Ventam 85 Installation & Commissioning Instructions Download Page 1

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© Ventam Systems Ltd 

         

 

 

 

 
 
 
 

Ventam 85 Installation & Commissioning Instructions 

 

General 

The  Ventam  85  is  a  combined  Gas  Proving  and  Ventilation  Interlock  Panel,  to  enable 
compliance with BS 6173. 
 

Current Electrical and Gas Regulations must be adhered to at all times and all Gas Proving & 
Interlock  Systems  must  only  be  installed  and/or  maintained  by  competent  and  approved 
persons.       Attention is drawn in particular to Regulations relating to isolation and de-isolation 
of Gas and Electrical Systems.  All these instructions should be read before installation.  Refer 
to wiring diagrams provided as required.

 

 
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Principle of operation 

The Ventam 85 Interlock & Gas Proving System is comprised of three units: 
 

Ventam 85 Control Panel. 

 

Fan Air Flow pressure switch(es). 

 

Gas Isolation and weep by-pass valve assembly. 

 

The Ventam 85 Panel is mounted in the kitchen where it is accessible and visible to the user. 

 

The  Ventam  85  System  prevents  the  gas  proving  system  being  operated  UNTIL  the  fans  are 
operating.    Only  then  can  Gas  Proving  commence.    IF  there  are  gas  leaks  or  if  valves  have 
been left open at the appliances the main gas valve WILL NOT OPEN. 
Once 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. 
 

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Ventam 85 Interlock Panel Location 

Install  the  Ventam  85  Interlock  Panel  adjacent  to  the  emergency  exit  and  at  an  elevation 
suitable for the users to reach the panel controls. 
The panel must not be located where access to it may be obstructed 

– e.g. by placing it behind 

an opening door or where it may be obstructed by mobile trolleys, hanging clothing or similar. It 
should  not  be  located  where  the  shut-off  button  could  be  operated  accidentally.    Mount  the 
panel on a flat level surface. 
The Interlock panel must not be located adjacent to or above sources of heat, vapour or steam, 
e.g. beside or above a cooking range or cooking or washing appliances. 
The panel location must allow 600mm clearance to the front and 150mm clearance on all sides 
for access and maintenance.

 

 

Panel power Supply 

The  panel  must  be  supplied  by  a  240Vac  five  Amp  single-phase  earthed  supply,  via  a  fused 
spur or suitable isolator. 

 
 
 
 

Ventam Systems Ltd 
Unit D4  Seedbed Business Centre 
Vanguard Way 
Shoeburyness 
Essex SS3 9QY 
Phone  01702 382 307 
Fax       01702 382 340 

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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