46-624 Series 3 Liquid Level Switches ASME B31.1 Construction
7
5. The switch terminals are located next to the conduit outlet
to facilitate wiring. Bring supply wires through conduit
outlet. Route extra wire around enclosing tube under the
baffle plate and connect them to the proper terminals.
Refer to the wiring diagram in your switch bulletin for this
information. Refer to chart below for switch instruction
manual numbers.
NOTE: For models with a Series HS switch with high temperature
lead wire, the leads are routed out through the conduit open-
ing by the factory. A suitable conduit box should be provided
for the connection of the leads to the control wiring.
6. Dress wiring to ensure no interference or contact with
actuation of switch, or replacement of switch housing
cover.
OBSERVE ALL APPLICABLE ELECTRICAL CODES
AND PROPER WIRING PROCEDURES.
Prevent moisture seepage into the enclosure by installing
approved seal-drain fittings in the conduit run leading into
the unit.
Caution:
In hazardous areas, do not power the unit until the
conduit is sealed and the enclosure cover is screwed
down securely.
7. Replace housing cover.
8. If control has been furnished with an explosion proof or
moisture proof (gasketed) switch housing, it must be
sealed at the conduit outlet with a suitable compound or
non-hardening sealant to prevent entrance of air.
9. Test switch action by varying liquid level in float chamber.
NOTE: If switch mechanism fails to function properly, check vertical
alignment of control housing and consult installation bulletin
on switch mechanism furnished.
10. Check cover-to-base fit to be certain that gasketed joint is
tight. A positive seal is necessary to prevent infiltration of
moisture-laden air or corrosive gasses into switch housings.
Switch Series
Description
Bulletin
Letter
No.
B, C, D
Dry Contact Switch
42-683
F, 8, 9
High Temperature Hermetically Sealed
Snap Switch
42-799
HS
Hermetically Sealed Snap Switch
42-694
R
High Temperature Snap Switch
42-799
J
Bleed Type Pneumatic Switch
42-685
K
Non-Bleed Type Pneumatic Switch
42-686
