Part Number: 92-102421-01-00 Maverick I™ Date: March ......ILL I301 Figure 8: Package air conditioner – roofcurb installation 8 IM 864 Ductwork Ductwork should be fabricated by

© 2007 McQuay International

Maverick I™Commercial Packaged Rooftop SystemCooling Only or Heating & CoolingElectric/ElectricModels MPS003AY – 005AY3 to 5 Tons

Installation and Maintenance Manual IM 864

Group: Applied Systems

Part Number: 92-102421-01-00

Date: March 2007

ARI Standard210/240 UAC

™

2 IM 864

Table of ContentsTable of Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Checking Product Received . . . . . . . . . . . . . . . . . . . . 3Equipment Protection . . . . . . . . . . . . . . . . . . . . . . . . . 3Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Pre-Installation Check Points . . . . . . . . . . . . . . . . . . . . . . . . 6

Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Outside Slab Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Rooftop Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Ductwork. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Conversion Procedure . . . . . . . . . . . . . . . . . . . . . . . . 8Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Electrical Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Power Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Control Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Internal Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

208 Volt Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Grounding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Indoor Air Flow Data . . . . . . . . . . . . . . . . . . . . . . . . . 10Crankcase Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Pre-Start Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Auxiliary Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Control System Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Replacement Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . 12Charge Information . . . . . . . . . . . . . . . . . . . . . . . . . . 12Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12General Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-14

Miscellaneous. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Airflow Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-19

Heater Kit Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-24

Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25-27

Charge Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28-30

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

IM 864 3

IntroductionThis manual contains the installation and operating instruc-tions for your packaged rooftop unit. There are a few precau-tions that should be taken to derive maximum satisfactionfrom it. Improper installation can result in unsatisfactory oper-ation or dangerous conditions.Read this manual and any instructions packaged with separateequipment required to make up the system prior to installation.Give this manual to the owner and explain its provisions. Theowner should retain this manual for future reference.

Checking Product ReceivedUpon receiving the unit, inspect it for any damage from ship-ment. Claims for damage, either shipping or concealed, shouldbe filed immediately with the shipping company. Check theunit model number, electrical characteristics, and accessoriesto determine if they are correct.

Equipment Protection From TheEnvironmentThe metal parts of this unit may be subject to rust or deteriora-tion in adverse environmental conditions. This oxidation couldshorten the equipment’s useful life. Salt spray, fog or mist inseacoast areas, sulphur or chlorine from lawn watering sys-tems, and various chemical contaminants from industries suchas paper mills and petroleum refineries are especially corro-sive.If the unit is to be installed in an area where contaminantsare likely to be a problem, special attention should begiven to the equipment location and exposure.

1 Avoid having lawn sprinkler heads spray directly on theunit cabinet.

2 In coastal areas, locate the unit on the side of the buildingaway from the waterfront.

3 Shielding provided by a fence or shrubs may give someprotection.

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

1 Frequent washing of the cabinet, fan blade and coil withfresh water will remove most of the salt or other contami-nants that build up on the unit.

2 Regular cleaning and waxing of the cabinet with a goodautomobile polish will provide some protection.

3 A good liquid cleaner may be used several times a year toremove matter that will not wash off with water.

Several different types of protective coatings are offered insome areas. These coatings may provide some benefit, but theeffectiveness of such coating materials cannot be verified bythe equipment manufacturer.The best protection is frequent cleaning, maintenance andminimal exposure to contaminants.

The manufacturer’s warranty does not cover any damage ordefect to the air conditioner caused by the attachment oruse of any components, accessories or devices (other thanthose authorized by the manufacturer) into, onto or in con-junction with the air conditioner. You should be aware thatthe use of unauthorized components, accessories ordevices may adversely affect the operation of the air condi-tioner and may also endanger life and property. The manu-facturer disclaims any responsibility for such loss or injuryresulting from the use of such unauthorized components,accessories or devices.

▲▲DANGER!

Recognize this symbol as an indication ofImportant Safety Information!!

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

▲▲WARNING!

Disconnect all power to the unit before starting mainte-nance. Failure to do so can result in severe electrical shockor death.

▲▲DANGER!

4 IM 864

Figure 1: Unit Dimensions – Bottom View

Figure 2 : Unit Dimensions

ILL 1316

ILL1305

2

2 2

2

9.56

44.13

4.5 4.5

2.25

72.25

14.44

3.25

RETU

RN

AIR

SUPP

LY

AIR

20

20

13.13

13.13

4.63

ELECTRIC HEAT ACCESS

COMPRESSOR/CONTROL BOX

ACCESS

24.25

18.19

11.13

7.22

46.5

75.5

35

CONTROL ENTRY

5IM 864

Figure 3: Unit Dimensions

Figure 4: Unit Dimensions – Back View

ILL 1304

ILL 1288

SUPPLY COVER

31.22

3.81

76.31

47.09

5.34

24RETURN COVER/OPTIONAL OUTDOORAIR HOOD LOCATION

CONDENSATE DRAIN3/4” NPT FEMALE

BLOWERACCESS

COIL/FILTERACCESS

76.25

12.25 5.5 19.13

6.84

13.72

12.25

35

4.94

19.13

6 IM 864

InstallationGeneral

1 PRE-INSTALLATION CHECK-POINTSBefore attempting any installation, the following pointsshould 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 LOCATIONThese units are designed for outdoor installations. Theycan be mounted on a slab or rooftop. They are not to beinstalled within any part of a structure such as an attic,crawl space, closet, or any other place where condenserair flow is restricted or other than outdoor ambient condi-tions prevail. Since the application of the units is of theoutdoor type, it is important to consult your local codeauthorities at the time the first installation is made.

Outside Slab Installation(Typical outdoor slab installations are shown in Figures 5 and6.)

1 Select a location where external water drainage cannotcollect around the unit.

2 Provide a level concrete slab extending 3" beyond all foursides 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 provideproper access for inspection and servicing.

4 Locate unit where operating sounds will not distrubowner or neighbors.

5 Locate unit so roof runoff water does not pour directly onthe unit. Provide gutter or other shielding at roof level.Do not locate unit in an area where excessive snow drift-ing may occur or accumulate.

6 Remove compressor shipping supports (if so equipped)after installation.

ClearancesThe following minimum clearances must be observed forproper unit performance and serviceability.

1 Provide 48" minimum clearance at the front of the unit.Provide 36" minimum clearance at the left and right sideof the unit for service access.

2 Provide 60" minimum clearance between top of unit andmaximum 3 foot overhang.

3 Unit is design certified for application on combustibleflooring with 0" minimum clearance.

4 See Figure 5 for illustration of minimum installation-ser-vice clearances.

Rooftop Installation1 Before locating the unit on the roof, make sure that the

strength of the roof and beams is adequate at that point to

ILL I308

Figure 5: Outside slab installation, basement or crawlspace distribution system

18”

12”

*Allow 57" foreconomizer on duct side.

*

Figure 6: Outside slab installation, closet distribution sys-tem. Slab floor construction.

ILL I309

IM 864 7

support the weight involved. (See specification sheet forweight of unit.) This is very important and user’s respon-sibility.

2 For rigging and roofcurb details, see Figures 7 and 8. Usefield-furnished spreaders.

3 For roofcurb assembly, see Roofcurb Installation Instruc-tions.

4 If the roofcurb is not used, provisions for disposing ofcondensate water runoff must be provided.

5 The unit should be placed on a solid and level roofcurb orplatform of adequate strength. See Figure 9.

6 The location of the unit on the roof should be such as toprovide proper access for inspection and servicing.

7 Remove compressor shipping supports (if so equipped)after installation.

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

ILL I296

A

B

D

C

38.25

CENTEROFGRAVITY25.75

Figure 7: Package air conditioner – rigging for lifting

CORNER WEIGHTS BY PERCENTAGE

A B C D

23% 27% 23% 27%

ILL I300

ILL I301

Figure 8: Package air conditioner – roofcurb installation

8 IM 864

Ductwork

Ductwork should be fabricated by the installing contractor inaccordance with local codes and NFPA90A. Industry manualsmay be used as a guide when sizing and designing the ductsystem - 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 condi-tioned as possible allowing clearance dimensions as indicated.Ducts should be run as directly as possible to supply andreturn outlets. Use of non-flammable waterproof flexible con-nectors on both supply and return connections at the unit toreduce noise transmission is recommended.

It is preferable to install the unit on the roof of the structure ifthe registers or diffusers are located on the wall or in the ceil-ing. A slab installation could be considered when the registersare low on a wall or in the floor.

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

Balancing dampers should be provided for each branch duct inthe supply system. Ductwork should be properly supportedfrom the structure.

When installing ductwork, consider the following items:

1 Noncombustible flexible connectors should be usedbetween ductwork and unit to reduce noise and vibrationtransmission into the ductwork.

2 When auxiliary heaters are installed, use noncombustibleflexible connectors and clearance to combustible materialof 0" for the first 3 feet of discharge duct. Clearance tounit top and side is 0".

FiltersThis unit is provided with 2 - 25" x 16" x 1" disposable fil-ters. When replacing filters, ensure they are inserted fully tothe back to prevent bypass.

Conversion ProcedureDownflow To Horizontal

1 Remove the screws and covers from the outside of thesupply and return sections.

2 Install the covers in the bottom supply and return open-ings with the painted side up. See Figure 10. Use theexisting gasket to seal the covers.

3 Secure the supply cover to the base of the unit with 1screw, engaging prepunched tab in unit base.

4 Secure the return cover to the base of the unit withscrews, engaging prepunched holes in the unit base.

Condensate DrainThe condensate drain connection of the evaporator is 3/4"nominal female pipe thread. IMPORTANT: Install a condensatetrap to ensure proper condensate drainage. See Figure 11.

Figure 9: Flat rooftop installation, attic or drop ceiling dis-tribution system. Mounted on roofcurb. Curb must belevel.

ILL I310

Figure 10: Cover gasket detail

ILL I631

Figure 11: Condensate Drain

Do not, under any circumstances, connect return ductworkto any other heat producing device such as a fireplaceinsert, stove, etc. Unauthorized use of such devices mayresult in fire, carbon monoxide poisoning, explosion, proper-ty damage, severe personal injury or death.

▲▲DANGER!

IM 864 9

Electrical WiringField wiring must comply with the National Electrical Code*and local ordinances that may apply.*C.E.C. in Canada

Power Wiring1 It is important that proper electrical power is available at

the unit. Voltage should not vary more than 10% fromthat stamped on the unit rating plate. On three phaseunits, phases must be balanced within 3%.

2 Install a branch circuit disconnect within sight of the unitand of adequate size to handle the starting current.Reference Figure 12 for proper location.

3 For branch circuit wiring (main power supply to unit dis-connect), the minimum wire size can be determined fromTable A using the circuit ampacity found on the unitnameplate.

4 This unit incorporates single point electrical connectionfor unit and electric heat accessory.

5 Power wiring must be run in grounded rain-tight conduit.Connect the power field wiring as follows:a NO ELECTRIC HEAT - Connect the field wires

directly to the contactor pigtail in the electric heataccess area. Connect ground wire to ground lug.

b WITH ELECTRIC HEAT - Connect the field wires tothe terminal block on the electric heater kit in the elec-tric heat access area. Connect the ground wire to theground lug on the heater kit.

NOTE: For field installation of a heater kit, follow the instructionsprovided with the heater kit.

6 The pigtail wires in the electric heat access area are facto-ry wired to the contactor in the control box.

7 DO NOT connect aluminum field wires to electric heatkit power input terminals.

WARRANTY WILL BE VOIDED IF CONNECTIONS ARENOT MADE PER INSTRUCTIONS

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 adjacent to

the compressor access panel. See Figure 2. Use a mini-mum #18 AWG thermostat wire. For wire lengthsexceeding 50', use #16 AWG thermostat wire. The lowvoltage wires are connected to the unit pigtails which aresupplied with the unit in the low voltage connection boxlocated below the unit control box.

3 Figure 14 shows representative low voltage connectiondiagrams. Read your thermostat installation instructionsfor any special requirements for your specific thermostat.NOTE: Units installed in Canada require that an outdoorthermostat (30,000 min. cycles of endurance) be installedand be wired with C.E.C. Class I wiring.

COPPER WIRE SIZE — AWG (1% VOLTAGE DROP)30025020015010050

SupplyWire

LengthFeet

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.

4468

1014

15

34468

12

20

23468

10

25

23446

10

30

123468

35

1/012468

40

1/012346

45

2/01/01346

50

2/01/01246

55

3/02/01/0234

60

3/02/01/0134

65

3/02/01/0124

70

4/03/02/01/023

75

4/03/02/01/023

80

4/03/02/01/013

85

4/04/03/01/012

90

2504/03/02/012

95

2504/03/02/012

100

2504/03/02/012

105

2504/03/02/01/02

110

3002504/02/01/01

115

3002504/03/01/01

120

3002504/03/01/01

125

3002504/03/01/01

130

3002504/03/01/01/0

135

3503503004/01/01/0

140

3503503004/02/01/0

145

3503503004/02/01/0

150

3503503004/02/02/0

155

Table A

Figure 12: Recommended location of branch circuitdisconnect

TO POWER

BRANCH CIRCUIT DISCONNECT

TO CONTROL

10 IM 864

Internal WiringIMPORTANT: Some single phase models are equipped with asingle pole contactor. Caution must be exercised when servicingas only one leg of the power supply is broken with the contactor.

Some models are equipped with electronically commutated blow-er motors which are constantly energized unless the main unitdisconnect is in the off position.

1 A diagram of the internal wiring of this unit is located onthe inside of the compressor access panel. If any of theoriginal wire as supplied with the unit must be replaced,the wire gauge and insulation must be the same as origi-nal wiring.

208 Volt ApplicationsTransformer is factory-wired for 220 volts on 200/220 voltmodels and must be changed for 200-volt applications. Seeunit wiring diagram for 200-volt wiring.

Grounding

ThermostatThe thermostat should be mounted on an inside wall aboutfive feet above the floor in a location where it will not beaffected by unconditioned air, sun, or drafts from open doorsor other sources. READ installation instructions in thermostatpackage CAREFULLY because each has some different

wiring requirements. The low voltage wiring should be sizedas shown in Table B.Install the room thermostat in accordance with the instructionsheet packed in the box with the thermostat.

Indoor Air Flow DataDirect-drive blower models are shipped factory wired for theproper speed at a typical external static. See BlowerPerformance Data. Belt-drive blower models have motorsheaves set for proper CFM at a typical external static.

Crankcase Heat (Optional)Crankcase heat is not required on scroll type compressors, butmay be necessary for difficult starting situations.

Pre-Start Check1 Is unit properly located and slightly slanted toward

indoor condensate drain?2 Is ductwork insulated, weatherproofed, with proper

spacing 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 with-

out rubbing, and are they tight on the motor shafts?8 Are the compressor shipping supports removed (if so

equipped)?

Startup1 Turn thermostat to “OFF,” turn “on” power supply at

disconnect 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 tem-perature. Unit should run in cooling mode.

6 Is outdoor fan operating correctly in the right direction?

ILL I312

Figure 13: Heater Kit Installation

The unit must be permanently grounded. A grounding lug isprovided in the electric heat kit access area for a groundwire. Failure to ground this unit can result in fire or electricalshock causing property damage, severe personal injury ordeath.

▲▲DANGER!

Table B

FIELD WIRE SIZE FOR 24 VOLT THERMOSTAT CIRCUITS

SOLID COPPER WIRE - AWG.

3.0 16 14 12 10 10 102.5 16 14 12 12 12 102.0 18 16 14 12 12 10

50 100 150 200 250 300Length of Run – Feet (1)T

her

mo

stat

Lo

ad -

Am

ps

(1) The total wire length is the distance from the furnace to the thermo-stat and back to the furnace.NOTE: DO NOT USE CONTROL WIRING SMALLER THAN NO. 18AWG.

11IM 864

7 Is compressor running correctly.8 Check the refrigerant charge using the instructions locat-

ed on compressor access panel. Replace service portcaps. Service port cores are for system access only andwill leak if not tightly capped.

9 Turn thermostat system switch to proper mode “HEAT”or “COOL” and set thermostat to proper temperature set-ting. Record the following after the unit has run sometime.a Operating Mode______________________________b Discharge Pressure (High) _________________PSIGc Vapor Pressure at Compressor (Low)_________PSIGd VaporLine Temperature at Compressor _________°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 ______________________Voltsj Current at Contactor______________________Ampsk Model Number_______________________________l Serial Number _______________________________

m Location ____________________________________

n Owner _____________________________________

o Date _______________________________________

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“ instruc-tions with owner.

OperationMost single phase units are operated PSC (no start relay orstart capacitor). It is important that such systems be off for aminimum of 5 minutes before restarting to allow equalizationof pressures. The thermostat should not be moved to cycle unitwithout waiting five minutes. To do so may cause the com-pressor to stop on an automatic open overload device or blowa fuse. Poor electrical service can cause nuisance tripping inoverloads or blow fuses.

IMPORTANT: The compressor has an internal overload protec-tor. Under some conditions, it can take up to 2 hours for thisoverload to reset. Make sure overload has had time to resetbefore condemning the compressor.

Some units are equipped with a time delay control (TDC1).The control allows the blower to operate for up to 60 secondsafter the thermostat is satisfied.

Figure 14: Low Voltage Connections Diagrams

STANDARD CONTROL WIRING

R

W

G

Y

Y2

C

RED

BLACK

GRAY

YELLOW

ORANGE

BROWN

THERMOSTATSUB-BASE

UNIT CONTROLSWIRE PIGTAILS

NOTE: Y2 IS ONLY USED WITH OPTIONAL ECONOMIZER.

12 IM 864

Auxiliary Heat

Control System Operation1 In the cooling mode, the thermostat will, on a call for

cooling, energize the compressor contactor and the indoorblower relay. The indoor blower can be operated continu-ously by setting the thermostat fan switch at the “ON”position.

2 In the heating mode, the thermostat will energize one ormore supplementary resistance heaters.

Replacement PartsTo find your local McQuay Certified Parts Distributor, go towww.mcquay.com and select Parts Locator.

Charge InformationRefer to the appropriate charge chart included in this manual.

TroubleshootingRefer to the troubleshooting chart included in this manual.

Wiring DiagramsRefer to the appropriate wiring diagram included in this manu-al.

Only electric heater kits supplied by this manufacturer asdescribed in this publication have been designed, tested,and evaluated by a nationally recognized safety testingagency for use with this unit. Use of any other manufacturedelectric heaters installed within this unit may cause haz-ardous conditions resulting in property damage, fire, bodilyinjury or death.

▲▲DANGER!

13IM 864IM 864

General DataNominal Sizes 3-5 Tons [10.6-17.6 kW] ASHRAE 90.1-2004 Compliant Models

McQuay MPS Series 003AYCK 003AYDK 004AYCK 004AYDKCooling Performance1

Gross Cooling Capacity Btu [kW] 37,400 [10.96] 37,400 [10.96] 49,000 [14.36] 49,000 [14.36]EER/SEER2 11.7/13 11.7/13 11.4/13.1Nominal CFM/ARI Rated CFM [L/s] 1200/1200 [566/566] 1200/1200 [566/566] 1600/1550 [755/731] 1600/1550 [755/731]ARI Net Cooling Capacity Btu [kW] 36,000 [10.55] 36,000 [10.55] 47,000 [13.77] 47,000 [13.77]Net Sensible Capacity Btu [kW] 26,400 [7.74] 26,400 [7.74] 33,600 [9.84] 33,600 [9.84]

Net System Power kW 3.08 3.08 4.15 4.15

Net Weight lbs. [kg] 543 [246] 543 [246] 580 [263] 580 [263]

CompressorNo./Type 1/Scroll 1/Scroll 1/Scroll 1/Scroll

Outdoor Sound Rating (dB)4 78 78 78 78Outdoor Coil—Fin Type Louvered Louvered Louvered LouveredTube Type Rifled Rifled Rifled RifledTube 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] 16.91 [1.57] 16.91 [1.57] 16.56 [1.54] 16.56 [1.54]Rows / FPI [FPcm] 1 / 22 [9] 1 / 22 [9] 2 / 22 [9] 2 / 22 [9]

Net Latent Capacity Btu [kW] 9,600 [2.81] 9,600 [2.81] 13,400 [3.93] 13,400 [3.93]

Indoor Coil—Fin Type Corrugated Corrugated Corrugated CorrugatedTube Type Rifled Rifled Rifled RifledTube 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] 5.17 [0.48] 5.17 [0.48] 5.17 [0.48] 5.17 [0.48]Rows / FPI [FPcm] 2 / 17 [7] 2 / 17 [7] 3 / 15 [6] 3 / 15 [6]Refrigerant Control TX Valves TX Valves TX Valves TX ValvesDrain Connection No./Size in. [mm] 1/0.75 [19.05] 1/0.75 [19.05] 1/0.75 [19.05] 1/0.75 [19.05]

Outdoor Fan—Type Propeller Propeller Propeller PropellerNo. Used/Diameter in. [mm] 1/24 [609.6] 1/24 [609.6] 1/24 [609.6] 1/24 [609.6]Drive Type/No. Speeds Direct/1 Direct/1 Direct/1 Direct/1CFM [L/s] 3680 [1737] 3680 [1737] 3680 [1737] 3680 [1737]No. Motors/HP 1 at 1/3 HP 1 at 1/3 HP 1 at 1/3 HP 1 at 1/3 HPMotor RPM 1075 1075 1075 1075

Indoor Fan—Type FC Centrifugal FC Centrifugal FC Centrifugal FC CentrifugalNo. Used/Diameter in. [mm] 1/10x10 [254x254] 1/10x10 [254x254] 1/10x10 [254x254] 1/10x10 [254x254]Drive Type/No. Speeds Direct/3 Direct/3 Direct/3 Belt/VariableNo. Motors 1 1 1 1Motor HP 1/2 1/2 1/2 1/2Motor RPM 1075 1075 1075 1725Motor Frame Size 48 48 48 48

Filter—Type Disposable Disposable Disposable DisposableFurnished Yes Yes Yes Yes(No.) Size Recommended in. [mm] (1)1x16x25 [25x406x635] (1)1x16x25 [25x406x635] (1)1x16x25 [25x406x635] (1)1x16x25 [25x406x635]

Refrigerant Charge Oz. [g] 93 [2637] 93 [2637] 167 [4734] 167 [4734]Weights

Ship Weight lbs. [kg] 550 [249] 550 [249] 587 [266] 587 [266]

11.4/13.1

(1)1x16x25 [25x406x635] (1)1x16x25 [25x406x635] (1)1x16x25 [25x406x635] (1)1x16x25 [25x406x635]

CONTINUED

[ ] Designates Metric Conversions

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 suitablefor operation to 20% of nominal cfm. Units are certified in accordance with the Unitary Air Conditioner Equipmentcertification program, which is based on ARI Standard 210/240 or 360.

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

IM 86414

General DataNominal Sizes 3-5 Tons [10.6-17.6 kW] ASHRAE 90.1-2004 Compliant Models

McQuay MPS Series 005AYCM 005AYDMCooling Performance1

Gross Cooling Capacity Btu [kW] 60,000 [17.58] 60,000 [17.58]EER/SEER2 11.6/13 11.6/13Nominal CFM/ARI Rated CFM [L/s] 2000/1900 [897/897] 2000/1900 [897/897]ARI Net Cooling Capacity Btu [kW] 58,000 [16.99] 58,000 [16.99]Net Sensible Capacity Btu [kW] 42,000 [12.31] 42,000 [12.31]

Net System Power kW 5 5

Net Weight lbs. [kg] 590 [268] 590 [268]

CompressorNo./Type 1/Scroll 1/Scroll

Outdoor Sound Rating (dB)4 83 83Outdoor Coil—Fin Type Louvered LouveredTube Type Rifled RifledTube Size in. [mm] OD 0.375 [9.5] 0.375 [9.5]Face Area sq. ft. [sq. m] 16.56 [1.54] 16.56 [1.54]Rows / FPI [FPcm] 2 / 22 [9] 2 / 22 [9]

Net Latent Capacity Btu [kW] 16,000 [4.69] 16,000 [4.69]

Indoor Coil—Fin Type Corrugated CorrugatedTube Type Rifled RifledTube Size in. [mm] 0.375 [9.5] 0.375 [9.5]Face Area sq. ft. [sq. m] 5.17 [0.48] 5.17 [0.48]Rows / FPI [FPcm] 3 / 15 [6] 3 / 15 [6]Refrigerant Control TX Valves TX ValvesDrain Connection No./Size in. [mm] 1/0.75 [19.05] 1/0.75 [19.05]

Outdoor Fan—Type Propeller PropellerNo. Used/Diameter in. [mm] 1/24 [609.6] 1/24 [609.6]Drive Type/No. Speeds Direct/1 Direct/1CFM [L/s] 3930 [1855] 3930 [1855]No. Motors/HP 1 at 1/3 HP 1 at 1/3 HPMotor RPM 1075 1075

Indoor Fan—Type FC Centrifugal FC CentrifugalNo. Used/Diameter in. [mm] 1/10x10 [254x254] 1/10x10 [254x254]Drive Type/No. Speeds Belt/Variable Belt/VariableNo. Motors 1 1Motor HP 1 1 Motor RPM 1725 1725Motor Frame Size 56 56

Filter—Type Disposable DisposableFurnished Yes Yes(No.) Size Recommended in. [mm] (1)1x16x25 [25x406x635] (1)1x16x25 [25x406x635]

Refrigerant Charge Oz. (Sys. 1/Sys. 2) [g] 160 [4536] 160 [4536]Weights

Ship Weight lbs. [kg] 597 [271] 597 [271]

(1)1x16x25 [25x406x635] (1)1x16x25 [25x406x635]

[ ] Designates Metric Conversions

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 suitablefor operation to 20% of nominal cfm. Units are certified in accordance with the Unitary Air Conditioner Equipmentcertification program, which is based on ARI Standard 210/240 or 360.

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

15

MiscellaneousELECTRICAL DATA

Minimum Circuit Ampacity 18/18

Unit

Info

rmat

ion

Unit OperatingVoltage Range 187-253

Minimum OvercurrentProtection Device Size 20/20

Maximum OvercurrentProtection Device Size 25/25

Com

pres

sor M

otor

No. 1Volts 208/230Phase 3

HP 3RPM 3450

Amps (RLA) 9.6/9.6Amps (LRA) 73/73

Cond

ense

r Mot

or


HP 1/3Amps (FLA) 1.5Amps (LRA) 3

Evap

orat

or F

an


HP 1/2Amps (FLA) 4Amps (LRA) 6.7 3.6

21/21

4601

1.91

1/31

4601

385.8

345033

4601

15

15

11

414-506

6.74

1/21

208/23013

1.51/31

208/2301

80.8/80.812.2/12.2

345043

208/2301

30/30

25/25

21/21

187-253

3.62

1/21

4601

1.91

1/31

4601416.1

345043

4601

15

15

11

414-506

243.813

208/2301

4.92.21/31

208/2301

110/11015.4/15.4

345053

208/2301

40/40

30/30

26/26

187-253

121.913

4601

1.91

1/31

4601

527.1

345053

4601

15

15

12

414-506

003AYCK 003AYDK 004AYCK 004AYDK 005AYCM 005AYDM

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

IM 864

16 IM 864

INDOOR AIRFLOW PERFORMANCE FOR 3-4 TON PACKAGED ROOFTOP SYSTEMDIRECT DRIVE

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

CF

M12

1011

9311

7511

5511

2510

7510

1592

5W

atts

450

400

395

385

380

375

370

360

CF

M15

1515

0014

7514

5014

0513

5012

7511

80W

atts

525

515

510

505

490

475

460

445

CF

M16

8016

5016

2515

8015

3014

6013

9012

80W

atts

650

640

630

610

580

560

545

515

CF

M12

1011

9311

7511

5511

2510

7510

1592

5W

atts

450

400

395

385

380

375

370

360

CF

M15

1515

0014

7514

5014

0513

5012

7511

80W

atts

525

515

510

505

490

475

460

445

CF

M16

8016

5016

2515

8015

3014

6013

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80W

atts

650

640

630

610

580

560

545

515

DIR

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17IM 864


0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

CF

M14

0013

7513

6013

3513

0512

5512

1011

00W

atts

470

460

455

450

440

435

425

410

CF

M16

8516

2015

8015

5015

0014

3013

5012

30W

atts

635

600

580

570

550

535

505

475

CF

M18

7018

3017

9017

3016

6015

8015

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75W

atts

780

760

740

700

660

635

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555

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7513

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3513

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5512

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460

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450

440

435

425

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8015

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3013

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580

570

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760

740

700

660

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18 IM 864


0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

CF

M14

0013

7513

6013

3513

0512

5512

1011

00W

atts

470

460

455

450

440

435

425

410

CF

M16

8516

2015

8015

5015

0014

3013

5012

30W

atts

635

600

580

570

550

535

505

475

CF

M18

7018

3017

9017

3016

6015

8015

0013

75W

atts

780

760

740

700

660

635

600

555

CF

M14

0013

7513

6013

3513

0512

5512

1011

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atts

470

460

455

450

440

435

425

410

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M16

8516

2015

8015

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3013

5012

30W

atts

635

600

580

570

550

535

505

475

CF

M18

7018

3017

9017

3016

6015

8015

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75W

atts

780

760

740

700

660

635

600

555

DIR

EC

T-D

RIV

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19IM 864

INDOOR AIRFLOW PERFORMANCE FOR 5 TON PACKAGED ROOFTOP SYSTEMBELT DRIVE

“M”

“L”

RP

M

— — — — 780

800

830

860

895

940

970

WA

TTS

— — — — 455

485

550

615

680

755

825

RP

M

— — 780

795

815

850

880

915

945

975

1015

WA

TTS

— — 390

450

470

530

605

655

735

795

880

RP

M

780

795

805

840

870

895

930

955

995

1015

1040

WA

TTS

370

405

425

490

540

590

655

705

780

830

925

RP

M

815

840

870

895

915

945

970

1005

1030

1065

1100

WA

TTS

385

415

470

530

540

640

700

760

830

910

1005

RP

M

875

895

915

940

965

995

1015

1040

1060

1100

1145

WA

TTS

425

440

510

570

675

675

730

820

880

965

1055

RP

M

930

945

965

990

1010

1035

1055

1090

1120

1150

1175

WA

TTS

460

500

560

605

660

720

790

870

940

1025

1085

RP

M

970

995

1015

1035

1055

1070

1105

1130

1155

1180

1225

WA

TTS

490

540

600

640

710

775

830

910

980

1050

1140

RP

M

1030

1045

1060

1075

1100

1120

1145

1170

1195

1225

1260

WA

TTS

540

595

640

680

760

810

875

950

1020

1095

1175

RP

M

1065

1080

1105

1120

1140

1160

1180

1210

1240

1265

1300

WA

TTS

570

615

680

725

785

850

910

995

1055

1125

1210

RP

M

1105

1135

1145

1160

1175

1200

1225

1250

1275

1310

1340

WA

TTS

595

650

705

755

810

890

950

1020

1100

1175

1255

RP

M

1150

1165

1180

1200

1225

1245

1260

1290

1320

1350

1370

WA

TTS

615

675

730

790

850

915

980

1060

1140

1230

1315

RP

M

1195

1215

1225

1245

1260

1290

1320

1335

1360

1375

1400

WA

TTS

645

700

750

815

880

960

1035

1100

1180

1260

1375

RP

M

1235

1255

1275

1300

1320

1335

1350

1370

1385

1405 —

WA

TTS

660

735

790

855

930

1000

1075

1150

1225

1320 —

RP

M

1300

1320

1340

1355

1365

1375

1385

1400 — — —

WA

TTS

705

775

840

905

985

1050

1120

1200 — — —

RP

M

1340

1355

1365

1375

1390

1405 — — — — —

WA

TTS

745

805

880

940

1020

1100 — — — — —

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

1.10

1.20

1.30

1.40

1.50

EX

TER

NA

L S

TATI

C P

RE

SS

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E–I

NC

HE

S O

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460

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5 TO

N P

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ON

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ION

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(13

SE

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CFM

1400

1500

1600

1700

1800

1900

2000

2100

2200

2300

2400

DRIV

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MO

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45

60

12

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1095

1040

995

940

890

835

780

1405

1360

1305

1250

1195

1145

1095

BE

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20 IM 864

AUXILIARY HEATER KITS CHARACTERISTICS AND APPLICATION

208-

240

VO

LT, T

HR

EE

PH

AS

E, 6

0 H

Z, A

UX

ILIA

RY

ELE

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ER

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Sin

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Sup

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itS

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it

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ter

Kit

Nom

inal

kW

Rat

ed H

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rkW

@20

8-24

0 V

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KB

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@20

8-24

0 V

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ter

Am

p. @

208-

240

V

Uni

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Am

paci

ty @

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Min

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@20

8 V

Min

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@24

0 V

Ove

r C

urre

ntP

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ize

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Kit

Min

. Ckt

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mpa

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Kit

Max

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Air

Con

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ner

Min

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mpa

city

208-

240

VM

in/M

ax @

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VM

in/M

ax @

240

V

Air

Con

ditio

ner

Ove

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urre

nt P

rote

ctiv

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evic

e S

ize

No

Hea

t-

--

18/1

820

/25

20/2

5-

-18

/18

20/2

520

/25

A06

C+

4.2/

5.6

14.3

3/19

.10

11.7

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520

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20/2

020

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15/1

715

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--

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+7.

2/9.

624

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32.7

520

.0/2

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435

/35

35/3

525

/29

25/3

0-

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Figure 15: Wiring Diagram – 3 and 4 Tons

26 IM 864

Figure 16: Wiring Diagram – 3 and 4 Tons

IM 864 27

Figure 17: Wiring Diagram – 5 Tons

28 IM 864

3 TON AIR CONDITIONER - 13 SEER

29IM 864


30 IM 864


31IM 864

SYMPTOM POSSIBLE CAUSE REMEDY

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

• 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-The high pressure

control opens at 450 PSIG• Interconnecting low voltage wiring damaged • Replace thermostat wiring

Condenser fan runs, compressor • Run capacitor defective (single phase only) • Replacedoesn’t • Start relay defective (single phase on;y) • Replace

• 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 ratingplate volts when unit is operating

• Low voltage condition • Add start kit components

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% ofnameplate 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 airfilter

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• TXV does not open • Replace TXV

High head-high or normal vapor • Dirty condenser coil • Clean coilpressure - Cooling mode • Refrigerant overcharge • Correct system charge

• Condenser fan not running • Repair or replace• Air or non-condensibles in system • Recover refrigerant, evacuate & recharge

Low head-high vapor pressures • Flow check piston size too large • Change to correct size piston• Defective Compressor valves • Replace compressor• Incorrect capillary tubes • Replace coil assembly

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

• Operating below 65°F outdoors • Add Low Ambient Kit• Moisture in system • Recover refrigerant - evacuate & recharge - add filter drier• TXV limiting refrigerant flow • Replace TXV

High vapor pressure • Excessive load • Recheck load calculation• Defective compressor • Replace

Fluctuating head & vapor • TXV hunting • Check TXV bulb clamp - check air distribution on coil - replacepressures TXV

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

Gurgle or pulsing noise at • Air or non-condensibles in system • Recover refrigerant, evacuate & rechargeexpansion 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 electricalshock resulting in personal injury or death.

▲▲DANGER!

32 IM 864

McQuay Training and Development

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.

WarrantyAll 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 yourlocal 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.

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

Documents

Part Number: 92-102421-01-00 Maverick I™ Date: March ......ILL I301 Figure 8: Package air conditioner – roofcurb installation 8 IM 864 Ductwork Ductwork should be fabricated by