Corrosion proof basepan
The 50ZH features a tough, high-
tech, single-piece, composite material
basepan with an integrated drain
pan. The composite material elimi-
nates the potential problem of rust
and premature replacement which are
common with standard metal pans.
Each 50ZH basepan is sloped to
eliminate standing water. This feature
minimizes the amount of standing
water inside the unit, which limits
algae growth.
Durable steel cabinet
The watertight construction and
corrosion-resistant finish of the 50ZH
will keep it looking like new for
years. Carrier’s paint treatment pro-
cess ensures quality protection against
the elements. A compact, low-profile
design utilizes a louvered coil
enclosure for maximum protection
against hail damage and vandalism.
Scroll compressors
Each 50ZH comes standard with
a high reliability design scroll
compressor. Each scroll compressor is
hermetically sealed against contami-
nation to help promote longer life and
dependable operation. All scroll
compressors have internal high-
pressure and overcurrent protection.
Coil efficiency
Indoor and outdoor coils are com-
puter designed for optimum heat
transfer and cooling efficiency.
Chronotemp™ defrost system
The system provides time/
temperature-based defrost cycles to
maintain unit efficiency. This highly
reliable system checks for coil icing
conditions at preset intervals and ini-
tiates a defrost cycle only if it is re-
quired. The defrost cycle ends as soon
as defrosting is accomplished. Each
defrost board is also equipped with
5-minute compressor time guard
protection.
Accessory electric heaters
A variety of accessory electric supple-
mentary heaters are available for
the 50ZH units. Each heater is a
drop-in style cartridge type with single-
point electrical connections for both
the heater and the unit.
Starter collars
Starter collars are provided with each
unit to provide easy connection to
the structure ductwork.
Dependable components
Direct-drive multispeed, PSC (perma-
nent split capacitor) blower motor is
standard on all models.
Direct-drive, PSC outdoor-fan mo-
tors are designed to help reduce
energy consumption and provide for
cooling operation down to 40 F.
Refrigerant system is designed to
provide dependability. Liquid refriger-
ant strainers are used to promote
clean, unrestricted operation. Each
unit leaves the factory with a full refrig-
erant charge and is fully run tested.
Refrigerant service connections make
checking operating pressures easier.
Model number nomenclature
Table of contents
Page
Features/Benefits ...............................1,2
Model Number Nomenclature .....................2
ARI Capacities ..................................3
Physical Data ...................................3
Accessories .....................................4
Base Unit Dimensions ...........................5-7
Selection Procedure ..............................8
Performance Data ..............................9-16
Electrical Data .................................17
Typical Wiring Schematic ......................18,19
Controls ......................................19
Typical Piping and Wiring .......................20
Guide Specifications ...........................21,22
2
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