Grant spira User Instructions
Part No. DOC45 Rev00 - October 2014
Grant Spira 6-26kW and 9-36kW
Condensing Wood Pellet Boiler
User Instructions
2
Contents
1 Introduction 3
2 About your Boiler 3
2.1 General 3
2.2 Pellet Hoppers 3
2.3 Bulk Pellet Stores 3
2.4 Boiler Operation 3
2.5 Cleaning 4
3 About your Fuel 4
4 Boiler Controls 5
4.1 Boiler Control Panel 5
5 Burner Control Panel 6
5.1 Burner Control Panel 6
5.2 Error Messages 7
5.3 Service Indicator 7
5.4 Active Symbols 7
6 Pellet Feed Thermostat 8
7 Priming the Auger 8
8 Lighting the Boiler 9
9 If you Boiler Fails to Light 10
10 Emptying the Ash Pan 12
11 Cleaning and Servicing 14
your Boiler
12 Ventilation 14
13 Electricity Supply 14
14 Sealed Central Heating system 14
15 Frost Protection 14
16 Corrosion and Protection 14
17 Service Log 15
This appliance can be used by children aged from 8 years and above and persons with reduced
physical, sensory or mental capabilities or lack of experience and knowledge if they have been given
supervision or instruction concerning use of the appliance in a safe way and understand the hazards
involved. Children shall not play with the appliance. Cleaning and user maintenance shall not be
made by children without supervision.
3
1 Introduction
This guide is intended to assist and instruct
the user in the operation of the Grant Spira
Condensing Wood Pellet Boiler.
A separate manual is available to the
installer for the installation, servicing and
commissioning of the boiler.
The following special text formats are used in
this manual for the purposes listed below:
WARNING
Warning of possible human injury as a
consequence of not following the instructions
in the ‘Warning’.
CAUTION
Caution concerning likely damage to
equipment or tools as a consequence of not
following the instructions in the ‘Caution’.
NOTE
Note text. Used for emphasis or information
not directly concerned with the surrounding
text but of importance to the reader.
2 About your
Boiler
2.1 General
Your Grant Spira wood pellet boiler should
only be installed, commissioned and
serviced by a Grant Accredited Installer who
has undergone specific product training by
Grant Engineering (UK) Ltd.
If you have a Grant Spira 6-26 or 9-36, your
boiler basically consists of two parts:
• The boiler itself, with the burner mounted
on the front
• The pellet hopper, with the pellet feed
auger protruding from the front of the
hopper casing
The hopper may be either a 110kg or 200kg
capacity unit and will be located on either the
left or right hand side of the boiler.
Check with your installer for the actual
capacity of pellet hopper you have with your
boiler.
Alternatively, if you have a Grant Spira 12-52,
15-62 or 18-72, your boiler will basically
consist of three par ts:
• Two boilers, each with the burner
mounted on the front
• The pellet hopper, with two pellet feed
augers protruding from the front of the
hopper casing
In this case the hopper will have a 140kg
capacity and will be located between the two
boilers.
CAUTION
All Grant Spira boilers and pellet hoppers are
designed for indoor use only and MUST be
positioned in a dry environment.
2.2 Pellet Hoppers
The pellet hopper is mounted on castors (with
the 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) for servicing.
The electrical connections to the boiler(s) are
all made to the 4-way electrical plug on one
of the three factor y-fitted ‘flying leads’ at the
rear of the pellet hopper.
All Grant pellet hoppers are fitted with a
contents switch. Refer to Figure 2-1.
This automatically detects when the level
of pellets in the hopper falls to a pre-set
minimum value.
The minimum quantity of pellets required
to restart the boiler is 20kg for the single
boiler hoppers and 30kg for the double boiler
hoppers.
If you have a bulk pellet store (refer to Section
2.3), the contents switch automatically
triggers the operation of either the bulk store
auger or Grant SpiraVAC system, whichever
is fitted, to deliver pellets from the bulk pellet
store into the pellet hopper beside the boiler.
Figure 2-1: Contents switch in the base of the
pellet hopper
When there is no bulk store (but the pellet
hopper only), the contents switch stops the
burner operating when the minimum pellet
level is reached. In this case, topping up the
hopper with more pellets will automatically
operate the contents switch and the burner
will restart, as long as there is a demand from
the heating controls (room thermostat, etc.)
for the boiler to run.
CAUTION
Always ensure that the door on the top of
the pellet hopper is closed after filling to
ensure no foreign debris enters the hopper.
The hopper should only be filled to the point
where it is still possible to close the top door.
2.3 Bulk Pellet Stores
You may also have a bulk pellet store,
located either inside or outside the building. If
so, check with you installer for the capacity of
the bulk pellet store.
If you have a bulk pellet store you will have
either a bulk store auger, or a Grant SpiraVAC
vacuum system, to move the pellets from the
bulk store to the pellet hopper as and when
required. Check with your installer regarding
which system you have fitted. If you have the
Grant SpiraVAC system, please refer to the
instructions provided with that system for
details of its operation.
NOTE
If you have a bulk pellet store it is essential
that you routinely check the level of pellets in
the store and arrange for a delivery of pellets
before the store is empty.
Where a bulk store is fitted; if the bulk store
and pellet hopper are both allowed to run out
of pellets then the error message ‘FAILED
PELLET LIGHTING’ will be displayed on the
burner control panel screen. Once the bulk
store has been refilled with pellets, the bulk
store auger (if fitted) will need to be re-primed
before the pellet hopper is automatically filled
from the bulk store.
If a Grant SpiraVAC vacuum system is fitted
refer to the Instructions supplied with the
system to restart the pellet supply to the
pellet hopper.
Once the pellet hopper is filled, the pellet
hopper auger will also need to be re-primed.
Refer to Section 7 of these instructions.
Once this has been done press the reset
button on the burner control panel to cancel
the error message and restart the boiler.
2.4 Boiler Operation
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 that
contains heat that is locked up in the flue
gases. A conventional boiler cannot recover
any of this heat and this energy is lost to the
atmosphere through the flue.
Your Grant Spira condensing wood pellet
boiler contains an extra (secondary) heat
exchanger which is designed to recover
much of the heat normally lost by a
conventional boiler through the flue system.
It does this by cooling the flue gases and
extracting more heat from them, pre-heating
the cooler water returning to the boiler from
your heating system.
Even when not operating in a condensing
mode, this additional heat exchanger ensures
that your Grant Spira boiler will still operate at
an extremely high efficiency.
4
The burner output is determined by the
delivery rate of the pellets via the pellet
feed auger (on the pellet hopper). This
is automatically controlled by the burner
control system. During commissioning the
burner control parameters should have been
checked and adjusted as necessary by your
Installer.
WARNING
Do not adjust or modify the appliance
in any way as to do so could cause
malfunction of the appliance, injury to
persons or death or result in a potential
fire hazard.
Only an Grant trained installer, who has
completed the Grant training course,
should carry out any work on the
appliance.
Once commissioned by a Grant trained
installer, your Grant Spira boiler will operate
automatically to provide heating and
domestic hot water (if you have a hot water
cylinder fitted), as long as:
• There are sufficient pellets of the correct
type in the pellet hopper. Refer to
Section 3.
• The pellet auger is fully primed. Refer to
Section 7.
• The heating system controls are set to
ON and ‘calling’, i.e. the programmer
and room thermostat are on.
• The burner ON/STANDBY switch on the
boiler control panel is set to ON. Refer to
Section 4.
If your appliance is controlled by a remote
programmer and/or a room thermostat, it
will provide heating and (when fitted) hot
water during the ON periods as set on
the programmer, when either the room
thermostat and/ or the hot water cylinder
thermostat are ‘calling’.
WARNING
Always ensure the front access door of
the combustion chamber is fully closed
and latched during operation.
Certain external surfaces of the boiler
will be hot to touch when in operation,
due care is needed.
2.5 Cleaning
The burner incorporates a brazier, located
within the boiler combustion chamber,
where the combustion of the wood pellets
takes place. This brazier is fitted with a selfcleaning system to prevent a build-up of ash
and clinker. This operates automatically after
a pre-set period has elapsed.
The boiler has two heat exchangers, the
primary and secondary (condensing), and
each is fitted with a self-cleaning system to
keep the heat exchanger tubes clear of ash
build-up. As with the brazier cleaning system,
these are operated automatically after a preset period has elapsed.
CAUTION
Even with the automatic cleaning systems,
it is vitally important that the boiler ash pan
is regularly emptied and the boiler regularly
serviced. Refer to Sections 10 and 11 of
these instructions for further information on
the cleaning and servicing of your boiler.
3 About your Fuel
You Grant Spira boiler is designed to run only
on 6mm diameter EN Plus Grade A1 wood
pellets (conforming to EN14961-2).
Under no circumstances should any other
form of biomass fuel be used with this boiler.
CAUTION
ONLY EN Plus Grade A1 (EN14961-2) wood
pellets MUST be used with your Grant Spira
boiler. These pellets must be bark and sand
free AND previously tested by Grant BEFORE
being used in your Spira boiler.
Failure to use pellets that meet the conditions
above will invalidate the product guarantee.
If you are in any doubt over which pellets are
suitable please contact Grant for assistance.
For your guidance, below are examples of
both the correct grade of pellets to be used
and poor quality pellets that must not be
used in your Grant Spira boiler.
Figure 3-1: Correct grade of pellets
Meets EN Plus Grade A1. Correct diameter
and length with no dust and minimum bark
content.
Figure 3-2: Poor quality pellets
Pellets not pressed correctly causing them
to easily disintegrate. DO NOT USE! The
auger will be unable to consistently deliver
these pellets from the hopper to the burner,
resulting in pellet lighting problems.
Figure 3-3: Pellets too dark in colour
Too much bark content. DO NOT USE!
These will cause excessive sand in the ash
resulting in clinker blocking air holes, poor
combustion and jamming of the brazier
cleaning system.
Figure 3-4: Pellets too short in length
DO NOT USE! The auger will not be able
deliver these pellets at the correct rate to the
burner, affecting the input (and output) of the
boiler and the combustion.
Figure 3-5: Pellets with high dust content
DO NOT USE! The auger will not be able
deliver these pellets from the hopper to the
burner, resulting in pellet lighting problems.
5
• BURNER ON/STANDBY switch:
To switch off the burner when required,
by interrupting the signal from the heating
system controls, i.e. the remote programmer
and room thermostat.
This switch MUST be left in the ON position
during normal operation of the boiler.
WARNING
This switch does NOT isolate the
electrical supply to the burner.
WARNING
After the burner has been switched off
(either manually using the burner ON/
STANDBY switch on the control panel,
automatically by the boiler temperature
control, 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 “WAIT
BOILER THERMOSTAT” is showing on
the burner control panel display.
• OVERHEAT thermostat:
This is a built-in safety device to automatically
shut down the boiler if it overheats.
If this device should operate, it can be
manually reset once the boiler has cooled
down.
Switch the burner ON/STANDBY switch to
‘STANDBY’ and allow the boiler to cool down.
Then unscrew the plastic cap and press
the reset button. If this overheat thermostat
continually trips there may be a fault and you
should contact your Installer.
• CLEANING AUTO/TEST switch:
When pressed and held in the TEST position,
it allows the installer or Grant service engineer
to manually operate and test the automatic
cleaning systems in both heat exchangers.
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 not operating and ‘WAIT BOILER
THERMOSTAT’ is showing on the burner
control panel display.
NOTE
The Cleaning Auto/Test switch does NOT
operate the brazier cleaning system.
WARNING
After the burner has been switched off
(either manually using the burner ON/
STANDBY switch on the control panel,
automatically by the boiler temperature
control, 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 ‘WAIT BOILER
THERMOSTAT’ is showing on the burner
control panel display.
If the burner door is opened during the
operation of the burner there can be
a large uncontrollable flame from the
brazier.
NOTE
Avoid repeated opening and closing of the
boiler door as this will cause the automatic
cleaning of the boiler and burner to be
delayed. This can cause excessive ash buildup within the boiler and burner that may result
in nuisance faults occurring.
4 Boiler Controls
Figure 4-1:Boiler Control Panel
4.1 Boiler Control Panel
The boiler control panel is located at the top
of the boiler.
This control panel is fitted with three controls,
as follows:
Loading...