Pentair RAYCHEM AMC-1A User manual

Ambient-sensing thermostAt for nonhAzArdous locAtions instAllAtion instructions
AMC-1A
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R
Description
The AMC-1A thermostat is designed for controlling freeze
protection heat-tracing systems in nonhazadous locations. The
thermostat responds to ambient temperature changes. The
AMC-1A 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
specificAtions
Enclosure NEMA 4X, polyurethane-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 160°F (–40°C to 71°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 Fixed fluid-filled (silicone) bulb and capillary
Sensor material 300 series stainless steel
Connection
terminals
Screw terminals, 10–14 AWG (2–5 mm2)
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:
1.2 in
(30 mm)
3⁄4 in
NPT conduit entry
3.0 in (76 mm)
0.3 in
(9 mm)
0.8 in
(20 mm)
Terminal
block
Ø.28 in (7 mm)
mounting holes (2X)
4.0 in
(102 mm)
4.5 in
(114 mm)
5.6 in
(142 mm)
4.9 in (124 mm)
4.5 in (114 mm)
4.0 in (102 mm)
8.0 in
(202 mm)
Adjusting
knob
Removable
knob cover

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to change specifications without prior notice.
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Figure 2. Controlling a contactorFigure 1. Heat-tracing control
CNO NC
For switching heat-tracing loads greater than 22 A
or switching multiple heat-tracing circuits.
Ø
G
G
N
ØØ
Power
connection
Control
thermostat
Control
thermostat
GFEPD
Power Supply Power Supply
C
C
NONC
NONC
or 208-V or 240-V supply - 240 -V heating cable ØC
G
C
NANBNCØB
ØA
120-V or
277-V
coil
Braid
Braid
GFEPD
Heating
Cable A
Heating
Cable B
Heating
Cable C
Heating
Cable
120-V supply – 120-V heating cable
277-V supply – 240-V heating cable
120-V supply – 120-V heating cable or
277-V supply – 240-V heating cable
Wiring
instAlling the thermostAt
1. Verify that the thermostat is suitable for the area where it is to
be installed.
2. Check the line voltage and the
heat-tracing load to ensure that
the thermostat ratings are not
exceeded.
3. Mount the unit in a position that
prevents condensation from
draining into the enclosure from
the connecting conduit (see diagram above).
positioning
4. Mount ambient-sensing units in the area exposed to the
coldest temperature and the most wind. Do not mount on the
side of a warm building or in a location that is exposed to warm
air currents or direct sun light.
setting AnD ADjusting
5. Set the thermostat dial to the desired temperature and finish
wiring.
Conduit
drain