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Ventam 85, Installation & Commissioning Instructions, Page: 6 / 8

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Ventam 85 Installation & Commissioning Instructions Download Page 6

Page 6 of 8 
© Ventam Systems Ltd 

 
 

Control Schematic

 

 

 

 

 

  
 
 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 
 
 
 

 
 

   

 
 
 

 
 
 

 

 

 

 

 

 

 

 

 

Flow Sensor 

Status signal

 

Air Flow 

 

240vac 

signal to 
Isolation 

valve 

 

Plastic  tubing 

 

Fan 

Extract fan 
isolator or 
speed 
controller 

 

 

Gas 

proving 

Valve 

Gas Flow 

 

Extract 

Duct 

 

VENTAM 

85 

CONTROL 

SYSTEM 

 

 

Air Flow pressure 

switch mounted 

adjacent to each 

fan. 

Com■ 
 
N/O   ■             -ve

 

Summary of Contents for 85

Page 1: ...e the main gas isolation valve has opened if the gas pressure subsequently falls below a pre set level 60 of line pressure or a fan is turned off the main gas valve will close Each time a fan is turned off OR an emergency stop is depressed OR the line gas pressure falls too low the system MUST BE GAS PROVED AGAIN 3 Ventam 85 Interlock Panel Location Install the Ventam 85 Interlock Panel adjacent t...

Page 2: ...ressure switch unit to the ductwork connector Pressure switch tubing must slope down continuously from the pressure switch to the ductwork to allow condensate to naturally drain from the pipe work to prevent blockages occurring Twists loops and kinks are not permitted in the pressure switch tubing The pressure switch unit location must allow 600mm clearance to the front and 150mm below for access ...

Page 3: ...l Install cables to suit the valve size between the Ventam 85 Control Panel and the Gas Valve Re set the Emergency Stop on the Control Panel by turning the button in the direction of the arrows on the button Ensure it is safe to start fan s Check all panel terminations are secure Use the correct tool and do not over tighten Ensure that the following factory installed terminal links are fitted if n...

Page 4: ...gency stop button panel will indicate Emergency Stop Re set additional emergency stop button on the front of panel Repeat step 11 7 for each additional emergency stop button fitted 12 0 Gas Proving check that gas cannot come on if fans are off Turn off one of the fans Fan s off lamp and Gas Off lamp will be lit Operate the Gas Power Switch by switching it to the right Depress the Start Gas Proving...

Page 5: ... the fan will run and this will prevent user problems and premature fan failure A typical installation requires that the fresh air supply flow is at 85 of the extraction air flow and this can be allowed for in fan pressure switch adjustments to control minimum 14 4 Using a current monitor to monitor the fan s A current monitor may be used instead of a fan pressure switch to check that the fan is o...

Page 6: ...w Sensor Status signal Air Flow 240vac signal to Isolation valve Plastic tubing Fan Extract fan isolator or speed controller Gas proving Valve Gas Flow Extract Duct VENTAM 85 CONTROL SYSTEM Air Flow pressure switch mounted adjacent to each fan Com N O ve ...

Page 7: ...x outlet plate adj to valve 6 Panel provides a switched 240Vac supply to operate the gas isolation valve 7 Panel should be mounted in an accessible position approx 1 6m AFFL One line diagram for electrical first fix Note 6 Note 2 Note 3 Note 3 Supply Air Fan Flow Sensor next to fan Canopy Extract Air Fan Flow Sensor next to fan Ventam Systems Ltd Unit D4 Seedbed Business Centre Vanguard Way Shoebu...

Page 8: ...rminals 3 Terminal 20 MUST NOT BE USED 4 Dungs gas pressure switch connections Terminal 2 normally open terminal 3 Common 5 Please phone 01702 382 307 if assistance is required L N E Incoming panel supply 240volt ac 2 3 N O C EXTRACT FAN PRESSURE SWITCH 2 3 N O C INLET FAN PRESSURE SWITCH ADDITIONAL EMERGENCY STOP BUTTON 3 2 C N O E GAS VALVE PRESSURE SWITCH E N L MAIN GAS VALVE 1 2 L N E GAS BYPA...

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