Installation - Hoffer Flow Controls HIT-4U User Manual

Flow-Tech, Inc. | In MD 410-666-3200 - In VA 804-752-3450 | www.flowtechonline.com

3. INSTALLATION

Warning: Do not open explosion-proof enclosure while
circuits are powered in hazardous locations.
Field wiring connections
All field wiring connections should be made using shielded cables.
The shield should be connected to the chassis ground lug on the HIT-
4U enclosure. The shield on the opposite end of the cable should be left
open. Connections are made to the HIT-4U terminal blocks using wire
gauges 26-16 AWG, tightening Torque 0.22 to 0.25Nm.
Accessing terminal block connections
Ex Enclosure:
1. Loosen the locking set screw using a 1/16" hex key (Allen
wrench) and unscrew the cover of the enclosure counter-
clockwise until it separates from the body of the enclosure.
2. Remove two #4-40 x 3/8" pan head screws from the front
panel by turning counter-clockwise.
3. Lift the display assembly from the enclosure. Terminal blocks
are on the bottom.
NEMA Enclosure:
1. Loosen, by turning counter-clockwise, the screws in each
corner of the enclosure cover to remove.
2. Remove four #4-40 thumb screws from the front panel by
turning counter-clockwise.
3. Lift the display assembly from the enclosure. Terminal blocks
are on the bottom.
Making connections to terminal blocks
1. Use a small flat blade screwdriver and turn counter-clockwise
to loosen the proper terminal screw.
2. Insert wire (26-16 AWG) and turn terminal screw clockwise to
tighten.
3. Lightly pull on wire to ensure proper connection.
HIT-4U
Installation 11
HP-327