the higher the input
(see table Section 2.2.1).
Units 000.0 seconds.
Default setting 6-26 = 140
(14.0 seconds).
Default setting 9-36 = 250
(25 seconds).
45
9 Burner
9.7.3 VIEW Menu Folder
9.7.4 USER Menu Folder
‘VIEW’ folder displays the function or
status of the boiler.
‘USER’ folder; allows the user change
the language on the burner display.
To access the menu displays within the
‘VIEW’ folder from the main burner
display, navigate as follows;
To access the menu displays within the
‘USER’ folder from the main burner
display, navigate as follows;
The language options are Italian or
English. Once exited, the language
selection shown on screen becomes
the displayed language.
The ‘VIEW’ menu folder has 4 readout
displays as follows;
Burner
a.
46
b.
LUX %: Light illumination
measured by the Photocell.
Readout is instantaneous.
STEP AUTO: Each boiler function
is allocated a two digit number.
This menu displays the function
the boiler is in when viewing. The
list of the functions are as follows:
03 - Wait Boiler Thermostat
13 - Pellet Burner Firing
14 - Turning Off Brazier
15
15
26
29
33
34
40
41
42
45
46
46
47
- Brazier is moving back
- Brazier is moving forward
- Post Purge
- Air Pressure Error
- Failed Pellet Lighting
- Servo Motor Blocked
- Pre-load
- Wait Lighting (Ignition)
- Wait Lighting (Lighting Feed Reduced)
- Wait Lighting (Flame Stabilisation)
- Safety Charge Pipe Thermostat
- Safety Boiler Thermostat
- Probe Fault
c.
VIEW CLE BRAZ Total pellet feed
auger run time since brazier last
cleaned. When ≥ ‘‘T16’ brazier
cleaning operation will commence.
Resets after each brazier clean.
d.
VIEW CLE BOILER Total pellet
feed auger run time since boiler
last cleaned. When ≥ ‘‘T17’ boiler
cleaning operation will commence.
Resets after each boiler clean.
10 Commissioning
For double boiler installations this
procedure must be carried out in full on
both boilers.
10.1 Equipment Required
To carry out a complete and
comprehensive commissioning of the
Grant Spira wood pellet boiler the
following equipment is required.
•
Draught meter.
•
Flue gas analyser (with “wood
pellet” fuel setting).
•
Container of at least 1 litre capacity.
lower connections on the left side of
the burner. Refer to Figure 8-4.
•
On double boiler installations, repeat
the process for the second boiler.
10.2.3 Washdown System
Check the following:
•
•
That corrosion inhibitor and, where
necessary antifreeze, is present in
the system water. Refer to Section
4.6.
That a magnetic in-line filter has
been fitted in the system. Refer to
Section 4.6.
The solenoid valve is connected to
an uninterrupted mains water
supply via the flexible hose and
valve (with integral check valve)
provided with the boiler.
Check the following:
•
All valves in this water supply are
open.
•
The condensate trap (supplied with
the boiler) and condensate disposal
pipework has been fitted correctly.
Refer to Section 5.
•
If a condensate pump is fitted, that
a condensate holding tank of at
least 40 litres capacity has also
been installed. Refer to Section 5.
•
Both the boiler and heating system
is filled and vented.
•
On sealed systems the expansion
vessel charge pressure is correct
and system is filled to correct
pressure.
10.2.5 Flue System
Check the following:
For any leaks at joints, fittings, etc.
•
•
The 5-way plug (from the flue fan
and washdown solenoid valve) is
fully inserted in the socket at the
top right rear of the boiler. Refer to
Figure 8-2.
•
The two 7-way plugs (from the
boiler control panel) are fully
inserted into the corresponding two
That both the overheat thermostat
probe and thermistor bulb are fully
inserted in the boiler waterway
pocket, and the retaining clip is
fitted. Refer to Figure 10-2.
•
The condition of thermistor cable
and thermostat capillary, i.e. not
damaged, broken or kinked.
Refit the control panel cover and
secure with the six screws
previously removed.
10.2.4 Condensate Disposal System
Check the following:
The boiler drain cock (supplied with
the boiler) is closed.
The 5-way plug (from the hopper) is
fully inserted in the socket at the
top left rear of boiler. Refer to Figure
8-3.
•
On double boiler installations, repeat
the process for the second boiler.
•
•
10.3.1 Control Panel
Isolate the electrical power to the
hopper and boiler.
•
The auto air vent (supplied with the
boiler) is open.
10.2.2 Electrical Connections
Check the following:
10.3 Boiler
Unscrew and remove the six self
tapping screws securing the boiler
control panel cover and lift the cover off
the control panel.
•
•
9.2.6 Combustion Ventilation
Check that the combustion air supply
conforms to the relevant requirements
of The Building Regulations Approved
Document J, for solid fuel appliances
with a draught stabiliser. Refer to
Section 7.1.
The solenoid valve head is correctly
fitted and secured in position with
the steel clip provided with the
boiler.
10.2.1 Heating System
Check the following:
•
The washdown system manifold
pipe is correctly fitted into either the
right or left side of the boiler, as
required to suit the type of hopper
used.
The flue system conforms to the
relevant requirements of The
Building Regulations Approved
Document J for solid fuel appliances.
•
10.2 Preliminary Inspection
Before switching on the power supply
to the hopper and boiler check the
following:
The 6-way plug (from the pellet
auger) is fully inserted into the
upper connection on the left side of
the burner. Refer to Figure 8-4.
•
The draught stabiliser damper, on
the fan box, is unobstructed and
free to move. Ensure that the damper
locking lever is in the ‘unlocked’
position’. Refer to Figure 10-1.
Figure 10-1: Draught stabiliser
Figure 10-2: Boiler control panel
(cover removed)
10.3.2 Combustion Chamber
Open front access cleaning door and
check:
•
The ash pan is empty and correctly
positioned on the base of the
combustion chamber.
•
The baffle (in the top of the
combustion chamber) is correctly
located on the fixing brackets at
both sides. Refer to Figure 10-3.
Close the front access cleaning door
and ensure that door catch is fully
engaged (to activate door cut-out
switch).
Commissioning
It is important that the following
commissioning procedure is carried out
following installation to ensure safe and
efficient operation of the boiler.
47
10 Commissioning
Primary Heat Exchanger
Check the shaker unit (located in the
top of the primary heat exchanger) is
operating freely and that the spirals are
moving up and down with two
intermittent vertical motions.
Figure 10-3: Combustion chamber
baffle
10.3.3 Heat Exchangers
To gain access to the top of both heat
exchangers:
• Remove the boiler top casing panel.
•
•
Unscrew and remove the two nuts
securing the front access panel and
remove it from the primary heat
exchanger.
Unscrew and remove the two nuts
securing the rear access cover and
remove it from the secondary
(condensing) heat exchanger.
Secondary Heat Exchanger
Check the wash system manifold
(located under the top rear access
door) is spraying water directly into
each flue gas tube of the unit. Refer to
Figure 10-4.
•
Slacken the two screws securing
the manifold pipe flange to the
boiler side panel.
•
Carefully rotate the pipe until jets
spray directly into tubes.
•
Tighten the two screws to secure
manifold pipe in this position.
Commissioning
48
Switch on the electrical supply to
the hopper and boiler. The burner
fan should briefly run.
•
Press and hold down the
‘CLEANING’ switch, on the boiler
control panel, in the ‘TEST’ position.
•
Release switch to automatically
reset cleaning function back to
‘AUTO’.
•
Note that setting this switch to
‘TEST’ does NOT operate the
burner cleaning function, but only
that of the two heat exchangers.
Ensure that only pellets that comply
with ENplus A1 standard, to EN14961,
are used with the Grant Spira boiler.
Refer to Section 3.
Figure 10-4: Correct jet spray (into
tubes)
WARNING
Ensure that fingers are clear of all
moving parts inside the top of the
primary heat exchanger BEFORE
operating ‘CLEANING TEST’ switch.
Fill the hopper with pellets either:
•
By hand from bags, or
•
Automatically from a bulk pellet
store, via a bulk auger or Grant
SPIRA-VAC vacuum pellet feed
system.
When using a Grant SPIRA-VAC
system, refer to the Installation
instructions supplied with the Grant
SPIRA-VAC vacuum pellet feed system.
10.5 Safety Device Checks
Figure 10-5: Incorrect jet spray
!
WARNING
Before filling the pellet hopper for
the first time with pellets, ensure that
hopper is empty of all other debris or
objects, e.g. screws, nuts, etc.
Test the automatic cleaning functions as
follows:
•
Figure 10-6: Auger fixing
!
Check that the spiral baffles in the
secondary heat exchanger are all in
place and are all aligned with the top
edges running ‘front to back’.
Set the ON/STANDBY switch to
STANDBY.
Check the pellet feed auger is fully
inserted into the pellet hopper and
secured with the single screw through
the auger fixing flange. Refer to Figure
10-6. Do NOT fill hopper with pellets
until AFTER the auger is fitted and
secured.
If the water jets are not spraying directly
into the flue gas tubes, adjust the spray
as follows:
Check that the spiral baffles in the
primary heat exchanger are all in place.
Lift and drop each one to check all are
free to move in their respective tubes.
•
10.4 Pellet Hopper
Refit both front and rear access panels
and secure with the nuts previously
removed. Do not overtighten.
10.5.1 Burn Back Thermostat
When the burner display reads ‘WAIT
BOILER THERMOSTAT’ check the
operation of the burn-back thermostat
(on the pellet feed tube) as follows:
•
Remove the steel clip from the
thermostat.
•
Disconnect the lead from the
thermostat terminals. Refer to
Figure 10-7.
The burner display screen should
automatically go blank, as all power to
the burner has been interupted.
To make the burner operational again:
•
Re-connect the lead.
•
Refit the clip.
!
•
Disconnect the 7-way plug (No.1)
from the socket on the left side of
the burner. Refer to Figure 10-9.
•
Disconnect the pellet delivery hose
from the pellet feed tube (on the
burner) and place in a container of
at least 1 litre capacity. Refer to
Figure 10-10.
WARNING
The interlock on the combustion
chamber door Interrupts the power
supply to the burner if the door is
opened. IT DOES NOT IMMEDIATELY
EXTINGUISH THE BURNER FLAME.
If the burner door is opened whilst
the burner is firing, there can still be
a large uncontrolled flame from the
brazier.
10.6 Burner Settings
10.5.2 Combustion Chamber Door
Switch
When the burner display reads ‘WAIT
BOILER THERMOSTAT’ check the
operation of the combustion chamber
door interlock as follows:
•
The interlock is activated by
opening the combustion chamber
door.
•
Operate the door catch and open
the door.
•
The burner display screen should
automatically go blank, as all
power to the burner has been
interrupted.
To restart the display; close the door
and fully engage the door catch to
re-make the cut-out switch. Refer to
Figure 10-8.
Closing the door will reconnect the
power supply to the burner and the
display will return, confirming that the
door interlock is operating correctly.
With the electrical power to the
hopper and boiler Switched on, and
the burner ON/STANDBY switch set
to STANDBY, check that ALL burner
settings in the ‘INSTAL’ (Installer)
menu are as given in Section 9.6.
Figure 10-10: Pellet delivery hose
•
Refer to Section 9.7 for details of how
to access and check these settings.
Insert the 6-way plug into the 7-way
plug. Refer to Figure 10-11. It is not
possible to connect these two
plugs incorrectly as they will only
fit together one way. The feed
pellet feed auger will now run
continuously until the plug and
socket is disconnected.
Set the boiler temperature set point
using buttons 1 or 2 on the burner
control panel. Refer to Section 1.1 for
required flow and return temperatures.
10.7 Priming the Pellet
Feed Auger
The pellet feed auger MUST be fully
primed BEFORE attempting to start
the boiler.
Prime the auger as follows:
•
Disconnect the 6-way plug (No.3),
from the pellet feed auger, from the
upper socket on the left side of the
burner. Refer to Figure 10-9.
Figure 10-8: Combustion door catch
Figure 10-9: Pellet feed auger plug (3)
Figure 10-11: Connection of the two
plugs
•
Leave the auger running until there
is a continuous flow of pellets from
the pellet delivery hose. This will
take between 15 to 20 minutes.
•
Disconnect the two plugs from
each other and the auger will stop.
The pellet feed auger is now fully
primed.
•
Refit the pellet delivery hose onto
the pellet feed tube of the burner.
•
Check the condition of the pellet
delivery hose and ensure it forms an
air tight seal each end. Check for
damage and replace if necessary.
Commissioning
Figure 10-7: Disconnecting burn-back
thermostat
The boiler comes with the burner
pre-set from the factory. However,
the burner settings should be
checked as part of the
commissioning process and
recorded on the Commissioning
Report form. Refer to Section 10-12.
49
10 Commissioning
A damaged pellet delivery hose can
allow a back draught through the boiler
resulting in the pellet tube (burn back)
thermostat operating and shutting
down the burner.
After completing the start-up sequence,
the burner should be firing at maximum
output and the display on the burner
control shows ‘BURNER FIRING
100%’.
•
10.9 Combustion Chamber
Draught
Finally, re-fit both the 6-way and
then 7-way plugs to their
corresponding sockets on the left
side of the burner. Ensure that both
plugs are fully pushed home until
the small catch clicks into place.
Refer to Figure 10-9.
!
WARNING
Ensure the pellet delivery hose forms
an air tight seal each end and that
the hose is not damaged. Leakage of
air could cause increased
temperature in the pellet delivery
hose and result in the burn-back
thermostat shutting down the burner.
10.9.1 Burn Back Thermostat
The combustion chamber draught must
be checked and adjusted (where
necessary) as follows:
•
Allow the boiler to run for a period
of 15 minutes, until the boiler and
flue system are warmed up.
•
Ensure the burner display is
showing ‘BURNER FIRING 100%’.
•
Remove the screw from the draught
test point, located to the left of the
burner on the combustion chamber
door. Refer to Figure 10-12.
•
10.8 Lighting the Boiler
Ensure that the electrical supply to the
hopper and boiler is switched on
connected and that the heating system
controls are operating and are calling
for heat.
•
After setting the zero on the
draught gauge, insert the end of the
draught gauge sample tube into the
test point on the door. Ensure that it
is pushed through the door
insulation and into the combustion
chamber.
A draught reading of between 0.1
and 0.15mbar is required (0.04 and
0.06 in.wg).
Set the burner ON/STANDBY switch to
ON. The flue fan will start and pellets
will be delivered to the burner.
Figure 10-13: Draught stabiliser arm
If it is necessary to increase the
draught, but the weight fitted is already
at the end of the damper arm, extra
slotted disc weights (supplied with the
boiler) can be used.
These weights are fitted on the ‘flue
end’ of the damper arm, as follows:
•
Slacken the grub screw and slide
the fitted weight along the arm
towards the damper.
•
Fit one of the slotted weights onto
the arm.
•
Secure by inserting a flat bladed
screwdriver into the slot and
twisting it. Refer to Figure 10-14.
•
Slide both the weights to the end of
the shaft and secure by tightening
the grub screw in the fitted weight.
Refer to Figure 10-15.
Repeat this process as necessary to
achieve the required draught.
Refer to Section 9.1 for details of the
burner start-up, running and shut down
sequences.
Commissioning
!
50
NOTE
If the boiler ON/STANDBY switch is
set to STANDBY during the initial
pellet pre-load period, the pellet feed
will continue until the pre-load is
complete. The burner will then
complete the shut-down sequence
before it can start-up again, even if
the ON/STANDBY switch is reset to
ON.
If the ON/STANDBY switch is set to
STANDBY during the start-up
sequence, but AFTER the pre-load is
finished, then the burner will
immediately enter and complete the
shut-down sequence before it can
start-up again, even if the
ON/STANDBY switch is reset to ON.
Figure 10-12: Draught test point
10.9.2 Draught Stabiliser Adjustment
To adjust the combustion chamber
draught reading, re-position the weight
on the stabiliser door arm as follows:
•
To increase draught – move the
weight away from the damper (or
add extra weights if necessary –
see right).
•
To decrease draught –move the
weight closer to the damper.
Refer to Figure 10-13.
Figure 10-14: Fitting slotted disc weight
Figure 10-15: Draught stabiliser weights
This is located within the fan box and is
supplied set fully closed.
Opening this slider plate allows some of
the flue gases to by-pass the flue fan,
and reduces the combustion chamber
draught. Refer to Figure 10-16.
•
If necessary make any fine
adjustment of the combustion
chamber draught by altering the
position of the weight on the
damper arm.
!
NOTE
The normal means of setting the
correct combustion chamber draught
is by adjusting the position of the
damper weight, as detailed in
Section 10.9.2.
ONLY adjust the slider plate when
absolute necessary, i.e. when the
draught reading is too high and
beyond the adjustment range of the
damper weight.
10.10 Flue Gas Analysis
Check the %CO2 in the flue gases as
follows:
Figure 10-16: Fan box slider plate
•
Ensure the burner display is
showing ‘BURNER FIRING 100%’.
•
Remove the screw from the
combustion test point, located at
the left rear corner of the rear
access cover (on the secondary
heat exchanger).
Refer to Figure 10-17.
If required, adjust the slider plate as
follows:
•
With the boiler firing at maximum
output and the burner display is
showing ‘BURNER FIRING 100%’.
•
Set the draught stabiliser weight
midway on the damper arm.
•
Unscrew and remove the single
screw securing the end of the slider
plate arm.
•
This screw is located on the right
hand side of the fan box immediately above the draught
stabiliser.
•
Insert the analyser probe a minimum
of 100mm into the test point.
•
Monitor the %CO2 for a few
minutes to see the maximum and
minimum values reached.
•
The %CO2 measured should range
between a maximum of 12% and a
minimum of 10%.
Go to the ‘POWER MAXIMUM’
value and adjust the burner fan
speed using buttons 5 and 6 on the
burner control panel. Refer to
Section 9.4.
•
To decrease the %CO2 – increase
the fan speed using button 6.
•
To increase the %CO2 – decrease
the fan speed using button 5.
•
To confirm the change in the
‘POWER MAXIMUM’ fan setting,
press button 4 twice, to exit the
‘SETUP FAN’ and ‘INSTAL’ menus
and return to the normal control
panel display (showing H2o and
SET temperature).
•
Monitor the %CO2 for a few
minutes to see if the maximum and
minimum values are 12% and 10%
as required.
•
If necessary make a further
adjustment of the fan speed and
check the resulting %CO2 as
described above, until it remains
within the required maximum and
minimum limits.
•
Record the maximum and minimum
values on the Commissioning
Report form. Refer to Section 10.12.
!
NOTE
It is essential to continue to monitor
the combustion chamber draught,
whist adjusting the CO2 in the flue
gases, and to adjust the draught
stabiliser to keep it within the
required limits. Refer to Section 10.9.
On double boiler installations, the above
process – as covered in Sections 10.3
to 10.10 – must be fully carried out on
BOTH boilers.
•
Carefully pull out the end of the
slider arm whilst monitoring the
combustion chamber draught on
the draught gauge.
•
When the draught gauge indicates
a draught midway between 0.1 to
0.15mbar the slider position is
correct.
•
Without moving the position of the
slider plate, bend up the end of the
slider arm so the nearest hole in the
arm lines up with the threaded hole
in the fan box.
Figure 10-17: Combustion test point
Secure the slider arm to the fan box
using the screw previously
removed.
•
•
•
10.11 Customer Handover
If necessary the %CO2 may have to be
adjusted to be within these limits, as
follows:
Access the ‘INSTAL’ (Installer)
menu in the burner control settings
and go to the ‘SETUP FAN’ sub
menu.
The customer/user must be informed of
the correct operation and use of their
Grant Spira wood pellet boiler
installation. This must include the
following information:
•
The use of the boiler controls – how
to switch the boiler off and on, as
required. Refer customer to the
User Instructions at the back of this
manual.
Commissioning
10.9.3 Fan Box SliderPlate
If the combustion chamber draught is
too high, and adjustment of the draught
stabiliser alone cannot bring it within the
required range of 0.1 to 0.15mbar (0.04
and 0.06 in.wg), it may be necessary to
adjust the setting of the fan box slider
plate.
51
10 Commissioning
•
The use of the heating system
controls – how to set the
programmer, room and cylinder
thermostats, etc.
•
The importance of using the correct
type of wood pellet.
•
The need to routinely check the
pellet level in the pellet hopper and
how to re-fill it (hopper only
installations)
•
•
•
•
The need to routinely check the
pellet level in the bulk pellet store
(bulk pellet store installations only).
Preliminary Inspection
Tick box
Heating system
Electrical connections
Condensate disposal
Flue system
Combustion ventilation
Boiler
Control panel
Combustion chamber
Heat exchangers – primary
The need to have the boiler
serviced either annually or when
‘SERVICE’ is shown on the burner
control panel display (whichever
comes first). Refer to Section 1.5
and User Instructions.
Heat exchangers – secondary
That servicing should only be
carried out by a Grant Approved
installer.
The Commissioning Report form
(supplied with the boiler) must be
completed at the end of the
commissioning process. Refer to
Section 4.7.
For a double boiler installation, a
commissioning form must be
completed for each of the two boilers.
The following information must be
entered on the form:
Commissioning
The following checklist must be used in
conjunction with the preceding
information given in this section:
How to access the ash pan and the
need to periodically empty the ash
pan. Refer to Section 1.5 and the
User instructions.
10.12 Commissioning Report
Form
52
10.13 Commissioning Check
List
•
Boiler details (model, serial No., etc.)
•
Combustion readings
•
Installation details
•
Burner settings
•
Customer handover details
The completed form must be signed by
both installer and customer/user.
A copy of the completed form must be
left with the customer/user, one must
be returned to Grant UK and the
remaining third copy retained by the
Installer.
Pellet Hopper
Auger
Pellets
Safety Device Checks
Burn-back thermostat
Combustion chamber door switch
Priming Pellet Feed Auger
Lighting the Boiler
Combustion Chamber Draught
Flue Gas Analysis
Customer Handover
Commissioning Report Form
11 Boiler Servicing
11.1 General
11.2 Checks Before Servicing
11.3 Heating System
It is essential that the Grant Spira boiler
is serviced at regular intervals of no
longer than 12 months OR when the
‘SERVICE’ is shown on the burner
control panel display.
BEFORE starting any service work on
the boiler or pellet storage/supply
installation:
If boiler is part of a sealed heating
system, check the following:
•
System pressure
•
•
Pressure relief valve operation
•
Expansion vessel air charge pressure
(when the system pressure is zero)
The burner will automatically indicate
‘SERVICE’ on the burner control panel
display once the pre-set period of pellet
feed auger run time (‘HOURS
SERVICE’) is achieved. Refer to
Section 9.7 for details on how to
access and check this setting in the
‘INSTAL CLEAN’ sub-menu of the
burner settings.
This interval is based on the auger
running time, i.e. the actual quantity of
pellets used based on the pellet feed
auger rate and pellet delivery settings.
Refer to Section 9.7 for details on how
to access and check this setting in the
‘POWER PELLET’ sub-menu of the
burner settings.
The ash pan (located inside the
combustion chamber) will need to be
periodically emptied. This simple task
must be carried out by the user at
MONTHLY intervals for the FIRST
THREE MONTHS. Thereafter, the ash
pan should be emptied regularly, on at
least a monthly basis, or as indicated
by the amount of ash found during the
first three months. Two carrying handles
are supplied with the boiler to allow
removal of the ash pan when hot.
•
•
Set the ON/STANDBY switch, on
the boiler control panel, to
STANDBY. If the boiler was
operating, wait for it to shut-down
and ‘WAIT BOILER THERMOSTAT’
is shown on the burner control
panel display before proceeding
further.
Isolate the electrical supply to the
hopper and boiler and remove the
5A fuse from the fused spur.
Disconnect the 5-way plug (on the
lead from the hopper) from the
socket at the left rear of the boiler.
Refer to Figure 11-1.
NOTE
•
Flow and return connections
•
Automatic air vent (at rear of boiler)
•
Drain cock (at lower rear of boiler)
Remake any joints and re-check
tightness of any fitting that may be
leaking.
Re-fill and vent the system to the
required pressure. Refer to Section 6.
•
If a double boiler installation, remove
the 5-way plug from both boilers.
On either sealed or open-vented
systems:
•
Disconnect the 5-way plug (on the
lead from the flue fan and solenoid)
from the socket at the right rear of
the boiler. Refer to Figure 11-2.
•
Inspect and clean the in-line
magnetic filter in accordance with
the filter manufacturer’s instructions.
•
Ensure that adequate corrosion
protection is present in system.
This will allow the hopper to be moved
to give easy access to the rear of the
boiler for servicing.
11.4 Flue System
11.4.1 Flue Terminal
Check the flue terminal and ensure that
it is not blocked or damaged.
11.4.2 Fan Box
Unscrew the eight screws securing the
flue inspection plate on to the fan box
and remove the plate. Inspect inside of
both flue and fan box. Refer to Figure
11-3. Clean any ash deposits from the
inside of the fan box, as necessary.
Servicing and replacement of parts
must only be carried out by a Grant
Approved installer who has successfully
completed the Grant Spira wood pellet
boiler training course.
!
Check the boiler for any indication of
leaks from:
Clean the flue by sweeping, as required.
Figure 11-1: Disconnecting hopper
5-way plug
Replace plate and secure using the
eight screws, ensuring that it is
correctly sealed to the fan box on the
neoprene gasket.
Figure 11-2: Disconnecting fan
5-way plug
Figure 11-3: Fan box inspection
opening
!
Boiler Servicing
Details of every service should be
entered in the Service log at the front
of this manual.
WARNING
Before starting any work on the
boiler, or on the pellet storage and
supply installation, please read the
health and safety information in
Section 15.
53
11 Boiler Servicing
11.4.3 Draught Stabiliser
Check draught stabiliser damper is free
to move. Remove draught stabiliser
from fan box and clean if required.
Refer to Figure 11-2.
Re-fit draught stabiliser to fan box and
check damper is free to move.
Draught stabiliser setting must be
checked when boiler is operational.
Refer to Section 11.9.
!
WARNING
Failure to maintain a clean flue can
result in the emission of flue gases
into the dwelling or damage from
potential fire in the flue.
11.5 Combustion Ventilation
Check that the combustion air supply
conforms to the relevant requirements
of The Building Regulations Approved
Document J, for solid fuel appliances
with a draught stabiliser. Refer to
Section 6.1.
Figure 11-6: Boiler control panel
(cover removed)
Check that all ventilation openings are
free from any obstructions, both inside
and outside. If necessary remove any
blockages (e.g. fluff, dog hair, leaves,
etc.).
11.6 Boiler
Figure 11-4: Draught stabiliser
11.4.4 Flue Fan
Unscrew the four screws securing the
flue fan to the fan box and remove the
fan. Clean any ash deposits from the
fan blades and mounting plate. Refer to
Figure 11-3.
Refit fan to fan box and secure with
screws. Ensure that it is correctly sealed
to the fan box on the neoprene gasket.
Refit the 5-way (on the lead from the
flue fan and solenoid) into the socket at
the right rear of the boiler. Refer to
Figure 11-2.
!
!
Boiler Servicing
WARNING
Ensure the electrical supply to the
hopper and boiler is isolated by
disconnecting the 4-way plug from
the socket (on the flying lead) at the
rear of the hopper.
Unscrew and remove the six self
tapping screws securing the boiler
control panel cover and lift the cover off
the control panel.
Proceed as follows:
•
Check both the overheat
thermostat probe and thermistor
bulb are fully inserted in the boiler
waterway pocket, and the retaining
clip is fitted. Refer to Figure 11-6.
•
Check the condition of thermistor
cable and thermostat capillary, i.e.
not damaged, broken or kinked.
•
Grease the edge of the shaker
motor cam with high temperature
grease. Refer to Figure 11-7.
CAUTION
When cleaning the fan blades ensure
they are all thoroughly cleaned.
Uneven cleaning will result in the fan
being ‘out of balance’ and could
cause damage to the fan motor.
54
11.6.1 Contro Panel
Figure 11-7: Shaker motor cam location
11.6.2 Heat exchangers
To gain access to the top of both heat
exchangers. (Refer to Figure 11-7):
•
Remove the boiler top casing panel.
•
Unscrew and remove the two nuts
securing the front access panel and
remove it from the top of the
primary heat exchanger.
•
Unscrew and remove the two nuts
securing the rear access cover and
remove it from top of the secondary
(condensing) heat exchanger.
Refit the control panel cover and secure
with the six screws previously removed.
Figure 11-8: Top of heat exchangers
Figure 11-5: Flue fan
•
Set the ON/STANDBY switch to
STANDBY.
•
Re-fit the 5-way plug (on the lead
from the hopper) into the socket at
the left rear of the boiler. Refer to
Figure 11-1.
•
Replace the 5A fuse in the fused
spur and switch on the electrical
supply to the hopper and boiler.
The burner fan should briefly run.
•
Press and hold down the
‘CLEANING’ switch, on the boiler
control panel, in the ‘TEST’ position
for about 60 seconds.
•
Release switch to automatically
reset cleaning function back to
‘AUTO’.
Note that setting this switch to
‘TEST’ does NOT operate the burner
cleaning function, but only that of
the two heat exchangers.
•
Unscrew the two screws securing
the manifold pipe flange to the
boiler side panel.
•
Carefully remove the wash system
manifold pipe through the side of
the secondary heat exchanger and
boiler.
Ensure that fingers are clear of all
moving parts inside the top of the
primary heat exchanger BEFORE
operating ‘CLEANING TEST’ switch.
•
Check and clean the manifold tube
thoroughly, ensuring that all the jets
are clear. Rinse inside of manifold
pipe to ensure all ash deposits and
other debris is removed.
•
Remove all of the stainless steel
spirals from the secondary heat
exchanger tubes.
Primary Heat Exchanger
Check the shaker unit (located in the
top of the primary heat exchanger) is
operating freely and that the spirals are
moving up and down with two
intermittent vertical motions.
•
•
Clean down any ash inside tubes,
using a suitable pipe brush, into the
base of the condensing heat
exchanger below.
Clean all ash deposits from top
chamber of secondary heat
exchanger (above tubes) and from
rear flue gas duct (at rear of
secondary heat exchanger) using
brush and vacuum.
Primary heat exchanger – clean as
follows:
•
Clean and check condition of all
spiral baffles. Replace if necessary.
•
Remove all of the mild steel spirals
by lifting them vertically up and out
from the primary heat exchanger
tubes.
•
Re-fit baffles into heat exchanger
tubes, such that all the top edges of
the baffles are running ‘front to
back’. Refer to Figure 11-5.
Clean down any ash inside tubes,
using a suitable pipe brush, into the
combustion chamber and ash pan
below.
•
•
Clean all ash deposits from top
chamber of the primary heat
exchanger (above tubes) and
shaker mechanism/plates, using
brush and vacuum.
•
Clean and check condition of all
spiral baffles.
•
Re-fit spiral baffles into heat
exchanger tubes, fitting them
through shaker plates.
•
Lift and drop each spiral to check
that all spirals are free to move in
their respective tubes.
Secondary heat exchanger – clean as
follows:
•
Shut off cold water supply to wash
system manifold.
Press and hold down the
‘CLEANING’ ‘TEST’ switch on the
boiler control panel.
Remove the securing clip from the
end of the solenoid valve shaft.
Then separate solenoid head from
valve body.
Ensure the electrical supply to the
hopper and boiler is isolated by
disconnecting the 4-way plug from
the socket (on the flying lead) at the
rear of the hopper.
•
•
•
•
Re-fit wash system manifold tube
using the two screws previously
removed, but do not tighten at this
stage (the wash system manifold
needs to be correctly aligned once
the boiler power supply is
reconnected).
Re-fit solenoid head to valve body
and secure in place with the spring
clip.
Test the automatic cleaning functions as
follows:
•
•
Check the ON/STANDBY switch is
set to STANDBY.
Re-connect the electrical supply to
the hopper and boiler by fitting the
4-way plug into the socket (on the
flying lead) at the rear of the hopper.
The burner fan should briefly run.
!
WARNING
If there is no movement of the shaker
system, isolate the electrical supply and
check that:
•
the motor and cam is rotating.
•
the cam follower is in contact with
the cam.
•
the condition of the cam follower
spring (located in the rear of the
control panel). Replace if necessary.
Secondary heat exchanger
Check the wash system manifold
(located under the top rear access
door) is spraying water directly into
each flue gas tube of the unit. Refer to
Figure 11-4.
If the water jets are not spraying directly
into the flue gas tubes, adjust the spray
as follows:
•
Slacken the two screws securing
the manifold pipe flange to the
boiler side panel.
•
Carefully rotate the pipe until jets
spray directly into tubes.
•
Tighten the two screws to secure
manifold pipe in this position.
Inspect the condition of the two access
panels before re-fitting. Replace any
damaged or worn rope seal or gaskets
if necessary.
Refit both front and rear access panels
and secure with the nuts previously
removed. Do not overtighten.
Ensure that the rear access panel is
fitted with the flue gas sample point in
the rear left hand corner.
Boiler Servicing
Operate the automatic cleaning function
in both heat exchangers, as follows:
55
11 Boiler Servicing
11.6.3 Combustion Chamber
!
WARNING
Ensure the electrical supply to the
hopper and boiler is isolated by
disconnecting the 4-way plug from
the socket (on the flying lead) at the
rear of the hopper, before proceeding.
•
Clean down the combustion
chamber side, back and base
surfaces, removing all ash deposits.
•
Clean any ash deposits from the
top of the burner hood and the
inner face of the combustion
chamber door.
•
Clean out the burner brazier to
remove as much loose ash as
possible using a vacuum.
Disconnect the pellet delivery hose from
the burner pellet feed tube. Then fully
open the combustion chamber door on
the front of the boiler and clean as
•
Refit the combustion chamber
baffle in position ensuring it is
seated correctly on the fixing
brackets. Refer to Figure 11-8.
follows:
•
Refit the ash pan in the base of the
combustion chamber.
•
Grease the front cleaning door latch
mechanism and close the door.
•
Before moving the combustion
chamber baffle (located in the top of
the combustion chamber) remove
all ash deposits from the upper
surface using a vacuum. Refer to
Figure 11-8.
•
Remove and inspect the baffle and
clean off any remaining deposits
using a brush and vacuum.
•
Check the baffle condition and
replace if necessary.
•
Clean the underside of upper rear
section of the primary heat
exchanger (at the rear of
combustion chamber) BEFORE
replacing baffle.
•
Remove the red burner cover by
loosening the four M5 screws (two
each side of the cover) and lifting it
off the burner.
•
Whilst supporting the burner,
unscrew and remove the two M8
burner securing nuts, one on each
side of the burner.
Refer to Figure 11-10.
11.7 Burner Brazier
Figure 11-11: Burner fixing nuts
!
WARNING
Ensure that electrical supply to the
hopper and boiler is isolated by
disconnected at the 4-way plug from
the socket (on the flying lead) at the
rear of the hopper, before proceeding.
11.7.1 Removal of Burner
To clean the burner thoroughly it will be
necessary to remove it from the boiler,
as follows:
•
•
Carefully withdraw the burner from
the combustion chamber door
taking care not to damage the
burner door gasket.
•
Place the burner on a suitable
bench (e.g. portable ‘workmate’
type bench or similar) to work on.
11.7.2 Cleaning Burner Brazier
Dismantle and clean the burner as
follows:
•
Disconnect the three plugs from the
left side of the burner. Refer to
Figure 11-9.
Remove the burner hood by
loosening the two M5 bolts
(highlighted below) each side of the
brazier. Slide the forwards and then
up to disengage the hood from the
burner. Refer to Figure 11-11.
Boiler Servicing
Figure 11-9: Combustion chamber
baffle
56
!
CAUTION
Extreme care is required when
empting the ash pan as smouldering
ash could be present and cause
serious damage to persons or
property. Ensure the ash is disposed
of in a safe manner.
Figure 11-10: Burner plugs
•
Remove the steel clip from the burn
back thermostat (on the pellet feed
pipe) and disconnect the lead from
the thermostat terminals.
Figure 11-12: Removal of burner hood
•
Clean and inspect the hood for any
damage or distortion. Replace if
necessary. Remove all ash deposits
and check that all air holes (on the
inside surface of the hood) are clear.
Remove both the two brazier flame
plates and photocell back plate
from brazier.
•
Unscrew and remove the two M6
nuts and washers on either side of
the brazier chassis securing the
3-sided grate enclosure.
NOTE
After a period of time in use, the
semi circular end wall of the brazier
hood may distort or show minor
cracks. This does not affect the
operation of the burner. The hood
should only be changed if there is
considerably deterioration.
•
Open the brazier manually by
operating the release switch on the
servo motor and carefully pulling on
the end wall of the brazier.
•
To operate the switch and release
the motor, either press and hold
down the switch down or lift and
hold the switch up – depending on
motor type used.
Refer to Figure 11-12.
•
Remove the four M6 screws from
inside the brazier and remove the
grate enclosure.
•
Unscrew and remove the two M6
screws and washers (one each side
of the brazier chassis) securing the
ignition element mounting plate, and
remove it from the brazier chassis.
•
From below the burner, unscrew
and remove the single cap screw
attaching the push rod of the
moveable brazier base to the shaft
of the servo motor.
•
Disengage the push rod from the
motor shaft and remove brazier base
assembly from the brazier chassis.
Inspect all components for distortion or
damage and replace if necessary.
Clean all ash and clinker deposits from
all surfaces (in particular the upper
surface of the brazier chassis and the
underside of the brazier base assembly)
using wire bush and, where necessary,
a flat scraper.
Figure 11-13: Manual opening of
brazier
!
Ensure that all air holes are clear.
Reassemble the brazier using the
following procedure:
WARNING
•
DO NOT ATTEMPT TO FORCE THE
BRAZIER OPEN WITHOUT
OPERATING THE SERVO MOTOR
REALEASE SWITCH.
Fit the moveable brazier base
assembly to the burner and
reconnect the pushrod to the motor
shaft using the cap screw.
•
Failure to operate the servo motor
release switch WILL result in damage
to the servo motor gears.
Whilst operating the servo motor
release switch, push the brazier
base assembly fully back into the
brazier chassis.
•
Insert the brazier clearance gauge
plate (supplied with the boiler)
between the brazier chassis and
brazier base assembly. Refer to
Figure 11-13.
•
The clearance gauge should slide in
using manual force only. DO NOT
FORCE THE GAUGE INTO THE
BRAZIER!
•
Reassemble the remainder of the
brazier, using the reverse of the
dismantling procedure.
•
Leave all screws loose until all
components (excluding the burner
hood) are assembled correctly.
With the brazier open, dismantle the
brazier to thoroughly clean all parts as
follows, referring to Figure 13-2:
•
Unscrew and remove the upper two
M6 nuts and washers on either side
of the brazier chassis, securing the
two brazier flame plates.
•
Remove the four M6 screws from
the inside of the brazier.
•
Unscrew and remove the two M6
screws securing the photocell back
plate to the burner.
•
BEFORE fitting the burner hood,
tighten the two screws securing the
photocell back plate to the front of
the burner.
•
Fit the burner hood and then finally
tighten all remaining burner fixings.
•
Remove brazier clearance gauge
from burner brazier.
•
Operate servo motor release switch
and manually open and close
brazier to check it is free to move.
Figure 11-14: Fitting brazier clearance
gauge
11.8 Burner Components
Check the burner fan inlet is clear of
debris.
If there is a build-up of debris remove
the burner fan and clean the fan blades
and fan housing. Refer to Figure 11-14.
11.8.1 Burner Fan
Check the burner fan inlet is clear of
debris. If there is a build-up of debris
remove the burner fan and clean the
fan blades and fan housing. Refer to
Figure 11-14.
Figure 11-15: Interior of burner
enclosure
Boiler Servicing
!
•
57
11 Boiler Servicing
11.8.2 Photocell
Remove photocell from mount. Check
and clean the photocell. Replace if
damaged. Refer to Figure 11-14.
Remove the two screws securing the
photocell mount and pull out the
photocell tube. Check the condition
and thoroughly clean the inside of the
tube. Refit tube to burner.
Ensure the photocell clamp is fitted
25mm from end as shown in Figure
11-15. Refit into photocell mount
Check the condition of the feed tube
and thoroughly clean the inside.
Check that the burn back thermostat is
correctly mounted and fixed to the top
of the tube.
Replace on burner, ensuring gasket is
correctly fitted, and secure with the
three screws
11.9 Re-fitting Burner
Before re-fitting the burner, check the
condition of the burner door gasket.
Replace if necessary.
With the gasket correctly located, re-fit
the burner to the combustion chamber
door. Carefully insert the burner brazier
through the opening and locate the
holes in the burner flange onto the M8
studs (on either side of the burner).
Figure 11-16: Photocell clamp position
The condensate trap(s) and
condensate outlet MUST be checked
on EVERY service and cleaned as
necessary. Failure to regularly check
and clean the condensate trap (or
traps) may result in damage to the
boiler and this will not be covered by
the product warranty.
11.10.2 Condensate Disposal Pipe
Check entire length of discharge pipe,
for any leaks or blockages. Clean or
replace as necessary.
Check any other traps in the condensate
disposal pipework. Dismantle and
thoroughly clean to remove any
deposits. Re-fit to condensate disposal
system pipework.
Check that any outlets to a gully or
hopper are not obstructed. Remove
any blockages.
11.8.3 Ignition Element
Remove and check the condition of the
ceramic heating element. Replace if
damaged.
To remove the element from the tube,
grasp the black grommet and pull out
of the tube. Do NOT pull on the
element power cable.
Check the condition of the pellet
delivery hose and ensure it forms an air
tight seal each end.
•
The condition of the holding tank.
Thoroughly clean to remove any
deposits.
Check for any damage to the hose and
replace if necessary.
•
Operation of the overflow cut-out
float switch.
A damaged pellet delivery hose can
allow a back draught through the boiler,
resulting in the pellet tube (burn back)
thermostat operating and shutting
down the burner.
•
The pump is operating correctly.
Check the condition and thoroughly
clean the inside of the tube. Replace
the tube in the burner and secure with
the screw.
Check that the ceramic element is
correctly fitted into the ceramic socket.
Replace the ignition element in the
tube, ensuring that the element is
correctly positioned inside the tube.
Refer to Figure 11-16.
Boiler Servicing
NOTE
Re-connect the three plugs to their
corresponding sockets on the left side
of the burner. Ensure that each plug is
fully pushed home until the small catch
clicks into place. Refer to Figure 11-9.
Unscrew and remove the single screw
securing the ignition element tube and
pull it out of the burner.
58
Secure the burner to the door with the
two M8 nuts previously removed.
!
Figure 11-17: Ceramic ignition element
11.8.4 Pellet Feed Tube
Unscrew the three fixing screws and
remove the feed pipe and gasket from
the top of the burner.
Check the condition of the gasket and
replace if necessary.
11.10 Condensate Disposal
System
11.10.1 Condensate Trap
Disconnect the condensate disposal
system from the outlet at the back of
the boiler. Check that the boiler
condensate outlet is clear. Remove any
blockage or ash build-up.
Remove the condensate trap (supplied
with the boiler) from the condensate
disposal system. Dismantle and check
the condition of the trap.
Thoroughly clean out the trap to
remove any deposits and re-fit to
condensate disposal system.
Reconnect the disposal system to
boiler outlet.
11.10.3 Burner Settings
If a condensate pump is fitted to the
system, check:
11.11 Burner Settings
With the electrical power to the hopper
and boiler Switched on, and the burner
ON/STANDBY switch set to STANDBY,
check that ALL burner settings in the
‘INSTAL’ (Installer) menu are as given in
Section 9.6.
Check the burner control settings
match those set on commissioning (i.e.
as recorded on the Commissioning
Report form), a copy of which was left
with the householder/user.
Refer to Section 9.7 for details of how
to access and check these settings.
Reset the SERVICE timer as follows:
•
Go to the ‘CLEAN’ sub menu in the
installer (‘INSTAL’) menu
•
Go to the ‘RESET SERVICE’ setting.
•
Press button 3 to reset timer to zero.
Refer to Section 9.7.1.3 for further
details on settings.
11.12 Safety Device Checks
The following safety checks must be
made before putting the boiler back
into operation:
11.12.1 Burn Back Thermostat
Check operation of burn back
thermostat. Follow the procedure given
in Section 10.5.1
11.12.2 Combustion Chamber Door
Switch
Check operation of combustion
chamber door switch. Follow the
procedure given in Section 10.5.2.
11.13 Combustion Checks
To ensure safe and efficient operation of
the boiler, it is essential that the boiler
combustion is re-checked and adjusted
as necessary.
11.13.1 Combustion Chamber
Draught
Check the combustion chamber
draught, and adjust the draught
stabiliser setting as required. Follow the
procedure given in Section 9.9.
11.13.2 Flue Gas Analysis
Check the %CO2 in the flue gases
and adjust the burner fan setting as
required. Follow the procedure given in
Section 10.10.
!
WARNING
Boiler Servicing
To ensure safe and efficient
operation of the boiler it is important
that boiler/burner is re-commissioning
as detailed in Section 10.
59
12 Fault Finding
12.1 General
If a fault occurs with the boiler, the
display screen on the burner control
panel helps to identify the nature and
cause of that fault.
There are THREE basic screen displays
that can be seen in the event of a fault,
as follows:
Figure 12-1: Normal screen display
a) Normal screen display (with WAIT
BOILER THERMOSTAT
continuously scrolling across the
lower part of the screen). Refer to
Figure 12-1.
If this is the case go to Section
12.2 for fault finding procedure.
b) No display – screen is BLANK.
Refer to Figure 12-2.
Figure 12-2: Blank screen display
If this is the case go to Section
12.3 for fault finding procedure.
c) An ERROR message is displayed.
If this is the case refer to ‘Error
Messages’ below.
It is essential, at this stage, to check
and identify which of these three
displays is shown on the burner control
panel screen, before proceeding to
attempt to diagnose the fault.
Error Messages
There are FOUR possible error
messages that can be displayed on the
burner control panel screen in the event
of a fault. In all cases the cursor will be
next to the error symbol (at the lower
left corner of the display). Refer to
Figure 12-3.
Fault Finding
The four possible error messages that
can be displayed (continuously scrolling
across the lower part of the screen) are
listed below. Each one identifies a
particular fault. Refer to the relevant
section of this manual for detailed
guidance to diagnose and rectify the
fault, as follows:
60
•
FAILED PELLET LIGHTING Go to Section 12.6
•
SERVO MOTOR BLOCKED Go to Section 12.7
•
PROBE FAULT Go to Section 12.8
•
AIR PRESSURE ERROR Go to Section 12.9
Figure 12-3: Error message screen display
12.2 Normal Screen Display - Boiler will not fire – but NO error message is displayed
H2o 60˚C
SET 75˚C
WAIT BOILE
Primary Fault
Secondary follow on checks
WAIT BOILER THERMOSTAT
Is the cursor next No
to the thermostat
symbol on burner
display?
Is the burner
‘ON/STANDBY’
switch set to
‘ON’ position?
Note 1
Yes
Is there a
Yes
sufficient quantity
of pellets in the
pellet hopper?
Are the heating
system controls
(Programmer,
Room Stat)
‘CALLING’ for
heat?
Note 3
Yes
Is there power
to terminal L2
on 4-way plug
at rear of
hopper?
Is there
continiuty
between
terminals T1 &
T2 on burner
plug No2?
No
Note 4
Yes
Is there power
across the
boiler ‘ON/OFF’
switch?
Yes
Is there power
at relay (in boiler
control panel)
on Terminals 21
& 24 when coil
is energised?
Note 5
Yes
Is H2o Temp
higher than the
set point minus
the Delta restart
temperature?
Note 2
No
No
No
No
No
No
No
Set burner
‘ON/STANDBY’
switch to ‘ON’
Fill hopper with
correct grade of
pellets
Set system
controls to call
for heat
Check the
switched live
supply to hopper/
boiler and rectify
as necessary
Check plug is
corrctly fitted
Replace faulty
switch
Replace faulty
relay
Yes
NO FAULT!
Boiler is waiting
for system temp
to drop
When there is a switched live supply
to the burner (i.e. when the heating
system controls are ‘calling’ and the
ON/STANDBY switch is set to ON), the
burner screen display shows a cursor
highlighted next to the boiler thermostat
symbol. Refer to Figure 12-4.
Figure 12-4: Burner screen display
Note 2 - Is the boiler above ‘DELTA
RESTART’ temperature?
If the boiler has exceeded the ‘TEMP
OF H2o’ setting (80°C) the boiler will
shut down. The boiler temperature will
have to fall to below the ‘DELTA
RESTART’ value (5°C below the boiler
set point temperature) before it can
start again. Refer to Section 9.1.
Note 3 - Is there a sufficient quantity
of pellets in the pellet hopper?
The effect of insufficient pellets will
depend on the type of pellet storage
used, as follows:
Using a pellet hopper only – if there
are insufficient pellets, the hopper
contents switch will break the switched
live to the boiler, causing ‘WAIT
BOILER THERMOSTAT’ to be
displayed. Refill the hopper to start the
boiler. Refer to Section 1.4.4 for further
details.
Using a bulk pellet store – the hopper
contents switch will control the
operation of either the bulk store auger
of Grant Spira-vac system. It will NOT
interrupt the switched live to the boiler
and thus ‘WAIT BOILER
THERMOSTAT’ will NOT be displayed.
The boiler would continue to operate
until ALL pellets in the hopper are used
and then stop, with ‘FAILED PELLET
LIGHTING’ displayed on the burner
control screen.
In this case, check that:
•
•
the bulk store auger, or Grant Spiravac system, is operating correctly
(refer to instructions supplied with
the Spira-vac system).
Rectify as necessary.
Note 4 - Is there a switched live from
the heating system controls
connected to the hopper/boiler?
Check that switched live from the
controls is correctly connected to
terminal L2 on the 4-way plug at the
rear of the hopper. Also check that this
4-way plug is fully pushed into the
socket on the flying lead, at the rear of
the hopper. Refer to Sections 8.4 and
8.5 for further details.
Check that ALL controls (programmer
and room thermostats) are ‘calling’ and
that there is a 230V output to the boiler.
Note 5 - Is there continuity between
terminals T1 and T2 on burner plug
No.2?
Disconnect the plug from left side of
burner and check for continuity
between terminals T1 and T2. Refer to
Figure 8-5 for wiring details.
Fault Finding
Note 1 - Is the curser next to the
thermostat symbol on the burner
display?
there are pellets in the bulk store
61
12 Fault Finding
12.3 No Screen Display - Boiler will not fire – blank screen
Primary Fault
Secondary follow on checks
BLANK DISPLAY SCREEN
Is electrical
Is the
Yes Are all plugs Yes Has the boiler No Has the pellet No
No
supply switched
correctly fitted?
overheat stat
feed tube stat
combustion
on? Is there
i.e. the three
tripped?
tripped? Unclip
chamber door
power to terminal
burner plugs & the
Unscrew black
& remove lead
closed & the
L1 on 4-way plug
plug from hopper
cover on control
from stat and
door catch fully
at rear of hopper?
to the boiler?
panel and check
check
engaged?
Note 1
No
Check electrical
supply to
hopper/boiler
& rectify as
necessary
Note 2
Note 3
Note 4
Is the power
to terminal L1
of burner plug
No.1?
Yes Check continuity Yes Is the ribbon Yes Replace burner
of burner fuse
cable fitted
PCB does this
on PCB.
correctly to PCB
rectify the
Is it OK?
and back of
problem?
display?
Note 5
No
Yes
Yes
No
No
No
No
No
Correctly fit
all plugs –
push fully into
sockets
Go to the
‘BOILER
OVERHEAT
STAT’ fault
finding chart
Go to the
‘PELLET TUBE
STAT’ fault
finding chart
Close door &
fully engage
door catch
Is door catch
microswitch
Operational?
Replace burner
fuse
Correctly fit
ribbon cable at
both ends
Correctly fit
ribbon cable at
both ends
Note 5
No
Replace
faulty door
microswitch?
Note 1 - Is there a permanent mains
live supply connected to the
hopper/boiler?
Check that the permanent live from the
fused spur is correctly connected to
terminal L1 on the 4-way plug at the
rear of the hopper. Also check that 4way plug is fully pushed into the socket
on the flying lead, at the rear of the
hopper. Refer to Sections 8.4 and 8.5
for further details.
Also check that 5-way plug from
hopper is fully pushed into the socket at
the top left rear of the boiler.
Fault Finding
Check that the fused spur is switched
ON and, if necessary, check the fuse
is OK.
Note 2 - Is there a permanent mains
live supply connected to the burner?
Check that the two 7-way plugs are
fully pushed into the two lower sockets
on the left side of the burner.
Also check for permanent live on
terminal L1 of burner plug No.1. Refer
to Figure 8-5.
Note 3 – Has the boiler overheat
thermostat tripped?
Unscrew and remove the black cover
from the overheat reset button on the
boiler control panel to check if boiler
overheat thermostat has tripped. If YES,
go to Section 12.4 for further guidance.
Note 5 - Is the combustion chamber
door closed and catch fully
engaged?
The combustion chamber door is fitted
with a safety interlock. Once the door
catch is disengaged all power to the
burner is interrupted. Refer to Section
10.5.2. Check that catch is FULLY
engaged when door is closed.
Note 6 - Is the door micro-switch
operational?
Check electrical continuity of door
micro-switch. Replace if faulty. Refer to
Figure 8-5 and 12-4.
Note 4 – Has the pellet feed tube
thermostat tripped?
Remove the steel retaining clip and
disconnect the lead from the pellet feed
tube (burn back) thermostat. Check the
reset button to see if thermostat has
tripped. if YES, go to Section 12.5 for
further guidance.
Figure 12-5: Location of door
micro-switch
62
Note 7 - Is the fuse on the PCB OK?
Remove fuse from holder on PCB and
check. Replace if necessary. Fuse type
F5AL250V. Refer to Figure 12-5.
Fault Finding
Figure 12-6: Location of fuse on PCB
63
12 Fault Finding
12.4 Boiler Overheat Thermostat
Primary Fault
Secondary follow on checks
BLANK DISPLAY SCREEN
BOILER OVERHEAT STAT TRIPPED
Is the central
Is the heating
Press reset.
Is the system
Yes
Yes Is overheat stat Yes
Yes
Yes
heating system
thermistor correctly
capillary in good
Is there now
circulating pump
& boiler full of
fitted in the pocket
condition & not
continuity between
operational?
water & vented of
(inside the boiler
damaged, kinked
the overheat stat
any air locks?
control panel)?
or broken?
terminals?
Unclip & remove
lead from stat &
check
Note 1
No
Fill & vent
system
Note 2
Note 3
No
Correctly fit
heating thermistor
in pocket &
reset overheat
stat
Note 1 - Is heating system and boiler
full of water and vented?
The central heating system must be
free of any air locks. Ensure auto air
vent on secondary heat exchanger (at
left rear of the boiler) is open and
vented. Vent the primary heat
exchanger on the heating flow pipe.
If installed on a sealed system: check
expansion vessel charge pressure and
correct as necessary. Check system
pressure and top-up as necessary.
Refer to Section 7 for sealed system
details.
Fault Finding
Note 2 - Is the heating thermistor
correctly fitted?
64
Isolate electrical supply and remove
boiler control panel cover.
Check that the heating thermistor, and
the overheat thermostat sensor, are
correctly fitted into the pocket (inside
the boiler control panel). Refer to
Section 10.3.1. Ensure that both are
held in place with the retaining clip
supplied.
No
Note 4
Is there any
restriction to
water flow from
the boiler?
Yes
Remove any
restriction e.g.
open any valves,
or remove
blockage
preventing flow
Note 5
No
No
Repalce faulty
overheat stat
Repalce faulty
circulating pump
Also, check the condition of the
thermistor and the overheat thermostat
capillary for any damage, replace if
necessary.
Note 3 - Is there continuity between
the overheat thermostat terminals?
With electrical supply isolated, reset the
overheat thermostat and check
electrical continuity across the
terminals. If no continuity found, replace
the overheat thermostat.
Note that the thermostat continuity can
be checked by removing the 7-way
plug (plug No. 1) from the socket on the
left of the burner and testing between
terminals T1 and T2. Refer to Section 8
and Figure 8-5.
Note 4 - is the circulating pump
operational?
With the burner ON/STANDBY switch
set to ‘STANDBY’, reconnect the
power supply to the boiler and check
that the heating system controls are
‘calling’. Set the switch to ON and the
pump should be running.
If not check that:
•
the pump is vented
•
there is power to the pump
•
that the pump is not seized/stuck
If pump has failed then replace it.
Note 5 - Is there any restriction to
flow from the boiler?
Check that all valves on the heating
circuit open and that there are no
blockages.
Rectify as necessary.
12.5 Pellet Tube Thermostat
Primary Fault
Secondary follow on checks
BLANK DISPLAY SCREEN
PELLET TUBE STAT TRIPPED
When pellet
Yes
tube has cooled does pressing
RESET button
on stat correct
the fault?
Note 1
No
Is the pellet
delivery hose
damaged?
Note 3
Is the lead correctly
connected?
No
Is there continiuty
between the
terminals?
No
Is the pellet
delivery hose
air tight at both
ends?
Note 3
Yes
Is the ash pan
overflowing?
Is there a build
up of ash on the
combustion
chamber baffle?
Note 4
No
Is the
combustion
chamber
draught
correct?
No Is the condensate No
trap and/or
discharge pipe
blocked or
frozen?
Note 5
Note 6
Is the flue used Yes
the correct type?
Is it correctly
installed & not
blocked?
Note 7
Is the flue fan
(in flue fan box)
operational &
clean?
Note 8
No
No
No
No
No
No
No
Replace pellet
delivery hose
Correctly fit
pellet delivery
hose or replace
if necessary
Clean out the ash
pan & boiler.
Clean all ash from
the combustion
chamber baffle
Check the
switched live
supply to hopper/
boiler and rectify
as necessary
Clean condensate
trap & pipe to
clear blockage
Rectify or replace
flue if necessary.
Remove any flue
blockage
Rectify fan fault
or replace if
necessary.
Clean fan if
required
Note 2
No
Replace pellet
tube stat
Note 9
Is the shaker
Yes Is the mains water Yes Is the boiler wash Yes
Yes
supply to boiler
system operating
cleaning system
connected &
correctly when
operating correctly
switched on?
tested (using the
when tested (using
test switch)?
the test switch)?
Note 10
Note 10
Note 6
Is the boiler
cleaning interval
correctly set?
Note 11
Yes
Is the duration
of the boiler
cleaning period
correctly set?
Note 11
No
No
No
No
No
No
Unblock or
increase
ventilation as
required
Connect the
mains water
supply &
switch on
Is solenoid
valve operating
correctly?
Check operation
of cleaning motor
& shaker
mechanism
In burner menu
reset ‘TIME
CLEAN BRAZIER’
& ‘TIME CLEAN
BOILER’ settings
In burner menu
reset ‘TIME CLEAN
PERIOD’ setting
Yes
Check that
manifold jets are
clear & correctly
set?
Fault Finding
Is the room
ventilation
adequate?
65
12 Fault Finding
12.5 Pellet Tube Thermostat
Note 1 - Is the fault cleared by
pressing the reset button?
Note 5 - Is combustion chamber
draught correct?
Note 8 - Is flue fan operational and
clean?
Is the pellet feed tube less than 60°C?
If not then allow it to cool before
proceeding.
Check combustion chamber draught.
Refer to Section 10.9 for procedure.
If it is incorrect, BEFORE making any
adjustment to the draught stabiliser,
carry out the following checks as per
the flow chart:
If the flue fan is not running, or is
coated with ash, the draught in the
combustion will be reduced causing the
combustion gases from the burner to
back-up through the burner into the
pellet feed tube. This will activate the
pellet feed tube (burn back) thermostat.
When cool, remove the steel retaining
clip and disconnect the lead from the
pellet feed tube (burn back) thermostat.
Press the reset button on the
thermostat.
Note 2 - Is feed pipe thermostat
(burn back sensor) damaged or
faulty?
Check the electrical continuity and
condition of the thermostat. Replace if
necessary.
Note 3 - Is the pellet delivery hose
damaged/correctly fitted?
Check the condition of the hose. Is it
damaged? If so replace it.
Is it fitted correctly at both ends – with
an air tight fit onto both pellet feed pipe
and pellet auger outlet? Rectify as
necessary.
A damaged (or incorrectly fitted)
pellet delivery hose can allow a back
draught through the boiler, resulting
in the pellet tube (burn back)
thermostat operating and shutting
down the burner.
Fault Finding
Note 4 - Is the ash pan overflowing?
66
An overflowing ash pan, and ash buildup on the baffle, can block the passage
of the combustion gases from the
burner, causing them to back-up
through the burner into the pellet feed
tube. This will activate the pellet feed
tube (burn back) thermostat.
The ash pan must be periodically
emptied, and also any ash build-up on
the baffle removed, by the user at
MONTHLY intervals for the FIRST
THREE MONTHS. After this the ash
pan should be emptied, and ash on the
baffle removed, regularly, on at least a
monthly basis, or as indicated by the
amount of ash found during the first
three months cleaning. Refer to Section
1.5.
•
Is condensate trap or pipework
blocked or frozen? Defrost/remove
blockage as necessary.
•
Is ash pan overflowing? Empty and
clean ash pan as necessary.
•
Is the flue system incorrectly
installed or blocked? Rectify as
necessary.
•
Is the flue fan operational?
•
Is the room ventilation adequate?
If all the above are OK, then adjust the
draught stabiliser as necessary to
achieve the required combustion
chamber draught. Refer to Section 10.9
for procedure.
Note 6 - Is condensate trap/pipe
blocked?
Thoroughly check the entire
condensate disposal system, including
all the pipework and the trap(s), to
ensure that it is not blocked or frozen
(even partially).
If the condensate backs-up into the
condensing heat exchanger, it can
block the passage of the combustion
gases from the burner, causing them to
back-up through the boiler and burner
into the pellet feed tube. This will
activate the pellet feed tube (burn back)
thermostat.
Note 7 - Is the flue correct type and
correctly installed?
Only the Grant Black flue system can
be used with the Grant Spira wood
pellet boilers. Check that the flue has
been correctly assembled and that the
terminal position complies with the
requirements of The Building
Regulations – Approved Document J.
Refer to Sections 7.2 for guidance.
Note 9 - Is the room ventilation
adequate?
Check that sufficient permanent
ventilation is present in the room
containing the boiler(s). Refer to Section
7.1 for guidance.
Lack of ventilation will lead to
incomplete combustion, and an
increased temperature in the pellet feed
tube that will activate the burn back
thermostat.
Note 10 - Is the wash system
operating correctly?
Check the water supply to the wash
system is connected and turned on.
Operate the CLEANING switch and
check the solenoid valve is opening and
the water jets are all clear and spraying
into heat exchanger tubes. Refer to
Section 10.3.3.
If necessary remove, clean and refit the
wash system manifold. Refer to Section
11.6.2.
In hard water areas an anti-scale device
should be fitted on the cold water
supply to the wash system to prevent
scale build-up in the manifold and jets.
Note 11 - Is the boiler cleaning
period correct?
Go to the ‘CLEAN’ sub menu of the
burner control settings and check that
both ‘TIME CLEAN PERIOD’ and
‘TIME CLEAN BOILER’ are correctly
set. If not, re-set to the correct value.
Refer to 9.7.1.3.
12.6 Failed Pellet Lighting
H2o 60˚C
SET 75˚C
FAILED PEL
Primary Fault
Secondary follow on checks
FAILED PELLET LIGHTING
Note 1
Is the pellet
auger fully
primed?
Yes Are pellets being Yes
delivered to the
burner?
Are there
unburnt pellets
in the brazier?
Note 2
Fill hopper with
correct grade of
pellets
Note 3
No
No
Fully prime pellet
auger
Is the auger
operating?
No
No
Yes
Note 8
No
Does the Yes
Is the
Yes Is photocell Yes
ignition
ignition
operational?
element on
element
Check that
period
operational?
photocell
exceed 360
& tube are
seconds?
clear
No
Contact
GRANT for
assistance
Note 5
No
Replace
element if
faulty
No
Replace
photocell if
faulty
Yes
Is hopper outlet
blocked or full of
dust?
Is the ignition
element
operational?
No
Note 5
Is pre-load
quantity of
pellets
correct?
Is the burner
cleaning interval
correctly set?
Yes
Note 6
Is the pellet
pre-load time
correctly set?
Yes
Note 7
No
No
No
No
Is the correct
grade of pellets
being used?
Check power to
element. Check is
element OK?
In burner menu
reset ‘TIME
CLEAN BRAZIER’
& ‘TIME CLEAN
BOILER’ settings
Contact GRANT
for advise to
reset pellet
pre-load time
Empty hopper &
refill with correct
grade pellets
Replace element
if faulty
Yes
Check auger
motor power &
coupling
Is the required
lux level being
detected by
photocell?
Is there clinker
in the brazier?
Yes
No
Clean out hopper
& re-prime auger
Is the flame
Yes
stabilisation time
(45) correct?
Is the required Yes
lux level being
detected by
photocell in
‘LIGHTING CYCLE
REDUCED’ (42)?
Note 10
Note 11
Is the
‘TIME LOAD
LIGHTING’ time
4 seconds?
Note 12
Yes
Is the
‘TIME PAUSE
LIGHTING’ time
15 seconds?
Note 12
Yes
Is the
‘TIME LIGHTING
CYCLE REDUCED’
time 120 seconds?
Note 12
No
No
No
No
No
Contact
GRANT for
assistance
In burner menu
reset ‘TIME
CLEAN BRAZIER’
& ‘TIME CLEAN
BOILER’ settings
Contact
GRANT for
assistance
Contact
GRANT for
assistance
Contact
GRANT for
assistance
Note 9
No
Contact
GRANT for
assistance
to set
pre-load
Fault Finding
Is there a
Yes
sufficient quantity
of pellets in
the hopper?
67
12 Fault Finding
12.6 Failed Pellet Lighting
Note 1 - Is there a sufficient quantity
of pellets in the pellet hopper?
Note 4 - Are the correct pellets being
used?
Note 8 - Is the required LUX level
being detected by the photocell?
The effect of insufficient pellets will
depend on the type of pellet storage
used, as follows:
Check the pellets being used. Only EN
Plus Grade A1 pellets conforming to
EN14961 must be used with the Grant
Spira boilers. Refer to Section 3.1 for
details pellet specification.
In the ‘WAIT LIGHTING (IGNITION)’
period of the burner lighting sequence
(i.e. whilst the ‘STEP AUTO’ function is
41 in the ‘view’ menu), if the LUX value
fails to reach 2 after a time of 360
seconds, then the error message
‘FAILED PELLET LIGHTING’ is
displayed. Refer to Section 9.7.3 for
procedure to access LUX value in
‘View’ menu.
Using a pellet hopper only – if there are
insufficient pellets, the hopper contents
switch will break the switched live to
the boiler, causing ‘WAIT BOILER
THERMOSTAT’ to be displayed. Refill
the hopper to start the boiler. Refer to
Section 1.4.4 for further details.
Using a bulk pellet store – the hopper
contents switch will control the
operation of either the bulk store auger
of Grant Spira-vac system. It will NOT
interrupt the switched live to the boiler
and thus ‘WAIT BOILER
THERMOSTAT’ will NOT be displayed.
The boiler would continue to operate
until ALL pellets in the hopper are used
and then stop, with ‘FAILED PELLET
LIGHTING’ displayed on the burner
control screen.
In this case, check that:
•
there are pellets in the bulk store
•
the bulk store auger, or Grant Spiravac system, is operating correctly
(refer to instructions supplied with
the Spira-vac system).
Rectify as necessary.
Note 2 - Is the pellet auger fully
primed?
Refer to Section 10.7 for procedure to
prime the auger.
Note 3 - Is there ‘clinker’ in the
burner brazier?
Fault Finding
Clinker is the hard deposits of solidified
ash, containing sand particles, which
the automatic burner cleaning system is
unable to remove. Clinker is caused by
using unsuitable pellets. See note 4.
68
If there is no clinker, but brazier is full of
unburnt pellets, remove all pellets and
clean brazier.
Check the brazier cleaning setting –
‘TIME CLEAN BRAZIER’. Refer to
Section 9.7.1.3 for settings.
Note 5 - Is the ignition element
operational?
To check, isolate electrical supply and
disconnect the two leads from the
element cable. Grasp the black
grommet and pull the complete element
and cable from the tube. Check the
condition of the ceramic element and
that it is correctly fitted into the ceramic
socket. Also check it is correctly
positioned inside the tube. Refer to
Section 10.8.3 for details.
Check across the two terminals for
electrical continuity. Resistance of
element ≈89Ω. If no continuity is found,
then replace the element.
Note 6 - Is the burner cleaning
interval correct?
Go to the ‘CLEAN’ sub menu of the
burner control settings and check that
‘TIME CLEAN BRAZIER’ and ‘TIME
CLEAN BOILER’ are correctly set.
Refer to 9.7.1.3.
Note 7 - Is the pellet pre-load time
correct?
Measure the duration of the pellet preload period (i.e. whilst the ‘STEP
AUTO’ function is 40 in the ‘VIEW’
menu), at the beginning of the burner
lighting sequence. Refer to Section 9.3
for burner operating sequence and also
Section 9.7.3 for ‘VIEW’ menu folder.
Pre-load should be 65 seconds. If not,
contact Grant UK for technical advice
on how to adjust the pre-load period.
Note 9 - Is the preload quantity of
pellets correct?
When the pre-load operation is
complete, the pellets should cover the
heating element but not cover the
opening at the end of the photocell
tube.
Note 10 - Is the flame stabilization
period correct?
The ‘FLAME STABILISATION’ period
(i.e. ‘step auto’ function 45 in the
‘VIEW’ menu) is an over-run of the
ignition element on period AFTER the 2
lux has been detected. This is factory
set at 30 seconds.
Note 11 - Is the required LUX level
being detected by the photocell?
In the ‘LIGHTING CYCLE REDUCED’
period of the burner lighting sequence
(i.e. whilst the ‘STEP AUTO’ function is
42 in the ‘view’ menu), if the flame
drops below 1 lux then the error
message ‘FAILED PELLET LIGHTING’
is displayed. Refer to Section 9.7.3 for
procedure to access LUX value in
‘View’ menu.
Note 12 - TO BE CONFIRMED
???
12.7 Servo Motor Blocked
H2o 60˚C
SET 75˚C
SERVO MO
Primary Fault
Secondary follow on checks
SERVO MOTOR BLOCKED
Note 1
Yes
Remove the
blockage & close
the Combustion
chamber door
No
Can the brazier
be opened
manually?
Yes
Note 2
Is the brazier
Yes
clearance correctly
set?
Note 3
Is the servo
motor operating
correctly?
Note 4
Yes
Is the boiler
cleaning interval
correctly set?
Note 5
No
Is the duration
of the brazier
cleaning period
correct (4 to 5
mins in total)?
Note 6
No
No
No
No
No
Is the brazier
distorted or
damaged?
Reset brazier
clearance using
Grant brazier
clearance guage
Is the servo
motor correctly
set?
In burner menu
reset ‘TIME
CLEAN BRAZIER’
& ‘TIME CLEAN
BOILER’ settings
Adjust servo
motor setting or
replace servo
motor if
necessary
Yes
No
Replace damaged
parts & reset
brazier clearance
Reset servo
motor controls
Note 1 - Opening the combustion
chamber door.
Note 4 - Is the servo motor operating
correctly?
Before attempting to open the
combustion chamber door, set the
ON/STANDBY switch to STANDBY.
Set the ON/STANDBY switch to
STANDBY. Go to the ‘CLEAN’ sub
menu of the burner control settings and
set ‘TIME CLEAN BRAZIER’ to 0.
Note 2 - Can the brazier be opened
manually?
First clear any blockage (clinker/ash)
from the brazier. To open the brazier
manually, operate the release switch on
the servo motor. Refer to Section
11.7.2.
DO NOT FORCE THE BRAZIER
OPEN WITHOUT OPERATING THE
SERVO MOTOR RELEASE SWITCH
OR THE SERVO MOTOR GEARS
WILL BE DAMAGED AS A RESULT!
Note 3 - Is the brazier clearance
correctly set?
To check the gap between the fixed
and moving part of the brazier, use the
brazier clearance gauge (supplied with
the boiler). Refer to Section 11.7.2. If it
is necessary to dismantle the brazier,
the burner must be removed from the
combustion chamber door. Refer to
Section 11.7.
Set the ON/STANDBY switch to ON
and start the boiler. When the burner
display shows ’100% POWER’ set the
ON/STANDBY switch back to
STANDBY. When the burner has
completed the shut down process the
brazier cleaning operation will start
automatically. The burner control screen
will first show ‘BRAZIER CLEANING
FORWARD’ for between 2 to 2½
minutes. Then the burner fan will start
and the screen will show ‘BRAZIER
CLEANING BACK’ for between a
further 2 to 2½ minutes. Thus the total
time for the brazier cleaning operation is
between 4 to 5 minutes.
Ensure ‘TIME CLEAN BRAZIER’ is
then reset to its original setting or
the brazier cleaning operation will be
repeated every time the burner shuts
down.
Note 5 - Is the servo motor correctly
set?
The stroke of the servo motor is factory
set and should not be adjusted. Check
with Grant UK for correct setting.
Note 6 - Is the boiler cleaning
interval correct?
Go to the ‘CLEAN’ sub menu of the
burner control settings and check that
‘TIME CLEAN BRAZIER’ and ‘TIME
CLEAN BOILER’ are correctly set.
Refer to 9.7.1.3
Fault Finding
Open the
combustion
chamber door.
Is the brazier
blocked up?
69
12 Fault Finding
12.8 Probe Fault
H2o 60˚C
SET 75˚C
PROBE FAI
Primary Fault
Secondary follow on checks
PROBE FAULT
Are all three
burner plugs
correctly fitted?
Note 1
NO
Correctly fit
plugs – push
fully into sockets
Yes
Is the heating
thermistor
damaged?
Note 2
No
Is thermistor
connected to
control PCB?
Yes
Replace
thermistor
Note 3
YES
No
Replace
thermistor
Check thermistor
connections
from burner
plug/socket to
control PCB
Notes 1 - Are burner plugs correctly
fitted?
Note 2 - Is heating thermistor
damaged?
Note 3 - Is thermistor connected to
burner PCB?
Check that all three plugs are fully
pushed into sockets on the left side of
the burner – in particular plug No.2.
Refer to Section 8 and Figure 8-5.
Isolate electrical supply to boiler and
remove boiler control panel cover.
Check the condition of the thermistor
for any damage and replace if
necessary.
With electrical supply to boiler still
isolated, remove both the burner cover
and PCB cover. Check the thermistor
connections to the PCB – from
terminals S3 and B4 on plug/socket
No.2. Refer to Section 8 and Figure 8-6.
Fault Finding
Check that the heating thermistor is
correctly fitted into the pocket (inside
the boiler control panel). Refer to
Section 10.3.1. Ensure that both
thermistor and thermostat sensor are
held in place with the retaining clip
supplied.
70
If fault still exists, replace thermistor.
12.9 Air Pressure Error
H2o 60˚C
SET 80˚C
AIR PRESS
Primary Fault
Secondary follow on checks
AIR PRESSURE ERROR
Reset error
Restart the
No
Yes
by pressing the
boiler does the
‘RESET’ button
fault occur during
on burner control
the lighting
panel
sequence?
Note 1
Is the burner fan
operational?
Note 2
No
Yes
Is the fan
blocked?
Note 3
No
Is air
pressure switch
operational?
Is the burner
fan pressure
correct?
Yes
Note 4
Note 5
No
Yes
No
No
Check plug
connections
between the
burner fan &
control PCB
Remove any
blockage or replace
fan if necessary
Is fan air pressure
tube OK?
Replace burner
fan. Is burner
fan pressure
now correct?
Yes
No
Replace
control PCB
Check operation
of pressure
switch
Note 1 - Does fault occur during
lighting sequence?
During the ‘PRE-LOAD’ operation, the
burner controls check that burner fan is
generating enough air pressure to close
the air pressure switch. If the pressure
switch is not closed during pre-load,
then the warning ‘AIR PRESSURE
ERROR’ is displayed on the burner
screen.
Note 2 - Is the burner fan
operational?
that the burner fan speed is correct. It
does not check if the fan is generating
enough air pressure. If during the
’PELLET BURNER FIRING’ operation
the burner fan speed is not correct then
the warning ‘AIR PRESSURE ERROR’
is displayed on the burner screen.
Check that the fan inlet is not blocked
and that the fan blades are free to
rotate. If necessary, thoroughly clean
and remove any dust or debris. If fan
still does not rotate freely, replace fan.
During the ’PELLET BURNER FIRING’
operation the burner controls checks
Note 3 - Is the air pressure switch
operational?
Check that air supply tube is correctly
connected to the pressure switch and
not blocked or twisted. Refer to Figure
12-6. Rectify as necessary. Check
condition of tube and replace if
damaged. Check operation of air
pressure switch.
Note 4 - Is fan air pressure tube OK?
Check that the plastic tube from the fan
is not twisted, kinked or blocked.
Check that it is correctly connected to
the both the fan and pressure switch
(lower of the two connections on the
pressure switch).
Using a digital manometer (set for
positive pressure) check the pressure
generated by the burner fan is the
minimum of 0.8mbar required to
activate the air pressure switch. Refer
to Figure 12-7. If fan pressure is
incorrect, replace fan.
Figure 12-6: Air pressure switch & fan
Figure 12-7: Checking air pressure
from fan
If correct pressure is still not achieved,
replace burner PCB.
Fault Finding
Note 5 - Is burner fan pressure
correct?
71
13 Spare Parts
13.1 Burner
Spare Parts
Figure 13-1: Burner Control Components – Exploded View
72
Figure 13-2: Burner Brazier Components – Exploded View
Spare Parts
13.2 Burner Brazier
73
13 Spare Parts
13.3 Burner Parts List
Spare Parts
Item
74
Description
Part No.
Quantity 6-26
Quantity 9-36
1
1
Pressure switch
WP111
1
2a
Primary printed circuit board 6-26
WP112A
1
-
2b
Primary printed circuit board 9-36
WP112B
-
1
3
Burner fan
WP03
1
1
4
Servomotor
WP04
1
1
5
LED display unit c/w enclosure
WP05
1
1
6
Mounting bracket set (LED display)
WP06
1
1
7
Electrical connector 7 way female
WP07
1
1
8
Electrical connector 7 way male
WP08
1
1
9
Photocell
WP09
1
1
10
Ignition element
WP10
1
1
11
Pellet feed tube thermostat
WP11
1
1
12
Pellet feed tube thermostat cover
WP12
1
1
13
Pellet feed tube
WP13
1
1
14
Pellet feed tube gasket
WP14
1
1
15
Burner mounting gasket
WP15
1
1
16
Ignition element housing
WP16
1
1
17
Photocell tube
WP17
1
1
18
Electrical connector 6 way male
WP18
1
1
19
Brazier chassis
WP19
1
1
20
M6 washer
WP20
8
8
21
M6 nut
WP21
8
8
22
Ignition element mounting plate
WP22
1
1
23
Photocell back plate
WP23
1
1
24
Burner fan gasket
WP24
1
1
25
Boiler water thermistor
WP25
1
1
26
Controls chassis left gable
WP26
1
1
27
Controls chassis back-plate & base
WP27
1
1
28
Main burner cover
WP28
1
1
29a
Flame hood 6-26
WP29A
1
-
29b
Flame hood 9-36
WP29B
-
1
30
Brazier flame plate set
WP130
1
1
31
M6 x 15 Coach bolt
WP31
8
8
32a
Grate enclosure (6-26)
WP32A
1
-
32b
Grate enclosure (9-36)
WP32B
-
1
33a
Brazier base assembly 6-26
WP33A
1
-
33b
Brazier base assembly 9-36
WP33B
-
1
Figure 13-3: Boiler Components – Exploded View
Spare Parts
13.4 Boiler
75
13 Spare Parts
13.5 Boiler Parts List
Spare Parts
Item
76
Description
Part No.
Quantity 6-26
Quantity 9-36
1
1
Rear lower panel
WP34
1
2
5 way mains connection –male fixed
WP 35
1
1
3
Rear upper panel
WP36
1
1
4
5 way mains connection –female detachable
WP37
1
1
5
5 way flue fan / cleaning solenoid connection –male detachable
WP38
1
6
5 way flue fan /cleaning solenoid connection – female fixed WP39
1
1
7
Flue fan sealing gasket
WP40
1
1
8
Fan box
WP41
1
1
9
Cleaning door sealing gasket – Secondary 6-26
Cleaning door sealing gasket – Secondary 9-26
WP42
WP43
1
-
1
10
Cleaning door –secondary 6-26
Cleaning door –secondary 9-26
WP44
WP145
1
-
1
11
Flue fan
WP46
1
1
12
Air vent
MPCBS29
1
1
13
Air vent manifold
WP48
1
1
14
22mm Secondary to primary pipe 6-26
22mm Secondary to primary pipe 9-36
WP49
WP50
1
-
1
15
Return assembly 6-26
Return assembly 9-36
WP51
WP52
1
-
1
16
1" BSP Flow pipe 6-26
1 ¼" BSP Flow pipe 9-36
WP53
WP54
1
-
1
17
Draught Stabilizer
WP55
1
1
18
Fan box/secondary gasket
WP56
1
1
19
Secondary heat-exchanger spiral baffle
WP57
30
40
20
Cleaning door sealing gasket – Primary 6-26
Cleaning door sealing gasket – Primary 9-36
WP58
WP59
1
-
1
21
Secondary heat-exchanger 6-26
Secondary heat-exchanger 9-36
WP60
WP61
1
-
1
22
Shaker arm assembly 6-26
Shaker arm assembly 9-36
WP62
WP63
1
-
1
23
Spring anchor -fixed
WP64
1
1
24
Shaker chamber 6-26
Shaker chamber 9-36
WP65
WP66
1
-
1
25
Primary/secondary gasket
WP67
1
1
26
Top panel 6-26
Top panel 9-36
WP68
WP69
1
-
1
27
Cleaning pipe manifold 6-26
Cleaning pipe manifold 9-36
WP70
WP71
1
-
1
28
Cleaning door-shaker chamber 6-26
Cleaning door-shaker chamber 9-36
WP72
WP73
1
-
1
29
Fibre rope -shaker chamber door 6-26
Fibre rope -shaker chamber door 9-36
WP74
WP75
1
-
1
30
Solenoid valve
WP76
1
1
31
Secondary heat-exchanger spiral baffle
WP77
18
24
1
13.5 Boiler Parts List continued
Item
Description
Part No.
Quantity 6-26
Quantity 9-36
WP78
WP79
1
-
1
32
Spiral hanger 6-26
Spiral hanger 9-36
33
Shaker assembly mounting flange
WP80
1
1
34
Spring anchor - movable
WP81
1
1
35
Cleaning mechanism spring
WP82
1
1
36
Right side panel 6-26
Right side panel 9-36
WP83
WP84
1
-
1
37
Cleaning mechanism cam
WP85
1
1
38
Cleaning motor mounting flange
WP86
1
1
39
Cleaning mechanism motor
WP87
1
1
40
Door interlock
WP88
1
1
41
Shaker chamber mounting gasket 6-26
Shaker chamber mounting gasket 9-36
WP89
WP90
1
-
1
42
Left side panel 6-26
WP91
1
-
Left side panel 9-36
WP92
-
1
43
Brass fitting 1" BSP x 22mm 311
Brass fitting 1 1/4" BSP x 28mm 311
WP93
WP94
1
-
1
44
Primary heat-exchanger 6-26
Primary heat-exchanger 9-36
WP95
WP96
1
-
1
45
Combustion chamber baffle 6-26
Combustion chamber baffle 9-36
WP97
WP98
1
-
1
46
Ash pan handles
WP99
2
2
47
Ash pan 6-26
Ash pan 9-36
WP100
WP101
1
-
1
48
Combustion chamber cleaning door rope
WP102
1
1
49
Combustion chamber cleaning door
WP103
1
1
50
Combustion chamber cleaning door panel
WP104
1
1
51
Front panel
WP105
1
1
52
Combustion chamber cleaning door handle
WP106
1
1
53
On/Off switch
EFBS22
1
1
54
Limit stat’
WP107
1
1
55
Momentary switch (double pole on/on)
WP108
1
1
56
Control panel chassis
WP109
1
1
57
Relay
MPCBS72X
1
1
58
Control panel cover
WP110
1
1
59
Plug (not show)
60
Plug (not shown)
Spare Parts
Items not indexed are specific to the 9-36 model.
77
13 Spare Parts
Spare Parts
13.6 Pellet Hopper (110kg)
78
Figure 13-4: 110kg Pellet Hopper Components - Exploded View
Item
Description
Part No.
Quantity 6-26 & 9-36
2
1
Castor Wheel (c/w brake)
WP146
2
Caster wheel flange
WP147
4
3
Right side panel
WP148
1
4
Pellet feed Auger shield
WP149
1
5
Base
WP150
1
6
Front panel
WP151
1
7
Grid
WP152
1
8
Top front panel
WP153
1
9
Door hinge
WP154
2
10
Top rear panel
WP155
1
11
Left side panel
WP156
1
12
Castor Wheel
WP157
2
13
Rubber diaphragm flange
WP158
1
14
Rubber diaphragm
WP159
1
15
Wiring centre
WP160
1
16
Pellet damper
WP161
1
17
Rear panel
WP162
1
18
Wiring centre access cover
WP163
1
19
Low level limit switch
WP164
1
20
Limit switch bracket
WP165
1
Spare Parts
13.7 Pellet Hopper (110kg) Parts List
79
14 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;
14.1 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.
Health and Safety
Information
Skin; If irritation occurs, wash under
running water before washing with soap
and water.
80
Inhalation; Remove to fresh air, drink
water to clear throat and blow nose to
remove dust/fibres.
Ingestion; Drink plenty of water.
14.2 Sealant and Adhesive
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. See immediate medical
attention.
Skin; Wipe off and wash with soap and
water.
Inhalation; Remove to fresh air.
15 EC Declaration of Conformity
(In accordance with BS EN ISO/IEC 17050-1:2004)
We:
Of:
GRANT ENGINEERING (IRL) LTD.
Crinkle
Birr
Co. Offaly
Ireland
Telephone: 057 9120089
Fax:
057 9121060
Email:
[email protected]
Website: www.grantengineering.ie
Declare that:
Equipment:
Floor Standing Domestic Condensing Wood pellet boiler
Model name/number:
Grant Spira 6-26 Wood Pellet Boiler
Grant Spira 9-36 Wood Pellet Boiler
In accordance with the following Directives:
2006/95/EC
Conforms with the safety objectives of the Low Voltage Directive and its amending directives
2004/108/EC
Conforms with the essential protection requirements of the Electromagnetic Compatibility Directive and
its amending directives
has been designed and manufactured to the following specifications:
EN60335-1: 2002 + A1:2004 + A11:2004 + A2:2006 + A12:2006 + A13:2008 +A14:2010 (Clause 19.11.4 requirements)
EN 55014 -1: 2006 +A1:2009.
EC Declaration of
Conformity
EN 303-5:1999
81
16 Warranty
The Spira Wood Pellet Boiler
Warranty
Dear Customer,
You are now the proud owner of a
Grant Spira Wood Pellet Boiler from
Grant Engineering (UK) Ltd, which has
been designed to give years of reliable,
trouble free operation.
Grant Engineering (UK) Ltd. guarantees
the manufacture of the boiler including
all electrical and mechanical
components for a period of twelve
months from the date installation,
unless the installation was more than
six months from the date of purchase,
in which case the warranty period will
commence six months from the date of
purchase, provided the boiler is
installed in full accordance with the
installation instructions provided.
This will be extended to a period of two
years if the boiler is registered with
Grant UK within thirty days of
installation and it is serviced at twelve
month intervals. See Main Terms and
Conditions below.
Warranty
IMPORTANT
Please register your Grant Spira Wood
Pellet boiler with Grant UK within thirty
days of installation. To do so visit
www.grantuk.com and follow the links
to the ‘Householder Zone’, where you
can register your boiler for a further one
year warranty (giving two years from
the date of purchase). This does not
affect your statutory rights*.
82
Breakdown during the
Manufacturer’s Warranty
If your Grant boiler should fail within the
warranty period, you must contact
Grant Engineering (UK) Ltd, who will
arrange for the repair under the terms
of their warranty, providing that the
boiler has been correctly installed,
commissioned and serviced (if the
appliance has been installed for more
than twelve months) by a competent
person and the fault is not due to
tampering, running out of fuel, the use
of unapproved wood pellets,
contamination, system water
contamination, misuse, or the failure of
any external components not supplied
by Grant UK (e.g. motorised valve,
etc.). This extended two year warranty
only applies if the boiler is registered
with Grant UK within thirty days of
installation.
In the first Instance:
Contact your installer or commissioning
engineer to ensure that the fault does
not lie with the system or any other
components, or any incorrect setting of
the system controls that falls outside
the manufacturer’s warranty otherwise a
service charge could result.
•
Damage due to external causes
such as bad weather conditions
(flood, storms, lightening, frost,
snow, ice), fire, explosion, accident
or theft.
•
Faults due to incorrectly sized
expansion vessel(s) or incorrect
vessel charge pressure.
If a fault covered by the manufacturer’s
warranty is found:
•
Faults caused by external electrics
and external components.
Ask your installer to contact Grant
Engineering (UK) Ltd Service
Department on 01380 736920 who will
arrange for a qualified service engineer
to attend to the fault.
•
Problems caused by lack of pellets,
the use of unapproved pellets or
faults with the pellet storage and
supply system (if not supplied by
Grant UK).
•
Removing any pellet store or
hopper contamination or blockages
in the pellet augers, pellet hopper or
bulk pellet store.
•
Problems due to the flue system
being incorrectly fitted or not
installed to meet installation
requirements.
•
Boiler servicing, de-scaling or
flushing.
•
Cleaning condensate
traps/pipework or thawing frozen
condensate pipework.
•
Electrival cables and plugs, heating
system controls not supplied by
Grant UK.
•
Heating system components, such
as radiators, pipes, fittings, pumps
and valves not supplied by Grant
UK.
•
Consumable items including, but
not limited to, gaskets, seals, etc.
Free of Charge Repairs:
During the first two years no charge for
parts or labour will be made provided
that the boiler has been installed and
commissioned correctly in accordance
with the manufacturer’s instructions, it
was registered with Grant UK within
thirty days of installation and, for boilers
over twelve months old, details of
annual maintenance is available.
The following documents must be
made available to Grant UK on request:
• Proof of purchase
• Grant Commissioning report form
• Service documents
Chargeable Repairs:
A charge may be made (if necessary
following testing of parts at Grant UK) if
the cause of the breakdown is due to
any faults caused by the plumbing or
heating system, e.g. contamination of
parts due to system contamination,
sludge, scale, debris or trapped air. See
Extent of Manufacturer’s Warranty
below.
Extent of Manufacturer’s Warranty:
The Manufacturer’s Warranty does not
cover the following:
•
If the boiler has been installed over
two years.
•
If the boiler has not been
commissioned, or serviced by a
competent person in accordance
with the installation and servicing
manual.
•
Faults due to tampering,
unauthorised adjustment, neglect,
misuse or operating the boiler
contrary to the manufacturer’s User
Instructions.
Remember - before you contact
Grant:
Ensure the boiler has been
commissioned and serviced by a
competent persion in accordance with
the Installation and servicing manual.
Ensure there is an adequate quantity of
the approved type of pellets in the
hopper (and bulk store if fitted) to
supply the burner.
Ensure the problem is not being caused
by the heating system or its controls.
Consult the User Instructions supplied
with the boiler for guidance.
NOTE
Do not wait until your wood pellet
supply runs out before you order some
more.
Dust in the bottom of the pellet store or
hopper may prevent the supply of
pellets to the burner. It is important that
this is checked for and, if dust is
present, removed on an annual service
to prevent nuisance stoppage of the
boiler.
Terms of Manufacturer’s Guarantee
1. The Company shall mean Grant
Engineering (UK) Limited.
2. The boiler is guaranteed for two
years from the date of purchase
providing that after twelve months
the annual service has been
completed and the boiler registered
with the Company within thirty days
of the installation date. Any work
undertaken must be authorised by
the Company and carried out by an
approved service agent.
3. The shell (heat exchanger) of the
pellet boiler supplied by the
Company is covered by a five year
parts only guarantee from the date
of purchase subject to correct
operation of the boiler. Proof of
annual maintenance must be
provided.
4. This guarantee does not cover
breakdowns caused by incorrect
installation, neglect, misuse,
accident or failure to operate the
boiler in accordance with the
manufacturer’s instructions.
8. This guarantee applies to Grant
boilers installed on the UK
mainland, Isle of Man and Channel
Islands only. Provision of in-warranty
cover elsewhere in the UK is
subject to agreement with the
Company.
9. All claims under this guarantee
must be made to the Company
prior to any work being undertaken.
Invoices for call out/repair work by
any third party will not be accepted
unless previously authorised by the
Company.
10. Proof of purchase and date of
installation, commissioning and
service documents must be
provided on request.
11. If a replacement boiler is supplied
under the warranty (due to a
manufacturing fault) the product
warranty continues from the
installation date of the original boiler,
and not from the installation date of
the replacement.
Hard Water Advice
If you live in a hard water area,
protection against scaling of the wash
system manifold in your boiler must be
provided. You should fit an appropriate
scale inhibitor or water softener as any
breakdown caused by water scaling is
not covered by either the manufacturer’s
warranty. Ask your installer for advice.
5. The boiler is registered with the
Company within thirty days of
installation. Failure to do so does
not affect your statutory rights.
7. The Company will endeavour to
provide prompt service in the
unlikely event of a problem
occurring, but cannot be held
responsible for any consequences
of delay however caused.
Warranty
6. This guarantee is not transferable
unless sanctioned by the Company.
83
GRANT ENGINEERING (UK) LTD
Hopton House, Hopton Industrial Estate, Devizes, Wiltshire. SN10 2EU
Telephone: 01380 736920 Fax: 01380 736991
Email: [email protected] Website: www.grantuk.com
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