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WPVKIT20

Grant WPVKIT5, WPVKIT15, WPVKIT20, WPVKIT10 Installation & User's Instructions

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Part No. DOC.43 Rev.07 – 17/05/17
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In accordance with BS EN ISO/IEC 17050-1:2004
Grant Engineering (IRL)
Crinkle Birr Co. Offaly Ireland Telephone:
057 912 0089
057 912 1060
info@grantengineering.ie
www.grantengineering.ie
Wood Pellet Vacuum System for Domestic Wood Pellet Boilers
Grant BioVac System
amending Directives
2004/108/EC Conforms with the essential protection requirements of the
Electromagnetic Compatibility Directive and its amending Directives
requirements.
EN60335-2-2:2010 Household and similar electrical appliances. Safety. Particular
requirements for vacuum cleaners and water suction cleaning
appliances. EN55014-1:2006 Electromagnetic Compatibility. Requirements for household appliances. MCS008 Product Certification scheme requirements - Biomass
This appliance is deemed a controlled service and specific regional statutory requirements may be applicable.
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1.
4
2.1 Kit contents 5
2.2 Technical data 6
2.3 System arrangement 6
3.1 Vacuum unit 7
3.2 Auger unit 8
3.3 Flexible tubes 9
3.4 Operating sequences 9
4.1 Auger unit 13
4.2 Vacuum unit 15
4.3 Flexible pellet tubes 17
5.1 General 19
5.2 Connection of pellet hopper 19
5.3 Connection of vacuum unit to pellet hopper 19
5.4 Connection of vacuum unit to auger unit 20
5.5 Wiring diagrams 21
6.1 General 26
6.2 Procedure 26
7.1 Vacuum unit 28
7.2 Auger unit 29
7.3 Pellet tubes 29
8.1 Introduction 30
8.2 About the Spira-Vac system 30
8.3 Controls 30
8.4 Starting the system 31
8.5 ‘Night time’ operation 31
8.6 Manual operation 32
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These Installation instructions should be read carefully before installing the SpiraVac system and must be used in conjunction with the Grant Spira Installation & User instructions supplied with the boiler. Installation of the Grant Spira boiler and Grant SpiraVac system must only be carried out by a Grant Approved Installer who has successfully completed the Grant Spira training course.
The Grant SpiraVac is a vacuum system for conveying wood pellets from a bulk store to the pellet hopper located adjacent to the Grant Spira boiler. It is designed specifically for use with the Grant Spira wood pellet boilers and should not be used with other wood pellet burning appliances. It is intended to convey 6mm diameter EN Plus A1 (BS EN ISO17225-2:2014) wood pellets only and should not be used for any other application.
Grant Engineering UK Ltd shall not be liable for any injury or damage arising from the incorrect use of this system. For correct usage, refer to these Installation and User instructions.
Installation of the Grant Spira wood pellet boiler, and the SpiraVac system, must be carried out by a competent person in accordance with all current legislation, codes of practice and local by-laws relating to the installation of solid fuel burning appliances.
The electrical installation must comply with the requirements of the Electricity at Work Regulations 1989 and BS7671:2008 - IET Wiring Regulations 17
th
Edition (including all amendments).
All installations of Grant Spira wood pellet boilers must comply with the relevant Building Regulations.
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• 1 x Auger unit
• 1 x Vacuum unit
• 1 x Pellet dam plate
• 4 x ‘Jubilee’ type pipe clips
• Flexible pellet tube (length dependant on kit – see table below)
• Metal pipe clips (quantity to suit tube length used – see table below)
• Installation & User Instructions
Note. The electrical cable required to connect the auger unit to the vacuum unit to be supplied by installer.
SpiraVac Kit
Ref No.
Length of flexible tube (between
auger unit and vacuum unit)
Number and lengths of
tube supplied
Quantity of metal
pipe support clips
WPVKIT5
5m
1 x 10m length
10
WPVKIT10
10m
2 x 10m length
20
WPVKIT15
15m
2 x 15m length
30
WPVKIT20
20m
2 x 20m length
40
ALL THREE
Figure 2-1.
Auger unit
Figure 2-2.
Vacuum unit
Figure 2-3.
Flexible pellet tube
Figure 2-4.
Pellet dam plate
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Auger unit
Vacuum unit
Weight 16.4kg 24kg
Supply Voltage
230V 50HZ 1ph 13A fused*
Running Current
8.6A
Power
1870W
*Refer to Section 5.2 for further details on fuse ratings required
Spira pellet boiler
Bulk pellet store
Auger unit
Flexible pellet tubes
Vacuum unit
Boiler pellet hopper
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The Grant SpiraVac pellet feed system consists of the following items
The vacuum unit can be fixed to the top rear panel of the pellet hopper to face in any one of three directions; with the control panel facing forwards, to the right or to the left.
Front view of vacuum unit
Rear view of vacuum unit
The vacuum unit contains a vacuum motor that pulls air through the cyclone. Air to cool the vacuum motor is drawn in through a vent in the top of the enclosure and exhausted through an opening in the rear. Refer to Figures 3-1 and 3-2.
IMPORTANT: Ensure that the cooling vents on the top and at the rear of the vacuum unit are not obstructed at any time.
The cyclone section of the vacuum unit is located below the enclosure (located within the top part of the pellet hopper when fitted). It is fitted with a counterbalanced trap door at the bottom. This door is drawn closed by the vacuum generated when the motor is running. When the motor stops, and the vacuum ceases, the weight of the pellets collected in the cyclone pushes the door open and the pellets are deposited into the hopper.
The unit also incorporates a vacuum switch, that is operated by the vacuum produced by the vacuum motor in order for the auger unit (located on the bulk pellet store) to run. Thus the auger motor can only run when the vacuum motor is operating.
The vacuum unit is lined with acoustic insulation to reduce the noise level.
Two steel connection spigots are provided, on the rear face of the unit, for connection of the vacuum system flexible tubes. Refer to Figure 3-2.
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The vacuum unit has two factory-fitted flying leads with pre-wired plugs.
• The 6-way plug connects the vacuum unit to the pellet hopper, via the corresponding factory
fitted flying lead and pre-wired 6-way connector (to be found within the electrical wiring enclosure at the rear of the pellet hopper).
• The 3-way plug provides the electrical connection for the remote auger unit. A suitably sized
cable of the required length must be connected between the corresponding 3-way connector (supplied fitted to the plug) and the electrical isolator of the remote auger (mounted on the bulk pellet store). Refer to Figure 5-5.
The vacuum unit has a control panel fitted with a ‘VACUUM SYSTEM’ ON/OFF switch and indicator neon. Refer to Figure 3-3.
Vacuum unit control panel
For details on the operation of these controls, refer to the User Instructions in Section 8 of these Installation & User Instructions.
The unit consists of a 410mm long auger, driven by an electric motor, which delivers pellets into the suction chamber. Refer to Figure 3-5.
Two steel connection spigots are provided, on the end of the suction chamber, for connection of the vacuum system flexible tubes. Refer to Figure 3-5. The auger motor and suction chamber are enclosed beneath a removable steel cover, held in place by two nuts.
A 3-pole 16A isolator is factory fitted to the auger unit for local isolation of the auger motor when required. This isolator is pre-wired to the auger motor. An electrical supply, from the 3-way plug on the vacuum unit, must be connected by the installer to the input of the isolator. Refer to Section 5 for electrical connection details.
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The tube supplied is a 50mm diameter reinforced Polyurethane flexible tube with a copper anti-static wire moulded into the tube wall. When fitting the tube, this wire must be exposed and placed in contact with the steel connections (on the vacuum and auger units) at each end. Refer to Section 5.3 for details.
The maximum length of tube between the vacuum and auger units is 20 metres (i.e. 2 x 20 metres lengths
- one each way). The maximum rise over that length is 5 metres. No reduction in this maximum allowance is required for any changes in the height of the tube over the length of run.
Both tubes are secured at each end, to the connections on the vacuum and auger units, using the four hose clips provided with the kit. Refer to Section 4.3 for details.
Any pellet tubes run against walls MUST be adequately supported at no more that 1 metre centres, and at either sides of a bend in the tube, using the 50mm metal pipe clips provided.
• When this switch is set to ON – the vacuum system operates in Automatic mode. Refer to
Section 3.4.1 below.
• When this switch is set to OFF – the vacuum system operates in Manual mode. Refer to Section
3.4.2 below
In this condition the SpiraVac can function in one of two different automatic operating modes:
•
– to automatically top-up the hopper when the weight of pellets in the pellet hopper falls below the minimum level, as detected by the contents diaphragm switch. Once the contents switch is activated, the vacuum motor and filling process will automatically start, as detailed below.
Figure 3-5
. Auger unit with cover removed
Figure 3-4.
Auger unit with cover fitted
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•
– to automatically fill the hopper with pellets, up to the trap door of the vacuum unit trap door, every 24 hours starting when the ON/OFF switch on the SpiraVac control panel is first set to ON.
In both cases the operation of the vacuum unit is as follows – Refer to the flow diagram in Figure 3-6.
The vacuum motor will start and create a vacuum in the cyclone. This pulls closed the trap door at the base of the cyclone. The vacuum switch, inside the vacuum unit, is activated. Power is supplied to the pellet auger located in the base of the bulk pellet store.
The auger starts and pulls pellets into the suction chamber of the auger unit, where they are drawn into and through the flexible suction tube to the vacuum unit, and then deposited in the cyclone. The red indicator neon on the vacuum unit control panel will blink on and off during this process.
The pellet auger runs for
and is then automatically switched off. The vacuum motor runs on
for a further
after the auger has stopped (to ensure no pellet build up in the tubes) before it is
automatically switched off (i.e. a total vacuum motor running time of 75 seconds).
When the vacuum unit stops, the loss of the vacuum allows the weight of the pellets to open the trap door and the pellets fall into the hopper.
The vacuum system will deliver approximately 6kg of pellets in each operation, and will therefore have to operate several times to either top up or fill the pellet hopper.
The vacuum system will operate repeatedly to top-up the hopper until it is filled with pellets up to the level of the trap door of the cyclone as on the initial operation of the vacuum system. In this condition the trap door will be prevented from closing by the pellets.
If the pellet hopper contents switch has detected a low pellet level and the vacuum motor system is operating, but the pellet hopper contents switch is not satisfied after 26 attempts (e.g. due to the bulk pellet store being empty) then the system will go into ‘fault’ mode.
The indicator neon on the control panel will remain on constantly. The user can over-ride this by switching the ‘VACUUM SYSTEM’ switch to OFF and filling the pellet hopper manually (see Section 3.4.2 – Manual Mode below).
NOTE When the ‘VACUUM SYSTEM’ switch is set to OFF the indicator neon will remain lit. When it is switched back to ON the indicator neon will now go out.
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The vacuum system will operate repeatedly until the hopper is filled with pellets up to the trap door of the cyclone, as on the initial operation of the vacuum system.
It is possible to re-set the time that this ’24 hour’ operation occurs to a more suitable time (e.g. during the evening) to avoid the automatic operation of the vacuum system during the night time.
To do this, simply switch the ‘VACUUM SYSTEM’ switch to OFF, wait about 2 seconds and then switch it back to ON at the time you wish the ’24-hour’ operation to occur. This time will be automatically stored in the control system memory and the store will then fill at the same time every day (if required).
In this setting, the pellet hopper can be fed with bagged pellets for as long as required.
The switched live to the boiler will be interrupted when the weight of pellets in the pellet hopper falls below the minimum level of the contents diaphragm switch, and the burner will shut down.
The burner control panel screen on the Spira boiler will show a ‘WAIT BOILER THERMOSTAT’ message until the pellet level in the hopper is topped up with at least an additional 20kg of pellets.
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SpiraVac operation flow diagram
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1. To fit the auger unit to the Grant bulk pellet store, use the following procedure: Unscrew and remove the two domed nuts and remove the galvanised steel cover from the auger unit. Refer to Figure 4-1.
2. Unscrew and remove the four nuts holding the mounting flange to the auger unit and remove the flange over the auger. Refer to Figures 4-3 and 4-4. Leave the circular neoprene gasket in place on the auger.
IMPORTANT: Take care not to strain the cable between the isolator (on the mounting flange) and the auger motor (in auger unit).
3. On the bottom section of the bulk pellet store, unscrew and remove the eight M8 screws around the auger sleeve opening. Remove and discard the flange and auger sleeve but
. Refer to Figure 4-5. Ensure that the factory-fitted neoprene gasket is still in place around the opening and not damaged. Refer to Figure 4-6. The SpiraVac auger unit can be fitted to this opening as described in paragraph 5 below.
Figure 4-3.
Auger unit flange fixings - left
Figure 4-2.
Auger unit with cover removed
Figure 4-4.
Auger unit flange fixings - right
Figure 4-1A.
Auger unit with cover fitted
Fixing
bolts
Domed nuts
Fixing
bolts
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4.
This opening is lower on the store than the auger sleeve
opening.
To do this, first remove the auger sleeve from the store as described above. Then unscrew and remove the eight M8 screws around the removable panel (on opposite face to auger sleeve). Remove the panel, fit it to the auger sleeve opening and secure in place with the screws previously removed. Ensure that the factory-fitted neoprene gasket is still in place around the opening and not damaged. Refer to Figure 4-6.
5. Position the auger unit mounting flange over the outlet opening, aligning the holes in the flange with those around the opening. Ensure that the electrical isolator is correctly positioned to the right of the hole. Refer to Figure 4-7.
IMPORTANT: Ensure that the four fixing bolts are correctly fitted through the mounting flange (from the back) before fitting the flange to the bulk pellet store.
6. Fasten the mounting flange to the bottom section of the pellet store using the eight M8 screws previously removed. Refer to Figure 4-7.
7. Check that the circular neoprene gasket is correctly fitted on the auger, against the back face of the suction chamber. Fit the auger through the round hole in the mounting flange and align the four bolts on the mounting flange with the four holes on the auger unit. Fit the four nuts to secure the auger unit to the bulk pellet store. Refer to Figure 4-8.
Figure 4-5.
Bulk store flange/auger sleeve
Figure 4-8.
Auger unit mounted on store
Figure 4-7.
Auger unit mounting flange fitted
Figure 4-6.
Bulk store opening with gasket
M8 fixing screws
Neoprene gasket
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1. Open the hinged door on top of the pellet hopper. Disengage the door stay from the slot (on left hand side) and lay the door flat on the rear top section. Refer to Figure 4-9.
2. Unscrew and remove the six screws along the front and back edges of the grill and remove the grille from the front of the hopper. Refer to Figure 4-10.
3. Close the door. Unscrew and remove the four screws holding the top rear panel to the hopper. Remove the complete top panel assembly (including hinged door) from the hopper.
4. Unscrew and remove the four nuts holding the square cover panel in place on the rear top panel of the hopper. Remove the cover panel from the hopper. Refer to Figure 4-11.
5. Carefully place the vacuum unit, top down, on something to protect the paint finish. Remove the four fixing screws from the vacuum unit. Invert the top panel and place it over the cyclone of the vacuum unit. Position the top panel so that the vacuum unit faces in the required direction – forwards or to the left or right. Refer to Figure 4-12.
6. Fix the panel to the underside of the vacuum unit using the four screws supplied with the vacuum unit – screwing through the panel into the threaded inserts in the base of the vacuum unit.
Figure 4-10.
Hopper grille fixings
Figure 4-11.
Hopper top panel
Figure 4-12.
Panel and vacuum unit
Figure 4-9.
Hopper door opened flat
Remove these screws
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7. Unscrew and remove the three screws and nuts holding the pellet deflector channel inside the rear of the hopper. Take care not to drop the small nuts into the hopper! Remove the
deflector channel from the hopper and replace the screws and nuts to block off the
holes. Refer to Figure 4-13.
8. Re-fit the top panel (complete with vacuum unit) back on top of the hopper. Secure top panel using the four screws previously removed. Refer to Figure 4-14.
9. Open the hinged door on top of the pellet hopper and rest it against the front of the vacuum unit. To prevent the door from dropping closed whilst fitting the pellet dam plate, secure it to the vacuum unit using duct tape or similar.
10. Fit the pellet dam plate into the hopper with the bracket (on the back of the plate) facing toward the back of the hopper and the three fixing holes at the top. Refer to Figure 4-15.
Fix the pellet dam plate in place using three screws (previously removed) in the corresponding holes along the front edge of the hopper rear top panel. Refer to Figure 4-16.
11. Insert the grille into the hopper opening (with the door stay opening to the left). Align and engage the three ‘keyhole’ slots (in the rear edge of the grille) with the three corresponding grille fixing screws on the front edge of the hopper rear top panel. Refer to Figure 4-17.
Figure 4-13.
Pellet deflector channel
Figure 4-14.
Vacuum unit on hopper
Figure 4-15.
Pellet dam plate
Figure 4-16. P
ellet dam plate fixings
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12. Fit the three remaining screws (previously removed) in the holes along the front edge of the grille and tighten all six screws to secure the grille and pellet dam plate in position. Refer to Figure 4-18.
IMPORTANT: ENSURE THAT SCREWS ARE NOT DROPPED INSIDE THE HOPPER!
13. Locate the door stay in the slot (on left hand side) and check the door opens and closes correctly. Refer to Figure 4-19.
All connections must be made using the following procedure:
1. Cut the two flexible tubes to the required length.
2. Cut back the tube at each end to expose approximately 40-50mm of the copper anti-static wire. Refer to Figure 4-20.
Figure 4-17.
Secure dam plate and grille
Figure 4-18.
Fix grille at front edge
Figure 4-19.
Grille and pellet dam plate fitted
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3. Place one of the jubilee clips provided over the end of the tube. Fold the anti-static wire back inside the tube. Refer to Figure 4-21.
4. Push the tube fully onto the ‘VACUUM RETURN’ connection spigot (on the vacuum unit), ensuring that the anti-static wire is in contact with the unpainted steel surface of the connection spigot. Tighten the jubilee clip to secure the tube in place and clamp the anti-static wire to the spigot. Refer to Figure 4-22.
5. Connect the other end of the flexible tube to the ‘VACUUM RETURN’ on the auger unit.
6. Repeat this process using the second flexible tube to connect the ‘VACUUM FLOW’ connection (on the auger unit) to the ‘VACUUM FLOW’ connection (on the vacuum unit).
If the vacuum unit operates but no pellets are delivered to the hopper from the store:
• Switch the ‘VACUUM SYSTEM’ ON/OFF switch to OFF.
• Isolate the electrical supply to the boiler and SpiraVac system.
• Check that two flexible tubes between the vacuum unit and auger unit are correctly connected.
• Rectify any incorrect ‘cross connections’
• Reconnect the power supply, Switch the ‘VACUUM SYSTEM’ ON/OFF switch to ON and check
that the SpiraVac system operates correctly.
Figure 4-22.
Tube secured with clip
Figure 4-20.
Anti-static wire exposed
Figure 4-21.
Anti-static wire folded in
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be installed by a competent person to comply with the requirements of the Electricity at Work Regulations 1989 and BS7671:2008 – IET Wiring Regulations 17
th
Edition (including all amendments).
Figure 5-2 (for single boiler hopper) or Figure 5-3 (for double boiler hopper) for the electrical wiring diagram for the pellet hopper.
The Grant Spira pellet boiler and SpiraVac system requires a 230V ~ 50 Hz supply. This must be supplied via a 13A fused double pole isolator, providing complete electrical isolation for the heating control system, Spira hopper/boiler and SpiraVac system.
A second fused double pole isolator is required to provide a 5A fused supply to the boiler and heating control system only. Refer to Figure 5-6 for the wiring details with an S-plan type heating control system.
The power supply cable to the hopper should be at least 1.5mm² PVC.
Refer to the main Installation Instructions, supplied with the boiler, for further details on the wiring of the electrical system controls and the other electrical connections on the boiler to be made during installation.
Location of selector switch (inside hopper wiring centre)
The vacuum unit is supplied with two factory-fitted flying leads with pre-wired plugs.
The 6-way plug and lead connects the vacuum unit to the pellet hopper. Connect this plug to the corresponding 6-way connector (to be found within the electrical wiring enclosure at the rear of the pellet hopper). Refer to Figure 5-1 for location of 6-way connector.
6-way connector (docked on
the contents switch bracket)
Selector switch
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This connection provides the 230V 50 Hz electrical supply required to operate the Grant SpiraVAC system, and switched live (to start the vacuum system when the contents switch in the hopper detects a minimum pellet level).
To connect the hopper to the Vacuum unit:
• 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 selector switch on the diaphragm switch bracket to the ‘BULK STORE’ position. See
Figure 5-1.
• 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 the Vacuum unit. Ensure that the plug and socket are fully pushed together until the small catch clicks into place.
A corresponding 3-way connector is supplied fitted to the plug for connection of the cable to the remote auger unit
The auger unit is supplied with a factory fitted isolator, which is pre-wired to the auger motor.
The connection between the 3-way plug connection (at the vacuum unit) and the electrical isolator (on the
auger unit) must be made using a suitable size and type of cable, dependant on the cable length and the route taken to the auger unit.
Where this is external to the building this cable must be of a suitable specification, e.g. UV stabilised PVC sheath, SWA cable, etc. depending on the application.
Refer to Figure 5-5 for details of the plug and socket connection between the vacuum unit and the auger unit.IN
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Spira pellet hopper wiring diagram – single hopper.
Spira pellet hopper wiring diagram – double hopper.
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Vacuum unit wiring diagram.
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Connection between vacuum unit and auger unit.
Connect the 3-way socket
(provided with the vacuum unit) to isolator on auger unit. Refer to Section 5.4.
Connect socket to the corresponding plug on flying lead from vacuum unit. Refer to Figure 5-4.
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Heating system controls – S-plan type system connection diagram.
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Heating system controls – Y-plan type system connection diagram.
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The Grant SpiraVac system should be commissioned as part as the overall commissioning of the Grant Spira boiler to which it is fitted. Reference must be made to Section 10 of the main Installation instructions supplied with the boiler.
IMPORTANT BEFORE attempting to prime the pellet hopper auger (as covered in Section 10.7 of the Installation & Servicing instructions provided with the boiler) it is essential to first transfer pellets from the bulk store into the pellet hopper using the SpiraVac system
1. Check the electrical supply to the hopper/boiler is isolated, i.e. switched off at the fused isolator.
2. Check the boiler ON/STANDBY switch to STANDBY.
3. Set the ‘VACUUM SYSTEM’ switch (on the SpiraVac control panel) to OFF.
4. Check that both flexible system tubes are correctly fitted between the vacuum unit and auger
unit. Refer to Section 4.3 for details.
5. Check that there is a sufficient quantity of pellets in the bulk pellet store.
6. Switch the electrical isolator (on the auger unit) to ON.
7. Switch on the electrical supply to the hopper/boiler at the fused isolator.
8. Switch the ‘VACUUM SYSTEM’ switch to ON. The vacuum unit should now start and pellets will
delivered to the pellet hopper from the bulk store. Refer to the User Instructions (in Section 8 of these Instructions) for further details.
The first time the Grant SpiraVac system is switched on, as described above, it will operate several times until the hopper is filled with pellets up to the level of the counterweighted trap door of the vacuum unit. In this condition the trap door will be prevented from closing by the pellets. This is intentional as further operation of the vacuum system is not required with this amount of pellets in the hopper. Once this has been done the vacuum system will automatically stop.
The SpiraVac system is now operational and will automatically operate to re-fill the pellet hopper when the pellet level in the pellet hopper falls to the minimum level.
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It is possible to re-set the time that this ’24 hour’ operation occurs to a more suitable time (e.g. during the evening) to avoid the automatic operation of the vacuum system during the night time.
To do this, simply switch the ‘VACUUM SYSTEM’ switch to OFF wait for about 2 seconds and then switch back to ON at the time you wish the ’24-hour’ operation to occur. This time will be automatically stored in the control system memory and the store will then fill at the same time every day (if required).
After the pellet hopper auger is fully primed, leave the ‘VACUUM SYSTEM’ switch set to ON.
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• Set the ‘VACUUM SYSTEM’ switch on the SpiraVac control panel to OFF.
• Disconnect the 6-way connector between the pellet hopper and the vacuum unit.
This will enable the boiler to be left operating whilst the SpiraVac system is serviced.
On completion of the service work, re-connect the electrical supply from the pellet hopper using the reverse of the above procedure.
1. Remove the cover from the vacuum unit, as follows:
• Unscrew and remove the four upper outer screws at the rear of the vacuum unit. Refer to Figure
7-1. IMPORTANT Do NOT remove the four screws at the bottom rear of the vacuum unit.
• Slacken off the four screws – two on each side, at the bottom of the cover sides. Refer to Figure
7-2.
• Carefully lift the cover up and off the vacuum unit taking care to disconnect ‘in-line’ connection in
the earth wire before completely removing the cover from the vacuum unit. Refer to Figure 7-3.
Figure 7-4.
Vacuum unit without cover
Figure 7-1.
Cover fixing screws - rear
Figure 7-2.
Cover fixing screws - sides
Figure 7-3. Earth wire connector
Vacuum motor air inlet
Remove these
four screws
Loosen these
two screws on
both sides
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2. Carefully clean out any dust and fluff from within the vacuum unit enclosure. In particular ensure that the air inlet to the vacuum motor is clear. Refer to figure 7-4.
3. Check the vacuum unit cover, remove any dust and fluff from the inner surfaces taking care not to damage the acoustic lining. Check that the inlet grille in the top surface is clear.
5. Check the condition of the pressure switch tube.
6. Replace the vacuum unit cover using the reverse of the removal procedure.
1. Isolate the electrical supply to the auger motor using the remote isolator mounted on the auger unit. Set the isolator to OFF and lock it off.
2. Unscrew and remove the two domed nuts and remove the galvanised steel cover from the auger unit. Refer to Figure 7-5.
3. Inspect the suction chamber through the glass panel. Check for any signs of blockage that could interfere with the operation of the auger. Refer to Figure 7-6.
4. If necessary, unscrew and remove the two nuts and remove the top cover from the suction chamber. Check the seal on the underside of the cover. When replacing the cover ensure that it is correctly fitted before tightening the nuts.
1. Where possible, check along the entire length of both flexible pellet tubes for any signs of damage or wear – either internal or external and any signs of blockage. Rectify as necessary.
2. Check that BOTH pellet tubes are securely connected to the spigot connectors at BOTH ends, i.e. at the vacuum unit and at the auger unit. Check that the anti-static wire is in contact with the unpainted steel surface of the connection spigot. Refer to Section 4.3 for details.
3. If necessary, tighten the ‘jubilee’ hose clip to secure the tube in place and clamp the anti-static wire to the spigot. Refer to Figure 4-22.
Figure 7-6. Suction chamber window
Figure 7-5.
Auger unit with cover
Domed nuts
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system when used in conjunction with a Grant Spira wood pellet boiler.
These instructions must be read and used in conjunction with the User Instructions supplied with the Grant Spira wood pellet boiler.
The Installers information for the installation and maintenance of this vacuum system is covered in Sections 1 to 7 of these Installation & User Instructions.
When the level of the pellets in the pellet hopper falls to a minimum level the contents switch (built into the hopper) is activated. This in turn starts the vacuum motor in the vacuum unit and also the auger in the auger unit. The auger pulls pellets from the base of the pellet store and the vacuum draws the pellets through the suction flow tube to the vacuum unit.
Here the pellets are collected in the cyclone unit (beneath the vacuum unit - within the pellet hopper). After running for 75 seconds the vacuum motor stops. The trap door at the base of the cyclone opens and the pellets stored within fall into the hopper.
This process will be repeated several times until the hopper is filled with pellets up to the level of the trap door of the cyclone. In this condition the trap door will be prevented from closing by the pellets. This is intentional as further operation of the vacuum system is not required with this amount of pellets in the hopper. Refer to the flow diagram in Figure 3-6 for further information on the Grant SpiraVac operation.
INDICATOR NEON
. Refer to Figure 8-1.
Vacuum system control panel
When the ‘VACUUM SWITCH’ is switch is set to OFF the small red neon on the switch will not be lit and the vacuum system will NOT be operational.
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If the INDICATOR NEON is not lit, this indicates a problem with the power supply to the boiler and/or the Vacuum system. Please contact your installer or service engineer for assistance.
If the INDICATOR NEON is lit it indicates that there is a fault with the vacuum system. Please contact your installer or service engineer for assistance.
Vacuum System
Switch Setting
Vacuum system
Switch Neon
Red Indicator
Neon
Vacuum System Status
OFF OFF ON
Vacuum system is on standby but will
not automatically operate
OFF OFF OFF
No power to vacuum system
ON ON OFF
Vacuum system ready to operate when
pellet level in hopper is at minimum
ON ON ON
Fault with vacuum system
The SpiraVac system is now operational and will automatically operate to re-fill the pellet hopper when the pellet level in the pellet hopper falls to the minimum level.
The ’24 Hour’ operating mode can be set to automatically fill the pellet store with sufficient pellets, at a
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suitable time (e.g. during the evening), to avoid the automatic operation of the vacuum system during the night time.
To do this, simply switch the ‘VACUUM SYSTEM’ switch (on the vacuum unit) to OFF and then back to ON at the time you wish the store to be pre-loaded.
This time will be automatically stored in the memory of the system control and the store will then fill at the same time every day (i.e. at 24 hour intervals).
The vacuum system will operate until the hopper is filled with pellets up to the level of the trap door of the cyclone. In this condition the trap door will be prevented from closing by the pellets. This is intentional as further operation of the vacuum system is not required with this amount of pellets in the hopper.
If you wish to change the time the store is pre-loaded by the ’24 Hour’ operation of the SpiraVac system, then simply repeat the process at a different time and then this filling operation will be repeated at this new time every 24 hours.
Once the vacuum system has filled the hopper with sufficient pellets to prevent operation during the night time period, the vacuum system will stop.
To do this, set the ‘VACUUM SYSTEM’ switch (on the vacuum unit) to OFF. The pellet hopper will now operate as if no vacuum system is installed.
The level of pellets in the hopper needs to be monitored and topped up as necessary to keep the boiler in operation. If the level of pellets in the hopper falls to the minimum level the contents switch (built into the hopper) will automatically switch the boiler off. In this case simply put more pellets (at least an additional 20kg) into the hopper to satisfy the contents switch and the boiler will start again.
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SpiraVac has been installed in full accordance with the installation and servicing instructions issued.
This will be extended to a total period of
if the wood pellet boiler and SpiraVac is registered with
Grant Engineering (UK) Limited
intervals
3
. See main Terms and Conditions below.
guarantee (giving
from the date of installation).
This does not affect your statutory rights
1
.
• Ensure the boiler and SpiraVac has been installed, commissioned and serviced by a competent
person in accordance with the installation and servicing instructions.
• 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 installation
and servicing instructions supplied with the SpiraVac for guidance.
guarantee period no charge for parts or labour will be made provided that the boiler and SpiraVac has been installed and commissioned correctly in accordance with the manufacturer’s installation and servicing instructions, it was registered with Grant Engineering (UK) Limited within thirty days of installation
4
and, for boilers and a SpiraVac over twelve months old, details of annual service is
available
3
.
The following documents must be made available to Grant Engineering (UK) Limited on request:
• Proof of purchase
• Commissioning Report Form
• Service documents
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• If the SpiraVac has been installed over
.
• If the boiler and SpiraVac has not been installed, commissioned, or serviced by a competent person
in accordance with the installation and servicing instructions.
• The serial number has been removed or made illegible.
• Fault(s) due to accidental damage, tampering, unauthorised adjustment, neglect, misuse or
operating the boiler or SpiraVac contrary to the manufacturer’s installation and servicing instructions.
• Damage due to external causes such as bad weather conditions (flood, storms, lightning, frost,
snow, ice), fire, explosion, accident or theft.
• Fault(s) due to incorrectly sized expansion vessel(s), incorrect vessel charge pressure or inadequate
expansion on the system.
• Fault(s) caused by external electrics and external components not supplied by Grant Engineering
(UK) Limited.
• 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 Engineering (UK) Limited).
• Removing any pellet store or hopper contamination or blockages in the pellet augers, pellet hopper
or bulk pellet store.
• Removal of dust from the pellet augers, pellet hopper or bulk pellet store.
• Boiler and SpiraVac servicing, de-scaling or flushing.
• Checking or replenishing system pressure.
• Electrical cables and plugs, heating system controls not supplied by Grant Engineering (UK) Limited.
• Heating system components, such as radiators, pipes, fittings, pumps and valves not supplied by
Grant Engineering (UK) Limited.
• Instances where the SpiraVac has been un-installed and re-installed in another location.
• Installations where the SpiraVac is not installed with a Grant Engineering (UK) Limited wood pellet
boiler.
• Use of spare parts not authorised by Grant Engineering (UK) Limited.
• Consumable items.
• The Company shall mean Grant Engineering (UK) Limited.
• The SpiraVac must be installed by a competent installer and in full accordance with the relevant
Codes of Practice, Regulations and Legislation in force at the time of installation.
• The SpiraVac is guaranteed for
from the date of installation4, providing that after twelve
months the annual service has been completed
3
and the SpiraVac registered with the Company within thirty days of installation. Any work undertaken must be authorised by the Company and carried out by a competent service engineer.
• This guarantee does not cover breakdowns caused by incorrect installation, neglect, misuse,
accident or failure to operate the SpiraVac in accordance with the manufacturer’s installation and servicing instructions.
• The SpiraVac is registered with the Company within thirty days of installation
4
. Failure to do so does
not affect your statutory rights
1
.
• The balance of the guarantee is transferable providing the installation is serviced prior to the
dwelling’s new owners taking up residence. Grant Engineering (UK) Limited must be informed of the new owner’s details.
• The Company will endeavour to provide prompt service in the unlikely event of a problem occurring,
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but cannot be held responsible for any consequences of delay however caused.
• This guarantee applies to Grant Engineering (UK) Limited SpiraVac purchased and installed on the
UK mainland, Isle of Wight, Channel Islands and Scottish Isles only
2
. Provision of in-guarantee cover
elsewhere in the UK is subject to agreement with the Company.
• 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.
• Proof of purchase and date of installation, commissioning and service documents must be provided
on request.
• If a replacement SpiraVac is supplied under the guarantee (due to a manufacturing fault) the product
guarantee continues from the installation date of the original SpiraVAC, and
from the installation
date of the replacement4.
• The replacement of a SpiraVac under this guarantee does not include any consequential costs.
1
Your statutory rights entitle you to a one year guarantee period only.
2
The UK mainland consists of England, Scotland and Wales only. Please note that for the purposes of this definition, Northern Ireland, Isle of Man and Scilly Isles are
considered part
of the UK mainland.
3
We recommend that your SpiraVac is serviced every twelve months (even when the guarantee has expired) to prolong the lifespan and ensure it is operating safely and efficiently.
4
The guarantee period will commence from the date of installation, unless the installation date is
more than six months from the date of purchase, in which case the guarantee period will commence six months from the date of purchase.
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