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3.5 Electrical connections 

 
 
The appliance must be earthed. All wiring must confirm to BS 7671: Latest edition IEE wiring 
regulations. 
 
This appliance is suitable for 230v ~ 50Hz single phase supply fused at 3 amps. 
 
This appliance is supplied with a mains flexible cable (PVC sheathed, 6-core 0.75mm

2

). 

 
A double pole switch having a minimum contact separation of 3.0mm must be used to provide 
isolation for the unit. 
 

Switch Positions 

Function 

Low    

(R1 / Low) 

100% adjustable 

Medium  

(R2 / Med) 

100% adjustable 

High    

(R3 / High) 

100% adjustable 

Remote Switch Positions 

 

(R4) 

100% adjustable 

(R5) 

100% adjustable 

 
Upon installation the fans should be started in High Speed mode to ensure optimum performance 
of the fans and switched to the required continuous ventilation setting. 
 
The fan speed control must not be mounted above or within1m of the cooker where it could be 
affected by excessive heat or moisture.  
 
 
 
Wiring diagram 
 
A five speed control switch (3 x manual, 2 x external sensors) is supplied.  Each fan speed must 
be adjusted to suit dwelling on installation (R1-Low/R2-Med/R3-High). 
Any optional external sensors, i.e.: CO

2

, Humidity, Timer/Clock, Motion/PIR must also be 

adjusted when connected (R4, R5). 
 
Suggested set points are shown for general purpose ventilation (trickle, medium, purge) which 
enable manual boost for purge (maximum) ventilation and/or override of external sensors when 
fitted. 
 
 
 
 
 
 

10 

Summary of Contents for Duplexvent DV72

Page 1: ...r Manual Commissioning Data to be completed by the installer Date of installation Configuration Left Hand Right Hand Product Serial No Important This multi speed unit requires Air Flow Rates to be adj...

Page 2: ...ts 6 3 4 Connecting condensation drain 6 3 5 Electrical connections 10 3 6 Installation diagram Fitting the unit 12 4 User Maintenance 13 4 1 Cleaning the filters by user 13 4 2 Cleaning the heat exch...

Page 3: ...enters the home at a comfortable level In exceptionally cold weather or winter conditions it is possible that the exchanger may freeze due to sub zero cold incoming air Therefore the unit must be site...

Page 4: ...e position of the condensation drain at the bottom of the unit See figure 3 on page 4 Using the stand off feet screws and plugs supplied fit the unit vertically either in a kitchen cupboard or on a wa...

Page 5: ...allation 3 Fitting the HR unit The mounting plate of the HR unit can be fitted directly to the wall or joists with the screws plugs and stand off feet provided Ensure that there is enough space for th...

Page 6: ...l as the exhaust system does not exceed 100 Pascal A No exhaust duct too close to the air inlet B Inlet duct from roof C Outlet duct from roof D HR unit E Ducts from and to the house F Condensation dr...

Page 7: ...slide the heat exchanger out from the housing 3 Determine what side you want the condensate drain to be see figure 3 for left and right hand positioning If mounting the unit vertically the condensate...

Page 8: ...the condensation drain Now use a 20mm core drill bit to drill a clean hole at this point ensuring all the debris is removed 5 Screw the condensation fitting as shown and silicone seal to create a wat...

Page 9: ...pipe Condensation drain 22mm standard PVC Important Note The unit can only be mounted horizontally with an additional condensation kit This unit is not suitable for ceiling suspended installation For...

Page 10: ...pon installation the fans should be started in High Speed mode to ensure optimum performance of the fans and switched to the required continuous ventilation setting The fan speed control must not be m...

Page 11: ...Figure 4 Electrical Diagram 11...

Page 12: ...by pulling the casing straight forward 4 Unscrew the four forward protruding studs and keep safely 5 Stand unit upright to separate the metal wall mounting plate from the bottom half of the casing Pu...

Page 13: ...be used without filters 4 1 Cleaning the filters by user 1 2 Switch off the power supply Remove the filters Remove front panel Remove filter covers 3 4 Vacuum the outside of the filters After cleanin...

Page 14: ...at exchanger with not to damage the rubber seals warm soapy water Use a sterilizing agent to sterilize The fans must be cleaned if they are dirty Be sure not to bend the blades of the fan since this c...

Page 15: ...issible duct system resistance Pa 100 Pa at 200 m3 h Maximum flow Free Discharge 280 m 3 hr 78 l sec Low and Medium flow and optional sensor inputs 0 100 adjustable on each speed Set on installation D...

Page 16: ...ction year and the name of the part Example Appliance type DV72 Serial number Year of production 2010 Part No 9041322 Part required Replacement Filters 2 9041511 Type and serial number are printed on...

Page 17: ...h Wycombe HP12 3QP Telephone 01494 525252 Website www airflow co uk Original Manufacturer if different First Year of Manufacture 2010 Last Year of Manufacture Testing Body BRE Date of test 22 03 2010...

Page 18: ...hen 4 additional wet rooms 100 Variable 0 93 88 Yes Kitchen 5 additional wet rooms 100 Variable 1 06 87 No These figures are entered into either a In the case of SAP software amended to SAP 2005 versi...

Page 19: ...005 version 9 80 the SAP Q MVHR Calculation Spreadsheet v9 80 and the results from the spreadsheet into the Special Features part of the SAP 9 80 software They must NOT be entered directly into SAP 20...

Page 20: ...sex Business Park High Wycombe Buckinghamshire HP12 3QP T 44 0 1494 525252 Visit airflow com Description of equipment Mechanical Heat Recovery Ventilation Unit Relative EC Council Directives 2004 108...

Page 21: ...calendar month and if it was not collected it would be subsequently delivered by Airflow and a delivery charge will be made 5 Has been installed in accordance with the latest Building Regulations and...

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