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WPVKIT10

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.
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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:
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– 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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