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Vent-Axia LoWatt HR204, User, Installation & Servicing Instructions, Page: 2 / 24

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Vent-Axia LoWatt HR204 User, Installation & Servicing Instructions Download Page 2

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Contents

Section

Page

1.0

Safety and Guidance Notes

2.0

User Information

3.0

General Layout

4.0

Technical Data

5.0

Appliance Operation

6.0

Installation Requirements

7.0

Installation

8.0

Wiring Diagrams

9.0

Commissioning

10.0

Maintenance

11.0

Changing Components

12.0

Fault Finding

13.0

Short Parts List

3

4

5

6

8

9

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19

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Summary of Contents for LoWatt HR204

Page 1: ...Please leave these instructions with the user Whole House Ventilation System with Heat Recovery User Installation Servicing Instructions LoWatt HR204 ABC...

Page 2: ...ation 3 0 General Layout 4 0 Technical Data 5 0 Appliance Operation 6 0 Installation Requirements 7 0 Installation 8 0 Wiring Diagrams 9 0 Commissioning 10 0 Maintenance 11 0 Changing Components 12 0...

Page 3: ...nd phase complies with the rating label 5 The LoWatt HR204 should only be used in conjunction with the appropriate Vent Axia accessories 6 When the LoWatt HR204 is used to remove air from a room conta...

Page 4: ...st Out Fresh Air In Hot Stale Air In Warm Air Out Applicable only to products installed and used in the United Kingdom For details of the Guarantee outside of the United Kingdom contact your local sup...

Page 5: ...upplied out to dry rooms 1 2 8 10 9 11 15 6 7 14 4 13 5 12 Fig 2 3 1 Heat exchanger 2 Fan fresh air in 3 Rating label 4 Fuse 5 Speed select PCB 6 Accessory switch connection 7 Dip switch for speed sel...

Page 6: ...ed 6 10 13 21 35 56 75 Duct connections Condensate connection Electrical supply External fuse rating Internal fuse rating Filtration Appliance must be connected to an earthed supply Fig 4 SAP Appendix...

Page 7: ...5 The unit has six speeds One of the lowest five can be selected for normal speed One of the top 3 can be selected for boost speed The performance curve chart gives the ventilation rates at each fan s...

Page 8: ...boost Switch NBSW N m or al Bo t os Humidity Sensor HS6 Normal boost Pull Cord Switch PCSW CMSM control TIM2 timer The LoWatt HR204 can only be connected to external controls with an uncommitted rela...

Page 9: ...ents must also be sited away from other flue terminals ventilators etc on the outside of the dwelling In addition there shall be adequate ventilation of the kitchen when a cooker hood is used at the s...

Page 10: ...drawn back into the house 2 The duct work system should be sized and installed to minimise the pressure loss along it 3 Using larger diameter pipes and keeping the number of bends and fittings used t...

Page 11: ...Minimum Front Clearance for servicing 250 280 Clearances HR205 Minimum Side Clearance MVHR 24 Minimum Side Clearance MVHR 24 Minimum Top Clearance for servicing 200 300 Minimum Front Clearance for se...

Page 12: ...200 Minimum Side Clearance 5 Minimum Side Clearance 5 Clearances HR204 Minimum Bottom Clearance 100 Minimum Front Clearance for servicing 250 280 Clearances HR205c Minimum Side Clearance MVHR 24 Minim...

Page 13: ...y until it discharges into the drain Fig 11 Remove bottom cover panel to access the fan speed settings condensate connection Condensate rear exit shown Side View Front Rear Condensate drain 15mm Rear...

Page 14: ...set to the appropriate speed as determined by air flow required and duct system pressure see page 7 2 To change the speed settings of the fans change the position of the dip switches on the PCB The 5...

Page 15: ...al Boost Switch NBSW or Pull Switch PCSW Common Boost Normal L Fan air out Fan air in SPEED SELECT 1 2 L N 1 2 3 4 5 6 7 8 Normal Boost 1 2 3 4 5 4 5 6 ON MOTOR CONTROL A B MOTOR SUPPLY A B 220 240V 5...

Page 16: ...MOTOR SUPPLY A B 220 240V 50Hz MOTOR B CONTROL P C B MOTOR A CONTROL P C B CHASSIS N 16 8 0 Wiring Diagrams Fig 14 LoWatt HR204 Wiring CMSM controller CMSM Controller L N L Live in Neutral in Live to...

Page 17: ...0 Wiring Diagrams 1 2 Fig 15 L Fan air out Fan air in SPEED SELECT 1 2 L N 1 2 3 4 5 6 7 8 Normal Boost 1 2 3 4 5 4 5 6 ON MOTOR CONTROL A B MOTOR SUPPLY A B 220 240V 50Hz MOTOR B CONTROL P C B MOTOR...

Page 18: ...d adjust until the system is correctly balanced Note If the flow rates have been achieved with all the louvres nearly closed it may be possible to reduce the fan speed and re adjust the louvre setting...

Page 19: ...seal Fig 17 The following cleaning and disinfection routine should be conducted every 6 months to maintain the efficiency and hygiene of the unit It should be carried out by a suitably qualified pers...

Page 20: ...PPLIANCE Fig 18 4 Make a note of the connections between PCBs and motors 5 Disconnect the motor cables mains cable and boost switch cable Remove chassis and PCBs completely 6 Replace PCBs as necessary...

Page 21: ...e to the fan 5 Remove the bracket and re fit to the new fan 6 Re assemble with the new fan in reverse order ensuring the cable does not foul the fan motor Check the electrical installation for earth c...

Page 22: ...uit and Resistance to Earth Ensure all external controls are operating and are set to normal running Ensure that a mains electrical supply is available to the unit Refer to diagrams below to identify...

Page 23: ...problem drive PCB Replace fan drive PCBs NO YES Did this solve the problem Replace fans FINISH If the either fan does not rotate check the entire system and unit for correct installation Check all du...

Page 24: ...372737 Heat exchanger seals 4 off 372739 Outer door cover assembly Optional extras 370254 Humidity sensor HS6 370495 Normal boost switch NBSW 370278 Normal boost pull cord switch PCSW 2 3 4 5 6 7 8 9...

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