McQuay MPS015AYCL Installation Manual

1

Maverick I™
Commercial Packaged Rooftop System
Cooling Only or Heating & Cooling

Electric/Electric

Models MPS015AY – 020AY
15 to 20 Tons

Installat

ion and Maintenance Manual

IM 867

Group: Applied Systems

Part Number: 92-102421-06-00

Date: March 2007

© 2007 McQuay International

ARI Standard
210/240 UAC

™

2 IM 867

Table of Contents

Table of Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Checking Product Received . . . . . . . . . . . . . . . . . . . . 3

Equipment Protection . . . . . . . . . . . . . . . . . . . . . . . . . 3

Unit Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

General Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-9

Electrical & Physical Data Tables. . . . . . . . . . . . . . . . . . . . . . . . 10

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Outside Slab Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Rooftop Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Ductwork. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Horizontal Conversion Procedure . . . . . . . . . . . . . . . 13

Downflow to Horizontal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Electrical Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Power Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Control Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Internal Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Grounding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Indoor Air Flow Data . . . . . . . . . . . . . . . . . . . . . . . . . 15

Airflow Performance Tables . . . . . . . . . . . . . . . . . . . 16

Pre-Start Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Cooling Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Heating Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Auxiliary Heat. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Heater Kit Characteristics. . . . . . . . . . . . . . . . . . . . . 20

Trouble Shooting Chart. . . . . . . . . . . . . . . . . . . . . . . 21

Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . 22-23

Charging Charts . . . . . . . . . . . . . . . . . . . . . . . . . . 24-25

IM 867

3

Introduction

This manual contains the installation and operating instruc­tions for your packaged rooftop system. There are a few pre­cautions that should be taken to derive maximum satisfaction
from it. Improper installation can result in unsatisfactory
operation or dangerous conditions.

Read this manual and any instructions packaged with separate
equipment required to make up the system prior to installa­tion. Give this manual to the owner and explain its provisions.
The owner should retain this manual for future reference.

Checking Product Received

Upon receiving unit, inspect it for any shipping damage.
Claims for damage, either apparent or concealed should be
filed immediately with the shipping company. Check con-

densing unit model number, electrical characteristics and
accessories to determine if they are correct. Check system
components (evaporator coil, condensing unit, evaporator
blower, etc.) to make sure they are properly matched.

Equipment Protection From The
Environment

The metal parts of this unit may be subject to rust or deterio­ration in adverse environmental conditions. This oxidation
could shorten the equipment’s useful life. Salt spray, fog or
mist in seacoast areas, sulphur or chlorine from lawn watering
systems, and various chemical contaminants from industries
such as paper mills and petroleum refineries are especially
corrosive.

If the unit is to be installed in an area where contaminants
are likely to be a problem, special attention should be
given to the equipment location and exposure.

1 Avoid having lawn sprinkler heads spray directly on the

unit cabinet.

2 In coastal areas, locate the unit on the side of the build-

ing away from the waterfront.

3 Shielding provided by a fence or shrubs may give some

protection.

Regular maintenance will reduce the buildup of contami­nents and help to protect the unit’s finish.

1 Frequent washing of the cabinet, fan blade and coil with

fresh water will remove most of the salt or other contam­inants that build up on the unit.

2 Regular cleaning and waxing of the cabinet with a good

automobile polish will provide some protection.

3 A good liquid cleaner may be used several times a year

to remove matter that will not wash off with water.

Several different types of protective coatings are offered in
some areas. These coatings may provide some benefit, but the
effectiveness of such coating materials cannot be verified by
the equipment manufacturer.

The best protection is frequent cleaning, maintenance and
minimal exposure to contaminant.

Proposition 65: This unit contains fiberglass insulation.
Respirable particles of fiberglass are known to the state of
California to cause cancer.

▲▲

WARNING

!

The manufacturer’s warranty does not cover any damage or
defect to the air conditioner caused by the attachment or use
of any components, accessories or devices (other than those
authorized by the manufacturer) into, onto or in conjunction
with the air conditioner. You should be aware that the use of
unauthorized components, accessories or devices may
adversely affect the operation of the air conditioner and may
also endanger life and property. The manufacturer disclaims
any responsibility for such loss or injury resulting from the
use of such unauthorized components, accessories or
devices.

▲▲

DANGER

!

Disconnect all power to the unit before starting maintenance.
Failure to do so can result in severe electrical shock or
death.

▲▲

DANGER

!

4 IM 867

Figure 1: Unit Dimensions (Bottom View)

Figure 2: Unit Dimensions (Bottom View)

A0886-16

A0886-20

RETURN

AIR

SUPPLY

AIR

IM 867

5

Figure 3: Unit Dimensions

Figure 4: Unit Dimensions – Back View

A0886-17

A0886-21

Figure 5: Component Location

A0886-33

OUTDOOR FAN #4

OUTDOOR FAN #3

OUTDOOR COIL

COMPRESSOR #4

[NOT USED ON RKNB-A180]

COMPRESSOR #3

[COMPRESSOR #2 ON RKNB-A180 MODELS]

FILTER RACK

RETURN COMPARTMENT

OUTDOOR FAN #1

OUTDOOR FAN #2

146.094

42.750

18.443

5.876

20.000

4.483

7.220

47.221

50.000

13.344

SUPPLY COVER

RETURN COVER

COMPRESSOR ACCESS

146.094

58.836

4.610

19.594

24.319

25.869

6.230

46.185

OUTDOOR
FANS

3.815

REMOVE COVER PLATE WHEN
CONVERTING FROM DOWN FLOW
TO HORIZONTAL CONFIGURATION.

13.719

6.843

3.730

OPTIONAL OUTDOOR
AIR HOOD LOCATION

OPTIONAL EXHAUST

HOOD LOCATION

6 IM 867

Figure 6: Unit Dimensions & Component Access – Front View

A0886-18

Figure 7: Unit Dimensions & Component Access

A0886-19

Figure 8: Internal Component Locations

A0886-32

HIGH/LOW CIRCUIT #3

HIGH/LOW CIRCUIT #1

50.000

8.018

5.625

33.250

46.904

146.094

SINGLE POWER ENTRY

CONDENSATE DRAIN

HIGH/LOW CIRCUIT #2

HIGH/LOW CIRCUIT #4

HIGH PRESSURE SWITCH

CRKT #3

HIGH PRESSURE SWITCH

CRKT #4

HIGH PRESSURE SWITCH

CRKT #1

HIGH PRESSURE SWITCH

CRKT #2

144.750

57.438

50.000

5.625

33.250

CONTROL POWER ENTRY

SINGLE POWER ENTRY

ELECTRIC HEAT ACCESS

BLOWER ACCESS

COMPRESSOR ACCESS

CONDENSATE DRAIN
1” FNPT

CONTROL/FILTER
ACCESS

OUTDOOR
FANS

OUTDOOR FAN #4

OUTDOOR FAN #3

OUTDOOR FAN #2

OUTDOOR FAN #1

INDOOR COIL

OUTDOOR COIL

COMPRESSOR #2
[NOT ON RLNB-A180 MODELS

COMPRESSOR #1

INDOOR MOTOR

BLOWERS

FILTER OPENING

CONTROL COMPARTMENT

OPTIONAL ELECTRIC
HEAT COMPARTMENT

IM 867

7

NOTES:

1. Cooling Performance is rated at 95° F ambient, 80° F entering dry bulb, 67° F entering wet bulb. Gross capacity does
not include the effect of fan motor heat. ARI capacity is net and includes the effect of fan motor heat. Units are suitable
for operation to 20% of nominal cfm. Units are certified in accordance with the Unitary Air Conditioner Equipment
certification program, which is based on ARI Standard 210/240 or 360.

2. EER and/or SEER are rated at ARI conditions a

nd in accordance with DOE test procedures.

3. Integrated Part Load Value is rated in accordance with ARI Standard 210/240 or 360. Units are rated at 80° F ambient,
80° F entering dry bulb, and 67° F entering wet bulb at ARI rated cfm.

4. Outdoor Sound Rating shown is tested in accordance with ARI Standard 270.

[ ] Designates Metric Conversions

General Data

NOM. SIZES 15 & 20 TONS [52.8-70.3 kW] ASHRAE 90.1-2004 COMPLIANT MODELS

McQuay MPS Series 015AYCL 015AYCM 015AYDL 015AYDM
Cooling Performance

Gross Cooling Capacity Btu [kW] 188,000 [55.08] 188,000 [55.08] 188,000 [55.08] 188,000 [55.08]
EER/SEER
Nominal CFM/ARI Rated CFM [L/s] 6000/6000 [2831/2831] 6000/6000 [2831/2831] 6000/6000 [2831/2831] 6000/6000 [2831/2831]
ARI Net Cooling Capacity Btu [kW] 180,000 [52.74] 180,000 [52.74] 180,000 [52.74] 180,000 [52.74]
Net Sensible Capacity Btu [kW] 134,000 [39.26] 134,000 [39.26] 134,000 [39.26] 134,000 [39.26]
Net Latent Capacity Btu [kW] 46,000 [13.48] 46,000 [13.48] 46,000 [13.48] 46,000 [13.48]
Integrated Part Load Value
Net System Power kW 17.65 17.65 17.65 17.65

Compressor

No./Type 4/Scroll 4/Scroll 4/Scroll 4/Scroll

Outdoor Sound Rating (dB)
Outdoor Coil—Fin Type Louvered Louvered Louvered Louvered

Tube Type Rifled Rifled Rifled Rifled
Tube Size in. [mm] OD 0.375 [9.5] 0.375 [9.5] 0.375 [9.5] 0.375 [9.5]
Face Area sq. ft. [sq. m] 36 [3.34] 36 [3.34] 36 [3.34] 36 [3.34]
Rows / FPI [FPcm] 1 / 22 [9] 1 / 22 [9] 1 / 22 [9] 1 / 22 [9]

Indoor Coil—Fin Type Louvered Louvered Louvered Louvered

Tube Type Rifled Rifled Rifled Rifled
Tube Size in. [mm] 0.375 [9.5] 0.375 [9.5] 0.375 [9.5] 0.375 [9.5]
Face Area sq. ft. [sq. m] 15.75 [1.46] 15.75 [1.46] 15.75 [1.46] 15.75 [1.46]
Rows / FPI [FPcm] 4 / 13 [5] 4 / 13 [5] 4 / 13 [5] 4 / 13 [5]
Refrigerant Control Capillary Tubes Capillary Tubes Capillary Tubes Capillary Tubes
Drain Connection No./Size in. [mm] 1/1 [25.4] 1/1 [25.4] 1/1 [25.4] 1/1 [25.4]

Outdoor Fan—Type Propeller Propeller Propeller Propeller

No. Used/Diameter in. [mm] 4/24 [609.6] 4/24 [609.6] 4/24 [609.6] 4/24 [609.6]
Drive Type/No. Speeds Direct/1 Direct/1 Direct/1 Direct/1
CFM [L/s] 16000 [7550] 16000 [7550] 16000 [7550] 16000 [7550]
No. Motors/HP 4 at 1/3 HP 4 at 1/3 HP 4 at 1/3 HP 4 at 1/3 HP
Motor RPM 1075 1075 1075 1075

Indoor Fan—Type FC Centrifugal FC Centrifugal FC Centrifugal FC Centrifugal

No. Used/Diameter in. [mm] 2/15x15 [381x381] 2/15x15 [381x381] 2/15x15 [381x381] 2/15x15 [381x381]
Drive Type/No. Speeds Belt/Variable Belt/Variable Belt/Variable Belt/Variable
No. Motors 1 1 1 1
Motor HP 3 5 3 5
Motor RPM 1725 1725 1725 1725
Motor Frame Size 56 184 56 184

Filter—Type Disposable Disposable Disposable Disposable

Furnished Yes Yes Yes Yes
(No.) Size Recommended in. [mm] (3)2x18x18 [51x457x457] (3)2x18x18 [51x457x457] (3)2x18x18 [51x457x457] (3)2x18x18 [51x457x457]

Refrigerant Charge Oz. (Sys. 1/Sys. 2) [g] 82/72 [2325/2041] 82/72 [2325/2041] 82/72 [2325/2041] 82/72 [2325/2041]
Weights

Net Weight lbs. [kg] 1677 [761] 1707 [774] 1677 [761] 1707 [774]
Ship Weight lbs. [kg] 1897 [860] 1927 [874] 1897 [860] 1927 [874]

1

2

3

4

10.2/NA 10.2/NA 10.2/NA

10.4 10.4 10.4 10.4

91 91 91 91

(3)2x18x24 [51x457x610] (3)2x18x24 [51x457x610] (3)2x18x24 [51x457x610] (3)2x18x24 [51x457x610]

CONTINUED

10.2/NA

8 IM 867

NOTES:

1. Cooling Performance is rated at 95° F ambient, 80° F entering dry bulb, 67° F entering wet bulb. Gross capacity does
not include the effect of fan motor heat. ARI capacity is net and includes the effect of fan motor heat. Units are suitable
for operation to 20% of nominal cfm. Units are certified in accordance with the Unitary Air Conditioner Equipment
certification program, which is based on ARI Standard 210/240 or 360.

2. EER and/or SEER are rated at ARI conditions a

nd in accordance with DOE test procedures.

3. Integrated Part Load Value is rated in accordance with ARI Standard 210/240 or 360. Units are rated at 80° F ambient,
80° F entering dry bulb, and 67° F entering wet bulb at ARI rated cfm.

4. Outdoor Sound Rating shown is tested in accordance with ARI Standard 270.

McQuay MPS Series 015AYYL 015AYYM 020AYCL 020AYCM
Cooling Performance

1

Gross Cooling Capacity Btu [kW] 188,000 [55.08] 246,000 [72.08] 246,000 [72.08] 246,000 [72.08]
EER/SEER

2

10.2/NA 10.2/NA 9.7/NA
Nominal CFM/ARI Rated CFM [L/s] 6000/6000 [2831/2831] 6000/6000 [2831/2831] 8000/7400 [3775/3492] 8000/7400 [3775/3492]
ARI Net Cooling Capacity Btu [kW] 180,000 [52.74] 180,000 [52.74] 232,000 [67.98] 232,000 [67.98]
Net Sensible Capacity Btu [kW] 134,000 [39.26] 134,000 [39.26] 168,000 [49.22] 168,000 [49.22]

Net System Power kW 17.65 17.65 23.92 23.92

Net Weight lbs. [kg] 1677 [761] 1707 [774] 1843 [836] 1864 [846]

Integrated Part Load Value

3

10.4 10.4 9.9 9.9

Compressor

No./Type 4/Scroll 4/Scroll 4/Scroll 4/Scroll

Outdoor Sound Rating (dB)

4

91 91 91 91

Outdoor Coil—Fin Type Louvered Louvered Louvered Louvered

Tube Type Rifled Rifled Rifled Rifled
Tube Size in. [mm] OD 0.375 [9.5] 0.375 [9.5] 0.375 [9.5] 0.375 [9.5]
Face Area sq. ft. [sq. m] 36 [3.34] 36 [3.34] 36 [3.34] 36 [3.34]
Rows / FPI [FPcm] 1 / 22 [9] 1 / 22 [9] 2 / 22 [9] 2 / 22 [9]

Net Latent Capacity Btu [kW] 46,000 [13.48] 46,000 [13.48] 64,000 [18.75] 64,000 [18.75]

Indoor Coil—Fin Type Louvered Louvered Louvered Louvered

Tube Type Rifled Rifled Rifled Rifled
Tube Size in. [mm] 0.375 [9.5] 0.375 [9.5] 0.375 [9.5] 0.375 [9.5]
Face Area sq. ft. [sq. m] 15.75 [1.46] 15.75 [1.46] 15.75 [1.46] 15.75 [1.46]
Rows / FPI [FPcm] 4 / 13 [5] 4 / 13 [5] 4 / 13 [5] 4 / 13 [5]
Refrigerant Control Capillary Tubes Capillary Tubes Capillary Tubes Capillary Tubes
Drain Connection No./Size in. [mm] 1/1 [25.4] 1/1 [25.4] 1/1 [25.4] 1/1 [25.4]

Outdoor Fan—Type Propeller Propeller Propeller Propeller

No. Used/Diameter in. [mm] 4/24 [609.6] 4/24 [609.6] 4/24 [609.6] 4/24 [609.6]
Drive Type/No. Speeds Direct/1 Direct/1 Direct/1 Direct/1
CFM [L/s] 16000 [7550] 16000 [7550] 16000 [7550] 16000 [7550]
No. Motors/HP 4 at 1/3 HP 4 at 1/3 HP 4 at 1/3 HP 4 at 1/3 HP
Motor RPM 1075 1075 1075 1075

Indoor Fan—Type FC Centrifugal FC Centrifugal FC Centrifugal FC Centrifugal

No. Used/Diameter in. [mm] 2/15x15 [381x381] 2/15x15 [381x381] 2/15x15 [381x381] 2/15x15 [381x381]
Drive Type/No. Speeds Belt/Variable Belt/Variable Belt/Variable Belt/Variable
No. Motors 1 1 1 1
Motor HP 3 5 5 7.5
Motor RPM 1725 1725 1725 1725
Motor Frame Size 56 184 184 0

Filter—Type Disposable Disposable Disposable Disposable

Furnished Yes Ye s Yes Yes
(No.) Size Recommended in. [mm] (3)2x18x18 [51x457x457] (3)2x18x18 [51x457x457] (3)2x18x18 [51x457x457] (3)2x18x18 [51x457x457]

Refrigerant Charge Oz. (Sys. 1/Sys. 2) [g] 82/72 [2325/2041] 82/72 [2325/2041] 117/107 [3317/3033] 117/107 [3317/3033]
Weights

Ship Weight lbs. [kg] 1897 [860] 1927 [874] 2063 [936] 2084 [945]

9.7/NA

(3)2x18x24 [51x457x610] (3)2x18x24 [51x457x610] (3)2x18x24 [51x457x610] (3)2x18x24 [51x457x610]

CONTINUED

[ ] Designates Metric Conversions

General Data

NOM. SIZES 15 & 20 TONS [52.8-70.3 kW] ASHRAE 90.1-2004 COMPLIANT MODELS

IM 867

9

NOTES:

1. Cooling Performance is rated at 95° F ambient, 80° F entering dry bulb, 67° F entering wet bulb. Gross capacity does
not include the effect of fan motor heat. ARI capacity is net and includes the effect of fan motor heat. Units are suitable
for operation to 20% of nominal cfm. Units are certified in accordance with the Unitary Air Conditioner Equipment
certification program, which is based on ARI Standard 210/240 or 360.

2. EER and/or SEER are rated at ARI conditions a

nd in accordance with DOE test procedures.

3. Integrated Part Load Value is rated in accordance with ARI Standard 210/240 or 360. Units are rated at 80° F ambient,
80° F entering dry bulb, and 67° F entering wet bulb at ARI rated cfm.

4. Outdoor Sound Rating shown is tested in accordance with ARI Standard 270.

[ ] Designates Metric Conversions

General Data

NOM. SIZES 15 & 20 TONS [52.8-70.3 kW] ASHRAE 90.1-2004 COMPLIANT MODELS

McQuay MPS Series 020AYDL 020AYDM 020AYYL 020AYYM
Cooling Performance

Gross Cooling Capacity Btu [kW] 246,000 [72.08] 246,000 [72.08] 246,000 [72.08] 246,000 [72.08]
EER/SEER
Nominal CFM/ARI Rated CFM [L/s] 8000/7400 [3775/3492] 8000/7400 [3775/3492] 8000/7400 [3775/3492] 8000/7400 [3775/3492]
ARI Net Cooling Capacity Btu [kW] 232,000 [67.98] 232,000 [67.98] 232,000 [67.98] 232,000 [67.98]
Net Sensible Capacity Btu [kW] 168,000 [49.22] 168,000 [49.22] 168,000 [49.22] 168,000 [49.22]
Net Latent Capacity Btu [kW] 64,000 [18.75] 64,000 [18.75] 64,000 [18.75] 64,000 [18.75]
Integrated Part Load Value
Net System Power kW 23.92 23.92 23.92 23.92

Compressor

No./Type 4/Scroll 4/Scroll 4/Scroll 4/Scroll

Outdoor Sound Rating (dB)
Outdoor Coil—Fin Type Louvered Louvered Louvered Louvered

Tube Type Rifled Rifled Rifled Rifled
Tube Size in. [mm] OD 0.375 [9.5] 0.375 [9.5] 0.375 [9.5] 0.375 [9.5]
Face Area sq. ft. [sq. m] 36 [3.34] 36 [3.34] 36 [3.34] 36 [3.34]
Rows / FPI [FPcm] 2 / 22 [9] 2 / 22 [9] 2 / 22 [9] 2 / 22 [9]

Indoor Coil—Fin Type Louvered Louvered Louvered Louvered

Tube Type Rifled Rifled Rifled Rifled
Tube Size in. [mm] 0.375 [9.5] 0.375 [9.5] 0.375 [9.5] 0.375 [9.5]
Face Area sq. ft. [sq. m] 15.75 [1.46] 15.75 [1.46] 15.75 [1.46] 15.75 [1.46]
Rows / FPI [FPcm] 4 / 13 [5] 4 / 13 [5] 4 / 13 [5] 4 / 13 [5]
Refrigerant Control Capillary Tubes Capillary Tubes Capillary Tubes Capillary Tubes
Drain Connection No./Size in. [mm] 1/1 [25.4] 1/1 [25.4] 1/1 [25.4] 1/1 [25.4]

Outdoor Fan—Type Propeller Propeller Propeller Propeller

No. Used/Diameter in. [mm] 4/24 [609.6] 4/24 [609.6] 4/24 [609.6] 4/24 [609.6]
Drive Type/No. Speeds Direct/1 Direct/1 Direct/1 Direct/1
CFM [L/s] 16000 [7550] 16000 [7550] 16000 [7550] 16000 [7550]
No. Motors/HP 4 at 1/3 HP 4 at 1/3 HP 4 at 1/3 HP 4 at 1/3 HP
Motor RPM 1075 1075 1075 1075

Indoor Fan—Type FC Centrifugal FC Centrifugal FC Centrifugal FC Centrifugal

No. Used/Diameter in. [mm] 2/15x15 [381x381] 2/15x15 [381x381] 2/15x15 [381x381] 2/15x15 [381x381]
Drive Type/No. Speeds Belt/Variable Belt/Variable Belt/Variable Belt/Variable
No. Motors 1 1 1 1
Motor HP 5 7.5 5 7.5
Motor RPM 1725 1725 1725 1725
Motor Frame Size 184 0 184 0

Filter—Type Disposable Disposable Disposable Disposable

Furnished Yes Ye s Yes Yes
(No.) Size Recommended in. [mm] (3)2x18x18 [51x457x457] (3)2x18x18 [51x457x457] (3)2x18x18 [51x457x457] (3)2x18x18 [51x457x457]

Refrigerant Charge Oz. (Sys. 1/Sys. 2) [g] 117/107 [3317/3033] 117/107 [3317/3033] 117/107 [3317/3033] 117/107 [3317/3033]
Weights

Net Weight lbs. [kg] 1843 [836] 1864 [846] 1843 [836] 1864 [846]
Ship Weight lbs. [kg] 2063 [936] 2084 [945] 2063 [936] 2084 [945]

1

2

3

4

9.7/NA 9.7/NA 9.7/NA

9.9 9.9 9.9 9.9

91 91 91 91

(3)2x18x24 [51x457x610] (3)2x18x24 [51x457x610] (3)2x18x24 [51x457x610] (3)2x18x24 [51x457x610]

9.7/NA

10 IM 867

ELECTRICAL DATA

ELECTRICAL DATA

Minimum Circuit Ampacity 74/74

Unit Information

Unit Operating
Voltage Range

187-253

Minimum Overcurrent
Protection Device Size

80/80

Maximum Overcurrent
Protection Device Size

80/80

Compressor Motor

No. 4

Volts 200/240

Phase 3

HP 3 1/3

RPM 3450
Amps (RLA) 12.4/12.4
Amps (LRA) 88/88

Condenser Motor

No. 4

Volts 208/230

Phase 1

HP 1/3
Amps (FLA) 9.6
Amps (LRA) 4.7

Evaporator Fan

No. 1

Volts 208/230

Phase 3

HP 3
Amps (FLA) 11.5
Amps (LRA) 74.5 82.6

14.7

5

3

208/230

1

4.7

9.6

1/3

1

208/230

4

88/88

12.4/12.4

3450

3 1/3

3

200/240

4

90/90

90/90

78/78

187-253

38.1

7

3

3

460

1

2.4

8

1/3

1

460

4

44

6.4

3450

3 1/2

3

460

4

45

45

43

414-506

41.3

10

5

3

460

1

2.4

8

1/3

1

460

4

44

6.4

3450

3 1/2

3

460

4

50

50

47

414-506

20

8

3

3

575

1

1.5

4

1/3

1

575

4

34

5

3450

3 1/2

3

575

4

40

40

34

518-632

33

8

5

3

575

1

1.5

4

1/3

1

575

4

34

5

3450

3 1/2

3

575

4

40

40

34

518-632

015AYCL 015AYCM 015AYDL 015AYDM 015AYYL 015AYYM

1. Horsepower Per Compressor.

2. Amp Draw Per Motor. Multiply Value By Number of Motors to Determine Total Amps.

Table A1

ELECTRICAL DATA

Minimum Circuit Ampacity 99/99

Unit Information

Unit Operating
Voltage Range

187-253

Minimum Overcurrent
Protection Device Size

110/110

Maximum Overcurrent
Protection Device Size

110/110

Compressor Motor

No. 4

Volts 200/240

Phase 3

HP 3 1/3

RPM 3450
Amps (RLA) 17.5/17.5
Amps (LRA) 123/123

Condenser Motor

No. 4

Volts 208/230

Phase 1

HP 1/3
Amps (FLA) 9.6
Amps (LRA) 4.7

Evaporator Fan

No. 1

Volts 208/230

Phase 3

HP 5
Amps (FLA) 14.7
Amps (LRA) 82.6 136

22.3

7.5

3

208/230

1

4.7

9.6

1/3

1

208/230

4

123/123

17.5/17.5

3450

3 1/3

3

200/240

4

125/125

100/100

108/108

187-253

41.3

10

5

3

460

1

2.4

8

1/3

1

460

4

62

9

3450

3 1/2

3

460

4

60

60

57

414-506

68

11.2

7.5

3

460

1

2.4

8

1/3

1

460

4

62

9

3450

3 1/2

3

460

4

60

60

58

414-506

33

8

5

3

575

1

1.5

4

1/3

1

575

4

50

7.1

3450

4

3

575

4

50

50

43

518-632

53.8

8.8

7.5

3

575

1

1.5

4

1/3

1

575

4

50

7.1

3450

4

3

575

4

50

50

44

518-632

020AYCL 020AYCM 020AYDL 020AYDM 020AYYL 020AYYM

1. Horsepower Per Compressor.

2. Amp Draw Per Motor. Multiply Value By Number of Motors to Determine Total Amps.

Table A2

IM 867

11

Installation

General

1 PRE-INSTALLATION CHECK-POINTS

Before attempting any installation, the following points
should be carefully considered:

a Structural strength of supporting members.

(rooftop installation)

b Clearances and provision for servicing.

c Power supply and wiring.

d Air duct connections.

e Drain facilities and connections.

f Location for minimum noise.

2 LOCATION

These units are designed for outdoor installations. They
can be mounted on a slab or rooftop. They are not to be
installed within any part of a structure such as an attic,
crawl space, closet, or any other place where condenser
air flow is restricted or other than outdoor ambient condi­tions prevail. Since the application of the units is of the
outdoor type, it is important to consult your local code
authorities at the time the first installation is made.

Outside Slab Installation

(Typical outdoor slab installations are shown in Figures 9 and

10.)

1 Select a location where external water drainage cannot

collect around the unit.

2 Provide a level concrete slab extending 3" beyond all

four sides of the unit. The slab should be sufficient above
grade to prevent ground water from entering the unit.

IMPORTANT: To prevent transmission of noise or vibration,

slab should not be connected to building structure.

3 The location of the unit should be such as to provide

proper access for inspection and servicing.

4 Locate unit where operating sounds will not disturb

owner or neighbors.

5 Locate unit so roof runoff water does not pour directly on

the unit. Provide gutter or other shielding at roof level.
Do not locate unit in an area where excessive snow drift­ing may occur or accumulate.

Clearances

The following minimum clearances must be observed for
proper unit performance and serviceability.

1 Provide 48" minimum clearance at the front of the unit.

Provide 18" minimum clearance at all other sides of the
unit.

2 Provide 60" minimum clearance between top of unit and

maximum 3 foot overhang.

3 Unit is design certified for application on combustible

flooring with 0" minimum clearance.

4 See Figure 9 for illustration of minimum installation-

service clearances.

Rooftop Installation

1 Before locating the unit on the roof, make sure that the

strength of the roof and beams is adequate at that point to
support the weight involved. This is very important and
user’s responsibility.

Figure 9: Outside Slab Installation, Basement or Crawl
Space Distribution System

A0886-22

A0886-23

Figure 10: Outside Slab Installation, Closet Distribution
System. Slab Floor Construction

12 IM 867

2 For rigging and roofcurb details, see Figures 11 and 12.

Use field-furnished spreaders.

3 For roofcurb assembly, see Roofcurb Installation Instruc-

tions.

4 If the roofcurb is not used, provisions for disposing of

condensate water runoff must be provided.

5 The unit should be placed on a solid and level roofcurb

or platform of adequate strength. See Figure 13.

6 The location of the unit on the roof should be such as to

provide proper access for inspection and servicing.

IMPORTANT: If unit will not be put into service immediately,
cover supply and return openings to prevent excessive conden­sation.

Figure 11: Rigging for Liftiing

A0888-02

A0888-02

Figure 12: Roofcurb Installation

ST-A0886-12

CENTER OF

GRAVITY

CENTER OF

GRAVITY

32.9ⴖ

835.6 mm

67.1ⴖ

1704.3 mm

IM 867

13

Ductwork

Ductwork should be fabricated by the installing contractor in
accordance with local codes and NFPA90A. Industry manuals
may be used as a guide when sizing and designing the duct
system - contact Air Conditioning Contractors of America,
1513 16th St. N.W., Washington, D.C. 20036.

The unit should be placed as close to the space to be air con­ditioned as possible allowing clearance dimensions as indicat­ed. Ducts should be run as directly as possible to supply and
return outlets. Use of non-flammable waterproof flexible con­nectors on both supply and return connections at the unit to
reduce noise transmission is recommended.
It is preferable to install the unit on the roof of the structure if
the registers or diffusers are located on the wall or in the ceil­ing. A slab installation could be considered when the registers
are low on a wall or in the floor.

On ductwork exposed to outside air conditions of temperature
and humidity, use a minimum of 2" of insulation and a vapor
barrier. Distribution system in attic, furred space or crawl
space should be insulated with at least 2" of insulation with
vapor barrier. One-half to 1" thickness of insulation is usually
sufficient for ductwork inside the air conditioned space.

Balancing dampers should be provided for each branch duct
in the supply system. Ductwork should be properly supported
from the structure.

When installing ductwork, consider the following items:

1 Noncombustible flexible connectors should be used

between ductwork and unit to reduce noise and vibration
transmission into the ductwork.

2 When auxiliary heaters are installed, use noncombustible

flexible connectors and clearance to combustible material
of 0" for the first 3 feet of discharge duct. Clearance to
unit top and side is 0".

Filters

This unit is provided with 3 - 18" x 18" x 2" and 3 - 18" x 24"
x 2" disposable filters. When replacing filters, ensure they are
inserted fully to the back to prevent bypass. See Figure 8.

Recommended supplier of this filter is:

AAF International
Part #: 54-42541-01 (18” x 18” x 2”)

Part #: 54-42541-03 (18” x 24” x 2”)

Horizontal Conversion
Procedure

Downflow to Horizontal

1 Remove the screws and covers from the outside of the

supply and return sections. Also remove and discard
cover plate. See Figure 3.

2 Install the covers over the bottom supply and return

openings, painted side up, inserting the leading flange
under the bracket provided. Place the back flange to top
of the front bracket provided. See Figure 14.

3 Secure the return and supply cover to front bracket with

two (2) screws.

Condensate Drain

The condensate drain connection of the evaporator is 1" nom­inal male pipe thread. IMPORTANT: Install a condensate trap to

ensure proper condensate drainage. See Figure 15.

Figure 13: Flat rooftop installation, attic or drop ceiling
distribution system. Mounted on roofcurb. Curb must be
level.

Figure 14: Cover Gasket Detail

A0886-24

14 IM 867

Electrical Wiring

Field wiring must comply with the National Electrical Code*
and local ordinances that may apply.

*C.E.C. in Canada

Power Wiring

1 This unit incorporates single-point electrical connections

for the unit and electric heat accessory.

2 It is important that proper electrical power is available to

the unit. Voltage should not vary more than 10% from
the values marked on the unit rating plate. Phase voltages
must be balanced within 3%.

3 For branch circuit wiring (main power supply to unit dis-

connect), the minimum wire size can be determined from
Table B using the circuit ampacity found on the unit
nameplate or from Tables A and G.

4 The branch circuit wire must be sized in accordance with

the National Electrical Code (C.E.C. in Canada) and
local ordinances that may apply using the minimum cir­cuit ampacity found on the unit rating plate.

5 Field-installed power wiring must be run through ground-

ed rain-tight conduit attached to the unit power entry
panel and connected as follows:

Units Without Electric Heat - Connect power wiring to
the power terminal block located on the left side of the
electric heat compartment. Connect the ground wire to
the adjacent ground lug.

Units with Factory Installed Electric Heat - Connect
power wiring to the power terminal block located on the

electric heater kit. Connect the ground wire to the adja­cent ground lug. DO NOT connect aluminum wiring
directly to the electric heater terminal block. Wiring to
the unit contactors is factory-connected.

6 For field installation of an electric heater kit, follow the

instructions below. Refer to the information supplied
with the kit.

a Removing screws as required, open heater access door

and detach adjacent power entry panel.

b Remove unit contactor wires (1L1, 1L2, 1L3) from

unit terminal block on the left side of the electric heat
compartment. Remove and discard the terminal block
and the adjacent ground lug.

c Remove the heater kit block-off panel and install the

heater kit in its place using the screws previously
removed.

d Connect the unit contactor wires (1L1, 1L2, 1L3) to

the compressor fuse block on the heater kit.

e Re-install the power entry panel & run conduit and the

proper size field wiring through the opening in the
panel.

f Connect field wiring to the power terminal block

located on the electric heater kit. Connect ground wire
to the adjacent ground lug.

g Connect heater kit control plug to the receptacle on the

control wiring harness.

h Close heater access door and secure with screws previ-

ously removed.

Control Wiring (Class II)

1 Low voltage wiring should not be run in conduit with

power wiring.

2 Control wiring is routed through the 7/8" hole in the

unit side panel. See Figure 7. Use a minimum #18
AWG thermostat wire. For wire lengths exceeding 50',
use #16 AWG thermostat wire. Connect the control
wiring to the low voltage terminal block located below
the unit control box.

3 It is necessary that only approved thermostats be used.

Please contact your McQuay Representative.

4 Figure 18 shows representative low voltage connection

diagrams. Read your thermostat installation instructions
for any special requirements for your specific thermo­stat.

Figure 15: Condensate Drain

TABLE B: COPPER WIRE SIZE — AWG (1% VOLTAGE DROP)

300
250
200
150
100

50

Supply

Wire

Length

Feet

4
4
6

8

10
14

15

3

4
4
6

8

12

20

2

3

4
6

8

10

25

2

3

4
4
6

10

30

1
2

3

4
6

8

35

1/0

1
2
4
6

8

40

1/0

1
2

3

4
6

45

2/0
1/0

1

3

4
6

50

2/0
1/0

1
2
4
6

55

3/0
2/0
1/0

2

3

4

60

3/0
2/0
1/0

1

3

4

65

3/0
2/0
1/0

1
2
4

70

4/0
3/0
2/0
1/0

2

3

75

4/0
3/0
2/0
1/0

2

3

80

4/0
3/0
2/0
1/0

1

3

85

4/0
4/0
3/0
1/0

1
2

90

250
4/0
3/0
2/0

1
2

95

250
4/0
3/0
2/0

1
2

100

250

4/0
3/0
2/0

1
2

105

250

4/0
3/0
2/0
1/0

2

110

300
250

4/0
2/0
1/0

1

115

300
250

4/0
3/0
1/0

1

120

300
250

4/0
3/0
1/0

1

125

Circuit Ampacity

NOTE:

1. Wire size based on 60ºC type copper conductors below 100 ampacity. 2. Wire size based on 75ºC type copper conductors for 100 ampacity and above.

IM 867

15

NOTE: Units installed in Canada require that an outdoor
thermostat (30,000 min. cycles of endurance) be installed
and be wired with C.E.C. Class I wiring.

Internal Wiring

1 A diagram of the internal wiring of this unit is located on

the inside of the electrical access panel. If any of the
original wire, as supplied with the unit must be replaced,
the wire gauge and insulation must be the same as origi­nal wiring.

208 Volt Applications

Transformer is factory-wired for 220 volts on 200/220 volt
models and must be changed for 200-volt applications. See
unit wiring diagram for 200-volt wiring.

Grounding

GROUNDING MAY ALSO BE ACCOMPLISHED BY
GROUNDING THE POWER LINE CONDUIT TO THE
UNIT. MAKE SURE THE CONDUIT NUT LOCKING
TEETH HAVE PIERCED THE INSULATING PAINT FILM
OF THE SIDE PANEL.

Thermostat

The thermostat should be mounted on an inside wall about
five feet above the floor in a location where it will not be
affected by unconditioned air, sun, or drafts from open doors
or other sources. The low voltage wiring should be sized as
shown in Table B.

Install the room thermostat in accordance with the instruction
sheet packed in the box with the thermostat.

Indoor Air Flow Data

Belt-drive blower models have motor sheaves set for proper
CFM at a typical external static. See Tables D and E for
blower performance.

The unit must be permanently grounded. A grounding lug is
provided in the electric heat access area for a ground wire.
Failure to ground this unit can result in fire or electrical shock
causing property damage, severe personal injury or death.

▲▲

DANGER

!

Figure 16: Branch Circuit Disconnect Location Table C

FIELD WIRE SIZE FOR 24 VOLT THERMOSTAT CIRCUITS

SOLID COPPER WIRE - AWG.

3.0 16 14 12 10 10 10

2.5 16 14 12 12 12 10

2.0 18 16 14 12 12 10

50 100 150 200 250 300

Length of Run – Feet (1)

Thermostat Load -

Amps

(1) The total wire length is the distance from the furnace to the thermo­stat and back to the furnace.

NOTE: DO NOT USE CONTROL WIRING SMALLER THAN NO. 18
AWG.

A0886-34

Figure 17: Low Voltage Connection Entries

A0886-32

Figure 18: Electric Heat Compartment

16 IM 867

E.S.P. - Inches of Water

15 TON PACKAGE UNIT - 60 Hz

———

—

637

653

669

685

701

717

733

749

765

———

—

1494

1738

1981

2224

2468

2711

2955

3198

3442

TABLE D: AIR-FLOW PERFORMANCE – 15 TON MODELS

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3

1.4

1.5 1.6 1.7 1.8 1.9 2.0

STD

CFM

RPM RPM

WATTS WATTS

RPM

WATTS

RPM RPM

WATTS WATTS

RPM

WATTS

RPM

WATTS

RPM RPM

WATTS WATTS

RPM

WATTS

RPM

WATTS

RPM

WATTS

RPM

WATTS

RPM

WATTS

RPM RPM

WATTS WATTS

RPM RPM RPM RPM

WATTS WATTS WATTS WATTS

4800

5000

5200

5400

5600

5800

6000

6200

6400

6600

6800

7000

7200

———

640

656

672

688

704

720

736

752

768

784

———

1394

1638

1881

2125

2368

2611

2855

3098

3342

3585

—

—

644

660

676

692

708

724

740

756

772

788

804

—

—

1294

1538

1781

2025

2268

2512

2755

2998

3242

3485

3729

631

647

663

679

695

711

727

743

759

775

791

807

877

951

1194

1438

1681

1925

2168

2412

2655

2899

3142

3385

3629

3821

650

666

682

698

714

731

747

763

779

795

811

881

890

1095

1338

1581

1825

2068

2312

2555

2799

3042

3286

3529

3695

4000

670

686

702

718

734

750

766

782

798

814

885

894

903

1238

1482

1725

1968

2212

2455

2699

2942

3186

3429

3569

3874

4179

689

705

721

737

753

769

785

801

817

889

898

907

916

1382

1625

1869

2112

2355

2599

2842

3086

3329

3442

3748

4053

4358

709

725

741

757

773

789

805

821

893

920

911

902

929

1525

1769

2012

2256

2499

2742

2986

3229

3316

3622

3927

4232

4538

728

744

760

776

792

808

888

897

906

915

924

933

942

1669

1912

2156

2399

2643

2886

2885

3190

3495

3801

4106

4411

4717

747

764

780

796

812

892

901

910

919

928

9

37

946

955

1812

2056

2299

2543

2786

2759

3064

3369

3675

3980

4285

4591

4896

767

783

799

815

896

905

914

923

932

941

950

959

968

1956

2199

2443

2686

2632

2938

3243

3548

3854

4159

4464

4770

5075

786

802

818

900

909

918

927

936

945

954

963

972

—

2100

2343

2586

2506

2812

3117

3422

3727

4033

4338

4643

4949

—

806

822

904

913

922

931

940

949

958

967

9

76

—

—

2243

2487

2380

2685

2991

3296

3601

3907

4212

4517

4823

—

—

899

908

917

926

935

944

953

962

971

980

989

—

—

1949

2254

2559

2864

3170

3475

3780

4086

4391

4696

5002

—

—

912

921

929

936

947

956

965

974

983

992

———

2128

2433

2738

3044

3349

3654

3960

4265

4570

4876

———

924

933

942

951

960

969

978

987

996

1005

———

2307

2612

2917

3223

3528

3833

4139

4444

4749

5055

———

937

946

955

964

973

982

991

1000

1009

———

—

950

959

968

977

986

995

1004

1013

—————

963

972

981

990

999

1008

1017

—————

—

976

985

994

1003

1012

1021

———————

2486

2791

3097

3402

3707

4012

4318

4623

4928

———

—

2665

2970

3276

3581

3886

4192

4497

4802

—————

2844

3149

3455

3760

4065

4371

4876

—————

—

3023

3329

3634

3939

4245

4550

———————

DRIVE PACKAGE L

3.0
BK-90

1VP-44

123 456

823 787

750

710 670 629

MOTOR HP

BLOWER SHEAVE

MOTOR SHEAVE

TURNS OPEN

RPM

NOTES: 1. Factory sheave settings shown in bold type.

2. Do not set sheave below minimum turns open shown.

3. Re-adjustment of sheave required to achieve rated airflow at ARI minimum E.S.P.

4. Drive data shown is for horizontal airflow with dry coil. Add component resistance

to duct resistance to determine total E.S.P.

DRIVE PACKAGE M

5

BK-72

1VP-44

1.5 2 3

4

56

1022 1017 1006 933 860 786

MOTOR HP

BLOWER SHEAVE

MOTOR SHEAVE

TURNS OPEN

RPM

COMPONENT RESISTANCE TABLE

CFM WET COIL DOWNFLOW

4800 0.020 0.010

5200 0.040 0.020

5600 0.060 0.030

6000 0.080 0.040

6400 0.100 0.050

6800 0.125 0.060

7200 0.150 0.070

IM 867

17

TABLE E: AIR-FLOW DATA 20 TON MODELS

701

717

733

749

765

781

797

813

829

845

861

877

911

920

929

938

947

2468

2711

2955

3198

3442

3685

3929

4172

4415

4659

4902

5146

5726

6032

6337

6642

6948

E.S.P. - Inches of Water

20 TON PACKAGE UNIT - 60 Hz

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3

1.4

1.5 1.6 1.7 1.8 1.9 2.0

STD

CFM

RPM RPM

WATTS WATTS

RPM

WATTS

RPM RPM

WATTS WATTS

RPM

WATTS

RPM

WATTS

RPM RPM

WATTS WATTS

RPM

WATTS

RPM

WATTS

RPM

WATTS

RPM

WATTS

RPM

WATTS

RPM RPM

WATTS WATTS

RPM RPM RPM RPM

WATTS WATTS WATTS WATTS

6400

6600

6800

7000

7200

7400

7600

7800

8000

8200

8400

8600

8800

9000

9200

9400

9600

720

736

752

768

784

801

817

833

849

865

881

915

924

933

942

951

960

2611

2855

3098

3342

3585

3829

4072

4316

4559

4802

5046

5600

5905

6211

6516

6821

7127

740

756

772

788

804

820

836

852

868

910

919

928

936

945

954

963

972

2755

2998

3242

3485

3729

3972

4216

4459

4703

5169

5474

5779

6084

6390

6695

7000

7306

759

775

791

807

823

839

855

871

913

922

931

940

949

958

967

976

9

85

2899

3142

3385

3629

3872

4116

4359

4603

5042

5348

5653

5958

6264

6569

6874

7180

—

779

795

811

827

843

859

875

917

926

935

944

953

962

971

980

989

—

3042

3286

3529

3772

4016

4259

4503

4916

5221

5527

5832

6137

6443

6748

7053

7359

—

798

814

830

846

862

878

921

930

939

948

957

966

975

984

993

—

—

3186

3429

3673

3916

4160

4403

4790

5095

5401

5706

6011

6317

6622

6927

7233

—

—

817

834

850

866

882

925

934

943

952

961

970

979

988

997

1006

—

—

3329

3573

3816

4060

4303

4664

4696

5274

5580

5885

6190

6496

6801

7106

7412

—

—

837

853

869

920

929

938

947

956

965

974

983

992

1001

1010

———

3473

3716

3960

4232

4538

4843

5148

5454

5759

6064

6369

6675

6980

7285

———

856

872

924

933

942

951

960

969

978

987

996

1005

1014

———

—

3616

3860

4106

4411

4717

5022

5327

5633

5938

6243

6549

6854

7159

———

—

876

928

937

946

955

964

973

982

991

1000

1009

1018

1027

———

—

3760

3980

4285

4591

4896

5201

5506

5812

6117

6422

6728

7033

7338

———

—

932

941

950

959

968

977

986

995

1004

1013

1022

1031

—————

3854

4159

4464

4770

5075

5380

5686

5991

6296

6602

6907

7212

—————

945

954

963

972

981

990

999

1008

1017

1026

1035

1044

—————

4033

4338

4643

4949

5254

5559

5865

6170

6475

6781

7086

7391

—————

958

967

976

985

994

1003

1012

1021

1030

1039

1048

—————

—

4212

4517

4823

5128

5433

5739

6044

6349

6655

6960

7265

—————

—

971

980

989

998

1007

1015

1024

1033

1042

1051

———————

4391

4696

5002

5307

5612

5918

6223

6528

6834

7139

———————

983

992

1001

1010

1019

1028

1037

1046

1055

1064

———————

4570

4876

5181

5486

5791

6097

6402

6707

7013

7318

———————

996

1005

1014

1023

1032

1041

1050

1059

1068

———————

—

4749

5055

5360

5665

5971

6276

6581

6887

7192

———————

—

1009

1018

1027

1036

1045

1054

1063

1072

1081

———————

—

1022

1031

1040

1049

1058

1067

1076

1085

—————————

1035

1044

1053

1062

1071

1080

1089

1098

—————————

1048

1057

1066

1075

1084

1093

1102

—————————

—

4928

5234

5539

5844

6150

6455

6760

7066

7371

———————

—

5108

5413

5718

6024

6329

6634

6940

7245

—

———————

—

5287

5592

5897

6203

6508

6813

7119

7424

—————————

5466

5771

6076

6382

6687

6992

7298

—————————

—

DRIVE PACKAGE L

5.0
BK-95

1VP-50

1

2 3 456

882

846 810 773 736 700

MOTOR HP

BLOWER SHEAVE

MOTOR SHEAVE

TURNS OPEN

RPM

NOTES: 1. Factory sheave settings shown in bold type.

2. Do not set sheave below minimum turns open shown.

3. Re-adjustment of sheave required to achieve rated airflow at ARI minimum E.S.P.

4. Drive data shown is for horizontal airflow with dry coil. Add component resistance

to duct resistance to determine total E.S.P.

DRIVE PACKAGE M

7.5
BK-90

1VP-60

123

4

56

1102 1075 1047 1006 964 922

MOTOR HP

BLOWER SHEAVE

MOTOR SHEAVE

TURNS OPEN

RPM

COMPONENT RESISTANCE TABLE

CFM WET COIL DOWNFLOW

6400 0.100 0.030

6800 0.125 0.043

7200 0.150 0.055

7600 0.175 0.068

8000 0.200 0.080

8400 0.225 0.093

8800 0.250 0.105

9200 0.275 0.118

9600 0.300 0.130

18 IM 867

Pre-Start Check

1 Is unit properly located and slightly slanted toward

indoor condensate drain?

2 Is ductwork insulated, weatherproofed, with proper spac-

ing to combustible materials?

3 Is air free to travel to and from outdoor coil? (See Figure

5.)

4 Is the wiring correct, tight, and according to unit wiring

diagram?

5 Is unit grounded?

6 Are field supplied air filters in place and clean?

7 Do the outdoor fan and indoor blower turn freely without

rubbing, and are they tight on the motor shafts?

Startup

1 Turn thermostat to “OFF,” turn “on” power supply at dis-

connect switch.

2 Turn temperature setting as high as it will go.

3 Turn fan switch to “ON.”

4 Indoor blower should run. Be sure it is running in the

right direction.

5 Turn fan switch to “AUTO.” Turn system switch to

“COOL” and turn temperature setting below room tem­perature. Unit should run in cooling mode.

6 Is outdoor fan operating correctly in the right direction?

7 Is compressor running correctly.

Record the following after the unit has run some time.

a Operating Mode

b Discharge Pressures (High) _________________PSIG
c Vapor Pressure at Compressors (Low)_________PSIG
d Vapor Line Temperature at Compressors ________°F.
e Indoor Dry Bulb ____________________________°F.
f Indoor Wet Bulb____________________________°F.
g Outdoor Dry Bulb___________________________°F.
h Outdoor Wet Bulb __________________________°F.
i Voltage at Contactor_______________________Volts
j Current at Contactors______________________Amps
k Model Number _______________________________
l Serial Number ________________________________
mLocation_____________________________________
n Owner ______________________________________
o Date ________________________________________

8 Turn thermostat system switch to “HEAT.” Unit com-

pressors should stop. Raise temperature setting to above
room temperature. Unit should run in heating mode and
auxiliary heaters, if installed, should come on.

9 Check the refrigerant charge using the instructions locat-

ed on unit charging chart. Replace service port caps.
Service port cores are for system access only and will
leak if not tightly capped.

10 Adjust discharge air grilles and balance system.

11 Check ducts for condensation and air leaks.

12 Check unit for tubing and sheet metal rattles.

13 Instruct the owner on operation and maintenance.

14 Leave “INSTALLATION” and ”USE AND CARE“

instructions with owner

A0823-01

Figure 19

IM 867

19

Operation

Cooling Mode

With thermostat in the cool mode, fan auto and the room tem­perature higher than the thermostat setting:

1 Indoor blower contactor is energized through thermostat

contact (G).

2 Compressor contactors are energized through thermostat

contacts (Y1) & (Y2) and high pressure controls.

3 Economizer enthalpy control (if installed) controls opera-

tion of first-stage cooling and positions fresh air damper
to maintain mixed air temperature. Second-stage cooling
operates normally as required by second stage of thermo­stats.

4 The system will continue in cooling operation as long as

all safety controls are closed, until the thermostat is satis­fied.

Heating Mode

With thermostat in the heat mode, fan auto and the room tem­perature lower than the thermostat setting the indoor blower
contactor is energized through thermostat contact (G).

Auxiliary Heat

In the heating mode, the thermostat will energize one or more
supplementary resistance heaters.

Replacement Parts

To find your local McQuay Certified Parts Distributor, go to
www.mcquay.com and select Parts Locator.

Charge Information

Refer to the appropriate charge chart on the unit, or in this
manual.

Troubleshooting

Refer to the troubleshooting chart included in this manual.

Wiring Diagrams

Refer to the appropriate wiring diagram included in this man­ual.

Only electric heater kits supplied by this manufacturer as
described in this publication have been designed, tested,
and evaluated by a nationally recognized safety testing
agency for use with this unit. Use of any other manufactured
electric heaters installed within this unit may cause haz­ardous conditions resulting in property damage, fire, bodily
injury or death.

▲▲

DANGER

!

20 IM 867

Heater Kit Characteristics

Table F: Auxiliary Heater Kits Characteristics and Application (15 & 20 Ton Models)

MAX. FUSE

UNIT OR CKT. BKR.

MODEL HEATER KIT HEATER KIT UNIT MIN. CKT. SIZE (CKT. BKR.

NUMBER MODEL NO. HEATER KW FLA AMPACITY MUST BE

HACR TYPE

FOR USA)

NONE* — — 74/74 80/80
CD20C 14.4/19.2 40.0/46.2 74/74 80/80

015AYCL CD40C 28.8/38.4 79.9/92.4 115/130 125/150

CD60C 43.2/57.6 119.9/138.6 165/188 175/200
CD75C 54.0/72.0 149.9/173.3 202/231 225/250

NONE* — — 43 45
CD20D 19.2 23.1 43 45

015AYDL CD40D 38.4 46.2 67 70

CD60D 57.6 69.3 96 100
CD75D 72.0 86.6 117 125

NONE* — — 34 35
CD20Y 19.2 18.5 34 35

015AYYL CD40Y 38.4 37.0 57 60

CD60Y 57.6 55.4 80 80
CD75Y 72.0 69.3 97 100

NONE* — — 77/77 80/80
CD20C 14.4/19.2 40.0/46.2 77/77 80/80

015AYCM CD40C 28.8/38.4 79.9/92.4 119/134 125/150

CD60C 43.2/57.6 119.9/138.6 169/192 175/200
CD75C 54.0/72.0 149.9/173.2 206/235 225/250

NONE* — — 46 50
CD20D 19.2 23.1 46 50

015AYDM CD40D 38.4 46.2 71 80

CD60D 57.6 69.3 100 100
CD75D 72.0 86.6 121 125

NONE* — — 34 35
CD20Y 19.2 18.5 34 35

015AYYM CD40Y 38.4 37.0 57 60

CD60Y 57.6 55.4 80 80
CD75Y 72.0 69.3 97 100

NONE* — — 100/100 110/110
CD20C 14.4/19.2 40.0/46.2 100/100 110/110

020AYCL CD40C 28.8/38.4 79.9/92.4 119/134 125/150

CD60C 43.2/57.6 119.9/138.6 169/192 175/200
CD75C 54.0/72.0 149.9/173.2 206/235 225/250

NONE* — — 58 60
CD20D 19.2 23.1 58 60

020AYDL CD40D 38.4 46.2 71 80

CD60D 57.6 69.3 100 100
CD75D 72.0 86.6 121 125

NONE* — — 45 50
CD20Y 19.2 18.5 45 50

020AYYL CD40Y 38.4 37.0 57 60

CD60Y 57.6 55.4 8

0 80

CD75Y 72.0 69.3 97 100
NONE* — — 108/108 125/125

CD20C 14.4/19.2 40.0/46.2 108/108 125/125

020AYCM CD40C 28.8/38.4 79.9/92.4 128/144 150/150

CD60C 43.2/57.6 119.9/138.6 178/202 200/225
CD75C 54.0/72.0 149.9/173.2 216/245 225/250

NONE* — — 59 60
CD20D 19.2 23.1 59 60

020AYDM CD40D 38.4 46.2 72 80

CD60D 57.6 69.3 101 110
CD75D 72.0 86.6 123 125

NONE* — — 46 50
CD20Y 19.2 18.5 46 50

020AYYM CD40Y 38.4 37.0 58 60

CE60Y 57.6 55.4 8190
CD75Y 72.0 69.3 98 100

IM 867

21

SYMPTOM POSSIBLE CAUSE REMEDY

Unit will not run • Power off or loose electrical connection • Check for correct voltage at compressor contactor in control

box

• Thermostat out of calibration-set too high • Reset

• Defective contactor • Check for 24 volts at contactor coil - replace if contacts are
open

• Blown fuses • Replace fuses

• Transformer defective • Check wiring-replace transformer

• High pressure control open (if provided) • Reset-also see high head pressure remedy-

• Interconnecting low voltage wiring damaged • Replace thermostat wiring

Condenser fan runs, compressor • Run capacitor defective (single phase only) • Replace

doesn’t • Loose connection • Check for correct voltage at compressor -

check & tighten all connections

• Compressor stuck, grounded or open motor winding • Wait at least 2 hours for overload to reset.

open internal overload. If still open, replace the compressor.

• Low voltage condition At compressor terminals, voltage must be within 10% of rating
plate volts when unit is operating.

Insufficient cooling • Improperly sized unit • Recalculate load

• Improper airflow • Check - should be approximately 400 CFM per ton.

• Incorrect refrigerant charge • Charge per procedure attached to unit service panel.

• Air, non-condensibles or moisture in system • Recover refrigerant, evacuate & recharge, add filter drier

• Incorrect voltage • At compressor terminals, voltage must be within 10% of rating
plate volts when unit is operating.

Compressor short cycles • Incorrect voltage • At compressor terminals, voltage must be ± 10% of

nameplate marking when unit is operating.

• Defective overload protector • Replace - check for correct voltage

• Refrigerant undercharge • Add refrigerant

Registers sweat • Low evaporator airflow • Increase speed of blower or reduce restriction - replace air

filter

High head-low vapor pressures • Restriction in liquid line, expansion device or filter drier • Remove or replace defective component

• Flow check piston size too small • Change to correct size piston

• Incorrect capillary tubes • Change coil assembly

High head-high or normal vapor • Dirty condenser coil • Clean coil

pressure - Cooling mode • Refrigerant overcharge • Correct system charge

• Condenser fan not running • Repair or replace

• Air or non-condensibles in system • Recover refrigerant, evacuate & recharge

High head-high or normal vapor • Low air flow - condenser coil • Check filters - correct to speed

pressure - Heating mode • Refrigerant overcharge • Correct system charge

• Air or non-condensibles in system • Recover refrigerant, evacuate & recharge

• Dirty condenser coil • Check filter - clean coil

Low head-high vapor pressures • Defective Compressor valves • Replace compressor

Low vapor - cool compressor - • Low evaporator airflow • Increase speed of blower or reduce restriction - replace air

iced evaporator coil filter

• Operating below 65°F outdoors • Add Low Ambient Kit

• Moisture in system • Recover refrigerant - evacuate & recharge - add filter drier

High vapor pressure • Excessive load • Recheck load calculation

• Defective compressor • Replace

Fluctuating head & vapor • Air or non-condensibles in system • Recover refrigerant, evacuate & recharge

pressures

Gurgle or pulsing noise at • Air or non-condensibles in system • Recover refrigerant, evacuate & recharge

expansion device or liquid line

TROUBLE SHOOTING CHART

Disconnect all power to unit before servicing. Contactor may break only one side. Failure to shut off power can cause electrical
shock resulting in personal injury or death.

▲▲

DANGER

!

22 IM 867

Figure 20: Wiring Diagram for 15 to 20 Tons

IM 867

23

Figure 21: Wiring Schematic for 15 to 20 Tons

24 IM 867

15 TON

IM 867

25

20 TON

26 IM 867

IM 867

27

28 IM 867

McQuay Training and Development

© 2007 McQuay International • www.mcquay.com • 800-432-1342

Now that you have made an investment in modern, efficient McQuay equipment, its care should be a high priority.
For training information on all McQuay HVAC products, please visit us at www.mcquay.com and click on training, or
call 540-248-9646 and ask for the Training Department.

Warranty

All McQuay equipment is sold pursuant to its standard terms and conditions of sale, including Limited Product
Warranty. Consult your local McQuay Representative for warranty details. Refer to Form 933-43285Y. To find your
local McQuay Representative, go to www.mcquay.com.

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.