Carrier 50ZH Series Operation manual

50ZH
3-PHASE SINGLE-PACKAGED HEAT PUMPS
2-1/2 to 5 Tons
Product Data
Single-Packaged Heat Pump Units with:
• easy installation design
• corrosion-proof unit base
• redesigned aerodynamic fan blade for
reduced sound
• sloped drain for improved indoor air
quality
• scroll compressors
• through-the-top service access
• louvered panel coil protection
Features/Benefits
Compact, horizontal supply and return
unit, combining easy installation and
maintenance with efficient performance.
EASY TO INSTALL — The 50ZH
units are lightweight, compact single-
package units that are easy to handle.
Every 50ZH unit has an identical 32 by
51-in. footprint to make jobsite planning
simple. The precise design uses less
sheet metal and makes the 50ZH units
lighter than other units. The unit can be
easily positioned on the jobsite with the
hand-holds built into the unit basepan.
Drop-in cartridge style heaters are
utilized to minimize installation time.
REDESIGNED AERODYNAMIC
FAN BLADE DESIGN reduces overall
sound by up to 3dB; now as low as 76dB.
TOP COVER SERVICE ACCESS —
The 50ZH units are designed to be
serviced from the top. The split-top
design allows easy access for installation
and maintenance procedures on the unit.
Routine maintenance tasks such as coil
cleaning are sped up with through-the-
top access. Multiple side panels do not
need to be removed as with other units.
CORROSION PROOF UNIT
BASE— The 50ZH unit features a
tough, high-tech, single-piece,
composite material unit base with an
integrated drain. The composite material
eliminates the potential problem of rust
and premature replacement which are
common with standard metal pans. Each
50ZH unit base is sloped to eliminate
standing water. This feature minimizes
UNIT 50ZH

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)

3
50ZH
ARI* capacities
COOLING CAPACITIES AND EFFICIENCIES
Physical data
* Required filter sizes shown are based on the ARI (Air Conditioning & Refrigeration Institute) rated cooling air-
flow at a velocity of 300 ft/minute for throwaway type or 450 ft/minute for high-capacity type. Recommended fil-
ters are 1-in. thick.
UNIT
50ZH
(–SERIES)
NOMINAL
TONS
STANDARD
CFM
NET COOLING
CAPACITIES
AT 95°F (Btuh)†
SEER†
NET HEATING
CAPACITIES
AT 47°F (Btuh)†
HSPF†
HIGH HEAT
COP
AT 47°F
SOUND
RATINGS**
(dB)
030 2.5 1000 28,200 10.00 27,200 6.8 2.9 81
036 3.0 1200 34,200 10.00 33,800 6.8 3.0 78
042 3.5 1400 40,000 10.00 40,000 6.8 3.0 78
048 4.0 1600 44,500 10.00 45,000 6.8 3.0 80
060 5.0 2000 55,000 10.50 52,500 6.8 3.0 84
UNIT SIZE 50ZH 030 036 042 048 060
OPERATING WEIGHT (lb)
254 277 295 328 368
COMPRESSOR TYPE Scroll
REFRIGERANT R-22
CHARGE (lb) 5.6 5.9 6.6 9.1 9.7
REFRIGERANT METERING DEVICE Acutrol™ System
OUTDOOR COIL Copper Tubes, Aluminum Plate Fins
Rows—Fins/in.
Face Area (sq ft)
2—17
6.7
1—17
11.1
2—17
9.33
2—17
11.1
2—17
12.7
OUTDOOR-FAN MOTOR Propeller
Nominal Cfm
Nominal Rpm
Motor Hp (Rpm)
Diameter (in.)
2000
1100
1/4
20
2600
1100
1/4
20
2600
1100
1/4
20
2600
1100
1/4
20
3200
1100
1/2
20
EVAPORATOR COIL Copper Tubes, Aluminum Plate fins
Rows—Fins/in.
Face Area (sq ft)
3—15
3.1
3—15
4.0
3—15
4.0
4—15
4.4
4—15
4.9
EVAPORATOR-FAN MOTOR Direct Drive
Blower Motor Size (in.)
Nominal Cfm
Rpm Range
Number of Speeds
Factory Speed Setting
Motor Hp
10 x 8
1000
550-1000
3
Med
1/4
10 x 9
1200
800-1050
3
Low
1/2
10 x 9
1400
800-1050
3
Med
1/2
10 x 9
1600
1000-1100
2
Low
3/4
10 x 10
2000
950-1100
3
Low
1
CONNECTING DUCT SIZES Round Square
Supply Air (in.)
Return Air (in.)
14
14
13.9 x 13.9
13.9 x 27.8
FIELD-SUPPLIED RETURN AIR FILTER*
Throwaway (in.)
24 x 24 x 1 24 x 24 x 1 24 x 24 x 1 24 x 30 x 1 24 x 30 x 1
LEGEND
dB — Sound Levels (decibels)
HSPF — Heating Seasonal Performance Factor
SEER — Seasonal Energy Efficiency Ratio
COP — Coefficient of Performance
* Air Conditioning & Refrigeration Institute.
† Rated in accordance with U.S. Government DOE (Department of
Energy) test procedures and/or ARI Standard 210/240-89.
** Rated in accordance with ARI Standard 270-84.
3
2
5
A
2
M
A
N
U
F
A
C
T
U
R
E
R
C
E
R
T
I
F
I
E
D
T
O
A
R
I
A
S
C
O
M
P
L
Y
I
N
G
W
I
T
H
A
R
I
S
T
A
N
D
A
R
D
2
1
0
U
N
I
T
A
R
Y
A
I
R
C
O
N
D
I
T
I
O
N
I
N
G
E
Q
U
I
P
M
E
N
T
M
A
N
U
F
A
C
T
U
R
E
R
C
E
R
T
I
F
I
E
D
T
O
A
R
I
A
S
C
O
M
P
L
Y
I
N
G
W
I
T
H
A
R
I
S
T
A
N
D
A
R
D
2
7
0
S
O
U
N
D
R
A
T
I
N
G
O
F
O
U
T
D
O
O
R
U
N
I
T
A
R
Y
E
Q
U
I
P
M
E
N
T
®
TT

4
50ZH
Accessories
Accessory electric heater usage
ODS — Order Distribution System
ACCESSORY
MotorMaster II® Low Ambient Control allows unit to run at outdoor
temperatures down to 0°F.
Controls Upgrade Kit provides high and low pressure safety protection and
protects the unit from operating in unsuitable conditions.
Crankcase Heater provides anti-floodback protection for low load
applications.
Outdoor Thermostat
Corporate Thermostat
Electric Heat with Single-Point Kit (5.0 to 20.0 kW)
ODS CATALOG
ORDERING NO.
NOMINAL
CAPACITY
USED WITH SIZES
030 036 042 048 060
ELECTRIC HEATERS (240-3-60)
CPHEATER029A00
5 kW X X X X
CPHEATER030A00 10 kW X X X X
CPHEATER032A00 15 kW X X X X
CPHEATER041A00 20 kW X X X
ELECTRIC HEATERS (480-3-60)
CPHEATER034A00
5 kW X X X X
CPHEATER035A00 10 kW X X X X
CPHEATER036A00 15 kW X X X X
CPHEATER037A00 20 kW X X X
Corporate Thermostat provides heating and cooling unit control. The
thermostat provides system and fan switching.
Electric Heaters provide heat in the unit when required. Each package has a
heater module that slides into keyed mounting slots in the fan inlet. Heater
sizes range from 5.0 to 20.0 kW. The electric heater design allows the use of
a single-point power supply for the entire unit, resulting in lower installed
costs.
Outdoor Thermostat brings second stage of 2-stage electric heater on line
when the outdoor-air temperature falls below the set point.

5
50ZH
Accessories (cont)
MULTIPLICATION FACTORS
ODS — Order Distribution System
HEATER kW
RATING
VOLTAGE
DISTRIBUTION
V/3/60
MULTIPLICATION
FACTOR
240
200
208
230
240
0.69
0.75
0.92
1.00
480
440
460
480
0.84
0.92
1.00
Example: 15.0 kW (at 240 v) heater on 208 v
= 15.0 (.75 mult factor)
= 11.25 capacity at 208 v
50ZH Balance Point Worksheet
Balance Point Worksheet
0
10000
20000
30000
40000
50000
60000
70000
80000
-10 0 1020 304050 60
Outdoor Air Temp (Deg F)
030
036
042
048
060
Building Heat Loss, BTUH
Unit Integrated Heating Capacity (BTUH)

6
50ZH
Base unit dimensions—50ZH030
UNIT ELECTRICAL
CHARACTERISTICS
UNIT WEIGHT CENTER OF GRAVITY mm (in.) UNIT HEIGHT
(IN.)
Lb Kg X Y Z
50ZH030
208/230-3-60 254 116 356 (14.0) 483 (19.0) 305 (12.0) 22.1
REQUIRED CLEARANCE FOR OPERATION AND SERVICING
INCHES [mm]
CONDENSER. COIL ACCESS SIDE..............................................30.00 [762.0]
POWER ENTRY SIDE....................................................................30.00 [762.0]
(EXCEPT FOR NEC REQUIREMENTS)
UNIT TOP .......................................................................................48.00 [1219.2]
SIDE OPPOSITE DUCTS ..............................................................30.00 [762.0]
LEGEND
NEC – National Electrical Code
NOTES:
1. Clearances must be maintained to prevent recirculation of air from outdoor-
fan discharge, with the exception of the condenser coil (36.00 in [914.0 mm]. A
removable fence or barricade requires no clearance.
2. Dimensions are in inches. Dimensions in [ ] are in millimeters.
REQUIRED CLEARANCE TO COMBUSTIBLE MATL.
INCHES [mm]
TOP OF UNIT.........................................................................................0
DUCT SIDE OF UNIT.............................................................................0
SIDE OPPOSITE DUCTS ......................................................................0
BOTTOM OF UNIT .................................................................................0
NEC. REQUIRED CLEARANCES.
INCHES [mm]
BETWEEN UNITS, POWER ENTRY SIDE ....................................42.00 [1066.8]
UNIT AND UNGROUNDED SURFACES, POWER ENTRY SIDE .36.00 [914.0]
UNIT AND BLOCK OR CONCRETE WALLS AND OTHER
GROUNDED SURFACES, POWER ENTRY SIDE.........................42.00 [1066.8]

7
50ZH
Base unit dimensions—50ZH036-048
REQUIRED CLEARANCE FOR OPERATION AND SERVICING
INCHES [mm]
CONDENSER. COIL ACCESS SIDE.............................................. 30.00 [762.0]
POWER ENTRY SIDE....................................................................30.00 [762.0]
(EXCEPT FOR NEC REQUIREMENTS)
UNIT TOP .......................................................................................48.00 [1219.2]
SIDE OPPOSITE DUCTS ..............................................................30.00 [762.0]
LEGEND
NEC – National Electrical Code
NOTES:
1. Clearances must be maintained to prevent recirculation of air from outdoor-
fan discharge, with the exception of the condenser coil (36.00 in [914.0 mm]. A
removable fence or barricade requires no clearance.
2. Dimensions are in inches. Dimensions in [ ] are in millimeters.
REQUIRED CLEARANCE TO COMBUSTIBLE MATL.
INCHES [mm]
TOP OF UNIT.........................................................................................0
DUCT SIDE OF UNIT.............................................................................0
SIDE OPPOSITE DUCTS ......................................................................0
BOTTOM OF UNIT.................................................................................0
NEC. REQUIRED CLEARANCES.
INCHES [mm]
BETWEEN UNITS, POWER ENTRY SIDE ....................................42.00 [1066.8]
UNIT AND UNGROUNDED SURFACES, POWER ENTRY SIDE .36.00 [914.0]
UNIT AND BLOCK OR CONCRETE WALLS AND OTHER
GROUNDED SURFACES, POWER ENTRY SIDE.........................42.00 [1066.8]
UNIT ELECTRICAL
CHARACTERISTICS
UNIT WEIGHT CENTER OF GRAVITY mm (in.) UNIT HEIGHT
(IN.)
Lb Kg X Y Z
50ZH036
208/230-3-60, 460-3-60 277 126 356 (14.0) 483 (19.0) 381 (15.0) 30.1
50ZH042 208/230-3-60, 460-3-60 277 126 356 (14.0) 483 (19.0) 381 (15.0) 30.1
50ZH048 208/230-3-60, 460-3-60 277 126 356 (14.0) 483 (19.0) 381 (15.0) 30.1

8
50ZH
Base unit dimensions—50ZH060
REQUIRED CLEARANCE FOR OPERATION AND SERVICING
INCHES [mm]
CONDENSER. COIL ACCESS SIDE..............................................30.00 [762.0]
POWER ENTRY SIDE....................................................................30.00 [762.0]
(EXCEPT FOR NEC REQUIREMENTS)
UNIT TOP .......................................................................................48.00 [1219.2]
SIDE OPPOSITE DUCTS ..............................................................30.00 [762.0]
LEGEND
NEC – National Electrical Code
NOTES:
1. Clearances must be maintained to prevent recirculation of air from outdoor-
fan discharge, with the exception of the condenser coil (36.00 in [914.0 mm]. A
removable fence or barricade requires no clearance.
2. Dimensions are in inches. Dimensions in [ ] are in millimeters.
REQUIRED CLEARANCE TO COMBUSTIBLE MATL.
INCHES [mm]
TOP OF UNIT.........................................................................................0
DUCT SIDE OF UNIT.............................................................................0
SIDE OPPOSITE DUCTS ......................................................................0
BOTTOM OF UNIT .................................................................................0
NEC. REQUIRED CLEARANCES.
INCHES [mm]
BETWEEN UNITS, POWER ENTRY SIDE ....................................42.00 [1066.8]
UNIT AND UNGROUNDED SURFACES, POWER ENTRY SIDE .36.00 [914.0]
UNIT AND BLOCK OR CONCRETE WALLS AND OTHER
GROUNDED SURFACES, POWER ENTRY SIDE.........................42.00 [1066.8]
UNIT
ELECTRICAL
CHARACTERISTICS
V-Ph-Hz
UNIT WEIGHT CENTER OF GRAVITY mm (in.) UNIT HEIGHT
(IN.)
Lb Kg X Y Z
50ZH060
208/230-3-60, 460-3-60 368 167 356 (14.00) 508 (20.00) 406 (16.00) 35.8

9
50ZH
Selection Procedure
I DETERMINE COOLING AND HEATING
REQUIREMENTS AT DESIGN CONDITIONS:
Given:
Required Cooling Capacity (TC) . . . . . . . . . . 28,000 Btuh
Sensible Heat Capacity (SHC) . . . . . . . . . . . . 20,500 Btuh
Required Heating Capacity. . . . . . . . . . . . . . . 28,550 Btuh
Outdoor Entering-Air Temperature . . . . . . . . . . . . . . 95° F
Outdoor-Air Winter Design Temperature . . . . . . . . 20° F
Indoor-Air Winter Design Temperature. . . . . . . . . . . 70° F
Indoor Entering-Air Temperature. . . . . . . . . . . . 80° F edb,
67° F ewb
Indoor-Air Quantity . . . . . . . . . . . . . . . . . . . . . . .1125 cfm
External Static Pressure . . . . . . . . . . . . . . . . . . 0.20 in. wg
Electrical Characteristics (V-Ph-Hz) . . . . . . 208/230-3-60
edb — entering dry bulb
ewb — entering wet bulb
II SELECT UNIT BASED ON REQUIRED COOLING
CAPACITY.
Enter Cooling Capacities table at condenser entering
temperature of 95° F, indoor air entering at 1125 cfm and
67° F ewb (entering wet bulb). The 50ZH030 unit will
provide a total cooling capacity of 28,800 Btuh and a
sensible heat capacity of 21,700 Btuh.
For indoor-air temperature other than 80° F edb (entering
dry bulb), calcualte sensible heat capacity correction, as
required, using the formula found in Note 3 following the
cooling capacities tables.
NOTE: Unit ratings are net capacities.
III SELECT ELECTRIC HEAT.
Enter the 50ZH030 Heating Capacities table at 1125 cfm.
At 70° F return indoor air and 20° F air entering outdoor
coil, the inegrated heating capacity is 15,500 Btuh. (Select
integrated heating capacity value since deductions for
outdoor-coil frost and defrosting have already been made.
No correction is required.)
The required heating capacity is 28,550 Btuh. Therefore,
13,050 Btuh (28,550 – 15,500) additional electric heat is
required.
Determine additional electric heat capacity in kW.
13,050 Btuh
3414 Btuh/kW
Enter the Accessory Electric Heater Usage table on page 4
for 208/240 v. three-phase, 50ZH030 unit. The 5-kW heater
at 240 v most closely satisfies the heating required. To
calculate kW at 230 v, multiply the heater kW by
multiplication factor 0.92 found in the Multiplication
Factors table on page 5.
5 kW x 0.92 = 4.6 kW
4.6 x 3414 = 15,704 Btuh
To calculate kW at 208 v, see Multiplication Factors table
on page 5.
Total unit heating capacity is 31,204 Btuh (15,500 +
15,704).
IV DETERMINE FAN SPEED AND POWER
REQUIREMENTS AT DESIGN CONDITIONS.
Before entering the air delivery tables, calculate the total
static pressure required. From the given, the Accessory
Electric Heat Pressure Drop table, Wet Coil Pressure Drop
table, and the Filter Pressure Drop table, find:
External static pressure 0.20 in. wg
Filter 0.09 in. wg
Electric heat 0.11 in. wg
Wet coil 0.07 in. wg
Total static pressure 0.47 in. wg
Enter the table for Dry Coil Air Delivery — Horizontal
Discharge at 1125 cfm and 230-v high speed. By
interpolation, the standard motor will deliver 0.48 in. wg
static pressure. This will adequately handle job
requirements.
= 3.8 kW of heat required

10
50ZH
Performance data
COOLING CAPACITY
See page 15 for cooling notes.
HEATING CAPACITY
50ZH030 (2-1/2 TONS)
Temp (F)
Air Ent
Outdoor
coil (edb)
Indoor Entering Air—CFM/BF
875/0.10 1000/0.11 1125/0.12
Indoor Entering Air — Ewb (F)
72 67 63* 62 72 67 63* 62 72 67 63* 62
85
TC
31.6 29.2 27.1 26.4 32.2 29.6 27.5 26.9 31.9 29.9 27.8 27.2
SHC 15.0 19.8 19.5 23.9 15.7 20.9 20.7 25.4 15.9 22.0 21.7 26.6
kW 2.80 2.76 2.73 2.71 2.87 2.82 2.79 2.77 2.90 2.88 2.84 2.83
95
TC
30.9 28.1 26.0 25.3 31.2 28.2 26.4 25.7 31.4 28.8 26.7 26.1
SHC 15.0 19.4 19.1 23.4 15.6 20.6 20.3 24.9 16.1 21.7 21.3 26.0
kW 3.05 3.00 2.96 2.94 3.11 3.05 3.02 3.00 3.16 3.11 3.07 3.06
105 TC
29.7 26.9 24.8 24.1 30.0 27.2 25.1 24.5 30.1 27.5 25.4 25.1
SHC 14.6 19.0 18.6 22.8 15.2 20.2 19.8 24.2 15.7 21.4 20.9 25.1
kW 3.31 3.26 3.21 3.19 3.37 3.32 3.27 3.26 3.41 3.37 3.34 3.33
115 TC
28.4 25.5 23.5 22.9 28.7 25.8 23.8 23.4 28.8 26.1 24.0 24.0
SHC 14.2 18.6 18.1 22.2 14.9 19.8 19.2 23.4 15.4 20.9 20.3 24.0
kW 3.58 3.53 3.46 3.44 3.64 3.60 3.53 3.51 3.69 3.65 3.59 3.59
50ZH030
Temp (F)
Air Ent
Indoor
Coil
Indoor
Air CFM
(Std)
Air Temperature Entering Outdoor Coil (F db at 70% rh)
-100 1017203040475060
60
875 Cap.
9.13 8.40 11.5 10.6 14.1 13.0 16.1 14.7 17.0 15.4 20.4 17.8 24.2 24.2 27.5 27.5 28.6 28.6 33.9 33.9
kW
2.12 2.18 2.25 2.29 2.31 2.40 2.49 2.58 2.61 2.77
1000 Cap.
9.30 8.56 11.7 10.8 14.3 13.1 16.3 14.8 17.2 15.6 20.6 18.0 24.4 24.4 27.8 27.8 28.9 28.9 34.3 34.3
kW
2.15 2.20 2.26 2.30 2.32 2.39 2.48 2.56 2.59 2.73
1125 Cap.
9.46 8.70 11.9 10.9 14.5 13.3 16.4 15.0 17.4 15.8 20.8 18.2 24.6 24.6 28.0 28.0 29.2 29.2 34.6 34.6
kW 2.19 2.23 2.28 2.32 2.33 2.40 2.48 2.56 2.58 2.71
70
875 Cap. 8.62 7.93 11.1 10.2 13.8 12.7 15.8 14.4 16.7 15.1 20.0 17.5 23.7 23.7 26.9 26.9 28.0 28.0 33.1 33.1
kW 2.26 2.33 2.41 2.47 2.49 2.58 2.68 2.78 2.81 2.97
1000 Cap. 8.81 8.11 11.3 10.4 14.0 12.9 16.0 14.6 16.9 15.3 20.2 17.7 23.9 23.9 27.2 27.2 28.3 28.3 33.6 33.6
kW 2.29 2.35 2.42 2.47 2.49 2.57 2.66 2.75 2.78 2.92
1125 Cap. 8.97 8.25 11.5 10.5 14.2 13.0 16.2 14.7 17.1 15.5 20.4 17.9 24.2 24.2 27.5 27.5 28.6 28.6 33.9 33.9
kW 2.32 2.38 2.44 2.48 2.50 2.57 2.66 2.74 2.77 2.90
80
875 Cap. 7.99 7.35 10.6 9.71 13.3 12.2 15.5 14.1 16.4 14.9 19.6 17.2 23.2 23.2 26.3 26.3 27.4 27.4 32.4 32.4
kW 2.39 2.49 2.58 2.64 2.67 2.78 2.89 2.99 3.03 3.20
1000 Cap. 8.18 7.53 10.7 9.89 13.6 12.4 15.7 14.3 16.6 15.0 19.8 17.4 23.5 23.5 26.6 26.6 27.7 27.7 32.8 32.8
kW 2.42 2.51 2.59 2.65 2.67 2.77 2.87 2.96 2.99 3.14
1125 Cap. 8.36 7.69 10.9 10.1 13.8 12.6 15.9 14.5 16.8 15.2 20.0 17.6 23.7 23.7 26.9 26.9 28.0 28.0 33.2 33.2
kW 2.45 2.53 2.61 2.66 2.68 2.77 2.86 2.94 2.97 3.11
LEGEND
Cap. — Heating Capacity (1000 Btuh) (Includes Indoor-Fan Motor Heat)
db — Dry Bulb
kW — Total Power Input (Includes Compressor Motor Power Input
Outdoor-Fan Motor Input, and Indoor-Fan Motor Input)
rh — Relative Humidity
NOTES:
1. indicates integrated ratings
2. Integrated capacity is maximum (instantaneous) capacity less the
effect of frost on the outdoor coil and the heat required to defrost it.

11
50ZH
Performance data (cont)
COOLING CAPACITY
See page 15 for cooling notes.
HEATING CAPACITY
50ZH036 (3 TONS)
Temp (F)
Air Ent
Outdoor
coil (edb)
Evaporator Air—CFM/BF
1050/0.09 1200/0.11 1350/0.12
Evaporator Air — Ewb (F)
72 67 63* 62 72 67 63* 62 72 67 63* 62
85
TC 39.9 35.8 33.1 32.3 40.5 36.4 33.7 32.9 40.9 36.8 34.0 33.3
SHC 19.1 24.2 23.4 29.0 19.9 25.7 24.8 30.8 20.7 27.0 26.0 32.4
kW 3.49 3.37 3.29 3.27 3.57 3.45 3.36 3.35 3.64 3.52 3.43 3.42
95
TC 28.5 34.5 31.8 31.0 39.1 34.2 32.3 31.6 39.4 35.4 32.7 32.0
SHC 18.7 23.7 22.9 28.4 19.5 25.2 24.3 30.3 20.4 26.6 25.6 31.8
kW 3.80 3.67 3.58 3.56 3.88 3.75 3.66 3.64 3.95 3.82 3.73 3.72
105 TC 36.9 33.0 30.4 29.6 37.5 33.5 30.9 30.1 37.9 33.8 31.2 30.8
SHC 18.2 23.2 22.4 27.8 19.0 24.7 23.8 29.6 19.9 26.1 25.1 30.8
kW 4.15 4.01 3.91 3.89 4.23 4.08 3.99 3.97 4.30 4.16 4.06 4.05
115 TC 35.2 31.4 28.9 28.2 35.7 31.9 29.3 28.7 36.1 32.1 29.6 29.6
SHC 17.6 22.6 21.8 27.1 18.5 24.1 23.2 28.7 19.3 25.5 24.5 29.5
kW 4.51 4.36 4.26 4.24 4.60 4.44 4.34 4.33 4.68 4.52 4.14 4.42
50ZH036
Temp (F)
Air Ent
Indoor
Coil
Indoor
Air CFM
(Std)
Air Temperature Entering Outdoor Coil (F db at 70% rh)
-100 1017203040475060
60
1050 Cap. 11.4 10.5 14.4 13.2 17.6 16.2 20.1 18.3 21.2 19.2 25.3 22.2 30.1 30.1 34.0 34.0 35.4 35.4 41.9 41.9
kW 2.48 2.56 2.65 2.71 2.74 2.85 2.98 3.09 3.12 3.31
1200 Cap. 11.6 10.7 14.6 13.4 17.9 16.4 20.3 18.5 21.4 19.4 25.6 22.4 30.4 30.4 34.3 34.3 35.8 35.8 42.2 42.2
kW 2.51 2.58 2.66 2.71 2.74 2.84 2.95 3.05 3.08 3.24
1350 Cap. 11.8 10.9 14.8 13.6 18.1 16.6 20.5 18.7 21.6 19.6 25.8 22.6 30.6 30.6 34.6 34.6 36.0 36.0 42.4 42.4
kW 2.55 2.61 2.68 2.73 2.75 2.84 2.94 3.03 3.06 3.19
70
1050 Cap. 10.8 9.96 13.9 12.8 17.3 15.8 19.8 18.1 20.9 19.0 25.0 21.9 29.7 29.7 33.5 33.5 34.9 34.9 41.2 41.2
kW 2.66 2.76 2.86 2.94 2.97 3.09 3.23 3.35 3.39 3.59
1200 Cap. 11.1 10.2 14.1 13.0 17.5 16.1 20.0 18.2 21.1 19.2 25.2 22.1 29.9 29.9 33.8 33.8 35.2 35.2 41.7 41.7
kW 2.69 2.78 2.87 2.93 2.96 3.07 3.19 3.30 3.34 3.52
1350 Cap. 11.3 10.4 14.3 13.2 17.7 16.2 20.2 18.4 21.3 19.3 25.4 22.3 30.2 30.2 34.1 34.1 35.5 35.5 42.0 42.0
kW 2.73 2.81 2.89 2.94 2.97 3.07 3.18 3.27 3.31 3.47
80
1050 Cap. 10.1 9.29 13.3 12.3 16.8 15.5 19.5 17.8 20.7 18.8 24.9 21.8 29.4 29.4 33.4 33.4 34.7 34.7 40.8 40.8
kW 2.84 2.97 3.10 3.19 3.23 3.37 3.53 3.67 3.71 3.91
1200 Cap. 10.3 9.52 13.6 12.5 17.1 15.7 19.8 18.0 21.0 19.1 25.2 22.0 29.7 29.7 33.8 33.8 35.1 35.1 41.3 41.3
kW 2.87 2.99 3.10 3.18 3.22 3.35 3.48 3.61 3.64 3.82
1350 Cap. 10.6 9.72 13.8 12.7 17.3 15.9 20.0 18.2 21.3 19.3 25.4 22.3 29.9 29.9 34.1 34.1 35.4 35.4 41.5 41.5
kW 2.91 3.02 3.12 3.19 3.22 3.34 3.46 3.57 3.61 3.75
LEGEND
Cap. — Heating Capacity (1000 Btuh) (Includes Indoor-Fan Motor Heat)
db — Dry Bulb
kW — Total Power Input (Includes Compressor Motor Power Input,
Outdoor-Fan Motor Input, and Indoor-Fan Motor Input)
rh — Relative Humidity
NOTES:
1. indicates integrated ratings.
2. Integrated capacity is maximum (instantaneous) capacity less the
effect of frost on the outdoor coil and the heat required to defrost it.

12
50ZH
Performance data (cont)
COOLING CAPACITY
See page 15 for cooling notes.
HEATING CAPACITY
50ZH042 (3-1/2 TONS)
Temp (F)
Air Ent
Outdoor
coil (edb)
Indoor Entering — CFM/BF
1225/0.11 1400/0.13 1575/0.14
Indoor Entering — Ewb (F)
72 67 63* 62 72 67 63* 62 72 67 63* 62
85
TC 45.9 41.1 38.0 37.0 46.6 41.8 38.6 37.6 47.2 42.3 39.1 38.2
SHC 22.1 28.0 27.1 33.5 23.2 29.8 28.7 35.6 24.2 31.5 30.3 37.5
kW 4.28 4.15 4.06 4.04 4.37 4.24 4.15 4.13 4.45 4.32 4.23 4.21
95
TC 43.9 39.2 36.2 35.2 44.6 40.0 36.8 35.8 45.2 40.3 37.2 36.4
SHC 21.5 27.3 26.4 32.7 22.5 29.1 28.0 34.7 23.5 30.8 29.6 36.4
kW 4.65 4.51 4.42 4.39 4.74 4.60 4.50 4.48 4.82 4.68 4.58 4.56
105 TC 41.8 37.2 34.3 33.4 42.5 37.8 34.8 34.0 42.9 38.2 35.2 34.9
SHC 20.8 26.6 25.6 31.8 21.8 28.3 27.2 33.7 22.8 30.0 28.8 34.9
kW 5.00 4.90 4.80 4.78 5.09 4.99 4.89 4.87 5.17 5.07 4.97 4.97
115 TC 39.7 35.2 32.4 31.5 40.2 35.7 32.8 32.3 40.7 36.0 33.1 33.3
SHC 20.1 25.8 24.8 30.8 21.1 27.5 26.4 32.3 22.1 29.2 27.9 33.3
kW 5.44 5.32 5.21 5.19 5.53 5.41 5.30 5.29 5.61 5.50 5.40 5.40
50ZH042
Temp (F)
Air Ent
Indoor
Coil
Indoor
Air CFM
(Std)
Air Temperature Entering Outdoor Coil (F db at 70% rh)
-100 1017203040475060
60
1225 Cap. 13.4 12.4 16.9 15.5 20.7 19.0 23.7 21.6 25.2 22.9 29.8 26.1 35.2 35.2 40.3 40.3 42.4 42.4 49.7 49.7
kW 2.87 2.98 3.09 3.17 3.22 3.35 3.51 3.66 3.73 3.97
1400 Cap. 13.4 12.3 16.8 15.4 20.9 19.2 23.9 21.8 25.3 23.0 30.2 26.5 35.6 35.6 40.8 40.8 42.7 42.7 50.4 50.4
kW 2.90 3.00 3.10 3.18 3.22 3.34 3.48 3.62 3.67 3.90
1575 Cap. 13.3 12.3 17.0 15.6 21.1 19.4 24.2 22.1 25.6 23.2 30.5 26.8 36.0 36.0 41.2 41.2 43.0 43.0 50.9 50.9
kW 2.95 3.04 3.13 3.20 3.23 3.35 3.48 3.61 3.65 3.86
70
1225 Cap. 12.5 11.5 16.1 14.8 20.0 18.3 23.1 21.1 24.6 22.4 29.2 25.6 34.5 34.6 39.5 39.5 41.6 41.6 48.7 48.7
kW 3.06 3.19 3.32 3.43 3.47 3.63 3.80 3.97 4.04 4.30
1400 Cap. 12.5 11.5 16.0 14.7 20.2 18.5 23.4 21.3 24.8 22.5 29.6 25.9 34.9 34.9 40.0 40.0 41.8 41.8 49.3 49.3
kW 3.09 3.21 3.34 3.43 3.47 3.61 3.76 3.92 3.97 4.21
1575 Cap. 12.4 11.4 16.2 14.9 20.5 18.8 23.7 21.6 25.1 22.7 29.9 26.2 35.3 35.3 40.4 40.4 42.2 42.2 49.9 49.9
kW 3.14 3.25 3.36 3.45 3.48 3.61 3.75 3.89 3.94 4.16
80
1225 Cap. 11.4 10.5 15.1 13.9 19.1 17.5 22.4 20.4 24.0 21.7 28.6 25.1 33.8 33.8 38.7 38.7 40.8 40.8 47.7 47.7
kW 3.25 3.41 3.57 3.69 3.75 3.93 4.13 3.31 4.38 4.66
1400 Cap. 11.4 10.5 15.0 13.8 19.3 17.8 22.7 20.7 24.2 21.9 29.0 25.4 34.2 34.2 39.2 39.2 41.0 41.0 48.3 48.3
kW 3.29 3.44 3.59 3.70 3.74 3.91 4.08 4.25 4.30 4.56
1575 Cap. 11.4 10.4 15.2 14.0 19.7 18.0 23.0 21.0 24.5 22.2 29.3 25.7 34.6 34.6 39.6 39.6 41.1 41.4 48.9 48.9
kW 3.33 3.47 3.61 3.71 3.75 3.90 4.06 4.21 4.26 4.50
LEGEND
Cap. — Heating Capacity (1000 Btuh) (Includes Indoor-Fan Motor Heat)
db — Dry Bulb
kW — Total Power Input (Includes Compressor Motor Power Input
Outdoor-Fan Motor Input, and Indoor-Fan Motor Input)
rh — Relative Humidity
NOTES:
1. indicates integrated ratings
2. Integrated capacity is maximum (instantaneous) capacity less the
effect of frost on the outdoor coil and the heat required to defrost it.

13
50ZH
Performance data (cont)
COOLING CAPACITY
See page 15 for cooling notes.
HEATING CAPACITY
50ZH048 (4 TONS)
Temp (F)
Air Ent
Outdoor
coil (edb)
Indoor Entering—CFM/BF
1400/0.04 1600/0.05 1800/0.06
Indoor Entering Air — Ewb (F)
72 67 63* 62 72 67 63* 62 72 67 63* 62
85
TC 46.5 44.8 43.3 42.9 46.2 44.5 43.2 42.9 45.5 43.9 43.0 42.8
SHC 23.8 32.1 31.9 40.4 23.9 32.8 32.8 41.6 23.7 33.4 34.0 42.5
kW 4.2 4.2 4.1 4.1 4.4 4.4 4.3 4.3 4.7 4.6 4.5 4.5
95
TC 46.8 44.6 43.2 42.8 46.4 44.3 43.3 43.0 45.8 43.8 43.0 42.8
SHC 24.5 32.6 33.0 41.5 24.7 33.9 34.1 42.1 24.8 34.9 34.5 42.1
kW 4.6 4.6 4.5 4.5 4.8 4.8 4.7 4.7 5.1 5.0 4.9 4.9
105 TC 46.2 43.9 42.5 42.2 45.9 43.6 42.9 42.8 45.4 43.0 42.5 42.4
SHC 24.6 33.0 33.2 41.5 25.1 34.4 33.6 41.0 25.3 35.6 35.3 42.1
kW 5.0 5.0 4.9 4.9 5.2 5.2 5.1 5.1 5.5 5.4 5.3 5.3
115 TC 45.2 42.6 41.2 40.9 44.8 42.3 41.9 41.9 44.3 41.9 41.7 41.7
SHC 24.4 33.0 40.6 40.6 24.9 34.7 39.9 40.3 25.3 35.8 40.2 40.2
kW 5.4 5.4 5.3 5.3 5.7 5.6 5.5 5.5 5.9 5.8 5.7 5.7
50ZH048
Temp (F)
Air Ent
Indoor
Coil
Indoor
Air CFM
(Std)
Air Temperature Entering Outdoor Coil (F db at 70% rh)
-100 1017203040475060
60
1400 Cap. 12.48 11.54 17.03 15.67 21.59 19.52 27.90 25.44 26.72 24.24 33.72 29.54 41.10 41.10 47.00 47.00 48.69 48.69 54.21 54.21
kW 3.01 3.11 3.22 3.29 3.35 3.56 3.81 4.00 4.00 4.09
1600 Cap. 16.54 16.30 20.32 18.70 24.10 22.12 26.74 24.38 28.49 26.84 34.30 30.05 41.61 41.61 46.91 46.91 48.39 48.39 51.91 51.91
kW 3.27 3.33 3.40 3.45 3.50 3.67 3.91 4.02 4.04 4.11
1800 Cap. 20.40 18.87 23.41 21.54 26.43 24.26 28.53 26.02 30.09 27.29 34.92 30.60 41.87 41.87 46.62 46.62 47.44 47.44 49.85 49.85
kW 3.49 3.54 3.59 3.62 3.67 3.84 4.02 4.15 4.16 4.21
70
1400 Cap. 11.27 10.43 16.06 14.78 20.85 19.14 24.20 22.07 26.21 23.77 33.59 29.43 40.95 40.95 46.91 46.91 48.85 48.85 54.94 54.94
kW 3.20 3.33 3.46 3.55 3.62 3.86 4.13 4.34 4.40 4.48
1600 Cap. 14.02 12.97 18.33 16.87 22.64 20.78 25.66 23.39 27.55 24.98 34.21 29.98 41.55 41.55 47.35 47.35 48.77 48.77 53.87 53.87
kW 3.45 3.55 3.64 3.71 3.77 3.98 4.24 4.41 4.42 4.50
1800 Cap. 17.86 16.51 21.48 19.78 25.10 23.03 27.63 25.19 29.35 26.62 34.98 30.65 42.23 42.23 47.48 47.48 48.95 48.95 52.05 52.05
kW 3.75 3.81 3.87 3.92 3.98 4.15 4.41 4.53 4.55 4.60
80
1400 Cap. 11.01 10.18 15.83 14.57 20.65 18.96 24.03 21.91 26.04 23.52 33.47 29.33 41.01 41.01 46.64 46.64 48.62 48.62 55.07 55.07
kW 3.45 3.59 3.73 3.84 3.92 4.19 4.49 4.71 4.77 4.89
1600 Cap. 13.02 12.04 17.53 16.13 22.05 20.24 25.21 22.99 27.16 24.63 34.11 29.89 41.61 41.61 47.34 47.34 49.04 49.04 54.55 54.55
kW 3.70 3.81 3.93 4.00 4.08 4.31 4.60 4.81 4.83 4.91
1800 Cap. 15.84 14.65 19.89 18.30 23.94 21.98 26.78 24.42 28.61 25.95 34.92 30.59 42.30 42.30 47.74 47.74 49.37 49.37 53.66 53.66
kW 3.99 4.07 4.16 4.22 4.29 4.50 4.78 4.95 4.97 5.02
LEGEND
C
ap. — Heating Capacity (1000 Btuh) (Includes Indoor-Fan Motor Heat)
d
b— Dry Bulb
kW — Total Power Input (Includes Compressor Motor Power Input,
Outdoor-Fan Motor Input, and Indoor-Fan Motor Input)
rh — Relative Humidity
NOTES:
1. indicates integrated ratings
2. Integrated capacity is maximum (instantaneous) capacity less the
effect of frost on the outdoor coil and the heat required to defrost it.

14
50ZH
Performance data (cont)
COOLING CAPACITY
See page 15 for cooling notes.
HEATING CAPACITY
50ZH060 (5 TONS)
Temp (F)
Air Ent
Outdoor
coil (edb)
Evaporator Air—CFM/BF
1750/0.08 2000/0.08 2250/0.09
Evaporator Air — Ewb (F)
72 67 63* 62 72 67 63* 62 72 67 63* 62
85
TC 65.7 59.9 55.5 54.4 66.4 60.8 56.5 55.7 67.3 61.7 57.4 57.4
SHC 33.7 43.4 50.8 52.5 35.2 46.5 54.4 55.7 36.8 49.4 57.3 57.4
kW 5.55 5.45 5.35 5.33 5.67 5.58 5.48 5.47 5.82 5.71 5.61 5.62
95
TC 63.1 55.0 52.8 51.8 64.1 58.1 53.7 53.5 64.7 58.8 55.3 55.0
SHC 32.9 41.9 49.6 51.1 34.5 45.4 53.1 53.4 36.3 48.3 55.2 55.0
kW 5.94 5.85 5.74 5.72 6.08 5.98 5.87 5.88 6.21 6.09 6.02 6.03
105 TC 60.2 53.6 49.9 49.3 61.0 54.9 51.2 51.1 61.7 55.7 52.7 52.6
SHC 31.9 40.8 48.3 49.3 33.6 44.3 51.1 51.1 35.3 47.2 52.7 52.6
kW 6.37 6.28 6.18 6.16 6.50 6.40 6.32 6.33 6.64 6.52 6.47 6.48
115 TC 57.3 51.2 47.1 46.7 58.0 51.8 48.7 48.7 58.6 52.6 50.1 50.2
SHC 30.9 40.1 47.0 46.7 32.7 43.1 48.7 48.7 34.3 46.1 50.1 50.1
kW 6.80 6.71 6.61 6.60 6.92 6.83 6.77 6.78 7.07 6.95 6.92 6.93
50ZH060
Temp (F)
Air Ent
Indoor
Coil
Indoor
Air CFM
(Std)
Air Temperature Entering Outdoor Coil (F db at 70% rh)
-100 1017203040475060
60
1800 Cap. 15.1 13.9 19.4 17.8 24.3 22.3 28.6 26.1 30.8 27.9 37.7 33.0 45.8 45.8 53.5 53.5 56.3 56.3 68.1 68.1
kW 3.48 3.64 3.82 3.97 4.05 4.28 4.56 4.79 4.88 5.26
2000 Cap. 15.1 13.9 19.4 17.8 24.6 22.6 28.8 26.3 30.9 28.1 38.0 33.3 46.3 46.3 53.9 53.9 56.5 56.5 68.7 68.7
kW 3.53 3.69 3.87 4.01 4.08 4.31 4.57 4.80 4.88 5.24
2250 Cap. 15.1 13.9 19.8 18.2 25.2 23.1 29.3 26.8 31.5 28.5 28.7 33.9l 47.1 47.1 54.7 54.7 57.3 57.3 69.8 69.8
kW 3.60 3.76 3.94 4.08 4.14 4.36 4.62 4.83 4.91 5.26
70
1800 Cap. 14.4 13.2 18.7 17.2 23.7 21.8 28.0 25.5 30.2 27.4 37.0 32.4 44.9 44.9 52.5 52.5 55.2 55.2 66.7 66.7
kW 3.71 3.90 4.10 4.25 4.33 4.59 4.88 5.13 5.23 5.63
2000 Cap. 14.3 13.2 18.7 17.2 24.0 22.0 28.3 25.8 30.4 27.5 37.3 32.7 45.3 45.3 52.8 52.8 55.4 55.4 67.3 67.3
kW 3.76 3.94 4.14 4.29 4.36 4.61 4.89 5.12 5.21 5.60
2250 Cap. 14.3 13.2 19.0 17.5 24.2 22.2 28.7 26.2 30.8 28.0 37.9 33.2 46.1 46.1 53.6 53.6 56.1 56.1 68.3 68.3
kW 3.83 4.01 4.19 4.34 4.42 4.66 4.92 5.15 5.23 5.60
80
1800 Cap. 13.5 12.4 17.8 16.4 22.9 21.1 27.2 24.8 29.3 26.6 36.2 31.7 43.9 43.9 51.4 51.4 54.2 54.2 65.3 65.3
kW 3.97 4.18 4.40 4.57 4.65 4.93 5.24 5.51 5.62 6.04
2000 Cap. 13.5 12.4 17.8 16.4 23.2 21.3 27.5 25.1 29.6 26.8 36.6 32.0 44.4 44.4 51.8 51.8 54.4 54.4 65.9 65.9
kW 4.02 4.22 4.43 4.60 4.67 4.94 5.24 5.49 5.59 5.99
2250 Cap. 13.5 12.4 18.1 16.7 23.6 21.7 27.9 25.5 30.0 27.2 37.1 32.5 44.9 44.9 52.4 52.4 54.9 54.9 66.7 66.7
kW 4.08 4.28 4.49 4.64 4.72 4.98 5.26 5.50 5.59 5.98
LEGEND
C
ap. — Heating Capacity (1000 Btuh) (Includes Indoor-Fan Motor Heat)
d
b— Dry Bulb
kW — Total Power Input (Includes Compressor Motor Power Input
Outdoor-Fan Motor Input, and Indoor-Fan Motor Input)
rh — Relative Humidity
NOTES:
1. indicates integrated ratings
2. Integrated capacity is maximum (instantaneous) capacity less the
effect of frost on the outdoor coil and the heat required to defrost it.

15
50ZH
WET COIL PRESSURE DROP
FILTER PRESSURE DROP (in. wg)
ACCESSORY ELECTRIC HEAT PRESSURE DROP (in. wg)
UNIT SIZE
50ZH
AIRFLOW
(cfm)
PRESSURE DROP
(in. wg)
030
900 0.06
1000 0.06
1200 0.08
036
1000 0.04
1200 0.05
1400 0.07
1600 0.08
042
1000 0.04
1200 0.06
1400 0.08
1600 0.09
048
1400 0.07
1600 0.08
1800 0.09
060
1700 0.07
1800 0.08
2100 0.09
2300 0.10
UNIT
SIZE
50ZH
FILTER
SIZE
(in.)
CFM
500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300
030-042 24 x 24 0.06 0.07 0.08 0.08 0.09 0.09 0.09 0.10 0.11 0.12 0.14 0.15 ———————
048, 060 24 x 30 — — — — — — — — 0.08 0.09 0.10 0.11 0.12 0.13 0.14 0.15 0.16 0.17 0.18
HEATER
kW
CFM
600 800 1000 1200 1400 1600 1800 2000 2200
5-20 0.06 0.08 0.10 0.13 0.15 0.18 0.20 0.23 0.25
LEGEND
BF — Bypass Factor
edb — Entering Dry-Bulb
Ewb — Entering Wet-Bulb
kW — Total Unit Power Input
Idb — Leaving Dry-Bulb
Iwb — Leaving Wet-Bulb
SHC — Sensible Heat Capacity (1000 Btuh) Net
TC — Total Capacity (1000 Btuh) Net
*At 75°F entering dry bulb (Tennessee Valley Authority [TVA] rating
conditions); all others at 80°F entering dry bulb.
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. The following formulas may be used:
tldb = tedb –
tlwb = Wet-bulb temperature corresponding to enthalpy of leaving
indoor coil (hlwb)
hlwb = hewb –
Where: hewb = Enthalpy of air entering evaporator coil
3. The sensible heat capacity is based on 80°F edb temperature of air
entering indoor coil.
Below 80°F edb, subtract (corr factor x cfm) from the sensible heat
capacity.
Above 80°F edb, add (corr factor x cfm) to the sensible heat capacity.
Correction Factor = 1.10 x (1–BF) x (edb – 80).
sensible capacity (Btuh)
1.10 x cfm
total capacity (Btuh)
4.5 x cfm

16
50ZH
Performance data (cont)
DRY COIL AIR DELIVERY* — HORIZONTAL DISCHARGE
(Deduct 10% for 208 Volt Operation)
*Air delivery values are based on operating voltage of 230 v or 460 v, wet coil, without filter or electric heater. Deduct filter and electric heater pressure
drops to obtain static pressure available for ducting.
NOTES:
1. Do not operate the unit at a cooling ariflow that is less than 350 cfm for each 12,000 Btuh of rated cooling capacity. Evaporator coil frosting may
occur at airflows below this point.
2. Dashes indicate portions of table that are beyond the blower motor capacity or are not recommended.
† 460-v motors have 2 speeds (060 only).
230 AND 460 VOLT HORIZONTAL DISCHARGE
Unit
50ZH
Motor
Speed
Air
Delivery
External Static Pressure (in.wg)
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
030
Low Watts 288 285 282 279 274 268 261 — —
CFM 875 820 802 734 668 582 478 — —
Med Watts 390 383 378 369 360 350 340 — —
CFM 1131 1090 1038 978 917 830 721 — —
High Watts 528 520 510 495 480 460 450 — —
CFM 1891 1338 1285 1200 1115 1018 920 — —
036
Low Watts 450 435 420 400 380 335 326 311 —
CFM 1231 1218 1204 1120 1008 950 863 751 —
Med Watts 470 450 445 410 388 359 338 321 —
CFM 1302 1264 1205 1163 1081 940 873 783 —
High Watts 660 635 610 575 540 505 485 460 —
CFM 1700 1660 1581 1450 1297 1190 1095 989 —
042
Low Watts 478 458 440 411 378 350 327 317 —
CFM 1303 1270 1224 1179 1126 1022 911 816 —
Med Watts 481 468 450 438 404 370 338 320 —
CFM 1310 1280 1241 1181 1110 1022 943 811 —
High Watts — 798 678 647 618 578 540 500 460
CFM — 1736 1688 1618 1510 1421 1309 1187 1060
048
Low Watts — — 801 760 730 688 650 600 570
CFM — — 1898 1841 1757 1682 1564 1429 1333
High Watts — — 870 842 818 782 696 632 628
CFM — — 2000 1903 1799 1718 1625 1446 1365
060†
Low Watts 890 850 810 790 735 680 580 480 422
CFM 1834 1820 1791 1762 1703 1640 1415 1159 950
Med Watts 1040 1018 1000 950 890 835 7990 650 580
CFM 2230 2102 2025 1960 1901 1855 1752 1468 1121
High Watts 1073 1038 1001 958 896 840 800 691 575
CFM 2230 2202 2160 2122 2052 1926 1791 1588 1202

17
50ZH
Electrical data
UNIT
SIZE
50ZH
(–SERIES)
NOMINAL
V-PH-Hz
IFM
TYPE
VOLTAG E
RANGE COMPRESSOR OFM
FLA
IFM
FLA
ELECTRIC HEAT POWER SUPPLY
Min Max RLA LRA Nominal kW* FLA MCA
MAX FUSE
OR CKT. BKR. MOCP
030 208/230-3-60 Std 187 254 10.0 63.0 1.5 2.8
—/—
3.8/5.0
7.5/10.0
11.3/15.0
—/—
10.5/12.0
20.8/24.1
31.4/36.1
16.8/16.8
29.9/31.8
42.8/46.9
56.1/61.9
20/20
30/35
45/50
—/—
—
—
—
60/70
036
208/230-3-60 Std 187 254 11.4 77.0 1.5 2.8
—/—
3.8/5.0
7.5/10.0
11.3/15.0
—/—
10.5/12.0
20.8/24.1
31.4/36.1
18.6/18.6
31.1/23.6
44.6/48.7
57.8/63.7
25/25
35/35
45/50
60/—
—
—
—
—/70
460-3-60 Std 414 508 5.7 39.0 0.8 1.5
—/—
5.0
10.0
15.0
—/—
6.0
12.0
18.0
9.9
16.9
24.4
31.9
15
20
25
35
—
—
—
—
042
208/230-3-60 Std 187 254 13.9 88.0 1.5 2.8
—/—
3.8/5.0
7.5/10.0
11.3/15.0
15.0/20.0
—/—
10.5/12.0
20.8/24.1
31.4/36.1
41.4/47.9
21.7/21.7
34.8/36.7
47.7/51.8
60.9/66.8
73.4/81.6
30/30
35/40
50/50
—
—
—
—
—
70/70
80/90
460-3-60 Std 414 508 6.8 44.0 0.8 1.5
—/—
5.0
10.0
15.0
20.0
—/—
6.0
12.0
18.0
24.1
10.8
18.3
25.8
33.3
40.9
15
20
30
35
45
—
—
—
—
—
048
208/230-3-60 Std 187 254 12.8 93.0 1.5 4.2
—/—
3.8/5.0
7.5/10.0
11.3/15.0
15.0/20.0
—/—
18.3/20.8
36.1/41.7
54.3/62.5
72.1/83.3
21.7/21.7
34.8/36.7
47.7/51.8
61.0/66.8
73.7/81.8
25/25
35/40
50/60
—
—
—
—
—
70/70
80/90
460-3-60 Std 414 508 6.4 46.5 0.8 2.1
—/—
5.0
10.0
15.0
20.0
—/—
6.0
12.0
18.0
24.1
10.9
18.4
25.9
33.4
41.0
15
20
30
35
45
—
—
—
—
—
060
208/230-3-60 Std 187 254 15.9 124.0 3.1 6.2
—/—
3.8/5.0
7.5/10.0
11.3/15.0
14.9/19.9
—/—
10.5/12.0
20.8/24.1
31.4/36.1
41.4/47.9
29.2/29.2
42.3/44.2
55.2/59.3
68.4/74.3
81.2/89.3
35/35
45/45
60/60
—
—
—
—
—
70/80
90/90
460-3-60 Std 414 508 8.0 59.6 1.5 3.2
—/—
5.0
10.0
15.0
20.0
—/—
6.0
12.0
18.0
24.1
14.7
22.2
29.7
37.2
44.8
20
25
30
40
45
—
—
—
—
—

18
50ZH
Typical wiring schematic — 208/230-3-60

19
50ZH
Typical wiring schematic — 460-3-60

20
50ZH
Typical wiring schematic (cont)
Electric Heater Wiring
C
W1
W1
TO
UNIT POWER
WIRING
BLK
YEL
BRN (COMMON)
VIO (STEP 2)
WHT ( STEP 1)
CONTACTOR 2
YEL
BRN
YEL
CONTACTOR 1
YEL
YEL
BRN
YEL
YEL
FUSE BLOCK
L2
L1
YEL
YEL
BLK
BLK
F3
F4
F1
F2
EL 1
EL 2
EL 3
BLK
BLK
BLK
AUTO-LIMIT
452=5v
457=7v
455=2v
LEGEND
FLA — Full Load Amps
LRA — Locked Rotor Amps
MCA — Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection
RLA —Rated Load Amps
NOTES:
1. In compliance with NEC (National Electrical Code) requirements
for multimotor and combination load equipment (refer to NEC
Articles 430 and 440), the overcurrent protective device for the
unit shall be Power Supply fuse. The CGA (Canadian Gas
Association) units may be fuse or circuit breaker.
2. Minimum wire size is based on 60 C copper wire. If other than
60 C wire is used, or if length exceeds wire length in table,
determine size from NEC.
3. Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase imbalance in supply volt-
age is greater than 2%.
Use the following formula to determine
the percentage of voltage imbalance.
% Voltage imbalance
max voltage deviation from average voltage
= 100 x average voltage
EXAMPLE: Supply voltage is 460-3-60.
AB = 452 v
BC = 464 v
AC = 455 v
452 + 464 + 455
Average Voltage = 3
1371
=3
= 457
Determine maximum deviation from average voltage.
(AB) 457
(BC) 464
(AC) 457
Maximum deviation is 7 v.
Determine percent of voltage imbalance.
7
% Voltage Imbalance = 100 x 457
= 1.53%
This amount of phase imbalance is satisfactory as it is below the
maximum allowable 2%.
IMPORTANT: If the supply voltage phase imbalance is
more than 2%, contact your local electric utility company
immediately.
®
*Heater capacity (KW) based on heater voltage of 208v, 240v, & 480v.
If power distribution voltage to unit varies from rated heater voltage,
heater KW will vary accordingly.