NELSON™ HEAT TRACING SYSTEMS
SPECIFICATION / APPLICATION
TF4X40 THERMOSTAT INSTALLATION
DESCRIPTION
These thermostats are used for controlling heat tracing
systems in ordinary locations. The capillary bulb should
be mounted on the side of the pipe.
OUTLINE
ENCLOSURE
Molded Fiberglass Polyester
CLASSIFICATIONS
NEMA Type 4X IP66
TEMPERATURE RANGE
Fixed Range
4.4°C (40°F)
CAPILLARY
Length Material Max. Bulb Temp.
0.9m (3ft.) Copper 71°C (160°F)
ELECTRICAL DATA
CSA Rating UL Rating
22 amp Resistance 480VAC 22 amp Resistance 480VAC
CALIBRATION ACCURACY
2.2°C (4°F)
SWITCH TYPE
Single Pole Single Throw
38mm (1.5")
ø 1 1/8 Hole for .75" NPT Conduit Hub
25mm (1.0")
5mm (1/5") 2 pls
ø 10mm (3/8")
80mm (3 1/8")
4
ø 2mm (1/16")
83mm (3.25")
ø 6mm (.25") Mounting Hole, 2 pls
14mm (4.5")
133mm (5.25")
Two awg #14 Stranded 12" long
common - purple / NC - blue
Annual Maintenance:
1. Remove cover.
2. 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 - E50023 CSA - LR52088-4 CE
64mm (2.5")
P.O. BOX 726 TULSA, OK 74101 TEL 918-627-5530 FAX 918-641-7336 www.nelsonheaters.com
GA-2240 Rev. 6
November 2007
NELSON™ HEAT TRACING SYSTEMS
t
SPECIFICATION / APPLICATION
TF4X40 THERMOSTAT INSTALLATION
INSTALLATION
Junction Box
Capillary
Thermosta
Low Point Drain
Power Supply
MI Cold Section
Conduit to
Thermostat
Stand-off
Pipe Clamps
Method for installing LT, HLT,
CLT and NC heater cable types.
!
WARNING:
Do not mount sensing
bulb near heater cable.
Pipe
Fiberglass Tape
Sensing Bulb
WIRING DIAGRAM
Power Supply
Heater Cable
Nelson Heat Tracing Systems products are supplied with a limited warranty. Complete Terms and Conditions may be found on Nelson's website at
www.nelsonheaters.com.
P.O. BOX 726 TULSA, OK 74101 TEL 918-627-5530 FAX 918-641-7336 www.nelsonheaters.com
GA-2240 Rev. 6
November 2007
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