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 5-18, 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 11-44, 12-52, 15-62 or 18-72, your boiler will basically consist of three parts:
•
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 factory-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.
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
Figure 2-1: Contents switch in the base of the
pellet hopper
4
