Instruction Manual
D200160X012
4195K Controllers
July 2018
14
Vent
WARNING
Personal injury or property damage could result from fire or explosion of accumulated gas, or from contact with hazardous
gas, if a flammable or hazardous gas is used as the supply pressure medium. Because the controller case and cover
assembly do not form a gas‐tight seal when the assembly is enclosed, a remote vent line, adequate ventilation, and
necessary safety measures should be used to prevent the accumulation of flammable or hazardous gas. However, a remote
vent pipe alone cannot be relied upon to remove all flammable or hazardous gas. Vent line piping should comply with local
and regional codes and should be as short as possible with adequate inside diameter and few bends to reduce case pressure
buildup.
CAUTION
When installing a remote vent pipe, take care not to over‐tighten the pipe in the vent connection. Excessive torque will
damage the threads in the connection.
If a remote vent is required, the vent line must be as short as possible with a minimum number of bends and elbows.
Vent line piping should have a minimum inside diameter of 19 mm (3/4 inches) for runs up to 6.1 meters (20 feet) and
a minimum inside diameter of 25 mm (1 inch) for runs from 6.1 to 30.5 meters (20 to 100 feet).
The vent must be protected against the entrance of any foreign material that could plug it; or if a remote vent is not
required, the vent opening in the case must be protected against the entrance of any foreign material that could plug
it. Check the vent periodically to be certain it is not plugged.
