Model 594D Energy-Efficient Air Conditioners incorporate innovative technology to provide quiet, reliab le summer cooling performance. Built into these units are the features most desired by
homeowners today, including SEER ratings of up to 12.0 when
used with components as designated by manufacturer . All models are listed with UL, c-UL, ARI, CEC, and CSA-EEV.
AVAILABLE OPTIONS
ELECTRICAL RANGE —All units are offered in 208/230-volts,
single phase.
HEAVY DUTY INLET GRILLE —The DuraGuard™ coil pro-
tector, made of a coated steel wire grid with vertical 3/8 in.
spacing, is designed to help protect the coil from inclement
weather, vandalism, and incidental damage. It provides protection while not restricting airflow and maintaining ease of
coil inspection and cleaning.
Model 594D (60 Hz)
Sizes 018 thru 060
WIDE RANGE OF SIZES —Availab le in 7 nominal sizes from 018
through 060 to meet the needs for residential and light commercial
applications.
WEA THER-PR OTECTIVE CABINET —Steel is galvanized, then
coated with a layer of zinc phosphate to which a coat of modified
polyester powder coating is applied and baked on. This provides
each unit with a hard, smooth finish that will last for many years.
All screws on cabinet exterior are ceramic coated for a long-lasting, rust-resistant, quality appearance.
TOTALLY ENCLOSED FAN MOTOR —Means greater reliability
under rain conditions and dependable performance for many
years. The permanent-split capacitor type motor was designed for
optimum efficiency. Then, under extreme conditions, the motor
was tested and qualified to help ensure the greatest reliability.
UNIT DESIGN —Copper tube, enhanced aluminum fin coil is
designed for optimum heat transf er . Vertical air discharge carries
sound and hot condenser air up and away from adjacent patio
areas and foliage. Heat pump style base pan f or easy remo val of
water, dirt, and leaves.
APPLICATION VERSATILITY —The 594D can be combined
with a wide variety of evaporator coils and blower packages to
provide quiet, dependable comfort. Unit can be installed on a
roof or at ground level on a slab.
EXTERNAL SERVICE VALVES —Both service valves are brass,
back seating type with sweat connections. Valves are externally
located so refrigerant tube connections can be made quickly and
easily. Each valve has a service port for ease of checking operating refrigerant pressures.
EASY SERVICEABILITY —One panel provides access to elec-
trical controls and compressor. Removal of wire dome grille
gives access to fan motor, while removal of top gives access to
coil.
COMPRESSOR PROTECTION —Each model is protected with
internal temperature- and current-sensitive overloads. An internal pressure relief valve provides high-pressure protection to the
refrigerant system.
AEROQUIET FAN SYSTEM —Allows air to move through the
unit more easily which lowers sound lev els and impro ves overall
efficiency.
SCROLL COMPRESSOR —All units feature the scroll compres-
sor. This compressor is significantly more efficient than conventional compressors. Due to the simplicity of its design, it offers
improved reliability. Each compressor is mounted on rubber isolators for additional sound reduction. Continuous operation is
approved down to 55°F (12.8°C) in the cooling mode. (See cooling performance tables.)
LIMITED WARRANTY —Standard 1-year warranty on all parts,
with an additional 9-year warranty on the compressor.
Form No. PDS 594D.18.7
B
DIA
/8-IN.
7
DIA KNOCKOUT (ALL SIZES)
/8-IN.
1
DIA KNOCKOUT
/8-IN.
3
PANEL
ACCESS
A97001
PAD DIMENSIONSABCDEFGHKLMN
MINIMUM MOUNTING
"
/4
1
1
M
A
G
F
"
/2
1
10
FIELD POWER SUPPLY CONN
(042 THRU 060 SIZES ONLY)
AND 1
HOLE WITH 1
DIA LIQUID
DIA VAPOR
LINE CONN
H
/8-IN.
3
LINE CONN
"
/16
3
4
"
/4
3
1
N
DIA HOLE
/8-IN.
7
FIELD CONTROL
SUPPLY CONN
"
"
/16
/2
9
1
1
2
C
AIR DISCHARGE
DIA TIEDOWN KNOCKOUTS
/8-IN.
3
(2) PLACES IN BASEPAN
clearance to service end of unit, 48 in. above unit, 6 in. on one side, 12 in. on remaining side,
K
D
E
L
C
"
/16
3
8
UNIT DIMENSIONS
DIMENSIONS (IN.)
and 24 in. between units for proper airflow.
Minimum outdoor operating ambient in cooling mode is 55°F (unless low-ambient control is used) max 125°F.2.
Series designation is the 14th position of the unit model number.3.
1. Allow 30 in.
Center of gravity .4.
AIR IN
L
NOTES:
AIR DISCHARGE
AIR IN
—2—
AIR IN
AIR DISCHARGE
SIZESERIES
UNIT
018E23-13/1622-1/226-3/164-1/87-1/813-13/1618-3/85/81214-5/8102-3/820 x 27
024E27-13/1622-1/226-3/164-1/87-1/815-15/1622-3/85/81214-5/8112-3/820 x 27
030E27-13/1622-1/226-3/164-1/87-1/815-15/1622-3/83/41214-5/8112-3/820 X 27
036E27-13/1630335-1/169-11/1615-15/1622-3/83/416-1/420-3/8112-15/1626 X 32
042E33-13/1630335-1/169-11/1621-15/1628-3/87/816-1/420-3/813-1/22-15/1626 X 32
048E, F33-13/1630335-1/169-11/1621-15/1628-3/87/816-3/420-3/813-1/22-15/1626 x 32
060E39-13/1630335-1/169-11/1627-15/1634-3/87/816-3/420-3/8152-15/1626 x 32
Unit Volts—Hertz—Phase208/230—60—1208/230—60—1208/230—60—1208/230—60—1
Operating V oltage Range*187—253187—253187—253187—253
Compressor— Rated Load Amps8.911.413.716.0
Locked Rotor Amps41.056.072.588.0
Condenser Fan Motor—Full Load Amps0.50.50.81.1
Min Unit Ampacity for Wire Sizing11.614.817.921.1
Min Wire Size (60°C Copper) AWG†14141412
Min Wire Size (75°C Copper) AWG†14141412
Max Wire Length (60°C) (Ft)‡61535666
Max Wire Length (75°C) (Ft)‡58505363
Max Branch Circuit Fuse Size**20202530
COMPRESSOR AND REFRIGERANT
Compressor—Manufacturer & TypeCopeland Scroll
Temperature & Current ProtectionInternal Line Break
Refrigerant—R-22 Amount (Lb)4.004.254.505.53
CONDENSER COIL AND FAN
Coil Face Area (Sq Ft)7.278.812.0
Fins per In.—Rows—Circuits20—1—125—1—2
Fan Motor—HP, Type, & RPM1/12 PSC & 11001/10 PSC & 11001/5 PSC & 825
Volts—Hertz—Phase208/230—60—1
Condenser Airflow (CFM)170020003000
Humidity ControlTSTATBBPRH01-B
Outdoor Air Temperature SensorTSTATXXSEN01-B
Backplate for Non-Programmable
ThermostatTSTATXXNBP01
Backplate for Builder’s ThermostatTSTATXXBBP01
Backplate for Programmable ThermostatTSTATXXPBP01
Thermostat Conversion Kit (4 to 5 wire)
— 10 PackTSTATXXCNV10
See notes on page 5.
—4—
SPECIFICATIONS Continued
UNIT SIZE - SERIES
OPERA TING WT (Lb)213247287
042-E048-E/F060-E
ELECTRICAL
Unit Volts—Hertz—Phase208/230—60—1208/230—60—1208/230—60—1
Operating V oltage Range*187—253187—253187—253
Compressor— Rated Load Amps20.023.7/21.328.8
Locked Rotor Amps104.0129.0/137.0169.0
Condenser Fan Motor—Full Load Amps1.11.41.4
Min Unit Ampacity for Wire Sizing26.131.0/28.037.4
Min Wire Size (60°C Copper) AWG†108/108
Min Wire Size (75°C Copper) AWG†10108
Max Wire Length (60°C) (Ft)‡9671104
Max Wire Length (75°C) (Ft)‡916899
Max Branch Circuit Fuse Size**4050/4060
COMPRESSOR AND REFRIGERANT
Compressor—Manufacturer & TypeCopeland Scroll
Temperature & Current ProtectionInternal Line Break
Refrigerant—R-22 Amount (Lb)6.686.349.25
CONDENSER COIL AND FAN
Coil Face Area (Sq Ft)15.218.3
Fins per In.—Rows—Circuits25—1—325—1—4
Fan Motor—HP, Type, & RPM1/5 PSC & 8251/4 PSC & 1100
Volts—Hertz—Phase208/230—60—1
Condenser Airflow (CFM)30003300
Humidity ControlTSTATBBPRH01-B
Outdoor Air Temperature SensorTSTATXXSEN01-B
Backplate for Non-Programmable
ThermostatTSTATXXNBP01
Backplate for Builder’s ThermostatTSTATXXBBP01
Backplate for Programmable ThermostatTSTATXXPBP01
Thermostat Conversion Kit (4 to 5 wire)
— 10 PackTSTATXXCNV10
* Permissible limits of the voltage range at which the unit will operate satisfactorily. Operation outside these limits may result in unit failure.
Copper wire must be used from service disconnect to unit.
† If wire is applied at ambient greater than 30°C (86°F), consult Table 310-16 of the NEC (ANSI/NFPA 70).
The ampacity of nonmetallic-sheathed cable (NM), trade name ROMEX, shall be that of 60°C (140°F) conductors, per the NEC (ANSI/NFPA 70)
Article 336-26.
‡ Length shown is as measured 1 way along wire path between unit and service panel for a voltage drop not to exceed 2 percent.
All motors/compressors contain internal overload protection.
** Time-delay fuse.
†† Use with Low-Ambient Controller.
‡‡ Fan motor with ball bearings required.
—5—
ACCESSORY USAGE GUIDELINE
REQUIRED FOR
LOW-AMBIENT
ACCESSORY
Crankcase HeaterYesYesNo
Evaporator Freeze ThermostatYesNoNo
Winter Start Control
AccumulatorNoNoNo
Compressor Start Assist
Capacitor and Relay
Low-Ambient Controller
MotorMaster® Control
Liquid-Line Solenoid Valve
Ball Bearing Fan MotorYesNoNo
or
Wind BaffleSee Low-Ambient InstructionsNoNo
Coastal FilterNoNoYes
Support FeetRecommendedNoRecommended
or
Hard Shutoff TXV
APPLICATIONS
(Below 55°F)
†
Yes
YesYesNo
YesN oNo
No
* For tubing line sets between 50 and 175 ft, refer to Residential Split System Long-Line Application Guideline.
† Only when low-pressure switch is used.
REQUIRED FOR
LONG-LINE
APPLICATIONS*
(Over 50 Ft)
NoNo
See Long-Line
Application
Guideline
REQUIRED FOR
SEA COAST
APPLICATIONS
(Within 2 Miles)
No
ACCESSORY DESCRIPTION AND USAGE (Listed Alphabetically)
1. Ball Bearing Fan Motor
A fan motor with ball bearings which permits speed reduction while maintaining bearing lubrication.
SUGGESTED USE: Required on all units where Low-Ambient Controller (full modulation feature) or MotorMaster® Control has been added.
2. Coastal Filter
A mesh screen inserted under the top cover and inside the base pan to protect the condenser coil from corrosive atmosphere without restricting airflow.
SUGGESTED USE: In geographic areas where salt damage could occur.
3. Compressor Start Assist—Capacitor/Relay Type
Start capacitor and start relay gives “hard” boost to compressor motor at each start-up.
SUGGESTED USE: Installations where interconnecting tube length exceeds 50 ft.
4. Compressor Start Assist—PTC Type
Solid state electrical device which gives a ‘‘soft’’ boost to compressor motor at each start-up.
SUGGESTED USE: Installations with marginal power supply.
5. Crankcase Heater
An electric resistance heater which mounts to the base of the compressor to keep the lubricant warm during off cycles. Improves compressor lubrication
on restart and minimizes chance of refrigerant slugging. May or may not include a thermostat control.
SUGGESTED USE: When interconnecting tube length exceeds 50 ft.
6. Cycle Protector
Solid state timing device which prevents compressor rapid recycling. Control provides an approximate 5-minute delay after power to the compressor has
been interrupted for any reason, including normal room thermostat cycling.
SUGGESTED USE: Installations in areas where power interruptions are frequent.
7. Evaporator Freeze Thermostat
An SPST temperature actuated switch which stops unit operation when evaporator reaches freeze-up conditions.
SUGGESTED USE: All units where Winter Start Control has been added. Use with Low-Ambient Controller.
8. Filter Drier
A device for removing contaminants from refrigerant circulating in an air conditioner: 1 direction flow.
SUGGESTED USE: All split-system air conditioners.
9. High-Pressure Switch
Auto reset SPST switch activ ated by refrigerant pressure on high side of refrigerant circuit. Cycles compressor off if refrigerant pressure rises to 400 ± 10
psig and resets at 298 ± 20 psig. Provides protection against compressor damage due to loss of outdoor airflow. To prevent rapid compressor recycling,
Cycle Protector can be used with this switch.
SUGGESTED USE: Installations exposed to very ‘‘dirty’’ outdoor air.
10. Liquid-Line Solenoid Valve (LSV)
An electrically operated shutoff valve to be installed at the outdoor or indoor unit (depending on tubing configuration) which stops and starts refrigerant
liquid flow in response to compressor operation. Maintains a column of refrigerant liquid ready for action at next compressor operation cycle.
Note: Compressor Start Assist—Capacitor/Relay Type must also be used. Do not use with hard shutoff TXV.
SUGGESTED USE: For improved system performance in air conditioners for certain combinations of indoor and outdoor units. Refer to ARI Unitary Directory.
In areas with high pollution levels.
Installations where outdoor design temperature exceeds 105°F (40.6°C).
Replacement installations with hard shutoff expansion valve on indoor coil.
Installations where Liquid-Line Solenoid Valve has been added.
Replacement installations with rapid pressure balance (RPB) expansion valve on indoor coil.
When unit will be operated below 55°F (12.8°C) outdoor air temperature. Use with Low-Ambient Controller.
All commercial installations.
Where user is likely to “play” with the room thermostat.
All commercial installations.
Installations where interconnecting tube length exceeds 50 ft.
High-rise applications.
Installations where condenser inlet air temperature exceeds 125°F (51.7°C).
In certain long-line applications. Refer to Residential Split System Long-Line Application Guideline.
—6—
ACCESSORY DESCRIPTION AND USAGE (Listed Alphabetically) Continued
11. Low-Ambient Controller
Head pressure controller is a cycle control device activated b y a temper ature sensor mounted on a header tube of the outdoor coil. It is designed to cycle
the outdoor fan motor in order to maintain condensing temperature within normal operating limits (appro ximately 100°F high and 60°F low). The control will
maintain working head pressure at low-ambient temperatures down to 0°F when properly installed.
SUGGESTED USE: Cooling operation at outdoor temperatures below 55°F (12.8°C).
12. Low-Pressure Switch
Auto reset SPST switch activ ated by refrigerant pressure on low side of refrigerant circuit. Cycles compressor off if refrigerant pressure drops to about 27
psig. Prevents indoor coil freeze-up due to loss of indoor airflow. Provides protection against compressor damage due to loss of refrigerant charge. To
prevent rapid compressor recycling, Cycle Protector can be used with this switch.
SUGGESTED USE: Where indoor coil is exposed to ‘‘dirty’’ air.
13. MotorMaster® Control
A fan speed control device activated by a temperature sensor. Designed to control condenser fan motor speed in response to the saturated, condensing
temperature during operation in cooling mode only. For outdoor temperatures down to –20°F, it maintains condensing temperature at 100°F ± 10°F.
SUGGESTED USE: Cooling operation at outdoor temperatures below 55°F.
14. Outdoor Air Temperature Sensor
A device that allows the temperature at a remote location (outdoors) to be displayed at the thermostat.
SUGGESTED USE: All corporate programmable thermostats.
15. Support Feet
Four stick-on plastic feet which raise the unit 4 in. above the mounting pad. This allows sand, dirt, and other debris to be flushed from the unit base,
minimizing corrosion.
SUGGESTED USE: Coastal installations.
16. Thermostatic Expansion Valve (TXV)
A modulating flow control valve which meters refrigerant liquid flow r ate into the evaporator in response to the superheat of the refrigerant gas leaving the
evaporator. Kit includes valve, adapter tubes, and external equalizer tube. Both hard shutoff and RPB type valves are available.
SUGGESTED USE: For improved system performance in cooling mode for certain combinations of indoor and outdoor units. Refer to ARI Unitary Directory.
17. Time-Delay Relay
An SPST delay relay which briefly continues operation of the indoor blower motor to provide additional cooling after the compressor cycles off.
SUGGESTED USE: For improved efficiency ratings for certain combinations of indoor and outdoor units. Refer to ARI Unitary Directory.
18. Winter Start Control
An SPST delay relay which bypasses the lo w-pressure switch f or approximately 3 min utes to permit start-up for cooling operation under low-load conditions.
SUGGESTED USE: All air conditioners where Low-Ambient Controller has been added.
All commercial installations.
All commercial installations.
Windy areas or where debris is normally circulating.
Rooftop installations.