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AMC-1H
AMBIENT-SENSING THERMOSTAT FOR HAZARDOUS LOCATIONS INSTALLATION INSTRUCTIONS
THERMAL MANAGEMENT SOLUTIONS
EN-DigiTraceAMC1H-IM-H56911 01/13
R
DESCRIPTION
The AMC-1H thermostat is designed for controlling freeze-
protection heat-tracing circuits in hazardous locations. The
thermostat responds to ambient temperature changes. The
AMC-1H can be used to control a heat-tracing circuit directly (see
Figure 1 on back page) or it can be used to control a contactor coil
(see Figure 2).
APPROVALS
Class I, Div. 1 and 2, Groups B, C, D
Class II, Div. 1 and 2, Groups E, F, G
Class III
Hazardous locations
SPECIFICATIONS
Enclosure
NEMA 4, 7, 9, lacquer-coated cast-aluminum
housing, stainless-steel hardware
Entries
One 3/4 in. NPT conduit hub
Set point range
15°F to 140°F (–9°C to 60°C)
Sensor exposure
limits
–40°F to 160°F (–40°C to 71°C)
Housing exposure
limits
–40°F to 140°F (–40°C to 60°C)
Switch
SPDT
Electrical rating
22 A at 125/250/480 Vac
Accuracy
±6°F (±3.3°C)
Deadband
2°F to 12°F (1.1°C to 6.7°C) above actuation
temperature
Set point
repeatability
±3°F (±1.7°C)
Sensor type
Fluid-filled (silicone) bulb and 9 ft (2.7 m)
capillary
Sensor material
300 series stainless steel
Connection
terminals
Screw terminals, 10–14 AWG (2–5 mm
2
)
This component is an electrical device. It must be installed
correctly to ensure proper operation and to prevent shock or
fire. Read these important warnings and carefully follow all the
installation instructions.
Component approvals and performance are based on the use of
specified parts only. Do not use substitute parts or vinyl electrical
tape to make connections.
WARNING:
4.0 w (102 mm)
1.2 in (30 mm)
2.0 in
(50 mm)
3⁄4 in NPT
conduit entry
Terminal
block
0.3 in (9 mm)
4.0 in (102 mm)
4.5 in (114 mm)
Ø.28 in (7 mm)
mounting
hole (4X)
4.5 in
(114 mm)
6.6 in
(168 mm)
4.0 in
(102 mm)
8.0 in
(202 mm)
Adjusting
knob
Removable
knob cover