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3903002     06.16

Symbol Legend

The following terms are used throughout this manual to bring 
attention to the presence of potential hazards, or to important 
information concerning the product.

DANGER:

  Indicates an imminent 

hazardous situation which, if not 
avoided, will result in death, serious 
injury or substantial property damage.

WARNING: 

 Indicates an imminent 

hazardous situation which, if not 
avoided, may result in personal injury 
or property damage.

How to use this manual

 

This installation manual does not contain any system design 
documentation. System design documentation is available 
from any authorized ENERVEX representative. Accessories, 
fans, and variable frequency drives are not covered by this 
manual. Please refer to these component’s individual manuals.

TO REDUCE THE RISK OF FIRE, 
ELECTRICAL SHOCK OR INJURY TO 
PERSONS, OBSERVE THE FOLLOWING:

1. Use this unit in the manner intended by the manufacturer.  

If you have questions, contact the manufacturer at the 
address or telephone number listed on the front of the 
manual.

2. Before servicing or cleaning the unit, switch off at service 

panel and lock service panel to prevent power from being 
switched on accidentally.

3. Installation work and electrical wiring must be done by a 

qualified person(s) in accordance with applicable codes 
and standards.

4. Follow the appliance manufacturer’s guidelines and safety  

standards such as those published by the National Fire 
Protection Association (NFPA), and the American Society 
for Heating, Refrigeration and Air Conditioning Engineers 
(ASHRAE), and the local code authorities.

5. This unit must be grounded.

!

Summary of Contents for 3903002

Page 1: ...n Operating Manual ENERVEX OPS OVER PRESSURE SWITCH ENERVEX Inc 1685 Bluegrass Lakes Parkway Alpharetta GA 30004 USA P 770 587 3238 F 770 587 4731 T 800 255 2923 info enervex com www enervex com READ AND SAVE THESE INSTRUCTIONS ...

Page 2: ...y this manual Please refer to these component s individual manuals TO REDUCE THE RISK OF FIRE ELECTRICAL SHOCK OR INJURY TO PERSONS OBSERVE THE FOLLOWING 1 Use this unit in the manner intended by the manufacturer If you have questions contact the manufacturer at the address or telephone number listed on the front of the manual 2 Before servicing or cleaning the unit switch off at service panel and...

Page 3: ...hile the EBC 31 control unit drives the damper completely open to relieve the pressure The differential pressure acts via diaphragm against the force of setting spring on the microswitch The pressure switch operates without any auxiliary power The OPS monitors differential pressure in firing and venitlation systems The switch is suitable for air flue and exhaust gases and can be mounted in the hor...

Page 4: ...C Max Pressure 1 4 PSI 100 mbar Conduit Connection 1 4 Solderless Quick Connect Terminals Pressure Connections Two plastic tubes OD 1 4 6 0mm Weight 0 4lb 0 2 kg Housing NEMA 3 IP 54 1 2 NPT Connection COM 3 P p 1 NC 2 NO OPS Switching Function As pressure rises 1 NC opens 2 NO closes As pressure falls 1 NC closes 2 NO opens Deduct 0 08 inW C 20 Pa from the pressure setting if switch is mounted ho...

Page 5: ...g to the stack probe and the port marked P1 and IMPORTANT REMOVE THE PROTECTIVE CAP ON THE PORT MARKED P2 AND THE SWITCH WILL NOT WORK PROPERLY UNLESS IT HAS BEEN REMOVED 3 2 INSTALLATION OF STACK PROBE FOR OPS Install the stack probe for the OPS in the stack between the boiler outlet and the damper The probe must be located so the distance A is at least 3 vent diameters downstream damper The prob...

Page 6: ...oint above normal start up and transition pressures to avoid nuisance trips NOTE On applications where a positive pressure is being maintained a delay timer should be installed to avoid nuisance trips 0 8 0 2 0 0 0 72 1 80 0 64 160 0 56 140 0 4 8 12 0 0 40 1 00 0 3 2 8 0 0 24 60 0 16 4 0 0 0 8 2 0 in WC Pascal Typ 930 80 Use terminals 1 3 for Normally Closed NC 3 2 1 Fig 3 Fig 4 Set Point Indicato...

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