Carrier 50JZ 024-060 Operation manual

Product
Data
50JZ
Single-Package
Heat Pump
Units
with Puron® (R-410A) Refrigerant
2 to 5 Nominal Tons
Copyright 2000 Carrier Corporation Form 50JZ-1PD
Single-Package Products with
Energy-Saving Features and Puron®
refrigerant.
• 12 SEER
• HSPF up to 7.2
• Low Sound Levels
Features/Benefits
One-piece Heat Pump unit with
optional electric heater, low
installation cost, dependable
performance and easy maintenance.
Efficient operation
High-efficiency design with SEERs
(Seasonal Energy Efficiency Ratio)
of 12.0.
Puron® Environmentally Sound
Refrigerant
is Carrier’s unique
refrigerant designed to help protect the
environment. Puron is an HFC
refrigerant which does not contain
chlorine that can harm the ozone layer.
The most important advantage of
Puron refrigerant is that it has not been
banned in future air conditioning
systems as the traditional refrigerant
R-22 has been. Puron refrigerant is in
service in over 100,000 systems
proving highly reliable,
environmentally sound performance.
Easy Installation
Factory-assembled package is a
compact, fully self-contained, heat
pump unit that is pre-wired, pre-piped,
and pre-charged for minimum
installation expense. 50JZ units are
available in a variety of standard
capacityrangeswithvoltageoptionsto
meet residential and light commercial
requirements. Units install easily on a
rooftop or at ground-level.
Durable, dependable
components
Compressors are designed for high
efficiency. Each compressor is
hermetically sealed against
contamination to help promote longer
life and dependable operation.
UNIT 50JZ

2
Vibration isolation provides quiet
operation. Compressors have internal
high-pressure and overcurrent
protection.
Convertible duct configuration
Unit is designed for easy use in either
downflow or horizontal applications.
Each unit is easily converted from
horizontal to downflow and include
horizontal duct covers.
Direct-drive multi-speed, PSC
(permanent split capacitor) blower
motor
is standard on all 50JZ models.
Direct-drive, PSC condenser-fan
motors
are designed to help reduce
energy consumption and provide for
coolingoperationdownto40°Foutdoor
temperature. Motormaster® II low
ambient kit is available as a field-
installed accessory.
Corporate thermostats include the
Time Guard® II anti-short cycle
protection circuitry. If a non-Carrier
thermostat is used the Time Guard II
field installed anti-short cycle kit is
recommended.
Refrigerant system is designed to
providedependability.Liquidrefrigerant
filter driers are used to promote clean,
unrestricted operation. Each unit leaves
thefactorywithafullPuron®refrigerant
charge. Refrigerant service connections
make checking operating pressures
easier.
Indoor and Outdoor coils are
computer-designed for optimum heat
transfer and cooling efficiency. The
indoor coil is fabricated from copper
tube and aluminum fins and is located
inside the unit for protection against
damage. The outdoor coil is internally
mounted on the top tier of the unit.
Copperfincoils and pre-coated fincoils
areavailablefrom the factorybyspecial
order. These coils are recommended in
applications where aluminum fins are
likely to be damaged due to corrosion.
They are ideal for seacoast applications.
High and Low Pressure Switches give
added safety and reliability to the
compressor.
Low sound ratings ensure a quiet
indoor and outdoor environment with
sound ratings as low as 72 dB.
(See page 3.)
Easy to service cabinets provide easy
single-panelaccessibility toserviceable
components during maintenance and
installation. The basepan with
integrated drain pan provides easy
groundlevelinstallationwithorwithout
a mounting pad. Convenient handholds
are provided to manipulate the unit on
the jobsite. A nesting feature ensures a
positive basepan to roof curb seal when
the unit is roof mounted. A convenient
3/4-in. wide perimeter flange makes
frame mounting on a rooftop easy.
Louvered Grille provides hail and
vandalism protection for the coil.
Downflowoperation iseasily provided
in the field to allow vertical ductwork
connections. The basepan utilizes
knockout style seals on the bottom
openings to ensure a positive seal in the
horizontal airflow mode.
Cabinets are constructed of heavy-
duty, phosphated, zinc-coated
prepainted steel capable of
withstanding 500 hrs of salt spray.
Interior surfaces of the evaporator and
electric heater compartments are
insulated with cleanable semi-rigid
insulation board, which keeps the
conditioned air from being affected by
the outdoor ambient temperature and
provides improved indoor air quality.
(Conforms to American Society of
Heating, Refrigeration and Air
Conditioning Engineers No. 62P.) The
sloped drain pan minimizes standing
water in the drain, which is provided
with an external drain.
Standard metal duct covers with
insulation come with the unit and cover
the horizontal duct openings. These can
be left in place if the units are converted
to downshot.
Table of contents
Page
Features/Benefits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,2
Model Number Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
ARI Capacities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Options and Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5,6
Base Unit Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7,8
Accessory Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-18
Typical Piping and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Application Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Electrical Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21,22
Typical Wiring Schematics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-25
Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Guide Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27-28

3
Model number nomenclature
ARI* capacities
COOLING CAPACITIES AND EFFICIENCIES
50JZ 024
Model No.
50JZ – Single Package
........ . Heat Pump
Nominal Cooling Capacity (Tons)
024 – 2
030 – 2-1/2
036 – 3
042 – 3-1/2
048 – 4
060 – 5
UNIT
50JZ NOMINAL TONS STANDARD CFM
NET COOLING
CAPACITIES
(Btuh) SEER† SOUND
RATINGS‡
(dB)
024 2 800 24,000 12.0 72
030 2-1/2 1000 29,000 12.0 72
036 3 1200 36,000 12.0 77
042 3-1/2 1400 41,000 12.0 73
048 4 1600 47,500 12.0 79
060 5 1750 58,000 12.0 79
HEATING CAPACITIES AND EFFICIENCIES
UNIT
50JZ HIGH HEAT CAPACITY (BTUH) @ 47°F HIGH HEAT COP @ 47°F‡ LOW HEAT CAPACITY (BTUH) @ 17°F‡ LOW HEAT COP @ 17°F‡ HSPF
024 23,800 3.0 13,000 2.0 7.0
030 28,200 3.0 15,600 2.0 7.1
036 34,400 3.0 18,000 2.0 7.2
042 40,000 3.0 22,000 2.0 7.2
048 44,000 3.0 23,600 2.0 7.2
060 55,000 3.0 31,000 2.0 7.2
301BT
Options
(None) – Wire Grille
AD – Louvered Grille
BT – Wire Grille and Vinyl-Coated Condenser
Coil Fin
XT – Louvered Grille and Vinyl-Coated Con-
denser Coil Fin
CC – Wire Grille, AL Evaporator and CU/CU
Condenser Coil
AC – Louvered Grille, AL Evaporator and CU/
CU condenser Coil
AU – Louvered Grille, CU/CU Evaporator and
Condenser Coils
Packaging
Series
V-Ph-Hz
3 – 208/230-1-60
5 – 208/230-3-60
6 – 460-3-60
TT
Options
- - – Louvered Grille
BT – Louvered Grille, AL indoor
and vinyl-coated outdoor coil fin
CC – Louvered Grille, AL indoor and
CU/CU outdoor coil.
CU – Louvered Grille, CU/CU indoor and
outdoor coil.
AL — Aluminum
CU — Copper
LEGEND
dB — Sound Levels (decibels)
db — Dry Bulb
SEER — Seasonal Energy Efficiency Ratio
wb — Wet Bulb
COP — Coefficient of Performance
HSPF — Heating Season Performance Factor
* Air Conditioning & Refrigeration Institute.
† Rated in accordance with U.S. Government DOE (Department of
Energy) test procedures and/or ARI Standard 210/240-94.
‡ Tested in accordance with ARI Standard 270-95 (not listed in ARI).
NOTES:
1. Ratings are net values, reflecting the effects of circulating fan heat.
Ratings are based on:
Cooling Standard: 80°F db, 67°F wb indoor entering-air tempera-
ture and 95°F db outdoor entering-air temperature.
2. Before purchasing this appliance, read important energy cost and
efficiency information available from your retailer.

4
Physical data
* Required filter sizes shown are based on the larger of the ARI (Air Conditioning & Refrigeration Institute) rated
cooling airflow or the heating airflow velocity of 300 ft/minute for throwaway type or 450 ft/minute for high-
capacity type.Air filter pressure drop for non-standard filters must not exceed 0.08 in. wg.
UNIT SIZE 50JZ 024 030 036 042 048 060
NOMINAL CAPACITY (ton)
2 2-1/2 3 3-1/2 4 5
OPERATING WEIGHT (lb) 299 320 328 350 355 428
COMPRESSOR Scroll
REFRIGERANT (R-410A)
Quantity (lb)
7.0 8.9 9.3 9.5 10.6 12.4
REFRIGERANT METERING DEVICE
Orifice ID (in.)
Orifice OD (in.)
AccuRater® Piston
0.061
[email protected] 0.061 [email protected] 0.067 [email protected] 0.073 [email protected] 0.076 [email protected] 0.088 [email protected]
OUTDOOR COIL
Rows—Fins/in.
Face Area (sq ft)
2—17
8.5 2—17 10.3 2—17 10.3 2—17 13.5 2—17 13.5 2—17 15.4
OUTDOOR FAN
Nominal Cfm
Diameter (in.)
Motor Hp (Rpm)
2350
22
1/8 (825)
2350
22
1/8 (825)
2800
22
1/4 (1100)
2500
22
1/8 (825)
3300
22
1/4 (1100)
3300
22
1/4 (1100)
INDOOR COIL
Rows—Fins/in.
Face Area (sq ft)
3—15
3.7 3—15 3.7 4—15 3.7 3—15 4.7 4—15 4.7 4—15 5.7
INDOOR BLOWER
Nominal Airflow (Cfm)
Size (in.)
Motor (Hp)
800
10 x 10
1/4
1000
10 x 10
1/4
1200
10 x 10
1/2
1400
11 x 10
1/2
1600
11 x 10
1/2
1750
11 x 10
1.0
HIGH-PRESSURE SWITCH (psig)
Cutout
Reset (Auto.)
610 ± 15
420 ± 25
LOSS-OF-CHARGE/LOW-PRESSURE
SWITCH (Liquid Line) (psig)
Cutout
Reset (Auto.)
20 ± 5
45 ± 10
RETURN-AIR FILTERS (in.)*
Throwaway
20 x 20 x 1 20 x 20 x 1 20 x 24 x 1 24 x 30 x 1 24 x 30 x 1 24 x 30 x 1
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
OUTDOOR SOUND: OCTAVE BAND DATA—DECIBELS (L w(A))
MODEL NO. 50JZ
Frequency (Hz) 024 030 036 042 048 060
63
44.4 43.9 53.6 47.7 57.1 54.6
125 57.5 55.9 63.6 60.4 63.9 64.1
250 61.1 60.9 66.6 64.0 70.4 68.6
500 68.0 66.9 71.1 67.5 72.7 71.2
1000 68.4 67.2 73.2 68.9 73.7 73.9
2000 64.5 63.8 69.6 64.9 71.1 69.8
4000 59.0 62.4 65.9 62.0 66.7 68.1
8000 51.7 52.1 58.4 55.0 59.7 61.8

5
Factory-installed options
Coil options
include copper/copper and vinyl-coated
construction for refrigerant coils. Units are shipped
standard with copper tube/aluminum fin construction.
See model number nomenclature for coil options.
Field-installed accessories
Economizer with solid-state controls and
barometric relief dampers
includes filter racks and
provide outdoor air during cooling and reduce
compressor operation.
Manual outside air damper includes hood and filter
rack with adjustable damper blade for up to 25%
outdoor air.
Electric heaters provide additional heat in the unit
when required. Each package has a heater module that
slides into the controls compartment. 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.
Flat roof curbs in both 8 in. and 14 in. sizes are
available for roof mounted applications.
Square-to-round duct transition kit enables 024-048
size units to be fitted to 14 in. round ductwork.
Thermostats provide control for the system heating and
cooling functions. Thermostat models are available in
both programmable and non-programmable versions.
Lifting kit includes 4 metal brackets that fit into the
hand-holds, a support strap and two safety straps, is
available to assist in lifting this product onto a roof
application.
Crankcase heater provides anti-floodback protection
for low-load cooling applications.
Low-ambient kit (Motormaster II control) allows
the use of mechanical cooling down to outdoor
temperatures as low as 0°F.
Solid-state Time Guard II device provides short-
cycling protection for the compressor. Not required
with corporate electronic thermostats.
Filter rack features easy installation, serviceability,
and high-filtering performance for vertical
applications.
Compressor Hard start kit gives a boost to the
compressor motor at each start-up.
Economizer with Solid-State Controls and Barometric
Relief Dampers
Manual Air Damper (25% open)
Electric Heaters
Filter Rack
Flat Roof Curbs (8-in.and 14-in.)
Square-to-Round Duct Transition Kit
Thermostats
Crankcase Heater
Low Ambient Kit (Motormaster® II Control)
Solid-State Time Guard® II Device
Lifting Kit
Compressor Hard Start Kit
Options and accessories
ELECTRIC HEATERS
LEGEND
ODS — Order Distribution System
NOTE: Electric heaters are rated at 240v and 480v. Refer to Multiplication Factors table for other voltages.
MINIMUM AIRFLOW FOR RELIABLE ELECTRIC HEATER OPERATION
ODS CATALOG
ORDERING NO. NOMINAL CAPACITY (kW) USEDWITH SIZES
024 030 036 042 048 060
ELECTRIC HEATERS (208/230 — SINGLE PHASE — 60 Hz)
CPHEATER052A00
5.0 XXXXXX
CPHEATER050A00 10.0 XXXXXX
CPHEATER066A00 15.0 XXXXX
CPHEATER054A00 20.0 XXX
ELECTRIC HEATERS (208/230 — 3 PHASE — 60 Hz)
CPHEATER055A00
5.0 XXXXX
CPHEATER056A00 10.0 XXXXX
CPHEATER058A00 15.0 XXXXX
CPHEATER067A00 20.0 XXX
ELECTRIC HEATERS (460 V — 3 PHASE — 60 Hz)
CPHEATER060A00
5.0 XXXX
CPHEATER061A00 10.0 XXXX
CPHEATER062A00 15.0 XXXX
CPHEATER063A00 20.0 XXX
UNIT-50JZ 024 030 036 042 048 060
AIRFLOW
800 1000 1200 1400 1600 2000

6
ECONOMIZER
FILTER RACK MANUAL OUTSIDE AIR DAMPER
DAMPER
BLADE
MANUAL OUTSIDE
AIR HOOD
REPLACEMENT
PANEL
7

7
Base unit dimensions—50JZ024-036
REQ’D CLEARANCES FOR OPERATION AND SERVICING. IN.(MM)
EVAPORATOR COIL ACCESS SIDE ............. 36(914)
POWER ENTRY SIDE (EXCEPT FOR NEC REQUIREMENTS) . . 36 (914)
UNIT TOP..........................48(1219)
SIDE OPPOSITE DUCTS ...................36(914)
DUCT PANEL .......................12(304.8)*
*MINIMUM DISTANCES: IF UNIT IS PLACED LESS THAN 12 IN.(304.8 MM) FROM
WALL SYSTEM, THENTHE SYSTEM PERFORMANCE MAY BE COMPROMISED.
REQ’D CLEARANCES TO COMBUSTIBLE MAT’L. IN.(MM)
TOP OF UNIT.......................14(355.6)
DUCT SIDE OF UNIT.....................2(50.8)
SIDE OPPOSITE DUCTS ..................14(355.6)
BOTTOM OF UNIT .....................0.50 (12.7)
ELECTRIC HEAT PANEL ..................36(914.4)
NEC REQ’D CLEARANCES. IN.(MM)
BETWEEN UNITS, POWER ENTRY SIDE
UNIT AND UNGROUNDED SURFACES, POWER ENTRY SIDE
UNIT AND BLOCK OF CONCRETE WALLS AND OTHER
GROUNDED SURFACES, CONTROL BOX SIDE
..........42(1066.8)
. . 36 (914)
.......42(1066.8)
LEGEND
CG - CENTER OF GRAVITY
COND - CONDENSER
EVAP - EVAPORATOR
NEC - NATIONAL ELECTRICAL CODE
REQ'D - REQUIRED
NOTE: DIMENSIONS ARE IN IN.(MM)
44.5 [1.75]
UNIT ELECTRICAL
CHARACTERISTICS UNIT WEIGHT UNIT HEIGHT
in. [mm]
“A”
CENTER OF GRAVITY
in. [mm]
lb kg X Y Z
50JZ024 208/230-1-60 299 135.6 35.02 [889.5] 19.0 [482.6] 18.3 [463.6] 16.0 [406.4]
50JZ030 208/230-1-60, 208/230-3-60 320 145.2 37.02 [940.3] 20.0 [508.0] 19.3 [489.0] 17.6 [447.0]
50JZ036 208/230-1-60, 208/230-3-60, 460-3-60 328 148.8 37.02 [940.3] 20.0 [508] 19.0 [482.6] 16.5 [419.1]
50JZ 024-036 Dimensions

8
Base unit dimensions—50JZ042-060
REQUIRED CLEARANCE FOR OPERATION AND SERVICING in. [mm]
EVAP.COIL ACCESS SIDE..............................................................36.00 [914.0]
POWER ENTRY SIDE......................................................................36.00 [914.0]
(EXCEPT FOR NEC REQUIREMENTS)
UNIT TOP.......................................................................................48.00 [1219.0]
SIDE OPPOSITE DUCTS ................................................................36.00 [914.0]
DUCT PANEL...................................................................................12.00 [304.8] *
*MINIMUM DISTANCES: IF UNIT IS PLACED LESS THAN 12.00 [304.8] FROM
WALL SYSTEM, THEN SYSTEM PERFORMANCE MAYBE COMPROMISE.
REQUIRED CLEARANCETO COMBUSTIBLE MATL. in. [mm]
TOP OF UNIT...................................................................................14.00 [355.6]
DUCT SIDE OF UNIT.........................................................................2.00 [50.8]
SIDE OPPOSITE DUCTS ................................................................14.00 [355.6]
BOTTOM OF UNIT.............................................................................0.50 [12.7]
ELECTRIC HEAT PANEL.................................................................36.00 [914.4]
NEC. REQUIRED CLEARANCES. in. [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]
44.5 [1.75]
UNIT ELECTRICAL
CHARACTERISTICS UNIT WEIGHT UNIT HEIGHT
in. [mm]
“A”
CENTER OF GRAVITY
in. [mm]
lb kg X Y Z
50JZ042 208/230-1-60, 208/230-3-60, 460-3-60 350 158.8 40.98 [1040.9] 21.0 [533.4] 20.5 [520.7] 16.6 [421.6]
50JZ048 208-230-1-60, 208/230-3/60, 460-3-60 355 161.0 40.98 [1040.9] 20.0 [508.0] 21.3 [539.8] 18.0 [457.2]
50JZ060 208/230-1-60, 208/230-3-60, 460-3-60 428 194.1 42.98 [1091.7] 21.0 [533.4] 20.0 [508.0] 17.6 [447.0]
50JZ 042-060 Dimensions

9
Accessory dimensions
UNIT SIZE ODS CATALOG
ORDERING NO. A in. [mm] B in. [mm] C in. [mm] D in. [mm]
FLAT CURB 50JZ024-036 CPRFCURB006A00 8 [203] 11-27/32 [301] 30-5/8 [778] 28-3/4 [730]
CPRFCURB007A00 14 [356] 11-27/32 [301] 30-5/8 [778] 28-3/4 [730]
50JZ042-060 CPRFCURB008A00 8 [203] 15-27/32 [402] 42-1/8 [1070] 40-1/4 [1022]
CPRFCURB009A00 14 [356] 15-27/32 [402] 42-1/8 [1070] 40-1/4 [1022]
3.0" 4.0"
BASE PAN
BOTTOM SUPPLY
0.75"
SIDE PANEL
SUPPORT RIB(S)
COUNTER FLASHING
(FIELD SUPPLIED) NAILER
ROOFING FELT
(FIELD SUPPLIED)
CANT STRIP
(FIELD SUPPLIED)
ROOFING MATERIAL
(FIELD SUPPLIED)
INSULATION
(FIELD SUPPLIED)
SEAL STRIP
(FACTORY SUPPLIED)
Full Perimeter Curb
NOTES:
1. Roof curb must be set up for unit being installed.
2. Seal strip must be applied as required to unit being installed.
3. Dimensions in [ ] are in millimeters.
4. Roof curb is made of 16 gage steel.
5. Table lists only the dimensions per part number that have changed.
6. Attach ductwork to curb (Flanges of duct rest on curb).
7. Insulated panels: 1-in.thick fiberglass 1 lb density.
8. Dimensions are in inches.

10
I Determine cooling and heating requirements at design
conditions:
Given:
Required Cooling Capacity (TC) . . . . . . . . . 33,500 Btuh
Sensible Heat Capacity (SHC) . . . . . . . . . . . 24,500 Btuh
Required Heating Capacity . . . . . . . . . . . . . . 25,000 Btuh
Condenser Entering Air Temperature. . . . . . . . . . . . 95°F
Indoor-Air Temperature . . . . . . . . . . 80°F edb, 67°F ewb
Evaporator Air Quantity . . . . . . . . . . . . . . . . . . .1200 cfm
External Static Pressure. . . . . . . . . . . . . . . . . . . 0.2 in. wg
Electrical Characteristics. . . . . . . . . . . . . . . . . . . 208-1-60
II Select unit based on required cooling capacity.
Enter Net Cooling Capacities table at condenser entering
temperature of 95°F. The 50JZ036 unit at 1200 cfm and
67°F ewb (entering wet bulb) will provide a total capacity
of 36,600 Btuh and a SHC of 28,200 Btuh. Calculate SHC
correction, if required, using Note 4 under Cooling
Capacities tables.
III Select electric heat.
Enter the 50JZ036 unit Heating Extended Performance
table at 1200 cfm. At 70°F return indoor air and 20°F air
entering outdoor coil, the integrated heating capacity is
17,400 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 25,000 Btuh. Therefore,
7,600 Btuh (25,000 – 17,400) additional electric heat is
required
Determine additional electric heat capacity in kw.
7,600 Btuh
3414 Btuh/kW
Enter the Electric Heater table on page 5 for 208/230 v,
single-phase, unit. The 5-kw heater at 240v most closely
satisfies the heating required. To calculate kw at 230v,
multiply the heater kw by multiplication factor 0.92 found
in the Multiplication Factors table on page 17.
5 kw x 0.92 = 4.6 kw
4.6 kw x 3414 Btuh/kw = 15,704 Btuh
Total unit heating capacity is 33,104 Btuh (17,400 +
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, Filter Pressure
Drop Table, Electrical Heat Pressure Drop table, and the
Wet Coil Pressure Drop table, find:
External static pressure 0.200 in. wg
Filter 0.130 in. wg
Electric Heaters 0.000 in. wg
Total static pressure 0.330 in. wg
Enter the table for Wet Coil Air Delivery — Horizontal
Discharge, 230 and 460v. At 0.33 in. wg external static
pressure and medium speed, the motor delivers 1171 cfm,
and 467 watts. Adjusting for 208v, the motor delivers 1054
cfm (deduct 10%) and 420 watts.
V Select unit that corresponds to power source available.
The Electrical Data table shows that the unit is designed to
operate at 208-1-60.
= 2.2 kw of heat required
Selection Procedure

11
Performance data
COOLING EXTENDED PERFORMANCE TABLE
HEATING EXTENDED PERFORMANCE TABLE -10–20
HEATING EXTENDED PERFORMANCE TABLE 30–60
*At 75°F entering dry bulb—Tennessee Valley Authority [TVA] rating conditions; all others at 80°F entering dry bulb.
See Legend and Notes on page 17.
50JZ024 COOLING PERFORMANCE TABLE
Temp (F)
Outdoor Air
Entering
Condenser
Evaporator Air—CFM/BF
700/0.10 800/0.14 900/0.18
Evaporator Air — Ewb (F)
62 63* 67 72 62 63* 67 72 62 63* 67 72
75 TC 24.1 42.7 26.6 28.6 25.1 25.7 27.4 29.1 25.6 26.1 27.8 29.5 SHC 21.3 17.6 18.2 14.6 23.2 18.9 19.4 15.2 24.5 19.9 20.3 15.7
kW 1.86 1.86 1.87 1.89 1.87 1.87 1.88 1.89 1.87 1.87 1.88 1.90
85 TC 22.8 23.7 25.1 26.9 23.7 24.2 25.7 27.4 24.1 24.6 26.1 27.7 SHC 20.6 17.2 17.4 13.9 22.3 18.1 18.5 14.4 23.4 19.1 19.3 14.9
kW 2.05 2.06 2.06 2.08 2.06 2.06 2.06 2.08 2.06 2.06 2.07 2.09
95 TC 21.5 22.2 23.3 24.7 22.1 22.5 23.8 25.1 22.5 22.8 24.1 25.4 SHC 19.9 16.5 16.4 12.8 21.2 17.3 17.3 13.3 22.1 18.1 18.0 13.7
kW 2.26 2.26 2.27 2.29 2.26 2.27 2.28 2.29 2.27 2.27 2.28 2.30
105 TC 18.5 19.3 20.0 21.1 19.0 19.4 20.4 21.5 19.4 19.6 20.6 21.7
SHC 17.6 14.8 14.4 11.1 18.7 15.4 15.1 11.6 19.3 16.0 15.7 11.9
kW 2.54 2.53 2.55 2.57 2.55 2.53 2.56 2.58 2.55 2.54 2.56 2.58
115 TC 17.0 17.4 18.4 19.4 17.5 17.7 18.7 19.8 17.9 17.9 18.9 19.8
SHC 16.6 13.9 13.6 10.4 17.5 14.5 14.3 10.8 17.9 15.1 14.8 11.0
kW 2.80 2.80 2.81 2.82 2.80 2.81 2.82 2.80 2.81 2.81 2.82 2.82
125 TC 15.4 15.7 16.7 17.6 16.0 15.9 16.9 17.8 16.4 16.1 17.1 17.8
SHC 15.3 13.0 12.8 9.6 16.0 13.7 13.5 9.9 16.4 14.3 14.0 10.1
kW 3.09 3.11 3.10 3.11 3.06 3.12 3.13 3.14 3.10 3.12 3.13 3.14
50JZ024
Return
Air (F db) CFM (Standard Air) Air Temperature Entering Outdoor Coil (F db at 70% rh)
-100 101720
60
700 TC 7.1 6.5 9.5 8.7 12.0 10.9 14.0 12.7 14.9 13.4
kW 1.53 1.61 1.69 1.76 1.79
800 TC 7.1 6.6 9.7 8.9 12.2 11.2 14.3 13.0 15.2 13.7
kW 1.57 1.63 1.68 1.75 1.77
900 TC 7.3 6.7 9.8 9.1 12.4 11.4 14.4 13.2 15.5 14.0
kW 1.59 1.64 1.69 1.74 1.76
70
700 TC 6.2 5.7 8.8 8.0 11.3 10.4 13.3 12.1 14.3 12.9
kW 1.72 1.79 1.87 1.93 1.95
800 TC 6.4 5.9 9.0 8.3 11.6 10.6 13.6 12.4 14.6 13.2
kW 1.73 1.79 1.86 1.91 1.93
900 TC 6.6 6.1 9.2 8.4 11.8 10.9 13.9 12.6 14.9 13.4
kW 1.75 1.80 1.86 1.90 1.92
80
700 TC 5.5 5.1 8.0 7.4 10.5 9.7 12.6 11.5 13.5 12.2
kW 1.86 1.96 2.05 2.13 2.16
800 TC 5.6 5.2 8.2 7.5 10.9 9.9 12.9 11.8 13.9 12.5
kW 1.90 1.97 2.04 2.11 2.12
900 TC 5.8 5.3 8.4 7.7 11.0 10.1 13.2 12.0 14.2 12.8
kW 1.91 1.98 2.04 2.10 2.11
50JZ024
Return
Air (F db) CFM (Standard Air) Air Temperature Entering Outdoor Coil (F db at 70% rh)
30 40 47 50 60
60
700 TC 18.1 15.8 21.7 21.7 24.4 24.4 25.3 25.3 27.9 27.9
kW 1.90 1.99 2.09 2.12 2.22
800 TC 18.5 16.2 22.1 22.1 24.7 24.7 25.3 25.3 28.1 28.1
kW 1.86 1.94 2.04 2.05 2.14
900 TC 18.9 16.6 22.4 22.4 25.0 25.0 25.5 25.5 28.3 28.3
kW 1.82 1.92 2.01 2.01 2.11
70
700 TC 17.6 15.4 21.1 21.1 23.9 23.9 24.8 24.8 27.7 27.7
kW 2.03 2.16 2.29 2.34 2.47
800 TC 17.9 15.7 21.4 21.4 24.4 24.4 25.2 25.2 28.6 28.6
kW 2.00 2.13 2.24 2.28 2.42
900 TC 18.3 16.0 21.8 21.8 24.7 24.7 25.5 25.5 28.9 28.9
kW 1.98 2.10 2.22 2.24 2.36
80
700 TC 16.7 14.7 20.5 20.5 23.3 23.3 24.1 24.1 27.8 27.8
kW 2.27 2.37 2.51 2.56 2.76
800 TC 17.4 15.2 20.8 20.8 23.7 23.7 24.6 24.6 28.5 28.5
kW 2.17 2.31 2.46 2.50 2.70
900 TC 17.6 15.5 21.2 21.2 24.1 24.1 24.9 24.9 28.7 28.7
kW 2.15 2.28 2.42 2.47 2.62

12
Performance data (cont)
COOLING EXTENDED PERFORMANCE TABLE
HEATING EXTENDED PERFORMANCE TABLE -10–20
HEATING EXTENDED PERFORMANCE TABLE 30–60
*At 75°F entering dry bulb—Tennessee Valley Authority [TVA] rating conditions; all others at 80°F entering dry bulb.
See Legend and Notes on page 17.
50JZ030 COOLING PERFORMANCE TABLE
Temp (F)
Outdoor Air
Entering
Condenser
Evaporator Air—CFM/BF
875/0.08 1000/0.09 1125/0.10
Evaporator Air — Ewb (F)
62 63* 67 72 62 63* 67 72 62 63* 67 72
75 TC 28.1 28.5 30.8 33.2 29.1 29.5 31.8 33.7 30.5 30.5 32.8 34.5 SHC 26.0 21.2 21.8 17.4 28.2 22.8 23.3 18.0 30.5 25.3 25.3 18.9
kW 2.17 2.25 2.19 2.21 2.18 2.26 2.20 2.21 2.19 2.26 2.20 2.22
85 TC 26.3 26.8 29.6 32.1 27.0 27.7 30.5 32.8 29.4 29.0 31.4 33.4 SHC 24.7 20.4 21.5 17.1 26.6 22.0 23.1 17.9 29.4 25.1 25.3 18.8
kW 2.39 2.49 2.44 2.45 2.38 2.50 2.44 2.45 2.43 2.52 2.44 2.46
95 TC 24.9 25.4 27.9 30.9 25.7 25.9 28.9 31.5 28.3 27.0 29.8 32.1 SHC 23.7 19.6 21.0 16.7 25.7 21.1 22.7 17.5 28.3 24.2 25.4 18.6
kW 2.65 2.75 2.69 2.71 2.67 2.76 2.71 2.71 2.71 2.78 2.70 2.72
105 TC 23.4 22.2 26.1 29.2 24.3 23.1 26.9 29.8 26.5 25.0 27.9 30.5
SHC 22.5 17.2 20.2 16.2 24.3 19.0 21.9 17.1 26.5 22.8 24.7 18.4
kW 2.92 2.99 2.98 2.99 2.94 3.02 2.99 3.00 2.98 3.06 2.99 3.00
115 TC 21.7 19.0 24.2 27.4 22.9 20.3 24.9 27.8 24.7 22.9 25.8 28.5
SHC 21.4 14.7 19.4 15.5 22.9 16.8 21.0 16.4 24.7 21.8 23.8 17.9
kW 3.24 3.23 3.28 3.28 3.25 3.27 3.29 3.30 3.29 3.37 3.30 3.30
125 TC 19.9 19.3 22.1 25.1 21.3 19.9 22.6 25.5 22.9 21.0 23.5 26.1
SHC 19.9 17.4 18.1 14.6 21.3 18.5 19.8 15.6 22.9 21.0 22.7 17.1
kW 3.57 3.65 3.60 3.62 3.58 3.67 3.61 3.62 3.62 3.71 3.62 3.62
50JZ030
Return
Air (F db) CFM (Standard Air) Air Temperature Entering Outdoor Coil (F db at 70% rh)
-100 101720
60
875 TC 7.7 6.5 10.8 9.2 14.0 12.9 16.6 15.2 17.9 16.1
kW 1.93 2.00 2.08 2.08 2.11
1000 TC 7.8 6.6 11.0 9.3 14.2 13.0 16.8 15.3 18.0 16.2
kW 1.90 1.97 2.04 2.04 2.07
1125 TC 7.8 6.6 11.0 9.4 14.3 13.1 16.9 15.4 18.1 16.3
kW 1.89 1.94 2.00 2.00 2.03
70
875 TC 6.9 5.9 10.1 8.6 13.3 12.2 15.8 14.4 17.0 15.4
kW 2.11 2.20 2.29 2.35 2.37
1000 TC 7.2 6.1 10.3 8.8 13.5 12.4 16.1 14.7 17.3 15.6
kW 1.98 2.11 2.24 2.24 2.27
1125 TC 7.1 6.0 10.3 8.8 13.6 12.5 16.2 14.8 17.4 15.7
kW 2.09 2.15 2.21 2.20 2.23
80
875 TC 6.1 5.1 9.3 7.9 12.5 11.5 15.0 13.7 16.2 14.6
kW 2.30 2.40 2.51 2.59 2.60
1000 TC 6.1 5.2 9.4 8.0 12.7 11.6 15.2 13.9 16.4 14.8
kW 2.28 2.37 2.46 2.53 2.54
1125 TC 6.2 5.3 9.5 8.1 12.8 11.8 15.5 14.1 16.7 15.0
kW 2.28 2.35 2.43 2.42 2.45
50JZ030
Return
Air (F db) CFM (Standard Air) Air Temperature Entering Outdoor Coil (F db at 70% rh)
30 40 47 50 60
60
875 TC 22.0 19.2 26.3 26.3 29.7 29.7 30.7 30.7 35.0 35.0
kW 2.22 2.35 2.46 2.48 2.61
1000 TC 22.1 19.4 26.5 26.5 29.7 29.7 30.8 30.8 35.2 35.2
kW 2.16 2.28 2.36 2.39 2.51
1125 TC 22.2 19.5 26.6 26.6 29.8 29.8 30.9 30.9 35.2 35.2
kW 2.12 2.22 2.30 2.32 2.43
70
875 TC 21.1 18.5 25.7 25.7 29.0 29.0 30.4 30.4 34.7 34.7
kW 2.43 2.58 2.70 2.76 2.88
1000 TC 21.3 18.7 25.9 25.9 29.3 29.3 30.6 30.6 35.1 35.1
kW 2.37 2.50 2.62 2.66 2.78
1125 TC 21.4 18.8 26.0 26.0 29.5 29.5 30.8 30.8 35.2 35.2
kW 2.32 2.44 2.55 2.58 2.70
80
875 TC 20.4 17.9 25.0 25.0 28.2 28.2 29.7 29.7 34.5 34.5
kW 2.65 2.82 2.95 3.02 3.23
1000 TC 20.6 18.0 25.3 25.3 28.5 28.5 29.9 29.9 34.7 34.7
kW 2.59 2.74 2.86 2.92 3.09
1125 TC 20.7 18.2 25.4 25.4 28.8 28.8 30.2 30.2 34.9 34.9
kW 2.54 2.67 2.79 2.84 2.99

13
Performance data (cont)
COOLING EXTENDED PERFORMANCE TABLE
HEATING EXTENDED PERFORMANCE TABLE -10–20
HEATING EXTENDED PERFORMANCE TABLE 30–60
*At 75°F entering dry bulb—Tennessee Valley Authority [TVA] rating conditions; all others at 80°F entering dry bulb.
See Legend and Notes on page 17.
50JZ036 COOLING PERFORMANCE TABLE
Temp (F)
Outdoor Air
Entering
Condenser
Evaporator Air—CFM/BF
1050/0.07 1200/0.08 1350/0.10
Evaporator Air — Ewb (F)
62 63* 67 72 62 63* 67 72 62 63* 67 72
75 TC 35.9 36.2 39.8 42.4 37.0 37.1 40.5 42.8 37.6 37.2 40.5 42.8 SHC 32.7 26.5 27.7 22.2 35.2 28.1 29.0 22.9 36.7 29.1 29.8 23.2
kW 2.66 2.76 2.70 2.70 2.76 2.87 2.80 2.81 2.87 3.03 2.96 2.96
85 TC 33.9 34.0 38.0 41.4 35.0 34.8 38.9 41.9 35.9 35.0 39.0 41.9 SHC 31.9 25.5 27.3 22.0 34.4 27.2 28.9 22.7 35.6 28.4 29.9 23.1
kW 2.91 3.04 2.98 2.98 3.01 3.17 3.09 3.09 3.11 3.32 3.25 3.25
95 TC 31.7 31.6 36.1 39.8 32.7 32.3 36.6 40.3 33.9 32.5 36.8 40.3 SHC 30.5 24.3 26.6 21.4 32.7 25.9 28.2 22.3 33.9 27.1 29.4 22.8
kW 3.16 3.32 3.31 3.29 3.25 3.45 3.40 3.40 3.39 3.60 3.55 3.56
105 TC 28.5 28.0 32.0 36.1 29.7 28.7 32.7 36.6 30.6 28.8 32.9 36.6
SHC 27.9 22.3 24.3 19.8 29.7 23.8 26.1 20.8 30.6 25.0 27.4 21.3
kW 3.52 3.69 3.67 3.70 3.62 3.82 3.81 3.81 3.78 3.97 3.95 3.97
115 TC 26.1 25.4 29.0 33.5 27.5 25.9 29.6 33.8 28.3 26.0 29.8 33.7
SHC 26.0 21.1 22.9 18.8 27.5 22.5 24.5 19.7 28.3 23.6 25.9 20.3
kW 3.85 4.00 4.01 4.05 3.96 4.15 4.13 4.18 4.11 4.28 4.29 4.33
125 TC 23.9 22.2 26.0 29.9 25.2 22.6 26.5 30.4 25.8 23.0 26.6 30.3
SHC 23.9 19.5 21.5 17.4 25.2 20.9 23.1 18.4 25.8 21.9 24.2 19.1
kW 4.26 4.41 4.40 4.48 4.38 4.51 4.52 4.60 4.54 4.64 4.66 4.76
50JZ036
Return
Air (F db) CFM (Standard Air) Air Temperature Entering Outdoor Coil (F db at 70% rh)
-100 101720
60
1050 TC 7.2 6.1 11.2 9.5 15.3 14.0 18.4 16.7 19.9 18.0
kW 2.43 2.47 2.51 2.54 2.56
1200 TC 7.4 6.3 11.5 9.8 15.6 14.3 18.7 17.0 20.2 18.2
kW 2.47 2.50 2.53 2.55 2.57
1350 TC 7.6 6.5 11.7 10.0 15.8 14.5 19.0 17.3 20.6 18.5
kW 2.51 2.53 2.56 2.57 2.60
70
1050 TC 6.3 5.4 10.3 8.7 14.2 13.1 17.4 15.9 19.0 17.1
kW 2.64 2.68 2.73 2.77 2.79
1200 TC 6.5 5.6 10.5 9.0 14.5 13.3 17.8 16.2 19.3 17.4
kW 2.68 2.71 2.75 2.78 2.79
1350 TC 6.7 5.7 10.8 9.2 14.8 13.6 18.1 16.5 19.7 17.7
kW 2.72 2.75 2.77 2.79 2.81
80
1050 TC 5.2 4.4 9.2 7.8 13.2 12.1 16.3 14.8 17.8 16.1
kW 2.86 2.91 2.97 3.01 3.03
1200 TC 5.4 4.6 9.5 8.0 13.5 12.4 16.7 15.2 18.2 16.4
kW 2.90 2.94 2.98 3.02 3.03
1350 TC 5.6 4.8 9.7 8.2 13.8 12.6 17.0 15.5 18.6 16.7
kW 2.94 2.98 3.01 3.03 3.05
50JZ036
Return
Air (F db) CFM (Standard Air) Air Temperature Entering Outdoor Coil (F db at 70% rh)
30 40 47 50 60
60
1050 TC 25.1 22.0 30.9 30.9 35.2 35.2 36.9 36.9 42.8 42.8
kW 2.65 2.80 2.89 2.92 3.02
1200 TC 25.5 22.3 31.4 31.4 35.8 35.8 37.3 37.3 43.2 43.2
kW 2.65 2.79 2.86 2.88 2.96
1350 TC 25.8 22.6 31.8 31.8 36.1 36.1 37.7 37.7 43.9 43.9
kW 2.67 2.79 2.85 2.86 2.94
70
1050 TC 24.1 21.1 30.1 30.1 34.6 34.6 36.3 36.3 42.7 42.7
kW 2.85 3.00 3.16 3.21 3.34
1200 TC 24.5 21.5 30.6 30.6 35.2 35.2 36.9 36.9 43.2 43.2
kW 2.85 2.99 3.13 3.17 3.27
1350 TC 24.9 21.8 31.0 31.0 35.7 35.7 37.4 37.4 43.6 43.6
kW 2.86 3.00 3.12 3.14 3.23
80
1050 TC 22.9 20.1 28.8 28.8 33.5 33.5 35.2 35.2 42.2 42.2
kW 3.10 3.21 3.40 3.45 3.68
1200 TC 23.4 20.5 29.3 29.3 34.1 34.1 35.8 35.8 42.8 42.8
kW 3.09 3.20 3.37 3.42 3.60
1350 TC 23.8 20.9 29.7 29.7 34.6 34.6 36.3 36.3 43.2 43.2
kW 3.09 3.20 3.35 3.40 3.55

14
Performance data (cont)
COOLING EXTENDED PERFORMANCE TABLE
HEATING EXTENDED PERFORMANCE TABLE -10–20
HEATING EXTENDED PERFORMANCE TABLE 30–60
*At 75°F entering dry bulb—Tennessee Valley Authority [TVA] rating conditions; all others at 80°F entering dry bulb.
See Legend and Notes on page 17.
50JZ042 COOLING PERFORMANCE TABLE
Temp (F)
Outdoor Air
Entering
Condenser
Evaporator Air—CFM/BF
1225/0.11 1400/0.12 1575/0.14
Evaporator Air — Ewb (F)
62 67 72 62 67 72 62 67 72
75 TC 41.2 44.8 47.0 42.5 45.7 47.6 43.3 46.1 48.0 SHC 37.4 31.4 24.8 40.2 33.3 25.8 42.2 34.6 26.5
kW 3.08 3.10 3.11 3.09 3.11 3.12 3.10 3.11 3.13
85 TC 39.1 42.9 45.9 40.3 43.9 46.5 41.3 44.4 46.8 SHC 36.3 30.8 24.3 39.1 32.8 25.3 40.8 34.1 26.1
kW 3.39 3.42 3.44 3.41 3.42 3.44 3.42 3.46 3.45
95 TC 36.0 40.7 44.0 38.1 41.7 44.5 39.3 42.2 44.7 SHC 34.4 29.8 23.6 38.1 31.8 24.6 39.3 33.5 25.5
kW 3.68 3.76 3.81 3.75 3.76 3.82 3.76 3.76 3.81
105 TC 32.9 36.9 39.6 34.5 37.9 40.1 35.8 38.2 40.5
SHC 31.9 27.8 21.6 34.5 29.9 22.7 35.8 31.3 23.5
kW 4.16 4.21 4.22 4.20 4.20 4.23 4.20 4.20 4.23
115 TC 30.9 33.7 36.4 32.2 34.4 36.9 33.2 34.9 37.1
SHC 30.4 26.2 20.3 32.2 28.1 21.3 33.2 29.6 22.1
kW 4.59 4.61 4.62 4.62 4.61 4.63 4.61 4.60 4.63
125 TC 28.6 30.5 32.8 29.6 31.1 33.2 30.5 31.5 33.4
SHC 28.2 24.7 18.8 29.6 26.5 19.7 30.5 27.9 20.4
kW 5.07 5.07 5.08 5.08 5.06 5.09 5.07 5.06 5.09
50JZ042
Return
Air (F db) CFM (Standard Air) Air Temperature Entering Outdoor Coil (F db at 70% rh)
-100 101720
60
1225 TC 11.6 9.9 15.6 13.3 19.6 18.0 22.7 20.7 24.3 21.9
kW 2.36 2.51 2.67 2.78 2.82
1400 TC 11.9 10.1 15.9 13.5 19.9 18.3 23.2 21.1 24.7 22.3
kW 2.39 2.53 2.67 2.78 2.82
1575 TC 12.1 10.3 16.2 13.8 20.2 18.6 23.5 21.4 25.1 22.6
kW 2.42 2.55 2.69 2.79 2.83
70
1225 TC 10.9 9.3 14.9 12.7 18.9 17.4 22.0 20.1 23.6 21.3
kW 2.59 2.77 2.94 3.06 3.11
1400 TC 11.2 9.6 15.3 13.0 19.3 17.7 22.4 20.4 24.0 21.6
kW 2.62 2.78 2.94 3.05 3.10
1575 TC 11.5 9.8 15.5 13.2 19.6 18.0 22.7 20.7 24.3 21.9
kW 2.65 2.80 2.95 3.06 3.10
80
1225 TC 10.1 8.6 14.2 12.0 18.2 16.7 21.3 19.5 22.9 20.6
kW 2.86 3.05 3.23 3.37 3.43
1400 TC 10.4 8.9 14.5 12.3 18.6 17.1 21.7 10.8 23.3 21.0
kW 2.88 3.06 3.23 3.36 3.42
1575 TC 10.7 9.1 14.8 12.6 18.9 17.4 22.1 20.1 23.7 21.3
kW 2.92 3.08 3.24 3.36 3.41
50JZ042
Return
Air (F db) CFM (Standard Air) Air Temperature Entering Outdoor Coil (F db at 70% rh)
30 40 47 50 60
60
1225 TC 29.5 25.9 35.4 35.4 40.3 40.3 41.9 41.9 48.0 48.0
kW 2.97 3.16 3.32 3.38 3.60
1400 TC 30.0 26.3 35.9 35.9 40.7 40.7 42.4 42.4 48.6 48.6
kW 2.95 3.14 3.29 3.34 3.53
1575 TC 30.3 26.6 36.3 36.3 40.8 40.8 42.3 42.3 48.3 48.3
kW 2.95 3.12 3.26 3.31 3.48
70
1225 TC 28.9 25.3 34.5 34.5 39.6 39.6 41.3 41.3 48.1 48.1
kW 3.29 3.49 3.69 3.74 4.01
1400 TC 29.3 25.7 35.0 35.0 40.1 40.1 42.0 42.0 48.5 48.5
kW 3.26 3.45 3.62 3.70 3.92
1575 TC 29.7 26.0 35.4 35.4 40.5 40.5 42.0 42.0 48.1 48.1
kW 3.26 3.44 3.60 3.65 3.85
80
1225 TC 27.9 24.5 33.8 33.8 38.6 38.6 40.3 40.3 47.5 47.5
kW 3.63 3.87 4.06 4.13 4.45
1400 TC 28.5 24.9 34.2 34.2 39.2 39.2 40.9 40.9 47.7 47.7
kW 3.61 3.82 4.00 4.06 4.33
1575 TC 29.0 25.4 34.6 34.6 39.6 39.6 41.3 41.3 47.7 47.7
kW 3.59 3.79 3.96 4.02 4.26

15
Performance data (cont)
COOLING EXTENDED PERFORMANCE TABLE
HEATING EXTENDED PERFORMANCE TABLE -10–20
HEATING EXTENDED PERFORMANCE TABLE 30–60
*At 75°F entering dry bulb—Tennessee Valley Authority [TVA] rating conditions; all others at 80°F entering dry bulb.
See Legend and Notes on page 17.
50JZ048 COOLING PERFORMANCE TABLE
Temp (F)
Outdoor Air
Entering
Condenser
Evaporator Air—CFM/BF
1400/0.07 1600/0.08 1800/0.09
Evaporator Air — Ewb (F)
62 63* 67 72 62 63* 67 72 62 63* 67 72
75 TC 48.0 48.3 52.1 55.9 49.0 49.1 53.0 56.3 49.8 49.1 53.0 56.1 SHC 44.5 35.8 37.5 29.3 47.5 37.8 39.3 30.4 49.1 39.4 40.8 31.0
kW 3.50 3.70 3.58 3.62 3.64 3.89 3.76 3.79 3.81 4.13 4.00 4.02
85 TC 45.7 46.4 50.0 54.1 46.8 46.5 50.8 54.5 47.7 46.5 50.7 54.4 SHC 43.3 35.0 36.3 28.8 46.3 36.6 38.5 29.9 47.4 38.2 40.2 30.7
kW 3.86 4.07 3.97 4.00 3.99 4.30 4.15 4.17 4.17 4.53 4.39 4.41
95 TC 43.5 40.9 47.4 51.8 44.8 41.9 48.1 52.3 45.6 42.9 48.1 52.3 SHC 41.9 30.4 35.1 28.0 44.8 33.0 37.3 29.1 45.6 35.7 39.0 30.0
kW 4.25 4.26 4.40 4.43 4.41 4.57 4.57 4.60 4.59 4.88 4.80 4.84
105 TC 39.4 38.0 43.0 47.0 40.5 38.4 43.8 47.4 41.3 38.8 43.8 47.4
SHC 38.3 29.5 32.8 25.9 40.5 31.1 35.1 27.0 41.3 33.5 36.6 27.9
kW 4.72 5.02 4.93 4.97 4.89 5.17 5.10 5.15 5.11 5.45 5.33 5.39
115 TC 36.5 34.1 39.4 43.6 37.8 33.0 40.0 43.9 38.5 34.6 40.0 43.9
SHC 36.5 27.2 31.0 24.5 37.8 27.3 33.1 25.6 28.5 30.7 34.7 26.5
kW 5.25 5.48 5.42 5.47 5.39 5.57 5.60 5.64 5.62 5.87 5.83 5.85
125 TC 33.5 25.4 35.9 39.8 34.9 27.8 36.3 40.0 35.5 30.2 36.3 40.0
SHC 33.5 19.8 29.4 23.0 34.9 23.5 31.4 24.2 35.5 27.8 32.9 25.0
kW 5.80 5.69 6.00 6.04 5.98 6.03 6.18 6.22 6.20 6.37 6.38 6.47
50JZ048
Return
Air (F db) CFM (Standard Air) Air Temperature Entering Outdoor Coil (F db at 70% rh)
-100 101720
60
1400 TC 15.0 12.7 19.6 16.6 24.2 22.2 27.7 25.2 29.3 26.4
kW 2.93 3.08 3.23 3.31 3.36
1600 TC 15.5 13.1 20.2 17.2 25.0 23.0 28.5 26.0 30.2 27.2
kW 2.89 3.02 3.15 3.21 3.26
1800 TC 15.9 13.5 20.8 17.7 25.8 23.7 29.4 26.8 31.1 28.1
kW 2.83 2.96 3.09 3.14 3.18
70
1400 TC 12.5 10.6 17.6 15.0 22.8 20.9 26.2 23.8 27.7 25.0
kW 3.20 3.35 3.49 3.61 3.66
1600 TC 13.7 11.6 18.5 15.8 23.4 21.5 27.1 24.7 28.8 25.9
kW 3.13 3.29 3.44 3.51 3.56
1800 TC 14.0 11.9 19.1 16.3 24.2 22.2 27.9 25.5 29.7 26.8
kW 3.11 3.23 3.34 3.43 3.47
80
1400 TC 11.1 9.4 16.1 13.7 21.2 19.5 24.5 22.4 26.1 23.6
kW 3.40 3.59 3.78 3.92 3.98
1600 TC 11.6 9.9 16.6 14.1 21.6 19.8 25.4 23.2 27.1 24.4
kW 3.40 3.57 3.75 3.83 3.88
1800 TC 11.4 9.7 17.2 14.6 23.1 21.2 26.3 23.9 27.9 25.2
kW 3.47 3.51 3.56 3.74 3.79
50JZ048
Return
Air (F db) CFM (Standard Air) Air Temperature Entering Outdoor Coil (F db at 70% rh)
30 40 47 50 60
60
1400 TC 34.6 30.3 39.7 39.7 43.5 43.5 44.6 44.6 48.0 48.0
kW 3.53 3.68 3.77 3.81 3.94
1600 TC 35.7 31.3 41.0 41.0 44.7 44.7 45.6 45.6 49.0 49.0
kW 3.41 3.54 3.62 3.65 3.76
1800 TC 36.8 32.3 42.2 42.2 45.8 45.8 46.5 46.5 50.5 50.5
kW 3.31 3.43 3.50 3.53 3.64
70
1400 TC 33.0 28.9 38.7 38.7 42.9 42.9 44.3 44.3 48.3 48.3
kW 3.83 4.04 4.14 4.20 4.37
1600 TC 34.4 30.1 40.0 40.0 44.4 44.4 45.8 45.8 49.6 49.6
kW 3.73 3.88 3.98 4.04 4.18
1800 TC 35.4 31.0 41.3 41.3 45.7 45.7 47.0 47.0 50.7 50.7
kW 3.62 3.74 3.86 3.90 4.02
80
1400 TC 31.4 27.5 37.2 37.2 41.7 41.7 43.2 43.2 48.1 48.1
kW 4.18 4.40 4.54 4.61 4.81
1600 TC 32.5 28.5 38.6 38.6 43.2 43.2 44.6 44.6 49.5 49.5
kW 4.05 4.22 4.38 4.43 4.61
1800 TC 33.6 29.4 39.9 39.9 44.6 44.6 46.0 46.0 50.6 50.6
kW 3.94 4.08 4.23 4.28 4.43

16
Performance data (cont)
COOLING EXTENDED PERFORMANCE TABLE
HEATING EXTENDED PERFORMANCE TABLE -10–20
HEATING EXTENDED PERFORMANCE TABLE 30–60
*At 75°F entering dry bulb—Tennessee Valley Authority [TVA] rating conditions; all others at 80°F entering dry bulb.
See Legend and Notes on page 17.
50JZ060 COOLING PERFORMANCE TABLE
Temp (F)
Outdoor Air
Entering
Condenser
Evaporator Air—CFM/BF
1750/0.07 2000/0.08 2250/0.09
Evaporator Air — Ewb (F)
62 63* 67 72 62 63* 67 72 62 63* 67 72
75 TC 59.2 59.6 64.7 68.6 60.7 60.5 65.1 68.9 61.8 60.5 68.6 68.8 SHC 54.7 43.8 46.1 36.2 58.6 46.2 48.2 37.3 60.8 48.3 50.1 38.1
kW 4.55 4.75 4.62 4.67 4.72 4.98 4.85 4.89 4.94 5.25 5.14 5.17
85 TC 56.4 56.3 61.8 66.2 57.7 56.9 62.3 66.3 59.0 57.2 62.3 69.8 SHC 53.6 42.4 44.8 35.4 57.3 44.6 47.3 36.6 58.9 46.7 49.4 37.4
kW 4.97 5.21 5.08 5.12 5.11 5.45 5.31 5.33 5.35 5.70 5.59 5.61
95 TC 53.3 52.8 58.3 63.2 54.7 52.9 58.9 63.5 56.0 53.4 58.9 66.8 SHC 52.3 40.7 43.2 34.3 54.7 42.7 46.0 35.6 56.0 45.0 48.2 36.6
kW 5.41 5.72 5.57 5.60 5.49 5.98 5.79 5.83 5.78 6.21 6.04 6.10
105 TC 50.3 49.4 54.5 59.7 51.7 49.9 55.1 59.9 52.9 50.0 55.2 60.5
SHC 50.3 39.1 41.6 33.0 51.7 41.6 44.3 34.3 52.9 43.6 46.5 35.4
kW 5.90 6.24 6.10 6.13 6.24 6.46 6.31 6.35 6.42 6.72 6.56 6.62
115 TC 47.5 45.6 50.6 55.6 48.7 46.2 51.1 55.7 49.7 46.2 51.3 55.7
SHC 47.5 37.4 40.0 31.6 48.7 39.9 42.6 32.8 49.7 42.0 45.2 33.9
kW 6.47 6.80 6.65 6.69 7.00 7.02 6.84 6.90 7.08 7.27 7.07 7.17
125 TC 43.4 41.5 46.4 51.0 45.4 41.9 46.8 51.0 46.2 42.2 26.8 50.5
SHC 41.5 35.7 38.3 29.9 45.4 38.0 40.8 31.1 46.2 40.1 43.1 32.1
kW 7.18 7.34 7.22 7.27 7.25 7.63 7.43 7.48 7.51 7.83 7.65 7.75
50JZ060
Return
Air (F db) CFM (Standard Air) Air Temperature Entering Outdoor Coil (F db at 70% rh)
-100 101720
60
1750 TC 12.7 11.7 20.2 18.7 27.6 26.0 32.9 30.0 35.1 31.7
kW 3.61 3.81 4.01 4.15 4.21
2000 TC 12.2 11.3 20.0 18.5 27.7 26.1 33.2 30.2 35.5 32.0
kW 3.70 3.83 3.96 4.05 4.09
2250 TC 12.3 11.4 20.1 18.6 27.9 26.3 33.4 30.5 35.8 32.3
kW 3.70 3.81 3.91 3.98 4.01
70
1750 TC 11.4 10.5 18.8 17.4 26.2 24.6 31.3 28.6 33.5 30.2
kW 4.06 4.23 4.40 4.52 4.57
2000 TC 11.5 10.6 19.0 17.6 26.5 24.9 31.7 28.9 33.9 30.6
kW 4.04 4.18 4.32 4.43 4.47
2250 TC 11.6 10.7 19.1 17.7 26.7 25.2 32.0 29.2 34.3 30.9
kW 4.07 4.18 4.28 4.35 4.38
80
1750 TC 9.3 8.6 16.8 15.5 24.3 22.9 29.6 27.0 31.8 28.7
kW 4.37 4.56 4.75 4.89 4.95
2000 TC 9.5 8.8 17.1 15.8 24.7 23.2 30.0 27.3 32.2 29.1
kW 4.37 4.53 4.69 4.80 4.85
2250 TC 9.8 9.0 17.4 16.1 25.0 23.6 30.3 27.7 32.6 29.4
kW 4.34 4.48 4.62 4.72 4.76
50JZ060
Return
Air (F db) CFM (Standard Air) Air Temperature Entering Outdoor Coil (F db at 70% rh)
30 40 47 50 60
60
1750 TC 42.6 37.3 50.5 50.5 55.9 55.9 58.5 58.5 64.4 64.4
kW 4.40 4.55 4.68 4.68 4.81
2000 TC 43.3 37.9 51.0 51.0 57.4 57.4 58.9 58.9 64.1 64.1
kW 4.22 4.40 4.48 4.51 4.59
2250 TC 43.6 38.2 51.4 51.4 57.2 57.2 59.2 59.2 65.4 65.4
kW 4.12 4.28 4.34 4.38 4.48
70
1750 TC 40.9 35.8 49.2 49.2 55.4 55.4 57.9 57.9 65.5 65.5
kW 4.74 4.97 5.17 5.16 5.39
2000 TC 41.4 36.3 49.8 49.8 56.1 56.1 58.6 58.6 65.7 65.7
kW 4.61 4.82 4.99 4.99 5.16
2250 TC 41.9 36.7 50.3 50.3 56.6 56.6 59.1 59.1 65.6 65.6
kW 4.49 4.70 4.85 4.85 4.98
80
1750 TC 39.3 34.5 47.2 47.2 54.0 54.0 56.5 56.5 65.2 65.2
kW 5.14 5.39 5.67 5.69 5.99
2000 TC 39.8 34.9 47.8 47.8 55.0 55.0 57.2 57.2 65.3 65.3
kW 5.01 5.24 5.41 5.49 5.71
2250 TC 40.2 35.3 48.3 48.3 55.4 55.4 57.7 57.7 66.6 66.6
kW 4.91 5.11 5.28 5.34 5.58

17
LEGEND
Ewb – Entering Wet-Bulb
kW – Total Unit Power Input
SHC – Sensible Heat Capacity (1000 Btuh)
TC – Total Capacity (1000 Btuh) (net)
NOTES:
1. Ratings are net; they account for the effects of the evaporator-fan motor power and heat.
2. Direct interpolation is permissible. Do not extrapolate.
3. The following formulas may be used:
sensible capacity (Btuh)
t=t2
ldb edb 1.10 x cfm
t = Wet-bulb temperature corresponding to enthalpy of air leaving
lwb evaporator coil (h )
lwb
total capacity (Btuh)
h=h2
lwb ewb 4.5 x cfm
Where: h = Enthalpy of air entering evaporator coil
ewb
Performance data (cont)
ECONOMIZER 1-in. FILTER PRESSURE DROP (in. wg)
MULTIPLICATION FACTORS
Example: 15.0 kw (at 240v) heater on 208v
= 15.0 (.75 mult factor)
= 11.25 capacity at 208v
UNIT50JZ PRESSURE DROP
024-036 0.20
042-060 0.25
HEATER kw
RATING VOLTAGE DISTRIBUTIONV/3/60 MULTIPLICATION FACTOR
240 200
208
230
240
.69
.75
.92
1.00
480 440 460
480
.84
.92
1.00
LEGEND
BF — Bypass Factor
Ewb — Entering Wet-Bulb
kW — Total Unit Power Input
SHC — Sensible Heat Capacity (1000 Btuh)
TC — Total Capacity (1000 Btuh) (net)
Edb — Entering Dry-Bulb
rh — Relative Humidity
— Indicates Integrated Ratings
4. The SHC is based on 80°F edb temperature of air entering evaporator
coil. Below 80°F edb, subtract (corr factor x cfm) from SHC.
Above 80°F edb, add (corr factor x cfm) to SHC.
Correction Factor = 1.10 x (1 + BF) x (edb + 80).
5. Integrated capacity is maximum (instantaneous) capacity less the effect
of frost on the outdoor coil and the heat required to defrost it.
NOTES:
1. Ratings are net; they account for the effects
of the evaporator-fan motor power and heat.
2. Direct interpolation is permissible. Do not extrapolate.
3. The following formulas may be used:
ELECTRIC HEAT PRESSURE DROP TABLES
Small Cabinet: 024-036
Large Cabinet: 042-060
STATIC CFM
500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600
5 Kw 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.04 0.06 0.07
10 Kw 0.00 0.00 0.00 0.00 0.00 0.02 0.04 0.06 0.07 0.09 0.10 0.11
15 Kw 0.00 0.00 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.18
20 Kw 0.00 0.00 0.02 0.04 0.06 0.08 0.09 0.11 0.13 0.15 0.17 0.19
STATIC CFM
1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500
5 Kw 0.00 0.00 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12
10 Kw 0.00 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.13
15 Kw 0.00 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.13 0.14 0.15
20 Kw 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.13 0.14 0.15 0.16

18
WET COIL DELIVERY—HORIZONTAL AND DOWNFLOW DISCHARGE UNIT 50JZ 024-060
*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.
3. Deduct 10% for 208v.
FILTER PRESSURE DROP (In. wg)
230 AND 460 VOLT
Unit
50JZ Motor Speed External Static Pressure (in.wg)
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
024
Low Watts 275273271270———————
Cfm 923 844 754 669 — ——————
Med Watts — — — 359 353 350 347 341 — — —
Cfm — — — 941 876 814 737 622 — — —
High Watts ——————447439431423—
Cfm ——————968869765659—
030
Low Watts 276276272————————
Cfm 963929781————————
Med Watts 375377371362354350—————
Cfm 1202 1170 1079 976 884 807 —————
High Watts ————469449435428———
Cfm ————1174988828718———
036
Low Watts 462451431411394381—————
Cfm 1374 1290 1205 1116 1020 916 —————
Med Watts 523506490471449426—————
Cfm 1500 1408 1301 1190 1082 977 —————
High Watts — 645 628 610 595 584 575 — — — —
Cfm — 1474 1369 1267 1169 1069 962 — — — —
042
Low Watts 660 639 624 611 598 583 564 541 518 495 473
Cfm 1701 1659 1618 1576 1531 1481 1425 1363 1293 1223 1154
Med Watts —————704675645614582550
Cfm —————1701 1631 1550 1460 1361 1256
High Watts ———————806777749726
Cfm ———————1708 1614 1521 1435
048
Low Watts 620 600 586 574 562 548 530 510 487 — —
Cfm 1662 1621 1581 1540 1496 1447 1392 1331 1263 — —
Med Watts 763 747 729 709 686 661 634 606 577 547 517
Cfm 1917 1868 1822 1774 1722 1662 1594 1515 1427 1330 1227
High Watts — — — 852 832 809 784 757 730 704 682
Cfm — — — 1982 1914 1839 1757 1669 1577 1486 1402
060
Low Watts 597 592 578 526 460 452 445 — — — —
Cfm 2265 2190 2101 2033 1974 1869 1614 — — — —
Med Watts 754 730 707 687 671 658 646 630 603 558 486
Cfm 2383 2282 2202 2134 2070 2005 1935 1858 1771 1667 1576
High Watts 901 876 856 836 813 785 755 723 696 681 687
Cfm 2480 2383 2301 2233 2175 2122 2066 1998 1910 1788 1619
UNIT SIZE
50JZ FILTER SIZE CFM
500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300
024, 030 20 X 20 X 1 0.05 0.07 0.08 0.10 0.12 0.13 0.14 0.15 ———————————
36 20X24X1————0.09 0.10 0.11 0.13 0.14 0.15 0.16 ————————
042, 048, 060 24X30X1———————0.07 0.08 0.09 0.10 0.11 0.12 0.13 0.14 0.15 0.16 0.17 0.18

19
INDOOR
THERMOSTAT
DISCONNECT
PER NEC*
FROM
POWER
SOURCE
RETURN
AIR
TOP COVER
*NEC - NATIONAL ELECTRICAL CODE
Typical piping and wiring
ROOF
RETURN-AIR
FLEXIBLE DUCT
CEILING
CONCENTRIC DIFFUSER BOX
(FIELD-SUPPLIED)
SUPPLY-AIR
FLEXIBLE DUCT
ROOF-MOUNTING
CURB
C00023
C00063

20
Condensate trap — A 2-in. condensate trap must be field
supplied.
Ductwork — Secure downflow discharge ductwork to roof
curb. For horizontal discharge applications, attach ductwork
to unit with flanges.
To convert a unit to downflow discharge — Units are
equipped with factory-installed inserts in the downflow
openings. Remove the inserts similar to removing an
electrical knock-out. Leave on duct covers to seal the
horizontal discharge openings in the unit. Units installed in
horizontal discharge orientation do not require duct covers.
Maximum cooling airflow — To minimize the possibility
of condensate blow-off from the evaporator, airflow
through the units should not exceed 450 cfm/ton.
Minimum cooling airflow — The minimum cooling
airflow is 350 cfm/ton.
Minimum cooling ambient operating temperature —All
standard units have a minimum ambient operating
temperature of 40°F.With accessory low ambient temperature
kit, units can operate at temperatures down to 0°F.
Maximum operating outdoor air temperature —Maximum
outdoor operating air temperature for cooling is 125°F.
Application data
1” MIN.
2” MIN.
TRAP
OUTLET