SOR RT Nuclear Qualified Temperature Switch - Manual (Page 3)

Form 1473 (05.13) ©SOR Inc. 3/4
Mounting Hardware Fasteners per SOR Test Report 9058-102 consist of two 1/4-20,
Grade 5 screws (not supplied). Torque screws to 70 to 85 in-lbs.
Maintenance Replace cover gasket (SOR P/N 8923-181) whenever cover is removed or
minimum of once every 5 years, whichever comes first. Remove the four cover screws.
Remove old gasket. Place new gasket between housing and cover. Line up holes in cover,
gasket and housing. Insert the 4 screws and torque each to 7 to 10 in-lbs.
Store switch in a dry area in the original shipping package. Shelf life is 10 years for a
maximum ambient temperature of 80°F, based on aging data in SOR Test Report 9058-102.
Refer to applicable drawing for mounting dimensions of specific model number. The
vent connection must be plugged or vented to dry atmosphere as required by application
requirements.
Direct Mount
Line mount or mount to a rigid mounting surface with process connection down (6
o’clock). If the switch must be removed from a thermowell, loosen the process connection
by placing a 1-1/4” wrench on the hex adjacent to the process threads. Do not use wrench
on the sensing body. (See drawings.)
Installation
Site Storage
Electrical Connection
Temperature Temperature
Conduit should be
installed without
applying strain to the
housing. Screw terminal
block is provided with
marked insulation as
denoted below. Tighten
screw terminals to
10 in-lbs. (1.1 N-M)
SPDT DPDT