McQuay MPS006B Installation Manual

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Installation and Maintenance Manual IM 971-1

Maverick™ I Commercial Packaged Rooftop Systems

Heating & Cooling

Models MPS006B - MPS012B

6 to 12 Tons

R-410A Refrigerant

Group: Applied Air Systems Part Number: IM 971-1 Date: July 2010

Contents

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

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

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

Safety Information . . . . . . . . . . . . . . . . . . . . 3

Major Components. . . . . . . . . . . . . . . . . . . . . . . . 3

Mechanical Installation . . . . . . . . . . . . . . . . . . . . . . 4

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Pre-Installation Check-Points . . . . . . . . . . . . . 4

Location Considerations . . . . . . . . . . . . . . . . . 4

Outside Installation . . . . . . . . . . . . . . . . . . . . . 5

Attaching Exhaust and Combustion Air Inlet

Hoods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Cover Panel Installation/Conversion

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Filter Replacement . . . . . . . . . . . . . . . . . . . . . 6

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

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

Ductwork. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Return Air . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Gas Supply, Condensate Drain. . . . . . . . . . . . 8

Adjusting or Checking Furnace Input . . . . . . . 9

Condensate Drain. . . . . . . . . . . . . . . . . . . . . 10

Electrical Installation . . . . . . . . . . . . . . . . . . . . . . 11

Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Power Supply . . . . . . . . . . . . . . . . . . . . . . . . 11

Hook-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

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

208 Volt Applications. . . . . . . . . . . . . . . . . . . 12

Customer Supplied Thermostat . . . . . . . . . . 12

Optional Factory Supplied Thermostat . . . . . 13

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

Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Unit Capacity and Physical Data . . . . . . . . . . . . 26

Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Compressor and Condenser Motor . . . . . . . . . . 28

MCA and MCOP . . . . . . . . . . . . . . . . . . . . . . . . 29

Auxiliary Heater Data . . . . . . . . . . . . . . . . . . . . . 30

Dimensional Data . . . . . . . . . . . . . . . . . . . . . . . . . 34

Unit Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . 34

Duct Dimensions . . . . . . . . . . . . . . . . . . . . . . . . 35

Curb Dimensions. . . . . . . . . . . . . . . . . . . . . . . . 35

Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . 36

Airflow Performance . . . . . . . . . . . . . . . . . . . . . 36

Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Economizers: 6–12.5 Tons [21.1–44 kW] . . . . . 42

Economizers: 6–12.5 Tons [21.1–44 kW]

Horizontal Duct Installation . . . . . . . . . . . . . . . . 43

Fresh Air Dampers and Power Exhaust . . . . . . 44

Power Exhaust Kit For Economizers:

6–12 Tons [21.1–70.3 Kw] . . . . . . . . . . . . . . 44

Fresh Air Damper Kit for 6–12.5 Ton

[21.1–44.0 Kw] Units . . . . . . . . . . . . . . . . . . 46

Roofcurbs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Roofcurbs (Full Perimeter): 6–12.5 Tons

[21.1–44.0 kW] . . . . . . . . . . . . . . . . . . . . . . . 47

Controls and Operation . . . . . . . . . . . . . . . . . . . . 48

Furnace Section Controls and Ignition System . 48

Normal Furnace Operating Sequence . . . . . 48

Operating Instructions . . . . . . . . . . . . . . . . . 49

Burners. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Manual Reset Over-Temperature Control . . 50

Pressure Switch . . . . . . . . . . . . . . . . . . . . . . 50

Limit Control . . . . . . . . . . . . . . . . . . . . . . . . . 50

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Advise The Customer. . . . . . . . . . . . . . . . . . 51

Unit Maintenance. . . . . . . . . . . . . . . . . . . . . . . . 51

Furnace Section . . . . . . . . . . . . . . . . . . . . . . 51

Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Cooling Section Maintenance . . . . . . . . . . . 52

System Charging Charts . . . . . . . . . . . . . . . . . . 53

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Cooling Troubleshooting Chart . . . . . . . . . . . . . 58

Furnace Troubleshooting Guide . . . . . . . . . . . . 59

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Replacement Parts . . . . . . . . . . . . . . . . . . . . . . 61

Introduction

General

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

Introduction

WARNING

Install this unit only in a location and position as specified in the Mechanical Installation section of these instructions. Provide adequate combustion and ventilation air to the unit space as specified in the venting section of these instructions.

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

This product line does have an optional DDC controller. For operation and information on using and programming the MicroTech II unit controller, refer to the appropriate operation manual (see Table 1).

For a description of operation and information on using the keypad to view data and set parameters, refer to the appropriate program-specific operation manual (see Table 1).

Table 1: Operation, Installation and Maintenance Resources

Unit Manual

Rooftop unit control configuration DDC Unit Controller OM 1077

BACnet Communication Module IM 1000 LonWorks Communication Module IM 999

Operation manual bulletin number

Checking Product Received

Upon receiving the unit, inspect it for any damage from shipment. Claims for damage, either shipping or concealed, should be filed immediately with the shipping company. IMPORTANT: Check the unit model number, heating size, electrical characteristics, and accessories to determine if they are correct.

Safety Information

DANGER

WARNING

Combustion products must be discharged outdoors. Connect this unit to an approved vent system only, as specified in

Mechanical Installation section of these instructions.

WARNING

Use only with type of gas approved for this unit. Refer to the unit rating plate.

DANGER

Never test for gas leaks with an open flame. It can cause an explosion or fire resulting in property damage, personal injury or death. Use a commercially available soap solution made specifically for the detection of leaks to check all connections, as specified in the Mechanical Installation section of these instructions.

WARNING

Always install unit to operate within the unit's intended temperature-rise range with a duct system which has an external static pressure within the allowable range, as specified in the Mechanical Installation section of these instructions. See also unit rating plate.

DANGER

Units are not design certified to be installed inside the structure. Doing so can cause inadequate unit performance as well as property damage and carbon monoxide poisoning resulting in personal injury or death.

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.

WARNING

Provide adequate combustion and ventilation air to the unit space as specified in the combustion and ventilation air section of these instructions.

Major Components

The unit includes a hermetically-sealed refrigerating system consisting of a scroll compressor, condenser coil, evaporator coil with capillary tube assembly, circulation air blower, condenser fan, heat exchanger assembly, gas burner and control assembly, combustion air motor and fan, and all necessary internal electrical wiring. The unit’s cooling system is factory-evacuated, charged and performance tested. Refrigerant amount and type are indicated on rating plate.

The unit is available in 150,000, 225,000 and 252,000 BTUH heating input. Cooling capacity is 6.5, 7.5, 8.5, 10 and 12 nominal tons. Units are convertible from bottom supply and return to side supply and return by relocation of supply and return air cover panels. The units are weatherized for mounting outside of the building.

McQuay IM 971-1 3

Mechanical Installation

General

WARNING

When a unit is installed so that supply ducts carry air circulated by the unit to areas outside the space containing the unit, the return air shall also be handled by duct(s) sealed to the unit casing and terminating outside the space containing the unit.

Install this unit in accordance with The American National Standard Z223.1-latest edition manual entitled “National Fuel Gas Code,” and the requirements or codes of the local utility or other authority having jurisdiction.

Additional helpful publications available from the “National Fire Protection Association” are: sNFPA-90A - Installation of Air Conditioning and Ventilating Systems 1985 or latest edition. NFPA-90B - Warm Air Heating and Air Conditioning Systems 1984.

These publications are available from: National Fire Protection Association, Inc.

Batterymarch Park Quincy, MA 02269

Pre-Installation Check-Points

1 Before attempting any installation, carefully consider the

following points:

a Structural strength of supporting members (rooftop

installation)

b Clearances and provision fo r servi cing power supply

and wiring

c Gas supply and piping d Air duct connections and sizing e Drain facilities and connections f Location for minimum noise and vibration - away

from bedroom windows

Location Considerations

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, give special attention 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 by a fence or shrubs may give some protection. 4 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.

5 Regular cleaning and waxing of the cabinet with a good

automobile polish will provide some protection.

6 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.

WARNING

This unit may be used to heat the building or structure during construction if the following installation requirements are met. Installation must comply with all install ation instructions including:

• Proper vent installation

• Furnace operating under thermostatic control

• Return air duct sealed to the furnace

• Air filters in place

• Set furnace input rate and temperature rise per rating plate

marking

• Means of providing outdoor air required for combustion

• Return air temperature maintained between 55°F (13°C )

and 80°F (27°C)

• Installation of exhaust and combustion air inl e t hoods

completed

• Clean furnace, duct work and components upon

substantial completion of the construction process, and verify furnace operating conditions including ignition, input rate, temperature rise and venting, according to the instructions.

4 McQuay IM 971-1

Mechanical Installation

Outside Installation

DANGER

These units are designed certified for outdoor installation only. Installation inside any part of a structure can result in inadequate unit performance as well as property damage. Installation inside can also cause recirculation of flue products into the conditioned space resulting in personal injury or death.

(Typical outdoor slab installation is show n in Figure 1.)

1 Select a location where external water drainage cannot

collect around unit.

2 Provide a level slab sufficiently high enough above grade

to prevent surface water from entering the unit

3 Locate the unit to provide proper access for inspection

and servicing as shown in Figure 3, page 6.

4 Locate unit where operating sounds will not disturb

owner or neighbors.

Figure 1: Outside Slab Installation

8 Remove compressor shipping supports (if so equipped)

after installation.

Attaching Exhaust and Combustion Air Inlet Hoods

IMPORTANT: Do not operate this unit without the exhaust/ combustion air inlet hood properly installed. This hood is shipped in a carton in the blower compartment inside the unit and must be attached when the unit is installed. See Figure 34,

page 42.

To attach exhaust/combustion air inlet hood:

1 Remove screws securing blower access panel and

remove access panel. For location of blower access panel, see Figure 26, page 34 .

2 Remove exhaust/combustion air inlet hood from the

carton, located inside the blower compartment.

3 Attach blower access panel. 4 Attach the combustion air inlet/exhaust hood with

screws. Reference Figure 26, page 34 for proper location. Screws are in carton with the hood.

5 Vent the unit using the flue exhaust hood, as supplied

from the factory, without alteration or addition. The only exception is with factory approved additions. Consult your local utility or other authority having jurisdiction for accepted venting techniques.

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.

6 Where snowfall is anticipated, the height of the unit

above the ground level must be considered. Mount unit high enough to be above anticipated maximum area snowfall and to allow combustion air to enter the combustion air inlet.

7 Select an area which will keep the areas of the vent, air

intake, and A/C condenser fins free and clear of obstructions such as weeds, shrubs, vines, snow, etc.Inform the user accordingly.

Cover Panel Installation/Conversion Procedure

Downflow To Horizontal

1 Remove the screws and covers from the outside of the

supply and return sections. See Figure 2.

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 2.

3 Secure the return and supply cover to front bracket with

one (1) screw .

Figure 2: Cover Gasket Detail, Downflow to Horizontal

McQuay IM 971-1 5

Mechanical Installation

Filter Replacement

This unit is provided with 6 - 18” × 18” × 2” disposable filters. When replacing filters, ensure they are inserted fully to the back to prevent bypass.

Clearances

The following minimum clearances must be observed for proper unit performance and serviceability (also see Figure 3).

Table 2: Recommended Clearances

Recommended

Clearance

48” A- Fr ont 18” B - Condenser Coil 18” C - Duct Side 18” D - Evaporator End 60” E - Above

*Without Economizer. 48” With Economizer

Figure 3: Clearances

Location

Figure 4: Flat Rooftop Installation, With Attic or Drop Ceiling Distributing System

Rooftop Installation

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

roof structure is adequate to support the weight involved. (See Electrical & Physical Tables in this manual.) THIS

IS VERY IMPORTANT AND THE INSTALLER'S RESPONSIBILITY.

2 For rigging and roofcurb details, see Figure 5 through

Figure 7.

3 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, block off supply and return air openings to prevent excessive condensation.

Ductwork

The installing contractor should fabricate ductwork in accordance with local codes. Use industry manuals 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.

DANGER

Never connect return ductwork to any other heat producing device such as fireplace insert, stove, etc. Unauthorized use of such devices may result in fire, carbon monoxide poisoning, explosion, personal injury, property damage or death.

Place the unit as close to the conditioned space as possible allowing clearances as indicated. Run ducts as directly as possible to supply and return outlets. Use of non-flammable weatherproof flexible connectors on both supply and return connections at unit to reduce noise transmission is recommended.

6 McQuay IM 971-1

Mechanical Installation

On ductwork exposed to outside 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. 1/2" to 1" thick insulation is usually sufficient for ductwork inside the air conditioned space.

Provide balancing dampers for each branch duct in the supply system. Properly support ductwork from the structure.

IMPORTANT: In the event that the return air ducts must be run through an “unconfined” space containing other fuel burning equipment, it is imperative that the user be informed against future changes in construction which might change this to a “confined space.” Also, caution the user against any future installation of additional equipment (such as power ventilators), within the existing unconfined and/or confined space which might create a negative pressure within the vicinity of other solid, liquid, or gas fueled units.

Return Air

DANGER

Never allow products of combustion or the flue products to enter the return air ductwork, or the circulating air supply. All return ductwork must be adequately sealed and secured to the furnace with sheet metal screws and joints must be taped. All other duct joints must be secured with approved connections and sealed airtight. Failure to prevent products of combustion from being circulated into the living space can create potentially hazardous conditions, including carbon monoxide poisoning that could result in personal injury or death.

Figure 5: Rigging Detail

A074403

Capacity Tons [kW]

7.5-12.5 [26.4-44.0]

Corner Weights by Percentage

A B C D

33% 27% 17% 23%

Figure 6: Shipping Board Removal

Illustration

ST-A0744-03

[ ] Designates Metric Conversions

Figure 7: Roofcurb

Remove Shipping Boards Before Installing Unit

McQuay IM 971-1 7

Mechanical Installation

Gas Supply, Condensate Drain

Gas Connection

IMPORTANT: Connect this unit only to gas supplied by a commercial utility.

1 Install gas piping in accordance with local codes and

regulations of the local utility company. In the absence of local codes, the installation must conform to the specifications of the National Fuel Gas Code, ANSI Z223.1 - latest edition.

Note: The use of flexible gas connectors is not permitted.

Connect the gas line to the gas valve supplied with unit.

Routing can be through the gas pipe opening shown in

Figure 26, page 34 or through the base as shown in Figure 1 1, page 12.

3 Size the gas line to the furnace adequate enough to

prevent undue pressure drop and never less than 1/2".

4 Install a drip leg or sediment trap in the gas supply line

as close to the unit as possible.

5 Install an outside ground joint union to connect the gas

supply to the control assembly at the burner tray.

6 Gas valves have been factory installed. Install a manual

gas valve where local codes specify a shut-off valve outside the unit casing (Figure 8).

7 Make sure piping is tight. A pipe compound resistant

to the action of liquefied petroleum gases must be used at all threaded pipe connections.

Figure 8: Suggested Gas Piping

IMPORTANT: Disconnect the furnace and its individual shutoff valve from the gas supply piping during any pressure testing of that system at test pressures in excess of 1/2 pound per square inch gauge or isolate the system from the gas supply piping system by closing its individual manual shutoff valve during any pressure testing of this gas supply system at

pressures equal to or less than 1/2 PSIG.

DANGER

Never test for gas leaks with an open flame. It can cause an explosion or fire resulting in property damage, personal injury or death. Use a commercially available soap solution made specifically for the detection of leaks to check all connections as specified in the “Mechanical Installation” section of these instructions.

IMPORTANT: Check the rating plate to make certain the unit is equipped to burn the type of gas supplied. Care should be taken after installation of th is equipment that the gas control valve not be subjected to high gas supply line pressure.In making gas connections, avoid strains as they may cause noise and damage the controls. A backup wrench is required to be

used on the valve to avoid damage.

Table 3: Gas Pipe Capacity Table (Cu. Ft./Hr.)

Nominal Iron Pipe Size

1/2” 132 92 73 63 56 50 46 43 3/4” 278 190 152 130 115 105 96 90 1” 520 350 285 245 215 195 180 170 1-1/4” 1,050 730 590 500 440 400 370 350 1-1/2” 1,600 1,100 890 760 670 610 560 530

10 20 30 40 50 60 70 80

Equivalent Length of Pipe, Feet

IMPORTANT: Any additions, changes or conversions

required for the furnace to satisfactorily meet the application should be made by a qualified installer, service agency or the gas supplier, using factoryspecified or approved parts. In the commonwealth of Massachusetts, installation must be performed by a licensed plumber or gas fitter for appropriate fuel.

The capacities of gas pipe of different diameters and lengths in cu.ft. per hr. with pressure drop of 0.3 in. and specific gravity of 0.60 (natural gas) are shown in Table 1.

After determining the pipe length, select the pipe size which will provide the minimum cubic feet per hour required for the gas input rating of the furnace. By formula:

Cu. Ft. per Hr. Required =

Gas Input of Furnace (BTU/Hr)

Heating Value of Gas (BTU/Ft3)

The gas input of the furnace is marked on the furnace rating

plate. The heating value of the gas (BTU/Ft

) may be determined by consulting the local natural gas utility or the LP gas supplier.

8 McQuay IM 971-1

Mechanical Installation

LP Conversion

Use a properly calibrated manometer gauge for accurate gas pressure readings.

DANGER

Only small variations in the gas flow should be made by means of the pressure regulator adjustment. Furnaces

This unit is equipped at the factory for use with natural gas only. Conversion to LP gas requires a special kit supplied by the distributor or manufacturer. Mailing addresses are listed on the furnace rating plate, parts list and warranty. Failure to use the proper conversion kit can cause fire, carbon monoxide poisoning, explosion, personal injury, property damage, or death.

functioning on LP gas must be set by means of the tank or branch supply regulators. The furnace manifold pressure should be set at 10" W.C. at the gas control valve.

To adjust the pressure regulator, remove the regulator cap and turn the adjustment screw clockwise to increase pressure or counterclockwise to decrease pressure. Then replace the

regulator cap securely.

Convert the unit to use liquefied petroleum (LP) gas by replacing with the gas valve supplied in the conversion kit.

Any necessary major changes in the gas flow rate should be made by changing the size of the burner orifices. To change

The LP gas valve maintains the proper manifold pressure for LP gas. The correct burner LP orifices are included in the kit.

IMPORTANT: To remove the natural gas valve, remove the four screws securing the manifold pipe to the burner tray. Remove the manifold pipe with gas valve attached.

Note: Order the correct LP conversion kit from the furnace

manufacturer. See Conversion Kit Index shipped with unit for proper LP kit number. Furnace conversion to LP gas must be performed by a qualified technician.

orifice spuds, shut off the manual main gas valve and remove the gas manifold.

For elevations up to 2,000 feet, rating plate input ratings apply. For high altitudes (elevations over 2,000 ft.), contact McQuay Parts. see conversion kit index 92-21519-XX for derating and orifice spud sizes.

Check of input is important to prevent over-firing of the furnace beyond its design-rated input. NEVER SET INPUT ABOVE THAT SHOWN ON THE RATING PLATE. Use the

Adjusting or Checking Furnace Input

Gas Type Line pressure (in wc) Manifold Pressure

Natural Gas 5 - 10.5 3.5

LP Gas 11-13 10

following table or formula to determine input rate.

Cu. Ft./Hr. Required =

Heating Value of Gas (BTU/CuFt) x 3600

Time in Seconds for 1 Cu. Ft. of Gas

Supply and manifold pressure taps are located on the gas valve body 1/8" N.P.T. and on the manifold.

Table 4: Meter Time In Minutes And Seconds For Normal Input Rating Of Furnaces Using Natural Or Lp Gas

Input

Btu/hr

40,000

60,000

80,000

100,000

Meter Size

Cu. Ft.

One

Ten

One

Ten

One

Ten

One

Ten

900 1000 1040 1100 2500

Min. Sec. Min. Sec. Min. Sec. Min. Sec. Min. Sec.

13

0 9

0 6

0 5

21 30

0 41 45

33 24

Table 5: LP Gas Pipe Capacity (Cubic feet per hour)

Nominal Iron Pipe

Size, Inches

1/2 275 189 152 129 114 103 96 89 83 78 3/4 567 393 315 267 237 217 196 182 173 162

1 1,071 732 590 504 448 409 378 346 322 307 1-1/4 2,205 1,496 1,212 1039 913 834 771 724 677 630 1-1/2 3,307 2,299 1,858 1,559 1,417 1,275 1,181 1,086 1,023 976

2 6,221 4,331 3,465 2,992 2,646 2,394 2,205 2,047 1,921 1,811

10 20 30 40 50 60 70 80 90 100

Heating Value Of Gas Btu Per Cu. Ft.

15

10

0 7

0 6

0 0

0 10 324

45 30

0

15

0 7

0 6

34 36

47 48

38 15

Length of Pipe, Feet

16

0 8

0 6

39 30

6 0

50 15

40 36

45 30

53 45

Start the furnace and measure the time required to burn one cubic foot of gas. Prior to checking the furnace input, make certain that all other gas units are shut off, with the exception of pilot burners. Time the meter with only the furnace in operation.

IMPORTANT NOTE FOR ALTITUDES ABOVE 2,000 FEET (610 METERS): The main burner orifices in your

furnace and in these kits are sized for the nameplate input and intended for installations at elevations up to 2,000 feet in the USA or Canada, or for elevations of 2,000 - 4,500 feet (610 -

McQuay IM 971-1 9

Mechanical Installation

1,373 meters) in Canada if the unit has been derated at the factory. For elevations above 2,000 feet (610 meters) IN THE USA ONLY (see ANSIZ223.1), the burner orifices must be sized to reduce the input 4% for each 1,000 feet (305 meters) above sea level.

NOTICE: Derating of the heating input for high altitude in the field is unlawful in Canada (refer to CAN/CGA 2.17). Units installed in altitudes greater than 2,000 feet (610 meters) must be shipped from the factory or from a factory authorized conversion station with the heating input derated by 10% so as to operate properly in altitudes from 2,000 - 4,500 feet (610 1,373 meters).

Condensate Drain

The condensate drain connection of the evaporator is threaded 1" nominal iron pipe. IMPORTANT: Install a condensate trap to ensure proper condensate drainage. See Figure 9.

Figure 9: Condensate Drain

10 McQuay IM 971-1

Electrical Installation

Wiring

Power Supply

DANGER

Power supply to the unit must be disconnected before making field connections. To avoid electrical shock, personal injury or death, be sure to rigorously adhere to field wiring procedures regarding proper lockout and tagout of components.

1 All wiring should be made in accordance with the

National Electrical Code. Consult the local power company to determine the availability of sufficient power to operate the unit. Check the voltage at power supply to make sure it corresponds to the unit's RATED VOLTAGE REQUIREMENT. Install a branch circuit disconnect near the rooftop, in accordance with the N.E.C., C.E.C. or local codes.

2 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 nameplate. On three phase units, phases must be balanced within 3%.

3 For branch circuit wiring (main power supply to unit

disconnect), the minimum wire size for the length of run can be determined fromTable 6 using the circuit ampacity found on the unit rating plate.

4 For through the base wiring entry reference Figure 18.

All fittings and conduit are field supplied for this application. Reference the chart with Figure 26, page 34

for proper hole and conduit size.

Table 6: Minimum Wire Sizes

Unit

MCA

20 10 8 6 4 4 4 25 10 8 6 4 4 3 30 8 6 4 4 3 2 35 8 6 4 3 2 1 40 8 6 4 3 2 1 45 8 4 3 2 1 1/0 50 6 4 3 2 1 1/0 60 6 4 2 1 1/0 2/0 70 4 3 2 1/0 2/0 3/0 80 4 3 1 1/0 2/0 3/0 90 3 2 1/0 2/0 3/0 4/0

100 3 2 1/0 2/0 3/0 4/0

110 2 1 2/0 3/0 4/0 250

125 1 1 2/0 3/0 4/0 25

Note:

50 10 0 150 200 250 300

Supply Wire Length in Feet

For branch circuit wiring (main power supply to unit

disconnect), the minimum wire size for the length of run can be determined from this table using the circuit ampacity found on the unit rating plate. From the unit disconnect to unit, the smallest wire size allowable in

Table 6 may be used, as the disconnect must be in sight

of the unit.

2 Wire size based on 75°C rated wire insulation for 1%

voltage drop.

3 For more than 3 conductors in a raceway or cable, see the

N.E.C. (C.E.C. in Canada) for derating the ampacity of each conductor.

IMPORTANT: This unit is approved for use with copper conductors only connected to unit contactor.

Warranty will be voided if aluminum wire is connected to unit contactor.

Figure 10: Recommended Branch Circuit Disconnect Location

Disconnect

McQuay IM 971-1 11

Electrical Installation

Figure 1 1: Base Entry Locations

WIRE FROM ZONE THERMOSTAT

TO BE ROUTED BEHIND SHIELD

INTEGRATED FURNACE

CONTROL LOW VOLTAGE

POWER WIRES

FROM DISCONNECT

TO CONTACTOR

AS SHOWN.

AND CONNECTED TO

TERMINAL STRIP

MAIN GAS VALVE

EXTERNAL PIPING SUPPLIED BY OTHERS

EXTERNAL GAS VALVE

CONDUIT NUT

BOTTOM GAS ENTRY

POWER WIRES

TO DISCONNECT

WIRE FROM

ZONE THERMOSTAT

TO BE ROUTED BEHIND

SHIELD AS SHOWN.

SIZED PER CHART

MIN. CIRCUIT AMPACITY

STRAIGHT CONDUIT

CUT HOLE

WIRE SIZE FROM

FITTING SIZED

PER CHART

CONDUIT FROM

POWER SUPPLY

SIZED PER CHART

CONTROL VOLTAGE KNOCK-OUT

WIRE FROM ZONE THERMOSTAT

STRAIGHT CONDUIT FITTING

CONDUIT FROM ZONE THERMOSTAT

Table 7: Recommended Wire Sizes

Wire Size, AWG 14 12 10 8 6 4 3 2 1 0 00 000

Conduit Size

Hole Size

Hook-Up

To wire unit, refer to the following hook-up diagram. Refer to

Figure 11, page12 and Figure 26, page 34 for location of

wiring entrances. Wiring to be done in the field between the unit and devices not attached to the unit, or between separate devices which are field installed and located, shall conform

1/2” 1/2” 1/2” 3/4” 1” 1” 1-1/4” 1-1/4” 1-1/2” 1-1/2” 2” 2” 7/8” 7/8” 7/8” 1-31/32” 1-23/64” 1-23/64” 1-23/32” 1-23/32” 1-31/32” 1-31/32” 2-15/32” 2-15/32”

Customer Supplied Thermostat

The customer supplied room thermostat must be compatible with the spark ignition control on the unit. Generally, all thermostats that are not of the “current robbing” type are compatible with the integrated furnace control. The low

voltage wiring should be sized as shown in Table 8. with the temperature limitation for Type T wire [63°F rise (35°C)] when installed in accordance with the manufacturer's instructions.

Internal Wiring

A diagram of the internal wiring of this unit is located on the inside of control access panel and in this manual. If any of the original wire as supplied with the unit must be replaced, the wire gauge and insulation must be same as original wiring.

208 Volt Applications

Transformer is factory wired for 230 volts on 208/230 volt models and must be changed for 208 volt applications. See unit wiring diagram for 208 volt wiring.

Table 8: Field Wire Size for 24 Volt Thermostat

Solid Copper Wire, AWG

3.0

2.5

2.0

Thermostat

Load Amps

Note: (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.

50 100 150 200 250 300

Length of Run -Feet (1)

10 10

Install the room thermostat in accordance with the instruction

sheet packed in the box with the thermostat.

See Figure 13, page 14 for an example of a typical customer

supplied wiring diagram.

12 McQuay IM 971-1

Electrical Installation

Optional Factory Supplied Thermostat

Figure 12: Optional Thermostat

The optional factory supplied, touch screen, commercial setback digital thermostat (Figure 12) uses microcomputer technology to provide precise time and temperature control. This thermostat offers the flexibility to design heating and cooling programs that fit building needs (Table 9). This

thermostat is adaptable to most residential 24 volt forced air multi-stage systems with electric or fossil fuel auxiliary and is the ultimate for comfort, convenience, and performance.

See Figure 14, page 14 for an optional factory supplied thermostat wiring diagram.

Table 9: Optional Factory Supplied Thermostat Specifications

Electrical Rating Single Stage:

Electrical Rating Staging:

Terminal Load:

Setpoint Range:

Anticipation, Heating:

Anticipation, Cooling:

Rated Differential Single Stage:

Rated Differential Staging:

Operating Ambient:

Operating Humidity

Shipping Temperature Range:

Dimensions (H x W x D):

mV to 30 V (ac), NEC Class II, 50/60 Hz or DC

20 to 30 V (ac), NEC Class II

1.5 A per terminal, 2.5 A max. combined 45° to 99°F (7° to 37°C) Adjustable Adjustable Heat 0.6°F, Cool 1.2°F

Heat 0.6°F, Cool 1.2°F 32° to +105°F (0° to +41°C) 90% non-condensing max.

-4° to 150°F (-20° to 65°C)

4.6” x 5.9” x 1.2”

Table 10: Thermostat Terminal Functions

Y2 2nd Stage Compressor Y Compressor Relay GFan Relay RC Power for Cooling RH Power for Heating C Common wire from secondary side of cooling (Optional). Required for

fault indication, continuous backlight operation or remote temperature

sensor operation L Malfunction indicator for systems with malfunction connection W/E Heat Relay/Emergency Heat Relay (Stage 1) W2 2nd Stage Heat (3rd Stage Heat in HP2) Blank Blank

- Common (DC) for wired remote temperature sensor S Frequency signal from remote temperature sensor + Power (DC) to remote temperature sensor

McQuay IM 971-1 13

Electrical Installation

Wiring Diagrams

Figure 13: Typical Customer Supplied Thermostat Wiring Diagram

Figure 14: Optional Factory Supplied 7-170 Thermostat Wiring Diagram

Orange

Yellow

Green

Red

Brown

W/E

Black

C Y1GW2W1R Y2

Terminal Block

1) On 3 to 5 ton units, a terminal block is not supplied. Use a wirenut to extend from the leads provided in the unit to the thermostat. W1, W2, and Y2 are optional depending upon the size and selected options of the unit. Colors shown above are typical for the MPS I.

2) For wiring with DDC control option, see OM 1077 for wiring instructions.

14 McQuay IM 971-1

Electrical Installation

Figure 15: Wiring Diagram: MPS 006B – 007B, 208-230/460 Volt (Cooling Only – Single Stage)

McQuay IM 971-1 15

Electrical Installation

Figure 16: Wiring Diagram: MPS 006B – 007B, 208-230/460 Volt (Gas Heat – Single Stage)

16 McQuay IM 971-1

Figure 17: Wiring Diagram: MPS 006B – 007B, 575 Volt (Cooling Only – Single Stage)

Electrical Installation

McQuay IM 971-1 17

Electrical Installation

Figure 18: Wiring Diagram: MPS 006B – 007B, 575 V (Gas Heat – Single Stage)

18 McQuay IM 971-1

Figure 19: Wiring Diagram: MPS 008B – 012B, 208-230/460 V (Cooling Only)

Electrical Installation

McQuay IM 971-1 19

Electrical Installation

Figure 20: Wiring Diagram: MPS 008B – 012B, 208-230/460 V (Gas Heat)

20 McQuay IM 971-1

Figure 21: Wiring Diagram: MPS 008B – 012B, 575 V (Cooling Only)

Electrical Installation

McQuay IM 971-1 21

Electrical Installation

Figure 22: Wiring Diagram: MPS 008B – 012B, 575 V (Gas Heat)

22 McQuay IM 971-1

Figure 23: MPS 006F - 012F 208-230/460 V DDC Controls w/ Gas Heat

Electrical Installation

McQuay IM 971-1 23

Electrical Installation

Figure 24: MPS 006F - 012F 575 V DDC Controls w/ Gas Heat

24 McQuay IM 971-1

Figure 25: MPS 006F - 012F 208-230/460/575 V DDC Controls w/ Cooling Only

Electrical Installation

McQuay IM 971-1 25

Physical Data

Unit Capacity and Physical Data

Table 11: MPS 006B – 007B

Model

Cooling Performance

Gross cooling BTU [kW] 76,000 [22.27] 93,000 [27.25] EER/SEER

Nominal airflow/ARI airflow (cfm) [L/s] 2400/2400 [1133/1133] 3000/2775 [1416/1310] Net cooling BTU [kw] 73,000 [21.39] 90,000 [26.37] Net sensible BTU [kW] 53,900 [15.79] 63,100 [18.49] Net latent BTU [kW] 19,100 [5.6] 26,900 [7.88] Net system power kW 6.31 7.53

Compressor(s)

Type/number Scroll/1 Scroll/2

Gas Heating Performance

AFUE % 80 80 Steady stage efficiency % 81 81 No. stages 2 2 Gas connection size 1/2" 1/2" - 3/4" Heating input (BtuH) 75,000/150,000 112,500 / 225,000 Heating output (BtuH) 60,750/121,500 60,750 / 182,250 Temperature rise °F 30 - 60 40 - 70

Sound

Outdoor rating (dB) 88 88

Outdoor Coil

Fin type Louvered Louvered Tube type Rifled Rifled Tube size OD (in.) [mm] 3/8 [9.5] 0.375 [9.5] Face area (sq. ft) [sq. m] 13.5 [1.25] 27 [2.51] Rows (fpi) [fpcm] 1 / 22 [9] 1/22 [9]

Indoor Coil

Fin type Louvered Louvered Tube type Rifled Rifled Tube size OD (in.) [mm] 0.375 [9.5] 0.375 [9.5] Face area (sq. ft) [sq. m] 13.5 [1.25] 13.5 [1.25] Rows (fpi) [fpcm] 2 / 18 [7] 2/18 [7] Refrigerant control Capillary tube Drain connection (in.) [mm] 1/1 [25.4] 1/1 [25.4]

Condenser Fan

Type Propeller Propeller No. used/diameter (in.) [mm] 2/24 [609.6] 2/24 [609.6] Drive type/No. of speeds Direct/1 Direct/1 CFM [L/s] 8000 [3775] 8000 [3775] Motor hp 2 at 1/3 HP 2 at 1/3 HP Motor rpm 1075 1075

Indoor Fan

Type FC Centrifugal FC Centrifugal No. used/diameter (in.) [mm] 1/11x12 [279x305] 1/15x15 [381x381] No. motors 1 1 Motor hp 1 - 2 2 Motor rpm 1725 1725

Filter

Fin type Disposable Disposable Furnished Yes Yes No. size (in.) [mm] (6) 2x18x18 [51x457x457] (6) 2x18x18 [51x457x457]

Refrigerant

Charge oz. [g] 190.9 [5412] 107.5/110.7 [3048/3138]

Weight

Net weight lbs. [kg] 965 [438] 1053 [478] Shipping weight lbs. [kg] 1002 [455] 1090 [494]

006B 007B

11.5/NA 11.2/NA

MPS

26 McQuay IM 971-1

Physical Data

Table 12: MPS 008B – 012B

Model

Cooling Performance

Gross cooling BTU [kW] 101,000 [29.59] 123,000 [36.04] 156,000 [45.71] EER/SEER

Nominal airflow/ARI airflow (cfm) [L/s] 3200/3200 [1510/1510] 4000/3750 [1888/1770] 5000/4400 [2360/2076] Net cooling BTU [kw] 97,000 [28.42] 118,000 [34.57] 148,000 [43.36] Net sensible BTU [kW] 74,000 [21.68] 88,800 [26.02] 107,600 [31.53] Net latent BTU [kW] 23,000 [6.74] 29,200 [8.56] 40,400 [11.84] Net system power kW 8.59 10.49 13.39

Compressor(s)

Type/number Scroll/2 Scroll/2 Scroll/2

Gas Heating Performance

AFUE % 80 80 80 Steady stage efficiency % 81 81 81 No. stages 2 2 2 Gas connection size 1/2" - 3/4" 1/2" - 3/4" 1/2" - 3/4" Heating input (BtuH) 112,500/225,000 112,500 / 225,000 150,000 / 252,000 Heating output (BtuH) 91,125/182,250 60,750 / 182,250 121,500 / 204,000 Temperature rise °F 40 - 70 15 - 55 15 - 55

Sound

Outdoor rating (dB) 88 88 88

Outdoor Coil

Fin type Louvered Louvered Louvered Tube type Rifled Rifled MicroChannel Tube size OD (in.) [mm] 0.375 [9.5] 0.375 [9.5] 1 [25.4] Face area (sq. ft) [sq. m] 27 [2.51] 27 [2.51] 27 [2.51] Rows (fpi) [fpcm] 2/18 [7] 2/22 [9] 2 / 20 [8]

Indoor Coil

Fin type Louvered Louvered Louvered Tube type Rifled Rifled Rifled Tube size OD (in.) [mm] 0.375 [9.5] 0.375 [9.5] 0.375 [9.5] Face area (sq. ft) [sq. m] 13.5 [1.25] 13.5 [1.25] 13.5 [1.25] Rows (fpi) [fpcm] 2/18 [7] 3/18 [7] 4 / 15 [6] Refrigerant control TX valves TX valves TX valves Drain connection (in.) [mm] 1/1 [25.4] 1/1 [25.4] 1/1 [25.4]

Condenser Fan

Type Propeller Propeller Propeller No. used/diameter (in.) [mm] 2/24 [609.6] 2/24 [609.6] 2/24 [609.6] Drive type/No. of speeds Direct/1 Direct/1 Direct/1 CFM [L/s] 8000 [3775] 8000 [3775] 8000 [3775] Motor hp 2 at 1/3 HP 2 at 1/3 HP 2 at 1/2 HP Motor rpm 1075 1075 1075

Indoor Fan

Type FC Centrifugal FC Centrifugal FC Centrifugal No. used/diameter (in.) [mm] 15x15 [381x381] 15x15 [381x381] 1/15x15 [381x381] No. motors 1 1 1 Motor hp 2 - 3 2 - 3 3 - 5 Motor rpm 1725 1725 1725

Filter

Fin type Disposable Disposable Disposable Furnished Yes Yes Yes No. size (in.) [mm] (6) 2x18x18 [51x457x457] (6) 2x18x18 [51x457x457] (6) 2x18x18 [51x457x457]

Refrigerant

Charge oz. [g] 154.4/166.6 [4377/4723] 172.8/180.8 [4899/5126] 159.2/156 [4513/4423]

Weight

Net weight lbs. [kg] 1095 [497] 1156 [524] 1230 [558] Shipping weight lbs. [kg] 1002 [455] 1193 [541] 1132 [513]

008B 010B 012B

11.2/NA 11.2/NA 11/NA

MPS

McQuay IM 971-1 27

Electrical Data

Compressor and Condenser Motor

Table 13: Compressor and Condenser Motor Data – 208/230 Volt

Electrical Data (208/230 V)*

Data

Compressor Motor

No. 1 2 Phase 3 RPM 3450 HP, Compressor 1 5 3-1/4 4 5 6 Amps (RLA), Comp. 1 22.9 13.1 17.9 17.8 25 Amps (LRA), Comp. 1 115 83.1 91 110 149 HP, Compressor 2 N/A 3-1/4 4 5 6 Amps (RLA), Comp. 2 N/A 13.1 17.9 25 25 Amps (LRA), Comp. 2 N/A 83.1 91 110 149

Condenser Motor

No. 2 Phase 1 HP 1/3 Amps (FLA, each) 1.2/1.2 Amps (LRA, each) 4.7/4.7

Note: *Unit operating voltage range is 187 - 253

MPS

006B

MPS 007B

MPS 008B

MPS

010B

MPS

012B

Table 14: Compressor and Condenser Motor Data – 460 Volt

Electrical Data (460 V)*

Data

Compressor Motor

No. 1 2 Phase RPM 3450 HP, Compressor 1 5 3-1/4 4 5 6 Amps (RLA), Comp. 1 10.7 6.1 7.9 8.6 11.8 Amps (LRA), Comp. 1 75 41 46 52 75 HP, Compressor 2 N/A 3-1/4 4 5 6 Amps (RLA), Comp. 2 N/A 6.1 7.9 8.6 11.8 Amps (LRA), Comp. 2 N/A 41 46 52 75

Condenser Motor

No. 2 Phase 1 HP 1/3 Amps (FLA, each) 1,4 Amps (LRA, each) 2,4

Note: *Unit operating voltage range is 414 - 506

MPS

006B

MPS 007B

MPS 008B

MPS

010B

MPS

012B

28 McQuay IM 971-1

Table 15: Compressor and Condenser Motor Data – 575 Volt

Electrical Data (575 V)*

Data

Compressor Motor

No. 1 2 Phase 3 RPM 3450 HP, Compressor 1 5 3-1/4 4 5 6 Amps (RLA), Comp. 1 8.5 4.4 6.2 6.4 8.6 Amps (LRA), Comp. 1 54 33 37 38.9 54 HP, Compressor 2 N/A 3-1/4 4 5 6 Amps (RLA), Comp. 2 N/A 4.4 6.2 6.4 8.6 Amps (LRA), Comp. 2 N/A 33 37 38.9 54

Condenser Motor

No. 2 Phase 1 HP 1/3 Amps (FLA, each) 1,0 Amps (LRA, each) 1,8

Note: *Unit operating voltage range is 518 - 632

MPS 006B

MPS

007B

MPS

008B

MPS

010B

MCA and MCOP

Electrical Data

MPS

012B

Table 16: Unit MCA and MCOP Data

Vol tag e

MPS Model

208/230 460 575

Low* High Low* High Low* High

006B

007B

008B

010B

012B

Note: *Low static option is a direct drive motor for models 003 and 004

MCA 37.0 37.0 18.0 18.0 14.0 14.0

MCOP 50.0 50.0 25.0 25.0 20.0 20.0

MCA 42.0 47.0 21.0 24.0 16.0 20.0

MCOP 60.0 70.0 30.0 35.0 20.0 25.0

MCA 49.0 54.0 23.0 26.0 19.0 24.0

MCOP 60.0 60.0 25.0 30.0 20.0 30.

MCA 49.0 54.0 25.0 28.0 19.0 24.0

MCOP 60.0 60.0 30.0 35.0 20.0 30.0

MCA 67.0 71.0 33.0 36.0 26.0 28.0

MCOP 80.0 90.0 40.0 45.0 35.0 35.0

McQuay IM 971-1 29

Electrical Data

Auxiliary Heater Data

Table 17: Auxiliary Heater Kits Characteristics and Application: 208/240V - 3 Phase

Unit Model

Number

MPS-

006B

Low and High

Static Drives

007B

Low

Static Drive

007B

High

Static Drive

008B

Low

Static Drive

008B

High

Static Drive

010B

Low

Static Drive

010B

High

Static Drive

012B

Low

Static Drive

Heater Kit Model No.

RXJJ-

NONE — — 37/37 50/50 CC10C 7.2/9.6 20.0/23.1 37/37 50/50 CC15C 10.8/14.4 30.0/34.6 45/51 50/60 CC20C 14.4/19.2 40.0/46.2 57/65 60/70 CC30C 21.6/28.8 60.0/69.3 82/94 90/1 00

NONE — — 42/42 60/60 CC10C 7.2/9.6 20.0/23.1 42/42 60/60 CC15C 10.8/14.4 30.0/34.6 48/54 60/60 CC20C 14.4/19.2 40.0/46.2 60/68 60/70 CC30C 21.6/28.8 60.0/69.3 85/97 90/1 00 CC40C 28.8/38.4 80.1/92.4 111/126 125/150

NONE — — 47/47 70/70 CC10C 7.2/9.6 20.0/23.1 47/47 70/70 CC15C 10.8/14.4 30.0/34.6 54/60 70/70 CC20C 14.4/19.2 40.0/46.2 67/74 70/80 CC30C 21.6/28.8 60.0/69.3 92/1 03 100/110 CC40C 28.8/38.4 80.1/92.4 117/132 125/150

NONE — — 49/49 60/60 CC10C 7.2/9.6 20.0/23.1 49/49 60/60 CC15C 10.8/14.4 30.0/34.6 49/54 60/60 CC20C 14.4/19.2 40.0/46.2 60/68 60/70 CC30C 21.6/28.8 60.0/69.3 85/97 90/100 CC40C 28.8/38.4 80.1/92.4 111/126 125/150

NONE — — 54/54 60/60 CC10C 7.2/9.6 20.0/23.1 54/54 60/60 CC15C 10.8/14.4 30.0/34.6 54/60 60/60 CC20C 14.4/19.2 40.0/46.2 67/74 70/80 CC30C 21.6/28.8 60.0/69.3 92/103 100/110 CC40C 28.8/38.4 80.1/92.4 117/132 125/150

NONE — — 49/49 60/60 CC10C 7.2/9.6 20.0/23.1 49/49 60/60 CC15C 10.8/14.4 30.0/34.6 49/54 60/60 CC20C 14.4/19.2 40.0/46.2 60/68 60/70 CC30C 21.6/28.8 60.0/69.3 85/97 90/100 CC40C 28.8/38.4 80.1/92.4 111/126 125/150 CC50C 36.1/48.0 100.1/115.5 136/155 150/175

NONE — — 54/54 60/60 CC10C 7.2/9.6 20.0/23.1 54/54 60/60 CC15C 10.8/14.4 30.0/34.6 54/60 60/60 CC20C 14.4/19.2 40.0/46.2 67/74 70/80 CC30C 21.6/28.8 60.0/69.3 92/103 100/110 CC40C 28.8/38.4 80.1/92.4 117/132 125/1 50 CC50C 36.1/48.0 100.1/115.5 142/161 150/175

NONE — — 67/67 80/80 CC10C 7.2/9.6 20.0/23.1 67/67 80/80 CC15C 10.8/14.4 30.0/34.6 67/67 80/80 CC20C 14.4/19.2 40.0/46.2 69/77 80/80 CC30C 21.6/28.8 60.0/69.3 94/106 100/110 CC40C 28.8/38.4 80.1/92.4 119/135 125/1 50 CC50C 36.1/48.0 100.1/115.5 144/164 150/175

Heater Kw

@ 208/240 V/

3 Phase

Heater Kit Fla

Unit Min. Ckt.

Ampacity

Max. Fuse Or Ckt. Bkr. Size

(Ckt. Bkr. Must Be

HACR Type For USA)

30 McQuay IM 971-1

Table 17: Auxiliary Heater Kits Characteristics and Application: 208/240V - 3 Phase

Unit Model

Number

MPS-

012B High

Static Drive

Heater Kit Model No.

RXJJ-

NONE — — 71/71 90/90 CC10C 7.2/9.6 20.0/23.1 71/71 90/90 CC15C 10.8/14.4 30.0/34.6 71/71 90/90 CC20C 14.4/19.2 40.0/46.2 74/82 90/90 CC30C 21.6/28.8 60.0/69.3 99/111 100/125 CC40C 28.8/38.4 80.1/92.4 124/139 125/150 CC50C 36.1/48.0 100.1/115.5 149/168 150/175

Heater Kw

@ 208/240 V/

3 Phase

Heater Kit Fla

Unit Min. Ckt.

Ampacity

Table 18: Auxiliary Heater Kits Characteristics and Application: 480V - 3 Phase

Unit Model

Number

MPS-

006B

Low and High

Static Drive

007B

Low

Static Drive

007B High

Static Drive

008B

Low

Static Drive

008B High

Static Drive

010B

Low

Static Drive

010B High

Static Drive

Heater Kit Model No.

RXJJ-

NONE — — 18 25 CC10D 9.6 11.5 18 25 CC15D 14.4 17.3 26 30 CC20D 19.2 23.1 33 35 CC30D 28.8 34.6 47 50

NONE — — 21 30 CC10D 9.6 11.5 21 30 CC15D 14.4 17.3 27 30 CC20D 19.2 23.1 34 35 CC30D 28.8 34.6 49 50 CC40D 38.4 46.2 63 70

NONE — — 24 35 CC10D 9.6 11.5 24 35 CC15D 14.4 17.3 34 35 CC20D 19.2 23.1 45 45 CC30D 28.8 34.6 57 60 CC40D 38.4 46.2 68 70

NONE — — 23 25 CC10D 9.6 11.5 23 25 CC15D 14.4 17.3 27 30 CC20D 19.2 23.1 34 35 CC30D 28.8 34.6 49 50 CC40D 38.4 46.2 63 70

NONE — — 26 30 CC10C 9.6 11.5 26 30 CC15D 14.4 17.3 31 35 CC20D 19.2 23.1 38 40 CC30D 28.8 34.6 52 60 CC40D 38.4 46.2 67 70

NONE — — 25 30 CC10D 9.6 11.5 25 30 CC15D 14.4 17.3 27 30 CC20D 19.2 23.1 34 35 CC30D 28.8 34.6 49 50 CC40D 38.4 46.2 63 70 CC50D 48.0 57.7 78 80

NONE — — 28 35 CC10D 9.6 11.5 28 35 CC15D 14.4 17.3 31 35 CC20D 19.2 23.1 38 40 CC30D 28.8 34.6 52 60 CC40D 38.4 46.2 67 70 CC50D 48.0 57.7 81 90

Heater Kw

@ 480V

Heater Kit Fla

Unit Min. Ckt.

Ampacity

Electrical Data

Max. Fuse Or Ckt. Bkr. Size

(Ckt. Bkr. Must Be

HACR Type For USA)

Max. Fuse Or Ckt. Bkr. Size

(Ckt. Bkr. Must Be

HACR Type For USA)

McQuay IM 971-1 31

Electrical Data

Table 18: Auxiliary Heater Kits Characteristics and Application: 480V - 3 Phase

Unit Model

Number

MPS-

012B

Low

Static Drive

012B

High

Static Drive

Table 19: Auxiliary Heater Kits Characteristics and Application: 600V - 3 Phase

Unit Model

Number

MPS-

006B

Low and High

Static Drive

007B

Low

Static Drive

007B

High

Static Drive

008B

Low

Static Drive

008B

High

Static Drive

010B

Low

Static Drive

Heater Kit Model No.

RXJJ-

NONE — — 33 40 CC10D 9.6 11.5 33 40 CC15D 14.4 17.3 33 40 CC20D 19.2 23.1 38 40 CC30D 28.8 34.6 52 60 CC40D 38.4 46.2 67 70 CC50D 48.0 57.7 81 90

NONE — — 36 45 CC10D 9.6 11.5 36 45 CC15D 14.4 17.3 36 45 CC20D 19.2 23.1 42 45 CC30D 28.8 34.6 56 60 CC40D 38.4 46.2 71 80 CC50D 48.0 57.7 85 90

Heater Kit Model No.

RXJJ-

NONE — — 14 20 CC10Y 9.6 9.2 14 20 CC15Y 14.4 13.9 20 20 CC20Y 19.2 18.5 26 30 CC30Y 28.8 27.7 37 40

NONE — — 16 20 CC10Y 9.6 9.2 17 20 CC15Y 14.4 13.9 23 25 CC20Y 19.2 18.5 29 30 CC30Y 28.8 27.7 40 40 CC40Y 38.4 37.0 52 60

NONE — — 20 25 CC1 0Y 9.6 9.2 22 25 CC15Y 14.4 13.9 28 30 CC20Y 19.2 18.5 34 35 CC30Y 28.8 27.7 45 45 CC40Y 38.4 37.0 57 60

NONE — — 19 20 CC10Y 9.6 9.2 19 20 CC15Y 14.4 13.9 23 25 CC20Y 19.2 18.5 29 30 CC30Y 28.8 27.7 40 40 CC40Y 38.4 37.0 52 60

NONE — — 24 30 CC1 0Y 9.6 9.2 24 25 CC15Y 14.4 13.9 28 30 CC20Y 19.2 18.5 34 35 CC30Y 28.8 27.7 45 45 CC40Y 38.4 37.0 57 60

NONE — — 19 20 CC10Y 9.6 9.2 19 20 CC15Y 14.4 13.9 23 25 CC20Y 19.2 18.5 29 30 CC30Y 28.8 27.7 40 40 CC40Y 38.4 37.0 52 60 CC50Y 48.0 46.2 63 70

Heater Kw

@ 480V

Heater Kw

@ 600V

Heater Kit Fla

Unit Min. Ckt.

Ampacity

Unit Min. Ckt.

Ampacity

Max. Fuse Or Ckt. Bkr. Size

(Ckt. Bkr. Must Be

HACR Type For USA)

Max. Fuse Or Ckt. Bkr. Size

(Ckt. Bkr. Must Be

HACR Type For USA)

32 McQuay IM 971-1

Table 19: Auxiliary Heater Kits Characteristics and Application: 600V - 3 Phase

Unit Model

Number

MPS-

010B High

Static Drive

012B

Low

Static Drive

012B

High

Static Drive

Heater Kit Model No.

RXJJ-

NONE — — 24 30

CC1 0Y 9.6 9.2 24 30

CC15Y 14.4 13.9 28 30 CC20Y 19.2 18.5 34 35 CC30Y 28.8 27.7 45 45 CC40Y 38.4 37.0 57 60 CC50Y 48.0 46.2 68 70

NONE — — 28 35

CC1 0Y 9.6 9.2 28 35

CC15Y 14.4 13.9 28 35 CC20Y 19.2 18.5 34 35 CC30Y 28.8 27.7 45 45 CC40Y 38.4 37.0 57 60 CC50Y 48.0 46.2 68 70

NONE — — 28 35

CC1 0Y 9.6 9.2 28 35

CC15Y 14.4 13.9 28 35 CC20Y 19.2 18.5 34 35 CC30Y 28.8 27.7 45 45 CC40Y 38.4 37.0 57 60 CC50Y 48.0 46.2 68 70

Heater Kw

@ 600V

Heater Kit Fla

Unit Min. Ckt.

Ampacity

Electrical Data

Max. Fuse Or Ckt. Bkr. Size

(Ckt. Bkr. Must Be

HACR Type For USA)

McQuay IM 971-1 33

Dimensional Data

Unit Dimensions

Figure 26: MPS 006B – 012B Dimensions

34 McQuay IM 971-1

Duct Dimensions

Figure 27: MPS 006B – 012B Horizontal Duct Dimensions

Dimensional Data

Curb Dimensions

Figure 28: MPS 006B – 012B Curb Dimensions

McQuay IM 971-1 35

Performance Data

Airflow Performance

Figure 29: Airflow Performance—MPS 006B

0.07

0.04

2800

0.055

[1321]

[0.014]

0.051 [0.013]

0.047 [0.012]

0.041

[0.01]

Resistance—Inches Water [kPa]

0.036 [0.009]

0.031 [0.008]

0.06

0.05

0.04

0.03

0.02

2600

[1227]

2400

[1133]

2200

[1038]

Standard Indoor Airow—CFM [L/s]

2000

[944]

1800

[849]

[0.017]

0.04

[0.015]

0.03

[0.012]

0.03

[0.01]

0.02

[0.007]

0.02

[0.005]

0.08

[0.01]

0.08

[0.01]

0.08

[0.007]

0.07

[0.007]

0.07

[0.005]

0.07

[0.005]

[0.02]

[0.017]

External Static Pressure—Inches of Water [kPa]

0.1 [.02] 0.2 [.05] 0.3 [.07] 0.4 [.10] 0.5 [.12] 0.6 [.15] 0.7 [.17] 0.8 [.20] 0.9 [.22] 1.0 [.25] 1.1 [.27] 1.2 [.30] 1.3 [.32] 1.4 [.35] 1.5 [.37]

Model MPS 006

Air

Flow

CFM [L/s]

RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W

1800 [849] — — — — — — — — 835 631 880 686 924 740 965 794 1005 847 1043 898 1079 949 1113 999 1146 1048 1177 1096 1206 1144

1900 [897] — — — — — — 808 622 854 681 899 739 941 795 982 851 1021 906 1058 960 1093 1013 1127 1065 1159 1117 1189 1167 1217 1217

2000 [944] — — — — — — 828 673 874 734 918 794 959 853 999 911 1037 968 1074 1025 1108 1080 1141 1135 1172 1189 1201 1242 1228 1293

803 663 850 727 894 790 937 853 978 914 1017 974 1055 1034 1090 1093 1124 1151 1156 1208 1186 1264 1214 1319 1241 1373

—

2100 [991] — — —

2200 [1038] — — — — 826 718 871 784 915 850 957 914 997 978 1036 1041 1072 1103 1107 1164 1140 1224 1171 1283 1201 1342 1228 1399 1254 1456

2300 [1085] — — 802 706 849 775 894 844 937 912 978 979 1017 1045 1055 1110 1091 1174 1125 1238 1157 1300 1187 1362 1216 1423 1242 1482 1267 1541

2400 [1133] — — 826 764 872 836 916 907 959 977 999 1047 1038 1115 1075 1183 1110 1249 1143 1315 1174 1380 1204 1444 1231 1507 1257 1569 1282 1630

922 967 964 1043 1005 1118 1044 1191 1081 1265 1116 1337 1149 1408 1181 1478 1211 1548 1239 1616 1265 1684 — — — —

890

813 877

831

2500 [1180] 805 751 852 826 897 900 940 973 981 1046 1021 1118 1059 1188 1095 1258 1129 1327 1162 1395 1192 1462 1221 1529 1248 1594 1273 1658 — —

2600 [1227]

1VP-50

1126 1426 1160 1503 1191 1579 1221 1654 1250 1728 1276 1802 — — — — — —

AK66 AK66

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

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

4. Drive data shown is for horizontal airow with dry coil. Add component resistance

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

RPM 1119 1072 1019 967 915 859 1267 1215 1163 1113 1064 1015

Turns Open 0 1 2 3 4 5 0 1 2 3 4 5

2700 [1274] 858 878 904 958 947 1037 989 1115 1029 1192 1067 1268 1103 1344 1137 1418 1170 1492 1201 1565 1230 1637 1257 1708 1282 1778 — — — —

2800 [1321] 886 947 931 1029 973 1110 1014 1190 1053 1270 1091 1349

Drive Package L M

NOTE: L-Drive left of bold line, M-Drive right of bold line.

Motor Sheave 1VP-44

Blower Sheave

Motor H.P. [W] 1.5 [1118.6] 1.5 [1118.6]

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

Component

COMPONENT AIR RESISTANCE, IWC

6 TON [21.1 kW]

1.02

2800

[1321]

2600

[1227]

1.00 1.01

2400

[1133]

2200

[1038]

0.98 0.99TOTAL MBH

2000

[944]

0.97

1800

[849]

[L/s]

ACTUAL—CFM

AIRFLOW CORRECTION FACTORS

6 TON [21.1 kW]

1.05

1.02

1.00

0.97

0.94SENSIBLE MBH 0.91

Wet Coil

1.01

1.000.99

0.99

POWER kW 1.000.99

Economizer

100% R.A. Damper Open

Horizontal Economizer

100% R.A. Damper Open

Horizontal Economizer

2. Resulting sensible capacity cannot exceed total capacity.

[ ] Designates Metric Conversions

NOTES: 1. Multiply correction factor times gross performance data.

100% O.A. Damper Open

NOTE: Add component resistance to duct resistance to determine total external static pressure.

DNA = Data not Available.

36 McQuay IM 971-1

Figure 30: Airflow Performance—MPS 007B

1156 2499

2414

1097 2328 11263100 [1463] 560 804 598 940 632 1010 664 713 772 1311 801 1373 830 1435 860 1497 889 1559 921 1816 950 1901 979 1987 1009 2072 1038 2157 1068 2243

1104 2392 1134 2478 1163 2563

1046 1879 1075 1965 1105 2050

1053 1944 1083 2029 1112 2114

1061 2008 1090 2093 1119 2178

1068 2072 1097 2157 1127 2243

1075 2136 1104 2221 1134 2307

RPM W RPM W RPM W

1082 2200 1112 2285 1141 2371

1090 2264 1119 2350 1148 2435

1111 2456 1141 2542 1170 2627

1119 2521 1148 2606 1178 2691

1126 2585 1155 2670 1185 2756

1133 2649 1163 2734 1192 2820

3600

3400

3200

[1699]

[1604]

[1510]

Performance Data

0.11

0.06

[0.027]

0.06

[0.025]

0.05

[0.022]

0.13

[0.015]

0.12

[0.014]

0.11

[0.012]

[0.032]

[0.030]

[0.027]

0.076

0.071

0.065

[0.019]

0.10

[0.018]

0.09

[0.016]

External Static Pressure—Inches of Water [kPa]

0.8 [.20] 0.9 [.22] 1.0 [.25] 1.1 [.27] 1.2 [.30] 1.3 [.32] 1.4 [.35] 1.5 [.37] 1.6 [.40] 1.7 [.42] 1.8 [.45] 1.9 [.47] 2.0 [.50]

1075 2307

2286 1082 2371

856 1615 886 1677 913 1923 943 2008 972 2094 1001 2179 1031 2264 1060 2350 1089 2435

3.0 [2237.1]

BK65

1VP-44

3000

2800

2600

2400

Component

COMPONENT AIR RESISTANCE, IWC

7.5 TON [26.4 kW]

3800

[1793]

[1416]

[1321]

[1227]

[1133]

1.08

1.03

0.060 [0.015]

0.055 [0.014]

Resistance—Inches Water [kPa]

0.051 [0.013]

0.047 [0.012]

Wet Coil

1.02

0.08

0.05

0.10

[0.020]

[0.011]

[0.024]

0.07

0.04

0.08

[0.017]

[0.010]

[0.020]

0.06

0.04

0.08

[0.015]

[0.009]

[0.020]

0.05

0.03

0.08

[0.007]

[0.012]

Economizer

100% R.A. Damper Open

[0.020]

Horizontal Economizer

100% R.A. Damper Open

Horizontal Economizer

100% O.A. Damper Open

NOTE: Add component resistance to duct resistance to determine total external static pressure.

DNA = Data not Available.

[1699]

1.00

1.02

3400

[1605]

1.00 1.01

1.00

3200

[1510]

0.99

0.97

3000

[1416]

0.99

0.94SENSIBLE MBH 0.91

0.98 0.99TOTAL MBH

2800

[1321]

0.97

2600

[1227]

0.99

[L/s]

ACTUAL—CFM

7.5 TON [26.4 kW]

POWER kW

2. Resulting sensible capacity cannot exceed total capacity.

NOTES: 1. Multiply correction factor times gross performance data.

[ ] Designates Metric Conversions

812

645

0.6 [.15]0.5 [.12]

RPM

729

664

540 580 582 612 711 890 740 952 770 1014 799 1076 828 1138 857 1200 887 1261 929 1538 958 1623 987 1709 1017 1794

0.3 [.07] 0.4 [.10] 0.7 [.17]

0.2 [.05]

Capacity Model MPS 007

Air

0.1 [.02]

Flow

CFM [L/s]

— — — —

RPM W RPM W RPM W RPM RPM RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W

2400 [1133]

878

945

1017

656

667

680

791

853

923

717

828

769

552 633 593 624 720 950 749 1012 778 1074 808 1136 837 1198 866 1260 895 1322 936 1602 965 1687 995 1773 1024 1858

564 687 603 635 729 1010 758 1072 787 1134 816 1196 846 1258 875 1320 914 1581 943 1666 972 1751 1002 1837 1031 1922

539 670 577 744 614 648 737 1070 766 1132 796 1194 825 1256 854 1318 883 1380 921 1645 950 1730 980 1816 1009 1901 1038 1986

— — — —

— —

2500 [1180]

2700 [1274]

2600 [1227]

1069

1129

1189

708

725

734

993

1069

1144

887

956

1024

554 733 590 801 625 660 746 1131 775 1192 804 1254 834 1316 863 1378 892 1440 928 1709 958 1794 987 1880 1016 1965 1046 2050

569 801 604 866 638 673 755 1191 784 1253 813 1315 842 1376 872 1438 906 1688 936 1773 965 1858 994 1944 1024 2029 1053 2115

— —

2800 [1321]

2900 [1369]

3000 [1416] 546 741 854 869 617 931 650 685 763 1251 792 1313 822 1375 851 1437 880 1498 913 1752 943 1837 972 1923 1002 2008 1031 2093 1060 2179

1249

743

1187

1107

1309

751

1247

1189

3200 [1510] 576 876 612 1011 646 1089 678 722 781 1371 810 1433 839 1495 868 1557 898 1619 928 1880 957 1965 987 2051 1016 2136 1045 2222

1369

760

1307

1274

3300 [1557] 592 954 628 1096 660 1168 692 731 789 1431 818 1493 848 1555 877 1617 906 1859 935 1944 965 2029 994 2115 1023 2200 1053

1 2 3 4 5 6

Turns Open 1 2 3 4 5 6

Motor Sheave 1VP-44

1157 1106 1056 1005 954 904

3. Do not operate above blower RPM shown as motor overloading will occur.

RPM 869 838 806 774 742 710

4. Do not set motor sheave below one turn open.

NOTES: 1. Factory sheave settings are shown in bold print.

AIRFLOW CORRECTION FACTORS

1430

1550

1490

769

777

786

1368

1428

1488

1306

1366

1426

Drive Package M

Blower Sheave BK90

3400 [1605] 607 1030 643 1180 673 1247 710 739 798 1491 827 1553

3500 [1652] 622 1112 658 1271 689 1344 719 748 807 1552 836 1613 865 1675 894 1737 920 1987 950 2072 979 2158 1009 2243 1038 2328 1067 2414 1097 2499

3600 [1699] 638 1202 672 1361 704 1440 728 757 815 1612 844 1674 874 1735 903 1797 928 2051 957 2136 986 2222 1016 2307 1045 2393 1075 2478 1104 2563

NOTE: L-Drive left of 1st bold line, M-Drive in middle of bold lines, N-Drive right of 2nd bold line.

Motor H.P. [W] 2.0 [1491.4]

1.01

1.05

1.02

3600

McQuay IM 971-1 37

Performance Data

Figure 31: Airflow Performance—MPS 008B

0.093 [0.023]

0.087 [0.022]

0.082 [0.020]

0.076 [0.019]

0.071 [0.018]

0.065 [0.016]

Resistance—Inches Water [kPa]

0.060 [0.015]

0.055 [0.014]

0.051 [0.013]

0.14

0.13

0.12

0.11

0.10

0.09

0.08

0.07

0.06

4200

[1982]

4000

— — — —

1082 2756 1119 2870 1147 2983

— — — —

—

1097 2994 1135 3107 — —

1084 2999 1105 3112 1144 3226 —

2885

1084

2772

1097 2157 1127 2243

1104 2221 1134 2307

1112 2285 1141 2371

1009 1901 1038 1966 1068 2072

1016 1965 1046 2050 1075 2136

1024 2029 1053 2115 1082 2200

1119 2350 1148 2435

1031 2093 1060 2179 1090 2264

RPM W RPM W

RPM W RPM W RPM W

1126 2414 — —

1038 2157 1068 2243 1097 2328

1134 2478 — —

1045 2222 1075 2307 1104 2392

1148 2606 — —

1141 2542 — —

1119 2521

2435

1060 2350 10893400 [1605]

1053 2286 1082 2371 1111 2456

1067 2414 1097 2499 1126 2585

1038 2328

1071 2478 1104 2563 1133 2649

1075 2637 1111 2751 1140 2864

[1888]

3800

[1793]

3600

[1699]

3400

[1604]

3200

[1510]

3000

[1416]

Standard Indoor Airow—CFM [L/s]

2800

[1321]

2600

[1227]

0.09

[0.035]

0.08

[0.032]

0.07

[0.030]

0.06

[0.027]

0.06

[0.025]

0.05

[0.022]

0.05

[0.020]

0.04

[0.017]

0.04

[0.015]

0.18

[0.021]

0.16

[0.020]

0.15

[0.017]

0.13

[0.015]

0.12

[0.014]

0.11

[0.012]

0.10

[0.011]

0.08

[0.010]

0.08

[0.009]

[0.044]

[0.040]

[0.036]

[0.032]

[0.030]

[0.027]

[0.024]

[0.020]

External Static Pressure—Inches of Water [kPa]

708 1009 737 1070 766 1132 796 1194 825 1256 854 1318 883 1380 921 1645 950 1730 980 1816

Capacity Model MPS 008

Air

0.1 [.02] 0.2 [.05] 0.3 [.07] 0.4 [.10] 0.5 [.12] 0.6 [.15] 0.7 [.17] 0.8 [.20] 0.9 [.22] 1.0 [.25] 1.1 [.27] 1.2 [.30] 1.3 [.32] 1.4 [.35] 1.5 [.37] 1.6 [.40] 1.7 [.42] 1.8 [.45] 1.9 [.47] 2.0 [.50]

Flow

CFM [L/s]

— — — — — — — — — —

RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W

2700 [1274]

717 1069 748 1131 775 1192 804 1254 834 1316 863 1378 892 1440 928 1709 958 1794 987 1880

725 1129 755 1191 784 1253 813 1315 842 1376 872 1438 906 1688 936 1773 965 1858 994 1944

705 1127 734 1189 763 1251 792 1313 822 1375 851 1437 880 1498 913 1752 943 1837 972 1923 1002 2008

— — — —

—

— — — — — — — — — —

— — — — —

— — — — — — — —

2800 [1321]

2900 [1369]

3000 [1416]

713 1187 743 1249 772 1311 801 1373 830 1435 860 1497 889 1559 921 1816 950 1961 979 987 1009 2072

693 1185 722 1247 761 1309 781 1371 810 1433 839 1495 868 1557 898 1619 928 1880 937 1965 987 2051 1018 2136

701 1246 731 1307 760 1369 789 1431 818 1493 848 1555 877 1617 906 1856 935 1944 968 2029 994 2115 1023 2200

— — —

—

— — —

— —

3100 [1463]

3200 [1510]

3300 [1557]

681 1244 710 1306 739 1368 769 1430 798 1491 827 1553 856 1615 886 1677 913 1923 943 2008 972 2094 1001 2179 1031 2264

673 1270 690 1304 719 1366 748 1428 777 1490 807 1552 836 1613 865 1675 894 1737 920 1987 950 2072 979 2158 1009 2243

— — — —

— —

3500 [1652]

837 1808 865 1882 933 1896 953 1956 973 2070 993 2183 1002 2297 1030 2410 1054 2524

686 1352 698 1364 728 1426 757 1488 786 1550 815 1612 844 1674 874 1735 903 1797 928 2051 957 2136 986 2222 1016 2307 1045 2393

— —

3600 [1699]

3800 [1793] 686 1443 713 1518 741 1592 768 1667 796 1741 823 1816 851 1890 878 1965 940 2003 960 2075 981 2189 1001 2302 1016 2416 1043 2529 1062 2643

3700 [1746] 672 1361 700 1435 727 1510 755 1584 782 1659 810 1733

2204 963 2318 983 2431 1003 2545 1024 2658 1056

942

2091

2064 922

864

1990

1915 836

809

1841

781

1766

1692 754

726

3. Do not operate above blower RPM shown as motor overloading will occur.

2. Re-adjustment of sheave required to achieve rated airow at ARI minimum E.S.P.

RPM 860 824 791 757 723 690 1148 1098 1049 999 949 899

Turns Open 1 2 3 4 5 6 1 2 3 4 5 6

3900 [1841] 699 1526 727 1601 754 1675 782 1750 809 1824 837 1899 864 1973 927 2015 948 2080 968 2194 988 2307 1008 2421 1029 2534 1057 2648 1069 2761 1090 2875 1127 2988 — —

4000 [1888] 713 1609 740 1683 768 1758 795 1832 823 1907 850 1981 878 2056 935 2085 955 2199 975 2312 996 2426 1016 2539 1043 2653 1070 2767 1077 2880

4100 [1935]

Drive Package L M

NOTE: L-Drive left of bold line, M-Drive right of bold line.

Motor Sheave 1VP-44 1VP-44

Blower Sheave BK90 BK65

Motor H.P. [W] 2.0 [1491.4] 3.0 [2237.1]

NOTES: 1. Factory sheave settings are shown in bold print.

Component

Wet Coil

Economizer

100% R.A. Damper Open

Horizontal Economizer

COMPONENT AIR RESISTANCE, IWC

8.5 TON [29.9 kW]

4200

4000

3800

3600

3400

3200

3000

2800

2600

[1982]

[1888]

[1793]

[1699]

[1605]

[1510]

[1416]

[1321]

[1227]

1.04

1.03

1.02

1.01

1.00

0.98 0.99TOTAL MBH

0.97

0.96

100% R.A. Damper Open

1.03

1.02

1.07

1.01

1.050.88

1.010.99

1.03

1.00

0.97

0.94 1.09

0.91

[L/s]

4. Do not set motor sheave below one turn open.

POWER kW 0.99 1.000.99

SENSIBLE MBH

ACTUAL—CFM

AIRFLOW CORRECTION FACTORS

8.5 TON [29.9 kW]

NOTES: 1. Multiply correction factor times gross performance data.

Horizontal Economizer

100% O.A. Damper Open

NOTE: Add component resistance to duct resistance to determine total external static pressure.

DNA = Data not Available.

2. Resulting sensible capacity cannot exceed total capacity.

[ ] Designates Metric Conversions

38 McQuay IM 971-1

Figure 32: Airflow Performance—MPS 010B

Performance Data

W RPM W RPM W RPM W

RPM

1.9 [.47] 2.0 [.50] 2.1 [.52] 2.2 [.55] 2.3 [.57]

1.6 [.40] 1.7 [.42] 1.8 [.45]

1138 2611 1159 2725 1179 2838

1098 2384 1118 2498

1037 2044 1057 2157 1077 2271

1146 2730 1166 2844 1186 2957

1105 2503 1125 2617

1044 2162 1065 2276 1085 2390

1153 2849 1174 2962 1194 3076

1113 2622 1133 2735

1052 2281 1072 2395 1092 2508

1161 2968 1181 3081 — —

1120 2740 1141 2854

1059 2400 1080 2513 1100 2627

1168 3086 1189 3200 — —

1128 2859 1148 2973

1067 2519 1087 2632 1108 2746

1176 3205 1196 3318 — —

1135 2978 1156 3091

1075 2637 1095 2751 1115 2864

1183 3324 — — — —

1143 3097 1163 3210

1082 2756 1102 2870 1123 2983

— —

—

1191 3442 —1150 3215 1171 3329

1130 3102

2988

1090 2875 11103900 [1841] 699 1526 727 1601 754 1675 782 1750 809 1824 837 1899 864 1973 927 2015 948 2080 968 2194 988 2307 1008 2421 1029 2534 1057 2648 1069 2761

1199 3561 — — — —

1178 3448

1158 3334

1097 2994 1117 3107 1138 3221

1077 2880

— — — — — —

1166 3453 1186 3566

1105 3112 1125 3226 1145 3339

— — — — — —

1173 3572 1193 3685

1112 3231 1133 3345 1153 3458

— — — — — —

1181 3690 — —

1120 3350 1140 3453 1160 3577

— — — — — —

3809 —1127 3468 1148 3582 1168 3695 —

1188

— — — — — —

1196 3928 — —

1135 3587 1155 3701 1175 3814

— — — — — —

— — — —

1142 3706 1163 3819 1183 3933

— — — — — —

— — — —

1150 3825 1170 3938 1190 4052

4800

4600

4400

4200

4000

3800

[2265]

[2171]

[2076]

[1982]

[1888]

[1793]

0.110 [0.027]

0.105 [0.026]

0.099 [0.025]

0.093 [0.023]

0.087 [0.022]

0.082 [0.020]

0.17

0.16

0.15

0.14

0.13

0.12

0.10

[0.042]

0.10

[0.040]

0.09

[0.037]

0.09

[0.035]

0.08

[0.032]

0.07

[0.030]

0.21

[0.025]

0.20

[0.024]

0.19

[0.022]

0.18

[0.021]

0.16

[0.020]

0.15

[0.017]

Standard Indoor Airow—CFM [L/s]

3600

3400

3200

[1699]

[1604]

[1510]

Resistance—Inches Water [kPa]

0.076 [0.019]

0.071 [0.018]

0.065 [0.016]

0.11

0.10

0.09

0.06

[0.027]

0.06

[0.025]

0.05

[0.022]

0.13

[0.015]

0.12

[0.014]

0.11

[0.012]

Component

[0.052]

[0.50]

[0.047]

[0.044]

[0.040]

[0.0.36]

[0.032]

[0.030]

[0.027]

External Static Pressure—Inches of Water [kPa]

657 1170 715 1245 742 1319 770 1394 797 1468 825 1543 852 1617 880 1692 956 1698 976 1703 996 1817 1017 1930

673 1179 701 1253 728 1328 756 1402 783 1477 811 1551 838 1626 866 1700 943 1705 963 1708 948 1822 976 1935 1024 2049

687 1261 714 1336 742 1410 769 1485 797 1559 824 1634 852 1708 879 1763 950 1811 971 1827 962 1941 989 2054 1032 2168

673 1270 700 1344 728 1419 755 1493 783 1588 810 1642 838 1717 865 1791 938 1813 958 1832 978 1946 975 2059 1003 2173 1039 2286

Capacity Model MPS 010

Air

0.1 [.02] 0.2 [.05] 0.3 [.07] 0.4 [.10] 0.5 [.12] 0.6 [.15] 0.7 [.17] 0.8 [.20] 0.9 [.22] 1.0 [.25] 1.1 [.27] 1.2 [.30] 1.3 [.32] 1.4 [.35] 1.5 [.37]

Flow

CFM [L/s]

— — — — — —

RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM WRPM W RPM W RPM W

3200 [1510]

— — — —

— —

3300 [1557]

3400 [1605]

3500 [1652]

686 1352 714 1427 741 1501 769 1576 796 1650 824 1725 851 1799 879 1874 945 1892 966 1951 986 2065 989 2178 1016 2292 1047 2405

— —

3600 [1699]

3700 [1746] 672 1361 700 1435 727 1510 755 1584 782 1659 810 1733 837 1808 865 1882 933 1896 953 1956 973 2070 993 2183 1002 2297 1030 2410 1054 2524

3800 [1793] 686 1443 713 1518 741 1592 768 1667 796 1741 823 1818 861 1890 878 1965 940 2003 960 2075 981 2189 1001 2302 1016 2416 1043 2529 1062 2643

4000 [1888] 713 1609 740 1683 768 1758 795 1832 823 1907 850 1961 878 2056 935 2085 955 2199 975 2312 996 2426 1016 2539 1043 2653 1070 2767

4100 [1935] 726 1692 754 1766 781 1841 809 1915 836 1990 864 2064 922 2091 942 2204 963 2318 983 2431 1003 2545 1024 2658 1056 2772 1084 2885 1084 2999

2663 1031 2777 1070 2890 1097 3004 1092 3117

2550 1011

990

970 2438

2323

950

930 2209

2147

877

2072

850

1998

822

795 1923

1849

767

4200 [1982] 740 1774

4300 [2029] 753 1857 781 1932 808 2006 836 2081 853 2155 917 2215 937 2328 957 2442 978 2555 998 2669 1018 2782 1039 2896 1083 3009 1111 3123 1099 3236

4400 [2077] 767 1940 794 2014 822 2089 849 2163 877 2238 924 2333 945 2447 965 2560 985 2674 1006 2787 1026 2901 1046 3014 1097 3128 1124 3241 1107 3355

952 2585 973 2679 993 2793 1013 2906 1033 3020 1054 3133 1110 3247 1138 3360 1115 3474

932 2452

4500 [2124] 780 2023 808 2097 835 2172 863 2248 912 2338

3. Do not operate above blower RPM shown as motor overloading will occur.

4. Do not set motor sheave below one turn open.

2. Re-adjustment of sheave required to achieve rated airow at ARI minimum E.S.P.

RPM 845 810 775 739 704 669 1138 1089 1041 992 943 894

Turns Open 1 2 3 4 5 6 1 2 3 4 5 6

4700 [2218] 807 2188 835 2263 862 2337 906 2462 927 2576 947 2689 967 2803 988 2916 1008 3030 1028 3143 1048 3257 1069 3371 1137 3484 1165 3598 1130 3711

Drive Package L M

4600 [2171] 794 2105 821 2180 840 2254 876 2329 919 2457 940 2571 960 2684 980 2798 1000 2911 1021 3025 1041 3138 1061 3252 1124 3365 1151 3479 1122 3592

4800 [2265] 821 2271 848 2345 876 2420 914 2581 934 2695 955 2808 975 2922 995 3035 1015 3149 1036 3262 1056 3376 1076 3489 1151 3603 1178 3716 1137 3830 1157 3943 1178 4057 1198 4170 — — — — — — — — — —

NOTE: L-Drive left of bold line, M-Drive right of bold line.

Motor Sheave 1VP-44 1VP-44

Blower Sheave BK90 BK65

Motor H.P. [W] 2.0 [1491.4] 3.0 [2237.1]

NOTES: 1. Factory sheave settings are shown in bold print.

COMPONENT AIR RESISTANCE, IWC 10 TON [35.2 kW]

Wet Coil

AIRFLOW CORRECTION FACTORS

10 TON [35.2 kW]

Horizontal Economizer

Economizer

100% R.A. Damper Open

4800

[2265]

4600

[2171]

4400

[2077]

4200

[1982]

4000

[1888]

3800

[1793]

3600

[1699]

3400

[1605]

3200

[1510]

100% O.A. Damper Open

Horizontal Economizer

100% R.A. Damper Open

NOTE: Add component resistance to duct resistance to determine total external static pressure.

1.04

1.01

1.09

1.03

1.01

1.07

1.05

1.02

1.01

1.000.99

1.02

1.00 1.01

1.00

0.99

0.97

0.98 0.99

0.95SENSIBLE MBH 0.91 0.93

0.97

0.96

[L/s]

TOTAL MBH

ACTUAL—CFM

POWER kW 0.98 1.000.98

NOTES: 1. Multiply correction factor times gross performance data.

DNA = Data not Available.

2. Resulting sensible capacity cannot exceed total capacity.

[ ] Designates Metric Conversions

McQuay IM 971-1 39

Performance Data

Figure 33: Airflow Performance—MPS 012B

3731

1230

36151190 3499

— — — —

1210

1220 3771 1240 3890

1146 2717 1167 2817

1155 2824 1176 2927

1164 2939 1184 3044

1173 3060 1193 3167

1182 3188 1202 3298

1100 2624 1122 2729 1143 2834

1110 2739 1131 2846 1152 2953

1120 2860 1140 2969 1161 3079

1191 3324 1211 3435

1129 2989 1150 3100 1171 3212

RPM W RPM W

1082 2416 1104 2516 1125 2616

1091 2516 1112 2619 1134 2722

RPM W RPM W RPM W

1201 3466 1221 3580

1139 3124 1160 3238 1180 3352

3382

1150 3266 11704500 [2123] — — 823 1910 850 2021 876 2133 902 2244 928 2355 953 2466 978 2577 1002 2688 1026 2800 1050 2911 1073 3022 1087 2917 1108 3034 1129 3150

1160 3415 1180 3534 1200 3653

1140 3297

1230 3934 1250 4055

1171 3572 1191 3692 1211 3813

3451

1151

3330

1241 4104 1260 4227

1182 3735 1202 3858 1221 3981

1251 4281 1270 4406

1193 3905 1212 4030 1232 4155

1262 4465 1281 4592

1273 4655 — —

1215 4266 1235 4396 1254 4525

1284 4853 — —

1239 4654 1258 4789 1276 4923

— — — —

— — — — — —

1251 4859 1269 4996 — —

5800

[2737]

5600

[2643]

5400

[2548]

5200

[2454]

5000

[2359]

4800

[2265]

4600

[2171]

Standard Indoor Airow—CFM [L/s]

4400

[2076]

4200

[1982]

4000

[1888]

3800

[1793]

0.136 [0.034]

0.131 [0.033]

0.125 [0.031]

0.120 [0.030]

0.115 [0.029]

0.110 [0.027]

0.105 [0.026]

Resistance—Inches Water [kPa]

0.099 [0.025]

0.093 [0.023]

0.087 [0.022]

0.082 [0.020]

0.22

0.21

0.20

0.19

0.18

0.17

0.16

0.15

0.14

0.13

0.12

0.14

[0.055]

0.12

[0.052]

0.10

[0.050]

0.09

[0.047]

0.10

[0.045]

0.10

[0.042]

0.10

[0.040]

0.09

[0.037]

0.09

[0.035]

0.08

[0.032]

0.07

[0.030]

0.24

[0.035]

0.23

[0.030]

0.22

[0.025]

0.21

[0.022]

0.21

[0.024]

0.21

[0.025]

0.20

[0.024]

0.19

[0.022]

0.18

[0.021]

0.16

[0.020]

0.15

[0.017]

[0.060]

[0.057]

[0.055]

[0.052]

[0.050]

[0.047]

[0.44]

[0.040]

[0.036]

External Static Pressure—Inches of Water [kPa]

Model MPS 012

0.1 [.02] 0.2 [.05] 0.3 [.07] 0.4 [.10] 0.5 [.12] 0.6 [.15] 0.7 [.17] 0.8 [.20] 0.9 [.22] 1.0 [.25] 1.1 [.27] 1.2 [.30] 1.3 [.32] 1.4 [.35] 1.5 [.37] 1.6 [.40] 1.7 [.42] 1.8 [.45] 1.9 [.47] 2.0 [.50]

RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W

Air

Flow

CFM [L/s]

3800 [1793] — — — — — — — — — — 834 1660 861 1743 888 1826 914 1909 939 1992 965 2075 990 2158 1014 2241 1038 2324 1062 2407

3900 [1840] — — — — — — — — 820 1647 847 1734 874 1821 900 1908 926 1995 951 2082 976 2169 1001 2256 1025 2343 1049 2430 1073 2517

— — — — 833 1726 860 1817 887 1908 913 1999 938 2090 963 2181 988 2272 1013 2363 1037 2454 1060 2545 1079 2519

—

4000 [1888] — — —

4100 [1935] — — — — — — 820 1717 847 1812 873 1907 900 2002 925 2097 951 2192 976 2287 1000 2382 1024 2477 1048 2572 1072 2668 1089 2631

4200 [1982] — — — — — — 834 1808 860 1907 887 2006 913 2106 938 2205 963 2304 988 2403 1012 2502 1036 2601 1060 2700 1077 2641 1098 2751

4300 [2029] — — — — 821 1805 848 1908 874 2011 900 2114 926 2217 951 2320 976 2423 1001 2527 1025 2630 1048 2733 1072 2836 1087 2765 1108 2877

4400 [2076] — — — — 835 1909 862 2016 888 2123 914 2230 939 2337 964 2445 989 2552 1013 2659 1037 2766 1061 2873 1077 2782 1098 2896 1119 3010

4600 [2171] 812 1912 838 2027 865 2142 891 2258 917 2373 942 2488 967 2603 991 2718 1015 2834 1039 2949 1063 3064 1077 2941 1098 3060 1119 3178

995 2903 1019 3026 1043 3149 1066 3273 1079 3119 1100 3243 1121 3366 1141 3489 1162 3612

970 2780

2656

946

2533

920

2410

895

2287

869

2163

842

4700 [2218] 827 2034 854 2153 880 2272 906 2391 931 2510 956 2630 981 2749 1005 2868 1029 2987 1052 3106 1076 3226 1089 3088 1109 3209 1130

4800 [2265]

1082 3316 1103 3444 1124 3571 1144 3699 1164 3827 1184 3954 1204 4082 1223 4209 1243 4337

3499

1047 3368 1070

3236

1024

3105

1000

2974

975

2843

951

2711

926

2580

900

2449

874

5000 [2359]

4900 [2312] 858 2302 884 2429 910 2556 935 2684 960 2811 985 2938 1009 3065 1033 3193 1056 3320 1070 3153 1091 3278 1112 3403 1132 3529 1153 3654 1173 3779

3357 1095 3486 1115 3616 1136 3746 1156 3876 1176 4006 1196 4136

1074

3416 1062 3551

1038

1068 3800 1079 3579 1100 3713 1120 3848 1140 3982 1160 4117 1180 4251 1200 4385 1219 4520

1045 3657

3514

990 3145 1015 3281

1021

3010

3370

997

3227

973

3083

916 2739 941 2875 966

948

2604

2940

923

890

5100 [2407]

5200 [2454] 906 2768 932 2907 957 3046 982 3186 1006 3325 1030 3465 1053 3604 1076 3743 1087 3532 1107 3664 1128 3796 1148 3928 1168 4060 1188 4192 1207 4324 1227 4457 1246 4589 1265 4721

5300 [2501]

5400 [2548] 939 3121 964 3268 989 3416 1013 3563 1037 3710 1060 3858 1072 3629 1092 3766 1113 3902 1133 4039 1153 4176 1173 4312 1193 4449 1212 4586 1232 4722

4098 1146 4237 1166 4376 1186 4515 1205 4654 1225 4793 1244 4932 — — — — — —

3820 1106 3959 1126

1085

4067

1076

3916

1053

3764

1029

3613

1005

3461

981

5500 [2595] 956 3310

COMPONENT AIR RESISTANCE,

IWC 12.5 TON [44 kW]

to duct resitance to determine toal E.S.P.

4. Drive data shown is for horizontal airow with dry coil. Add component resistance

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

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

RPM 1058 1022 978 932 861 813 1278 1245 1206 1167 1138 1097

Turns Open 1 2 3 4 5 6 1 2 3 4 5 6

5600 [2643] 973 3508 998 3663 1022 3819 1045 3974 1068 4130 1079 3877 1099 4018 1120 4159 1140 4301 1160 4442 1179 4583 1199 4724 1218 4866 1237 5007 — —

Drive Package L (B-51) M (B-58)

5700 [2690] 990 3714 1014 3873 1038 4033 1062 4192 1072 3936 1093 4080 1113 4223 1134 4367 1153 4510 1173 4654 1193 4797 1212 4941 — — — — — — — — — — — —

5800 [2737] 1007 3928 1031 4092 1055 4255 1078 4419 1087 4144 1107 4290 1128 4435 1148 4581 1167 4727 1187 4873 1206 5018 — — — — — — — — — — — — — — — — — —

NOTE: L-Drive left of bold line, M-Drive right of bold line.

Motor Sheave 1VP-44 1VP-65

Blower Sheave BK72H BK85H

Motor H.P. [W] 3.0 [2237.1] 5.0 [3728.5]

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

Component

Wet Coil

12.5 [44 kW]

AIRFLOW CORRECTION FACTORS

Horizontal Economizer

Economizer

100% R.A. Damper Open

5800

[2737]

5600

[2643]

5400

[2549]

5200

[2454]

5000

[2360]

4800

[2265]

4600

[2171]

4400

[2077]

4200

[1982]

4000

[1888]

3800

[1793]

100% O.A. Damper Open

Horizontal Economizer

100% R.A. Damper Open

1.03

1.11

1.05

1.02

1.09

1.04

1.02

1.07

1.03

1.01

1.05

1.02

1.01

1.00

1.03

1.000.99

1.00

0.99 1.00

0.97

0.99

0.94

0.97 0.98TOTAL MBH 0.95

0.91SENSIBLE MBH 0.85 0.88

0.96

[L/s]

ACTUAL—CFM

POWER kW 0.98 0.990.98

NOTES: 1. Multiply correction factor times gross performance data.

NOTE: Add component resistance to duct resistance to determine total external static pressure.

DNA = Data not Available.

2. Resulting sensible capacity cannot exceed total capacity.

[ ] Designates Metric Conversions

40 McQuay IM 971-1

Accessories

Table 20: Accessory Weights

Accessory McQuay Part Number Shipping Weight Operating Weight

Economizer, Analog Controls, 6-12 ton, Vertical MXRD-PDCM3 90 [41] 81 [32] Economizer, Analog Controls, 6-12 ton, Horizontal MXRD-RDCM3 90 [41] 81 [32] Economizer, DDC Controls, 6-12 ton, Vertical MXRD-PJCM3 90 [41] 81 [32] Economizer, DDC Controls, 6-12 ton, Horizontal MXRD-RJCM3 90 [41] 81 [32] OA damper, 6-12 ton, Manual MXRF-KDA1 26 [12] 21 [10] OA damper, Analog Controls, 6-12 ton, Motorized MXRF-JDB1 43 [19] 38 [17] OA damper, DDC Controls, 6-12 ton, Motorized MXRF-AW04 43 [19] 38 [17] Power Exhaust Kit, 6 - 12 Ton 208/230 V RXRX-BFF02C 44 [20] 42 [19] Power Exhaust Kit, 6 - 12 Ton 460V RXRX-BFF02D 44 [20] 42 [19] Power Exhaust Kit, 6 - 12 Ton 575 V RXRX-BFF02Y 44 [20] 42 [19] 14" Roof Curb, 6-12 Ton RXKG-CAD14 90 [41] 85 [39] Receptacle Outlet RXRX-AN01 N/A N/A Thermostat Guard 113130101 N/A N/A 7-Day Programmable Stat 113129901 N/A N/A Ionization Smoke Detector 113126601 N/A N/A

Sensor

Dual Enthalpy Kit RXRX-AV02 N/A N/A

RXRX-AR02 N/A N/A

McQuay IM 971-1 41

Accessories

Economizers: 6–12.5 Tons [21.1–44 kW]

• Features economizer controller

• Available factory installed or field accessory

• Gear driven direct drive actuator

• Fully modulating (0-100%)

• Low leakage dampers

• Slip-in design for easy installation

• Plug-in polarized electrical connections

• Pre-configured—no field adjustments necessary

Figure 34: Economizer: MPS 006B – 012B Ton

• Standard barometric relief damper

• Single enthalpy with dual enthalpy upgrade kit available

• CO

input sensor available

• Field assembled hood ships with economizer

• Economizer ships complete for downflow duct application

• Field installed power exhaust available

• Optional remote minimum position (Honeywell#

S963B112B) available

42 McQuay IM 971-1

Economizers: 6–12.5 Tons [21.1–44 kW]

Horizontal Duct Installation

Accessories

• Features economizer controller

• Available as a field installed accessory only

• Gear driven direct drive actuator

• Fully modulating (0-100%)

• Low leakage dampers

• Slip-in design for easy installation

• Plug-in polarized electrical connections

• Pre-configured—no field adjustments necessary

• Standard barometric relief damper

Figure 35: Economizer: MPS 006B – 012B

• Single enthalpy with dual enthalpy upgrade kit available

• CO

input sensor available

• Field assembled hood ships

• With economizer

• Economizer ships complete for

• Horizontal duct application

• Field installed power exhaust available

• Optional remote minimum position (Honeywell#

S963B112B) available

McQuay IM 971-1 43

Accessories

Fresh Air Dampers and Power Exhaust

Table 21: Air Damper and Exhaust Accessories

McQuay Model No. Description

MXRF-JDB1 Motorized fresh air damper for MPS-006B through -012B (back side)

MXRF-KDA1 Manual fresh air damper for MPS-006B through -012B (back side)

RXRX-AT01 Motorized Kit for MXRF-HEA1 RXRX-BFF02C Power exhaust, 208/230 volt for MPS-006B through -012B RXRX-BFF02D Power exhaust, 460 volt for MPS-006B through -012B RXRX-BFF02Y Power exhaust, 575 volt for MPS-006B through -012B

Power Exhaust Kit For Economizers: 6–12 Tons [21.1–70.3 Kw]

RXRX-BFF02 (C,D,Y Voltages) for MPS-006B-012B

• For economizer controller

• Downflow or horizontal applications

• Requires separate power supply with disconnect

Figure 36: Vertical Airflow Power Exhaust Economizer: MPS 006B – 012B

• Adjustable switch on economizer, factory preset to energize

power exhaust at 95% outside air position

• Polarized plug connects power exhaust relay to

economizer

44 McQuay IM 971-1

Figure 37: Horizontal Airflow Power Exhaust Economizer: MPS 006B – 012B

Accessories

Table 22: Power Exhaust

Model No.

RXRX-BFF02C 2 208-230 1 0.33 2200 [1038] 1518 2500 [1179] 1670 1.48 3.6 RXRX-BFF02D 2 460 1 0.33 2200 [1038] 1518 2500 [1179] 1670 0.75 1.8 RXRX-BFF02Y 2 575 1 0.33 2200 [1038] 1518 2500 [1179] 1670 0.81 1.5

Note: 1 CFM is at 0" W.C. external static pressure.

Unit includes 575 to 460 Volt step-down transformer

No.

of Fans

Volts Phase

(ea.)

Low Speed High Speed FLA

CFM [L/s] RPM CFM [L/s] RPM

(ea.)

LRA (ea.)

McQuay IM 971-1 45

Accessories

Fresh Air Damper Kit for 6–12.5 Ton [21.1–44.0 Kw] Units

Figure 38: Downflow and Horizontal Application: MPS 006B – 012B

Downflow

Horizontal

46 McQuay IM 971-1

Roofcurbs

Table 23: Roofcurb Accessories

McQuay Model No. Description

RXKG-CAE14 MPS-006B through -012B

Roofcurbs (Full Perimeter): 6–12.5 Tons [21.1–44.0 kW]

• One available height (14" [356 mm] for all models

• Quick assembly corners for easy installation

• Opening provided in bottom pan to match the “Thru the

Curb” electrical connection opening provided on the unit base pan

Figure 39: Typical Roofcurb Installation: MPS 006B – 012B

Accessories

• 1" [25 mm] x 4" [102 mm] Nailer provided

• Insulating panels provided

• Sealing gasket (28" [711 mm]) provided with Roofcurb.

• 18 gauge galvanized steel

McQuay IM 971-1 47

Controls and Operation

Furnace Section Controls and Ignition System

Normal Furnace Operating Sequence

This unit is equipped with a two stage integrated direct spark ignition control.

Normal Heat Mode

Call For First Stage (Low Fire) Only:

1 Zone thermostat contacts close, a call for first stage (low

fire) heat is initiated.

2 Control runs self check. 3 Control checks the high-limit switch for normally closed

contacts, each pressure switch for normally open contacts, and all flame rollout switches for continuity.

4 Control energizes each low-fire inducer. 5 Control checks each low-fire pressure switch for closure. 6 If each low-fire pressure switch is closed, the control

starts a 30 second prepurge. If either low-fire pressure switch is still open after 180 seconds, the high-fire inducers will be energized until closure.

7 After prepurge time-out, control initiates spark for two

seconds minimum (seven second maximum) ignition trial, and initiates a 120 second - second stage (high fire) warm up timing.

8 Control detects flame, de-energizes spark and initiates 45

second delay on blower timing.

9 After a fixed 45 seconds indoor blower delay on, the

control energizes the indoor blower .

10 After a fixed 120 seconds second stage warm-up period,

control checks thermostat input. If only W1 is called for, W2 is de-energized and the control starts a 30 second off delay on the W2 inducer.

11 After fixed 30 seconds the W2 inducer is de-energized. 12 Control enters normal operating loop where all inputs are

continuously checked.

13 Zone thermostat is satisfied. 14 Control de-energizes gas valve. 15 Control senses loss of flame. 16 Control initiates five second inducer postpurge and 90

second indoor blower delay off.

17 Control de-energizes inducer blower. 18 Control de-energizes indoor blower. 19 Control in the stand by mode with solid red LED.

Call For Second Stage, After First Stage Established; Starting from A.11:

If a call for second stage (high fire) is initiated after a call

for first stage heat is established, the control energizes

the W2 inducer and energizes the second stage of the gas valve.

2 Control enters normal operating loop where all inputs are

continuously checked.

Second Stage Satisfied; First Stage Still Called For; Starting From B.3:

Once the call for second stage is satisfied, the control

starts a 30 second off delay on W2 inducer and reduces the gas valve to first stage.

2 Control enters normal operating loop where all inputs are

continuously checked.

First Stage Satisfied:

1 Zone thermostat is satisfied. 2 Control de-energizes gas valve. 3 Control senses loss of flame. 4 Control initiates five second inducer postpurge and 90

second indoor blower delay off.

5 Control de-energizes inducer blower. 6 Control de-energizes indoor blower. 7 Control in the stand by mode with solid red LED.

First Stage and Second Stage Called Simultaneously:

1 Zone thermostat contacts close, a call for first stage (low

fire) and second stage (high fire) heat is initiated.

2 Control runs self check. 3 Control checks the high-limit switch for normally closed

contacts, each pressure switch for normally open contacts, and all flame rollout switches for continuity.

4 Control energizes each low-fire inducer. 5 Control checks each pressure switch for closure. 6 If each low-fire pressure switch is closed, the control

starts a 30 second prepurge. If either switch is still open after 180 seconds, the high-fire inducers will be energized until closure.

7 After prepurge time-out, control initiates spark for two

seconds minimum (seven seconds maximum) ignition trial, and initiates a 120 second stage warm up timing.

8 Control detects flame, de-energizes spark and starts a 45

second indoor blower delay on timing.

9 After a fixed 45 seconds indoor blower delay on, the

control energizes the indoor blower.

10 After a fixed 120 seconds second stage warm-up period,

control checks the thermostat input. If W1 and W2 is present control enters normal operating loop where all inputs are continuously checked.

First Stage and Second Stage Removed Simultaneously:

1 Upon a loss of W1 and W2 the gas valve is de-energized.

48 McQuay IM 971-1

Controls and Operation

2 Upon a loss of flame, each inducer will complete a five

second postpurge and the indoor blower will complete a 90 second delay off.

3 Control in the stand by mode with solid red LED.

The integrated control is a four-ignition system. After a total of four cycles without sensing main burner flame,

the system goes into a 100% lockout mode. After one hour, the ignition control repeats the prepurge and ignition cycles for 4 tries and then go into 100% lockout mode again. It continues this sequence of cycles and lockout each hour until ignition is successful or power is interrupted. During the lockout mode, neither the ignitor or gas valve will be energized until the system is reset by turning the thermostat to the “OFF” position or interrupting the electrical power to the unit for 3 seconds or longer. The induced draft blower and main burner will shut off when the thermostat is satisfied.

The circulating air blower will start and run on the heating speed if the thermostat fan switch is in the “ON” position. The integrated furnace control is equipped with diagnostic LED. The LED is lit continuously when there is power to the control, with or without a call for heat. If the LED is not lit, there is either no power to the control or there is an internal component failure within the control, and the control should be replaced.

If the control detects the following failures, the LED will flash on for approximately 1/4 second, then off for 3/4 second for designated failure detections.

1 Flash: Failed to detect flame within the four tries for

ignition.

2 Flash: Pressure switch or induced draft blower problem

detected.

3 Flash: High limit or auxiliary limit open. 4 Flash: Flame sensed and gas valve not energized or

flame sensed with no “W” signal.

5 Flash: Over-temperature switch open.

Operating Instructions

This unit is equipped with integrated furnace control. This device lights the main burners each time the room thermostat (closes) calls for heat. See operating instructions on the back

of the furnace/controls access panel.

DANGER

Never test for gas leaks with an open flame. It can cause an explosion or fire resulting in property damage, personal injury or death. Use a commercially available soap solution made specifically for the detection of leaks to check all connections as specified in the Mechanical Installation section of these instructions.

To Start Furnace

1 Set the thermostat to its lowest setting. 2 Turn off all electric power to the unit. 3 This unit does not have a pilot. It is equipped with an

ignition device which automatically lights the burner. Do not try to light the burner by hand.

4 Remove control door. 5 Move control knob to the “OFF” position. Turn the knob

by hand only, do not use any kind of tool.

6 Wait five minutes to clear out any gas. Then smell for

gas, including near the floor. If you smell gas, STOP! Follow B in the safety information on the Operating Instructions located on the back of the controls/access panel. If you don't smell gas, go to the next step.

7 Move the gas control knob from “OFF” position to “ON”

position. Operate this unit with the gas control knob in the “ON” position only. Do not use the gas control knob as a means for throttling the burner input rate.

8 Replace the control door.

9 Turn on all electric power to the unit. 10 Set the thermostat to the desired setting. 11 If the unit will not operate, follow the instructions below

on how to shut down the furnace.

DANGER

The spark ignitor and ignition leading from the ignition control are high voltage. Keep hands or tools away to prevent electrical shock. Shut off electrical power before servicing any of the controls. Failure to adhere to this warning can result in personal injury or death.

The initial start-up on a new installation may require the control system to be energized for some time until air has bled through the system and fuel gas is available at the burners.

To Shut Down Furnace

1 Set the thermostat to the lowest setting.

2 Turn off all electric power to the unit if service is to be

performed.

3 Remove control door.

4 Move control knob to the “OFF” position.

5 Replace control door.

DANGER

Should overheating occur or the gas supply fail to shut off, shut off the manual gas valve to the unit before shutting off the electrical supply. Failure to do so can result in an explosion or fire causing property damage, severe personal injury or death!

McQuay IM 971-1 49

Controls and Operation

Burners

Burners for these units have been designed so that field adjustment is not required. Burners are tray-mounted and accessible for easy cleaning when required.

Manual Reset Over-Temperature Control

Two manual reset over-temperature controls are located on the burner shield. These devices sense blockage in the heat exchanger or insufficient combustion air. This shuts off the main burners if excessive temperatures occur in the burner compartment.

Operation of this control indicates an abnormal condition. Therefore, the unit should be examined by a qualified installer, service agency, or the gas supplier before being placed back

into operation.

DANGER

DO NOT JUMPER THIS DEVICE! DO NOT reset the overtemperature control without taking corrective action to assure that an adequate supply of combustion air is maintained under all conditions of operation. Failure to do so can result in carbon monoxide poisoning or death. Replace this control only with the identical replacement part.

Pressure Switch

This furnace has two pressure switches for sensing a blocked exhaust or a failed induced draft blower . They are normally open and close when the induced draft blower starts, indicating air flow through the combustion chamber.

Limit Control

The supply air high temperature limit cut-off is set at the factory and cannot be adjusted. It is calibrated to prevent the air temperature leaving the furnace from exceeding the

maximum outlet air temperature.

DANGER

Do not jumper this device! Doing so can cause a fire or explosion resulting in property damage, personal injury or death.

IMPORTANT: Replace this control only with the identical replacement part.

50 McQuay IM 971-1

Maintenance

General

Advise The Customer

1 Change the air filters regularly. The heating system

operates better, more ef ficiently and more economically.

2 Except for the mounting platform, keep all combustible

articles three feet from the unit and exhaust system.

3 IMPORTANT: Replace all blower doors and

compartment cover after servicing the unit. Do not operate the unit without all panels and doors securely in place.

4 Do not allow snow or other debris to accumulate in the

vicinity of the unit.

Unit Maintenance

Furnace Section

The unit's furnace should operate for many years without excessive scale build-up in flue passageways; however, it is recommended that a qualified installer, service agency, or the gas supplier annually inspect the flue passageways, the exhaust system and the burners for continued safe operation, paying particular attention to deterioration from corrosion or other sources.

ignitor cable. Mark all wires disconnected for proper reconnection.

6 Remove the screws (4) connecting the burner tray to the

heat exchanger mounting panel.

7 Remove the burner tray and the manifold assembly from

the unit.

8 Remove the screws (10) connecting the two induced

draft blowers to the collector box and screws (12) connecting the inducer mounting plate to the heat exchanger center panel. Remove the induced draft blower and the collector box from the unit.

9 Remove the turbulators from inside the heat exchangers

by inserting the blade of a screwdriver under the locking tabs. Pop the tabs out of the expanded grooves of the heat exchanger. Slide the turbulators out of the heat exchangers.

10 Direct a water hose into the outlet of the heat exchanger

top. Flush the inside of each heat exchanger tube with water. Blow out each tube with air to remove excessive moisture.

11 Reassemble (steps 1 through 9 in reverse ord er). Be

careful not to strip out the screw holes used to mount the collector box and inducer blower . Replace inducer blower gasket and collector box gasket with factory

replacements if damaged.

If during inspection the flue passageways and exhaust system are determined to require cleaning, the following procedures should be followed (by a qualified installer, service agency, or gas supplier):

1 Turn off the electrical power to the unit and set the

thermostat to the lowest temperature.

2 Shut off the gas supply to the unit either at the meter or at

manual valve in the supply piping.

DANGER

Label all wires prior to disconnection when servicing controls. wiring errors can cause improper and dangerous operation resulting in fire, electrical shock, property damage, personal injury or death.

3 Remove the furnace controls access panel and the control

box cover.

4 Disconnect the gas supply piping from the gas valve. 5 Disconnect the wiring to the induced draft blower motor,

gas valve, flame sensor, and flame roll-out control, and

DANGER

Holes in the exhaust transition or heat exchanger can cause toxic fumes to enter the home. The exhaust transition or heat exchanger must be replaced if they have holes or cracks in them. Failure to do so can cause carbon monoxide poisoning resulting in personal injury or death.

The manufacturer recommends that a qualified installer, service agency or the gas supplier visually inspect the burner flames for the desired flame appearance at the beginning of the heating season and approximately midway in heating season.

The manufacturer also recommends that a qualified installer, service agency or the gas supplier clean the flame sensor with

steel wool at the beginning of the heating season.

DANGER

Power supply to unit must be disconnected before making field connections. To avoid electrical shock, personal injury or death, be sure to rigorously adhere to field wiring procedures regarding proper lockout and tagout of components.

McQuay IM 971-1 51

Maintenance

Lubrication

IMPORTANT: DO NOT attempt to lubricate the bearings on the blower motor or the induced draft blower motor. Addition of lubricants can reduce the motor life and void the warranty.

The blower motor and induced draft blower motor are prelubricated by the manufacturer and do not require further attention.

A qualified installer, service agency or the gas supplier must periodically clean the motors to prevent the possibility of overheating due to an accumulation of dust and dirt on the windings or on the motor exterior. And, as suggested elsewhere in these instructions, the air filters should be kept clean because dirty filters can restrict air flow and the motor depends upon sufficient air flowing across and through it to prevent overheating.

Cooling Section Maintenance

DANGER

It is recommended that at the beginning of each cooling season a qualified installer or service agency inspect and clean the cooling section of this unit. The following areas should be addressed: evaporator coil. condenser coil, condenser fan motor and venturi area.

To Inspect The Evaporator Coil

1 Open the control/filter access panel and remove filters.

Also, remove blower access panel. In downflow applications remove the horizontal return to gain access.

DANGER

Label all wires prior to disconnection when servicing the unit. Wiring errors can cause improper and dangerous operation resulting in fire, electrical shock, property damage, severe personal injury or death.

2 Shine a flashlight on the evaporator coil (both sides) and

inspect for accumulation of lint, insulation, etc.

3 If coil requires cleaning, follow the steps shown below.

Cleaning Evaporator Coil

1 The coil should be cleaned when it is dry. If the coil is

coated with dirt or lint, vacuum it with a soft brush attachment. Be careful not to bend the coil fins.

2 If the coil is coated with oil or grease, clean it with a mild

detergent-and-water solution. Rinse the coil thoroughly with water. IMPORTANT: Do not

use excessive water pressure. Excessive water pressure can bend the fins and tubing of the coil and lead to inadequate unit performance. Be careful not to splash water excessively into unit.

3 Inspect the drain pan and condensate drain at the same

time the evaporator coil is checked. Clean the drain pan by flushing with water and removing any matters of obstructions which may be present.

4 Go to next section for cleaning the condenser coil.

Cleaning Condenser Coil, Condenser Fan, Circulation Air Blower and Venturi

1 Remove the compressor access panel. Disconnect the

wires to the condenser fan motor in the control box (see wiring diagram).

2 The coil should be cleaned when it is dry. If the coil is

coated with dirt or lint, vacuum it with a soft brush attachment. Be careful not to bend the coil fins.

3 If the coil is coated with oil or grease, clean it with a mild

detergent-and-water solution. Rinse the coil thoroughly with water. IMPORTANT: Do not

use excessive water pressure. Excessive water pressure can bend the fins and tubing of the coil and lead to inadequate unit performance. Be careful not to splash water excessively into unit.

4 The venturi should also be inspected for items of

obstruction such as collections of grass, dirt or spider webs. Remove any that are present.

5 Inspect the circulating air blower wheel and motor for

accumulation of lint, dirt or other obstruction and clean it necessary. Inspect the blower motor mounts and the blower housing for loose mounts or other damage. Repair or replace if necessary.

Re-Assembly

1 1 Reconnect fan motor wires per the wiring diagram

attached to the back of the cover.

2 Close the filter control and replace the blower/evaporator

coil access panels.

3 Replace the control box cover. 4 Restore electrical power to the unit and check for proper

operation, especially the condenser fan motor.

52 McQuay IM 971-1

System Charging Charts

Figure 40: System Charging Charts - MPS 006B Cooling

SY S TE M C HAR G E C HART - R E FR IGE R ANT 410A

6 TON, C IR C UIT 1

525

500

Maintenance

475

450

425

400

375

350

325

300

275

250

225

200

115

105

175

100 105 110 115 120 125 130 135 140 145 150

155

160 165

92-102259-06-00

McQuay IM 971-1 53

Maintenance

Figure 41: System Charging Charts - MPS 007B Cooling (Dual Circuit)

SYSTEM CHARGE CHART - REFRIGERANT 410A

7 TON, C IR CUIT S 1 & 2

BOTH COMPRESSORS MUST BE OPERATING BEFORE CHECKING REFRIGERANT CHARGE.

RETURN AIR TEMPERATURE MUST BE WITHIN COMFORT CONDITIONS BEFORE FINAL REFRIGERANT CHECK!

525

500

475

450

425

400

375

350

325

300

275

250

225

200

175

100 105 110 115 120 125 130 135 140 145 150

160 165

155

115

105

-B090, C IR C UIT 1

525

500

475

450

425

400

375

350

325

300

275

250

225

200

175

100 105 110 115 120 125 130 135 140 145 150

-B090, C IR C UIT 2

115

105

160 165

155

92-102259-08-00

54 McQuay IM 971-1

Figure 42: System Charging Charts - MPS 008B Cooling

S Y S TE M CHAR G E CHAR T - R E FR IG E R ANT 410A

8 TON, C IR CU I T S 1 & 2

BOTH COMPRESSORS MUST BE OPERATING BEFORE CHECKING REFRIGERANT CHARGE.

RETURN AIR TEMPERATURE MUST BE WITHIN COMFORT CONDITIONS BEFORE FINAL REFRIGERANT CHECK!

525

500

475

450

425

400

375

350

325

300

275

250

225

200

175

100 105 110 115 120 125 130 135 140 145 150

Maintenance

115

105

160 165

155

-B102, C IR C UIT 1

525

500

475

450

425

400

375

350

325

300

275

250

225

200

175

100 105 110 115 120 125 130 135 140 145 150

-B102, C IR C UIT 2

115

105

160 165

155

92-102259-09-00

McQuay IM 971-1 55

Maintenance

Figure 43: System Charging Charts - MPS 010B Cooling

S Y S TE M C HAR GE C HAR T - R E F R IGE R ANT 410A

10 TON, C IR C U IT S 1 & 2

BOTH COMPRESSORS MUST BE OPERATING BEFORE CHECKING REFRIGERANT CHARGE.

RETURN AIR TEMPERATURE MUST BE WITHIN COMFORT CONDITIONS BEFORE FINAL REFRIGERANT CHECK!

525

500

475

450

425

400

375

350

325

300

275

250

225

200

175

100 105 110 115 120 125 130 135 140 145 150

115

105

160 165

155

-B120, C IR CUIT 1

525

500

475

450

425

400

375

350

325

300

275

250

225

200

175

100 105 110 115 120 125 130 135 140 145 150

-B120, C IR CUIT 2

115

105

160 165

155

92-102259-10-00

56 McQuay IM 971-1

Figure 44: System Charging Charts - MPS 012B Cooling

SYSTEM CHARGE CHART - REFRIGERANT 410A

12 TON, C IR C U IT S 1 & 2

BOTH COMPRESSORS MUST BE OPERATING BEFORE CHECKING REFRIGERANT CHARGE.

RETURN AIR TEMPERATURE MUST BE WITHIN COMFORT CONDITIONS BEFORE FINAL REFRIGERANT CHECK!

525

500

475

450

425

400

375

350

325

300

275

250

225

200

175

100 105 110 115 120 125 130 135 140 145 150

Maintenance

115

105

160 165

155

-B 150, C IR C UIT 1

525

500

475

450

425

400

375

350

325

300

275

250

225

200

175

100 105 110 115 120 125 130 135 140 145 150 155

-B 150, C IR C UIT 2

115

105

160 165

92-102259-11- 00

McQuay IM 971-1 57

Troubleshooting

Cooling Troubleshooting Chart

DANGER

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.

SYMPTOM POSSIBLE CAUSE REMEDY

Unit will not run Power off or loose electrical connection

Thermostat out of calibration-set too high Reset Failed contactor Blown fuses Replace fuses

Transformer defective Check wiring-replace transformer High pressure control open (if provided) Interconnecting low voltage wiring damaged Replace thermostat wiring

Condenser fan runs, compressor doesn’t Loose connection

Compressor stuck, grounded or open motor winding, open internal overload.

Low voltage condition Low voltage condition Add start kit components

Insufficient cooling Improperly sized unit Recalculate load

Improper airflow Incorrect refrigerant charge Air, non-condensable or moisture in system Incorrect voltage

Compressor short cycles Incorrect voltage

Defective overload protector Replace check for correct voltage Refrigerant undercharge Add refrigerant

Registers sweat Low evaporator airflow High head-low vapor pressures

High head-high or normal vapor pressure Cooling mode

Low vapor - cool compressor iced evaporator coil

Low vapor cool evaporator coil Low evaporator airflow

High vapor pressure Excessive load Recheck load calculation Fluctuating head & vapor Air or non-condensate in system Recover refrigerant, evacuate & recharge

Gurgle or pulsing noise at expansion device or liquid line

Restriction in liquid line, expansion device or filter drier Flow check piston size too small Change to correct size piston Incorrect capillary tubes Change coil assembly

Dirty condenser coil Clean coil Refrigerant overcharge Correct system charge

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

Defective Compressor valves Replace compressor Incorrect capillary tubes Replace coil assembly

Operating below 65°F outdoors Add Low Ambient Kit Moisture in system

Defective compressor Replace

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

Check for correct voltage at compressor contactor in control box

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

Reset-also see high head pressure remedy-The high pressure control opens at 450 PSIG

Check for correct voltage at compressor check & tighten all connections Wait at least 2 hours for overload to reset. If still open, replace the compressor. At compressor terminals, voltage must be within 10% of rating plate volts when unit is operating

Check should be approximately 400 CFM per ton. Charge per procedure attached to unit service panel Recover refrigerant, evacuate & recharge, add filter drier At compressor terminals, voltage must be within 10% of rating plate volts when unit is operating. At compressor terminals, voltage must be ±10% of nameplate marking when unit is operating.

Increase speed of blower or reduce restriction replace air filter

Remove or replace defective component

Increase speed of blower or reduce restriction replace air filter

Recover refrigerant evacuate & recharge add filter drier

58 McQuay IM 971-1

Furnace Troubleshooting Guide

HAZARDOUS VOLTAGE

LINE VOLTAGE

CONNECTIONS

START

SET THERMOSTAT TO

CALL FOR HEAT

SET FAN SWITCH TO AUTO

YES

INDUCED DRAFT BLOWER

MOTOR STARTS

YES

30 SECOND PREPURGE

• CHECK LINE VOLTAGE TO IFC

• CHECK LOW VOLTAGE TRANSFORMER

• CHECK WIRING

• CHECK FOR 208-230 VAC TO IDM MOTOR

WARNING

▲

DISCONNECT POWER BEFORE SERVICING. SERVICE MUST BE BY A TRAINED, QUALIFIED SERVICE TECHNICIAN.

YES

REPLACE INDUCED

DRAFT BLOWER

Troubleshooting

REPLACE INTEGRATED CONTROL BOARD (IFC)

REPLACE IGNITOR/ CABLE ASSEMBLY

YES

IGNITOR SPARKS

YES

MAIN BURNER LIGHTS

YES

• CHECK IGNITOR CABLE

• CHECK SPARK IGNITOR POSITION AND CONDITION

• IS EACH NEGATIVE PRESSURE SWITCH CLOSED?

• CHECK FOR OPEN ROLL-OUT CONTROLS

• CHECK FOR OPEN LIMIT

• CHECK IGNITION CONTROL CHASSIS GROUND WIRE

• CHECK WIRING

REPLACE IGNITION

CONTROL

NOTE: THE SYSTEM WILL ATTEMPT TO LIGHT 4 TIMES WITH A 60 SECOND INTER-

PURGE BETWEEN TRIES. IF AFTER THE THIRD TIME THE BURNERS DO NOT LIGHT, THE SYSTEM WILL LOCK OUT. IF THE UNIT IS EQUIPPED WITH A UNITED TECH. THE SYSTEM WILL ATTEMPT TO LIGHT 4 TIMES EACH HOUR UNTIL THE BURNERS LIGHT OR THE THERMOSTAT IS RESET OR POWER IS REMOVED FOR 3 SECONDS OR GREATER.

• CHECK INLET GAS PRESSURE

• CHECK 24 VOLTS TO GAS VALVE

• CHECK FOR GAS FLOW TO AND FROM VALVE

• CHECK BURNER CARRYOVER

YES

• CHECK NEGATIVE PRESSURE SWITCH SENSING TUBE

• CHECK FOR EXHAUST BLOCKAGE

REPLACE NEGATIVE

PRESSURE SWITCH

CHECK FOR EXHAUST,

EXCHANGER BLOCKAGE

AND RESET CONTROL

REPLACE LIMIT IF UNIT IS COLD

REPLACE INTEGRATED CONTROL BOARD (IFC)

INTAKE OR HEAT

IF WIRING IS OK

YES

REPLACE VALVE

FLOW CHART CONTINUED ON NEXT PAGE

McQuay IM 971-1 59

Troubleshooting

MAIN BURNER FLAME SUSTAINED

YES

NOTE: IF THE SYSTEM GOES INTO LOCKOUT,WAIT

30 SECONDS AND RESET THE SYSTEM.

• CHECK FLAME SENSOR POSITION AND CONDITION

• CLEAN FLAME SENSOR WITH STEEL WOOL

• CHECK FLAME SENSOR WIRES AND CONNECTIONS

REPLACE IGNITION

CONTROL

YES

REPLACE SENSOR

INDOOR BLOWER MOTOR STARTS

AFTER 45 SECONDS

YES

SYSTEM RUNS UNTIL

CALL FOR HEAT ENDS

YES

FURNACE STARTS ON LOW OR HIGH FIRE. FURNACE SWITCHES TO LOW FIRE AFTER 120 SECONDS WARMUP IF THERMOSTAT IS CALLING FOR W1. FURNACE WILL SWITCH TO HIGH FIRE IF LOW FIRE DOES NOT SATISFY THERMOSTAT DEMAND FOR HEAT LOAD.

YES

TURN THERMOSTAT OFF

VALVE SHUTS OFF

FLAME SHUTS OFF

YES

• CHECK FOR 208-230 VAC ACROSS BLOWER MOTOR TERMINALS ON CONTROL BOARD

• CHECK FOR LINE VOLTAGE AT LOAD SIDE OF BLOWER CONTACT.

YES

REPLACE BLOWER

MOTOR

• CHECK FOR OPEN LIMIT

• CHECK FOR OPEN ROLL-OUT CONTROL

• CHECK FOR PROPER THERMOSTAT OPERATION

• REMOVE VALVE LEAD AT GAS VALVE IF VALVE CLOSES, RECHECK THE THERMOSTAT AND WIRING. IF OK,THEN REPLACE VALVE

YES

REPLACE INTEGRATED CONTROL BOARD (IFC)

• CHECK FOR DIRTY FILTERS

• CHECK FOR RESTRICTED AIR-FLOW

CHECK FOR EXHAUST,

INTAKE OR HEAT

EXCHANGER BLOCKAGE

CLEAR BLOCKAGE AND

RESET CONTROL

INDUCED DRAFT MOTOR STOPS

AFTER 5 SECOND POSTPURGE

YES

INDOOR BLOWER MOTOR STOPS

AFTER 90 SECONDS

YES

TROUBLESHOOTING ENDS

REPEAT PROCEDURE UNTIL TROUBLE FREE

OPERATION IS OBTAINED.

60 McQuay IM 971-1

Warranty

Replacement Parts

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

Warranty

McQuay IM 971-1 61

McQuay Training and Development

Now that you have made an investment in modern, efficien t 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 info rm a tio n as of this pr int ing . Fo r th e mo st up - to- d ate pro d uc t information, please go to www.mcquay.com.

McQuay MPS006B Installation Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Introduction

General

WARNING

Table 1: Operation, Installation and Maintenance Resources

Checking Product Received

Safety Information

DANGER

WARNING

WARNING

DANGER

WARNING

DANGER

WARNING

Major Components

Mechanical Installation

General

WARNING

Pre-Installation Check-Points

Location Considerations

3 Shielding by a fence or shrubs may give some protection. 4 Frequent washing of the cabinet, fan blade and coil with

WARNING

Outside Installation

DANGER

Figure 1: Outside Slab Installation

Attaching Exhaust and Combustion Air Inlet Hoods

3 Attach blower access panel. 4 Attach the combustion air inlet/exhaust hood with

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.

Cover Panel Installation/Conversion Procedure

Downflow To Horizontal

Figure 2: Cover Gasket Detail, Downflow to Horizontal

Filter Replacement

Clearances

Table 2: Recommended Clearances

*Without Economizer. 48” With Economizer

Figure 3: Clearances

Location

Figure 4: Flat Rooftop Installation, With Attic or Drop Ceiling Distributing System

Rooftop Installation

Ductwork

DANGER

Return Air

DANGER

Figure 5: Rigging Detail

Figure 6: Shipping Board Removal

Figure 7: Roofcurb

Gas Supply, Condensate Drain

Gas Connection

Figure 8: Suggested Gas Piping

DANGER

Table 3: Gas Pipe Capacity Table (Cu. Ft./Hr.)

Equivalent Length of Pipe, Feet

Gas Input of Furnace (BTU/Hr)

Heating Value of Gas (BTU/Ft3)

LP Conversion

DANGER

Adjusting or Checking Furnace Input

Heating Value of Gas (BTU/CuFt) x 3600

Time in Seconds for 1 Cu. Ft. of Gas

Table 4: Meter Time In Minutes And Seconds For Normal Input Rating Of Furnaces Using Natural Or Lp Gas

40,000

60,000

80,000

100,000

900 1000 1040 1100 2500

Min. Sec. Min. Sec. Min. Sec. Min. Sec. Min. Sec.

13

21 30

0

41 45

33 24

Table 5: LP Gas Pipe Capacity (Cubic feet per hour)

1 1,071 732 590 504 448 409 378 346 322 307 1-1/4 2,205 1,496 1,212 1039 913 834 771 724 677 630 1-1/2 3,307 2,299 1,858 1,559 1,417 1,275 1,181 1,086 1,023 976

2 6,221 4,331 3,465 2,992 2,646 2,394 2,205 2,047 1,921 1,811

15

10

0 0