CALIBRATION
The switch is factory-set to operate at the pressure specified by the
purchaser. It may, however, be adjusted within its adjustable range.
Refer to Product Specifications (see page 7) for adjustable ranges.
WARNING: Electrical power must be disconnected prior to chang-
ing pressure settings. Damage to equipment and/or injury to per-
sonnel may result.
1. To change the pressure switch set point, remove the weathertight
cover from the housing.
2. Use a
3
⁄
4
in. open-end wrench to turn hex adjusting nut clockwise to
increase set point; counterclockwise to decrease set point.
Approximate set point can be obtained by sighting across top of
adjusting nut to calibration scale on interior wall of housing.
Note:
If precise set point is required, it will be necessary to use a
regulated pressure source, a suitable continuity tester and a
1
⁄
4
%
test gauge.
3. Replace housing cover and gasket to ensure weathertightness.
MAINTENANCE AND REPAIRS
Pressure switches do not normally require periodic service. If a pres-
sure switch leaks or malfunctions, take it out of service immediately.
Do not attempt to repair, modify or changeout wetted parts. Repairs
or modifications should be made by Advanced Specialty Gas
Equipment Corp. who have the special tools, test equipment and
trained personnel required to make a safe repair. Contact your
Advanced Specialty Gas Equipment Distributor to arrange for repair.
Warranty Repairs
are only available through Advanced Specialty Gas
Equipment Corp., and will be performed at no charge for parts and
labor. For information on warranty, see the last page of this instruc-
tion booklet.
Non-Warranty Repairs
are available through your distributor. Upon
receipt at the factory, the pressure switch will be inspected and you
will be contacted by your distributor with a repair cost estimate. No
item will be repaired until approval is received. There will be an eval-
uation charge assessed for equipment not repaired.
6
