Installation, Operation & Application Guide
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ICM325HNV
High Voltage Head Pressure Control with
Optional Heat Pump Override
Temperature sensitive control regulates head pressure
Caution!
Installation of the ICM325HNV 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.
•
Line voltage:
120-600 VAC
•
Control voltage:
18-30 VAC
•
Frequency:
50-60 Hz
•
Operating temperature:
-40ºF to +176ºF (-40°C to +75°C)
•
Sensors:
10K ohms at 77°F (25°C)
•
Heat pump override:
24 VAC N.C. or N.O.
Note:
A maximum of three sensors can be connected to the control.
•
Weight:
12 ounces (341 grams)
Note:
The
ICM325HNV
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 (4) #8 screws
– The
ICM325HNV
should be surface mounted to a clean metal or other thermally conductive surface for maximum heat dissipation
– It is recommended that the
ICM325HNV
be mounted away from the condenser exhaust air in order to maintain lower operating temperatures
Specifications
Wiring Diagrams
Connections for Heat Pump System at 480 VAC
1. Remove power from system.
2. Field install a wire from
Line 1
wire to
Line 1
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.
Line
1
480 VAC
Line
2
Motor
2
480 VAC
Field
Installed
Wire
PSC
Fan
Motor
Run
Capacitor
Fan
Relay
COM
NC
Defrost Board
Connections for ICM325HNV at 120/208/240 VAC
1. Remove power from system.
2. Field install a wire from
Line 1
wire to
Line 1
terminal.
3. Cut
Line 2
wire; affix motor side to
Motor 2
terminal
and line side to
Line 2
terminal.
4. Make 24 VAC and temperature probe connections.
5. Verify wiring is correct.
6. Power up system and check operation.
Typical
condenser fan
PSC
Fan
Motor
Run
Capacitor
120/208/240
VAC
PSC
Fan
Motor
Run
Capacitor
Field
Installed
Wire
Line
1
120/240
VAC
Line
2
Motor
2
120/208/240
VAC
Field
Installed
Wire
PSC
Fan
Motor
Run
Capacitor
Fan
Relay
COM
NC
Defrost Board
120/208/240
VAC
Line
1
120/240
VAC
Line
2
Motor
2
Connections for Heat Pump System at 120/208/240 VAC
1. Remove power from system.
2. Field install a wire from
Line 1
wire to
Line 1
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 Air Conditioning Only
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 other side).
Temperature Probe
24 VAC
Additional
Probes
Probe S1
HP
Heat Pump
Select Jump-
er Default
Position
Connecting the Probe
Example
1. Install the temperature probe several bends into the condenser. It can be
attached to the U-bend or placed between the fins in the upper 1/3 of the
condenser (see other side for more information).
Note:
The response of the system can be fine tuned by repositioning the
probe. Place the probe on the condenser where it is 100°F when
pressures are correct for best response.
2. Connect the two wires from the sensor to the terminal block where it is marked
PROBE S1
. If
additional probes are necessary for multiple refrigerant circuits, they may be attached to terminals
marked
PROBE S2
and
PROBE S3
.
Note:
The control will respond to the probe that senses the highest temperature.
Connections for ICM325HNV at 480 VAC
1. Remove power from system.
2. Field install a wire from
Line 1
wire to
Line 1
terminal.
3. Cut
Line 2
wire; affix motor side to
Motor 2
terminal
and line side to
Line 2
terminal.
4. Make 24 VAC and temperature probe connections.
5. Verify wiring is correct.
6. Power up system and check operation.
Line
1
480 VAC
Line
2
Motor
2
480 VAC
Field
Installed
Wire
PSC
Fan
Motor
Run
Capacitor
Typical
condenser fan
PSC
Fan
Motor
Run
Capacitor
