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B4X-15140 & B7-15140 Ambient Thermostats
FEATURES
- Ambient sensing control of electric heat tracing circuits for freeze protection of piping & vessels
- Adjustable control thermostat that can be used to control a heating circuit or as pilot control
- Certified for use in ordinary (nonclassified) areas and in potentially explosive atmospheres
APPLICATION
The B4X-15140 and B7-15140 are designed to provide
ambient sensing control of electric heat tracing
circuits for freeze protection of piping and vessels.
These adjustable thermostats can be used to
control a single heating circuit or as pilot control of a
contactor switching multiple heat tracing circuits.
B4X-15140 An epoxy polyamide coated die-cast
aluminum NEMA 4X enclosure provides watertight,
dust tight and corrosion-resistant protection to the
thermostat switch.
B7-15140 An aluminum lacquer finished die-cast
aluminum enclosure provides NEMA 4X (water
tight, dust tight, and corrosion resistant) and
NEMA 7/NEMA 9 (explosion proof) protection to the
thermostat switch. The tamper-resistant, threaded
and gasketed aluminum dial cover is externally
adjustable.
The B4X-15140 thermostat is approved for use in
ordinary (nonclassified) locations. The B7-15140 is
approved for use in both ordinary (nonclassified) and
hazardous (classified) locations.
RATINGS
Voltage rating……………………………………………..125/250/480 Vac
Switch rating……………………………………………………………… 22 amps
Switch type………………………………………………………………………SPDT 1
Electrical connection
B4X-15140 2 …………………………screw terminals on switch
B7-15140 3…………………………………………………..terminal blocks
Adjustable control range…15°F to 140°F (-9°C to 60°C)
Maximum control differential ……………………….. 6°F (3.3°C)
Set point repeatability ………………………………………..±2°F (1.1°C)
Maximum bulb exposure temperature……160°F (71°C)
Bulb dimensions……………………………9/16” x 3” (14 x 76 mm)
Bulb material …………………………………………………..stainless stee
Notes
1. See back for typical wiring diagram.
2. The B4X-15140 utilizes a ½” NPT conduit hub with an internal
grounding terminal. The external bonding terminal is not to be
used as the primary equipment grounding terminal. The internal
grounding terminal shall be used as the primary equipment
grounding means and the external grounding terminal is only
for a supplemental (secondary) bonding connection where local
authorities permit or require such a connection.
3. The B7-15140 utilizes a ¾” NPT conduit hub with an internal
grounding terminal. The external bonding terminal is not to be
used as the primary equipment grounding terminal. The internal
grounding terminal shall be used as the primary equipment
grounding means and the external grounding terminal is only
for a supplemental (secondary) bonding connection where local
authorities permit or require such a connection.
4. Date code format on nameplate is “YYWW” for year and week.
5. Zone hazardous locations flameproof gap and joint details. Activation
plunger to guide through hole gap joints: 1.105” minimum length by
0.0030” maximum annular gap. Adjustment shaft to shaft through
hole gap joints: 1.060” minimum length by 0.0030” maximum annular
gap.
6. Plug is approved explosion-proof with the product as a full assembly,
and does not carry individual markings.