McQuay ICM450 Installation Manual
ICM 450
Programmable Three Phase Voltage
Monitor with 25-Fault Memory
Protects motors from premature failure
and burnouts
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
Specication
Input
• Line Voltage: Universal, 190-630 VAC
• Frequency: 50-60 Hz
• Load Side Monitoring: Optional
• Control Voltage: 18-240 VAC
• Frequency: 50-60 Hz
Output
• Type: Relay, SPDT
• Voltage Range: 240VAC @ 10A maximum
• Frequency: 50-60 Hz
Control Operating Temperature
• Operating Temperature: -40ºF to +167ºF (-40ºC to +75ºC)
• Storage Temperature: -40ºF to +185ºF (-40ºC to +80ºC)
LCD Operating Temperature
• Operating Temperature: -4ºF to +167ºF (-20ºC to +75ºC)
Mechanical
• Mounting: Surface mount using (2) #8 screws
• Terminations: Screw terminals
• Weight: 12 ounces (341 grams)
Dimensions
• 6 1/2” L, 4 1/4” W, 1 3/8” H (16.5 cm. L, 10.8 cm. W, 3.5 cm. H)
Parameters
Phase Unbalance Protection
• Voltage Unbalance: 2-20% adjustable
Over/Under Voltage Protection
• Under Voltage: 2-25% adjustable
• Over Voltage: 2-25% adjustable
Phase Loss Protection
• Phase Loss Condition: Equals 25% of nominal for any given phase; system
will shut down and a fault will be recorded should this occur
Delay on Break Timer
• Control Voltage: 18-240 VAC
• Time Delay: 0 to 10 minutes adjustable
Fault Interrogation Delay
• Time Delay: 0 to 15 seconds adjustable
• Provides a delay between fault detection and system shutdown - helps to
eliminate nuisance trips or unnecessary shutdowns
Caution
Installation of the ICM450 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.
Installation
1. Using (2) #8 screws, mount the ICM450 in a cool, dry, easily accessible
location in the control panel.
2. Connect voltage as shown in Figure 1 (below). Leave existing line and load
side connections intact on the contactor.
3. Load side monitoring is optional (unit may be used to monitor line side
only). Wire the contactor and optional control voltage monitoring as in
Figures 2 and 3 (below).
Note: Load/line wire must be rated for 3-phase voltage rating, 20ga
4. Upon application of power, the ICM450 will be on line and will begin to
monitor the system.
“back” side of contactor
minimum.
Figure 1
Incoming 3-phase
voltage from load or
(optional)
LOAD
3
LOAD
2
LOAD
1
LINE
3
LINE
2
LINE
1
Incoming 3-phase voltage from
line or “front” side of contactor
The incoming 3-phase voltage is
used to power up the ICM450 as
well (190-600)
• Terminals 1 and 3 are the control signal input terminals
• “Control Mode” is turned ON or OFF in setup
• With “Control Mode” set to “ON,” there must be a
voltage present on terminals 1 and 3 for the relay
output terminals 4 and 6 to close; this voltage can be
supplied from a thermostat, pressure switch, etc.
• When the voltage on these terminals is re-applied,
the unit will not re-energize until the delay on break
(0-10 minutes) time has elapsed
• Use of terminals 1 and 3 is optional; they will be
ignored if the “Control Mode” is set to “OFF”
Figure 3
• Terminals 4 and 6 are “dry,” normally open
6 5 4
13
Contactor Coil
Contactor Voltage (18-240 VAC)
contacts
• Terminals 4 and 6 are closed when power is
within specifications
• Terminals 4 and 6 open when there is a fault
condition or loss of control signal
Figure 2
6 5 4
* Switch can be
a thermostat,
pressure
switch, etc.
Control Voltage
(18-240 VAC)
13
Short pins
when using
24 VAC
control
voltage
1
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