Whirlpool DryAire LMA1053L Specifications download pdf (Page 25)

4.0. Head Pressure Controller / Remote Condenser

The capacity of an air cooled condenser will vary with the difference between the entering air dry bulb

temperature and the condensing temperature of the refrigerant. The low ambient control will insure the

condensing temperature is sufficiently high enough for proper operation of the refrigerant expansion

valve during low ambient conditions.

4.1. Low Ambient Head Pressure Control

With outdoor temperature 32°F and below, the DryAire remote outdoor condenser will con-

tinue to operate efficiently. As an added feature on industrial and commercial models, the

DryAire system has equipped the remote outdoor condenser with an automatic head pres-

sure controller to operate at just the right pressure when low ambient temperatures exist.

This remote outdoor condenser head pressure control is provided to vary the air flow through

the condenser using a fan cycling method during low ambient conditions.

This low ambient control is factory installed and pre-set. In most cases, field adjustment

should not be required.

Settings: “On” @ 150 psi / “Off” @ 100 psi

5.0. System Air Flow

Proper unit air flow is critical to the overall performance of dehumidification systems. Be sure to

check the static pressure requirements and design limitations of both pieces of equipment for

proper installation and operation.

All DryAire Series dehumidifiers are shipped from the factory with the external static pressure adjust-

ed at a range of 0.10" to 1.0" w/c. A different motor pulley, flywheel or motor of another horsepower

rating may be required to achieve 1.0" ESP or desired external static pressure.

5.1. Excessive Air Flow Problems.

1. High amp draw on blower motor.

2. Decrease in moisture removal capacity.

3. Excessive unit noise.

4. Water Carry-over from evaporator coil.

DryAire Systems 24

OUTDOOR REMOTE CONDENSER

LOW AMBIENT CONTROLLER

Differential Screw

Differential Pointer

Bellows

Range Screw

Manual Reset Button

Not Available On All Models

Cover Screw

IMPORTANT: DO NOT FIELD ADJUST LOW

AMBIENT CONTROLLER.

CONTACT FACTORY

FACTORY SET: “ON” @ 150 PSI

“OFF” @ 100 PSI

DIFFERENTIAL 50 PSI

1 2 ... 20 21 22 23 24 25 26 27 28 29 30 ... 40 41

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Whirlpool DryAire LMA1053L Specifications Page 25

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