APL-9 Series Limit Switch Box
Installation Operation & Maintenance Manual
Doc No. : HumG-APL9-21 Rev0
Page 7 / 10
Valve Automation Leader HKC
7.3.1.
Un-tighten the captive cover bolts with an applicable tool. (S Driver recommended)
7.3.2.
Remove the cover carefully.
7.3.3.
Open cam setting
①
Electric power or air supply of valve actuator on to operate the
actuator fully open
②
Lift the bottom yellow cam(optional green cam) up and rotate it
until the switch is activated.
③
And then release it. Cam shall be back into a stable position by
itself.
7.3.4.
Close cam setting
①
Electric power or air supply of valve actuator off to operate the
actuator fully close
②
Push the upper red cam down and rotate it until the switch is activated.
③
And then release it. Cam shall be back into a stable position by itself.
Mechanical switches
Proximity sensors
Splined cam
7.4.
Wiring
Danger ;
HAZARDOUS VOLTAGE. No electrical power should be connected until all wiring and limit
switch adjustments have been completely.
7.4.1.
APL limit switch box enclosure feature prewired switches. All user connections are made at a
numbered terminal strip. A wiring diagram, located inside the cover, indicates which terminal numbers
correspond to switch contacts, such as normally open (NO), normally closed (NC), etc. Follow the
wiring diagram and electrical code to connect the switches to your system.
7.4.2.
Solenoid valve may also be wired through the APL enclosure. Two auxiliary terminals are included as
standard.
7.4.3.
APL limit switch box has two cable entries on the body and supply a blanking plug not a cable gland
which meet the type of protection. Cable gland shall be applied by installer or user.
Open cam
Close cam