© 2020, Gast Manufacturing
We reserve the right to make any alterations which may be due to any technical improvements
Printed in the USA
5
Part No. 70-6856 (Rev. A)
PRESSURE SWITCH
Installation Use wrench to install .(Do not twist housing to
install .)
Connecting
Please follow the above wiring method to correct
the wiring . please check the connection before
the power .
Set
Zero
clearing
After power, without pressure, close
the ‘run’ key, long press ‘
q
’ key for 5
seconds to zero clearing .
Units
change
Close ‘run’ key, short press ‘
p
’ key to
change pressure unit circularly
Upper and
lower limit
setting
Close ‘run’ key, short press ‘set’
key, it shows lower limit pressure
and the low pressure warning light
comes on; press ‘
p
’’
q
’ to change
the figure(long press, the figure
changes quickly), after setting, short
press ‘set’ key to save setting . Then it
shows upper limit and high pressure
warning light comes on, press ‘
p
’’
q
’
to change the figure(long press, the
figure changes quickly), after setting,
short press ‘set’ key to save setting
and quit automatically . (if the lower
limit can not reach to the figure you
want, you can set upper limit firstly .)
Run
After setting, short press ‘run’ key to
open . (The ‘run’ key must be closed
before setting)
MAINTENANCE
WARNING
Electrical Shock Hazard
Disconnect electrical power supply before performing
maintenance on this product.
If product is hard-wired into system, disconnect electrical
power at the circuit breaker or fuse box before
performing maintenance on this product.
Failure to follow these instructions can result in death, fire,
or electrical shock.
WARNING
Injury Hazard
Product surfaces become very hot during operation,
allow product surfaces to cool before handling.
Air stream from the product may contain solid or liquid
material that can result in eye or skin damage, wear proper
eye protection.
Clean this product in a well-ventilated area.
Failure to follow these instructions can result in burns,
eye injury, or other serious injury.
It is your responsibility to:
• Regularly inspect and make necessary repairs to product
in order to maintain proper operation.
• Make sure that pressure is released from product before
starting maintenance.
Check intake and exhaust filters after six months of operation .
Clean filters and determine how frequently filters should be
checked during future operation . This one procedure will help to
assure the product’s performance and service life .
1 . Remove filter cover .
2 . Check filter felt . Replace felt if it is covered with
contamination or shows signs of increasing differential
pressure .
3 . Reinstall felt and filter cover .
