Brochure

ICM325HN, 326HN, 327HN
H
EAD PRESSURE CONTROLS
with Optional Heat Pump Bypass
LIS118-2
All features and specifications subject to change without notice.
Helps prevent evaporator freeze-ups, liquid-slugged compressors, low pressure
cutouts and overshoots seen with on/off & pressure switch controls.
Mode of Operation
ICM Head Pressure Controls operate as temperature-sensitive
motor fan speed controls. Head pressure is regulated during
low ambient conditions by varying the amount of airflow through
the condenser. This helps ensure sufficient pressure across
the expansion valve, preventing costly downtime and/or loss of
valuable perishable goods.
Features
• IntegralHeatPumpBypassCircuitry
– Allows you to electronically bypass the speed control
during heat pump operation
• Solidstate10amploadcarryingcapability
• Singleunitcontrolsupto3refrigerantcircuits
• MultipleVoltageRanges
– (See specifications for details)
• HardStart
– Adjustable from .1-5 seconds; provides full torque to
the motor during startup to help ensure proper fan
rotation and lubrication of bearings
• LowSpeedCutoff
– Field-adjustable; user may set the minimum RPM level
at which the condenser fan should operate
• HighTemperatureBypass
– Applies full voltage to the condenser fan under normal
conditions
• IntegralTransformer*(ICM326HN/327HN models)
– Simplifies installation, reduces cost; direct setup from
the line voltage
• RoHsCompliant/LeadFreeDesign
– For global use
Specifications
Input/OutputVoltage
• ICM325HN: (Input: 18-30 VAC) (Input/Output: 120-480 VAC)
ICM326HN: (Input/Output: 120/208/240 VAC)
ICM327HN: (Input/Output: 480 VAC)
• Frequency: 50/60 Hz
• Power Consumption: 4VA @ 24 VAC
Output
• Type: Solid State
• Form: Triac
• Output Current: (maximum: 10 amps) (minimum: 100 mA)
• Frequency: 50/60 Hz
• Voltage Drop: 3.0 volts maximum
• Leakage Current: 5 mA maximum
Protection
• Dielectric Breakdown: 2,500 volts maximum
• Insulation Resistance: 100 M
ControlOperatingTemperature
• Operating Temperature: -40°C to +75°C (-40°F to +176°F)
• Storage Temperature: -40°C to +85°C (-40°F to +185°F)
Dimensions
• ICM325HN: 4
3
/4”L X 3
3
/16”W X 1
1
/8”H
• ICM326HN and ICM327HN: 4
3
/4”L X 3
3
/16”W X 1
3
/4”H
OrderingInformation
• Standard Model ICM325HN: 120-480 VAC
• Models with Integral Transformers:
– ICM326HN: 120/208/240 VAC
– ICM327HN: 480 VAC
Applications
• Idealfor“LowAmbient”ConditionsFoundin:
– Supermarkets, frozen food storage
– Computer rooms, cooling tower fans
– Temperature/humidity-sensitive environments
ICM325HN
TypicalApplication
Line Voltage (120/208/240/480 VAC)
Control Voltage (24 VAC)
Air Conditioning and Heat Pumps
ICM326HN
TypicalApplication
Line Voltage (120/208/240 VAC)
Air Conditioning and Refrigeration
ICM327HN
TypicalApplication
Line Voltage (480 VAC)
Air Conditioning and Refrigeration