McQuay SWP023 User Manual

Self-Contained Air Conditioning Systems

Type SWP Vintage H
with R-410A Refrigerant

Capacity: 20 through 130 tons

Catalog 860-9

Engineered for flexibility and performance™

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

Continued Leadership in

Self-Contained Systems Design s . . . . . . . . . . . . . . .3

McQuay Self-Contained Systems . . . . . . . . . . . . . . . 4

SWP 012–130 Features and Options . . . . . . . . . . . . 4

Cabinet, Casing and Frame . . . . . . . . . . . . . . . . . 6

Compressor/ Condensing Section . . . . . . . . . . . . 7

Cooling Coil Section . . . . . . . . . . . . . . . . . . . . . . .8

Supply Fan Section . . . . . . . . . . . . . . . . . . . . . . . .8

Acoustical Discharge Plenum . . . . . . . . . . . . . . . 10

Variable Air Volume Control . . . . . . . . . . . . . . . . 10

Economizer Options . . . . . . . . . . . . . . . . . . . . . .10

Condenser Head Pressure Control . . . . . . . . . . .11

Filter Section . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Blank Sections . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Heating Section . . . . . . . . . . . . . . . . . . . . . . . . . .12

System Flexibility with Unit Options . . . . . . . . . . . . 13

Selection/Application Flexibility . . . . . . . . . . . . . .13

Arrangement Flexibility . . . . . . . . . . . . . . . . . . . .13

Optimal Discharge Air Temperature . . . . . . . . . .13

Controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

R-410A Refrigerant . . . . . . . . . . . . . . . . . . . . . . . 14

MicroTech III Unit Controls . . . . . . . . . . . . . . . . . . . . 15

Open Choices Benefits for Easy Integration . . . . 15

Alarm Management and Control . . . . . . . . . . . . . 21

Application Considerations . . . . . . . . . . . . . . . . . . .23

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Unit Location . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Acoustical Considerations . . . . . . . . . . . . . . . . . .24

Equipment Room . . . . . . . . . . . . . . . . . . . . . . . .24

Ductwork . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

Condenser Water Piping . . . . . . . . . . . . . . . . . . . 25

Head Pressure Control . . . . . . . . . . . . . . . . . . . . 25

Variable Air Volume . . . . . . . . . . . . . . . . . . . . . . 25

Variable Frequency Drives . . . . . . . . . . . . . . . . .26

Duct Static Pressure Sensor Placement . . . . . . .26

Zone Sensor Placement . . . . . . . . . . . . . . . . . . .26

Filtration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

System Operating Limits . . . . . . . . . . . . . . . . . . .27

Airflow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Fan Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

Condenser Water Flow . . . . . . . . . . . . . . . . . . . . 27

Coil Freeze Protection . . . . . . . . . . . . . . . . . . . . 28

Air Density Correction . . . . . . . . . . . . . . . . . . . . . 28

Unit Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Terms of Sale . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . 29

Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

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

DX Cooling Capacity Data . . . . . . . . . . . . . . . . . 36

Waterside Economizer Capacity . . . . . . . . . . . . 44

Heating Capacity Data . . . . . . . . . . . . . . . . . . . . 45

Component Pressure Drops . . . . . . . . . . . . . . . 46

Total Unit Water Pressure Drop . . . . . . . . . . . . . 49

Fan Curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Dimensional Data . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Recommended Clearances . . . . . . . . . . . . . . . . 61

Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Supply Power Wiring . . . . . . . . . . . . . . . . . . . . . 65

Unit Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

2 McQuay Catalog 860-9

Introduction

Introduction

Continued Leadership in Self-Contained Systems Designs

McQuay SWP self contained air conditioning systems trace
their history to the late 1970s. The first self contained variable
air volume systems with waterside economizer cycle was
developed by us for the prestigious 499 Park Avenue office
building in New York City. McQuay SWP, with decades of
innovation, design flexibility, durable construction, low capitol
and operating cost, make us the leader of self contained system
market and the preferred HVAC solution for thousand of most
prominent building projects.

SWP water cooled self-contained air conditioner is an ideal
option for a job where energy efficiency, reliability, indoor air
quality and acoustic are top priorities. Along with providing
high quality and state-of-the-art technology, SWP self­contained systems offer the following valuable features and
benefits to satisfy a wide range of diverse applications.

• Comfort and Redundancy

– Occupants enjoy individual control over comfort condi-

tions and off-hour system operation.

– Tenants benefit from their indivi dual efforts to control

energy costs.

– Routine service is located where it minimizes tenant

inconvenience.

– Individual or dual systems per floor provide system

redundancy and standby.

• Economical First Cost

– VAV system flexibility uses building diversity to reduce

system tonnage and first cost.

– Factory-packaged concept reduces field labor, installation

time and expense.
– No expensive chilled water piping or chiller room.
– Individually tested, factory-designed systems reduce

startup and installation expense.
– Reduced penthouse and equipment room requirements.
– Centralized condenser water and condensate piping and

streamlined system layout.
– Modular units design make renovation projects easier

since individual section designed for narrow hallways,

elevators and doorways.
– Optional acoustical discharge plenum is an available

option in any height to match your job needs and mini-

mizes supply duct transition losses.

• Energy Efficient System

– Reduces fan kW and operating costs at part load condi-

tions.
– Savings maximized through use of variable speed fan

control.
– Individual zone control.

• Improving Indoor Air Quality

For better filtration filter selection flexibility includes:
– MERV 7, 8, 11, 13, or 14 options with & without pre-fil-

ter. Microbial-resistant filter option is also an available
option.

– Featured Double-wall panel construction that eliminates

fibers in the supply air stream and is easy to clean.

– Provided with double-sloped, galvanized or stainless steel

drain pans eliminate stagnant water and minimizes bacte­rial growth.

• Quiet System Operation

– Provided by structural quality and specialized design.
– Recognized for quiet operation by renowned U.S. acous-

tical consultants.

– Provided with a SWSI airfoil plenum fan for excellent

acoustics and better efficiency

– Unit featured discharge plenum with sound baffles is an

available option for sound sensitive job

• Free Cooling

– Water or air economizer capability for optimized energy

savings.

– Economizer reduces compressor operating hours and

energy costs.

– Year-round “free cooling” capability.

• Efficient Part Load Operation

– System energy at part load operation is more efficient

than to central chilled water systems.

– Multiple systems and compressors versus a single, large

central plant.

– Efficient and reliable system for partial occupancy and

after hours operation.

– Operates only the system(s) on the floor(s) requiring after

hours use.

• Economical Integrated or Stand Alone DDC controls

– Monitoring and diagnostics reduce the potential for

expensive field repairs.

– Industry leading Protocol Selectability™ feature provides

effective BAS selection flexibility.

• Maintenance Costs Reduction

– No complicated central chiller plant to maintain.
– Service and maintenance are performed out of the occu-

pied space.

– Control and product reliability functions designed by the

equipment manufacturer for single source responsibility
and improved reliability.

• System Versatility

– Applicable to schools, offices, shopping centers, manu-

facturing facilities, etc.
– Prime candidate for floor by floor building renovation.
– Retrofit alternative where existing chiller cannot be

ed for replacement.

access

McQuay Catalog 860-9 3

McQuay Self-Contained Systems

McQuay Self-Contained Systems

SWP 012–130 Features and Options

Airfoil Plenum Fans

• SWSI fans more energy efficient and quieter than forward

curved fans

• Premium high efficiency open, drip-proof standard

motors and TEFC motors, an available option

• Seismic control restrained spring isolators are available

• Aerodynamically designed fan also available with 12

blades for even lower sound levels

Coils

• High efficiency enhanced corrugated fin design

• High coil performance and reduced static

pressure losses

• Interlaced and/or row split circuiting to keep

full face of the coil active and to eliminate air
temperature stratification and optimum part
load performance

Durable Construction

• Pre-painted or G90 galvanized steel exterior

cabinet panels

• Standard foam injected panels with R-13

insulation provide superior rigid double wall
construction and minimizes air leakage

• For better acoustics, an additional 2", 1. 5# density

R-8 fiberglass insulation is an available option for
fan and plenum sections

• Double-sloped drain pans help eliminates

standing stagnant water

Blank Sections

• Available to mount air blenders, carbon or

charcoal filters, sound attenuators or other
specialty equipment

• Allow customization for maximum system

performance and efficiency

• Can reduce design and installation costs

Scroll Compressor(s)

• Durable and reliable multiple compressors

• Lower operating cost with High EERs

• Customize selections to match specific

application

• Mounted on resilient rubber isolation for

smooth and quiet operation

Access Panels and Doors

• All panels and access doors shall be sealed

with permanently applied bulb-type gasket

• Access doors are flush mounted to cabinetry,

with hinges, latch and handle assembly

4 McQuay Catalog 860-9

Refrigerant Circuits

• Suction and discharge service valves, an available

option, to isolate each compressor

• Hot gas bypass, an available option, on units with

two refrigerant circuits

McQuay Self-Contained Systems

Shell and Tube Condensers

• Carbon steel Shell and Tube Condenser , non-

ferrous water channels and enhanced tubing for
high performance

• Integral sub-cooling circuit is provided as

standard to maximize efficiency

• Mechanically cleanable condenser and water

piping is rated for standard 300 psig waterside
working pressure & 450 psig is an available
option

• Two-way valve for head pressure control is

available for low condenser water temperatures

Multiple Filter Options

• 2" 30% (MERV7) and 75% (MERV13) filter s

• 4" 30% (MERV8), 65% (MERV1 1), 75% (MERV13)

and 85% (MER V14) longer lasting filters available

• 4" primary filters also available with 2" or 4" with

pre-filter

Economizer Options

• W aterside economizer effectively uses low cooling tower

water temperatures to offload compressor operation

• An airside economizer control package is available for

controlling field installed mixing dampers capable of 100%
outside airflow.

MicroTech® III Control System

• Factory-installed and tested to help minimize costly field

commissioning.

• Open Choices™ feature for easy integration into the BAS of

your choice using open, standard protocols such as BACnet®
or LONTALK®.

• Easily accessed for system diagnostics and adjustments via a

keypad/display on unit.

• Optionally add a remote keypad and display that is identical to

the unit mounted user interface.

Factory-Mounted Variable Frequency Drives

• Controlling fan motor speed can lower fan operating

costs and sound levels

• All VFD selections are plenum rated

• Manually activated bypass contactor is available to

allow system operation in the event of drive service

McQuay Catalog 860-9 5

McQuay Self-Contained Systems

McQuay Self -Contained SWP systems are built to perform,
with features and options that provide for lower installed and
operating costs, good indoor air quality, quiet operation and
longevity.

Cabinet, Casing and Frame

• Unit base constructed of 15-gauge and 10-gauge galvanized

steel for vibration control and rigging strength.

• Heavy-duty lifting brackets strategically placed for balanced

cable or chain hook lifting.

Figure 1: Low Leak Gasketed Frame and Foam Panels

• Unit cabinet constructed with foam insulation standard and

heavy gauge [pre-painted] [galvanized steel] exterior panels
for long equipment life.

• All sections have galvanized steel internal lining.

• 2-inch thick panels and access doors are thermal broke

double wall assembly, with [R-13 foam] [R-8 fiberglass].

• System components strategically located for ease of

inspection, serviceability and maintenance.

• Refrigeration components positioned out of the airstream so

adjustments and readings can be made without disrupting
system operation.

• Access doors flush mounted to cabinetry, with hinges, latch

and handle assembly.

• Doors on positive pressure sections are provided with

secondary latches to relieve pressure and prevent injury
upon access.

Figure 2: Hinged Access Doors with double latches

• Low leak gasketed frame channels minimize air leakage and

eliminates metal-to-metal contact between paneling and
frame work. Air leakage is only 0.5 cfm/square foot at 5"
cabinet pressure.

6 McQuay Catalog 860-9

McQuay Self-Contained Systems

Control Panel

Coil/Access
Section

Supply Fan
Section

Compressor/
Condenser
Section

Base Plates

Modular Design

• Optional modular construction unit shipped with a nitrogen

holding charge.

• Four distinct sections; coil/access section, supply fan

section, compressor/condenser section and the control panel.

Figure 3: SWP Modular Sections

• Insulated and segregated condensing section from the air

handling section to avoid transmission of noise to the
circulated air stream.

• Each refrigerant circuit is furnished with filter-drier, liquid

moisture indicator/sight glass , th erm a l ex pansion valve,
liquid line shutoff valve with charging port, high pressure
relief device and high and low pressure cutouts.

• If any compressor is made inoperable, the remaining

compressors are still allowed to operate.

• Thermal expansion valve capable of modulation from 100-

25% of its rated capacity.

• Hot gas bypass also available on units with two refrigerant

circuits.

Condensers

• All units feature carbon steel mechanically cleanable shell

and tube condenser.

• Includes non-ferrous water channels and enhanced tubing

for high performance.

• Serves an independent refrigerant circuit and includes a

spring loaded high pressure relief valve

• Integral sub-cooling circuit provided as standard to

maximize efficiency.

Compressor/ Condensing Section

Compressors

• All units feature multiple reliable scroll compressors for

• Suction and discharge service valves and gauge ports,

• Individual branch circuit fusing protects each compressor.

• T o prevent compressor short cycling, MicroTech® III

• Compressors mounted on resilient rubber isolation for

Figure 4: Compresors

efficient system part load control, quiet operation and
system redundancy.

available option, on each compressor.

control system incorporates timing functions.

smooth and quiet operation.

Figure 5: Condensers

• All units are leak tested, evacuated and shipped with a [full

operating charge of R-410A] [for modular design nitrogen
holding charge] and POE oil.

• Condenser assembly and all factory water piping rated for a

waterside working pressure of 300 psig as standard [450
psig] tested before shipment.

• Provided with a single supply and return water connections

• Unit available in both right-hand and left-hand piping

locations.

• Optional two-way valve provides accurate head pressure

control for condenser entering water temperatures as low as
40ºF.

McQuay Catalog 860-9 7

McQuay Self-Contained Systems

Refrig. Flow Ckt 1
Refrig. Flow Ckt 2

Ckt 2

Ckt 1

Ckt 1

Ckt 1

Ckt 1

Ckt 1

Ckt 1

Ckt 1

Ckt 1

Ckt 2

Ckt 2

Ckt 2

Ckt 2

Ckt 2

Ckt 2

Ckt 2

Airflow

Cooling Coils

Cooling Coil Section

• Large face area coils with high efficiency , enhanced copper

tubing and ripple corrugated aluminum fins.

• Features interlaced and/or row split circuiting to keep the

full face of the coil active and eliminate air temperature
stratification and optimum part load performance.

Figure 6: Evaporator Coil Circuiting

• 5 or 6 row evaporator coil with 12 fins/ inch spacing and

multiple face areas allows a custom match to specific design
loads.

• Provides low air pressure drop, high full and part load

operating efficiencies.

• Mounted in a [galvanized] [stainless steel ] cross broke and

double sloped drain pan with a full 2 inches of insulation.

• Compressor staging sequenced to take maximum advantage

of available coil surface.

• Each evaporator coil circuit furnished with a wide range

thermostatic expansion valve with an adjustable superheat
setting and external equalizer.

• An intermediate drain pan in the coil bank helps to provide

condensate removal without carryover.

Figure 7: Cooling Coil Section Shown

Supply Fan Section

• Single width, single inlet (SWSI) airfoil supply air fan

selections provide efficient, quiet operation at wide ranging
static pressure and air flow requirements.

• Each fan assembly is dynamically trim balanced at the

factory for quiet operation before shipment.

• All fan drives are factory sized according to job specific

airflow, static pressure, and power requirements.

• For seismic sensitive regions, spring fan isolators are

available with seismic restraints.

• 150% service factor drives extend service life of the fan

belts. Drive components and fan bearings are easily accessed
for periodic maintenance.

• Mounted on 2 inch deflection spring isolators for excellent

isolation effectiveness.

• Solid steel shafts rotating in 200,000 hour pillow block ball

bearings with grease fittings.

• Motor availability includes premium efficiency, open, drip-

proof, and totally enclosed selections; EPACT compliant
premium efficiency selections.

8 McQuay Catalog 860-9

Figure 8: Airfoil Fan

McQuay Self-Contained Systems

McQuay Plenum Fan

Least turbulance

and best acoustics

* Ceiling heights restrict “h” and
increase the problem with housed fans

Competitive Housed Fan

Excessive turbulance

and mediocre acoustics

Competitive Housed Fan

Worst turbulance

and worst acoustics

h*

Acoustical Advantages

McQuay SWP Self-contained units are provided with a high
efficient, SWSI airfoil plenum fan and have several acousti cal
advantages:

• Airfoil fans are more efficient than forward curved fans

contributing to less noise.

• For specific unit sizes, several fan diameters are available,

fan selection provides optimal efficiency.

Figure 9: Supply Fan Comparison

• Competitive supply duct work normally involves

discharging air vertically into a ceiling, then routing it
horizontally, Figure 10. McQuay’s plenum fan discharge has
far less velocity pressure than competitive housed fan
discharge, resulting in:

• 90º duct elbows that generate far less turbulance.

• Air flow that can be routed in any direction.

McQuay Catalog 860-9 9

McQuay Self-Contained Systems

McQuay Optional Plenum

“h” can be varied
to match ceiling height

h

Competition

Expansion Loss

90° Elbow Loss

Standard Exterior
Galvanized Surface

Standard Galvanized Liner

Standard Injected Foam Panel

Optional Fiberglass Insulation

Perforated Liner

Interior Optional

Acoustical Discharge Plenum

McQuay offers an optional acoustical discharge plenum,

Figure 10, that minimizes supply duct transition losses and

noise:

• Plenum fans pressurize the entire cabinet and have no

significant plenum air pressure drop (housed fans have
expansion, contraction and 90º elbow losses).

• Discharge plenums offered in any height to match ceiling

height.

• Custom size duct connections are available on any size

plenum.

Discharge Plenum with Foam Insulation and Sound
Baffles

Optional discharge plenum with foaminjected panels can be
provided with the additional sound attenuating baffle option
consisting of:

• Additional 2" of fiberglass insulation.

• Perforated liners, Figure 11.

Figure 10: Acoustical Discharge Plenum

Variable Air Volume Control

• Energy saving advanced technology variable frequency

drive (VFD), fan speed control is available with the
convenience and cost savings of factory mounting and
testing.

Figure 12: Variable Frequency Drive Controller

Figure 11: Foam Insulation and Sound Baffles

• All VFD selections are plenum rated and are conveniently

mounted within the control panel.

• MicroTech III controls provide advanced duct static pressure

control and controlled by either single or two-duct static
pressure sensors.

• A manually activated bypass contactor is available to allow

system operation even in the event of drive service.

• All VAV systems include an adjustable, duct high-limit

switch to protect duct work from excessive pressure.

Economizer Options

Waterside Economizer

• An energy saving, waterside economizer package, an

available option on all return air unit.

• Includes factory mounted 4-row [chemically cleanable coil]

[mechanically cleanable coil], control valves and piping.

• Rated for 300 psig as standard [450 psig] waterside working

pressure and the entire coil and piping assembly is factory
leak tested.

• Factory integrated MicroTech III controller to control

economizer operation and maximize free cooling potential.

• Unit enables economizer operation whenever cooling tower

water temperature is less than the unit entering air
temperature by a field adjustable value, generally 5-7°F.

10 McQuay Catalog 860-9

McQuay Self-Contained Systems

Mechanically Cleanable

Economizer Coil

• To save energy with a variable pumping system control

valves operation can be selected to maintain full flow
through the unit at all times or to isolate the unit from the
condenser water loop when there is no call for cooling.

• To extend free cooling savings, economizer operation can be

enabled during mechanical cooling.

• Unit enables mechanical cooling only when the economizer

valve is driven 90% open and cooling load is not satisfied.

• Economizer control will maintain full free cooling capability

until disabled by the economizer changeover set point.

• T o help protect against coil freeze-up an optional factory

mounted freeze stat is available.

Figure 13: Mechanically Cleanable Waterside
Economizer Coil

• To extend free cooling savings, economizer operation can be

enabled during mechanical cooling.

• Unit enables mechanical cooling only when the economizer

damper is driven 90% open and cooling load is not satisfied.

• Economizer control will maintain full free cooling capability

until disabled by the economizer changeover set point.

Condenser Head Pressure Control

• Unit requires condenser head pressure control for

applications where a waterside economizer package is not
being used and entering condenser water temperatures can
be less than 55°F.

• Optional two-way valve provides accurate head pressure

control for condenser entering water temperatures as low as
40degree F

Filter Section

• Selection flexibility includes face loaded rack with non-

gasketed frames and filter clips.

• Unit features 2-inch filter option available in 30% (MERV 7)

& 75% (MERV 13) nominal efficiency

• Longer lasting 4-inch filters higher filtration option is

available in 30% (MERV 8) & 65% (MERV 11), 75%
(MER V 13) & 85% (MERV 14) nominal efficiency with and
without 2-inch or 4-inch 30% pre-filter.

Airside Economizer

• A mixing box containing outdoor air, return air and exhaust

air dampers are available using the McQuay Vision™ air
handling unit platform.

• Factory integrated MicroTech III controller controls

economizer operation and maximize free cooling potential.

• Airside economizer control package available to control

field installed mixing dampers capable of 100% outside
airflow.

• Unit enables economizer operation whenever outside air

enthalpy , comparative enthalpy or dry bulb temperature
changeover provides control flexibility to bring in most
amount of outside air for free cooling.

• Economizer damper control actuator modulates in response

to the cooling load.

• MicroTech III controller positions outside air damper to

maintain minimum ventilation requirements when
economizer is not in operation.

Figure 14: 4 Inch Filters

Blank Sections

• Available to mount air blenders, pre-heat coils, sound

attenuators or other specialty equipment using the McQuay
Vision™ air handling unit platform and shipped loose.

• Allow customization for maximum system performance and

efficiency and reduce design and installation costs.

McQuay Catalog 860-9 11

McQuay Self-Contained Systems

Electrical

• Units are completely wired and tested at the factory prior

shipment.

• Wiring complies with NEC requirements and all applicable

UL standards.

• For ease of use, wiring and electrical components are

number coded and labeled according to the electrical
diagram whenever applicable.

• Supply air fan motors, compressor motors and electric heat

all branch circuits have individual short circuit protection.

• Control circuit power is supplied through a factory installed,

low voltage transformer.

• The supply fan motor circuit includes a three phase

contactor and ambient compensated overload protection
with manual reset.

• Each refrigerant circuit includes both a high and low

pressure cutout switch.

• A terminal block is provided for the single, main power

connection and a terminal board is provided for low voltage
control wiring.

• A factory mounted, non-fused main circuit interrupter is

available for disconnecting the main electrical power to the
unit.

• Dual power blocks or disconnect switches are available to

accommodate requirements for standby, emergency power
supplies.

Heating Section

Hot Water Heat

• Multiple coil selections offered to size heating output to

application needs.

• Hot water coils are 5/8-in. O.D. copper tube/ aluminum fin

design with patented HI-F5 fins.

• Rated in accordance with ARI Standard 430.

• Pre-heating control fully integrated into the unit’s

MicroTech III control system is available using the McQuay
Vision™ air handling unit platform.

• Available with factory-mounted freezestat.

Steam Heat

• Steam heating coils are 5/8-in. O.D. copper tube/aluminum

fin jet distributing type with patented HI-F5 fin design.

• Rated in accordance with ARI Standard 430.

• Multiple different steam coil selections offered to size

heating output to application needs.

• Pre-heating control fully integrated into the unit’s

MicroTech III control system is available using the McQuay
Vision™ air handling unit platform.

• Available with factory-mounted freezestat.

Electric Heat

• Factory assembled, installed and tested.

• Two stage capability for application flexibility.

• Durable low watt density nickel chromium elements for

longer life.

• Entire heat bank protected by a linear high limit control with

each heater element protected by an automatic reset high
limit control.

• Fuses provided in each branch circuit.

12 McQuay Catalog 860-9

System Flexibility with Unit Options

Along with providing high quality and state-of-the-art
innovation, SWP self-contained systems offer customized
flexibility to satisfy a wide range of diverse applications.

System Flexibility with Unit Options

discharge orientations. Piping and fan arrangement flexibility
can simplify mechanical equipment room arrangement,
improve installation costs, and total system performance.

Selection/Application Flexibility

Nominal cooling capacities range from 12 to 130 tons. In
addition, all units offer multiple compressor selections to meet
exacting system requirements. The flexibility to optimize the
self-contained system to fit the application is a McQuay SWP
advantage. Available system applications include the
following:

• VAV dischar ge air temperature control with static pres­sure control.

• Discharge air temperature control with constant air vol­ume.

• Constant volume, zone temperature control.

• 100% outside air control.

• Dehumidification control, with or without reheat control.

In addition to compressor/coil flexibility, SWP systems offer
single width, single inlet, air foil fans with factory-mounted
variable frequency drives for maximizing VAV system fan
performance. High efficiency fan capability coupled with
extensive compressor flexibility provide the right system
selection for the application.

Arrangement Flexibility

All SWP systems offer the flexibility of right-hand and left­hand piping and control panel arrangements and multiple fan

Optimal Discharge Air Temperature

More and more system engineers are designing optimal
discharge air temperature systems to improve system
performance and system first cost; the McQuay SWP provides
the flexibility to do it successfully. Optimal discharge air
temperature systems are designed to provide unit leaving air
temperature selections of 52°F to 53°F versus more
conventional systems that supply air at temperatures closer to
58°F . This five to six degree reduction in air temperature to the
room diffusers can subsequently reduce the required supply air
volume to the room by 20% to 25%.

The benefits of optimal discharge air temperature systems
become quite apparent with a look at the advantages offered
with reduced supply air cfm airflow:

• Reduced first cost and installation cost by allowing
smaller duct sizes and a smaller air distribution system.

• Reduced bhp requirements. Depending on changes in
duct size and the resulting total static pressure, a 20%
reduction in supply air cfm can reduce fan bhp require­ments by 25% or more.

• Reduced fan sound power generation and a quieter room
environment.

• Reduced equipment room size may be possible due to
using a physically smaller unit size.

• Filtration Flexibility.

McQuay Catalog 860-9 13

System Flexibility with Unit Options

Controllers

MicroTech III DDC control systems provide constant volume,
variable air volume, 100% outside air, and/or dehumidification
control flexibility . See “MicroTech III Unit Controller” section
for more information.

Summary of Available Options

• Multiple different compressor/coil capacity selections

• Mult ip le control options: VAV, CV, 100% O A, dehumidi­fication

• Nonfused main power disconnect switch

• Dual nonfused main disconnect switches

• Nonaveraging freezestat for hot water or waterside econ­omizer coil protection

• Unit phase failure/under voltage protection

• Premium efficiency fan motors

• TEFC fan motors

• Condenser water flow switch

• 4-row waterside economizer system

• Air cycle economizer system

• Modulating hot water heat control

• Staged electric heat

• Multi direction, acoustic discharge plenum

• Factory-mounted and factory-controlled variable fre­quency drives

• High efficiency filtration options

• Right-hand and left-hand piping se lections

• Multiple fan discharge arrangements

• Head pressure control valve

• Special coil coatings

• Double wall cabinet construction

• Seismic fan isolation

• Independent refrigerant circuit units offer the following
options:

• Five-row or six-row DX coils with enhanced heat trans­fer surfaces

• R-410A refrigerant

• Service and shut off valves on liquid and discharge

Figure 15: MicroTech III DDC Co ntroller

R-410A Refrigerant

McQuay SWP units with independent refrigerant circuits are
available with non-ozone depleting R-410A refrigerant.

Features

• R-410A refrigerant is environmentally friendly with zero
ozone depleting allowance (ODP). Customers have no
phase out and replacement concerns.

• Units are factory engineered for proper cooling perfor­mance using R-410A.

• R-410A efficiency is excellent. McQuay R-410A SWP
units are available with EERs that exceed ASHRAE 90.1-

2010.

• Units are factory charged with R-410A and synthetic oil
(such as POE), and they include components and controls
specifically tailored to R-410A.

• R-410A refrigerant is a blend, but the glide is negligible.
This is not true for R-407C. If R-407C leaks, the remain­ing charge may not have a proper mix of components. R­410A does not have this problem so leaks are easier to
repair.

• Units are factory tested prior to shipment.

14 McQuay Catalog 860-9

MicroTech III Unit Controls

McQuay SWP systems continue to provide industry leading
performance, equipped with a complete MicroTech III control
system. In addition to providing stable, efficient temperature,
and static pressure control, the controller is capable of
providing comprehensive diagnostics, alarm monitoring, and
alarm specific component shutdown if critical equipment
conditions occur. The unit controllers are factory mounted and
configured for stand-alone operation or integration with a
building automation system (BAS) through an optional
communication module with our Open Choices feature.

Open Choices Benefits for Easy Integration

Easy, low cost integration into most building automation
systems without costly gateway panels.

• Flexibility to select either BACnet® or L

communication. Units are LonMark® 3.4 certified with the
appropriate communications module for L
networks.

• Comprehensive unit control and status information is

available at the BAS regardless of communication protocol.

• Long-term choices for equipment adds or replacements, and

for service support.

• Flexible alarm notification and prioritization with Intrinsic

Alarm Management (BACnet).

• Simplified BAS integration with the ability to set network

parameters at the unit controller, reducing installation time
and costs.

• Easy monitoring and troubleshooting of communication

status from the unit controller to the BAS.

ONWORKS®

ONWORKS

MicroTech III Unit Controls

Components

Each SWP self-contained system is equipped with a complete
MicroTech III unit control system that is pre-engineered,
preprogrammed, and factory tested prior to shipment. Each of
the MicroTech III unit control systems is composed of several
components that are individually replaceable for ease of
service. These components include:

• Unit controller with user interface display and navigation
wheel

• Optional expansion modules

• Communication module (optional)

• Pressure transducers

• Unit-mounted temperature sensors

• Zone temperature sensor packages

• Humidity sensor

Main Control Board (MCB)

The main control board (MCB) contains a microprocessor that
is preprogrammed with the software necessary to control the
unit. This provides that schedules, set points and parameters
are not lost, even during a long-term power outage. The
microprocessor board processes system input data and then
determines and controls output responses. An RS-232
communication port is provided as standard to allow for direct
or modem access with a PC-based service tool.

Expansion Modules

These boards are used to expand the input and output
capability of the unit controller. Each board communicates via
serial data communications. These microprocessor based
boards provide independent operation and alarm response even
if communication is lost with the unit controller.

Communication Module

An optional communication module provides the means to
factory or field configure MicroTech III unit controls for
interoperability with an independent BAS. Communication
modules are available to support industry recognized
communication protocols including BACnet MS/TP, BACnet/
IP and L

Figure 16: MicroTech III Keypad Display

McQuay Catalog 860-9 15

ONWORKS.

MicroTech III Unit Controls

Keypad/Display

All MicroTech III unit controllers include a push/pull
navigation wheel and display. The display is a supertwist
nematic type with highly visible black characters on a yellow
background. The 5-line by 22-character format allows for easy
to understand plain English display messages. All operating
conditions, system alarms, control parameters and schedules
can be monitored from the keypad/display. If the correct
password has been entered, any adjustable parameter or
schedule can be modified from the keypad.

Temperature and Humidity Sensors

With the exception of the zone, outside air and return air
sensors, all temperature sensors are factory installed and
tested. Zone sensor packages are available to suit any
application. A humidity sensor is available for field
installation.

Static Pressure Transducers

All pressure transducers are factory installed and tested.
Connection and routing of field-supplied sampling tubes is
done at time of unit installation.

Zone Temperature Sensors

Two optional zone temperature sensors are available:

• Zone sensor with tenant override switch

• Zone sensor with tenant override switch and remote set
point adjustment

Timed tenant override is a standard MicroTech III
control feature.

Zone sensors are required for the controller’s purge cycle,
space reset of supply air set point, and night setback or setup
features. All zone sensors are field installed with field wiring
terminated at a separate, clearly marked terminal strip.

Stand-alone Controller Features

MicroTech III applied rooftop unit controls includ e all of th e
essential features required to make them capable of completely
independent, stand-alone operation.

Internal Time Clock

An internal, battery-backed time clock is included in the
MicroTech III unit controller. Current date and time can be
quickly and easily set at the user interface keypad.

Internal Schedule

Seven daily schedules and one holiday schedule can be entered
at the keypad of all unit controllers. For each of these eight
schedules, one start and one stop time can be entered. Up to 10
holiday periods, of any duration, can be designated. The unit
will automatically run according to the holiday schedule on the
holiday dates. To handle special occasions, an additional ‘one
event’ schedule can also be used.

In lieu of its internal schedule, the unit can be operated
according to a network schedule from a BAS.

External Time Clock or Tenant Override Input

An input is supplied that can be used to accept a field wired
start/stop signal from a remote source. An external time clock,
a tenant override switch, or both may be connected. Whenever
the external circuit is closed, the controller overrides the
internal schedule (if activated) and places the unit into the
occupied mode.

If the internal schedule or a BAS network schedule is used,
field wiring is not required.

Timed Tenant Override

Off-hour operation flexibility is a must in today’s office
environments and even stand-alone MicroTech III controls
handle it with ease. When unit operation is desired during
unoccupied hours, initiate timed tenant override by pressing
the tenant override button on either of the optional zone sensor
packages. The unit then starts and runs in the occupied mode
for a keypad-adjustable length of time (up to five hours ). If th e
button is pressed again while the unit is operating, the timer
resets to the full time allowance without interrupting unit
operation. Tenant override operation also can be initiated by a
BAS.

Three Remote Set Point Adjustment Options

1 Remote user interface option (RUI).
2 Building automation system (BAS). See “Open Choices

Benefits for Easy Integration” on page 15.

3

All constant air volume-zone temperature control (CAV­ZTC) unit controllers include an input that can be used to
remotely adjust the zone cooling and heating set points.
To use this feature, wire the optional zone sensor
package with set point adjustment to the controller. The
remote set point adjustment feature can be enabled or
disabled from the keypad at any time. When enabled,
remote set point adjustment is available even if the return
temperature is selected to be the Control Temperature.

16 McQuay Catalog 860-9

MicroTech III Unit Controls

Auto/Manual Operation Selection

Automatic or manual operation can be controlled either
remotely or at the keypad.

All controllers include three inputs that can be used to enable
or disable cooling, heating, and fan operation from remote
switches. With the “heat enable” and “cool enable” terminals,
the operator can enable cooling, heating, or both as desired.
Using the system “off” terminals, the operator can disable the
fans, and thus the entire unit.

From the keypad, there are a variety of occupancy and auto!
manual control mode selections available to the operator:

• Occupancy modes
– Auto
– Occupied
– Unoccupied
– Bypass (tenant override)

• Control modes
– Off manual
– Auto
– Heat/cool
– Cool only
– Heat only
– Fan only

Compressor Lead-lag Selection

All unit controllers are capable of automatic compressor, lead­lag control.

Waterside Economizer Changeover

On units equipped with a waterside economizer package, the
MicroTech III unit controller includes an internal changeover
strategy that compares entering cooling tower water
temperature to the unit’s mixed air temperature. If the entering
water temperature is less than the mixed air temperature by a
field-adjustable differential (typically 5°F to 7ºF), the
economizer control valve modulates in response to the cooling
load.

Airside Economizer Changeover Selection

On units equipped with an economizer, there are three methods
of determining whether the outdoor air is suitable for free
cooling: two methods sense enthalpy (dry bulb temperature
and humidity) and one senses outdoor air dry bulb
temperature.

The two enthalpy changeover methods use external, factory
installed controls. One compares the outdoor ambient enthalpy
to a set point; the other is a solid state device that compares the
outdoor ambient enthalpy to the return air enthalpy. This

comparative enthalpy control can improve total economizer
performance.

All unit controls include an internal dry bulb changeover
strategy that can be selected at the keypad. When this method
is selected, the controller compares the outdoor air dry-bulb
temperature to a keypad programmable set point. The external
enthalpy control input is then ignored.

Cooling and Heating Lockout Control

All unit controls include separate keypad programmable set
points for locking out mechanical cooling and heating.
Mechanical cooling is locked out when the outdoor
temperature is below the cooling lockout set point; heating is
locked out when the outdoor temperature is above the heating
lockout set point. This feature can save energy cost by
eliminating unnecessary heating and cooling during warm-up
or cool-down periods or when the outdoor ai r tem perature is
mild.

Night Setback and Setup Control

When one of the zone temperature sensors is connected to the
unit controller, night setback heating and night setup cooling
control are available. Separate, keypad programmable night
heating and cooling set points are used to start the unit when
necessary. After the unit starts, night setback and setup control
is similar to normal occupied control except that the minimum
outside air damper position is set to zero. If the outside air is
suitable for free cooling, it is used during night setup
operation.

Except for 100% outside air applications, night setback control
is available even if the unit is not equipped with any heating
equipment. When the space temperature falls to the night
setback set point, the fans simply start and run until the
temperature rises above the differential. This feature might be
useful for applications that use, for example, duct-mounted
reheat coils.

Morning Warm-up Control

If the Control Temperature (space or return) is below set point
when the unit enters the occupied mode, the morning warm-up
control function will keep the outs
heat is supplied to satisfy set point. The outside air damper will
remain closed until either the space temperature rises to the

heating set point or the keypad adjustable morning warm-up
timer expires (default is 90 minutes). The morning warm-up
timer supplies the minimum required amount of outdoor air
after a certain time regardless of the space temperature.

Morning warm-up control is automatically included on all
except 100% outside air units. It is available even if the unit is

ide air dampers closed while

McQuay Catalog 860-9 17

MicroTech III Unit Controls

Condenser Head Pressure Control (units without
waterside economizer only)

Mechanical cooling is allowed whenever the entering cooling
tower water temperature is 55ºF or warmer, without the use of
head pressure control. When the entering water temperature is
below 55ºF , a factory-installed and factory-controlled two-way
modulating head pressure control valve can be utilized. The
regulating valve is controlled by the MicroTech III controller
to maintain refrigerant head pressure.

Outdoor Air Purge Control (units with airside
economizer only)

Purge control is designed to take advantage of cool early
morning outside air conditions. It starts the fans and modulates
the economizer dampers to maintain occupied cooling
requirements during unoccupied periods, if conditions are
appropriate. This provides the opportunity to flush the space
with fresh outdoor air prior to occupancy. Purge operation is
possible only during a keypad-adjustable time window prior to
occupancy (0 to 240 minutes). When the purge-cycle is active,
mechanical cooling is disabled. To use the purge feature,
connect one of the zone temperature sensors to the unit
controller. Below is a description of purge control operation.

During the purge time window, the unit starts and runs
whenever these three requirements are met:

• The space temperature must be warm enough to enable
occupied cooling.

• The outside air enthalpy must be low enough to enable
the economizer.

• The outside air temperature must be at least 3°F less than
the space temperature.

When any one of these conditions is no longer true, the unit
shuts down. As conditions allow, purge cycles the unit in this
manner until it enters the occupied mode.

Proportional Integral (PI) Control

The Proportional Integral (PI) control algorithm controls
modulating actuators to maintain a measured variable
(temperature or pressure) at or near its set point. For example,
it controls economizer dampers to maintain the discharge
cooling set point and it controls the supply fan variable
frequency drives to maintain the duct static pressure set point.
The integral control feature effectively eliminates
“proportional droop” (load dependent offset) resulting in the
tightest possible control.

For each PI loop, four keypad adjustable parameters allow the
control loop to be properly tuned for any application:

•Period

• Dead band

• Proportional band

• Integral time

Appropriate default values for these parameters are loaded into
each controller. These default values will provide proper
control for most applications; therefore, field tuning is usually
not required and thus start-up time is reduced.

Change Algorithm

The PI function is also used to adjust set points instead of
controlling variable speed drives or actuators directly. For
example, in zone control applications, the PI loop
automatically “changes” the discharge temperature set point
(cooling or heating) as the Control Temperature deviates from
the zone set point. Another PI loop then controls the
economizer actuator or heating valve actuator using the current
discharge temperature set point. Unlike a typical
“mastersubmaster” reset strategy, this “cascade control”
continuously adjusts the discharge set point, even if the
Control Temperature’s deviation from set point remains
constant. This means that the unit’s cooling or heating output
is set according to the actual load, not just the current zone
temperature. The tightest possible zone temperature control
results because “proportional droop” (load dependent offset) is
eliminated.

Calibrate

When initiated at the keypad by an operator, the Calibrate
function automatically calibrates all actuator position feedback
inputs and all pressure transducer inputs. It does this by
shutting the unit down and then driving all actuators to the full
closed and full open positions. The controller records the input
voltage values that correspond to these positions. The pressure
transducer input voltages, which are assumed for 0.00-in.
W.C., are also recorded. When Calibrate is finished, enter an
operator command at the keypad to start the unit.

Field Output Signals

All MicroTech III controls include two solid-state relay
outputs that are available for field connection to any

suitable device: the remote alarm output and the occupied
output. These two outputs are used to signal field equipment of
unit status.

Remote Alarm Output: The remote alarm output can be
used to operate a 24 volt relay to provide a remote alarm
signal to a light, audible alarm,
alarm condition exists at the unit.
Fan Operation Output: The fan operation output is used
to operate a 24 volt relay to control field equipment that
depends on fan operation; for instance, to open field
installed isolation dampers or VAV boxes. To allow actua­tors enough time to stroke, the fan operation output is
energized three minutes before the fans start. It then
remains energized until thirty seconds after the unit air­flow switch senses no airflow. The fan operation output is
on whenever the unit airflow switch senses airflow.
Outside Air Damper output: Use to signal an outside air
damper actuator to open whenever the unit is in an occu­pied cooling or heating condition.

or other device when an

18 McQuay Catalog 860-9

MicroTech III Unit Controls

Standard Control Options

SWP Self-Contained systems are available for most any
constant or variable air volume application. MicroTech III
controls offer three basic control configurations that use
sophisticated state change control logic to provide stable,
reliable and efficient control:

• Variable air volume with discharge temperature control
(DAC)

• Constant air volume with zone temperature control (S
CC)

• Constant air volume with discharge temperature control
(DAC)

When combined with MicroTech III’s many available control
capabilities, both factory-installed and keypad-programmable,
these three basic configurations can be customized to meet the
requirements of the most demanding applications.

Variable Air Volume with Discharge Temperature
Control (DTC)

All VAV units provide true discharge temperature control in
addition to duct static pressure control. Cooling only, cooling
with single-stage “morning warm-up” heat, and cooling with
modulating heat configurations are available.

Control Temperature

The Control Temperature make s the heat/cool changeover
decision. It determines whether cooling or heating is enabled;
the discharge temperature then determines whether cooling or
heating is actually supplied. At the keypad, the operator can
choose the source of the Control Temperature from among the
following selections.

• Space temperature sensor

• Return temperature sensor

• Outside air temperature sensor (modulating heat only)

• Network communication

The operator enters separate cool and heat enable set points
and deadbands that the Control Te mperature is compared with
(see Figure 17). When the Control Temperature is greater than
or equal to the cooling set point plus DB/2, cooling is enabled.
When the Control Temperature is less than or equal to the heat
set point minus DB/2, heating is enabled. If desired, these set
points and differentials can be set so that there is a dead band
in which both cooling and heating are disabled. The
controller’s software prevents simultaneous cooling and
heating.

Figure 17: Control Temper a ture Logi c

Constant Air Volume with Zone Temperature Control
(SCC)

SCC units are available in either cooling only or cooling with
modulating heat configurations. Either of these configurations
is available for 100% recirculated, mixed, or 100% outdoor air
applications.

Constant Air Volume with Discharge Temperature
Control (DTC)

DTC units are available in cooling only, cooling with single­stage “morning warm-up” heat, or cooling with modulating
heat configurations. This unit configuration can be used for
applications that have zone controlled terminal heating coils or
for constant volume, 100% outdoor air applications. The
discharge temperature control strategies used with the hybrid
DTC unit are identical to those used with the DTC unit.

Discharge Temperature Control

MicroTech III VAV-DTC and CAV-DTC controls provide
sophisticated and flexible discharge air temperature control
that is only possible with DDC systems. Separate discharge air
temperature set points are used for cooling and modulating
heating control. At the keypad, the operator can either enter the
desired set points or select separate reset methods and
parameters for each set point.

Proportional Integral Modulation

When operating in economizer free cooling or unit heating, the
previously described PI algorithm maintains discharge
temperature control. It provides precise control of the
economizer dampers, modulating gas heat, steam or hot water
valves.

Compressor Staging

Two staging algorithms are available to control a unit’s
multiple steps of capacity control, Degree-Time (also known
as “average”) and Nearest. These control algorithms provide
reliable discharge temperature control while managing
compressor cycling rates. Constraints on compressor staging
are essential for preventing short cycling, which can reduce
compressor life by causing improper oil return and excessive
heat buildup in the motor windings.

The Degree-Time Compressor staging algorithm keeps track
of the discharge temperature and stages cooling up or down to
maintain an average temperature that is equal to the discharge

McQuay Catalog 860-9 19

MicroTech III Unit Controls

cooling set point. A stage change can occur only (1) after the
keypad adjustable inter-stage timer has expired (f ive minute
default setting) and (2) if the discharge temperature is outside a
keypad programmed dead band. After these two conditions
have been met, staging occurs as the controller attempts to
equalize two running totals: degree-time above set point and
degree-time below set point. The result is that the average
discharge temperature is maintained at the cooling set point.

The Nearest Compressor staging algorithm keeps track of the
discharge temperature and stages cooling up or down to
maintain the discharge temperature as close as possible to set
point. A stage change can occur only (1) after the keypad
adjustable inter-stage timer has expired (five minute default
setting) and (2) if the control logic calculates that a stage
change will result in a discharge temperature closer to set point
than the existing condition. The controller logic continually
calculates the expected effect of a stage change and uses this
information before making a change. A change is made only if
it will bring the discharge temperature closer to set point,
resulting in a more consistent discharge temperature, reduced
compressor cycling and more stable control VAV box control.

Supply Air Reset

By automatically varying the discharge air temperature to suit
a building’s cooling or heating needs, supply air temperature
reset can increase the energy efficiency of VAV and CA V-DTC
systems. MicroTech III controllers offer a variety of different
reset strategies that can be selected at the keypad. Because
they are keypad programmable, reset strategies can be changed
or eliminated as desired. Separate strategies can be selected for
both cooling and modulating heat. If reset is not desired, a
fixed discharge cooling or heating set point can be entered.

The following reset methods are available:

• Space temperature

• Return temperature

• Outdoor air temperature

• Supply airflow (VAV, cooling set point only)

• External 0–10 VDC or 0–20 mA signal

• Network communication

For all temperature reset methods, the mini mum and maximum
cooling and heating set points are keypad programmable along
with the corresponding minimum and maximum space, return
or outdoor air temperature parameters. For the supply airflow
method, the discharge set point will be reset as the supply fan
modulates between 30% adjustable and 100% adjustable. For
the external method, the discharge set point will be reset as the
voltage or current signal varies over its entire range. For units

in a BAS network, the discharge set points are reset via the
communication signal.

Zone Temperature Control

MicroTech III CAV-ZTC controls provide the sophisticated
and flexible zone temperature control that is only possible with
DDC systems. Zone temperature sensors are available with or
without a remote set point adjustment. With the remote
adjustment model, the space set point can be set at the keypad
or at the zone sensor package. Even if a zone sensor is
connected, remote set point adjustment can be enabled or
disabled as desired at the keypad.

Control Temperature

The Control Temperature is the representative zone
temperature. When compared with the zone set points, the
Control Temperature determines whether the unit supplies
heating, cooling, or neither. It also determines the amount of
cooling or heating required to satisfy the load. Its source can
be selected at the keypad from among the following selections:

• Zone temperature sensor

• Return temperature sensor

Because it is the representative zone temperature, the Control
Temperature is the primary input to the MicroTech III zone
temperature control algorithms. Control Temperature
parameters are described below. The controller’s software will
prevent cooling and heating from being inadvertently enabled
at the same time.

Change and Proportional Integral Modulation

When economizer “free” cooling or unit heating is required,
the two MicroTech III PI loops combine for cascade-type
control, providing the tightest possible zone temperature
control. By controlling the discharge temperature along with
the zone temperature, these functions eliminate temperature
variations near the diffusers that could otherwise occur as a
result of traditional zone control’s inherent lag effect.

Change: If the Control Temperatur e is above or below the
set point by more than the dead band, the Change PI loop
periodically adjusts the cooling
temperature set point either up or down as necessary. The
amount of this set point change corresponds to the Control
Temperature’s position in the modulation range. The far­ther the Control Temperature is from the set point, the
greater the discharge set point change will be. The
Change-adjusted discharge cooling and heating set points
are limited to ranges defined by keypad programmable
maximum and minimum values.
PI: Using the Change function’s current discharge set
point, the PI function maintains precise discharge temper-

or heating discharge air

20 McQuay Catalog 860-9

MicroTech III Unit Controls

Compressor Staging

Compressor staging is controlled directly by the Control
Temperature. When the Control Temperature is warmer than
the zone cooling set point, cooling is staged up; when the
Control Temperature is cooler than the zone cooling set point,
cooling is staged down. However, a stage change can only
occur when the Control Temperature is outside the dead band
(see Figure 18). Staging is constrained by an inter-stage delay
timer (five minute default setting) and minimum and
maximum discharge air temperature limits (all keypad
programmable). These constraints protect the compressors
from short cycling while eliminating temperature variations
near the diffusers.

Figure 18: Compressorized Logic

Project Ahead Algorithm

Because the inherent lag effect in zone temperature control
applications can cause overshoot during warm-up or cool­down periods, MicroTech III features a “Project Ahead”
control algorithm. Project Ahead calculates the rate at which
the Control Temperature is changing and reduces the unit’s
cooling or heating output as the zone temperature nears its set
point, essentially eliminating overshoot.

Duct Static Pressure Control

On all VAV-DTC units, duct static pressure control is
maintained by the PI algorithm, which provides precise control
of the supply fan variable speed drive. The keypad
programmable set point can be set between 0.20-in. W.C. and

4.00-in. W.C.
On larger buildings with multiple floors, multiple trunk runs or

large shifts in load due to solar effects (east/west building
orientation), an optional second duct static sensor is offered.
The MicroT ech III controller automatically selects and uses the
lower of the two sensed pressures to control fan volume to
provide adequate static pressure to the most demanding space
at all times.

Operating States

Operating states define the current overall status of the self­contained system. At the user interface, the operator can
display the current operating state and thereby quickly assess
the unit’s operating condition.

Alarm Management and Control

MicroTech III unit controllers are capable of sophisticated
alarm management and controlled response functions. Each
alarm is prioritized, indicated, and responded to with the
appropriate action. The active alarm (up to 10 alarms, arranged
by alarm priority) and previous alarm (up to 25 alarms, arrange
by date/time cleared), each with a time and date stamp, can be
displayed at the user interface. Generally speaking, whenever a
current alarm is cleared, it is logged as a previous alarm and
the oldest previous alarm is removed.

Alarm Priority

The various alarms that can occur are prioritized according to
the severity of the problem. See Table 1. Three alarm
categories are used: faults, problems, and warnings.

1 Faults are the highest priority alarms. If a fault condition

occurs, the complete unit shuts down until the alarm
condition is gone and the fault is manually cleared at the
keypad. A fault example is Fan Fail alarm.

2 Problems are the next lower priority to alarms. If a

problem occurs, the complete unit does not shut down,
but its operation is modified to compensate for the alarm
condition. A problem automatically clears when the
alarm condition that caused it is gone. Compressor Fail is
an example of a problem where only the affected
compressor is shut down.

3 Warnings are the lowest priority alarms. No control

action is taken when a warning occurs; it is indicated to
alert the operator that the alarm condition needs
attention. To make sure that they are read, the operator
must manually clear all warnings. Dirty Filter indication
is an example of a warning.

Generally, a specific alarm condition generates an alarm that
falls into only one of these categories. Under different sets of
circumstances, however, the freezestat and most of the sensor
failure alarm conditions can generate alarms that fall into
multiple categories.

McQuay Catalog 860-9 21

MicroTech III Unit Controls

Adjustable Alarm Limits

Four alarm indications have adjustable limits that are used to
trigger the alarm. The high return temperature alarm and the
high and low supply temperature alarms are adjusted at the
user interface. The dirty filter alarm(s) is adjusted at the
sensing device.

Table 1: MicroTech III Alarm Summary

Alarm Name Fault Problem Warning

Freeze X X
Smoke X

Temperature Sensor

Failure

Duct High Limit X

High Return Temperature X

High Discharge

Temperature

Low Discharge

Temperature

Fan Failure X

Fan Retry X

Discharge Air Capacity

Feedback

Economizer Stuck X X

Auxillary Control Board

Enabled

Low Airflow X

Circuit 1–8

High Pressure

Circuit 1–8

Low Pressure/Frost

Compressor 1–8 Motor

Protection

Compressor 1–8 Failure X

Airflow Switch
(False Airflow)

Dirty Filter X

XX

X

X

X

X

X

X

X

X

22 McQuay Catalog 860-9

Application Considerations

Evaporator Coil

Motor

Control Panel

Airflow

24"

See Note

18"

or

24"

36"

42"

Rear Side

Front Side

Opposite

Access

Side

Access

Side

NOTE: If water and condenser drains are on the motor side, 24" is required.

This section contains basic application and installation
guidelines to consider as part of the detailed analysis of any
project.

General

Units are intended for use in normal heating, ventilating, and
air conditioning applications. Consult your local McQuay sales
representative for

• Applications involving operation at high entering con­denser water temperatures; high altitudes; or noncata­loged voltages.

• Applications requiring modified or special control
sequences.

• Job-specific unit selections that fall outside of the range
of the catalog tables, such as 100% outside air applica­tions.

For proper operation, rig units following instructions in IM

1032. If fire dampers are required, install them in the ductwork
according to local codes. Space is not provided for these
dampers in the unit.

Explicitly follow factory check, test, and start procedures for
satisfactory start-up and operation (see IM 1032).

Many self-contained system applications take advantage of the
significant energy savings provided by the use of economizer
operation. When a water economizer system is used,
mechanical refrigeration typically is not required below an
entering condenser water temperature of 55°F. Standard
McQuay self-contained systems are designed to operate with
entering water temperatures down to 50°F when a water
economizer is used and 55°F with no water economizer. For
applications where a water economizer system cannot be used,
a modulating head pressure control system is available to
permit operation at entering condenser water temperatures
below 55°F.

Application Considerations

Unit Location

The floor must be structurally strong enough to support the
unit with minimum deflection (see “Unit Weights” starting on

page 66). Provide proper structural support to minimize sound

and vibration transmission. Consider a concrete floor. Extra
design consideration is required when installing on a wooden
structure. Install units level from front-to-back and over their
length.

Locate unit fresh air intakes away from building flue stacks,
exhaust ventilators, and areas containing automot i ve or other
exhaust to prevent the possible introduction of contaminated
air to the system. Consult code requirements for minimum
fresh air volumes.

Allow sufficient space around the unit for service and
maintenance clearance. Refer to Figure 19 for recommended
service/maintenance clearances and “Recommended
Clearances” on page 61. Locate equipment room access doors
in a manner that can assist in service access if needed (e.g.,
coil removal). Contact your local McQuay sales representative
if reduced service/maintenance clearances are required.

Where code considerations such as the NEC require extended
clearances, they take precedence over minimum service/
maintenance clearances.

Figure 19: Recommended Service and Maintainance
Clearances

McQuay Catalog 860-9 23

Application Considerations

Acoustical Considerations

Good acoustical design is a critical part of any successful
installation and should start at the earliest stages in the design
process. Each of the four common sound paths must be
addressed. They are:

• Radiated sound through the casing of the unit

• Structure-borne vibration

• Airborne sound through the supply air duct

• Airborne sound through the return air duct

Basic guidelines for good acoustical performance include:

1 Always provide proper structural support under the unit.
2 Provide adequate mass in the floor structure, especially

when located over an occupied space where good
acoustics are essential.

3 Seal all supply and return air duct penetrations once the

duct is installed.

4 Don’t overlook the return air path. Always include some

duct work (acoustically-lined drop down elbow) at the
return inlet.

5 Minimize system static pressure losses to reduce fan

sound generation.

6 Select the appropriate unit/fan for the application. Select

fans as close as possible to their peak static efficiency . T o
assist you, peak static efficiency is identified by the first
system curve to the right of the shaded “Do not select”
region on each fan curve. See page 54 through page 60.

7 Design duct systems to minimize turbulence.
8 Account for low frequency duct breakout noise in system

design. Route the first 20' of rectangular duct over
nonsensitive areas and avoid large duct aspect ratios.
Consider round or oval duct to reduce breakout.

Equipment Room

Locate the equipment room away from sound sensitive areas.
Whenever possible, isolate the equipment room from these
areas by locating restrooms, utility rooms, stairwells, hallways,
elevators, etc. around its perimeter. This allows not only
isolation from radiated sound but provides the capability to
route ductwork over less sensitive areas.

Acoustically seal the equipment room with a high quality,
flexible material to prevent air and noise from escaping. Even
a small leak compromises the acoustic performance of the
installation. Design the equipment room door to seal tightly on
a perimeter gasket.

Equipment room wall construction should be concrete block or
offset, double stud. The decision depends on the critical nature
of the application. If offset, use double stud construction. Line
the cavity with glass fiber insulation and use a double layer of
wallboard on each side of the wall.

Ductwork

Fan noise travels through the ductwork to occupied spaces; it
likely is the most challenging to control. Careful duct design
and routing practice is required. The ASHRAE Applications
Handbook discusses sound attenuation relevant to self­contained system applications. Advances in acoustical science
allow for designing sound levels in a given space if equipment
sound power data is available. Contact your local McQuay
sales representative for sound power data for your specific
application.

Return Duct

The return duct is often overlooked. Duct return air directly to
the unit or into the equipment room. If ducted to the equipment
room, install an elbow within the equipment room. Running a
return air drop near the floor of the room provides added
attenuation. Extend a length of lined ductwork from the
equipment room to a length of 15 feet. The maximum
recommended return air duct velocity is 1000 feet per minute.

Supply Duct

Extend a lined section of supply air duct at least 15 feet from
the equipment room. Using round duct significantly reduces
low frequency sound near the equipment room. If rectangular
duct is used, keep the aspect ratio of the duct as small as
possible. The large flat surfaces associated with large aspect
ratios transmit sound to the space and increase the potential for
duct generated noise such as oil canning. The maximum
recommended supply air duct velocity is 2000 feet per minute.

Factory-designed and factory-built acoustic discharge plenums
are available with multiple outlets to minimize difficult
transitions, tight radius duct connections, and the sound
compromises they can cause. Multiple factory-fabricated
outlet opening sizes are available as well as multiple openings
in a single plenum.

Duct Protection

An adjustable duct high limit switch is standard equipment on
all SWP systems with VAV controls. This is of particular
importance when using fast-acting, normally closed boxes.
The switch is field adjustable; set it to meet the specific rating
of the system ductwork.

24 McQuay Catalog 860-9

Application Considerations

Two-Way Head Pressure

Control Valve

Vibration Isolation

Make duct connections to the unit or to the acoustic discharge
plenum with a flexible connection. Though flexible piping and
electrical connections are not required, pay attention to these
areas to avoid vibration transmission from outside sources to
the SWP unit.

Condenser Water Piping

Always follow good industry practice in the water piping
system design. Attention to water treatment and proper strainer
application are always necessary. All SWP systems feature
mechanically cleanable condensers and optional waterside
economizer coils. T o allow periodic cleaning of the condensers
and economizer coils, provide isolation valves. Condensers,
economizer coils and hot water coils are provided with vent
and drain connections.

Always review for possible requirements for condenser piping
insulation, especially if cold entering condenser water
conditions (<55°F) will be experienced.

Figure 20: Condensers

Head Pressure Control

If cold entering condenser water conditions (<55°F) will be
experienced, use a waterside economizer or a condenser head
pressure control valve. A two-way, head pressure activated
control valve is available factory installed for these
applications. The head pressure control allows entering
condenser water temperatures as low as 40°F. A head pressure
control valve is not required when the SWP unit is applied
with a factory waterside economizer package.

Figure 21: Head Pressure Control Valves

Variable Air Volume

McQuay SWP units offer variable frequency drives for fan
speed control. VFDs offer reliable operation over a wide range
of airflow, with variable frequency drives offering advantages

McQuay Catalog 860-9 25

in sound and energy performance. In addition, McQuay offers
the ability to sense duct static pressure in multiple locations,
enhancing control accuracy and helping minimize energy use.

Application Considerations

hp2 = hp

1

density

2

density

1

rpm

2

rpm

1

3

Variable Frequency Drives

Variable frequency drives provide the most efficient means of
variable volume control by taking advantage of the fan law
relation between fan speed (rpm) and fan brake horsepower
(bhp). Also, since airflow reduction is accomplished by
changing fan speed, the noise penalties often associated with
mechanical control devices, e.g., inlet vanes, are not
introduced. The following equation illustrates how fan bhp
varies as the cube of the change in fan speed:

In an ideal system, at 50% fan speed, brake horsepower is
reduced to 12.5% of that at full speed.

Variable frequency control varies the speed of the fan by
adjusting the frequency and voltage to the motor. Keeping a
constant volts/frequency ratio (constant magnetic flux) to the
motor allows the motor to run at its peak efficiency over a
wide range of speeds and resulting fan airflow volumes.

Figure 22: Variable Frequency Drive

Duct Static Pressure Sensor Placement

Static pressure should be sensed near the end of the main duct
trunk(s). Adjust the MicroTech III static pressure control so
that at full airflow all of the terminals receive the minimum
static pressure required plus any downstream resistance.
Control is to the lowest static pressure set point that satisfies
airflow requirements. Lower static pressure set points reduce
fan brake horsepower requirements and fan sound generation.

Locate the static pressure sensor tap in the ductwork in an area
free from turbulence effects and at least 10 duct diameters
downstream and several duct diameters upstream from any
major interference, including branch takeoffs. The SWP
MicroTech III control system can receive a second duct static
pressure sensor in installations having multiple duct trunks or
significantly varying zones. The control logic maintains static
pressure at both sensors.

Zone Sensor Placement

Placement of the zone temperature sensor is extremely
important to provide proper and economical operation of the
heating and cooling system. Generally, McQuay recommends
locating the space sensor on an inside wall (3 to 5 feet from an
outside wall) in a space having a floor area of at least 400
square feet. Do not locate the sensor below the outlet of a
supply air diffuser, in the direct rays of the sun, on a wall
adjacent to an unheated or abnormally warm room (boiler or
incinerator room), or near any heat producing equipment.
Where zone sensor placement is a problem, all SWP zone
control systems have, as standard, the capability to use the
return air sensor for heating and cooling control.

Filtration

Routinely replace filters to minimize filter loading. As filters
get dirty, the filter pressure drop increases, affecting system
airflow and energy requirements. The effect of filter loading is
the most critical when using high efficiency filters.

When making a fan selection, include a pressure drop
component in the system total static pressure to account for
dirty filters. Use a value midway between clean and dirty filter
ratings. If a minimum airflow is critical, make the fan selection
using the higher, dirty filter pressure drop value. For VAV
systems, consider setting the fan control device so part of its
modulation range can be used to maintain airflow as filters
become dirty. Following these recommendations should limit
airflow fluctuation as the filters load.

26 McQuay Catalog 860-9

Application Considerations

Fan temperature rise =

(fan heat (MBh))

(1.085 × fan cfm)

52°F + 3°F

leaving
coil
temperature

fan
temperature
rise

= 55°F

discharge
air
temperature

Example:

System Operating Limits

SWP units can be applied in a wide range of system needs.
High cfm/ton or high/low discharge temperature applications
are available. However, for proper system operation, some
application limits do apply.

Airflow

Maximum cfm limits based on coil face velocity are listed in
the Physical Data tables starting on page 31.

Separate minimum design cfm limits by unit size are listed in
the physical data table for constant and variable air volume
applications. Limit fan modulation to 40% of the minimum
design cfm limit. Minimum airflow conditions are dependent
on fan selection criteria also. Contact your McQuay sales
representative to answer questions on minimum airflow
capability or for conditions not shown in this catalog.

VAV box minimum airflow settings should correspond with
the minimum VAV fan operating point. All units are provided
with multigroove, fixed pitch sheaves. During system air
balance, alternate fixed pitch sheaves may be needed to match
final system requirements. Alternate sheaves are available
from McQuay.

Fan Heat

Sensible heat gain from the fan, fan motor, and drives occurs
in all fan systems; consider its effect during equipment
selection. It is an added load in cooling and an added source
when in heating. The majority of the heat gain occurs through
the fan itself, as the air elevates from the low-pressure side to
the high-pressure side of the fan. Moving the motor out of the
air stream has a negligible effect on overall fan heat gain. A
unit with higher fan power requirements/higher fan heat has
less net cooling capability and may not have enough left to
satisfy system loads.

As a rule, typical supply fan heat gain is 3°F. However, fan
heat gain can be calculated quickly once the fan is selected and
the fan brake horsepower is determined. Using Figure 23,
select your fan brake horsepower on the horizontal axis and
move up vertically until you intersect with the heat gain curve.
Then move horizontally to find the fan heat gain in MBh.

Figure 23: Fan and Motor Heat Gain

A draw-through unit has the fan located after the DX cooling
coil. In this arrangement, fan heat is applied as reheat to the
cold, conditioned air coming off of the coil. This arrangement
has a lower sensible heat ratio and higher dehumidification
capability than a blow-through coil arrangement. The
discharge temperature available to the supply duct is always
the sum of the coil leaving air temperature plus the fan
temperature rise. Consider this when selecting the supply air
volume required to satisfy space requirements.

Condenser Water Flow

System capacity tables provide selections for a condenser flow
rate of 3 gpm/ton. For a given entering condenser water
temperature, 3 gpm/ton provides maximum unit performance.
Reducing condenser water flow rates to 2.5 or 2 gpm/ton can
significantly reduce pumping energy costs and reduce piping
costs. Compare and evaluate the reduction in pumping energy
to the change in unit performance. Use the SWP capacity
tables (Table 8, page 36) for condenser flow rates from 2 to 3
gpm/ton, using the appropriate leaving condenser water
temperature column (interpolation is allowed). The minimum
condenser flow rate is 2 gpm/ton.

McQuay Catalog 860-9 27

Application Considerations

Coil Freeze Protection

Always consider coil freeze protection when applying units in
geographic areas that experience subfreezing temperatures.
Careful design of outside air/return air mixing systems is
critical to minimizing freeze potential. Some applications may
require using glycol and/or preheat coils. No control sequence

Air Density Correction

Fan performance data is based on standard 70°F air
temperature and zero feet altitude (sea level). For applications
other than standard, multiply the density ratio to actual static
pressure values. Density correction factors are expressed as a
function of temperature and altitude in Table 2.

can prevent coil freezing in the event of power failure.
A nonaveraging freezestat control is a factory installed

available option with hot water heat or a waterside
economizer. If a potential freeze condition is sensed, unit water
valves are driven to the full open position, the supply fan de­energizes, and an alarm is indicated.

In nonducted return applications, where the equipment room is
the mixing plenum, consider some form of heat within the
equipment room.

Unit Wiring

All units require 3-phase, 60 Hz, 208, 230, 460, or 575 volt
power or 3-phase, 50 Hz, 400-volt power. Units will operate
satisfactorily at ±10% of rated voltage at the power connection
terminals of the unit. All units include individual branch
circuit fusing of all motor loads and have a single-point power
connection. A factory-mounted, nonfused disconnect switch is
an available option. Install all wiring in accordance with the
NEC and local codes.

Terms of Sale

All products are offered pursuant to McQuay’s standard terms
and conditions of sale including limited product warranty,
which can be accessed at www.McQuay.com.

Table 2: Temperature and Altitude Conversion Factors

Air

Temperature

–20ºF 1.20 1.16 1.12 1.08 1.04 1.00 0.97 0.93 0.89

0ºF 1.15 1.10 1.08 1.02 0.99 0.95 0.92 0.88 0.85
20ºF 1.11 1.06 1.02 0.98 0.95 0.92 0.88 0.85 0.82
40ºF 1.06 1.02 0.98 0.94 0.91 0.88 0.84 0.81 0.78
60ºF 1.02 0.98 0.94 0.91 0.88 0.85 0.81 0.79 0.76
70ºF 1.00 0.96 0.93 0.89 0.86 0.83 0.80 0.77 0.74
80ºF 0.98 0.94 0.91 0.88 0.84 0.81 0.78 0.75 0.72

100ºF 0.94 0.91 0.88 0.84 0.81 0.78 0.75 0.72 0.70
120ºF 0.92 0.88 0.85 0.81 0.78 0.76 0.72 0.70 0.67
140ºF 0.89 0.85 0.82 0.79 0.76 0.73 0.70 0.78 0.65

0 1000 2000 3000 4000 5000 6000 7000 8000

Altitude (ft)

28 McQuay Catalog 860-9

Selection Procedure

Achieving the optimal performance of any system requires
both accurate system design and proper equipment selection.
Factors that control unit selection include applicable codes,
ventilation and filtration requirements, heating and cooling
loads, acceptable temperature differentials, and installation
limitations. McQuay SWP units offer a wide selection of
component options providing the capability to meet diverse
application needs.

The McQuay SelectTools ™ software selection program allows
your local McQuay sales representative to provide you with a
fast, accurate, and complete selection of McQuay SWP units.
Unit selection also can be accomplished through reference to
physical, performance, dimensional and unit weight data
included in this catalog. Due to the variety of cooling system
options available, only a sampling of cooling capacity data is
presented here.

To properly select equipment, follow these steps:

1 Select the unit size and compressor combination.
2 Select the heating system.
3 Select the fan and motor.

The following example illustrates the catalog selection
procedure.

Selection Example:

Scheduled design requirements:

Supply air volume . . . . . . . . . . . . . . . . . . . . . . . . . 21,000 cfm

Maximum face velocity . . . . . . . . . . . . . . .550 fpm is chosen*

Supply fan external . . . . . . . . . . . . . . . . . . . . . . . SP 2.00" w.g.

Altitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . sea level

Variable air volume system with fan speed control
Hot water heat
Water economizer system 4" 30% (MERV8) pleated filters
460 V/60 Hz/3 Ph
Double wall construction
R-410A refrigerant Premium efficiency motor
*600 fpm is the design limit per page with tables starting on

page 31

Summer design:

DX coil mixed air dry bulb . . . . . . . . . . . . . . . . . . . . . . . 80°F

DX coil mixed air wet bulb . . . . . . . . . . . . . . . . . . . . . . . 67°F

Sensible load . . . . . . . . . . . . . . . . . . . . . . . . . . 575,000 Btu/hr

Total load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 750,000 Btu/hr

Supply fan sensible heat . . . . . . . . . . . . . . . . . . . . . . . . 3 °F rise

Entering condenser water . . . . . . . . . . . . . . . . . . . . . . . . . 85°F

Leaving condenser water . . . . . . . . . . . . . . . . . . . . . . . . . 95°F

Minimum condenser water . . . . . . . . . . . . . . . . . . . . . . . . 55°F

Winter design:

Return air temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . 60°F

Space heating load . . . . . . . . . . . . . . . . . . . . . . . . . 1,000-MBh

Entering hot water temperature . . . . . . . . . . . . . . . . . . . 180°F

Selection Procedure

Step 1: Unit Size Selection

Unit size is based on coil face area and cooling capacity
requirements. Use supply air capacity and maximum face
velocity constraints as a guide for selecting coil dimensions
and cabinet size.

Based on the given data, the appropriate coil face area is
determined as follows:

Minimum face area = cfm/maximum face ve locity
= 21,000 cfm/550 fpm
= 38.2 square feet

Note: Unit data is based on standard air conditions of 70°F at

sea level. See “Application Considerations” on page 23
for temperature/altitude conversion factors for
nonstandard conditions.

Referring to the “Physical Data” tables starting on page 31, the

40.8 square foot coil of the SWP 062HSM satisfies the
requirements.

Step 2: Unit DX Cooling Selection

Since the design cfm is less than the nominal value in the DX
Cooling Capacity Data table, adjust the capacities per tables on
starting on page 36.

cfm correction factor = design cfm/nominal cfm
= 21,000 / 21,500 = 97.7%

Total heat correction multiplier = 0.995
Sensible heat correction multiplier = 0.987
Using the “Performance Data” starting on page 36, the unit

selection is a SWP 062 HS with (2) 13 hp and (2) 15 hp
compressors. Unit performance from the table equals 806.0
TMBh / 587.0 SMBh at 190 gpm. Adjusting for the specified
cfm yields:

Total capacity = 806.0 MBh ×0.995 = 800.9 MBh
Sensible capacity = 587.0 MBh × 0.987 = 579.2 MBh
Coil LAT = 80ºF – 579.0 MBh/(1.085 × 21,000

1,000

Condenser flow rate = 196 gpm × 0.995 = 195 gpm

Step 3: Economizer Capacity Selection

Determine waterside economizer capacity by referring to the
appropriate table. See “Waterside Economizer Capacity” on

page 44 for 40.8 sq.ft. coil. Use entering air of 80/67°F and

entering water of 55°F at 185 gpm. Interpolating for the
required gpm, economizer performance equals 497.8 TMBh /

473.0 SMBh at the unit’s nominal cfm. See tables starting on

page 45, “Waterside Economizer Capacity Correction

Factors,” to find performance at the specified cfm.

Total capacity = 415.2 MBh × 1.12 = 465.0 MBh
Sensible capacity = 363.8 MBh × 1.19 = 432.9 MBh

cfm) = 54.7°F

McQuay Catalog 860-9 29

Selection Procedure

Step 4: Heating Selection

Determine hot water capacity from the tables starting on

page 45. After interpolating for the specified cfm, Table 16

indicates a capacity of 1,002.0 MBh.

Step 5: Fan/Motor Selection

Fan/motor selection is based on unit total static pressure and
design airflow. Total static pressure includes the internal air
pressure drops of unit components and external air pressure
drops of supply and return air duct systems. See “Component
Pressure Drops” starting on page 46 for internal pressure drops
of unit components. Values in the table may be interpolated for
the specified cfm.

Internal pressure drops:

DX coil (wet surface) . . . . . . . . . . . . . . . . . . . . . .0.80" w.g.

Economizer coil (dry surface) . . . . . . . . . . . . . . .0.49" w.g.

Hot water coil . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.52" w.g.

4", 30% efficient filters . . . . . . . . . . . . . . . . . . . . .0.29" w.g.

Total internal pressure drop . . . . . . . . . . . . . . . . . .2.1" w.g.

External pressure drop:

Supply + return duct . . . . . . . . . . . . . . . . . . . . . . .2.00" w.g.

Total static pressure = internal drops + external drops

= 2.1" + 2.00"
= 4.10" w.g.

Entering the fan curve for the SWP 062 HSM at 21,000 cfm
and 4.10" w.g. yields 18.35 required fan brake horsepower. A
20 horsepower motor can be selected with a 33" diameter fan.

Step 6: Calculating Unit Weight

Referring to the tables starting on page 66.
For an SWP 062 HS:

Unit weight: SWP basic unit . . . . . . . . . . . . . . . . . . . . . . .6179

+ 30% filters . . . . . . . . . . . . . . . . . . . . . . . . .22

+ 6-row evaporator coil . . . . . . . . . . . . . . . .668

+ economizer coil . . . . . . . . . . . . . . . . . . . .557

+ water (econ. coil). . . . . . . . . . . . . . . . . . . .250

+ hot water coil . . . . . . . . . . . . . . . . . . . . . .200

+ water (HW coil). . . . . . . . . . . . . . . . . . . . . .49

+ SAF motor. . . . . . . . . . . . . . . . . . . . . . . . .235

+ VFD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

+ SAF assembly . . . . . . . . . . . . . . . . . . . . . .592

= 8,752 lbs.

Step 7: Supply Power Wiring

Supply power wire sizing for a unit is based on the circuit with
the highest amperage draw . All electrical equipment is wired to
a central control panel for either single or optional dual power
connections. Refer to “Electrical Data” on page 65 for FLA
and RLA ratings. Determine Minimum Circuit Ampacity
(MCA) as follows:

MCA = [1.25 × RLA or FLA of largest motor] + [1.00 ×
RLA or FLA of all other loads] + [2 amps (controls)]

RLA/FLA

(2) 13 horsepower compressors . . . . . . . . . . . . 18.3 amps each

(2) 15 horsepower compressors . . . . . . . . . . . . 18.5 amps each

25 horsepower premium efficiency

supply fan motor . . . . . . . . . . . . . . . . . . . . . . . . . 24.5 amps

MCA = [1.25×24.5 amps] + [18.3+18.3+18.5+18.5] + [2]
= 106.2 amps

Note: If a unit is selected with non-concurrent electric heat,

calculate the MCA for both the heating mode and the
cooling mode and the larger value used.

30 McQuay Catalog 860-9

Physical Data

Physical Data

Table 3: SWP 012 through SWP 033 Physical Data

Data

023 028 033

Compressor

Quantity 2
Size (HP) 6, 15 6, 15 10, 15 10, 15 15 (2) 15 (2)
Number of refrigeration circuits 2

Evaporator coil

Coil size Standard Large Standard Large Standard Large
Face area (ft

2

)

17.2 25.2 17.2 25.2 17.2 25.2
Number of rows 5
FPI 12

Performance

Total capacity
Unit EER

2

1

(MBH)

312 334 357 386 411 448

14.3 14.7 13.8 14.4 13.3 14.0

Pre-heating coil

Minimum hot water coil face area (ft

2

)
Available rows 1 through 12
Minimum steam coil face area (ft

2

)
Available rows 1 through 4
FPI 6 through 14

Waterside economizer coil

Face area (ft

2

)

17.2 25.2 17.2 25.2 17.2 25.2
Rows 4
FPI 12
Maximum working pressure (PSIG) 300 standard, 450 optional

Face loaded filters

(Quantity) Size (9) 24
2" filter options 30% (MERV7), 75% (MERV13)
4" filter options 30% (MERV8), 75% (MERV11), 85% (MERV14)
Pre-filter options 2"-30% with 4"-65%, 2"-30% with 4"-75%, 2"-30% with 4"-85%

Evaporator fan

3

Quantity 1
Available diameter (Inches) 12, 15, 18, 20, 22, 24
Maximum motor size (HP) 20
CAV minimum design (CFM)
VAV minimum design (CFM)
Maximum design (CFM)

4

4

4

3440 5040 3440 5040 3440 5040
6880 10080 6880 10080 6880 10080

10320 15120 10320 15120 10320 15120

Electric heat

Nominal output (kW) 34
Control sequence 2-stage

Condenser

Maximum working pressure (PSIG) 300 standard, 450 optional
Mechanical cooling minimum EWT (ºF) 55
Minimum flow rate (GPM) 52 56 59 64 69 75
Maximum flow rate (GPM) 78 84 89 96 103 112

Note: 1. Based on AHRI 340/360 standard rating conditions, 80/67ºF to the coil, 85/95ºF condenser water.

2. Based on AHRI 340/360 standard rating conditions.

3. Standard fan TSP limit is 6.0 inches of water. Consult your local McQuay sales representative for applications beyond this range.

4. Minimum design airflow calculated for CAV at 200 fpm, VAV at 400 fpm and a maximum design airflow calculated at 600fpm.

Small Cabinet

19.8

19.8

×

24

McQuay Catalog 860-9 31

Physical Data

Table 4: SWP 039 through SWP 050 Physical Data

Data

039 044 050

Compressor

Quantity 3
Size (HP) 10(2), 15 10(2), 15 10, 15(2) 10(2), 15 15(3)
Number of refrigeration circuits 3

Evaporator coil

Coil size Standard Large Standard Large Large
Face area (ft

2

)

25.2 29.8 25.2 29.8 29.8
Number of rows 5
FPI 12

Performance

Total capacity
Unit EER

2

1

(MBH)

516 535 589 645 645

14.4 14.6 14.2 14.4 13.6

Pre-heating coil

Minimum hot water coil face area (ft

2

)
Available rows 1 through 12
Minimum steam coil face area (ft

2

)
Available rows 1 through 4
FPI 6 through 14

Waterside economizer coil

Face area (ft

2

)

25.2 29.8 25.2 29.8 29.8
Rows 4
FPI 12
Maximum working pressure (PSIG) 300 standard, 450 optional

Face loaded filters

(Quantity) Size (9) 24
2" filter options 30% (MERV7), 75% (MERV13)
4" filter options 30% (MERV8), 75% (MERV11), 85% (MERV14)
Pre-filter options 2"-30% with 4"-65%, 2"-30% with 4"-75%, 2"-30% with 4"-85%

Evaporator fan

3

Quantity 1
Available diameter (Inches) 18, 20, 22, 24, 27
Maximum motor size (HP) 20
CAV minimum design (CFM)
VAV minimum design (CFM)
Maximum design (CFM)

4

4

4

5040 5960 5040 5960 5960
10080 11920 10080 11920 11920
15120 17880 15120 17880 17880

Electric heat

Nominal output (kW) 34
Control sequence 2-stage

Condenser

Maximum working pressure (PSIG) 300 standard, 450 optional
Mechanical cooling minimum EWT (ºF) 55
Minimum flow rate (GPM) 86 89 98 107 107
Maximum flow rate (GPM) 129 134 147 161 161

Note: 1. Based on AHRI 340/360 standard rating conditions, 80/67ºF to the coil, 85/95ºF condenser water.

2. Based on AHRI 340/360 standard rating conditions.

3. Standard fan TSP limit is 6.0 inches of water. Consult your local McQuay sales representative for

XXapplications beyond this range.

4. Minimum design airflow calculated for CAV at 200 fpm, VAV at 400 fpm and a maximum design airflow XXcalculated at 600fpm.

Small Tall Cabinet

19.8

19.8

×

24

32 McQuay Catalog 860-9

Physical Data

Table 5: SWP 044 through SWP 055 Physical Data

Data

044 050 056 062 065

Compressor

Quantity 3 4
Size (HP) 10(2), 15 (3)15 (4)13 13(2), 15(2) 15(4)
Number of refrigeration circuits 3 4

Evaporator coil

Coil size Standard Standard Large Standard Large Standard Large Standard Large
Face area (ft

2

)

40.8 40.8 45.8 40.8 45.8 40.8 45.8 40.8 45.8
Number of rows 5
FPI 12

Performance

Total capacity
Unit EER

2

1

(MBH)

624 690 705 774 792 816 834 865 884

14.5 14.2 14.3 14.8 14.9 14.2 14.3 13.8 14.0

Pre-heating coil

Minimum hot water coil face area (ft

2

)
Available rows 1 through 12
Minimum steam coil face area (ft

2

)
Available rows 1 through 4
FPI 6 through 14

Waterside economizer coil

Face area (ft

2

)

40.8 40.8 45.8 40.8 45.8 40.8 45.8 40.8 45.8
Rows 4
FPI 12
Maximum working pressure (PSIG) 300 standard, 450 optional

Face loaded filters

(Quantity) Size (4) 12
2" filter options 30% (MERV7), 75% (MERV13)
4" filter options 30% (MERV8), 75% (MERV11), 85% (MERV14)
Pre-filter options 2"-30% with 4"-65%, 2"-30% with 4"-75%, 2"-30% with 4"-85%

Evaporator fan

3

Quantity 1
Available diameter (Inches) 18, 20, 22, 24, 27, 30, 33, 37
Maximum motor size (HP) 40
CAV minimum design (CFM)
VAV minimum design (CFM)
Maximum design (CFM)

4

4

4

8160 8160 9160 8160 9160 8160 9160 8160 9160
16320 16320 18320 16320 18320 16320 18320 16320 18320
24480 24480 27480 24480 27480 24480 27480 24480 27480

Electric heat

Nominal output (kW)
Control sequence 2-stage

Condenser

Maximum working pressure (PSIG) 300 standard, 450 optional
Mechanical cooling minimum EWT (ºF) 55
Minimum flow rate (GPM) 104 115 118 129 132 136 139 144 147
Maximum flow rate (GPM) 156 173 176 194 198 204 209 216 221

Note: 1. Based on AHRI 340/360 standard rating conditions, 80/67ºF to the coil, 85/95ºF condenser water.

2. Based on AHRI 340/360 standard rating conditions.

3. Standard fan TSP limit is 6.0 inches of water. Consult your local McQuay sales representative for applications beyond this range.

4. Minimum design airflow calculated for CAV at 200 fpm, VAV at 400 fpm and a maximum design airflow calculated at 600fpm.

5. Available for 460 volt and 575 volt units only

Medium Cabinet

32.25

32.25

×

24 and (12) 24×24

5

34, 68

McQuay Catalog 860-9 33

Physical Data

Table 6: SWP 062 through SWP 088 Physical Data

Data

062 073 080 088

Compressor

Quantity 4 6
Size (HP) 13(2), 15(2) 10(4), 13(2) 10(2), 13(4) 13(6)
Number of refrigeration circuits 4 6

Evaporator coil

Coil size Standard
Face area (ft

2

)
Number of rows 5 6
FPI 12

Performance

Total capacity
Unit EER

2

1

(MBH)

866 1021 1093 1164

14.6 14.1 14.6 14.4

Pre-heating coil

Minimum hot water coil face area (ft

2

)
Available rows 1 through 12
Minimum steam coil face area (ft

2

)
Available rows 1 through 4
FPI 6 through 14

Waterside economizer coil

Face area (ft

2

)
Rows 4
FPI 12
Maximum working pressure (PSIG) 300 standard, 450 optional

Face loaded filters

(Quantity) Size ( 5) 12
2" filter options 30% (MERV7), 75% (MERV13)
4" filter options 30% (MERV8), 75% (MERV11), 85% (MERV14)
Pre-filter options 2"-30% with 4"-65%, 2"-30% with 4"-75%, 2"-30% with 4"-85%

Evaporator fan

3

Quantity 1
Available diameter (Inches) 22, 24, 27, 30, 33, 37
Maximum motor size (HP) 50
CAV minimum design (CFM)
VAV minimum design (CFM)
Maximum design (CFM)

4

4

4

Electric heat

Nominal output (kW) 68
Control sequence 2-stage

Condenser

Maximum working pressure (PSIG) 300 standard, 450 optional
Mechanical cooling minimum EWT (ºF) 55
Minimum flow rate (GPM) 144 170 182 194
Maximum flow rate (GPM) 217 255 573 291

Note: 1. Based on AHRI 340/360 standard rating conditions, 80/67ºF to the coil, 85/95ºF condenser water.

2. Based on AHRI 340/360 standard rating conditions.

3. Standard fan TSP limit is 6.0 inches of water. Consult your local McQuay sales representative for XXapplications beyond this range.

4. Minimum design airflow calculated for CAV at 200 fpm, VAV at 400 fpm and a maximum design airflow XXcalculated at 600fpm.

Large Cabinet

52.5

36, 67

36, 67

52.5

×

24 and (15) 24×24

10500
21000
31500

34 McQuay Catalog 860-9

Physical Data

Table 7: SWP 065 through SWP 130 Physical Data

Data

065 073 080 088 099 105 120 130

Compressor

Quantity 4 6 8
Size (HP) 15(4)

10(4),

13(2)

10(2),

13(4)

13(6) 15(6) 13(8) 13(4), 15(4) 15(8)

Number of refrigeration circuits 4 6 8

Evaporator coil

Coil size Std StdLgStdLgStdLgStdLg
Face area (ft

2

)

60.9 60.9 71.3 60.9 71.3 60.9 71.3 60.9 71.3
Number of rows 6
FPI 12

Performance

Total capacity
Unit EER

2

1

(MBH)

946 1052 1128 1202 1343 1381 1451 1527 1526 1606 1621 1701

14.5 15.1 14.9 14.7 13.7 14.0 13.6 14.3 13.2 13.7 12.8 13.3

Pre-heating coil

Minimum hot water coil face area (ft

2

)
Available rows 1 through 12
Minimum steam coil face area (ft

2

)
Available rows 1 through 4
FPI 6 through 14

Waterside economizer coil

Face area (ft

2

)

60.9 60.9 71.3 60.9 71.3 60.9 71.3 60.9 71.3
Rows 4
FPI 12
Maximum working pressure (PSIG) 300 standard, 450 optional

Face loaded filters

(Quantity) Size (20) 24
2" filter options 30% (MERV7), 75% (MERV13)
4" filter options 30% (MERV8), 75% (MERV11), 85% (MERV14)
Pre-filter options 2"-30% with 4"-65%, 2"-30% with 4"-75%, 2"-30% with 4"-85%

Evaporator fan

3

Quantity 1
Available diameter (Inches) 24, 27, 30, 33, 37, 40, 44
Maximum motor size (HP) 50
CAV minimum design (CFM)
VAV minimum design (CFM)
Maximum design (CFM)

4

4

4

12180 12180 14260 12180 14260 12180 14260 12180 14260
24360 24360 28520 24360 28520 24360 28520 24360 28520
36540 36540 42780 36540 42780 36540 42780 36540 42780

Electric heat

Nominal output (kW) 68
Control sequence 2-stage

Condenser

Maximum working pressure (PSIG) 300 standard, 450 optional
Mechanical cooling minimum EWT (ºF) 55
Minimum flow rate (GPM) 158 175 188 200 224 230 242 254 254 268 270 284
Maximum flow rate (GPM) 237 263 282 300 336 345 363 382 382 402 405 425

Note: 1. Based on AHRI 340/360 standard rating conditions, 80/67ºF to the coil, 85/95ºF condenser water.

2. Based on AHRI 340/360 standard rating conditions.

3. Standard fan TSP limit is 6.0 inches of water. Consult your local McQuay sales representative for applications beyond this range.

4. Minimum design airflow calculated for CAV at 200 fpm, VAV at 400 fpm and a maximum design airflow calculated at 600fpm.

Large Tall Cabinet

45.83

45.83

×

24

McQuay Catalog 860-9 35

Performance Data

Performance Data

DX Cooling Capacity Data

Table 8: SWP 012–SWP033 (Small Cabinet) Cooling Capacity

EAT

Unit

SWP 023HS DB/WB (ºF) EWB (ºF) TMBH SMBH LDB LWB GPM

6 hp & 13 hp Compressors

5-row Standard DX Coil

8,000 cfm

410 A

SWP 023HL DB/WB (ºF) EWB (ºF) TMBH SMBH LDB LWB GPM

6 hp & 13 hp Compressors

5-row Large DX Coil

8,300 cfm

410 A

SWP 028HS DB/WB (ºF) EWB (ºF) TMBH SMBH LDB LWB GPM

10 hp& 15 hp Compressors

5-row Standard DX Coil

59,500 cfm

410 A

SWP 028HL DB/WB (ºF) EWB (ºF) TMBH SMBH LDB LWB GPM

10 hp & 15 hp Compressors

5-row Large DX Coil

9,800 cfm

410 A

SWP 033HS DB/WB (ºF) EWB (ºF) TMBH SMBH LDB LWB GPM

2 × 15 hp Compressors
5-row Standard DX Coil

10,500 cfm

410 A

SWP 033HL DB/WB (ºF) EWB (ºF) TMBH SMBH LDB LWB GPM

2 × 15 hp Compressors

5-row Large DX Coil

11,500 cfm

410 A

Note: See Table 14, page 45 to determine unit capacity at other than nominal cfm.

For a computer-generated, job-specific selection, contact your local McQuay sales representative. For 50 Hz applications, derate the total capacity by

0.89; derate the sensible capacity by 0.94. All capacities are gross and do not account for fan motor heat.
Altitude and/or glycol selections are also available.

DB/WB Total Sensible DB WB

(ºF) (ºF) (MBH) (MBH) (ºF) (ºF) (GPM)

75.0/62.0

80.0/67.0

85.0/72.0

75.0/62.0

80.0/67.0

85.0/72.0

75.0/62.0

80.0/67.0

85.0/72.0

75.0/62.0

80.0/67.0

85.0/72.0

75.0/62.0

80.0/67.0

85.0/72.0

75.0/62.0

80.0/67.0

85.0/72.0

EWT

75 291 228 48.9 48.9 87
85 279 223 49.5 49.5 85
95 266 217 50.2 50.1 84
75 318 226 54.2 54.1 94
85 305 221 54.8 54.7 92
95 291 215 55.4 55.4 90
75 346 223 59.5 59.5 102
85 332 218 60.1 60.1 100
95 316 212 60.8 60.7 97

75 298 236 49.1 49.1 71
85 285 230 49.7 49.7 70
95 272 224 50.4 50.3 68
75 325 233 54.3 54.3 77
85 311 227 55.0 54.9 75
95 296 221 55.6 55.6 74
75 353 230 59.7 59.7 83
85 338 224 60.3 60.3 81
95 321 218 61.0 60.9 79

75 338 267 49.3 49.2 81
85 325 261 49.9 49.7 80
95 309 254 50.5 50.4 79
75 369 264 54.5 54.4 88
85 354 258 55.1 55.0 86
95 337 252 55.8 55.6 85
75 401 261 59.9 59.8 95
85 385 255 60.5 60.3 93
95 367 249 61.1 60.9 91

75 350 277 49.2 49.1 84
85 335 270 49.8 49.7 82
95 320 263 50.4 50.3 81
75 381 274 54.4 54.4 90
85 365 268 55.0 55.0 89
95 348 261 55.7 55.6 87
75 414 270 59.8 59.8 97
85 396 264 60.3 60.3 95
95 378 257 61.0 60.9 94

75 394 304 48.6 48.4 95
85 379 297 49.2 49.0 94
95 361 289 49.9 49.7 92
75 431 301 53.7 53.6 103
85 413 294 54.4 54.2 103
95 394 286 55.1 54.9 100
75 468 296 59.1 59.0 112
85 449 290 59.7 59.6 109
95 429 282 60.4 60.3 107

75 414 326 49.1 49.0 100
85 397 318 49.7 49.6 98
95 379 310 50.3 50.3 96
75 452 323 54.4 54.3 108
85 433 315 54.9 54.9 106
95 413 307 55.6 55.5 104
75 491 318 59.7 59.7 116
85 470 310 60.3 60.2 114
95 448 302 60.9 60.9 111

Capacity LAT

Flow Rate

36 McQuay Catalog 860-9

Performance Data

Table 9: SWP 039–SWP050 (Small Tall Cabinet) Cooling Capacity

EAT

Unit

SWP 039HS DB/WB (ºF) EWB (ºF) TMBH SMBH LDB LWB GPM

(2) 10 hp, 15 hp Compressors

5-row Standard DX Coil

13,500 cfm

410 A

SWP 039HL DB/WB (ºF) EWB (ºF) TMBH SMBH LDB LWB GPM

(2) 10 hp, 15 hp Compressors

5-row Large DX Coil

14,000 cfm

410 A

SWP 044HS DB/WB (ºF) EWB (ºF) TMBH SMBH LDB LWB GPM

10 hp, (2) 15 hp Compressors

5-row Standard DX Coil

15,000 cfm

410 A

SWP 044HL DB/WB (ºF) EWB (ºF) TMBH SMBH LDB LWB GPM

10 hp, (2) 15 hp Compressors

5-row Large DX Coil

15,500 cfm

410 A

SWP 050HL DB/WB (ºF) EWB (ºF) TMBH SMBH LDB LWB GPM

(32) 15 hp Compressors

5-row Large DX Coil

17,000 cfm

410 A

Note: See Table 14, page 45 to determine unit capacity at other than nominal cfm.

For a computer-generated, job-specific selection, contact your local McQuay sales representative. For 50 Hz applications, derate the total capacity by

0.89; derate the sensible capacity by 0.94. All capacities are gross and do not account for fan motor heat.
Altitude and/or glycol selections are also available.

DB/WB Total Sensible DB WB

(ºF) (ºF) (MBH) (MBH) (ºF) (ºF) (GPM)

75.0/62.0

80.0/67.0

85.0/72.0

75.0/62.0

80.0/67.0

85.0/72.0

75.0/62.0

80.0/67.0

85.0/72.0

75.0/62.0

80.0/67.0

85.0/72.0

75.0/62.0

80.0/67.0

85.0/72.0

EWT

75 491 383 49.0 48.8 118
85 471 374 49.6 49.4 116
95 449 365 50.3 50.1 114
75 531 379 54.3 54.2 126
85 510 370 54.9 54.8 124
95 486 360 55.6 55.4 122
75 576 373 59.7 59.6 136
85 552 364 60.3 60.2 133
95 526 355 60.9 60.8 130

75 502 395 49.2 49.1 120
85 481 386 49.8 49.6 118
95 459 376 50.5 50.3 116
75 542 390 54.5 54.5 129
85 520 381 55.1 55.0 126
95 496 371 55.8 55.6 124
75 586 383 60.0 59.9 138
85 563 375 60.5 60.4 135
95 536 365 61.1 61.0 133

75 548 426 49.0 48.7 132
85 527 416 49.6 49.3 130
95 503 405 50.3 50.0 128
75 594 422 54.3 54.1 142
85 571 412 54.9 54.7 139
95 545 401 55.5 55.3 137
75 643 415 59.7 59.5 152
85 617 406 60.3 60.1 150
95 589 395 60.9 60.7 146

75 561 439 49.1 48.9 135
85 539 429 49.7 49.5 133
95 514 418 50.4 50.1 130
75 607 434 54.4 54.3 145
85 583 424 55.0 54.8 142
95 557 413 55.6 55.4 139
75 657 427 59.8 59.9 155
85 630 417 60.4 60.3 152
95 601 406 61.0 60.9 149

75 623 483 49.0 48.7 150
85 598 472 49.6 49.3 148
95 571 459 50.3 49.9 145
75 675 478 54.3 54.1 161
85 648 466 54.9 54.7 158
95 618 454 55.6 55.3 155
75 729 470 59.7 59.6 173
85 699 459 60.3 60.1 170
95 667 447 60.9 60.7 166

Capacity LAT

Flow Rate

McQuay Catalog 860-9 37

Performance Data

Table 10: SWP 044–SWP065 (Medium Cabinet) Cooling Capacity

EAT

Unit

SWP 044HS DB/WB (ºF) EWB (ºF) TMBH SMBH LDB LWB GPM

(2) 10 hp, 15 hp Compressors

5-row Standard DX Coil

16,000 cfm

410 A

SWP 050HS DB/WB (ºF) EWB (ºF) TMBH SMBH LDB LWB GPM

(3) 15 hp Compressors
5-row Standard DX Coil

17,500 cfm

410 A

SWP 050HL DB/WB (ºF) EWB (ºF) TMBH SMBH LDB LWB GPM

(3) 15 hp Compressors

5-row Large DX Coil

18,000 cfm

410 A

SWP 056HS DB/WB (ºF) EWB (ºF) TMBH SMBH LDB LWB GPM

(4) 13 hp Compressors
5-row Standard DX Coil

20,500 cfm

410 A

SWP 056HL DB/WB (ºF) EWB (ºF) TMBH SMBH LDB LWB GPM

(4) 13 hp Compressors

5-row Large DX Coil

20,500 cfm

410 A

Note: See Table 14, page 45 to determine unit capacity at other than nominal cfm.

For a computer-generated, job-specific selection, contact your local McQuay sales representative. For 50 Hz applications, derate the total capacity by

0.89; derate the sensible capacity by 0.94. All capacities are gross and do not account for fan motor heat.
Altitude and/or glycol selections are also available.

DB/WB Total Sensible DB WB

(ºF) (ºF) (MBH) (MBH) (ºF) (ºF) (GPM)

75.0/62.0

80.0/67.0

85.0/72.0

75.0/62.0

80.0/67.0

85.0/72.0

75.0/62.0

80.0/67.0

85.0/72.0

75.0/62.0

80.0/67.0

85.0/72.0

75.0/62.0

80.0/67.0

85.0/72.0

EWT

75 583 457 48.9 48.8 139
85 559 446 49.5 49.4 137
95 532 434 50.2 50.1 134
75 630 450 54.3 54.2 150
85 605 440 54.9 54.8 147
95 576 428 55.5 55.4 144
75 680 442 59.7 59.7 160
85 652 432 60.3 60.2 157
95 621 421 60.9 60.9 154

75 592 479 50.0 49.9 140
85 568 468 50.5 50.4 138
95 541 456 51.2 51.0 136
75 639 475 55.3 55.3 150
85 613 462 55.9 55.8 148
95 584 450 56.5 56.4 145
75 691 464 60.7 60.7 161
85 663 455 61.2 61.2 158
95 631 444 61.8 61.8 155

75 656 513 48.9 48.8 157
85 629 501 49.6 49.4 154
95 599 487 50.2 50.1 151
75 710 506 54.3 54.4 169
85 681 494 54.9 54.8 166
95 648 481 55.6 55.4 162
75 766 497 59.7 59.7 181
85 734 486 60.3 60.2 177
95 699 473 61.0 60.9 173

75 729 576 49.3 49.2 174
85 699 563 49.9 49.8 171
95 667 548 50.5 50.4 168
75 794 571 54.5 54.5 188
85 759 556 55.2 55.1 184
95 723 542 55.8 55.7 180
75 864 563 59.9 59.8 203
85 825 549 60.5 60.4 198
95 784 534 61.2 61.1 193

75 736 580 49.1 49.0 175
85 705 566 49.8 49.6 172
95 673 552 60.4 50.3 169
75 801 574 54.4 54.3 189
85 766 560 55.0 55.0 185
95 729 545 55.7 55.6 181
75 872 566 59.8 59.7 204
85 832 552 60.4 60.3 199
95 790 537 61.0 61.0 194

Capacity LAT

Flow Rate

38 McQuay Catalog 860-9

Performance Data

Table 10: SWP 044–SWP065 (Medium Cabinet) Cooling Capacity

SWP 062HS DB/WB (ºF) EWB (ºF) TMBH SMBH LDB LWB GPM

75 773 608 49.1 49.0 186

75.0/62.0

(2) 13 hp, (2) 15 hp Compressors

5-row Standard DX Coil

21,500 cfm

410 A

SWP 062HL DB/WB (ºF) EWB (ºF) TMBH SMBH LDB LWB GPM

(2) 13 hp, (2) 15 hp Compressors

5-row Large DX Coil

21,500 cfm

410 A

SWP 065HS DB/WB (ºF) EWB (ºF) TMBH SMBH LDB LWB GPM

(4) 15 hp Compressors
5-row Standard DX Coil

22,750 cfm

410 A

SWP 065HL DB/WB (ºF) EWB (ºF) TMBH SMBH LDB LWB GPM

(4) 15 hp Compressors

5-row Large DX Coil

23,000 cfm

410 A

Note: See Table 14, page 45 to determine unit capacity at other than nominal cfm.

For a computer-generated, job-specific selection, contact your local McQuay sales representative. For 50 Hz applications, derate the total capacity by

0.89; derate the sensible capacity by 0.94. All capacities are gross and do not account for fan motor heat.
Altitude and/or glycol selections are also available.

80.0/67.0

85.0/72.0

75.0/62.0

80.0/67.0

85.0/72.0

75.0/62.0

80.0/67.0

85.0/72.0

75.0/62.0

80.0/67.0

85.0/72.0

85 741 594 49.7 49.6 182
95 707 579 50.4 50.2 179
75 842 602 54.4 54.3 200
85 806 587 55.0 54.9 196
95 768 572 55.7 55.5 192
75 915 593 59.8 59.7 216
85 875 579 60.4 60.3 211
95 833 564 61.0 60.9 206

75 783 619 49.3 49.2 188
85 751 605 49.9 49.8 184
95 717 589 50.5 50.4 181
75 852 612 54.5 54.5 202
85 816 598 55.2 55.1 198
95 777 582 55.8 55.7 194
75 926 604 59.9 59.8 219
85 885 589 60.5 60.4 213
95 842 574 61.2 61.1 208

75 825 646 49.0 48.9 199
85 792 631 49.6 49.5 195
95 756 615 50.3 50.1 192
75 896 638 54.3 54.2 214
85 859 624 54.9 54.8 210
95 819 607 55.6 55.4 206
75 972 629 59.7 59.6 231
85 931 614 60.3 60.2 221
95 887 598 61.0 60.8 221

75 835 654 49.0 48.9 201
85 801 639 49.6 49.5 197
95 765 622 50.3 50.1 194
75 906 646 54.3 54.2 216
85 869 631 54.9 54.8 212
95 828 615 55.6 55.4 208
75 982 636 59.7 59.6 233
85 941 621 60.3 60.2 228
95 896 605 60.9 60.8 223

McQuay Catalog 860-9 39

Performance Data

Table 11: SWP 062–SWP088 (Large Cabinet) Cooling Capacity

EAT

Unit

SWP 062HS DB/WB (ºF) EWB (ºF) TMBH SMBH LDB LWB GPM

(2) 13 hp, (2)15 hp Compressors

5-row Standard DX Coil

22,000 cfm

410 A

SWP 073HS DB/WB (ºF) EWB (ºF) TMBH SMBH LDB LWB GPM

(4) 13 hp, (2) 15 hp Compressors

6-row Standard DX Coil

27,000 cfm

410 A

SWP 080HS DB/WB (ºF) EWB (ºF) TMBH SMBH LDB LWB GPM

(2) 13 hp, (4) 15 hp Compressors

6-row Standard DX Coil

29,000 cfm

410 A

SWP 088HS DB/WB (ºF) EWB (ºF) TMBH SMBH LDB LWB GPM

6 hp & 13 hp Compressors

6-row Standard DX Coil

31,000 cfm

410 A

Note: See Table 14, page 45 to determine unit capacity at other than nominal cfm.

For a computer-generated, job-specific selection, contact your local McQuay sales representative. For 50 Hz applications, derate the total capacity by

0.89; derate the sensible capacity by 0.94. All capacities are gross and do not account for fan motor heat.
Altitude and/or glycol selections are also available.

DB/WB Total Sensible DB WB

(ºF) (ºF) (MBH) (MBH) (ºF) (ºF) (GPM)

75.0/62.0

80.0/67.0

85.0/72.0

75.0/62.0

80.0/67.0

85.0/72.0

75.0/62.0

80.0/67.0

85.0/72.0

75.0/62.0

80.0/67.0

85.0/72.0

EWT

75 799 627 48.9 48.9 191
85 765 612 49.6 49.5 187
95 729 596 50.2 50.1 184
75 868 620 54.2 54.2 206
85 830 604 54.9 54.8 202
95 790 588 55.5 55.5 197
75 943 610 59.6 59.6 222
85 900 595 60.3 60.2 217
95 855 579 60.9 60.9 211

75 969 765 49.1 49.0 230
85 928 747 49.7 49.6 226
95 884 727 50.4 50.3 221
75 1048 754 54.5 54.4 247
85 1004 737 55.0 55.0 242
95 957 718 55.7 55.6 237
75 1133 742 59.9 59.9 265
85 1085 724 60.5 60.4 259
95 1032 706 61.1 61.1 253

75 1046 823 49.0 48.9 248
85 1001 803 49.7 49.6 244
95 953 782 50.3 50.2 239
75 1134 813 54.4 54.3 267
85 1085 793 55.0 54.9 262
95 1033 772 55.6 55.5 256
75 1227 800 59.8 59.7 287
85 1173 780 60.4 60.3 281
95 1116 760 61.0 61.0 274

75 1122 881 49.0 48.9 267
85 1074 860 49.6 49.5 262
95 1024 837 50.3 50.1 257
75 1218 871 54.3 54.2 287
85 1165 850 54.9 54.8 281
95 1110 827 55.6 55.5 275
75 1320 858 59.7 59.6 309
85 1261 836 60.3 60.3 302
95 1200 814 61.0 60.9 295

Capacity LAT

Flow Rate

40 McQuay Catalog 860-9

Performance Data

Table 12: SWP 065–SWP130 (Large Tall Cabinet) Cooling Capacity

EAT

Unit

SWP 065HS DB/WB (ºF) EWB (ºF) TMBH SMBH LDB LWB GPM

(4) 15 hp Compressors
6-row Standard DX Coil

24,000 cfm

410 A

SWP 073HS DB/WB (ºF) EWB (ºF) TMBH SMBH LDB LWB GPM

(4) 10 hp, (2) 13 hp Compressors

6-row Standard DX Coil

27,500 cfm

410 A

SWP 080HL DB/WB (ºF) EWB (ºF) TMBH SMBH LDB LWB GPM

(2) 10 hp, (4) 13 hp Compressors

6-row Standard DX Coil

29,500 cfm

410 A

SWP 088HS DB/WB (ºF) EWB (ºF) TMBH SMBH LDB LWB GPM

(6) 13 hp Compressors
6-row Standard DX Coil

31,500 cfm

410 A

SWP 099HS DB/WB (ºF) EWB (ºF) TMBH SMBH LDB LWB GPM

(6) 15 hp Compressors

6-row Large DX Coil

36,250 cfm

410 A

Note: See Table 14, page 45 to determine unit capacity at other than nominal cfm.

For a computer-generated, job-specific selection, contact your local McQuay sales representative. For 50 Hz applications, derate the total capacity by

0.89; derate the sensible capacity by 0.94. All capacities are gross and do not account for fan motor heat.
Altitude and/or glycol selections are also available.

DB/WB Total Sensible DB WB

(ºF) (ºF) (MBH) (MBH) (ºF) (ºF) (GPM)

75.0/62.0

80.0/67.0

85.0/72.0

75.0/62.0

80.0/67.0

85.0/72.0

75.0/62.0

80.0/67.0

85.0/72.0

75.0/62.0

80.0/67.0

85.0/72.0

75.0/62.0

80.0/67.0

85.0/72.0

EWT

75 868 682 49.0 48.9 208
85 832 666 49.6 49.5 204
95 794 649 50.3 50.2 200
75 940 673 54.3 54.3 224
85 900 657 55.0 54.9 219
95 856 640 55.6 55.6 214
75 1017 662 59.8 59.7 241
85 973 646 60.4 60.3 235
95 925 629 61.0 61.0 229

75 983 778 49.1 49.1 233
85 941 759 49.7 49.7 229
95 896 739 50.4 50.3 224
75 1050 761 54.6 54.6 24.7
85 1018 749 55.1 55.1 245
95 969 730 55.7 55.7 240
75 1148 754 59.9 59.9 268
85 1099 736 60.5 60.5 262
95 1046 717 61.2 61.1 256

75 1062 837 49.0 49.0 252
85 1016 817 49.7 49.6 247
95 967 795 50.4 50.3 242
75 1151 827 54.4 54.3 271
85 1101 806 55.0 54.9 265
95 1047 785 55.7 55.6 259
75 1245 813 59.8 59.8 291
85 1190 793 60.4 60.4 284
95 1132 773 61.1 61.0 277

75 1140 897 49.0 48.9 271
85 1091 874 49.6 49.5 265
95 1039 851 50.3 50.2 260
75 1238 886 54.3 54.2 292
85 1183 864 54.9 54.9 285
95 1126 841 55.6 55.5 279
75 1340 872 59.7 59.7 314
85 1280 850 60.3 60.3 306
95 1217 828 61.0 60.9 299

75 1297 1024 49.2 49.0 311
85 1244 1000 49.8 49.6 306
95 1186 974 50.4 50.3 300
75 1403 1010 54.5 54.4 334
85 1346 987 55.1 55.0 328
95 1282 961 55.8 55.6 321
75 1514 992 60.0 59.9 358
85 1451 969 60.6 60.5 351
95 1382 945 61.2 61.1 343

Capacity LAT

Flow Rate

McQuay Catalog 860-9 41

Performance Data

Table 12: SWP 065–SWP130 (Large Tall Cabinet) Cooling Capacity

SWP 099HL DB/WB (ºF) EWB (ºF) TMBH SMBH LDB LWB GPM

75 1313 1032 49.0 48.9 314

75.0/62.0

(6) 15 hp Compressors

6-row Large DX Coil

36,250 cfm

410 A

SWP 105HS DB/WB (ºF) EWB (ºF) TMBH SMBH LDB LWB GPM

(8) 13 hp Compressors
6-row Standard DX Coil

36,500 cfm

410 A

SWP 105HL DB/WB (ºF) EWB (ºF) TMBH SMBH LDB LWB GPM

(8) 13 hp Compressors

6-row Large DX Coil

41,000 cfm

410 A

SWP 120HS DB/WB (ºF) EWB (ºF) TMBH SMBH LDB LWB GPM

(4) 13 hp, (4) 15 hp Compressors

6-row Standard DX Coil

36,500 cfm

410 A

SWP 120HL DB/WB (ºF) EWB (ºF) TMBH SMBH LDB LWB GPM

(4) 13 hp, (4) 15 hp Compressors

6-row Large DX Coil

42,000 cfm

410 A

Note: See Table 14, page 45 to determine unit capacity at other than nominal cfm.

For a computer-generated, job-specific selection, contact your local McQuay sales representative. For 50 Hz applications, derate the total capacity by

0.89; derate the sensible capacity by 0.94. All capacities are gross and do not account for fan motor heat.
Altitude and/or glycol selections are also available.

80.0/67.0

85.0/72.0

75.0/62.0

80.0/67.0

85.0/72.0

75.0/62.0

80.0/67.0

85.0/72.0

75.0/62.0

80.0/67.0

85.0/72.0

75.0/62.0

80.0/67.0

85.0/72.0

85 1259 1008 49.6 49.5 309
95 1200 982 50.2 50.1 303
75 1420 1018 54.3 54.3 338
85 1362 994 54.9 54.8 331
95 1297 969 55.6 55.5 324
75 1531 999 59.8 59.8 362
85 1468 976 60.4 60.3 355
95 1398 952 61.0 60.9 346

75 1390 1070 48.2 48.1 333
85 1334 1045 48.8 48.8 328
95 1275 1018 49.5 49.4 323
75 1517 1060 53.5 53.4 360
85 1454 1034 54.1 54.1 353
95 1387 1007 54.8 54.7 347
75 1654 1046 58.8 58.8 390
85 1583 1020 59.4 59.4 381
95 1508 993 60.1 60.1 373

75 1470 1161 49.1 49.1 350
85 1407 1132 49.7 49.7 344
95 1341 1103 50.4 50.3 337
75 1600 1148 54.4 54.3 378
85 1528 1119 55.0 55.0 369
95 1452 1090 55.7 55.6 361
75 1741 1133 59.7 59.7 408
85 1660 1104 60.4 60.3 398
95 1576 1074 61.1 61.0 388

75 1458 1101 47.4 47.4 352
85 1401 1075 48.1 48.0 347
95 1339 1047 48.8 48.7 342
75 1592 1091 52.7 52.6 381
85 1528 1064 53.3 53.3 374
95 1459 1036 54.0 54.0 368
75 1736 1076 58.0 58.0 412
85 1664 1050 58.7 58.7 403
95 1586 1021 59.4 59.4 395

75 1547 1208 48.7 48.7 371
85 1481 1178 49.4 49.3 364
95 1411 1147 50.0 50.0 357
75 1685 1195 54.0 53.9 401
85 1611 1165 54.6 54.6 392
95 1533 1134 55.3 55.3 384
75 1833 1178 59.4 59.3 433
85 1750 1148 60.0 60.0 422
95 1663 1117 60.7 60.6 412

42 McQuay Catalog 860-9

Performance Data

Table 12: SWP 065–SWP130 (Large Tall Cabinet) Cooling Capacity

SWP 130HS DB/WB (ºF) EWB (ºF) TMBH SMBH LDB LWB GPM

75 1546 1142 46.4 46.3 375

75.0/62.0

(8) 15 hp Compressors
6-row Standard DX Coil

36,500 cfm

410 A

SWP 130HL DB/WB (ºF) EWB (ºF) TMBH SMBH LDB LWB GPM

(8) 15 hp Compressors

6-row Large DX Coil

42,000 cfm

410 A

Note: See Table 14, page 45 to determine unit capacity at other than nominal cfm.

For a computer-generated, job-specific selection, contact your local McQuay sales representative. For 50 Hz applications, derate the total capacity by

0.89; derate the sensible capacity by 0.94. All capacities are gross and do not account for fan motor heat.
Altitude and/or glycol selections are also available.

80.0/67.0

85.0/72.0

75.0/62.0

80.0/67.0

85.0/72.0

85 1488 1115 47.1 47.0 370
95 1423 1085 47.8 47.7 364
75 1687 1131 51.7 51.6 405
85 1622 1103 52.4 52.3 399
95 1550 1073 47.8 47.8 364
75 1835 1114 57.1 57.1 438
85 1763 1087 57.8 57.7 429
95 1683 1057 58.5 58.5 422

75 1637 1248 47.8 47.8 394
85 1569 1217 48.5 48.4 387
95 1495 1184 49.2 49.2 380
75 1781 1234 53.1 53.1 426
85 1706 1203 53.8 53.8 409
95 1624 1170 54.5 54.5 409
75 1934 1215 58.5 58.5 459
85 1851 1185 59.2 59.2 449
95 1761 1152 59.9 59.9 439

McQuay Catalog 860-9 43

Performance Data

Waterside Economizer Capacity

Table 13: Waterside Economizer Coil Face Area

17.2 Square Feet 25.2 Square Feet

Nominal

EWT EAT

DB/WB

(ºF)

(ºF) (Btu/hr) (Btu/hr) (Btu/hr) (Btu/hr) (ºF) (Btu/hr) (Btu/hr) (Btu/hr) (Btu/hr)

75.0/

62.0

45

80.0/

67.0

75.0/

62.0

55

80.0/

67.0

Nominal

Airflow

EWT EAT

(ºF) DB/WB (cfm) (Btu/hr) (Btu/hr) (cfm) (Btu/hr) (Btu/hr) (ºF) (Btu/hr) (Btu/hr) (Btu/hr) (Btu/hr)

75.0/

62.0

45

80.0/

67.0

75.0/

62.0

55

80.0/

67.0

EWT EAT

DB/WB

(ºF)

(ºF) (Btu/hr) (Btu/hr) (Btu/hr) (Btu/hr) (ºF) (Btu/hr) (Btu/hr) (Btu/hr) (Btu/hr)

75.0/

62.0

45

80.0/

67.0

75.0/

62.0

55

80.0/

67.0

EWT EAT

DB/WB

(ºF)

(ºF) (Btu/hr) (Btu/hr) (Btu/hr) (Btu/hr) (ºF) (Btu/hr) (Btu/hr) (Btu/hr) (Btu/hr)

75.0/

62.0

45

80.0/

67.0

75.0/

62.0

55

80.0/

67.0

Flow

Airflow

Rate

(cfm) (gpm)

43.0 118215 104308

35.7 105670 98166 81.7 231712 204722 58.8 158718 140000 168.0 307473 268743

28.4 89506 88546 65.0 210613 194026 46.8 137193 129347 133.4 278405 254363

43.0 153149 113374 98.4 325916 233385

35.7 133765 105547 81.7 301172 223270 58.8 205708 152163 168.0 400795 293543

28.4 109640 95570 65.0 268225 209766 46.8 172394 138737 133.4 355858 275180

4300

43.0 76546 76546 98.4 15226 152261

35.7 71725 71725 81.7 147128 147128 58.8 103013 103013 168.0 193879 193879

28.4 63936 63936 98.4 138920 138920 46.8 94517 94517 133.4 183078 183078

43.0 997707 92120 81.7 201228 183427

35.7 91330 87908 65.0 190980 178438 58.8 134265 12384 168.0 253334 234147

28.4 80220 80201 98.4 176565 170614 46.8 119858 116468 133.4 234216 224149

Flow

Nominal

Rate

Airflow

(gpm)

120.1 300141 252991

99.7 277844 242600 125.1 345207 300757 115.0 297133 260929 166.8 490321 413441

79.4 247291 227625 99.2 311526 284209 91.3 275216 249921 132.4 450026 394389

120.1 396773 279042 150.6 488735 344393

99.7 361929 264763 125.1 450654 328782 115.0 387874 285299 166.8 647073 455704

79.4 314626 245527 99.2 376624 298517 91.3 353829 271344 132.4 584177 429857

10000

120.1 183343 183343 150.6 224803 224803

99.7 176480 176480 125.1 217345 217345 115.0 186084 186084 166.8 297975 297975

79.4 165073 165073 99.2 204979 204979 91.3 177930 177930 132.4 285222 285222

120.1 246079 219190 150.6 300807 269528

99.7 231002 212437 125.1 284619 262106 115.0 242136 225955 166.8 398913 356710

79.4 210726 202139 99.2 262399 250687 91.3 227979 218163 132.4 372003 344165

Nominal

Flow

Airflow

Rate

(cfm) (gpm)

155.4 410014 333157

129.0 382469 320590 168.0 495046 416563 158.9 504119 410660 221.0 696784 572268

102.3 344216 302774 133.4 453219 396846 126.1 464227 392287 176.2 647897 549552

155.4 546475 370822 202.5 699525 478358

129.0 505143 353584 168.0 654992 459848 158.9 669318 455923 221.0 925183 634763

102.3 445328 329064 133.4 588178 432393 126.1 608158 430457 176.2 847943 602685

12500

155.4 240254 240254 202.5 309206 309206

129.0 233413 233413 168.0 301287 301287 158.9 295956 295956 221.0 411289 411289

102.3 221426 221426 133.4 287860 287860 126.1 285323 285323 176.2 397647 397647

155.4 332781 285581 202.5 425016 368879

129.0 314692 278020 168.0 404552 360100 158.9 408475 351794 221.0 562770 490066

102.3 288623 266420 133.4 375762 346898 126.1 381148 340123 176.2 529279 475352

Nominal

Flow

Airflow

Rate

(cfm) (gpm)

207.3 571870 453820

172.0 542915 440594 325.6 958766 800336 259.3 797101 650336 333.0 991370 818465

136.5 498560 420239 258.3 903504 774109 264.8 1119379 747621 264.8 931326 790353

207.3 768359 509542 391.7 1339061 913508

172.0 720933 489427 325.6 1277444 887940 259.3 1059374 722329 333.0 1318009 907963

136.5 653719 461401 258.3 1183607 849179 264.8 755519 681094 264.8 1221011 867762

16500

207.3 324297 324297 391.7 584577 584577

172.0 317813 317813 325.6 572669 572669 259.3 466859 466859 333.0 585855 585855

136.5 306263 306263 258.3 554618 554618 264.8 669195 566903 264.8 568232 568232

207.3 461349 385934 391.7 804567 700005

172.0 439485 377081 325.6 773282 686291 259.3 642967 555976 333.0 797971 700186

136.5 410083 364614 258.3 732310 667233 264.8 732310 667233 264.8 755519 681094

Capacity

Total Sensible

29.8 Square Feet 40.8 Square Feet

Capacity

Total Sensible

45.2 Square Feet 52.5 Square Feet

Capacity

Total Sensible

60.9 Square Feet 71.3 Square Feet

Capacity

Total Sensible

Nominal

Flow

Airflow

Rate

(cfm) (gpm)

98.4 247233 212158

8750

Flow

Nominal

Rate

Airflow

(gpm)

150.6 369070 311969

12500

Nominal

Flow

Airflow

Rate

(cfm) (gpm)

202.5 526221 430876

16500

Nominal

Flow

Airflow

Rate

(cfm) (gpm)

391.7 1003513 820997

32000

Capacity

Total Sensible

Capacity

Total Sensible

Capacity

Total Sensible

Capacity

Total Sensible

Note: See Table 15, page 45 to determine capacity at other than nominal cfm.

Nominal

Airflow

EWT EAT

DB/WB

(ºF)

75.0/

62.0

45

80.0/

67.0

75.0/

62.0

55

80.0/

67.0

Nominal

Airflow

EWT EAT

DB/WB

(ºF)

75.0/

62.0

45

80.0/

67.0

75.0/

62.0

55

80.0/

67.0

Nominal

Airflow

EWT EAT

DB/WB

(ºF)

75.0/

62.0

45

80.0/

67.0

75.0/

62.0

55

80.0/

67.0

Nominal

Airflow

EWT EAT

DB/WB

(ºF)

75.0/

62.0

45

80.0/

67.0

75.0/

62.0

55

80.0/

67.0

Nominal

Flow

Airflow

Rate

(cfm) (gpm)

70.8 174932 147468

70.8 230503 162275 202.5 434409 307307

5750

70.8 107987 107987 202.5 200490 200490

70.8 145162 128577 202.5 267384 240686

Nominal

Flow

Airflow

Rate

(cfm) (gpm)

138.4 312851 268478

138.4 414192 296028 200.9 689345 473235

11250

138.4 191437 191437 200.9 305575 305575

138.4 252970 231305 200.9 418034 365034

Nominal

Flow

Airflow

Rate

(cfm) (gpm)

191.3 530260 422617

191.3 711594 473799 267.1 979631 657637

15500

191.3 301945 301945 267.1 419653 419653

191.3 426964 359394 267.1 586400 500035

Nominal

Flow

Airflow

Rate

(cfm) (gpm)

312.1 834084 667291

312.1 1119379 747621 402.0 1388369 937345

24750

312.1 475642 475642 402.0 597600 597600

312.1 669195 566903 402.0 829035 713591

Capacity

Total Sensible

Capacity

Total Sensible

Capacity

Total Sensible

Capacity

Total Sensible

Nominal

Flow

Airflow

Rate

(cfm) (gpm)

202.5 328039 278466

11250

Nominal

Flow

Airflow

Rate

(cfm) (gpm)

200.9 518514 426470

16500

Nominal

Flow

Airflow

Rate

(cfm) (gpm)

267.1 731367 588143

22000

Nominal

Flow

Airflow

Rate

(cfm) (gpm)

402.0 1037546 839692

32000

Capacity

Total Sensible

Capacity

Total Sensible

Capacity

Total Sensible

Capacity

Total Sensible

44 McQuay Catalog 860-9

Performance Data

Table 14: Waterside Economizer Capacity Correction Factors

Description

Total Capacity 0.892 0.920 0.947 0.975 1.000 1.025 1.048 1.071 1.093

Sensible Capacity 0.848 0.886 0.925 0.963 1.000 1.037 1.072 1.107 1.142

–20% –15% –10% –5% Standard 5% 10% 15% 20%

Table 15: DX Cooling Capacity Correction Multipliers

Description

Total Capacity 0.957 0.969 0.981 0.991 1.000 1.009 1.017 1.023 1.030

Sensible Capacity 0.895 0.921 0.948 0.974 1.000 1.026 1.052 1.077 1.102

Compressor Motor kW 0.987 0.989 0.996 0.998 1.000 1.004 1.006 1.008 1.011

–20% –15% –10% –5% Standard 5% 10% 15% 20%

Heating Capacity Data

Hot Water Coil Capacity (2-row)

Table 16: Entering Water 160ºFand Entering Air 60ºF

Minimum

Cabinet Size

Small 19.8

Small Tall 19.8

Medium 32.3

Large 36.7

Large Tall 45.8

Note: 1 Based on 12 fpi aluminum HI-F5 fins with single serpentine.

2 Smallest standard coil face area available using McQuay Vision™ air handling unit platform.

Coil Face

Area (ft

2)2

1

Nominal
Air Flow

(cfm)

4300 241.3 125.8 111.3 14 0.09
5750 312.2 126.9 109.7 19 0.15
8750 441.4 129.2 106.1 29 0.30

5750 312.2 126.9 109.7 19 0.15
10000 490.2 130.1 104.8 33 0.37
11250 537.0 130.9 103.7 37 0.45
12500 581.8 131.6 102.6 41 0.53
11250 613.3 126.8 109.9 37 0.20
12500 667.9 127.4 108.9 41 0.24
16500 831.8 129.3 106.1 54 0.38
15500 836.5 127.1 109.4 51 0.34
16500 879.0 128.5 108.7 54 0.38
22000 1097.8 129.6 105.6 72 0.61
16500 919.2 126.0 110.9 54 0.21
24750 1266.3 128.8 106.8 81 0.41
32000 1536.9 130.7 103.9 105 0.63
32500 1554.6 130.8 103.7 107 0.65

Total

Capacity

(MBH)

Percent Standard CFM

Percent Standard CFM

LWT

(ºF)

LBD

(ºF)

Flow Rate

(gpm)

Air Pressure

Drop

(in. wg)

Steam Coil Capacity

1

Table 17: Steam Pressure 5 psi and Entering Air 60ºF

Cabinet Size

Small 19.8

Small Tall 19.8

Medium 32.3

Large 36.7

Large Tall 45.8

Note: 1 Based on 5 psi steam pressure and 6 fpi aluminum HI-F5 fins.

2 Smallest standard coil face area available using McQuay Vision™ air handling unit platform.

Minimum Coil Face

Area (ft2)

2

Nominal

Air Flow (cfm)

4300 227.5 119.0 0.03
5750 330.1 112.5 0.05
8750 420.1 103.9 0.10

5750 330.1 112.5 0.05
10000 452.0 101.3 0.13
11250 481.4 99.1 0.16
12500 508.9 97.2 0.20
11250 598.2 108.6 0.07
12500 635.4 106.5 0.08
16500 740.8 101.1 0.13
15500 758.5 104.8 0.12
16500 785.3 103.5 0.13
22000 916.9 98.1 0.23
16500 865.8 108.0 0.07
24750 1083.9 100.0 0.15
32000 1239.8 95.4 0.24
32500 1249.7 95.2 0.24

Total Capacity

(MBH)

LBD (ºF)

Air Pressure Drop

(in. wg)

McQuay Catalog 860-9 45

Performance Data

Electric Heat

Table 18: Electric Heat – 60 Hz, 3 Phase

SWP Unit Size

023 through 035 27.8 94 77.2 34.0 116 85.6 34.0 116 42.8 34.0 116 34.2
039 through 050 27.8 94 77.2 34.0 116 85.6 68.0 232 85.6 68.0 232 68.4
044 through 066 27.8 94 77.2 34.0 116 85.6 68.0 232 85.6 68.0 232 68.4
062 through 088 55.6 190 154.4 68.0 232 170.9 68.0 232 85.6 68.0 232 68.4
065 through 130 55.6 190 154.4 68.0 232 170.9 68.0 232 85.6 68.0 232 68.4

Component Pressure Drops

Table 19: SWP 023 through 033 (pressure drop in inches wg)

Nominal
Air Flow

(cfm)

4000 0.26 0.13 0.09 0.11 0.09 0.14 0.07 0.24 0.01 0.00
6000 0.48 0.25 0.18 0.20 0.16 0.25 0.13 0.43 0.01 0.01
8000 0.73 0.41 0.31 0.31 0.25 0.40 0.21 0.64 0.03 0.01

10000 1.02 0.6 0.45 0.42 0.34 0.57 0.29 0.88 0.04 0.01

Nominal
Air Flow

(cfm)

6000 0.27 0.13 0.09 0.11 0.10 0.14 0.08 0.25 0.01 0.01

8000 0.41 0.21 0.16 0.17 0.14 0.22 0.12 0.37 0.02 0.01
10000 0.58 0.31 0.23 0.24 0.20 0.32 0.16 0.51 0.04 0.01
12000 0.75 0.43 0.32 0.32 0.26 0.42 0.21 0.66 0.06 0.02
14000 0.95 0.56 0.42 0.40 0.32 0.53 0.27 0.82 0.08 0.03
16000 1.11 0.6 0.53 0.48 0.39 0.65 0.33 0.99 0.10 0.04

Note: DX pressure drops are wet coil and economizers are dry coil.

All units must have a DX coil pressure drop.
Based on 32" high plenum with maximum allowed opening.

Standard Coil Filters Discharge Plenum

Evaporator Economizer

Evaporator Economizer

208 V/60 Hz/3 Phase 230 V/60 Hz/3 Phase 460 V/60 Hz/3 Phase 575 V/60 Hz/3 Phase

kW MBH FLA kW MBH FLA kW MBH FLA kW MBH FLA

2

17.2 ft
2", 30% 2", 75% 4", 30% 4", 65% 4", 75% 2", 85%

Left &

Right

Large Coil Filters Discharge Plenum

2

25.2 ft
2", 30% 2", 75% 4", 30% 4", 65% 4", 75% 2", 85%

Left &

Right

Front

& Back

Front

& Back

Table 20: SWP 039 through 050 (pressure drop in inches wg)

Nominal
Air Flow

(cfm)

6000 0.27 0.13 0.09 0.11 0.10 0.14 0.08 0.25 0.01 0.01

8000 0.41 0.21 0.16 0.17 0.14 0.22 0.12 0.37 0.03 0.01
10000 0.55 0.31 0.23 0.24 0.20 0.32 0.16 0.51 0.04 0.01
12000 0.72 0.43 0.32 0.32 0.26 0.42 0.21 0.66 0.06 0.02
16000 0.88 0.56 0.42 0.40 0.32 0.53 0.27 0.82 0.08 0.03

Nominal
Air Flow

(cfm)

10000 0.45 0.24 0.17 0.19 0.16 0.24 0.13 0.40 0.04 0.01
12000 0.59 0.32 0.24 0.25 0.20 0.32 0.17 0.52 0.06 0.02
14000 0.74 0.42 0.31 0.31 0.25 0.41 0.21 0.65 0.08 0.03
16000 0.88 0.53 0.39 0.38 0.31 0.50 0.25 0.78 0.10 0.04

Note: DX pressure drops are wet coil and economizers are dry coil.

All units must have a DX coil pressure drop.
Based on 32" high plenum with maximum allowed opening.

Standard Coil Filters Discharge Plenum

2

25.2 ft

Evaporator Economizer

2", 30% 2", 75% 4", 30% 4", 65% 4", 75% 2", 85%

Left &

Right

Large Coil Filters Discharge Plenum

2

29.8 ft

Evaporator Economizer

2", 30% 2", 75% 4", 30% 4", 65% 4", 75% 2", 85%

Left &

Right

Front

& Back

Front

& Back

46 McQuay Catalog 860-9

Performance Data

Table 21: SWP 044 through 065 (pressure drop in inches wg)

Nominal
Air Flow

(cfm)

10000 0.28 0.14 0.10 0.12 0.10 0.15 0.08 0.26 0.03 0.01
12000 0.37 0.19 0.14 0.16 0.13 0.20 0.10 0.33 0.05 0.01
14000 0.46 0.24 0.18 0.20 0.16 0.25 0.13 0.42 0.06 0.02
16000 0.48 0.31 0.23 0.24 0.19 0.31 0.16 .050 0.08 0.02
18000 0.65 0.38 0.28 0.28 0.23 0.37 0.19 0.59 0.10 0.03
20000 0.76 0.45 0.34 0.33 0.27 0.44 .022 0.69 0.13 0.04
22000 0.86 0.53 0.40 0.38 0.31 0.51 0.26 0.79 0.16 0.04
24000 0.98 0.61 0.46 0.43 0.35 0.58 0.29 0.89 0.18 0.05

Nominal
Air Flow

(cfm)

12000 0.32 0.16 0.11 0.13 0.11 0.17 0.09 .028 0.05 0.01
14000 0.40 0.21 0.15 0.17 0.14 0.21 0.11 0.35 0.06 0.02
16000 0.55 0.26 0.19 0.20 0.17 0.26 0.13 0.43 0.08 0.02
18000 0.56 0.32 0.23 0.24 0.20 0.31 0.16 0.50 0.10 0.03
20000 0.64 0.38 0.27 0.28 0.23 0.37 0.19 0.58 0.13 0.04
22000 0.74 0.44 0.32 0.32 0.26 0.42 0.22 0.67 0.16 0.04
24000 0.84 0.51 0.38 0.36 0.29 0.48 0.25 0.76 0.18 0.05
26000 0.94 0.59 0.43 0.41 0.33 0.55 0.28 0.85 0.22 0.06

Note: DX pressure drops are wet coil and economizers are dry coil.

All units must have a DX coil pressure drop.
Based on 32" high plenum with maximum allowed opening.

Standard Coil Filters Discharge Plenum

2

40.8 ft

Evaporator Economizer

2", 30% 2", 75% 4", 30% 4", 65% 4", 75% 2", 85%

Left &

Right

Large Coil Filters Discharge Plenum

2

45.8 ft

Evaporator Economizer

2", 30% 2", 75% 4", 30% 4", 65% 4", 75% 2", 85%

Left &

Right

Front

& Back

Front

& Back

Table 22: SWP 062 through 088 (pressure drop in inches wg)

Nominal
Air Flow

(cfm)

12000 0.26 0.12 0.09 0.11 0.09 0.14 0.07 0.23 0.03 0.01
14000 0.38 .012 0.12 0.14 0.11 0.17 0.09 0.29 0.04 0.01
16000 0.45 0.16 0.15 0.16 0.14 0.21 0.11 0.35 0.05 0.01
18000 0.53 0.19 0.18 0.20 0.16 0.25 0.13 0.42 0.07 0.02
20000 0.62 0.23 0.22 0.23 0.19 0.30 0.15 0.48 0.09 0.02
22000 0.70 0.27 0.26 0.26 0.21 0.34 0.18 0.55 0.10 0.03
24000 0.80 0.31 0.30 0.30 0.24 0.39 0.20 .062 0.12 0.03
26000 0.91 0.35 0.34 0.33 0.27 0.44 0.23 0.70 0.14 0.04
28000 1.01 0.40 0.39 0.37 0.30 0.50 0.25 0.78 0.17 0.04
30000 1.13 0.45 0.44 0.41 0.33 0.55 0.28 0.86 0.19 0.05

Note: DX pressure drops are wet coil and economizers are dry coil.

All units must have a DX coil pressure drop.
Based on 32" high plenum with maximum allowed opening.

Standard Coil Filters Discharge Plenum

2

52.5 ft

Evaporator Economizer

2", 30% 2", 75% 4", 30% 4", 65% 4", 75% 2", 85%

Left &

Right

Front

& Back

McQuay Catalog 860-9 47

Performance Data

Table 23: SWP 065 through 130 (pressure drop in inches wg)

Nominal
Air Flow

(cfm)

16000 0.36 0.16 0.11 0.13 0.11 0.17 0.09 0.29 0.04 0.01
18000 0.43 0.19 0.14 0.16 0.13 0.20 0.11 0.34 0.05 0.02
20000 0.52 0.23 0.17 0.18 0.15 0.24 0.12 0.39 0.06 0.02
22000 0.60 0.27 0.20 .021 0.17 0.27 0.14 0.45 0.08 0.03
24000 0.68 0.31 0.23 0.24 0.20 0.31 0.16 0.51 0.09 0.03
26000 0.77 0.35 0.26 0.27 0.22 0.35 0.18 0.57 0.11 0.04
28000 0.86 0.40 0.30 0.30 0.24 0.40 0.20 0.63 0.13 0.04
30000 0.94 0.45 0.34 0.33 0.27 0.44 0.22 0.69 0.15 0.05
32000 1.03 0.51 0.38 0.37 0.30 0.49 0.25 0.75 0.17 0.06
34000 1.13 0.56 0.42 0.40 0.32 0.53 0.27 0.83 0.19 0.06
36000 1.22 0.62 0.47 0.43 0.35 0.58 0.29 0.90 0.21 0.07

Nominal
Air Flow

(cfm)

18000 0.34 0.15 0.10 0.12 0.10 0.16 0.08 0.27 0.05 0.02
20000 0.41 0.17 0.13 0.15 0.12 0.19 0.10 0.31 0.06 0.02
22000 0.48 0.20 0.15 0.17 0.14 0.21 0.11 0.36 0.08 0.03
24000 0.54 0.24 0.17 0.19 0.16 0.25 0.13 0.40 0.09 0.03
26000 0.61 0.27 0.20 0.21 0.18 0.28 0.14 0.45 0.11 0.04
28000 0.68 0.31 0.23 0.24 0.20 0.31 0.16 0.50 0.13 0.04
30000 0.75 0.35 0.26 0.26 0.22 0.35 0.18 0.55 0.15 0.05
32000 0.83 0.39 0.29 0.29 0.24 0.38 0.19 0.61 0.17 0.06
34000 0.90 0.43 0.32 0.32 0.26 0.42 0.21 0.66 0.19 0.06
36000 0.97 0.47 0.35 0.34 0.28 0.46 0.23 0.72 0.21 0.07
38000 1.04 0.52 0.39 0.37 0.30 0.50 0.25 0.78 0.23 0.08
40000 1.13 0.57 0.43 0.40 .032 0.54 0.27 0.83 0.26 0.09
42000 1.21 0.62 0.46 0.43 0.35 0.58 0.29 0.89 0.28 0.10

Note: DX pressure drops are wet coil and economizers are dry coil.

All units must have a DX coil pressure drop.
Based on 32" high plenum with maximum allowed opening.

Standard Coil Filters Discharge Plenum

2

60.9 ft

Evaporator Economizer

2", 30% 2", 75% 4", 30% 4", 65% 4", 75% 2", 85%

Left &

Right

Large Coil Filters Discharge Plenum

2

71.3 ft

Evaporator Economizer

2", 30% 2", 75% 4", 30% 4", 65% 4", 75% 2", 85%

Left &

Right

Front

& Back

Front

& Back

48 McQuay Catalog 860-9

Total Unit Water Pressure Drop

SWP023 through SWP033

Performance Data

Figure 24: Mechanical Cooling Only

Figure 25: Standard Economizer Coil

Figure 26: Mechanical Cooling and WRV

Figure 27: Large Economizer Coil

NOTE: Total water pressure drop varies depending on a units selected options. Only use the specific chart which reflects your
unit. The above figures illustrate total water pressure drop (WPD) for each associated model number.

• Use Figure 24 if no water side economizer coil or water regulating valve is provided.

• Use Figure 25 for standard economizer coils and Figure 27 for large economizer coils.

• Use Figure 26 if a water regulating valve is provided.

McQuay Catalog 860-9 49

Performance Data

SWP039 through SWP050

Figure 28: Mechanical Cooling Only

Figure 29: Standard Economizer Coil

Figure 30: Mechanical Cooling and WRV

Figure 31: Large Economizer Coil

NOTE: Total water pressure drop varies depending on a units selected options. Only use the specific chart which reflects your
unit. The above figures illustrate total water pressure drop (WPD) for each associated model number.

• Use Figure 28 if no water side economizer coil or water regulating valve is provided.

• Use Figure 29 for standard economizer coils and Figure 31 for large economizer coils.

• Use Figure 30 if a water regulating valve is provided.

50 McQuay Catalog 860-9

SWP044 through SWP055

Performance Data

Figure 32: Mechanical Cooling Only

Figure 33: Standard Economizer Coil

Figure 34: Mechanical Cooling and WRV

Figure 35: Large Economizer Coil

NOTE: Total water pressure drop varies depending on a units selected options. Only use the specific chart which reflects your
unit. The above figures illustrate total water pressure drop (WPD) for each associated model number.

• Use Figure 32 if no water side economizer coil or water regulating valve is provided.

• Use Figure 33 for standard economizer coils and Figure 35 for large economizer coils.

• Use Figure 34 if a water regulating valve is provided.

McQuay Catalog 860-9 51

Performance Data

SWP062 through SWP088

Figure 36: Mechanical Cooling Only

Figure 37: Standard Economizer Coil

Figure 38: Mechanical Cooling and WRV

NOTE: Total water pressure drop varies depending on a units selected options. Only use the specific chart which reflects your
unit. The above figures illustrate total water pressure drop (WPD) for each associated model number.

• Use Figure 36 if no water side economizer coil or water regulating valve is provided.

• Use Figure 37 for standard economizer coils.

• Use Figure 38 if a water regulating valve is provided.

52 McQuay Catalog 860-9

SWP065 through SWP130

Performance Data

Figure 39: Mechanical Cooling Only

Figure 40: Standard Economizer Coil

Figure 41: Mechanical Cooling and WRV

Figure 42: Large Economizer Coil

NOTE: Total water pressure drop varies depending on a units selected options. Only use the specific chart which reflects your
unit. The above figures illustrate total water pressure drop (WPD) for each associated model number.

• Use Figure 39 if no water side economizer coil or water regulating valve is provided.

• Use Figure 40 for standard economizer coils and Figure 42 for large economizer coils.

• Use Figure 41 if a water regulating valve is provided.

McQuay Catalog 860-9 53

Performance Data

1

.

5

bhp

2 bhp

3

b

h

p

h

p

hp

0

b

h

p

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

6.5

7.0

7.5

8.0

8.5

STATIC PRESSURE (IN. OF WATER)

0.0

2.0

4.0

CFM (IN 1,000's)

McQUAY INTERNATIONAL FAN SELECTION

3

6

0

0

r

p

m

3

4

0

0

r

p

m

3

2

0

0

r

p

m

3

0

0

0

r

p

m

2

8

0

0

r

p

m

2

6

0

0

r

p

m

2

4

0

0

r

p

m

2200 rpm

2000 rpm

1

8

0

0

r

p

m

1

6

0

0

r

p

m

1

4

0

0

r

p

m

1

2

0

0

r

p

m

1000 rpm

4

0

0

0

r

p

m

3

8

0

0

r

p

m

2

b

h

p

hp

5

b

h

p

h

p

p

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

6.5

7.0

7.5

8.0

8.5

9.0

STATIC PRESSURE (IN. OF WATER)

0.0

2.0

4.0

6.0

CFM (IN 1,000's)

McQUAY INTERNATIONAL FAN SELECTION

3

4

0

0

r

p

m

3

6

0

0

r

p

m

3

2

0

0

r

p

m

3

0

0

0

r

p

m

2

8

0

0

r

p

m

2

6

0

0

r

p

m

2

4

0

0

r

p

m

2200 rpm

2000 rpm

1

8

0

0

r

p

m

1

6

0

0

rp

m

1

4

0

0

r

p

m

1

2

0

0

r

p

m

8

0

0

r

p

m

1000 rpm

Fan Curves

Figure 43: 13.5" Diameter, 9-Blade Fan

1

bhp

1

7

.

5

b

5

b

Figure 44: 15.0" Diameter, 9-Blade Fan

1

0

b

h

7

.

5

b

1

p

.

5

b

h

p

1

b

h

3

b

54 McQuay Catalog 860-9

Figure 45: 16.5", 9-Blade Fan

1

b

h

p

2

b

h

p

hp

hp

h

p

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

6.5

7.0

7.5

STATIC PRESSURE (IN. OF WATER)

0.0

2.0

4.0

6.0

8.0

CFM (IN 1,000's)

McQUAY INTERNATIONAL FAN SELECTION

2

6

0

0

r

p

m

2

8

0

0

r

p

m

3

0

0

0

r

p

m

2

4

0

0

r

p

m

2

2

0

0

r

p

m

2

0

0

0

r

p

m

1

8

0

0

r

p

m

1

6

0

0

r

p

m

1

4

0

0

r

p

m

1

2

0

0

r

p

m

1

0

0

0

r

p

m

8

0

0

r

p

m

6

0

0

r

p

m

1

b

h

p

1

.

5

b

h

p

5

bhp

hp

hp

hp

h

p

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

6.5

7.0

7.5

8.0

8.5

9.0

STATIC PRESSURE (IN. OF WATER)

0.0

2.0

4.0

6.0

8.0

10.0

CFM (IN 1,000's)

McQUAY INTERNATIONAL FAN SELECTION

2

8

0

0

r

p

m

3

0

0

0

r

p

m

2

6

0

0

r

p

m

2

4

0

0

r

p

m

2

2

0

0

r

p

m

2

0

0

0

r

p

m

1

8

0

0

r

p

m

1600 rpm

1400 rpm

1

2

0

0

r

p

m

1

0

0

0

r

p

m

8

0

0

r

p

m

600 rpm

Performance Data

1

.

5

b

h

p

3

b

h

p

1

0

b

7

.

5

b

5

b

Figure 46: 18.2", 9-Blade Fan

2

0

b

1

5

b

1

0

b

7

.

5

b

3

2

b

h

p

bhp

McQuay Catalog 860-9 55

Performance Data

1

b

h

p

1

.

5

b

h

p

2

b

h

p

h

p

hp

hp

h

p

2

5

b

h

p

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

6.5

7.0

7.5

8.0

8.5

9.0

STATIC PRESSURE (IN. OF WATER)

0.0

2.0

4.0

6.0

8.0

10.0

12.0

CFM (IN 1,000's)

McQUAY INTERNATIONAL FAN SELECTION

2

6

0

0

r

p

m

2

8

0

0

r

p

m

2

4

0

0

r

p

m

2

2

0

0

r

p

m

2

0

0

0

r

p

m

1

8

0

0

r

p

m

1

6

0

0

r

p

m

1400 rpm

1200 rpm

1

0

0

0

r

p

m

8

0

0

r

p

m

600 rpm
400 rpm

1

b

h

p

1

.

5

b

h

p

2

b

h

p

hp

p

hp

h

p

hp

0

b

h

p

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

6.5

7.0

7.5

8.0

8.5

9.0

STATIC PRESSURE (IN. OF WATER)

0.0

2.0

4.0

6.0

8.0

10.0

12.0

14.0

CFM (IN 1,000's)

McQUAY INTERNATIONAL FAN SELECTION

2

6

0

0

r

p

m

2

4

0

0

r

p

m

2

2

0

0

r

p

m

2

0

0

0

r

p

m

1

8

0

0

r

p

m

1

6

0

0

r

p

m

1

4

0

0

r

p

m

1200 rpm

1

0

0

0

r

p

m

8

0

0

r

p

m

6

0

0

r

p

m

400 rpm

Figure 47: 20.0", 9-Blade Fan

2

0

b

1

5

b

1

0

b

7

.

5

3

b

h

p

5

b

h

p

b

Figure 48: 22.2", 9-Blade Fan

2

5

b

2

0

b

1

5

b

1

0

b

h

7

.

5

b

3

b

h

p

5

b

h

p

56 McQuay Catalog 860-9

Figure 49: 24.5", 9-Blade Fan

1

b

h

p

1

.

5

b

h

p

2

b

h

p

p

p

p

p

h

p

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

6.5

7.0

7.5

8.0

8.5

9.0

STATIC PRESSURE (IN. OF WATER)

0.0

2.0

4.0

6.0

8.0

10.0

12.0

14.0

16.0

18.0

CFM (IN 1,000's)

McQUAY INTERNATIONAL FAN SELECTION

2

2

0

0

r

p

m

2

0

0

0

r

p

m

1

8

0

0

r

p

m

1

6

0

0

r

p

m

1

4

0

0

r

p

m

1200 rpm

1000 rpm

8

0

0

r

p

m

6

0

0

r

p

m

4

0

0

r

p

m

1

.

5

b

h

p

5

b

h

p

p

p

h

p

h

p

4

0

hp

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

6.5

7.0

7.5

8.0

STATIC PRESSURE (IN. OF WATER)

0.0

2.0

4.0

6.0

8.0

10.0

12.0

14.0

16.0

18.0

20.0

22.0

CFM (IN 1,000's)

McQUAY INTERNATIONAL FAN SELECTION

1

8

0

0

r

p

m

2

0

0

0

r

p

m

1

6

0

0

r

p

m

1

4

0

0

r

p

m

1

2

0

0

r

p

m

1000 rpm

800 rpm

6

0

0

r

p

m

4

0

0

r

p

m

Performance Data

3

0

b

2

5

b

h

2

0

b

h

1

5

b

h

1

0

b

7

.

3

b

h

p

5

b

h

p

5

b

h

h

p

Figure 50: 27.0", 9-Blade Fan

1

b

h

p

2

b

3

0

b

3

b

h

b

hp

p

7

.

5

b

h

p

2

5

b

2

0

b

h

1

5

b

h

1

0

b

h

p

McQuay Catalog 860-9 57

Performance Data

1

0

b

h

p

p

p

p

p

p

h

p

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

6.5

7.0

7.5

8.0

8.5

9.0

STATIC PRESSURE (IN. OF WATER)

0.0

5.0

10.0

15.0

20.0

25.0

CFM (IN 1,000's)

McQUAY INTERNATIONAL FAN SELECTION

1

7

0

0

r

p

m

1

8

0

0

r

p

m

1

6

0

0

r

p

m

1

5

0

0

r

p

m

1

4

0

0

r

p

m

1

3

0

0

r

p

m

1

2

0

0

r

p

m

1

0

0

0

r

p

m

9

0

0

r

p

m

8

0

0

r

p

m

700 rpm
600 rpm
500 rpm

4

0

0

r

p

m

0

1

1

0

r

p

m

1

b

h

p

2

b

h

p

7

.

5

b

h

p

1

0

bhp

p

p

p

p

h

p

h

p

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

6.5

7.0

7.5

8.0

8.5

9.0

STATIC PRESSURE (IN. OF WATER)

0.0

5.0

10.0

15.0

20.0

25.0

30.0

CFM (IN 1,000's)

McQUAY INTERNATIONAL FAN SELECTION

1

6

0

0

r

p

m

1

7

0

0

r

p

m

1500 rpm

1

4

0

0

r

p

m

1

3

0

0

r

p

m

1

2

0

0

r

p

m

1

1

0

0

r

p

m

1

0

0

0

r

p

m

9

0

0

r

p

m

8

0

0

r

p

m

700 rpm

600 rpm
500 rpm

4

0

0

r

p

m

3

0

0

r

p

m

Figure 51: 30.0", 9-Blade Fan

5

0

b

4

0

b

h

3

0

b

h

2

5

b

h

2

0

b

h

1

7

3

2

1

.

1

b

h

p

b

5

b

h

p

h

bh

p

p

5

b

h

p

.

5

b

hp

5

b

h

Figure 52: 33.0", 9-Blade Fan

5

1

.

5

b

h

p

3

b

h

p

b

h

p

6

0

b

5

0

b

4

0

b

h

3

0

b

h

2

5

b

h

2

0

b

h

1

5

bhp

58 McQuay Catalog 860-9

Figure 53: 36.5", 9-Blade Fan

2

b

h

p

5

b

h

p

hp

hp

hp

hp

hp

hp

7

5

h

p

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

6.5

7.0

7.5

8.0

8.5

9.0

STATIC PRESSURE (IN. OF WATER)

0.0

5.0

10.0

15.0

20.0

25.0

30.0

35.0

CFM (IN 1,000's)

McQUAY INTERNATIONAL FAN SELECTION

1

4

0

0

r

p

m

1

5

0

0

r

p

m

1

3

0

0

r

p

m

1

2

0

0

r

p

m

1

1

0

0

r

p

m

1

0

0

0

r

p

m

9

0

0

r

p

m

8

0

0

r

p

m

700 rpm

600 rpm

5

0

0

r

p

m

4

0

0

r

p

m

300 rpm

1

b

h

p

1

.

5

b

h

p

5

b

h

p

hp

hp

hp

h

p

h

p

p

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

6.5

7.0

7.5

8.0

8.5

9.0

STATIC PRESSURE (IN. OF WATER)

0.0

5.0

10.0

15.0

20.0

25.0

30.0

35.0

40.0

45.0

CFM (IN 1,000's)

McQUAY INTERNATIONAL FAN SELECTION

1

3

0

0

r

p

m

1

4

0

0

r

p

m

1

2

0

0

r

p

m

1

1

0

0

r

p

m

1

0

0

0

r

p

m

9

0

0

r

p

m

8

0

0

r

p

m

7

0

0

rp

m

600 rpm

500 rpm

400 rpm

3

0

0

r

p

m

2

0

0

r

p

m

Performance Data

b

6

0

b

5

0

b

4

0

b

3

0

b

2

5

b

2

0

bhp

b

1

1

1

.

5

b

b

h

h

p

p

3

b

h

p

7

.

5

1

0

b

b

h

h

p

p

5

Figure 54: 40.2", 9-Blade Fan

3

2

b

h

p

b

h

p

7

5

b

bhp

6

0

b

5

0

b

4

0

b

3

0

b

2

5

b

hp

1

5

7

1

.

5

0

b

h

p

b

h

p

2

0

b

hp

McQuay Catalog 860-9 59

Performance Data

1

b

h

p

1

.

5

b

h

p

2

b

h

p

3

b

h

p

1

5

b

h

p

2

5

b

hp

3

0

bhp

hp

hp

hp

h

p

h

p

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

6.5

7.0

7.5

8.0

8.5

9.0

STATIC PRESSURE (IN. OF WATER)

0.0

5.0

10.0

15.0

20.0

25.0

30.0

35.0

40.0

45.0

50.0

55.0

CFM (IN 1,000's)

McQUAY INTERNATIONAL FAN SELECTION

1

2

0

0

r

p

m

1

3

0

0

r

p

m

1

1

0

0

r

p

m

1

0

0

0

r

p

m

9

0

0

r

p

m

8

0

0

r

p

m

7

0

0

r

p

m

6

0

0

r

p

m

500 rpm

400 rpm

3

0

0

r

p

m

2

0

0

r

p

m

Figure 55: 44.5", 9-Blade Fan

1

0

0

b

7

5

b

6

0

b

5

0

b

4

0

b

2

7

5

b

h

p

1

.

0

5

b

b

h

h

p

p

0

b

hp

60 McQuay Catalog 860-9

Dimensional Data

Evaporator Coil

Motor

Control Panel

Airflow

24"

See Note

18"

or

24"

36"

42"

Rear Side

Front Side

Opposite

Access

Side

Access

Side

NOTE: If water and condenser drains are on the motor side, 24" is required.

Dimensional Data

Recommended Clearances

For good installation, service and maintenance access, follow
the recommended clearances given in this publication.
Minimum clearances required by federal, state and local codes,
such as the NEC, take precedence over the dimensions given.
Clearance is required to allow room for side filter access,
mechanical cleaning of condenser tubes, economizer coil
access to expansion valves and other control components and
allow for possible fan shaft or compressor removal.

Figure 56: Recommended Service and Maintainance Clearances

Table 24: Recommended Minimum Clearances

Location Clearance Length (Inches)

Front 36
Rear 24

Access Side 42

Opposite Access Side 18

Note: For clearance requirements less than those indicated, contact

your local McQuay sales representative.

McQuay Catalog 860-9 61

Dimensional Data

Figure 57: Self-Contained SWP—Front View (Left Hand Access Shown/Optional Plenum)

Table 25: Dimensions (Inche s )

Cabinet and

Unit Sizes

Height

Total Unit

Power and Control Knockouts

Plenum Width
Plenum Depth

Condenser Water

Connections (ODS)

Drain Connections (MPT)

Fan Discharge Opening

Fan and Compressor

Section Depth

Coil Section Depth SD2 36.0 36.0 40.0 40.0 40.0 40.0 40.0

Control Panel Width SW1 14.0 14.0 16.0 16.0 16.0 16.0 16.0

Note: 1 Dimensions do not include lifting lugs, handles, latches or fastener extensions.

2 For shipping dimensions, add 4" to the depth, 8" to the length and 4" to the height.
3 Plenum height is user configurable.
4 Plenum opening height and width requires a minimum of 2" clearance on each side.

Width

Depth

EC1 5.5 5.5 7.5 7.5 7.5 7.5 7.5
EC2 71.0 75.0 87.0 87.0 87.0 103.0 103.0

3, 4

PW

3, 4

PD
WC1 23.0 23.0 25.0 25.0 27.0 27.0 27.0
WC3 74.0 78.0 90.0 90.0 90.0 106.0 106.0
DIA1 2.125 2.625 2.625 3.125 3.125 3.125 4.125
DIA2 2.125 2.625 2.625 3.125 3.125 3.125 4.125

DC1 18.0 18.0 20.0 20.0 20.0 20.0 20.0
DC2 7.0 7.0 7.0 7.0 9.0 9.0 9.0

DOD 32.0 32.0 32.0 32.0 32.0 40.0 40.0

DOL 10.0 10.0 10.0 10.0 10.0 10.0 10.0

DOW 52.0 52.0 68.0 68.0 92.0 92.0 92.0

SD1 44.0 44.0 48.0 48.0 58.0 58.0 66.0

Small Small Tall Medium Large Large Tall

023-033 039-050 044-051 056-066 062-088 065-099 105-130

1, 2
1, 2
1, 2

80.0 84.0 96.0 96.0 96.0 112.0 112.0

84.0 84.0 102.0 102.0 126.0 126.0 126.0

80.0 80.0 88.0 88.0 98.0 98.0 106.0

70.0 70.0 86.0 86.0 110.0 110.0 110.0

44.0 44.0 48.0 48.0 58.0 58.0 66.0

62 McQuay Catalog 860-9

Dimensional Data

Figure 58: Self-Contained SWP Left Side View (Left Hand Access Shown with Piping and Optional Discharge Plenum)

Figure 59: Self-Contained Top View (Left Hand Access Shown/without Discharge Plenum)

McQuay Catalog 860-9 63

Dimensional Data

Airflow

Height

2.0

Figure 60: SWP Discharge Plenum Dimensions

Table 26: Fan Section Dimens io ns

Cabinet Size Width (Inches) Depth (Inches)

Small 70 44

Small Tall 70 44

Depth

Width

Front/Back Elevation

Left/Right Elev ation

Height

2.0

Table 27: Discharge Plenum Heights

Cabinet Size Available Factory-mounted1 Discharge Plenum Heights (Inches)

Small 202428323640——

Small Tall 20 24 28 32 36 — — —

Medium 20 24 — — — — — —

Large 2024——————

Large Tall————————

Available Field-mounted2 Discharge Plenum Heights (Inches)

Small 2024283236404448

Small Tall 20 24 28 32 36 40 44 48

Medium 20 24 28 32 36 40 44 48

Large 2024283236404448

Large Tall 20 24 28 32 36 40 44 48

Note: 1 Maximum shipping height is 120" with a step-deck trailer.

2 Total minimum opening size (sq.ft., (H x L)/144) needs to be greater than or equal to CFM/maximum FPM, maximum FPM = 2500.

Medium 86 48

Large 110 58

Large Tall 110 66

Table 28: Duct Opening Heights

Plenum Height Available Duct Opening Heights (Inches)

20 16———————
24 16 20 — — — — — —
28 16 20 24 — — — — —
32 16 20 24 28 — — — —
36 16 20 24 28 32 — — —
40 16 20 24 28 32 36 — —
44 16 20 24 28 32 36 40 —
48 16 20 24 28 32 36 40 44

Table 29: Left/Right Duct Opening Lengths

Cabinet Size Left/Right Duct Opening Lengths (Inches)

Small 20 24 28 32 36* 40 —

Small Tall 20 24 28 32 36* 40 —

Medium 20 24 28 32 36 40* 44

Large2026344250*54—

Large Tall 20 26 34 42 50 54* 62

Note: *If an opening is 8" narrower than the overall cabinet Depth, the opening will be offset 2" from center.

Table 30: Front/Back Duct Opening Lengths

Cabinet Size Front/Back Duct Opening Lengths (Inches)

Small 18263442505866—————

Small Tall 18 26 34 42 50 58 66 — — — — —

Medium 18 26 34 42 50 58 66 74 82 — — —

Large 1826344250586674829098106

Large Tall 18 26 34 42 50 58 66 74 82 90 98 106

64 McQuay Catalog 860-9

Electrical Data

Table 31: SAFMotor Nameplate Amperage

Horsepower Type

3
5 Premium efficiency 15.7 13.6 6.8 6.8 5.2

7.5
10
15
20
25
30
40
50
60

Premium efficiency 9.3 8.2 4.1 4.1 3.1

Premium efficiency 22.3 20.0 10.0 10.0 7.4
Premium efficiency 29.0 25.8 12.9 12.9 10.3
Premium efficiency 43.4 37.8 18.9 18.9 14.1
Premium efficiency 57.0 49.0 24.5 24.5 18.9
Premium efficiency 70.0 61.0 30.5 30.5 24.2
Premium efficiency 83.3 72.4 36.2 36.2 29.8
Premium efficiency 110.0 96.0 48.0 48.0 38.0
Premium efficiency 137.0 120.0 60.0 60.0 47.5
Premium efficiency 160.0 140.0 70.0 70.0 56.0

Table 32: Compressor Motor Amperage

Electrical Data

208/60/3 230/60/3 400/50/3

FLA FLA FLA FLA FLA

1

460/60/3 575/60/3

Compressor hp Refrigerant

6 R-410A 21.0 182 19.0 164 8.4 75.0 6.8 54
7 R-410A 20.2 182 19.6 164 11.6 100 9.8 78
8 R-410A 23.2 216 22.5 195 11.3 95.0 9.0 80

9 R-410A 26.9 249 25.0 225 12.6 114.0 9.6 80
10 R-410A 30.3 264 28.2 239 14.2 125.0 10.6 80
1 1 R-410A 35.4 271 32.0 245 15.5 125 12.6 100
13 R-410A 40.8 332 38.5 300 18.3 150.0 17.4 109
15 R-410A 49.8 376 48.4 340 18.5 173.0 20.2 132

Supply Power Wiring

1 Units require three-phase power supply.

208V/60Hz/3Ø 230V/60Hz/3Ø 460V/60Hz/3Ø 575V/60Hz/3Ø

RLA LRA RLA LRA RLA LRA RLA LRA

5 Size wires for a maximum of 3% voltage drop.

Lug Size

2 Allowable voltage tolerances:

a 60 Hertz

Nameplate 208 V: Min. 187 V, Max. 229 V
Nameplate 230 V: Min. 207 V, Max. 253 V
Nameplate 460 V: Min. 414 V, Max. 506 V
Nameplate 575 V: Min. 518 V, Max. 632 V

b 50 Hertz

Nameplate 400 V: Min. 342 V, Max. 418 V

3 Power lead wire sizing:

a For units with cooling capability (all concurrent

loads) with or without hot water heating and circuits
with motor loads only:

Table 33: Lug sizes for single disconnect

DIsconnect size Lug size

100 #12-3/0
150 #12-3/0
250 #8-350 MCM
400 (2) #8-600 MCM
600 (2) #8-600 MCM

Table 34: Lug sizes for power block

Power block size Lug size

310 #6- 350 MCM
420 #2- 600 MCM
570 (2) #4-300 MCM

Note: Use copper wire only.

760 (2) #6-500 MCM

MCA = 1.25 (largest motor RLA or FLA) + other
loads

4 Size wires in accordance with Table 310-16 or Table

310-19 of the National Electrical Code.

McQuay Catalog 860-9 65

Unit Weights

Unit Weights

Table 35: Unit and Component Weights for Small and Small Tall Cabinets

Small Cabinet

Component Description

Unit Model Size

023 028 033 039 044 050

Basic Cabinet

1

3587 3637 3651 3994 4008 4008

Cooling Coil Section–Drain Pan Only 1045 1081

Supply Fan/Control Panel Section 1061 993

Condenser/Compressor Section 1480 1530 1544 1920 1934 1934

Condenser Water Weight 29 31 35 44 47 50

Face Load Filter Rack

Rack Only 64 67
2"—MERV 7 15 16
4"—MERV 8 15 16

4"—MERV 11 62 63
4"—MERV 13 62 63
4"—MERV 14 62 63

Evaporator Coils

5 row–12 fpi 372 N/A

Large 5 row–12 fpi N/A 440

Waterside Economizer Coils

Large 4 row–12 fpi 316 371

Water Weight 117 152

Electric Heat

34 kW 20 20

Supply Fan Assembly

13" SWSI 106 N/A
15" SWSI 110 N/A
16" SWSI 122 N/A
18" SWSI 181 181
20" SWSI 195 195
22" SWSI 245 245
24" SWSI 267 267
27" SWSI N/A 395

Supply Fan Motor–ODP

3 HP 76 76
5 HP 88 88

7.5 HP 134 134
10 HP 158 158
15 HP 203 203
20 HP 235 235

Supply Fan Motor–TEFC

3 HP 77 77
5 HP 91 91

7.5 HP 150 150
10 HP 184 184
15 HP 253 253
20 HP 321 321

Variable Frequency Drive

3 HP 14 14
5 HP 14 14

7.5 HP 20 20
10 HP 20 20
15 HP 35 35
20 HP 35 35

Discharge Plenum

32" High without Sound Baffles 268

32" High with Sound Baffles 428

Note: 1 Basic unit consists of a cooling coil section without coils, a supply fan/control panel section without supply fans, supply fan motors or VFD and a

condenser/compressor section.

Small Tall Cabinet

66 McQuay Catalog 860-9

Unit Weights

Table 36: Unit and Component Weights for Medium and Large Cabinets

Medium Cabinet Large Cabinet

Component Description

Basic Cabinet

Cooling Coil Section–Drain Pan Only 1288 1542

Supply Fan/Control Panel Section 1377 1853

Condenser/Compressor Section 2067 2081 2470 2470 2470 2784 3506 3534 3562

Condenser Water Weight 52 55 61 64 68 67 85 88 91

Face Load Filter Rack

Rack Only 95 116
2"—MERV 7 22 27
4"—MERV 8 22 27

4"—MERV 11 91 112
4"—MERV 13 91 113
4"—MERV 14 91 113

Evaporator Coils

Large 5 row–12 fpi 668 776 — — —

Standard 6 row—12 fpi N/A — 776 776 776

Waterside Economizer Coils

Large 4 row–12 fpi 557 654

Water Weight 250 279

Electric Heat

34 kW 20 20
68 kW 40 40

Supply Fan Assembly

18" SWSI 181 N/A
20" SWSI 195 N/A
22" SWSI 245 245
24" SWSI 267 267
27" SWSI 395 395
30" SWSI 434 434
33" SWSI 592 592
36" SWSI 723 723

Supply Fan Motor–ODP

15 HP 203 N/A
20 HP 235 N/A
25 HP 290 290
30 HP 336 336
40 HP 434 434
50 HP N/A 723

Supply Fan Motor–TEFC

15 HP 253 N/A
20 HP 321 N/A
25 HP 354 354
30 HP 416 416
40 HP 538 538
50 HP N/A 612

Variable Frequency Drive

15 HP 35 N/A
20 HP 35 N/A
25 HP 53 53
30 HP 53 53
40 HP 53 53
50 HP N/A 152

Discharge Plenum

32" High without Sound Baffles 320 416

32" High with Sound Baffles 516 680

Note: 1 Basic unit consists of a cooling coil section without coils, a supply fan/control panel section without supply fans, supply fan motors or

VFD and a condenser/compressor section.

1

044 050 056 062 065 062 073 080 088

4733 4747 5136 5136 5136 6179 8507 8563 8619

Unit Model Size

McQuay Catalog 860-9 67

Unit Weights

Table 37: Unit and Componen t Weights for Large Tall Cabinets

Large Tall Cabinet

Component Description

065 073 080 088 099 105 120 130

Basic Cabinet

Cooling Coil Section–Drain Pan Only 1610 1600

Supply Fan/Control Panel Section 2091 2276

Condenser/Compressor Section 2776 3498 3526 3554 3554 4424

Condenser Water Weight 70 85 88 91 102 128 134 141

Face Load Filter Rack

Rack Only 138
2"—MERV 7 32
4"—MERV 8 32

4"—MERV 11 132
4"—MERV 13 132
4"—MERV 14 132

Evaporator Coils

Large 5 row–12 fpi 1054 ———————
Large 6 row–12 fpi — 1054 1054 1054 1054 1054 1054 1054

Waterside Economizer Coils

Large 4 row–12 fpi 879

Water Weight 331

Electric Heat

34 kW 20
68 kW 40

Supply Fan Assembly

24" SWSI 267
27" SWSI 395
30" SWSI 434
33" SWSI 592
36" SWSI 723
40" SWSI 856
44" SWSI 1101

Supply Fan Motor–ODP

25 HP 290
30 HP 336
40 HP 432
50 HP 494
60 HP 675

Supply Fan Motor–TEFC

25 HP 354
30 HP 416
40 HP 538
50 HP 612
60 HP 905

Variable Frequency Drive

25 HP 53
30 HP 53
40 HP 53
50 HP 152
60 HP 152

Discharge Plenum

32" High without Sound Baffles 416

32" High with Sound Baffles 680

Note: 1 Basic unit consists of a cooling coil section without coils, a supply fan/control panel section without supply fans, supply fan motors or VFD and a

condenser/compressor section.

1

6476 7199 7227 7255 7255 8300 8300 8300

Unit Model Size

68 McQuay Catalog 860-9

McQuay Training and Development

Now that you have made an investment in modern, efficient McQuay equipment, its care should be a high prior ity . 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 933-430285Y. T o find your
local McQuay Representative, go to www.mcquay.com.

Aftermarket Services

To find your local parts office, visit www.mcquay.com or call 800-37PARTS (800-377-2787). To find your local service
office, visit www.mcquay.com or call 800-432-1342.

This document contains the most current product information as of this printing. For the most up-to-date product
information, please go to www.mcquay.com.

Products manufactured in an ISO certified facility.

© 2011 McQuay International • www.mcquay.com • 800-432-1342 11/11