mcquay chiller cond
TRANSCRIPT
Catalog Cat A-C Cond
© 2007 McQuay International
Air-Cooled Condensers
Model ACH 014 - 225
Model ACX 014 - 225
Model ACL 014 - 225
Capacities from 130 MBH to 2225 MBH
R-22, R-134a, R-407C, R-410A
2 Catalog A-C Condensers
Table of Contents
Introduction................................................................................................................3
Model Description......................................................................................................4
Design Features and Benefits ....................................................................................5
Discharge Pressure Control.......................................................................................7
Options........................................................................................................................9
Selection Procedure..................................................................................................10
Performance Data ....................................................................................................12
ACH .................................................................................................................................................12 ACL..................................................................................................................................................13 ACX .................................................................................................................................................14
Electrical Data..........................................................................................................15
Physical Data ............................................................................................................20
Dimensions................................................................................................................21
Application Data ......................................................................................................22
Fan Cycle Control Panels .................................................................................................................22 Discharge Pressure Fan Cycling.......................................................................................................22 Variable Speed .................................................................................................................................22 Condenser Flooding Control ............................................................................................................22 Sound Data.......................................................................................................................................23
Engineering Guide Specifications...........................................................................24
2007 McQuay International "Illustrations cover the general appearance of McQuay International products at the time of publication and we reserve the right to make changes in design and
construction at anytime without notice"
Manufactured in an ISO Certified Facility
Document Cat A-C Cond
Issue Date March 2007
Replaces Cat ACAQ-1
Catalog A-C Condensers 3
Introduction
Direct Drive Condenser Series The McQuay direct-drive, air-cooled condensers are available in three different models, each
with 24 sizes and numerous options. They are designed to be used with McQuay Model WGS
screw compressors (R-134a) or WGZ scroll compressor chillers (R-22).
Model ACH, providing low-cost, high capacity performance where sound and efficiency are
not major concerns.
Models ACL and ACX, providing moderate cost, excellent capacity and efficiency, coupled
with low sound levels.
Table 1, Model Summary
MODEL FEATURE
ACH ACL ACX
Fan Motor Speed/Dia. (in.) 1140/30 830/30 830/30
Fan Motor Power 1.5 HP 1.5 HP 1.0 HP
Fan Type Standard Quiet Quiet
Cabinet Galvanized (1) Galvanized (1) Galvanized (1)
Venturi Cover Removable Removable Removable
Hinged Option Yes Yes Yes
2-Year Unit Warranty Yes Yes Yes
3-Year Motor Warranty No No No
5-Year Tube Leak Warranty (2) Yes Yes Yes
Sound Level Highest Medium High Medium Low
Capacity Medium High Medium Low Lowest
NOTES: 1. Painted galvanized or aluminum available as an option. 2. Warrants against tube leaks at the tube sheet.
Refrigerants All models can be used with R-22, R-134a, R-407C (450 psi working pressure), and R-
410A (650 psi working pressure). These are the refrigerants used on McQuay equipment
requiring air-cooled condensers.
Model Code
A C H 020 A S
Fan Rows
S=Single
D=Dual
Air-Cooled Condenser
Model Descriptor
H, X, L Vintage
Size: Nominal
Evaporator Tons
4 Catalog A-C Condensers
Model Description
In addition to the features described in the previous section, each model has unique features
and components that determine its cost/efficiency/sound-level mix.
Model ACL and ACX
Two mid-line units offering a combination of excellent efficiency and sound ratings at a
moderate price.
Fan Motors: 830 rpm fan motors; the ACX having 1.0 HP and the ACL having 1.5 HP
Fan Blades: Both models have patented blade design providing high air flow capacity with
low sound levels. The ACL has a slightly more aggressive design, moving more air for
greater capacity, but with larger motors and a sound level higher by about 3 db.
Galvanized Steel Cabinet: Galvanized steel is standard with painted galvanized or
aluminum as options.
Model ACH
The ACH model offers the most capacity per dollar for applications where efficiency and
sound level are not critical.
Fan Motors: Fan motors are 1140 rpm, 1.5 HP
Fan Blades: Standard fan blades are furnished, providing maximum air flow but with higher
sound levels and lower efficiency.
Galvanized Steel Cabinet: Galvanized steel is standard with painted galvanized or
aluminum as options.
Fan/Circuit Configuration
Fan Rows: All models have either one or dual rows of fans with up to seven fans in a row,
for a total of 14 fans for a dual row unit. The number of fan rows is part of the Model Code
as shown on the previous page.
Refrigerant Circuits: Dual row condensers have two refrigerant circuits, one for each row of
fans and match up with McQuay WGZ and WGS chillers, which have two circuits. The
two refrigerant circuits can be optionally equipped with a factory manifold to make one
refrigerant circuit.
Single row condensers have a single refrigerant circuit and must be used in pairs on
McQuay chillers, each condenser matched to one of the chiller circuits. A pair of single
row units is usually only used in the rare case when space requirements dictate two long
narrow condensers end to end or when they are in separate locations.
The single row configuration allows more ambient air to flow through the coils than does a
unit with a dual row, side-by-side fans and so they often have a little more capacity than a
two row unit with the same number of fans. For a given capacity, two single row
condensers will cost more than a single dual row unit.
Dual fan, two circuit condensers can be manifolded together to form a single refrigeration
circuit.
Catalog A-C Condensers 5
Design Features and Benefits
Ease of Installation
The condensers are designed to reduce the cost and time
required for installation. All lifting brackets are factory
installed, and the legs are designed for quick installations.
Fan motors are factory wired to a control panel providing a
single point for field wiring. The control panel has a through
the door disconnect. A variety of fan cycling control panels
can be factory mounted and wired to the condenser,
eliminating the need for a field-mounted built-up control
panel.
Dynamic Stress Testing
Fan motor and blade assemblies have undergone dynamic
stress testing. This testing measures the stress levels and
frequency of vibration of the fan during actual operation of
the condenser. This type of testing ensures a design with low
vibration levels and long, trouble-free service life of the air
moving assembly.
Condenser Cabinet
Condenser cabinets are designed for attractive appearance and corrosion protection.
Models ACH, ACX, and ACL are galvanized with painted galvanized or with aluminum
construction as an option.
Condensers have a unique internal frame design consisting of heavy gauge galvanized steel
tube sheets and motor rails. Fan motors are bolted to motor rail for increased reliability,
reduced noise and vibration, and ease of replacement.
Full width fan baffles are provided to increase unit rigidity and prevent windmilling during
fan cycling.
Condenser Coils
The standard condensers use high efficiency coils with corrugated aluminum fins bonded to
staggered copper tubes. Condenser coils are designed to operate with the new generation of
environmentally safe refrigerants.
Sub-coolers
Sub-coolers are pre-piped, integral components. Capacity listings have sub-cooling
incorporated in the ratings, making selection easier and simplifying installation
requirements.
Multi-circuiting
Multi circuiting of the condenser to match the system requirement is available at no extra
cost. Each circuit has its own inlet and outlet connection, labeled to avoid installation
confusion. McQuay WGZ scroll and WGS screw chillers all have two refrigerant circuits.
Lifting lugs are factory mounted for easy rigging and installation.
McQuay condensers have been thoroughly tested to guarantee
high performance.
6 Catalog A-C Condensers
Floating Tube
All condensers use a Patented Floating Tube Design (U.S.
Patent No. 5,158,134) to eliminate refrigerant leaks at the tube
sheets. Additional tubes are added to the condenser coil.
These tubes are expanded into the aluminum fins and
condenser tube sheets. These anchor tubes support the weight
of the coil, but are not a part of the refrigerant circuit. The
tubes in the refrigerant circuit are expanded into the fins, but
“float” through oversized holes in the tube sheets. Tube sheet
leaks are virtually eliminated, since the tubes which carry
refrigerant never come in contact with the tube sheet.
Fan Motors
Condenser fan motors are high efficiency, three phase
motors designed for outdoor condenser applications.
Motors have thermal overload protection and permanently
lubricated ball bearings. Separate fan motors are designed
for 1140 rpm, 830 rpm or variable speed. All motors are
factory wired to a condenser control panel to provide a
single point for field wiring. Fan motors are available in
460/3/60, 208-230/3/60 or 575/3/60 on the ACH model
only.
Fan Blades
Direct drive fan blades are designed to pull air through the
condenser coil to ensure uniform air distribution over the entire
coil. Fan blades have been selected and laboratory tested for
optimum performance and minimum noise at each operating
speed. Model ACH uses standard fan blades, Models ACX and
ACL use a specially designed blade with lower sound levels.
Fan Guards
Fan guards are PVC coated steel for maximum corrosion
protection. Fan guards have extended height to increase
the distance from the fan blade to the guard, reducing the
noise level of the condenser.
Fin Spacing
Standard condenser fin spacing is 14 fins per inch (fpi). Fin spacing of 10, and 12 fins-per-
inch are optionally available.
Weather Protection
All units have a weatherproof control panel with door-mounted interrupt disconnect switch
and Sealtite® wiring as an option.
Patented design floating tubes dramatically reduce tube sheet
leaks.
Catalog A-C Condensers 7
Discharge Pressure Control
Proper application of controls is important to a successful installation. McQuay air-cooled
condensers have several control options available.
System Arrangements:
The fan control arrangement for WGZ and WGS chillers are shown in Table 2 and Table 3
on page 8. Condenser pressure control is accomplished by varying the total coil airflow by
either changing the number of operating fans and/or the speed of the “first on, last off” fan.
The number of control stages is shown in the tables. The SpeedTrol option should be used
when unit operation is expected in ambient temperatures between 0°F and 35°F. When
condenser circuits are manifolded, the corresponding controls need to be coupled together.
Control Options:
Four standard control options are available. Other special options can be offered to meet
individual requirements.
1. Standard Control (Code NN)
The standard unit is provided with a contactor for each fan motor. A customer-supplied,
and field-installed control signal from another source is required to energize each contactor
based on the condenser pressure. Field wiring between the compressorized product and
remote condenser is required. Refer to local codes for this wiring. The contactor control
voltage is 115 volts and a transformer is not provided but is an available option.
Typical control logic is to start additional fans as condensing pressure increases. Although
the parameters of the companion refrigeration system dictate the control strategy, it is good
practice to only use this option for operation above ambient air temperatures of 35°F.
Standard Control using Chiller MicroTech Control Staging
The Standard Control (Code Y) or Standard Control with SpeedTrol (Code C) can utilize
the standard pressure sensing capability of a McQuay chiller’s MicroTech controller(s) to
stage the fans. The WGZ chiller has a single microprocessor with eight fan control digital
outputs, four for each refrigerant circuit. The WGS chiller has a separate controller for
each of the two circuits with six fan stages, for a total of twelve for the unit.
Field wiring is required between the chiller MicroTech controller and the fan contactors
located in the condenser. The number of connections will depend on the condenser size and
arrangement as shown in Table 2 or Table 3.
This option uses the standard condenser control included with the condenser and the
standard MicroTech control included with the chiller. Field-supplied interconnecting
wiring is the only cost associated with this arrangement. It does not provide variable speed
for operation below 35°F. Use control option #2 to add Speedtrol for operation from 35°F.
to 0°F.
2. Standard Control with SpeedTrol (Code ST)
This option is identical to the Standard Control (Code = NN) except the “first on, last off”
fan will have a variable speed drive. As the ambient air temperature drops below 35°F, the
fan speed will slow down, reducing condenser air flow, to maintain the minimum allowable
condensing pressure for the companion unit. A control transformer is provided to power the
variable speed drive.
Important: This option does not include a method of starting or cycling the balance of fans
on the condenser. Some means to do so must be supplied, mounted and wired in the field.
The MicroTech controller on McQuay WGZ or WGS chillers can provide this staging
function or some other multi-step controller or multiple pressure switches can be used.
8 Catalog A-C Condensers
3. Pressure Switch Control with Control Transformer (Code MH)
This option provides direct control of discharge pressure through a series of factory-
mounted and wired pressure switches (designated as FCP-Fan Cycle Pressure Control-on
the wiring diagrams). As the condenser pressure increases, more pressure switches close
and start additional condenser fans. Field wiring between the compressorized product and
the remote condenser is not required. A control power transformer is included for 115-volt
power for the control voltage. Although the parameters of the refrigerant system dictates, it
is good practice to only use this option only for operation above ambient air temperatures of
35°F.
4. Pressure Switch Control with Control Transformer and SpeedTrol (Code VM)
This option is identical to the pressure switch control system described above except with
the addition of variable speed control to the “first on, last off” fan for each circuit. As
ambient temperatures drop below 35°F, the fan speed will be reduced to maintain the proper
minimum condenser pressure.
Table 2, WGZ Fan Staging and Field Wiring Circuits
Fan Stage
1 2 3 4 5 6 7 8 Fans
Circuit #1 Circuit#2
4 1 3 2 4 - -
6 1 3 5 2 4 6
8 1 3 5 7 2 4 6 8
10 1 3 5 7, 9 2 4 6 8, 10
12 1 3 5, 7 9, 11 2 4 6, 8 10, 12
Table 3, WGS Fan Staging and Field Wiring Circuits
Fan Stage Fans
Circuit #1 Circuit#2
4 1 2 - - - - 1 2 - - - -
6 1 2 3 - - - 1 2 3 - - -
8 1 2 3 4 - - 1 2 3 4 - -
10 1 2 3 4 5 - 1 2 3 4 5 -
12 1 2 3 4 5 6 1 2 3 4 5 6
Fan Locations
12 10 8 6 4 2 11 9 7 5 3 1
6 5 4 3 2 1
Electric Panel
Dual Row Units Circuit #1
Circuit #2
Electric Panel
Single Row Units Circuit #1
Catalog A-C Condensers 9
Options
Controls (See page 7 for details)
Fan Control
1. Standard control (Code NN) is contactors only
2. SpeedTrol (Code ST), variable fan speed on “first on, last off” fan per circuit.
Requires field-supplied fan cycling control on balance of fans or connection to
chiller’s Microtech controller
3. Pressure switch control (Code MH), factory mounted and wired pressure switches to
cycle fans. No speed control. No field control wiring required.
4. Pressure switch control plus FanTrol (Code VM), factory mounted pressure switches
to cycle fans plus SpeedTrol variable speed on “first on, last off” fan. No field
interconnection control wiring required.
Control transformer; factory-mounted for 24-volt or 115-volt secondary with primary the
same as unit main power supply. Provides control circuit power on units with field
supplied staging control.
Unit Perimeter base frame, Condenser legs mount on the frame to spread weight distribution
around the perimeter of the unit.
Extended legs; 20-inch legs are standard. Options available for 30, 36, or 42-inches high.
Cabinet material; galvanized steel is standard, options are aluminum or painted galvanized.
Side access panels; facilitate side access to the unit
Hinged fan deck; facilitates service access to fans and motors
Coils Fins-per-Inch: Standard is 14 fins-per-inch, options are 8, 12 or 14 fins-per-inch. Increasing
the number of fin per inch increases coil capacity, increases unit cost and can increase the
frequency of coil cleaning.
Coil material; Standard fin material is copper, options include:
• Copper fin
• Blackfin, aluminum fin material is precoated with phenolic coating, providing 1000-
hour salt spray protection.
• Electro-Fin, entire coil (fins, tubes, frame) is epoxy dipped and baked. Provides 3000-
hour salt spray protection.
Electrical Power supply; standard is 460/3/60, options are 208-220/3/60 and 575/3/60.
Oversized electrical box
Disconnect switch type; non-fused is standard, fused is optional
Sealtite wiring
Power connection; standard is non-fused disconnect switch. Options are:
• Contactors for each motor
• Fuses for each motor
• Circuit breakers for each motor
• Contactors for paired motors
• Fused for paired motors
• Circuit breakers for paired motors
10 Catalog A-C Condensers
Selection Procedure
The capacity for air-cooled condensers is based on Total Heat of Rejection (THR) at the
condenser. Total heat of rejection is equal to net refrigeration at the evaporator (compressor
capacity) plus the energy input into the refrigerant by the compressor (heat of compression).
The heat of compression will vary depending on the compressor manufacturer, type of
compressor and the operating conditions of the compressor. Whenever possible, obtain the
heat of compression value from the compressor manufacturer for the specific conditions.
If not available, the THR can be estimated using the following formula:
THR = (Compressor Capacity) X (Heat of Compression Factor in Table 4 or Table 5)
• Table 4 contains heat of compression factors for suction-cooled, hermetic compressors.
• Table 5 contains factors for open drive compressors (non-McQuay applications).
For refrigeration systems beyond the range of Table 4 and Table 5, use the following
equations to estimate THR:
Open Compressors:
THR = Compressor Capacity (BTUH) + (2545) x (Brake Horsepower, BHP)
Suction-Cooled Compressors:
THR = Compressor Capacity (BTUH) + (3413 X KW)
Altitude Correction The compressor capacity is affected by altitude. If the condenser location is above sea
level, a correction is required to the THR, as follows:
THR (altitude) = THR x altitude Correction Factor, Table 6
Selection Example • Compressor capacity: 350,000 Btuh
• Evaporator temperature: +35° F
• Condensing temperature: 120° F
• Ambient temperature 95° F
• Refrigerant: R-22
• Compressor type: Semi-hermetic, suction cooled
• Condenser type: ACH, 1140 rpm
• Condenser altitude: 1,000 feet
Step 1: Estimate Condenser THR From Table 4 for suction-cooled compressors, at +35° F suction and 120°F condensing
temperature, select a heat of compressor factor of 1.305. (interpolated from 30°F and 40°F
THR in BTU = Compressor capacity x Heat of Compression Factor
THR = 350,000 x 1.305 = 456,750 Btuh
Step 2: Correct for Altitude From Table 6 obtain an altitude correction factor of 1.02 for 1,000 feet.
THR (from step 1) x Altitude Correction Factor
456,750 x 1.02 = 465,885 Btuh
Step 3: Calculate Design Condenser T.D. Design Condenser Temperature Difference = condensing Temp – Ambient Temp
Design Condenser T.D. = 120°F - 95°F = 25 degrees F
Catalog A-C Condensers 11
Step 4: Condenser Selection
Condenser capacities for ACH condensers are located in Table 7. These capacities are
given in MBH/°TD. Convert the THR from step 2 to MBH/°TD by dividing by 1,000 and
the Design TD.
465,885 Btuh / 1000 / 25 = 18.6
Select Model ACH 040A S (single fan row) or ACH 040A D (dual row). The ACH 040A S
will be lower in cost, the ACH 040A D will have a more compact footprint.
Calculate actual TD and condensing temperature: determine the actual TD by dividing the
design THR by the condenser capacity. For the ACH 040A S:
Actual TD = 465.8 / 21.8 = 21.3 degrees F.
Actual condensing temperature is 95°F + 21.3 degrees = 116.3°F.
Table 4, Heat of Compression Factor for Suction Cooled Compressors
Suction Condensing Temperature °F
Temp. °F 90 °F 100 °F 110 °F 120 °F 130 °F
-40° 1.56 1.63 1.72 1.81 1.94
-30° 1.49 1.55 1.62 1.70 1.80
-20° 1.43 1.49 1.55 1.62 1.70
-10° 1.38 1.43 1.49 1.55 1.63
0° 1.34 1.38 1.43 1.49 1.56
5° 1.31 1.36 1.41 1.48 1.55
10° 1.29 1.34 1.39 1.44 1.52
15° 1.26 1.31 1.36 1.41 1.48
20° 1.24 1.28 1.33 1.38 1.44
25° 1.22 1.26 1.31 1.36 1.42
30° 1.20 1.24 1.28 1.33 1.39
40° 1.17 1.20 1.24 1.28 1.33
50° 1.13 1.16 1.20 1.24 1.28
Table 5, Heat of Compression Factor for Open Drive Compressors
Evaporator Condensing Temperature °F
Temp. °F 90 °F 100 °F 110 °F 120 °F 130 °F 140 °F
-30° 1.37 1.42 1.47 — — —
-20° 1.33 1.37 1.42 1.47 — —
-10° 1.28 1.32 1.37 1.42 1.47 —
0° 1.24 1.28 1.32 1.37 1.41 1.47
5° 1.23 1.26 1.30 1.35 1.39 1.45
10° 1.21 1.24 1.28 1.32 1.36 1.42
15° 1.19 1.22 1.26 1.30 1.34 1.40
20° 1.17 1.20 1.24 1.28 1.32 1.37
25° 1.16 1.19 1.22 1.26 1.30 1.35
30° 1.14 1.17 1.20 1.24 1.27 1.32
40° 1.12 1.15 1.17 1.20 1.23 1.28
50° 1.09 1.12 1.14 1.17 1.20 1.24
Table 6, Altitude Correction Factors
Altitude Correction Factors
0 1.00
1,000 1.02
2,000 1.05
3,000 1.07
4,000 1.10
5,000 1.12
6,000 1.15
7,000 1.17
12 Catalog A-C Condensers
Performance Data
ACH
Table 7, Capacity Data for ACH,
S=Single Fan Row, D=Dual Fan Row
R-22 MBH / 1° TD
Model Number of Fans per Row Optional
8 FPI Optional
10 FPI Optional
12 FPI Standard
14 FPI
ACH 014A S 1 6.4 7.3 8.0 8.6
ACH 016A S 1 7.8 8.7 9.5 10.0
ACH 020A S 2 9.6 10.7 11.7 12.4
ACH 025A S 2 13.1 14.5 15.6 16.3
ACH 030A S 2 15.7 17.1 18.1 19.2
ACH 040A S 3 19.7 21.8 23.4 24.5
ACH 040A D 4 19.2 21.4 23.4 24.8
ACH 050A S 3 23.5 25.7 27.1 29.9
ACH 050A D 2 26.2 29.1 31.2 32.6
ACH 055A S 4 26.2 29.1 31.2 32.6
ACH 060A D 2 31.4 34.2 36.1 38.3
ACH 060A S 4 31.4 34.2 36.1 38.3
ACH 070A S 5 33.6 37.1 39.3 41.3
ACH 080A D 3 39.4 43.6 46.7 48.9
ACH 080A S 5 40.5 44.0 46.1 48.6
ACH 100A D 3 47.0 51.3 54.2 59.8
ACH 100A S 6 48.6 52.8 55.3 58.3
ACH 110A D 4 52.5 58.2 62.3 65.3
ACH 110A S 7 55.4 61.0 64.7 67.5
ACH 130A D 4 62.7 68.4 72.3 76.7
ACH 140A D 5 67.1 74.2 78.5 82.6
ACH 160A D 5 81.0 88.0 92.1 97.2
ACH 200A D 6 97.2 105.6 110.5 116.6
ACH 225A D 7 110.8 121.9 129.5 135.0
Notes:
1. For 50 Hertz applications, multiply values by 0.92 2. For other refrigerants: R-407C and R410A = R-22 R-134a = R-22 x 0.95
Catalog A-C Condensers 13
ACL Performance Data
Table 8, Capacity Data for ACL
S=Single Fan Row, D=Dual Fan Row
R-22 MBH / 1° TD
Model Number of Fans per Row Optional
8 FPI Optional 10 FPI
Optional 12 FPI
Standard 14 FPI
ACL 014A S 1 5.9 6.7 7.3 7.9
ACL 016A S 1 7.2 8.0 8.6 9.0
ACL 020A S 2 9.1 10.1 11.0 11.7
ACL 025A S 2 12.6 13.9 14.9 15.7
ACL 030A S 2 15.0 16.1 16.8 17.6
ACL 040A D 3 18.1 20.2 22.0 23.3
ACL 040A S 3 19.0 20.9 22.3 23.4
ACL 050A S 4 22.5 24.2 25.2 26.9
ACL 055A S 3 25.3 27.8 29.7 31.2
ACL 050A D 5 25.3 27.8 29.7 31.4
ACL 060A S 2 30.0 32.3 33.6 35.2
ACL 060A D 3 30.0 32.3 33.6 35.2
ACL 070A S 4 32.1 35.5 37.4 39.0
ACL 080A S 2 38.4 41.6 43.4 44.7
ACL 080A D 6 37.9 41.8 44.5 46.9
ACL 100A S 4 46.1 49.9 52.1 53.6
ACL 100A D 4 45.0 48.4 50.4 53.7
ACL 110A S 5 50.5 55.0 58.0 60.2
ACL 110A D 7 50.6 55.7 59.4 62.4
ACL 130A D 4 60.0 64.6 67.2 70.4
ACL 140A D 5 64.2 70.9 74.7 78.0
ACL 160A D 5 76.9 83.1 86.8 89.4
ACL 200A D 6 90.4 99.8 104.1 107.3
ACL 225A D 7 101.1 110.0 116.0 120.3
NOTES:
1. For 50 Hertz applications, multiply values by 0.92 2. For other refrigerants:
R-407C and R410A = R-22 R-134a = R-22 x 0.95
14 Catalog A-C Condensers
ACX Performance Data Table 9, Capacity Data for ACX
S=Single Fan Row, D=Dual Fan Row
R-22 MBH / 1° TD
Model Number of Fans per Row Optional
8 FPI Optional 10 FPI
Optional 12 FPI
Standard 14 FPI
ACX 014A S 1 5.6 6.4 7.0 7.4
ACX 016A S 1 6.8 7.5 8.1 8.4
ACX 020A S 2 8.8 9.8 10.6 11.3
ACX 025A S 2 12.0 13.1 13.8 14.8
ACX 030A S 2 14.0 15.1 15.7 16.0
ACX 040A D 3 17.5 19.6 21.2 22.5
ACX 040A S 3 18.0 19.7 20.8 21.8
ACX 050A S 4 21.0 22.7 23.5 25.3
ACX 055A S 3 24.1 26.3 27.7 29.3
ACX 050A D 5 24.1 26.2 27.7 29.7
ACX 060A S 2 27.9 30.3 31.3 32.0
ACX 060A D 3 27.9 30.3 31.3 32.0
ACX 070A S 4 30.1 32.8 34.6 36.7
ACX 080A S 2 34.9 37.8 39.2 40.1
ACX 080A D 6 36.1 39.4 41.5 43.7
ACX 100A S 4 41.9 45.4 47.0 48.1
ACX 100A D 4 41.9 45.4 47.0 50.6
ACX 110A S 5 47.7 52.0 54.8 56.1
ACX 110A D 7 48.1 52.5 55.4 58.6
ACX 130A D 4 55.9 60.6 62.7 64.1
ACX 140A D 5 60.1 65.6 69.2 73.5
ACX 160A D 5 69.9 75.7 78.3 80.1
ACX 200A D 6 83.8 90.8 94.0 96.1
ACX 225A D 7 95.5 104.1 109.6 112.2
NOTES
1. For 50 Hertz applications, multiply values by 0.92 2. For other refrigerants:
R-407C and R410A = R-22 R-134a = R-22 x 0.95
Catalog A-C Condensers 15
Electrical Data
Table 10, ACH Electrical Data, S = Single Fan Row, D = Dual Fan Row
208-230/3/60 460/3/60 575/3/60
Model Number
of Rows
Number of Fans per
Row FLA MCA MOPD FLA MCA MOPD FLA MCA MOPD UNIT kW
ACH 014A S 1 1 7.0 15.0 25 3.5 15.0 15 2.8 15.0 15 1.9
ACH 016A S 1 1 7.0 15.0 25 3.5 15.0 15 2.8 15.0 15 1.9
ACH 020A S 1 2 14.0 20.0 35 7.0 15.0 15 5.6 15.0 15 3.8
ACH 025A S 1 2 14.0 20.0 35 7.0 15.0 15 5.6 15.0 15 3.8
ACH 030A S 1 2 14.0 20.0 35 7.0 15.0 15 5.6 15.0 15 3.8
ACH 040A S 1 3 21.0 22.8 40 10.5 15.0 20 8.4 15.0 15 5.8
ACH 050A S 1 3 21.0 22.8 40 10.5 15.0 20 8.4 15.0 15 5.8
ACH 055A S 1 4 28.0 29.8 45 14.0 15.0 20 11.2 15.0 15 7.7
ACH 060A S 1 4 28.0 29.8 45 14.0 15.0 20 11.2 15.0 15 7.7
ACH 070A S 1 5 35.0 36.8 50 17.5 20.0 25 14.0 15.0 20 9.6
ACH 080A S 1 5 35.0 36.8 50 17.5 20.0 25 14.0 15.0 20 9.6
ACH 100A S 1 6 42.0 43.8 60 21.0 21.9 30 16.8 20.0 25 11.5
ACH 110A S 1 7 49.0 50.8 70 24.5 25.4 35 19.6 20.3 25 13.5
ACH 040A D 2 2 28.0 29.8 45 14.0 15.0 20 11.2 15.0 15 7.7
ACH 050A D 2 2 28.0 29.8 45 14.0 15.0 20 11.2 15.0 15 7.7
ACH 060A D 2 2 28.0 29.8 45 14.0 15.0 20 11.2 15.0 15 7.7
ACH 080A D 2 3 42.0 43.8 60 21.0 21.9 30 16.8 20.0 25 11.5
ACH 100A D 2 3 42.0 43.8 60 21.0 21.9 30 16.8 20.0 25 11.5
ACH 110A D 2 4 56.0 57.8 70 28.0 28.9 35 22.4 23.1 30 15.4
ACH 130A D 2 4 56.0 57.8 70 28.0 28.9 35 22.4 23.1 30 15.4
ACH 140A D 2 5 70.0 71.8 90 35.0 35.9 45 28.0 28.7 35 19.2
ACH 160A D 2 5 70.0 71.8 90 35.0 35.9 45 28.0 28.7 35 19.2
ACH 200A D 2 6 84.0 85.8 100 42.0 42.9 50 33.6 34.3 40 23.1
ACH 225A D 2 7 98.0 99.8 110 49.0 49.9 50 39.2 39.9 45 26.9
NOTE: MOPD = Motor Overload Protection Device.
16 Catalog A-C Condensers
Table 11, ACL Electrical Data, S = Single Fan Row, D = Dual Fan Row
208-230/3/60 460/3/60 575/3/60 Model
Number of
Rows
Number of Fans per Row
FLA MCA MOPD FLA MCA MOPD FLA MCA MOPD
UNIT kW
ACL 014A S 1 1 6.6 15.0 25 3.3 15.0 15 2.6 15.0 15 1.4
ACL 016A S 1 1 6.6 15.0 25 3.3 15.0 15 2.6 15.0 15 1.4
ACL 020A S 1 2 13.2 15.0 30 6.6 15.0 15 5.2 15.0 15 2.7
ACL 025A S 1 2 13.2 15.0 30 6.6 15.0 15 5.2 15.0 15 2.7
ACL 030A S 1 2 13.2 15.0 30 6.6 15.0 15 5.2 15.0 15 2.7
ACL 040A S 1 3 19.8 21.5 35 9.9 15.0 15 7.8 15.0 15 4.1
ACL 050A S 1 4 19.8 21.5 35 9.9 15.0 15 7.8 15.0 15 4.1
ACL 055A S 1 3 26.4 28.1 45 13.2 15.0 20 10.4 15.0 15 5.4
ACL 060A S 1 2 26.4 28.1 45 13.2 15.0 20 10.4 15.0 15 5.4
ACL 070A S 1 4 33.0 34.7 50 16.5 20.0 25 13.0 15.0 20 6.8
ACL 080A S 1 2 33.0 34.7 50 16.5 20.0 25 13.0 15.0 20 6.8
ACL 100A S 1 4 39.6 41.3 50 19.8 20.6 25 15.6 20.0 20 8.1
ACL 110A S 1 5 46.2 47.9 60 23.1 23.9 30 18.2 20.0 25 9.5
ACL 040A D 2 3 26.4 28.1 45 13.2 15.0 20 10.4 15.0 15 5.4
ACL 050A D 2 5 26.4 28.1 45 13.2 15.0 20 10.4 15.0 15 5.4
ACL 060A D 2 3 26.4 28.1 45 13.2 15.0 20 10.4 15.0 15 5.4
ACL 080A D 2 6 39.6 41.3 50 19.8 20.6 25 15.6 20.0 20 8.1
ACL 100A D 2 4 39.6 41.3 50 19.8 20.6 25 15.6 20.0 20 8.1
ACL 110A D 2 7 52.8 54.5 70 26.4 27.2 35 20.8 21.5 25 10.8
ACL 130A D 2 4 52.8 54.5 70 26.4 27.2 35 20.8 21.5 25 10.8
ACL 140A D 2 5 66.0 67.7 80 33.0 33.8 40 26.0 26.7 30 13.5
ACL 160A D 2 5 66.0 67.7 80 33.0 33.8 40 26.0 26.7 30 13.5
ACL 200A D 2 6 79.2 80.9 90 39.6 40.4 45 31.2 31.9 35 16.2
ACL 225A D 2 7 92.4 94.1 110 46.2 47.0 50 36.4 37.1 40 18.9
NOTE: MOPD = Motor Overload Protection Device.
Catalog A-C Condensers 17
Table 12, ACX Electrical Data, S = Single Fan Row, D = Dual Fan Row
208-230/3/60 460/3/60 Model
Number of
Rows
Number of Fans per Row
FLA MCA MOPD FLA MCA MOPD
UNIT kW
ACX 014A S 1 1 4.8 15.0 15 2.4 15.0 15 1.1
ACX 016A S 1 1 4.8 15.0 15 2.4 15.0 15 1.1
ACX 020A S 1 2 9.6 15.0 20 4.8 15.0 15 2.2
ACX 025A S 1 2 9.6 15.0 20 4.8 15.0 15 2.2
ACX 030A S 1 2 9.6 15.0 20 4.8 15.0 15 2.2
ACX 040A S 1 3 14.4 20.0 25 7.2 15.0 15 3.4
ACX 050A S 1 4 14.4 20.0 25 7.2 15.0 15 3.4
ACX 055A S 1 3 19.2 20.4 30 9.6 15.0 15 4.5
ACX 060A S 1 2 19.2 20.4 30 9.6 15.0 15 4.5
ACX 070A S 1 4 24.0 25.2 35 12.0 15.0 15 5.6
ACX 080A S 1 2 24.0 25.2 35 12.0 15.0 15 5.6
ACX 100A S 1 4 28.8 30.0 40 14.4 20.0 20 6.7
ACX 110A S 1 5 33.6 34.8 45 16.8 20.0 20 7.8
ACX 040A D 2 3 19.2 20.4 30 9.6 15.0 15 4.5
ACX 050A D 2 5 19.2 20.4 30 9.6 15.0 15 4.5
ACX 060A D 2 3 19.2 20.4 30 9.6 15.0 15 4.5
ACX 080A D 2 6 28.8 30.0 40 14.4 20.0 20 6.7
ACX 100A D 2 4 28.8 30.0 40 14.4 20.0 20 6.7
ACX 110A D 2 7 38.4 39.6 50 19.2 20.0 25 8.9
ACX 130A D 2 4 38.4 39.6 50 19.2 20.0 25 8.9
ACX 140A D 2 5 48.0 49.2 60 24.0 24.6 30 11.2
ACX 160A D 2 5 48.0 49.2 60 24.0 24.6 30 11.2
ACX 200A D 2 6 57.6 58.8 70 28.8 29.4 35 13.4
ACX 225A D 2 7 67.2 68.4 80 33.6 34.2 40 15.6
NOTES: 1. MOPD = Motor Overload Protection Device 2. Model ACX units are not available in 575 volts.
18 Catalog A-C Condensers
Figure 1, Typical Twelve Fan, ACD/AQD, Wiring With Fan Pressure Switch Control
115
VF
AN
CO
NT
RO
L C
IRC
UIT
1P
H/5
0/6
0H
Z1
5 A
MP
S M
AX
OV
ER
CU
RR
EN
T P
RO
TE
CT
ION
ELE
CT
RIC
BO
X
FA
N M
OT
OR
ID
EN
TIF
ICA
TIO
N
HEADEREND
NO
TE
:1.
UN
IT M
US
T B
E G
RO
UN
DE
D2. T
O B
E F
IEL
D F
US
ED
, R
EF
ER
TO
U
NIT
DA
TA
PLA
TE
FO
R V
OLTA
GE
3. A
LL M
OT
OR
S A
RE
IN
HE
RE
NT
LY
P
RO
TE
CT
ED
4.
US
E 6
0°
C W
IRE
5.
WIR
ED
ON
LY
WIT
H C
ON
TR
OL
C
IRC
UIT
TR
AN
SF
OR
ME
R O
PT
ION
6.
US
E C
OP
PE
R C
ON
DU
CT
OR
S O
NLY
LE
GE
ND
:C
1-C
12 F
AN
CO
NTA
CT
OR
M1
-M12 F
AN
MO
TO
RF
CP
FA
N C
YC
LE
(R
EF
ER
TO
LA
BE
L
A
DJA
CE
NT
TO
FU
SE
HO
LD
ER
F
OR
RE
PL
AC
EM
EN
T)
OP
TIO
N
TR
AN
SF
OR
ME
RF
73A
-500V
SE
E N
OT
E 5
DO
OR
DIS
CO
NN
EC
TS
WIT
CH
MA
IN P
OW
ER
CIR
CU
IT3P
H/5
0/6
0H
Z
GN
D
TE
RM
INA
LB
OA
RD
L1
L2
L3
T1
T2
T3
OP
TIO
N
F1
460
VO
R230
VIN
PU
T
F2
24
VL
1L2
TRANSFORMER
C2
L1
L2
T1
T2
C1
L1
L2
T1
T2
GN
D
P66
L1
M1
GN
D
EL
EC
TR
ON
ICFA
NS
PE
ED
CO
NT
RO
L
P66
L1
M1
GN
D
EL
EC
TR
ON
ICFA
NS
PE
ED
CO
NT
RO
L
GN
D
M1
M2
L2 R
L1 C
S
VA
RIA
BLE
SP
EE
DC
ON
TR
OL M
OT
OR
L2 R
L1 C
S
VA
RIA
BLE
SP
EE
DC
ON
TR
OL M
OT
OR
MC
QU
AY
PR
ES
SU
RE
FA
N C
YC
LIN
GFA
NS
/CIR
CU
IT
5.6
FC
P#1,
#2
19
0/1
40
FC
P#3
, #
4
210
/15
0
FC
P#
5, #
6220
/16
0
FC
P#7
, #
8
230/1
70
AD
JU
STA
BL
E R
AN
GE
(M
INIM
UM
RA
NG
E 1
25
- 2
50#)
(DIF
FE
RE
NT
IAL R
AN
GE
20 -
10
0#)
C1
2
C10
C11
C9
C8
C5
FC
P 8
FC
P 7
FC
P 6
FC
P 5
C6
C7
FC
P 1
FC
P 2
FC
P 3
FC
P 4
C4
C3
C2
C1
GN
DT
ER
MIN
AL
BO
AR
D
T1
T2
F12
C1
2
F11
C11
F10
C10
F9
C9
F8
C8
F7
C7
F6
C6
F5
C5
F4
C4
F3
C3
M3
M4
M5
M6
M7
M8
M9
M10
M11
M12
L1
L2
L3
L1
L2
L3
L1
L2
L3
L1
L2
L3
L1
L2
L3
L1
L2
L3
L1
L2
L3
L1
L2
L3
L1
L2
L3
L1
L2
L3
L1
L2
T1
T2
L3 T3
L1
L2
T1
T2
L3 T3
L1
L2
T1
T2
L3 T3
L1
L2
T1
T2
L3 T3
L1
L2
T1
T2
L3 T3
L1
L2
T1
T2
L3 T3
L1
L2
T1
T2
L3 T3
L1
L2
T1
T2
L3 T3
L1
L2
T1
T2
L3 T3
L1
L2
T1
T2
L3 T3
Catalog A-C Condensers 19
Figure 2, Typical Twelve Fan, ACD/AQD, Wiring with Contactors for Field Installed Control
FA
N M
OT
OR
IN
DE
NT
IFIC
AT
ION
HEADEREND
ELE
CT
RIC
BO
X
NO
TE
:1. U
NIT
MU
ST
BE
GR
OU
ND
ED
2. T
O B
E F
IELD
FU
SE
D, R
EF
ER
TO
U
NIT
DA
TA
PLA
TE
FO
R V
OLTA
GE
3. A
LL M
OT
OR
S A
RE
IN
HE
RE
NT
LY P
RO
TE
CT
ED
4. U
SE
60°
C W
IRE
5. 11
5 V
OLT
CO
NT
RO
L C
IRC
UIT
6. U
SE
CO
PP
ER
CO
ND
UC
TO
RS
ON
LY
LE
GE
ND
:C
1-C
12 F
AN
CO
NTA
CT
OR
M1-M
12 F
AN
MO
TO
RF
CP
FA
N C
YC
LE
PR
ES
SU
RE
CO
NT
RO
LF
1-F
12 F
US
ES
(R
EF
ER
TO
LA
BE
L A
DJA
CE
NT
TO
FU
SE
HO
LD
ER
FO
R R
EP
LA
CE
ME
NT
)
OP
TIO
NT
RA
NS
FO
RM
ER
F7
3A
-500V
MA
IN P
OW
ER
CIR
CU
IT3
PH
/50/6
0H
Z
DO
OR
DIS
CO
NN
EC
TS
WIT
CH
GN
D
L1
L2
L3
TE
RM
INA
LB
OA
RD
T1
T2
T3
460V
OR
250V
INP
UT
F1
24V
L1
L2
OP
TIO
N
C1
GN
D
TRANSFORMER
GN
D
L2
L1 T1
T2
P66
GN
D
L1
M1
M1
EL
EC
TR
ICF
AN
SP
EE
DC
ON
TR
OL
VA
RIA
BL
E S
PE
ED
CO
NT
RO
L M
OT
OR
EL
EC
TR
ICF
AN
SP
EE
DC
ON
TR
OL
P66
GN
D
L1
M1
L2 R
L1 C
S
VA
RIA
BL
E S
PE
ED
CO
NT
RO
L M
OT
OR
M2
S
L1 C
L2 R
TE
RM
INA
L B
OA
RD
SF
OR
FIE
LD
CO
NT
RO
LO
F F
AN
CO
NTA
CT
OR
S
TE
RM
INA
LB
OA
RD
6
T2
T1
C11
C8
C7
C5
C3
C1
C12
C1
0
C9
C6
C4
C2
TE
RM
INA
LB
OA
RD
5
TE
RM
INA
LB
OA
RD
4T
ER
MIN
AL
BO
AR
D 1
0
TE
RM
INA
LB
OA
RD
11
TE
RM
INA
LB
OA
RD
12
TE
RM
INA
LB
OA
RD
9T
ER
MIN
AL
BO
AR
D 3
TE
RM
INA
LB
OA
RD
2T
ER
MIN
AL
BO
AR
D 8
TE
RM
INA
LB
OA
RD
7T
ER
MIN
AL
BO
AR
D 1
T2
T1
T2
T1
T2
T1
T2
T1
T2
T1
T2
T1
T2
T1
T2
T1
T2
T1
T2
T1
T2
T1
FA
N C
ON
TR
OL C
IRC
UIT
1P
H/5
0/6
0H
Z15 A
MP
S M
AX
OV
ER
CU
RR
EN
T P
RO
TE
CT
ION
M3
M4
M5
M6
M7
M8
M9
M10
M11
M12
L1
L2
L3
L1
L2
L3
L1
L2
L3
L1
L2
L3
L1
L2
L3
L1
L2
L3
L1
L2
L3
L1
L2
L3
L1
L2
L3
L1
L2
L3C
3
C4
C5
C6
C7
C8
C9
C10
C11
C12
F12
F11
F10
F9
F8
F7
F6
F5
F4
F3
L1
L2
L3
T1
T2
T3
L1
L2
L3
T1
T2
T3
L1
L2
L3
T1
T2
T3
L1
L2
L3
T1
T2
T3
L1
L2
L3
T1
T2
T3
L1
L2
L3
T1
T2
T3
L1
L2
L3
T1
T2
T3
L1
L2
L3
T1
T2
T3
L1
L2
L3
T1
T2
T3
L1
L2
L3
T1
T2
T3
20 Catalog A-C Condensers
Physical Data
Table 13, Physical Properties of Models ACH, ACL, ACX
ACH ACL ACX Model Size Fans
/Row CFM
Conn (in.)
Weight (lbs)
Fans /Row
CFM Conn (in.)
Weight (lbs)
Fans /Row
CFM Conn (in.)
Weight (lbs)
014 S 1 9,900 1 3/8 330 1 8,400 1 3/8 330 1 7,600 1 3/8 330
016 S 1 9,500 1 3/8 360 1 8,000 1 3/8 360 1 7,300 1 3/8 360
020 S 2 20,500 1 3/8 580 2 17,500 1 3/8 580 2 15,900 1 3/8 580
025 S 2 19,800 1 5/8 630 2 16,700 1 5/8 630 2 15,200 1 5/8 630
030 S 2 19,000 2 1/8 680 2 16,100 2 1/8 680 2 14,700 2 1/8 680
040 S 3 29,700 2 1/8 930 3 25,100 2 1/8 930 3 22,900 2 1/8 930
050 S 3 28,500 2 1/8 1000 3 24,100 2 1/8 1000 3 22,000 2 1/8 1000
055 S 4 38,600 2 1/8 1210 4 32,800 2 1/8 1210 4 29,800 2 1/8 1210
060 S 4 37,000 2 5/8 1310 4 31,200 2 5/8 1310 4 28,400 2 5/8 1310
070 S 5 48,300 2 5/8 1510 5 41,000 2 5/8 1510 5 37,300 2 5/8 1510
080 S 5 46,200 2 5/8 1640 5 39,100 2 5/8 1640 5 35,500 2 5/8 1640
100 S 6 55,400 2 5/8 1950 6 46,900 2 5/8 1950 6 42,600 2 5/8 1950
110 S 7 64,700 (2)2 5/8 2240 7 54,700 (2)2 5/8 2240 7 49,700 (2)2 5/8 2240
040 D 2 41,000 (2)1 3/8 1240 2 35,000 (2)1 3/8 1240 2 31,700 (2)1 3/8 1240
050 D 2 39,600 (2)1 5/8 1340 2 33,500 (2)1 5/8 1340 2 30,500 (2)1 5/8 1340
060 D 2 38,100 (2)2 1/8 1440 2 32,100 (2)2 1/8 1440 2 29,300 (2)2 1/8 1440
080 D 3 59,400 (2)2 1/8 1990 3 50,200 (2)2 1/8 1990 3 45,700 (2)2 1/8 1990
100 D 3 57,100 (2)2 1/8 2140 3 48,200 (2)2 1/8 2140 3 44,000 (2)2 1/8 2140
110 D 4 77,200 (2)2 1/8 2630 4 65,600 (2)2 1/8 2630 4 59,700 (2)2 1/8 2630
130 D 4 73,900 (2)2 5/8 2830 4 62,500 (2)2 5/8 2830 4 56,800 (2)2 5/8 2830
140 D 5 96,500 (2)2 5/8 3290 5 82,000 (2)2 5/8 3290 5 74,600 (2)2 5/8 3290
160 D 5 92,400 (2)2 5/8 3540 5 78,100 (2)2 5/8 3540 5 71,000 (2)2 5/8 3540
200 D 6 110,900 (2)2 5/8 4230 6 93,700 (2)2 5/8 4230 6 85,200 (2)2 5/8 4230
225 D 7 129,400 (4)2 5/8 4910 7 109,300 (4)2 5/8 4910 7 99,400 (4)2 5/8 4910
Catalog A-C Condensers 21
Dimensions (See Table 13 for Connection Sizes)
22 Catalog A-C Condensers
Application Data
Fan Cycle Control Panels • Fan cycling panels are available to cycle fans on condensing pressure or interface with
customers controls.
• All fans are cycled with contactors. Fans cycle separately with one contactor per fan,
but may have more than one contactor (fan) per control step.
• Standard control circuit voltage is 115 volts. Control circuits with 24 or 230 volts are
available on request.
• Control circuits are factory wired to a control circuit terminal board for convenient
single point field wiring.
• Standard control circuits require an external power supply for powering control circuit
(by others). A control circuit transformer is available on condensers as a factory
mounted option to provide power to the control circuit.
Discharge Pressure Fan Cycling Condenser fans can be controlled by pressure switches which monitor condenser pressure.
Pressure fan cycling is ideal for those condensers which see a significant change in
condenser load. Since the controls sense condensing pressure, they can cycle fans at any
ambient temperature, in response to a change in condensing pressure.
Variable Speed Condenser head pressure control is provided by varying the air flow through the condenser
by changing the RPM of the condenser fan. The fan motor next to the header end of the
condenser is the variable speed fan. The remainder of the fans are constant speed and are
cycled separately using pressure control or customer input signal.
On condensers with two rows of fans, two variable speed fans are provided (one per circuit)
and the remainder of the fans are constant speed. The variable speed control package
consists of a special variable speed motor (1140 RPM, single phase) and an electronic
speed control which controls the speed of the motor in response to condensing pressure.
Fan motor, speed control and all related components are all factory mounted and wired.
Variable speed control provides more even system operation than pure fan cycling.
Condenser Flooding Control Back-flooding the condenser with liquid refrigerant, controlled by a field-supplied back-
flooding valve, and using refrigerant from a field-supplied receiver, can be used effectively
to control compressor discharge pressure. This technique reduces the condenser’s effective
condensing surface.
Using fan control in conjunction with back-flooding will greatly reduce the extra amount of
refrigerant required to flood the condenser. The extra quantity of refrigerant required with
either method is given in installation manual, IOMM A-C Cond
Catalog A-C Condensers 23
Sound Data
Table 14, Sound in Dba for ACH Models
Feet from Edge of Unit Fan Configuration 5 10 20 40
1 X 2 77 74 69 65
1 X 3 79 76 71 67
1 X 4 80 77 72 68
1 X 5 81 78 73 69
1 X 6 82 79 74 70
1 x 7 83 80 75 71
2 X 2 79 76 71 67
2 X 3 81 78 73 69
2 X 4 82 79 74 70
2 X 5 83 80 75 71
2 X 6 84 81 76 72
2 x 7 85 82 77 73
Table 15, Sound in Dba for ACL and ACX Models
Feet from Edge of Unit Fan Configuration 5 10 20 40
1 X 2 69 65 61 56
1 X 3 71 67 63 58
1 X 4 72 68 64 59
1 X 5 73 69 65 60
1 X 6 74 70 66 61
1 x 7 75 71 67 62
2 X 2 71 67 63 58
2 X 3 73 69 65 60
2 X 4 74 70 66 61
2 X 5 75 71 67 62
2 X 6 76 72 68 63
2 x 7 77 73 69 64
24 Catalog A-C Condensers
Engineering Guide Specifications
Furnish and install as specified and as shown on plans McQuay Model ____ air-cooled
condenser(s), arranged for vertical air flow. Condenser shall be multiple fan design and
shall perform in accordance with {following schedule} {schedule on plan}.
Each condenser shall consist of cabinet, condenser coil, multiple direct drive propeller fans
driven by independent fan motors, fan guards and mounting legs. All fan motors shall be
factory wired to a common electrical junction box.
Condenser coil - The condenser shall be constructed of seamless copper tubes on a
staggered tube pattern. Tubes shall be mechanically expanded into continuous, corrugated,
rippled {aluminum}{copper} plate type fins for permanent metal-to-metal contact. The fins
shall have full depth fin collars completely covering the copper tube.
The coil shall be "floating tube type" with refrigerant carrying tubes not touching the
galvanized end plates. The coil shall be supported by non-refrigerant carrying copper tubes
that are expanded into the coil.
Heavy wall copper headers shall have dimpled stub tubes from the coil and a beaded hole
for the large connection tube, both items to assure good brazing surface and joint strength.
Headers to be field piped to prevent excessive vibration from discharge gas pulsations.
Coil to have an integral subcooler pre-piped from the condenser outlet. Subcooler to be
rated at 10 degrees of subcooling at a 25 degree temperature difference between the
ambient and the condensing temperature.
Coils shall have a working pressure of 400 psig. A field supplied 450 psig relief device, one
per circuit, is required on units up to two circuits.
Coils shall be factory leak tested, dehydrated and connection ends spun closed. Unit shall
be shipped under pressure with a dry air or nitrogen holding charge.
Cabinet - The cabinet shall be beige pre-painted G90 galvanized steel. Motors shall be
supported by 11 gauge galvanized steel rail fastened to the coil center and end supports.
Each fan section shall be in an individual compartment, separated from other fan sections
by cabinetry.
All legs and lifting brackets shall be 11 gauge galvanized steel.
Motors - Motors shall be open drip proof motor with internal overloads.
Fan and Fan Guard - Fans shall have heavy gauge aluminum blades with painted steel
spider. Fan guards shall be PVC coated steel.
Electrical - Unit shall have weatherproof electric control panel with factory mounted door
interrupt switch. Control voltage shall be 120 volts with individual contactors and fuse
protection for each motor.
Catalog A-C Condensers 25
Head Pressure Control- Provide a means of fan cycling to maintain head pressure down to
____°F. This shall be automatic in operation without daily or seasonal adjustment.
Controls shall be factory-mounted and wired in a weatherproof electric panel. Control shall
be as follows and would be one of three options:
A. Terminal board to individual contactor for field connection to the chiller MicoTech
controller that cycles fans based on load requirements and ambient temperature.
B. Pressure control for each contactor cycling individual motors.
C. Variable speed motor controlled by sensing head pressure to modulate speed of header
fan in relation to changing pressures in combination with A or B
Options to be Supplied
• Cabinet Material; aluminum or painted galvanized in lieu of standard galvanized
• Extended legs; 30-inch, 36-inch, or 42-inch in lieu of standard 20-inch legs
• Hinged Fan Deck
• Coil Material; standard fin material is copper, options include:
• Copper fin
• Blackfin, aluminum fin material is precoated with phenolic coating, providing
1000-hour salt spray protection.
• Electro-Fin, entire coil (fins, tubes, frame) is epoxy dipped and baked. Provides
3000-hour salt spray protection.
• Power Connections in lieu of standard non-fused disconnect switch
• Contactors or fuses or circuit breakers for each motor
• Contactors or fuses or circuit breakers for each pair of motors
26 Catalog A-C Condensers
Notes
(800) 432-1342….www.mcquay.com CAT A-C Cond (3-07)
This document contains the most current product information as of this printing. For the most up-to-date product information, please go to www.mcquay.com.