Westinghouse 20-SEER iQ Drive Technical Manual

•

:  Inverter  driven  Samsung  rotary  compressor

provides five capacities in modulating operation from a two

stage thermostat.

•

  Interface Control Board: Two digit LED provides system

operation, status and diagnostic troubleshooting information.

-  System Control: Utilizes a NORDYNE patented capacity

control algorithm to select the optimum system capacity

level.

-  System Protection: Internal controls monitor system

operation to protect the inverter drive and compressor.

-   Cooling operating temperature range: 50 °F to 125 °F.
-  Five Minute Restart Time Delay: When the unit shuts

down, a delay keeps the unit from restarting, eliminating

the highest cause for compressor failure.

•  Compressor and Component Access: Designed to make

servicing easier for the contractor, hinge access panels are

provided to all controls and the compressor.

•  High Efficiency with the low Sound Levels: 20 SEER with

sound ratings of 59-73 depending upon operating conditions.

•  Compressor Sound Blanket: Engineered to significantly

reduce unwanted compressor noise.

Blade: A heavy duty brushless DC motor for long lasting

reliability and engineered to provide quiet operation. Requires

no maintenance and is completely protected from rain and

snow.

•  Service Port: This port allows the contractor to read the

suction pressure in all modes of operation without removing

any panels, saving time and increasing serviceability.

•  High Pressure Switch: Protects against abnormally high

system  pressures.  Auto-reset  feature  prevents  nuisance

service visits.

•  Low  Pressure  Switch:  Protects  against  loss  of  system

refrigerant charge.

•  Liquid Line Filter Drier: Included with unit, field installed.
•  Micro-Channel Coils: All-Aluminum coils are designed to

optimize heat transfer, and increase durability and reliability.

•  Louvered Condenser Guard: Durable metal guard protects

the coil from yard hazards and extreme weather.

•  Composite  Base  Pan:  Absorbs  sound  and  is  corrosion

resistant. Composite pan is also stronger and lighter than

steel.

•  Corrosion Resistance: Designed using galvanized steel

with a polyester urethane coat finish. The 950 hour salt spray

finish resists corrosion 50% better than comparable units.

•  One Piece Top/Orifice: Designed for maximum airflow and

quiet operation.

•  Removable Top Grille Assembly: Allows ease of service

from the top without disconnecting fan motor leads.

The iQ Drive

®

air conditioner system features modulating

compressor  technology  and  variable  speed  indoor  and
outdoor fan motors. This system is controlled from a two
stage cooling and heating thermostat. The system has the
capability of adding up to 18% of additional cooling above
the rated capacity. The air handler has de-humidification
capabilities from the thermostat or duct mounted humidistat.