McQuay Maverick I IM 865 MPS006AY Installation and Maintenance Manual

Brand: McQuay

Model: Maverick I IM 865 MPS006AY

Category: Garden tools

Type: Installation and Maintenance Manual

This manual is also suitable for

Maverick I MPS006AY

McQuay Maverick I IM 865 MPS006AY is a commercial packaged rooftop system designed for cooling only or heating and cooling, with electric/electric operation. It has a cooling capacity of 6 tons and is suitable for outdoor installations on a slab or rooftop. The unit features a condenser coil, condenser fan, compressor, control box, and blower. It is equipped with various safety features, including automatic controls for temperature regulation, overload protection, and high-pressure cut-off.

Maverick I™

Commercial Packaged Rooftop System

Cooling Only or Heating & Cooling

Electric/Electric

Model MPS006AY

6 Tons

Installat

ion and Maintenance Manual

IM 865

Group: Applied Systems

Part Number: 92-102421-04-00

Date: March 2007

2 IM 865

Table of Contents

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

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

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

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

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

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

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

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

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

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

Rooftop Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

General Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9

Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Ductwork. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Conversion Procedure . . . . . . . . . . . . . . . . . . . . . . . 11

Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Downflow to Horizontal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Electrical Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Power Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Control Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Internal Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Grounding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Indoor Air Flow Data . . . . . . . . . . . . . . . . . . . . . . . . . 13

Pre-Start Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Auxiliary Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Control System Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Replacement Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Charge Information . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

IM 865

Introduction

This 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 satisfaction

from it. Improper installation can result in unsatisfactory oper-

ation 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 the unit, inspect it for any damage from ship-

ment. Claims for damage, either shipping or concealed, should

be filed immediately with the shipping company. Check the

unit model number, electrical characteristics, and accessories

to determine if they are correct.

Equipment Protection From The

Environment

The metal parts of this unit may be subject to rust or deteriora-

tion 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 sys-

tems, and various chemical contaminants from industries such

as paper mills and petroleum refineries are especially corro-

sive.

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 building

away from the waterfront.

3 Shielding provided by a fence or shrubs may give some

protection.

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 with

fresh 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 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 contaminants.

Recognize this symbol as an indication of

Important Safety Information!

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 con-

junction 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 condi-

tioner and may also endanger life and property. The manu-

facturer disclaims any responsibility for such loss or injury

resulting from the use of such unauthorized components,

accessories or devices.

▲▲

DANGER

Proposition 65: This unit contains fiberglass insulation.

Respirable particles of fiberglass are known to the state of

California to cause cancer.

▲▲

WARNING

Disconnect all power to the unit before starting mainte-

nance. Failure to do so can result in severe electrical shock

or death.

▲▲

DANGER

4 IM 865

Figure 1: Unit Dimensions Bottom View

Figure 2: Unit Dimensions

ILL 1316

ILL1305

78.25

81.53

30.25

BASE ELECTRICAL

ENTRY

CONDENSER

COIL

CONDENSER COIL

CONROL ENTRY

COMPRESSOR/

CONTROL BOX

ACCESS

ELECTRIC HEAT ACCESS

CONDENSER FAN

DISCHARGE GRILLE

POWER

ENTRY

RETURN

AIR

SUPPLY

AIR

9.56

44.13

46.5

4.5

3.25

4.5

13.13

2.25

4.63

14.44

11.13

18.19

7.22

IM 865

Figure 3: Unit Dimensions

Figure 4: Unit Dimensions – Back View

ILL 1304

ILL 1288

82.25

25.13

12.25

5.5

19.13

4.94

6.84

13.72

12.25

31.22

3.81

82.25

24.03

48.06

5.34

COIL/FILTER

ACCESS

BLOWER

ACCESS

CONDENSATE DRAIN

3/4” NPT FEMALE

RETURN COVER/

OPTIONAL OUTDOOR

AIR HOOD LOCATION

SUPPLY COVER

6 IM 865

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 condi-

tions 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 5 and 6.)

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 12" minimum clearance at the front of the unit.

Provide 36" minimum clearance at the left and 18" on the

right side of the unit for service access.

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 5 for illustration of minimum installation-ser-

vice clearances.

*5 When used with economizer, 12" minimum dimension at

unit front becomes 57".

Figure 5: Outside Slab Installation, Basement or Crawl

Space Distribution System

Figure 6: Outside Slab Installation, Closet Distribution

System. Slab Floor Construction

ILL I308

ILL I309

*12ⴖ

18ⴖ

IM 865

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. (See specification sheet for

weight of unit.) This is very important and user’s respon-

sibility.

2 For rigging and roofcurb details, see Figures 7 and 8. Use

field-furnished spreaders.

NOTE: Remove shipping boards from unit before installing

on the roofcurb.

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 9.

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 8: Packaged Air Conditioner Roofcurb Installation

Figure 7: Packaged Air Conditioner Rigging For Lifting

CORNER WEIGHTS BY PERCENTAGE

ABCD

23% 29% 21% 27%

I296

SPREADER BAR

LIFTING BEAM

5/8ⴖ SHACKLE

(EACH CORNER)

39ⴖ

26-1/8

CENTER OF

GRAVITY

SUPPLY

RETURN

NAILING STRIP

OVERHANG

THIS END

ONLY

6-1/4ⴖ

NOTE

RETURN DUCT*

UNIT

SUPPLY DUCT*

INSULATION PANELS

(4) SUPPLIED

ST-A0801-20-01

GASKET

(FULL PERIMETER

AND ON DIVIDERS.

MUST BE ABOVE DUCT

AND INSULATION

PANEL FLANGES.)

ST-A0801-20-01

ROOFTOP UNIT

COUNTER FLASHING*

INSULATION*

1/4ⴖ TYP (3) SIDES

*SEE NOTE

CANT STRIP*

ROOF FELT*

INSULATION*

ROOF DECK*

*BY CONTRACTOR

ROOF

STRUCTURAL

MEMBER*

ROOFCURB

DUCT*

NAILER STRIP

GASKET

HOLD

DOWN

BRACKET

TYP. (4) PLCS.

CABLE OR

CHAIN

NOTE: Remove shipping boards from unit before installing on the roofcurb.

8 IM 865

General Data

Nominal Sizes 6 Tons [21.1 kW] ASHRAE 90.1-2004 Compliant Models

[] Designates Metric Conversions

McQuay MPS Series 006AYCL 006AYCM 006AYDL 006AYDM

Cooling Performance

Gross Cooling Capacity Btu [kW] 75,000 [21.97] 75,000 [21.97] 75,000 [21.97] 75,000 [21.97]

EER/SEER

10.3/9.5 10.3/9.5 10.3/NA

Nominal CFM/ARI Rated CFM [L/s] 2000/2400 [944/1133] 2000/2400 [944/1133] 2000/2400 [944/1133] 2000/2400 [944/1133]

ARI Net Cooling Capacity Btu [kW] 72,000 [21.1] 72,000 [21.1] 72,000 [21.1] 72,000 [21.1]

Net Sensible Capacity Btu [kW] 53,000 [15.53] 53,000 [15.53] 53,000 [15.53] 53,000 [15.53]

Net System Power kW 6.99 6.99 6.99 6.99

Net Weight lbs. [kg] 619 [281] 619 [281] 619 [281] 619 [281]

Integrated Part Load Value

11.5 11.5 11.5 11.5

Compressor

No./Type 2/Scroll 2/Scroll 2/Scroll 2/Scroll

Outdoor Sound Rating (dB)

83 83 83 83

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] 16.56 [1.54] 16.56 [1.54] 16.56 [1.54] 16.56 [1.54]

Rows / FPI [FPcm] 2 / 22 [9] 2 / 22 [9] 2 / 22 [9] 2 / 22 [9]

Net Latent Capacity Btu [kW] 19,000 [5.57] 19,000 [5.57] 19,000 [5.57] 19,000 [5.57]

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] 6.5 [0.6] 6.5 [0.6] 6.5 [0.6] 6.5 [0.6]

Rows / FPI [FPcm] 4 / 12 [5] 4 / 12 [5] 4 / 12 [5] 4 / 12 [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] 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/1

CFM [L/s] 4000 [1888] 4000 [1888] 4000 [1888] 4000 [1888]

No. Motors/HP 1 at 1/3 HP 1 at 1/3 HP 1 at 1/3 HP 1 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] 1/10x9 [254x229] 1/10x9 [254x229] 1/10x9 [254x229] 1/10x9 [254x229]

Drive Type/No. Speeds Belt/Variable Belt/Variable Belt/Variable Belt/Variable

No. Motors 1 1 1 1

Motor HP 1 1/2 1 1/2 1 1/2 1 1/2

Motor RPM 1725 1725 1725 1725

Motor Frame Size 0 0 0 0

Filter—Type Disposable Disposable Disposable Disposable

Furnished Yes Yes Yes Yes

(No.) Size Recommended in. [mm] (4)2x16x16 [51x406x406] (4)2x16x16 [51x406x406] (4)2x16x16 [51x406x406] (4)2x16x16 [51x406x406]

Refrigerant Charge Oz. (Sys. 1/Sys. 2) [g] 88/88 [2495/2495] 88/88 [2495/2495] 88/88 [2495/2495] 88/88 [2495/2495]

Weights

Ship Weight lbs. [kg] 628 [285] 628 [285] 628 [285] 628 [285]

10.3/NA

CONTINUED

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 S

EER 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 Sta

ndard 270.

IM 865

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 S

EER 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 Sta

ndard 270.

General Data

Nominal Sizes 6 Tons [21.1 kW] ASHRAE 90.1-2004 Compliant Models

[] Designates Metric Conversions

McQuay MPS Series 006AYYL 006AYYM

Cooling Performance

Gross Cooling Capacity Btu [kW] 75,000 [21.97] 75,000 [21.97]

EER/SEER

10.3/NA 10.3/NA

Nominal CFM/ARI Rated CFM [L/s] 2000/2400 [944/1133] 2000/2400 [944/1133]

ARI Net Cooling Capacity Btu [kW] 72,000 [21.1] 72,000 [21.1]

Net Sensible Capacity Btu [kW] 53,000 [15.53] 53,000 [15.53]

Net System Power kW 6.99 6.99

Net Weight lbs. [kg] 619 [281] 619 [281]

Integrated Part Load Value

11.5 11.5

Compressor

No./Type 2/Scroll 2/Scroll

Outdoor Sound Rating (dB)

83 83

Outdoor Coil—Fin Type Louvered Louvered

Tube Type Rifled Rifled

Tube 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] 19,000 [5.57] 19,000 [5.57]

Indoor Coil—Fin Type Louvered Louvered

Tube Type Rifled Rifled

Tube Size in. [mm] 0.375 [9.5] 0.375 [9.5]

Face Area sq. ft. [sq. m] 6.5 [0.6] 6.5 [0.6]

Rows / FPI [FPcm] 4 / 12 [5] 4 / 12 [5]

Refrigerant Control Capillary Tubes Capillary Tubes

Drain Connection No./Size in. [mm] 1/1 [25.4] 1/1 [25.4]

Outdoor Fan—Type Propeller Propeller

No. Used/Diameter in. [mm] 1/24 [609.6] 1/24 [609.6]

Drive Type/No. Speeds Direct/1 Direct/1

CFM [L/s] 4000 [1888] 4000 [1888]

No. Motors/HP 1 at 1/3 HP 1 at 1/3 HP

Motor RPM 1075 1075

Indoor Fan—Type FC Centrifugal FC Centrifugal

No. Used/Diameter in. [mm] 1/10x9 [254x229] 1/10x9 [254x229]

Drive Type/No. Speeds Belt/Variable Belt/Variable

No. Motors 1 1

Motor HP 1 1/2 1 1/2

Motor RPM 1725 1725

Motor Frame Size 0 0

Filter—Type Disposable Disposable

Furnished Yes Yes

(No.) Size Recommended in. [mm] (4)2x16x16 [51x406x406] (4)2x16x16 [51x406x406]

Refrigerant Charge Oz. (Sys. 1/Sys. 2) [g] 88/88 [2495/2495] 88/88 [2495/2495]

Weights

Ship Weight lbs. [kg] 628 [285] 628 [285]

10 IM 865

Miscellaneous

ELECTRICAL DATA

Minimum Circuit Ampacity 34/34

Unit Information

Unit Operating

Voltage Range

187-253

Minimum Overcurrent

Protection Device Size

40/40

Maximum Overcurrent

Protection Device Size

40/40

Compressor Motor

No. 2

Volts 208/230

Phase 3

HP 3

RPM 3450

Amps (RLA) 11.4/11.4

Amps (LRA) 77/77

Condenser Motor

No. 1

Volts 208/230

Phase 1

HP 1/3

Amps (FLA) 2.6

Amps (LRA) 4.7

Evaporator Fan

No. 1

Volts 208/230

Phase 3

HP 1 1/2

Amps (FLA) 5.8

Amps (LRA) 0 0

5.8

1 1/2

208/230

4.7

2.6

1/3

208/230

77/77

11.4/11.4

3450

208/230

40/40

34/34

187-253

2.8

1 1/2

460

2.4

1/3

460

5.9

3450

460

414-506

2.8

1 1/2

460

2.4

1/3

460

5.9

3450

460

414-506

2.3

1 1/2

575

1.5

0.9

1/3

575

4.7

3450

575

518-632

2.3

1 1/2

575

1.5

0.9

1/3

575

4.7

3450

575

518-632

006AYCL 006AYCM 006AYDL 006AYDM 006AYYL 006AYYM

1. Horsepower Per Compressor.

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

Table A

IM 865

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 condi-

tioned 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 con-

nectors 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 ceil-

ing. 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 vibra-

tion transmission into the ductwork.

2 When auxiliary heaters are installed, use noncom-

bustible flexible connectors and clearance to com-

bustible material of 0" for the first 3 feet of discharge

duct.

Filters

This unit is provided with 4 - 16" x 16" x 2" disposable filters.

When replacing filters, ensure they are inserted fully to the

back to prevent bypass.

Conversion Procedure

Downflow to Horizontal

1 Remove the screws and covers from the outside of the

supply and return sections.

2 Install the covers in the bottom supply and return open-

ings with the painted side up. See Figure 10. Use the

existing gasket to seal the covers.

3 Secure the supply cover to the base of the unit with 1

screw, engaging prepunched tab in unit base.

4 Secure the return cover to the base of the unit with

screws, engaging prepunched holes in the unit base.

Condensate Drain

The condensate drain connection of the evaporator is 3/4"

nominal female pipe thread. IMPORTANT: Install a conden-

sate trap to ensure proper condensate drainage. See Figure 11.

Figure 9: Flat Rooftop Installation, Attic or Drop Ceiling

Distribution System. Mounted on Roofcurb. Curb Must Be

Level.

Figure 10: Cover Gasket Detail

ILL I310

ILL I631

Do not, under any circumstances, connect return ductwork

to any other heat producing device such as a fireplace

insert, stove, etc. Unauthorized use of such devices may

result in fire, carbon monoxide poisoning, explosion, proper-

ty damage, severe personal injury or death.

▲▲

DANGER

Figure 11: Condensate Drain

12 IM 865

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 It is important that proper electrical power is available at

the unit. Voltage should not vary more than 10% from

that stamped on the unit rating plate. On three phase

units, phases must be balanced within 3%.

2 Install a branch circuit disconnect within sight of the unit

and of adequate size to handle the starting current. (See

Tables A and F.) A bracket is shipped with the unit for

mounting the disconnect. 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 from

Table B using the circuit ampacity found on the unit

nameplate or from Tables A and E.

4 This unit incorporates single point electrical connection

for 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 heat

access area. Connect ground wire to ground lug.

b WITH ELECTRIC HEAT - Connect the field wires to

the terminal block on the electric heater kit in the elec-

tric heat access area. Connect the ground wire to the

ground lug on the heater kit.

NOTE: For field installation of a heater kit, follow the instructions

provided 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 heat

kit power input terminals.

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 lengths

exceeding 50', use #16 AWG thermostat wire. The low

voltage wires are connected to the unit pigtails which are

supplied with the unit in the low voltage connection box

located below the unit control box.

3 Figure 14 shows representative low voltage connection

diagrams. Read your thermostat installation instructions

for any special requirements for your specific thermostat.

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 compressor 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 origi-

nal 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

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

300

250

200

150

100

Supply

Wire

Length

Feet

1/0

2/0

1/0

2/0

1/0

3/0

2/0

1/0

3/0

2/0

1/0

3/0

2/0

1/0

4/0

3/0

2/0

1/0

4/0

3/0

2/0

1/0

4/0

3/0

2/0

1/0

4/0

3/0

1/0

250

4/0

3/0

2/0

250

4/0

3/0

2/0

100

250

4/0

3/0

2/0

105

250

4/0

3/0

2/0

1/0

110

300

250

4/0

2/0

1/0

115

300

250

4/0

3/0

1/0

120

300

250

4/0

3/0

1/0

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.

Figure 12: Recommended Location of Branch Circuit

Disconnect

TO POWER

BRANCH CIRCUIT DISCONNECT

TO CONTROL

The unit must be permanently grounded. A grounding lug is

provided in the electric heat kit 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

IM 865

GROUNDING MAY BE ACCOMPLISHED BY GROUND-

ING 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. READ installation instructions in thermostat

package CAREFULLY because each has some different

wiring requirements. 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 Table F for blower per-

formance.

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

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.

Figure 14: Low Voltage Connections Diagrams

STANDARD CONTROL WIRING

RED

BLACK

GRAY

YELLOW

ORANGE

BROWN

THERMOSTAT

SUB-BASE

UNIT CONTROLS

WIRE PIGTAILS

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 thermo-

stat and back to the furnace.

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

AWG.

14 IM 865

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?

7 Is compressor running correctly?

8 Check the refrigerant charge using the instructions

located on compressor access panel. Replace service

port caps. Service port cores are for system access only

and will leak if not tightly capped.

9 Turn thermostat system switch to proper mode “HEAT”

or “COOL” and set thermostat to proper temperature

setting. Record the following after the unit has run some

time.

a Operating Mode _____________________________

b Discharge Pressure (High) _________________PSIG

c Vapor Pressure at Compressor (Low) ________PSIG

d Vapor Line 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 _____________________Volts

j Current at Contactor _____________________Amps

k Model Number ______________________________

l Serial Number_______________________________

mLocation ___________________________________

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“

instructions with owner.

Operation

Most single phase units are operated PSC (no start relay or

start capacitor). It is important that such systems be off for a

minimum of 5 minutes before restarting to allow equalization of

pressures. The thermostat should not be moved to cycle unit

without waiting five minutes. To do so may cause the compres-

sor to stop on an automatic open overload device or blow a

fuse. Poor electrical service can cause nuisance tripping in

overloads or blow fuses.

IMPORTANT: The compressor has an internal overload protec-

tor. Under some conditions, it can take up to 2 hours for this

overload to reset. Make sure overload has had time to reset

before condemning the compressor.

Some units are equipped with a time delay control (TDC1). The

control allows the blower to operate for up to 60 seconds after

the thermostat is satisfied.

Auxiliary Heat

Control System Operation

1 In the cooling mode, the thermostat will, on a call for

cooling, energize the compressor contactors and the

indoor blower relay. The indoor blower can be operat-

ed continuously by setting the thermostat fan switch at

the “ON” position.

2 In the heating mode, the thermostat will energize one

or more supplementary resistance heaters, if included.

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 included 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 haz-

ardous conditions resulting in property damage, fire, bodily

injury or death.

▲▲

DANGER

Figure 13: Heater Kit Installation

ILL I312

IM 865

AIR-FLOW PERFORMANCE – 6 TON BELT DRIVE

TABLE D

RPM WATTS

——

780 660

815 720

845 780

870 855

900 945

930 1075

RPM WATTS

1010 760

1020 815

1050 900

1065 960

1080 1045

1100 1130

1120 1215

1135 1300

1165 1425

1185 1540

RPM WATTS

1210 1015

1220 1115

1230 1205

1240 1295

1255 1380

——

6 TON PACKAGE UNIT

VOLTAGE: 208/230 - 460 & 575 - 3 PHASE

E.S.P. – INCHES WATER

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

1800

1900

2000

2100

2200

2300

2400

2500

2600

2700

RPM WATTS

——

775 600

810 650

825 700

855 760

880 835

910 915

940 1005

970 1100

RPM WATTS

785 560

830 615

860 675

880 740

910 810

930 870

950 945

960 1020

1005 1105

1030 1200

RPM WATTS

850 605

875 660

895 720

920 780

945 850

960 910

990 990

1020 1085

1040 1175

1060 1260

RPM WATTS

895 650

915 700

930 750

955 820

980 880

1000 960

1025 1050

1045 1140

1065 1225

1090 1335

RPM WATTS

930 670

955 740

975 800

995 860

1015 930

1035 1005

1055 1110

1080 1200

1100 1295

1125 1395

RPM WATTS

975 720

990 770

1015 840

1030 920

1050 1000

1065 1060

1085 1155

1110 1260

1135 1350

1155 1470

RPM WATTS

1050 800

1070 855

1065 940

1100 1025

1120 1100

1135 1180

1150 1335

1175 1390

1200 1505

1220 1615

RPM WATTS

1090 850

1105 925

1120 1000

1130 1080

1145 1180

1160 1250

1185 1355

1205 1450

1225 1580

1235 1875

RPM WATTS

1120 890

1135 960

1145 1035

1160 1130

1180 1220

1200 1325

1220 1430

1230 1530

1240 1635

1255 1730

“M”

RPM WATTS

1150 940

1165 1015

1175 1090

1190 1180

1205 1260

1220 1370

1235 1470

1250 1580

1270 1665

——

RPM WATTS

1180 980

1195 1075

1205 1150

1220 1250

1230 1330

1240 1425

1255 1525

1295 1630

——

AIR

FLOW

CFM

DRIVE PACKAGE “L” “M”

MOTOR H.P. 1 1/2 11/2

BLOWER SHEAVE 6.4ⴖ PITCH DIAMETER 6.4ⴖ PITCH DIAMETER

MOTOR SHEAVE 2.8ⴖ - 3.8ⴖ PITCH DIAMETER 3.4ⴖ - 4.4ⴖ PITCH DIAMETER

TURNS OPEN 0 1 2 3 4 5 6 0 1 2 3 4 5 6

RPM 1100 1050 1000 945 895 845 780 1295 1230 1195 1145 1100 1050 1000

STANDARD INDOOR AIRFLOW - CFM

COMPONENT 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800

RESISTANCE - INCHES WATER

WET COIL .035 .040 .060 .070 .085 .100 .110 .120 .125 .130

DOWNFLOW .055 .060 .066 .072 .080 .086 .093 .100 .107 .115

ECONOMIZER

R. A. DAMPER

.05 .06 .07 .08 .09 .10 .11 .12 .13 .15

COMPONENT AIR RESISTANCE

NOTES:

1. PERFORMANCE SHOWN WITH DRY COIL & STANDARD FILTERS

2. STANDARD CFM @ .075 LBS./CU. FT.

3. MOTOR EFFICIENCY = 80%

4. BHP = WATTS X MOTOR EFF.

746

5. ADD COMPONENT RESISTANCE TO DUCT STATIC TO DETERMINE TOTAL E.S.P.

RPM WATTS

——

785 580

815 625

840 680

865 750

890 830

920 900

945 975

975 1060

1000 1145

“L”

16 IM 865

TABLE E: AUXILIARY HEATER KITS CHARACTERISTICS AND APPLICATION

MAX. FUSE OR HEATER KIT AIR CONDITIONER

CKT. BKR. MAX. FUSE OR AIR MAX. FUSE

UNIT HEATER KIT HEATER KW HEATER KIT UNIT MIN. CKT. SIZE (CKT. BKR. HEATER KIT CKT. BKR. SIZE CONDITIONER OR CKT. BKR.

MODEL MODEL NO. @ 208/240* FLA AMPACITY MUST BE MIN. CKT. (CKT. BKR. MUST MIN. CKT. SIZE (CKT. BKR.

NUMBER HACR TYPE FOR AMPACITY BE HACR TYPE AMPACITY MUST BE HACR

USA) FOR USA) TYPE FOR USA)

NONE — — 34/34 40/40 — — 34/34 40/40

A06C 4.2/5.6 11.7/13.5 34/34 40/40 15/17 15/20

A10C 7.2/9.6 20.0/23.1 34/37 40/40 25/29 25/30

A11C 7.2/9.6 20.0/23.1 34/37 40/40 25/29 25/30

MPS006AYCL A12C 8.4/11.2 23.4/27.0 37/41 40/45 30/34 30/35

A15C 10.8/14.4 30.1/34.7 45/51 45/60 38/44 40/45

A20C 14.4/19.2 40.1/46.2 58/65 60/70 50/58 50/60

A21C 14.4/19.2 40.1/46.2 58/65 60/70 50/58 50/60

A24C 18.0/24.0 50.1/57.8 70/80 70/80 63/73 70/80

NONE — — 34/34 40/40 — — 34/34 40/40

A06C 4.2/5.6 11.7/13.5 34/34 40/40 15/17 15/20

A10C 7.2/9.6 20.0/23.1 34/37 40/40 25/29 25/30

A11C 7.2/9.6 20.0/23.1 34/37 40/40 25/29 25/30

MPS006AYCM A12C 8.4/11.2 23.4/27.0 37/41 40/45 30/34 30/35

A15C 10.8/14.4 30.1/34.7 45/51 45/60 38/44 40/45

A20C 14.4/19.2 40.1/46.2 58/65 60/70 50/58 50/60

A21C 14.4/19.2 40.1/46.2 58/65 60/70 50/58 50/60

A24C 18.0/24.0 50.1/57.8 70/80 70/80 63/73 70/80

NONE — — 18 20 — — 18 20

A06D 5.6 6.7 18 20 9 10

A10D 9.6 11.6 18 20 15 15

A11D 9.6 11.6 18 20 15 15

MPS006AYDL A12D 11.2 13.5 21 25 17 20

A15D 14.4 17.3 26 30 22 25

A20D 19.2 23.1 33 35 30 30

A21D 19.2 23.1 33 35 29 30

A24D 24.0 28.9 40 40 37 40

NONE — — 18 20 — — 18 20

A06D 5.6 6.7 18 20 9 10

A10D 9.6 11.6 18 20 15 15

A11D 9.6 11.6 18 20 15 15

MPS006AYDM A12D 11.2 13.5 21 25 17 20

A15D 14.4 17.3 26 30 22 25

A20D 19.2 23.1 33 35 30 30

A21D 19.2 23.1 33 35 29 30

A24D 24.0 28.9 40 40 37 40

NONE — — 14 15 — — 14 15

A15Y 14.4 13.9 21 25 18 20

MPS006AYYL A20Y 19.2 18.5 26 30 24 25

A24Y 24.0 23.1 32 35 29 30

NONE — — 14 15 — — 14 15

A15Y 14.4 13.9 21 25 18 20

MPS006AYYM A20Y 19.2 18.5 26 30 24 25

A24Y 24.0 23.1 32 35 29 30

IM 865

6 TON AIR CONDITIONER

SYSTEM CHARGE CHART - REFRIGERANT 22

6 TON - CIRCUIT 01

18 IM 865

6 TON AIR CONDITIONER

SYSTEM CHARGE CHART - REFRIGERANT 22

6 TON - CIRCUIT 02

IM 865

TROUBLE SHOOTING CHART

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-The high pressure

control opens at 450 PSIG

• Interconnecting low voltage wiring damaged • Replace thermostat wiring

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

doesn’t • Start relay defective (single phase only) • 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 rating

plate 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% 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

• 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

Low head-high vapor pressures • 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 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

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

20 IM 865

ELECTRICAL WIRING DIAGRAM

208 / 230/460/575, 3 PHASE, 60 HZ.

BELT DRIVE

DUAL CIRCUIT

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McQuay Maverick I IM 865 MPS006AY Installation and Maintenance Manual

Brand: McQuay

Model: Maverick I IM 865 MPS006AY

Category: Garden tools

Type: Installation and Maintenance Manual

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