NELSON™ HEAT TRACING SYSTEMS
SPECIFICATION / APPLICATION
TA4X140 THERMOSTAT INSTALLATION
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
C
50
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
NELSON™ HEAT TRACING SYSTEMS
SPECIFICATION / APPLICATION
TA4X140 THERMOSTAT INSTALLATION
INSTALLATION
Junction Box
Sensing Bulb
Stand-off
Conduit to
Thermostat
Thermostat
WIRING DIAGRAM
Low Point Drain
Power Supply
MI Cold Section
DIRECT CONTROL
Pipe Clamps
Method for installing LT, HLT,
CLT and NC heater cable types.
Pipe
LOW TEMP. ALARM
Phase
Heater
C
NO
NC
Phase
Alarm
(low temperature)
C
NO
NC
Nelson Heat Tracing Systems products are supplied with a limited warranty. Complete Terms and Conditions may be found on Nelson's website
www.nelsonheaters.com.
at
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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