IMT120 15
3
TO PREVENT IGNITION OF HAZARDOUS ATMOSPHERES,
SEAL CONDUIT RUNS WITHIN 18” OF ENCLOSURE.
ENSURE ELECTRICAL CONDUIT ENTRIES ARE
PROPERLY SEALED TO PREVENT MOISTURE ENTRY.
❶
Remove cover and wire device (See Figure 2).
❷
Wire directly to the terminal block. An internal grounding
terminal is located near the right-hand conduit opening.
❸
Replace cover and hand tighten to fully engage cover O-ring.
TO PREVENT SEIZURE OF ENCLOSURE COVER, DO NOT
REMOVE LUBRICANT FROM THREADS. THREADS SHOULD
ALSO BE FREE OF DIRT AND OTHER CONTAMINANTS.
Part II - Adjustments
•
3/16 Open End Wrench (2)
•
1/4 Open End Wrench
•
5/64 Allen Wrench
•
5/16 Open End Wrench (2 required for 822E only)
AFTER COMPLETING SETTING ADJUSTMENT ON
B121, B122, E121 & E122, BE SURE TO RE-INSTALL
ADJUSTMENT COVER.
For set point adjustment and re-gapping (if necessary),
connect device to a calibrated temperature source.
Types C120, F120
❶
Remove cover
❷
Adjust set point by holding plunger with 3/16” open end
wrench and turning the calibrating screw with another 3/16”
open end wrench (see fi gure 3).
❸
Turn clockwise to increase setting or counter-clockwise to
decrease setting.
Types B121 and E121
❶
Remove adjustment cover.
❷
Adjust set point by turning external knob and pointer to
desired setting on scale (see fi gure 4).
Types B122 and E122
Individual switches may be set together or separately
by up to 100% of range. The front (low) switch should
never be set higher than the rear (high) microswitch.
Turning external knobs will increase or decrease each
switch setting independently (see fi gure 4).
Figure 2
SPDT
DPDT
2SPDT
ORN YEL
RED
BLU
VLT
BLK
N.C.
N.O.
COM.
N.C.
N.O.
COM.
N.C.
N.O.
COM.
N.C.1
N.C.2
N.O.1
N.O.2
COM. 1
COM. 2
RED
YEL.
ORN.
N.C.
N.O.
COM.
N.C.
N.O.
COM.
#1
#2
NC NO
NC NO
SWT#2
SWT#1
BLK
VLT RED
YEL
BLK
ORN
COM
COM
PLUNGER
Types B121, C120,
E121, F120, 820E,
also for option 1180
Types B122, E122
Options 1010, 1190,
1195 (for types B121,
C120, E121, F120
only)
Type 822E
PLUNGER
NOTE
REVERSE
WIRING OF
LOW SWITCH
HIGH TERMINAL BLOCK
LOW TERMINAL BLOCK
HIGH SWITCH
(BACK)
LOW SWITCH
(FRONT)
CALIBRATING
SCREW 3/16
PLUNGER
3/16
Figure 3
Figure 4
EXTERNAL KNOB AND
POINTER ADJUSTMENT
Figure 2
Figure 3
