ICM Controls ICM325A Low Ambient Head Pressure Control

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ICM Controls ICM325A Low Ambient Head Pressure Control

Air conditioning and refrigeration systems are commonly necessary to operate during cold temperatures. Server rooms, grocery stores and event spaces to name a few. When exposed to low ambient conditions, ACs and Heat Pumps condensing head pressure drops. If the head pressure gets too low, the system will not have enough pressure to operate properly and serious damage can occur including:

Evaporator freeze-ups
Hydraulic lock-ups
Liquid slugging
Compressor burnout
Fan cycling
and more

The solution is to install an ICM Head Pressure Control.

The ICM325A low ambient head pressure control ensures the condenser fan runs at an optimal speed for maximum efficiency. If the system pressure gets too low or the condenser temperature gets too cold, the ICM325A lowers the fan speed accordingly. Other head pressure controls on the market just turn the fan off completely. This method results in inconsistent head pressure, inconsistent cooling, rattling pipes & ducts, system leaks, and ultimately a shortened life span of the condenser fan motor and compressor.

SPECIFICATIONS

Operates as temperature or pressure sensitive motor fan speed control
Helps prevent evaporator freeze-ups, low pressure cut-outs and liquid-slugged compressors in low ambient conditions
Integral heat pump bypass circuitry allows electronic bypass of speed control
Eliminates overshoots common to on/off and pressure switch controls
Near field communication (phone tap) using the ICM OMNI App
Features: hard start, low temperature bypass, isolated 24 VAC supply
Controls up to 3 refrigeration circuits
RoHS compliant / lead free design
Typical application: A/C and heat pumps
Universal 120-600VAC line voltage and 24-240VAC control voltage

INPUT

Line input: 120-600 VAC
Control: 24-240 VAC (Jumper enabled)
50/60 Hz 1.8 VA max.

OUTPUT (Motor 2)

Maximum: 10 amps
Minimum: 100 mA

Operating temperature

-40°F to +176°F (-40°C to +75°C)

Temperature sensors

10K ohms at 77°F (25°C)

Heat pump reversing valve input

24-240 VAC (Heat active default / jumper enabled cool active option)

Cross Reference

ACT:	CES0110063-00, CES0110063-01, CES0110063-02, CES0110063-02A, CES0130024-01, 150-83-6A
HOFFMAN:	800, 800A, 800AA, 814-50, 816-10
RANCO:	E31Series
JOHNSON CONTROLS:	P66AAB/P66AAD
ICM Controls:	All Single Phase Head Pressure Control Models; ICM325H, ICM325HNV, ICM326HN, ICM327HN, ICM333. Including all single phase legacy LAQS Series Head Pressure Controls.