NELSON™ HEAT TRACING SYSTEMS
SPECIFICATION / APPLICATION
TA4X140 THERMOSTAT
DESCRIPTION
These thermostats are used for ambient temperature
control in ordinary or corrosive locations.
ENCLOSURE
Die Cast Aluminum
CLASSIFICATIONS
NEMA Type 4X IP66
TEMPERATURE RANGE
Range
-9 to 60°C (15 to 140°F)
CAPILLARY
Length Material Max. Bulb Temperature
N/A Stainless Steel 71°C (160°F)
ELECTRICAL DATA
CSA Rating UL Rating
22 amp resistance 480 VAC 22 amp resistance 480 VAC
CALIBRATION ACCURACY
1.1°C (2°F)
SWITCH TYPE
Single Pole Double Throw
OUTLINE
124mm (4.9")
114mm (4.5")
102mm (4")
102mm (4")
114mm (4.5")
142mm (5.6")
203mm (8")
D.C. AMPS
A.C. AMPS
R
SWITCH NUMBER
MEDIA TEMPERATURE LIMITS
ADJUSTABLE RANGE
6V 12V 24V 125V 250V
125V 250V 480V 600V
TEMPERATURE INDICATING AND
REGULATING EQUIPMENT.
LISTED 266T
F
C
0
50 100
TEMP
SW
TYPE 4
F
50
C
Annual Maintenance:
1. Remove Cover.
2. Lubricate dial stem and spray a coat of lubricant and rust preventative such as CRC Stor & Lube,
electrical grade, on the thermostat body.
3. Replace Cover.
Approvals:
General Locations
UL - E89748 CSA - LR701949 CE
26mm (3")
20mm (.81")
10mm (.38")
29mm (0.16")
P.O. BOX 726 TULSA, OK 74101 TEL 918-627-5530 FAX 918-641-7336 www.nelsonheaters.com
GA-1990 Rev. 3
August, 2005
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