Installation, Operation &
Application Guide
For more information on our complete
range of American-made products – plus
wiring diagrams, troubleshooting tips and
more, visit us at
www.icmcontrols.com
Installation of the ICM330 shall be performed by trained technicians only. Adhere to all local and
national electric codes.
Disconnect all power to the system before making any connections.
Caution!
•
Line voltage:
120, 208, 240, 277, and 480 VAC
•
Control voltage:
18-30 VAC
• Current:
4 amps maximum
•
Frequency:
50-60 Hz
•
Operating temperature:
-40ºF to +176ºF (-40°C to +75°C)
•
Probes:
– Temperature: Thermistor, 10K ohm at 77°F (25°C)
– Pressure: ICM380 (ordered separately)
•
Heat pump override:
24 VAC N.C. or N.O.
•
Weight:
12 ounces (341 grams)
Note:
The
ICM330
should be applied to motors and equipment that have been designated by their
respective manufacturers as capable of being speed controlled.
• Mounting:
– Surface mount using (2) #8 screws
– It is recommended that the
ICM330
be mounted away from the condenser exhaust air in order to
maintain lower operating temperatures
Specifications
ICM330
Head Pressure Control with
Optional Heat Pump Override
Regulates head pressure via temperature or pressure input
Connections for ICM330 at 120/208/240/277 VAC
1. Remove power from system.
2. Field install a wire from
Line 1
wire to
120/280 VAC
terminal.
3. Cut
Line 2
wire; affix motor side to
Motor 2
terminal and line side to
Line 2
terminal.
4. Make 24 VAC, probe and HP connections.
5. Verify wiring is correct.
6. Power up system and check operation.
Field Installed Wire
1. Remove power from system.
2. Field install a wire from
Line 1
wire to
480 VAC
terminal.
3. Cut
Line 2
wire; affix motor side to
Motor 2
terminal and line side to
Line 2
terminal.
4. Make 24 VAC, probe and HP connections.
5. Verify wiring is correct.
6. Power up system and check operation.
Connections for ICM330 at 480 VAC
Field
Installed
Wire
Connections for Heat Pump System at 480 VAC
1. Remove power from system.
2. Field install a wire from
Line 1
wire to
480 VAC
terminal.
3. Cut
Line 2
wire; affix the common from the defrost
board’s fan relay to the
Motor 2
terminal and the Line
from the contactor to the
Line 2
terminal.
4. Make 24 VAC, probe and HP connections.
5. Verify wiring is correct.
6. Power up system and check operation.
Connections for Heat Pump System at 120/208/240/277 VAC
1. Remove power from system.
2. Field install a wire from
LINE 1
wire to
120/280
VAC
terminal.
3. Cut
Line 2
wire; affix the common from the defrost board’s
fan relay to the
Motor 2
terminal and the Line from the
contactor to the
Line 2
terminal.
4. Make 24 VAC, probe and HP connections.
5. Verify wiring is correct.
6. Power up system and check operation.
Example
1. Only one probe type can be used at a time, temperature OR pressure.
2. A typical installation is shown in Appendix section. The temperature probe can
be attached to the U-bend. Use the provided thermo-tape to secure the probe
to the place of attachment.
3. When using a pressure probe, install it on the discharge line transducer fitting.
4. A temperature or pressure probe is connected to ICM330 as shown in the
respective wiring diagram below.
Installing and Connecting the Probe
Temperature Probe
BLUE WHITE GREEN
RED
BLACK
PRESSURE TRANSDUCER
Field Installed
Wire
PSC
Fan
Motor
Run
Capacitor
Fan
Relay
COM
NC
Defrost Board
Field Installed
Wire
PSC
Fan
Motor
Run
Capacitor
Fan
Relay
COM
NC
Defrost Board
1.
For non-heat pump applications
, the heat pump select jumper must be in the
Default
(
N.O.
)
position, and the HP terminals must be left unconnected.
2. Set the Cutout Speed and the Hard Start Time to the appropriate positions for the type of motor you
have (see below).
Connections for Air Conditioning Only
