2
50ZH
the amount of standing water inside the
unit, which limits mold and mildew
growth.
DURABLE STEEL CABINET —
The
watertight construction and corrosion-
resistant finish of the 50ZH unit will
keep it looking like new for years. A
specialized paint treatment process
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 unit comes standard with a high
reliability design scroll compressor.
Each scroll compressor is hermetically
sealed against contamination 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 computer 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
initiates a defrost cycle only if it is
required. The defrost cycle ends as soon
as defrosting is accomplished. Each
defrost board is also equipped with 5-
minute compressor time delay
protection.
ACCESSORY ELECTRIC
HEATERS —
A variety of accessory
electric supplementary 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
(permanent split capacitor) blower motor
is standard on all models.
Direct-drive, PSC outdoor-fan motors are
designed to help reduce energy
consumption and provide for cooling
operation down to 40° F.
Refrigerant system is designed to
provide dependability. Liquid refrigerant
strainers are used to promote clean,
unrestricted operation. Each unit leaves
the factory with a full refrigerant charge
and is fully run tested. Refrigerant
service connections make checking
operating pressure easier.
Table of contents
Page
Features/Benefits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1, 2
Model Number Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
ARI Capacities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4,5
Base Unit Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-16
Electrical Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Typical Wiring Schematics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18-20
Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Typical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Application Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Guide Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22,23
MODEL NUMBER NOMENCLATURE
50ZH 030 5
Model No.
50ZH — Single Packaged
--------- -Heat Pump Unit
Nominal Cooling Capacity
030
– 2-1/2 Tons
036
– 3 Tons
042
– 3-1/2 Tons
048
– 4 Tons
060
– 5 Tons
Electrical Supply
5 — 208/230-3-60
6 — 460-3-60
01AD
Packaging
Series
Options
- -
– Wire Grille
AD
– Louvered Grille
BT
– Wire Grille and vinyl-coated
outdoor coil fin
XT
– Louvered Grille and vinyl-coated
outdoor coil fin
CC
– Wire Grille, AL indoor and CU/CU
outdoor coil
CU
– Wire Grille, CU/CU indoor and
outdoor coils
AC
– Louvered Grille, AL indoor and
CU/CU outdoor coil
AU
– Louvered Grille, CU/CU indoor and
outdoor coils
TP
– Tin-Plated Indoor Coil Hairpins
(Refer to current Price Page for
additional combination of options)
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