Grant spira User Manual

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 self-
cleaning 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 pre-
set 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.

Grant spira Specifications

General

Brand	Grant
Model	spira
Category	Boiler
Language	English