Larson Electronics, LLC
Phone: (877) 348-9680
Fax: (903) 498-3364
www.larsonelectronics.com
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of
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EXP-TSTAT-125.250-60.250F-0.25-V1-15L
THERMOSTAT SUB ASSEMBLY REPLACEMENT
1.
Before removing enclosure cover, turn thermostat knob to the
OFF position (counterclockwise). Place a piece of masking
tape over the knob to keep it in the OFF position.
2.
Remove the enclosure cover by removing four fastening
screws (Figure 5).
3.
Remove the white shaft coupler for safe-keeping.
4.
Remove the thermostat mounting screws (2).
5.
Loosen the capillary-seal retaining cap set screws and then
remove the retaining cap.
Note:
Do not remove the entire capillary seal fitting from the
enclosure.
6.
Remove the capillary seals and thermostat from the enclosure.
7.
Remove the calibration cap (Figure 1) and insert pin from the
old thermostat. Rotate the position of the calibration cap, for
use in the next step.
8.
With replacement thermostat in the OFF position (shaft complete-
ly counterclockwise), install insert pin and calibration cap. Install
calibration cap with same orientation as noted in step 7 above.
9.
If excess capillary, on old thermostat, had been coiled in enclo-
sure, it may be necessary to coil an equal amount on replace-
ment thermostat per step 4D mounting instructions.
10.
After proper capillary length is obtained on replacement ther-
mostat, insert capillary in the enclosure and thru the capillary
seal fitting.
11.
Recheck for proper capillary length (external to enclosure) and
adjust if necessary.
12.
Align spacer plate and replacement thermostat to mounting
holes in the bottom of enclosure using mounting screws (2 –
#10-32 x
3
/
8
Lg.) to secure thermostat to enclosure.
13.
Slide the capillary seals into the capillary fitting making sure
the capillary is positioned in the center groove of the seals.
WARNING:
If capillary is not located in the cen-
ter groove properly, damage to the capillary will
result, rendering the thermostat inoperable or
unreliable.
14.
Replace capillary seal retaining cap and tighten set screws to
lock in position.
Note:
Per the NEC, all threaded connections in a hazardous
environment must be tightened sufficiently to engage five full
threads.
15.
Rewire replacement thermostat per appropriate wiring dia-
grams (Figures 7 thru 11).
16.
Replace the white nylon coupling on the calibration cap and
enclosure cover per step 7 of the wiring section.
17.
Replacement thermostat control should be monitored to insure
proper operation. If calibration is required, see the calibration
section for instructions.
THESE INSTRUCTIONS MAY NOT COVER ALL DETAILS OR VARIATIONS OF THIS PRODUCT FOR YOUR EQUIPMENT OR INSTALLATION REQUIREMENTS.
SHOULD FURTHER INFORMATION NOT COVERED BY THESE INSTRUCTIONS BE REQUIRED, PLEASE CONTACT LARSON ELECTRONICS BY EMAIL AT
OR BY PHONE AT
1-877-348-9680
FOR FURTHER ASSISTANCE.
PLEASE VISIT LARSONELECTRONICS.COM FOR
WARRANTY
AND
RETURN
INFORMATION.
USE AND CARE
Unauthorized modification may impair the function and/or safety of this device and could affect the life of the equipment.
Always check for damaged or worn out parts before using the device. Store it in a secure place out of the reach of
children when not in use. Inspect for good working condition prior to storage and before re-use.
REPLACEMENT PARTS
The
EXP-TSTAT-125.250-60.250F-0.25-V1-15L
is designed to provide years of reliable performance. Should the need
for replacement parts arise, please contact Larson Electronics.
