McQuay PDAF Installation Manual

®

Installation & Maintenance Data IM 960

Group: PTAC
Part Number: 106862801

Date: December 2008

Applied Packaged Terminal Air Conditioner and Heat Pump

Model PDAF & PDHF Dual Motor Flat Top Unit - 16" x 42"

©2008 McQuay International

Table of Contents

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

Inspection
Nomenclature
Introduction

Dimensional Data

Wall Opening Requirements ..................................7

Wall Construction Types .......................................7

Installation of Subbase

Electric Subbase ....................................................8

Hydronic Subbase .................................................9

Optional Condensate Drain Kit

Installation of Condensate Drain Kit
Installation of Wall Sleeve

Considerations ..................................................... 11

Wall Sleeve Extension for Thick Wall

Construction Types ..............................................11

Installation of Wall Sleeve Extension ..................11

Installation of Louver Frame for Thin

Wall Construction Types .....................................11

Installation of Recessed Louver Wall Sleeve

Installation Requirements for Recessed

Louver Wall Sleeve ............................................12

Anchoring the Wall Sleeve ..................................13

Attaching Cabinet Wall Sleeve to Subbase .........13

Installation of Basic Wall Sleeve

Frame & Brick Wall Construction Type ..............13

Panel Wall Construction Type ....................14 & 15

Attaching Cabinet Wall Sleeve to Subbase .........15

Thick Wall Construction Type .............................16

Attaching Cabinet Wall Sleeve to Subbase .........17

Outdoor Louvers

Typical Louver Design ........................................18

.....................................................................3

...............................................................4

..................................................................5

.......................................................6

......................................8 & 9

....................................9

.....................10

.......................................11

.........12

.............................13

..............................................17 &18

Installation of Louver
Installation of Chassis
Unit Service with ExtendAire Installed

Controls ..............................................................21-32

Standard Digital Touchpad Control Operation ....21

Standard Digital Touchpad Control

Modes of Operation ........................................22-26

Premium (Programmable) Digital

Touchpad Control Operating Instructions ......27-29

Wireless Remote Control (Option) ......................30

Remote Wall Mounted Thermostats ...............30-32

Wiring Diagrams

Remote Thermostat With Secondary Units

Wiring Connections .............................................33

Premium (Programmable)

Digital Control .....................................................34

Standard (Non-programmable)

Digital Control Wiring Diagram ..........................35

Premium (Programmable)

Digital Control Board ..........................................36

Standard (Non-programmable)

Digital Control Board ..........................................37

Premium (Programmable)

Digital Control Board with Standby ....................38

Standard (Non-programmable)

Digital Control Board with Standby ....................39

Scheduled Maintenance
Recommended Spare Parts
Refrigeration Cycle
Faults and Protection Codes for
PDAF/PDHF Control Board
Solid State Digital Controls–LUI Display Codes
Troubleshooting Chart

..............................................18

.........................................18-19

.................20

.................................................33-39

.............................................40

........................................41

...................................................42

......................................42

......42

..........................................43-43

Now that you have made an investment in modern, efcient McQuay® equipment, its care and operation should
be a high priority. For training information on all McQuay HVAC products, please visit us at www.mcquay.com and
click on Training or phone [phone] and ask for the Training Department.

Safety Information

Follow all safety codes. Wear safety glasses and

work gloves. Use a quenching cloth for brazing
operations. Have a re extinguisher available. Follow

all warnings and cautions in these instructions and
attached to the unit. Consult applicable local building
codes and National Electrical Codes (NEC) for special

requirements.

Recognize safety information. When you see a
safety symbol on the unit or in these instructions, be
alert to the potential for personal injury. Understand
the meanings of the words DANGER, WARNING,
and CAUTION. DANGER identies the most serious
hazards that will result in death or severe personal
injury; WARNING means the hazards can result in
death or severe personal injury; CAUTION identies
unsafe practices that can result in personal injury or
product and property damage.

Improper installation, adjustment, service,
maintenance, or use can cause explosion, re,
electrical shock, or other conditions which may result
in personal injury or property damage. This product
must be installed only by personnel with the training,
experience, skills, and applicable licensing that makes
him/her “a qualied professional HVACR installer.”

WARNING

The installer must determine and follow all applicable
codes and regulations. This equipment presents hazards
of electricity, rotating parts, sharp edges, heat and weight.
Failure to read and follow these instructions can result in
property damage, severe personal injury or death. This
equipment must be installed by experienced, trained
personnel only.

DANGER

Hazardous Voltage!
Disconnect all electric power including remote
disconnects before servicing. Failure to
disconnect power before servicing can cause
severe personal injury or death.

CAUTION

Use copper conductors only. Unit terminals are not
designed to accept other types of conductors.
Failure to do so can damage equipment.

Inspection

When the equipment is received all items should
be carefully checked against the bill of lading to be
sure all crates and cartons have been received. All
units should be carefully inspected for damage when
received. If any damage is noticed, the carrier should
make the proper notation on the delivery receipt
acknowledging the damage. The carrier should also
ll out a carrier Inspection Report. The McQuay Inc.
Trafc Department should then be contacted. The unit
nameplate should be checked to make sure the voltage
agrees with the power supply available.

A complete unit consists of the following
components, ordered and shipped separately.

1. Heating/Cooling Chassis and Cabinet or Front
Panel.

2. Wall Sleeve.

3. Outdoor Louver.

4. Subbase – Optional for 208V and 230V units but
mandatory for all 265V.

5. Fixed heater with factory installed power cord.

6. Electrical receptacle – Required for 208V and
230V units, mandatory for all 265V and
Hydronic units.

7. Plug cord cover – Optional for 208V and 230V
units but mandatory for all 265V.

IMPORTANT

This product was carefully packed and thoroughly
inspected before leaving the factory. Responsibility
for its safe delivery was assumed by the carrier upon
acceptance of the shipment. Claims for loss or damage
sustained in transit must therefore be made upon the
carrier as follows:

VISIBLE LOSS OR DAMAGE

Any external evidence of loss or damage must be noted
on the freight bill or carrier’s receipt, and signed by the
carrier’s agent. Failure to adequately describe such
external evidence of loss or damage may result in the
carrier’s refusal to honor a damage claim. The form

required to le such a claim will be supplied by the carrier.

CONCEALED LOSS OR DAMAGE

Concealed loss or damage means loss or damage which
does not become apparent until the product has been
unpacked. The contents may be damaged in transit due
to rough handling even though the carton may not show
external damages. When the damage is discovered upon
unpacking, make a written request for inspection by the

carrier’s agent within fteen (15) days of the delivery

date. File a claim with the carrier since such damage is
the carrier’s responsibility.

IM 960 Applied PTAC / Page 3 of 44

McQuay Model PDAF/PDHF Product Nomenclature

Note: For Illustration purposes only. Not all options available with all models.

Please consult a McQuay Sales Representative for specic availability.

P DAF 1 009 E M R H A B C M A A E

Unit Type

P = PTAC

Product Identier

PDAF = Air conditioner - Flat top
PDHF = Heat pump - Flat top

Design Series

1 = A Design 1

2 = B Design 2
3 = C Design 3
4 = D Design 4

5 = E Design 5

Unit Size

007 = 7,000
009 = 9,000

012 = 12,000
015 = 15,000
017 = 17,000 (Cooling Only)

Voltage

A = 115-60-1
E = 208/230-60-1
J = 265/277-60-1
P = 208/230-60-1 w/stndy 115-60-1

Warranty

A = Standard
E = Extended
X =Special

SKU

A = Stock
B = Build to Order

Upgrade Packages

S = Seacoast

Y = None

Power Connection

L = Long Cord – 72" (Standard)
S - Short Cord – 30" (Optional)

30" Cord, Standard w/Hydronic
Subbase

Y = None

Brand Name

M = McQuay

Refrigerant

R = R22

Heating Type

E = Electric Heat

H = Hydronic

A = Hydronic w/Intermediate Electric
Y = None (PDHF only)

Electric Heat

A = 2.5 Kw
B = 3.5 Kw
C = 5.0 Kw

Y = None

Hydronic Heat Type

T = Steam Subbase (Normally Closed)
J = Hot Water Subbase (Normally Open)

Y = None

Room Interface

Cabinet Type

C = Standard Flat Top 16" x 42"

Controls

Control Board Type

B = Basic Control
P = Premium Controls

(Req'd for Hydronic Heat)

User Interface Type

P = Programmable
N = Non-Programmable

(Unit Mtd. Touchpad)
Y = None (Wall Stat with Blank-off Plate)

Damper Type

Damper Control

A = Automatic (Required for Hydronic Heating Subbase)

M = Manual
Y = None

IM 960 Applied PTAC / Page 4 of 44

Introduction

McQuay offers the most complete line of PTAC
and PTHP products for new construction projects and
exact replacements for our original Singer, Remington,
American Air Filter and American Standard brand
equipment, and models from other manufacturers.

McQuay products feature our proven
institutional grade design and construction that
allows you to benet from the long life, reliability,
and low sound levels, along with higher energy
efciencies for lower operating costs. Plus, McQuay
offers a nationwide network for original equipment
replacements with local parts and service.

McQuay
Conditioners and Heat Pumps are designed and built
for through-the-wall installation in either new or
existing buildings. The self-contained refrigerant
system delivers cooling to the desired space. Heating
can be accomplished with electric resistance, with
hydronic (water or steam), hydronic with intermediate
electric resistance or with reverse cycle technology
(heat pump models only). Generally, an estimate for
capacity selection is 35 BTUH per square foot of oor
space (cooling) and 4 BTUH (1.25 watts) per cubic
foot (heating). The architect or engineer must verify
the selection. Note that the heat pump reverse cycle
generates approximately 10 BTUs per electrical watt
as compared to 3.4 BTUs per watt with resistance
electric heat. The unit will restart at its last setting after

a power interruption.

®

Applied Packaged Terminal Air

Figure 1. Model PDAF/PDHF Unit with Touchpad
Control (Shown with Hydronic Subbase)

Notes:

1. Unit pictured with subbase installed. Subbase is
optional on 208V 230V units Subbase is required
on all 265V and units with hydronic heat. See
pages 8 & 9 for subbase dimensions. Sides are
adjustable.

2. Opening needs to be 165/

"

(422mm) x 425/

8

"

8

(1083mm) when using a louver frame. See page
11, Figure 13.

Figure 2. Exploded View of the Applied PDAF/PDHF Flat Top Unit

IM 960 Applied PTAC / Page 5 of 44

Dimensional Data

Figure 3. Chassis Dimensions

23

5

/

"

32

(145mm)

42" (1067mm)

24" (610mm)

Top View

285/

" (727mm)

8

Fin Width

Front View

Wall Sleeve

1

10

/

" (255mm)

32

Wall Sleeve

1

/

"

21

8

(537mm)

1

16

/

"

64

(407mm)

9

17

/

"

16

(446mm)

Right End View without Wall Sleeve

Figure 4. PDAF/PDHF Cabinet with Wall Sleeve Dimensions

42" (1067mm)

43" (1092mm)

Top View

16"

(406mm)

3

/

"

9

4

(248mm)

3

/

"

13

4

(349mm)

Front View

IM 960 Applied PTAC / Page 6 of 44

1

1

/

" (29mm) Architectural Louver

8

3/8" (10mm) Stamped Louver

Right End View

Wall Opening Requirements

When roughing in the opening for the wall sleeve,
make certain there is sufcient clearance from the
walls and oor. The wall sleeve should be positioned
a minimum of 5/8" in from the room side nished
wall to accommodate the room cabinet. A minimum
distance of 3" above the nished oor is required for

return air.

The rough opening should measure 16

1

/4" wide. When using a louver frame, the opening

42
must measure 16

5

/8" x 425/8". Louver frames should be
used for panel wall and thin wall applications to assure
positive anchoring to the wall (Figure 13). When a
elecrical subbase is used, the opening must start 3"
to 4" above the nished oor (including carpeting) to
match the height of the subbase selected. The subbase
is available in 3" or 4" heights and has adjustable
leveling legs that provide up to an additional 1" height.

A 3" or 4" subbase is required for 265V models and

is optional for 208/230V models.

1

/4" high x

Figure 6. Masonry Wall (Thick) Construction

Wall Sleeve Extension

(See page 11 for

Installation)

Room Side

Splitters

Lintels (by others)

16" x 42"
Wall Sleeve

Figure 7. Frame and Brick Construction

Wall Construction Types

Figure 5. Panel Wall (Thin) Construction

Steel Studs

Concrete

Pillars

1

/

5

/

" x 42

4

" x 42

8

1

/

"

4

5

/

" When using a

8

Floor

16
Wall Sleeve
Rough Opening or
16

Louver Frame

(See page 11 for Installation)

1

16

/

" High

4

1

42

/

" Wide Wall

4

Sleeve Rough Opening

16" x 42"
Wall Sleeve

Lintel

(by others)

IM 960 Applied PTAC / Page 7 of 44

Installation of Subbase

Electric Subbase

An electrical subbase is optional for all 208V and
230V units. A subbase is required for all 265V units.
The subbase is available in 3" (76mm) or 4" (102mm)
heights. The subbase contains leveling legs for
adjustment of up to 1" (25mm) additional height. All
subbases are factory supplied, eld installed options.

1. If the minimum depth subbase is required, discard

the side extension pieces.

2. If more than the minimum depth is required,

determine the depth of the side extension pieces
desired and break at proper score - line. Insert the
extension pieces into the front assembly and
secure with two short black screws at each side.

Figure 8. Electric Subbase

Electrical Knockouts

7/8"

5/8"

3. Insert leveling bolts into subbase bottom ange.
Four (4) bolts will be needed if side extensions are
used. Only two (2) bolts are required if side
extensions are not used.

4. Place the subbase on the oor and align its center
line with the center line of the wall opening. Do
not fasten the subbase to the oor. Attach the
subbase to the wall sleeve using the clips

provided with the subbase.

5. The wiring should be roughed in and the conduit
connected to the subbase junction box. Complete
the installation by wiring the receptacle to the
incoming power supply.

3

/

0" to 9

"

8

3" x 5" (76 to 127mm)

Opening for Electrical

and/or Drain Rough-In

Knockouts for Opitonal

Fuse & Disconnect Switch

3"

5"

21/

"

2

Leveling Screw (4 Places)

Front Elevation (Three Front Panels in Place)

Electrical Junction Box for

Main Power Connection

17"

Receptacle

(Req’d on 265V Units)

Plan

41

3

4

/

"

8

12"

1

/

"

2

1

1

/

"

2

3"or 4"

0" to 1"

Notes:

1. Side Channel Dimensions: Adjustable
from 43/8" to 133/4" (111mm to 349mm)

2. Height: 3" to 4" (76mm to 102mm)
with leveling screws adjustable from 0"
to 1" (0mm to 25m)

3. Subbase is optional on 208V and 230V
units. Subbase is required on all 265V
units and units with hydronic heat.
Subbase extends to front edge of unit
when furnished with hydronic heat.

Hydronic subbase is ush with the front
of the cabinet. Electric subbase is ush

with wall sleeve.

IM 960 Applied PTAC / Page 8 of 44

Plug/Cord Cover

(Req’d on 265V Units)

Installation of Subbase

Hydronic Subbase

A subbase is available as required with all hydronic
units. This subbase measures 8" (203mm) in height
and includes the hydronic heating coil. Refer to IM
Bulletin 936 for installation details. In addition, rough
in supply and return piping.

Figure 9. Hydronic Subbase

Receptacle (Factory installed when

As Req’d

81/

3/4"

1

/

"

2

2

"

4

3" x 5" Opening for Electrical

and/or Piping Rough-in

5/8" O.D. Copper Sweat

15"

fuse & disconnect are furnished)

Top View

Electrical and plumbing rough-in can be done

through the back of the hydronic heat section or

through the openings provided in the bottom of the

subbase. The nished piping can be done now or later.

Fuse

Optional Fuse Disconnect

21/

"

2

63/

1

1

/

"

7

2

"

4

31/

"

4

/

"

1

2

1

/

5

Electrical
Knockout

"

2

1/4" – 1

1

/

"

4

8"

Leveling Legs

End View

3/4"

1

/

"

7

4

Permanent
Mesh Filter

1

41

/

"

2

Front View

Notes:

1. Side channels are adjustable from 0"–93/8" in length by inverting them. Side channels are predrilled to allow

innite adjustment.

2. Subbase shown with louvered front panel removed. Front panel is hinged to allow access to valve, coil, lter &

electrical junction box.

3. Leveling legs are adjustable from 1/4"–11/4".

Optional Condensate Drain Kits

External Drain Kit

Internal Drain Kit

Alternate 6" Long, 1/2" O.D.
Straight Copper Tube

IM 960 Applied PTAC / Page 9 of 44

Installation of Optional
Condensate Drain Kit

Figure 10 illustrates the installation of the indoor
drain kit. The indoor drain kit must be installed before
placing the wall sleeve into the opening. Install as
follows:

1. Locate the drain so that it will be on the room side
of the wall when the wall sleeve is installed.

2. Drill a 1/2" diameter hole in the base of the wall
sleeve for the drain.

3. Drill two (2) 5/32" pilot holes for the mounting
screws. These holes can be located using the drain
kit as a pattern.

4. Assemble the drain kit as shown in Figure 10 and
securely fasten it to the wall sleeve with the
screws provided. Use either the 90o elbow or 6"
straight tting as required.

5. Install the wall sleeve as described on pages

11-16.

Figure 10. Indoor Drain Kit

Assembly of the outdoor drain kit should be completed
after the wall sleeve has been installed.

Note:

When using the outdoor drain kit, the sleeve

must be ush or beyond the outside nished wall (do

not recess).

Install the external drain kit as follows:

1. Assemble the drain kit as shown in Figure 11.

2. Choose the side of the wall sleeve to which the
drain kit is to be installed.

3. There are drain holes and pilot holes provided in
the wall sleeve from factory. Place the drain kit
against the chosen drain hole and fasten securely
with screws provided. Use either the 90o elbow or
6" straight tting as required.

4. Cover the unused drain hole with the block off
plate and gasket supplied with the drain kit.

Contractor To Drill

Three (3) Holes

To Accept Drain Kit

Neoprene Sponge Gasket

Steel Mounting Plate

Figure 11. External Drain Kit

Square Drain Holes

See Detail

Cover

Plate

Room Side

Screws

Detail

Gasket

Tube

Room Side

Cabinet

Bottom

Cover

Plate

1/2"

(13mm)

O.D.

Steel Mounting Plate

Note: Use of 6" straight drain tube will require modication of architectural louver.

IM 960 Applied PTAC / Page 10 of 44

Square Drain Holes

Neoprene Sponge Gasket

1

/

" (13mm) O.D. Drain Tube

2

Alternate 6" Long, 1/2" O.D.
Straight Copper Tube

Installation of Wall Sleeve

Considerations

The wall sleeve is a standard size 16" high, 42"
wide and 13
welded into the sleeve to facilitate easy installation
and removal of the chassis. Each wall sleeve is
predrilled to match the mounting screws of the chassis.
Knockouts are provided for the optional external drain
kit used with the heat pump models.

All necessary fasteners are supplied to assemble the
chassis and the louver to the wall sleeve.

Wall Sleeve Extension for Thick Wall
Construction Types

The standard wall sleeve will accommodate a
maximum wall thickness described in table 1. For
thicker walls, wall sleeve extensions are required and
are available from your local representative. When
it is supplied by the representative, it is treated for
maximum corrosion resistance and matched to exact
size of the standard wall/sleeve. Be sure to provide
air splitters to prevent recirculation of condenser air.
Air splitters should be placed in the wall sleeve as
shown in gure 12. It is important that spacing of the
air splitters match exactly those dimensions shown in
gure 12.

Table 1. Maximum Wall Thickness

Louver Type

Stamped

Architectural

3

/4" deep. Slide channels are factory

Maximum Wall Thickness

10

1

9

Standard
Subbase

/

2

3

/

"(241mm)

"(264mm)

8

Hydronic

Subbase

1

/

13

8

14"(356mm)

No

Subbase

14"(356mm)

7

14

/

"(378mm)

8

"(333mm)

Figure 12. Wall Sleeve Extension

24"

As Required

16"

11

42"

Air Splitters

24"

67/

"

8

1

/

"

8

Room Side

Wall Sleeve Extension

4. Attach indoor drain kit (if used) according to the
instructions on page 10. Outdoor drain kits must
be installed after wall sleeve is in place.

5. Continue wall sleeve installation according to
instruction #4 on page 12.

Installation of Louver Frame for Thin Wall
Construction Types

Louver frames should be used for panel wall and
thin wall applications to assure positive anchoring to
the wall. Recess the wall sleeve so that the louver is
ush with the outside of the building. Place louver
frame around wall sleeve as shown in gure 13. Secure
angles at side and top of walls.

CAUTION

DO NOT drill holes in the bottom of the wall sleeve as it

will cause leaks.

Installation of Wall Sleeve Extension

Wall sleeve extensions are shipped in a separate
carton and tagged to match the proper unit. Be sure to
check tagging of the extension against that of the unit.
Install the wall sleeve extension as follows:

1. Position the extension with standard wall
sleeve so proper alignment with drain and
mounting holes is achieved.

2. Place a bead of caulk around the perimeter of the
wall sleeve and another bead around the mating
side of the wall sleeve extension so that the joint is
watertight. Be sure to use a resilient caulking such
as silicone.

3. Assemble the wall sleeve extension to the wall
sleeve. Clean out weep holes to assure proper

drainage.

Figure 13. Louver Frame Dimensions

3

18

/

16

(1072mm)

423/

"

16

(1072mm)

3

16

/

"

16

33/

"

4

(92mm)

(411mm)

3

/

"

44

16

(1122mm)

Note:Wall Sleeve rough opening when using a Louver

5

Frame must be 16

/8" x 425/8"

IM 960 Applied PTAC / Page 11 of 44

"

Installation of Recessed Louver
Wall Sleeve

Figure 14. Recessed Louver Wall Sleeve Detail

Level the top of the wall

sleeve, NOT the base
of the wall sleeve (see
IMPORTANT notice)

Steel Lintel

93/

"

4

(248mm)

3

13

/

"

4

(349mm)

16"

(406mm)

See Note

Finished

Floor

or Carpet

Room

Cabinet

Wall Receptacle

7

15

/

”(403mm)

8

(by others)

Wall Sleeve

Extends 1/4"

beyond the
exterior face
of the building

Note: Standard subbase is available in 3" or 4"
(76 mm or 102 mm) height. Leveling legs provide
adjustment of 1" (25 mm).

Installation Requirements for Recessed
Louver Wall Sleeve

1. The Recessed Louver Wall Sleeve must extend a
minimum of 11/4" past the nished interior wall.

2. The Recessed Louver Wall Sleeve must be
installed so that it is ush with the exterior face of
the building and the drip edge must extend 1/4"
beyond the face (Figure 14).

Installation of Recessed Louver Wall Sleeve

1. Clean the opening of all debris that may interfere
with installation.

2. If the unit is to be supplied with a subbase, install
subbase before installing wall sleeve (see IM 936).

3. lf the optional drain kit is to be employed (heat
pump only), see IM 942.

(by others)

5/16" (8mm)

Anchor Hole

16"

(406mm)

Drip Edge

Detail

NOTICE

Heat pump models will generate condensate during the
heating season. If it is not desirable for this condensate
to exit outdoors from the wall sleeve drain holes, install
indoor or outdoor drain kits, available from your sales

representative (see page 9 & 10).

4. Place a thin pad of soft mortar on the bottom of
the opening and slide in the wall sleeve.
Louver should be ush to exterior surface when
complete.

Note: The wall sleeve is not intended to replace the
lintel.

IMPORTANT!

Do Not level base of wall sleeve. The bottom of the Recessed

Louver Wall Sleeve has a built in pitch to the outside for
proper drainage. (The inside height dimension is 15.88"
and the outside dimension is 16" to provide the necessary
drainage pitch). Level the wall sleeve using the top or the

inside top surface of the wall sleeve

NOTICE

A Flush Stamped Louver can not be used with a recessed

louver wall sleeve. Louver is special order. Contact
factory for more information if necessary.

5. Level the wall sleeve in both directions, left to

right and inside to outside, using the top of the

wall sleeve and plumb wall sleeve for vertical on

the sides.

6. Secure by anchoring with appropriate fastener(s).
A 5/16" (8mm) hole is provided on each side, 2"

(51 mm) down from the top and 2" (51mm) in
from the rear of the wall sleeve. Additional holes
may be required to rmly secure the wall sleeve
(Figure 15).

CAUTION

DO NOT drill holes in the bottom of the wall sleeve as it

will cause leaks.

IM 960 Applied PTAC / Page 12 of 44

Installation of Basic Wall Sleeve

Anchoring The Wall Sleeve

Anchoring the wall sleeve in the opening is
accomplished as shown in gure 15.

CAUTION

DO NOT drill holes in the bottom of the wall sleeve as it

will cause leaks.

It is recommended that rubber isolation washers be
used with the fasteners to minimize sound transmission
from the equipment to the wall at the point of contact.

Figure 15. Anchoring the Wall Sleeve (all anchoring

hardware eld supplied)

Rubber

Isolation

Washer

Expansion

Anchor Bolt

Do Not Drill Holes in Bottom of

Sleeve
(Except for Internal Drain Kit)

Molly or

Toggle Bolt

Wood

Screw

Cripple Stud

Main Stud

Attaching Cabinet Wall Sleeve to Subbase

1. Where a subbase is used, secure wall sleeve to
subbase with clips provided.

2. Caulk the wall sleeve to the wall opening on both
the inside and outside perimeter. Be careful not
to plug the weep holes. Caulking should be
resilient, nonhardening type such as silicone.

3. Secure the two sections by installing the clip
screws supplied with the hardware bag.

4. Caulk indoor/outdoor perimeter of wall sleeve
with resilient caulk such as silicone.

5. Finish any uncompleted electrical and/or plumbing

connections.

Frame and Brick Wall Construction Type

A heavy-gauge, corrosion resistant wall sleeve
is provided for each unit. The wall sleeve is either
shipped in a separate carton or shipped in a multipack
of 15.

The basic wall sleeve is designed to be easily

installed in a variety of wall constructions. Note: The

center of gravity is 10" (254mm) from the rear face of
the wall sleeve. The wall sleeve must be inserted into
the wall at least 10" (254mm) or other support must
be employed. Support can be from a factory supplied
subbase or from other eld supplied materials.
Recommended installation procedures are described
below (see Figures 16, 17, & 18).

1. Clean the opening of all debris that may interfere
with installation.

2. If the unit is to be supplied with a subbase, install
subbase before installing wall sleeve (see IM 936).

3. lf the optional drain kit is to be employed (heat
pump only), see IM 942.

4. Place a thin pad of soft mortar on the bottom of
the opening and slide in the wall sleeve.
Be sure to recess the wall sleeve enough to

accommodate outside louver. This recess is 3/8"

(9.5mm) for stamped louvers and 11/

" (32mm) for

4

architectural louvers. Louver should be ush to
exterior surface when complete.

Note: The wall sleeve is not intended to replace the
lintel.

5. Level wall sleeve left to right and pitch

1/4" front to back, pitch to the outside. Secure by

anchoring with appropriate fasteners.

A 5/16" (8mm) hole is provided on each side, 2"
(51 mm) down from the top and 2" (51mm) in
from the rear of the wall sleeve. Additional holes
may be required to rmly secure the wall sleeve.
Refer to Anchoring The Wall Sleeve instructions
and gure 15.

CAUTION

DO NOT drill holes in the bottom of the wall sleeve as it

will cause leaks.

6. Where a subbase is used, secure wall sleeve to
subbase with clips provided.

7. Caulk the wall sleeve to the wall opening on both
the inside and outside perimeter. Be careful not
to plug the weep holes. Caulking should be
resilient, nonhardening type such as silicone.

IM 960 Applied PTAC / Page 13 of 44

Installation of Basic Wall Sleeve

Figure 16. Frame and brick with electrical subbase

Steel Lintel
(by others)

Outside

Louver

Mounting

Holes

(by installer)

Caulk Perimeter
both Indoor and

Outdoor Before

Installing Louver

3

/

"

13

4

(349mm)

Wall Sleeve

Power Supply Connect

3

/

"

4

8

(111mm)

16"

(406mm)

Subbase

(Alternate Entry)

9

(248mm)

Room

Cabinet

Leveling

Leg

3

/

"

4

See Note

(406mm)

Finished Floor

of Carpet

Note: Standard subbase is available in 3" or 4"
(76 mm or 102 mm) height. Leveling legs provide
adjustment of 1" (25 mm).

16"

or Top

Figure 18. Frame and brick with hydronic subbase

Steel Lintel
(by others)

3

9

/

"

Outdoor Louver

Mounting

Screws

by Installer

Caulk
Perimeter
both Indoors
and

Outdoors

Before Installing
Louver

Subbase Side

Channel

3

/

"

13

4

(349mm)

Wall Sleeve

16"

(406mm)

Alternate

Electrical

Connections

4

(248mm)

Room

Cabinet

Hydronic Subbase

Leveling Leg

16"

(406mm)

Hydronic
Heating Coil

1

8

(209mm)

Finished Floor
or Carpet

/

"

4

Figure 17. Frame and brick with cord connection

Steel Lintel

(by others)

3

/

"

9

4

(248mm)

Mounting

Screws

by Installer

Outdoor

Louver

Caulk
Perimeter

3

/

"

13

4

(349mm)

Wall Sleeve

16"

(406mm)

Wall
Receptacle

(by others)

(406mm)

Room

Cabinet

3" Min. (76mm)

Finished Floor
or Carpet

16"

Panel Wall Construction Type

For panel wall and thin wall construction, it is
recommended that a louver frame be used (See Louver
Frame Installation For Thin Wall Types on page 11,
and gures 19, 20 & 21).

Panel wall and thin wall construction varies only
slightly from frame and brick construction.

Note: The center of gravity is 10" (260mm) from the
rear face of the wall sleeve. The wall sleeve must be
inserted into the wall at least 10" (260mm) or other
support must be employed.

Support can be from a factory supplied subbase or
from other eld supplied materials. Installation for this
application is as follows (Figures 19, 20, & 21).

1. Clean the opening of all debris that may interfere
with installation.

2. If the unit is to be supplied with a subbase, install
subbase before installing wall sleeve (see IM 936).

3. If the optional drain kit is to be employed, see IM

942.

4. Be sure the wall sleeve is mechanically attached
to the wall and caulked to assure a proper seat. It
is recommended that the louver frame be used for

this purpose.

IM 960 Applied PTAC / Page 14 of 44

Installation of Basic Wall Sleeve

5. Recess the wall sleeve so that the louver is ush
with the exterior of the building.

6. Level wall sleeve in both directions and secure
by anchoring with appropriate fasteners or drill
additional holes as required to secure rmly. Refer

to Anchoring The Wall Sleeve instructions on

page 13.

CAUTION

DO NOT drill holes in the bottom of the wall sleeve as it

will cause leaks.

7. Where a subbase is used, secure wall sleeve to
subbase with clips provided.

8. Caulk the wall sleeve to the wall opening on both

the inside and outside perimeter. Be careful not to

plug the weep holes. Caulking should be resilient,
nonhardening type such as silicone.

Figure 19. Panel wall construction with standard
electrical subbase

Louver Frame

(see page 11 for details)

93/

"

4

16"

(406mm)

See Note

(248mm)

Wall Sleeve

(349mm)

16"

Room

Cabinet

Power Supply Connect

(Alternate Entry)

(406mm)

Electrical
Subbase

Floor

3

13

/

"

4

Subbase Side Channel

Outside

Louver

Gasket
& Caulk
Perimeter

3. Secure the two sections by installing the clip
screws supplied with the hardware bag.

4. Caulk indoor/outdoor perimeter of wall sleeve
with resilient caulk such as silicone.

5. Finish any uncompleted electrical and/or plumbing

connections.

Figure 20. Panel wall construction with cord connection

16"

(406mm)

3"Min. (76mm)

Floor

Receptacle

(by others)

3

9

/

"

4

(248mm)

Room

Cabinet

Louver Frame

(see page 11 for details)

3

13

/

"

4

(349mm)

16"

(406mm)

Wall Sleeve

Conduit

Minimum

2 Supports
(eld supplied)

Outside

Louver

Caulk
Perimeter
both Indoors

& Outdoors

Figure 21. Panel wall installation with hydronic subbase

Louver Frame

(see page 11 for details)

3

/

"

9

16"

(406mm)

4

(248mm)

Room

Cabinet

(349mm)

16"

(406mm)

13

3

/

"

4

Outside

Louver

Note: Standard subbase is available in 3" or 4"
(76 mm or 102 mm) height. Leveling legs provide
adjustment of 1" (25 mm).

Attaching Wall Sleeve to Subbase

1. Where a subbase is used, secure wall sleeve to
subbase with clips provided.

2. Caulk the wall sleeve to the wall opening on both
the inside and outside perimeter. Be careful not to
plug the weep holes. Caulking should be resilient,
nonhardening type such as silicone.

Hydronic

Heating

Coil

1

8

/

"

4

(209mm)

Power Supply Connect

(Alternate Entry)

Leveling Legs with 1" Adjustment

IM 960 Applied PTAC / Page 15 of 44

Wall Sleeve

Subbase

Side

Channel

Caulk
Perimeter
both Indoors

& Outdoors

Installation of Basic Wall Sleeve

Thick Wall Construction Type

Installation of wall sleeves for thick walls requires
special consideration. Table 2 should be used to
determine the maximum wall thickness allowed for the
basic wall sleeve. For thicker walls, wall sleeve exten­sions are available from your representative (see page
11 for details).

Wall sleeve installation in thick walls is similar to
frame and brick installation. Install as follows (Figure
22, 23, & 24).

1. Clean the opening of all debris that may interfere

with installation.

2. If the unit is to be supplied with a subbase, install

subbase before installing wall sleeve see IM 936.

3. If the optional drain kit is to be employed (heat

pump only) see IM 942.

4. If wall thickness exceeds dimensions shown in

Table 2, a wall sleeve extension must be used.
Once the extension is attached to the wall sleeve,
place a thin pad of soft mortar on the bottom of
the opening and slide in the wall sleeve/extension
assembly. Be sure to recess the wall sleeve enough

to accommodate outside louver. This recess is 3/8"

(9.5mm) for stamped louvers and 1
architectural louvers. Louver should be ush to

exterior surface when completed. Note: The wall

sleeve is not intended to replace the lintel.

5. Level wall sleeve in both directions and secure

by anchoring with appropriate fasteners or drill
additional holes as required to secure rmly. Refer

to Anchoring The Wall Sleeve instructions on

page 13.

CAUTION

DO NOT drill holes in the bottom of the wall sleeve as it

will cause leaks.

1

/4" (32mm) for

Figure 22. Thick wall construction with electrical
subbase

See Table 2

Steel Lintel
(by others)

3

4

/

3

/4”

16"

(406mm)

" Min. (111mm)

8

93/

"

4

(248mm)

Room

Cabinet

See Note 1

Floor

16"

(406mm)

Caulk

Perimeter

Mounting

Screws

(by installer)

Outside

Louver

See

Note

2

Wall

Sleeve

Extension

13

(349mm)

Electrical

Subbase

Notes:

1. Standard subbase is available in 3" or 4" (76
mm or 102 mm) height. Leveling legs provide
adjustment of 1" (25 mm).

2. Wall sleeve extension is available in various
depths and supplied as required.

Figure 23. Thick wall construction with cord connection

See

Table 2

Caulk

Perimeter

1/8"(3mm) Min.

Steel Lintel

(by others)

6. Where a subbase is used, secure wall sleeve to
subbase with clips provided.

7. Caulk the wall sleeve to the wall opening on both
the inside and outside perimeter. Be careful not
to plug the weep holes. Caulking should be
resilient, nonhardening type such as silicone.

Table 2. Maximum Wall Thickness

Maximum Wall Thickness

Louver Type

Stamped

Architectural

No

Subbase

14"(356mm)

7

14

/

"(378mm)

8

IM 960 Applied PTAC / Page 16 of 44

10

1

9

3

Standard
Subbase

/

2

/

"(241mm)

"(264mm)

8

Hydronic
Subbase

1

13

/

"(333mm)

8

14"(356mm)

Outside

Louver

Mounting

Screws

(by installer)

13

(349mm)

Wall

Sleeve

Wall

Sleeve

Extension

3

/

"

4

16"

(406mm)

3

/

"

9

4

(248mm)

16"

(406mm)

Room

Cabinet

3"Min. (76mm)

Floor

Receptacle (by others)

Installation of Basic Wall Sleeve

Figure 24. Thick wall installation with hydronic subbase

See Table 2,

page 16

Caulk

Perimeter

Mounting

Screws

(by installer)

Outside

Louver

Wall Sleeve

3

/

13

4

(349mm)

Wall

Sleeve

Extension

"

16"

(406mm)

Steel Lintel

(by others)

1" (25mm)

3

9

/

"

4

(248mm)

Room

Cabinet

Hydronic

Heating

Coil

Hydronic

Subbase

16"

(406mm)

81/

"

4

(209mm)

Floor

Figure 25. Flush Stamped Louver

Figure 26. Architectural Louver

Louvers by others are acceptable as long as
they meet factory specications. They must have a
minimum free area of 70% or a pressure drop not
exceeding .05 in. w.g. at 300 fpm face velocity and
a blade design that will not cause recirculation of
condenser air.

Attaching Wall Sleeve to Subbase

1. Where a subbase is used, secure wall sleeve to
subbase with clips provided.

2. Caulk the wall sleeve to the wall opening on both
the inside and outside perimeter. Be careful not
to plug the weep holes. Caulking should be
resilient, nonhardening type such as silicone.

3. Secure the two sections by installing the clip
screws supplied with the hardware bag.

4. Caulk indoor/outdoor perimeter of wall sleeve
with resilient caulk such as silicone.

5. Finish any uncompleted electrical and/or plumbing

connections.

Outdoor Louvers

Two styles of exterior louvers are available. The
ush stamped louver is a one-piece stamped aluminum
type that is nished natural and clear anodized (Figure

25). Attractive, rugged architectural louvers (Figure

26) are extruded aluminum and are nished natural
and clear anodized (optional colors are also available).

A Flush Stamped Louver cannot be used with

Note:

a recessed louver wall sleeve. Recessed Louver is
special order. Contact factory for more information if
necessary.

Free area is dened by ASHRAE as the minimum
area of the openings in an air inlet or outlet through
which air can pass. Have your local McQuay
representative evaluate the application of special
louvers or building facade treatments that may
affect normal operation of the unit or restrict free
air discharge of condenser airow. A louver design
that restricts the passage of condenser air or causes
condenser air to be recirculated can dramatically
alter the performance of the unit. Unit capacity and
efciency may be decreased and fan motor and
compressor life can be shortened.

If the louver does not meet the requirements set
out above or it is only marginally acceptable, then
a drawing will be required for factory evaluation. If
acceptance cannot be determined by the drawing, then
a sample of the proposed louver must be sent to the
factory for testing and certication. The sample sent
for testing must be at least 16" high by 42" wide.

IM 960 Applied PTAC / Page 17 of 44

Typical Louver Design

Figure 27 illustrates some typical louver designs.

The “X” dimension represents the narrowest
dimension through which air must pass. The “Y”
dimension represents the increment of rise between the
blades. To calculate the percentage of free area, divide
dimension “X” by dimension “Y” (see Example).

Figure 27. Louver Designs

Example:
Free Area % = YX x 100

Where X = .7

Y = 1.0

Free Area % = 1.07 x 100 = 70%

IMPORTANT!

Air ow required for PTAC units must not be restricted

by exterior plants or walls. Plants or shrubs must not
be planted in close proximity to the outside grille of the
PTAC unit. Vegetation planted too close to grilles will
cause discharge air to be recirculated, thereby increasing
electrical consumption. Warranty will be voided if it
is determined that the compressor life is shortened
from overheating due to close proximity of outside
obstructions.

Note: Discharge air restrictions include, but are not
limited to:

• Vegetation

• Concrete walls or barriers

• Overhangs that do not allow discharge air to rise

• Installation of bug screen of any kind

Installation of Louver

1 Remove louver and mounting hardware from the
shipping carton.
2 Remove temporary cardboard weather panel from
wall sleeve.

3. Make a temporary handle by looping a piece of
exible wire or heavy cord through the louver.
This enables the installer to keep a rm grasp on
the louver when installing from inside the room.

4. Angle the louver through the opening at the rear of
the wall box, then pull the louver back to the wall
sleeve ange so that the louver studs pass through
the holes in the ange.

5. Attach washers and nuts and secure louver in
place.

6. If the heating/cooling chassis is not to be
immediately installed, replace the weather panel.

Installation of Chassis

Proper installation of the heating/cooling chassis
is extremely important to the proper operation of the
unit. Whether the wall sleeve has been separately
shipped or shipped with the chassis, proper installation
is as follows:

WARNING

The chassis weighs approximately 150 lbs. Use blocking

and lifting devices. Do not raise over any body parts.

1. Remove shipping carton and inspect for any
shipping damage. Report any found to the carrier.

2. Save shipping carton to cover installed conditioner
until construction is complete.

3. Check nameplate data on chassis to insure that the
correct job site distribution has been made with
respect to heating/cooling capacities. Generally,
corner rooms require larger capacities.

WARNING

Improper electrical supply can cause property damage,
severe personal injury or death.

4. Set front panel and air lter aside.

5. Remove chassis from carton by pulling evenly on
substantial portion of unit.

CAUTION

Do not lift by pulling on the tubing. Tubing can crack or
bend damaging the unit.

IM 960 Applied PTAC / Page 18 of 44

6. If wall sleeve has been previously installed,
remove temporary cardboard weather panel.

7 If louver has been previously installed, remove

temporary cardboard weather panel.

8 Place Tinnerman clips on wall sleeve. Clips and

mounting screws enclosed in a bag attached to the
inside chassis side panel (Figure 28).

9. Rotate fans to be sure they are free of obstruction.

10. Check all fasteners to make certain they did not
loosen during shipment. Do not loosen nuts
holding down compressor; they are factory
installed.

11. Do not lubricate motors before start-up. Motors
are permanently lubricated by the manufacturer.

12. Check all copper tubing and capillaries for proper
clearance so they will not hit or rub during

operation.

13. When installing the chassis in older wall sleeves,
it may be necessary to bend the sheet metal ange
at the rear of the wall sleeve rails to allow full
insertion of the chassis.

14 Slide chassis into wall sleeve until rmly seated

against weather seals.

Note: If weather seals are old or in bad condition,

replace to make a proper seal.

Make sure tubing does not catch when inserting

chassis.

CAUTION

Do not push on the coil surface, control box cover or fan
scroll.

15. Secure the chassis in the wall sleeve with four (4)

screws packaged with the Tinnerman clips

(Figure 28).

16. Plug electrical cord into receptacle. Excess cord
for 208V and 230V units should be coiled neatly
and stored in the conditioner. Attach plug/cord
cover to front face of subbase on 265V.

17. Set the manual damper operator in open or closed
position as desired. On units equipped with the
optional automatic fresh air damper, the damper is
factory set to open whenever the fan motor is
running and closed when it is off.

18. Set the indoor fan mode for off cycle on the PC
board for the off cycle selection of 10, 20, 30
minutes or 1 hour off cycle time. The fan will
operate for 2 minutes and shut down for the
selected off cycle period. For continuous fan
operation, the fan mode selection on the touchpad
or remote thermostat must be set to continuous or
on. When the room thermostat is in the cycle or
auto mode, it will cycle the indoor fan when there
is a call for heating or cooling. See page 34 & 35
for jumper placement details.

19. Set the temperature limiting feature to the desired
range of thermostat operations. As shipped, the
range is 60°F to 85°F.

20. Replace the air lter and front panel.

21. For hydronic units:

a. Route the two low voltage valve wires, with
Molex connection, through the opening
provided in the subbase and connect to valve.
b. Connect short power cord from the chassis to
the receptacle in the subbase heat section.
c. Relocate thermostat bulb to bracket located in
the subbase. Refer to IM 936 which is
provided with the hydronic subbase.
d. Replace lter and louvered subbase front
panel.

Figure 28. Chassis Installation (Slope Top Unit Shown)

Wall Sleeve

Left end view

Damper & Damper Actuator

Chassis

Tinnerman Clips

Wall Sleeve Rails
(See Note 21 Above)

Screws (4)

IM 960 Applied PTAC / Page 19 of 44

Unit Service with ExtendAire Installed

Figure 29. Unit with ExtendAire

ExtendAire™ Kit

The ExtendAire plenum system is internally
lined with 1/4" (6mm) berboard, 6 lb. (13.2 kg)
density to prevent condensation on the exterior
surface. It is factory painted Antique Ivory,
matching the nish of the basic cabinet. Each
extension section is furnished in two pieces such
that the rear half can be fastened to the wall
and the front half then snapped in place without
the use of screws or tools. Duct cross-sectional
dimension is 4½" x 7½". The installer can select
the number of active grilles in the primary
discharge section that will provide diversion of
the specied percentage of air to the adjoining
room outlet.
The percent air diverted can be adjusted from 24%
to 50% as outlined in the selection table.

Refer to Figure 30 for disassembly of ExtendAire.

1. Disconnect power from unit.

2. Remove end cap from ExtendAire primary
discharge section (A).

3. Remove cabinet front panel by lifting straight up
until panel clears cabinet side rails (B).

4. Remove touchpad control by releasing friction
clips located on the underside of the touchpad (C).

5. Remove communication cord from bottom of
touchpad (D).

6. Remove two (2) discharge grilles from the top of
the ExtendAire primary section (E).

7. Loosen the two (2) "T" bar upper and lower hold
down clamps and turn 90 degrees (F).

8. Remove ExtendAire primary discharge section by
GENTLY using a small screwdriver to pry it loose
at the connection “dimples” between the primary
and extension section (G).

9. Remove the (4) chassis to wall sleeve retaining
screws, (2) on each side.

10. Remove cabinet retaining screws from the side
panels.

11. Slide chassis forward approximately 4" and
remove or loosen the (5) cabinet retaining screws
on the top of the chassis.

12. Remove cabinet from chassis by lifting straight up.

13. Slide chassis out of wall sleeve.

14. Install in reverse order.

Figure 30. Typical ExtendAire Assembly

IM 960 Applied PTAC / Page 20 of 44

Controls (Non-programmable)

Standard Digital Touchpad Control

Figure 31. Standard Digital Touchpad Control

Application

The PTAC Digital Control is used to control
a PTAC Unit that includes both an integral air
conditioner and a source of heat.

The Digital Control is operated with a Touchpad.

Inputs and Outputs

• Indoor coil sensor, (ICS)

• Outdoor coil sensor, (OCS)

• Indoor air sensor, (IAS)

• Outdoor air sensor, (OAS)

• Remote T’stat, T’STAT (RCWYBG)

• Power supply: (24VAC)

• Line voltage input, (L1, L2)

• Indoor fan standby voltage, (L1STB L2STB)

• Control selection: (LUI, T’STAT

• Model selection: (AC/E, HP, HP/E)

• Time delay bypass, (TEST)

• Indoor off fan cycle: (FAN, OFF CYCLE–10, 20,
30, 1 HR)

Outputs

• Compressor output, COM

• Indoor fan, BLOWER LO, HI

• Outdoor fan, OUTDOOR FAN

• Electric heater, ELE

• Reversing valve, REV VALVE

Figure 32. Standard Digital Control Indicators

LED

2-Digit Display

9- LED

Indicators

7- Push Buttons

User Interface

The user will by default control the Electronic
Controller via the touchpad. The user can select with a
jumper for the unit to receive commands from a Remote
Thermostat.

Keys and Indicators Labels

ON/OFF, FAN SPEED, MODE

7 Push Buttons FAN MODE, SLEEP

Temp buttons: for
Temp UP and for Temp DOWN

9 LED Indicators SLEEP, COOL, COOL/DRY, FAN,
HEAT, HIGH, LOW, CYCLE, CONT.

LED 2 Digit Displays No Label

Display Function Legend

Tr = Room Temperature
hI = High Room Temperature
Lo = Low Room Temperature
LA = Low Ambient Lockout
rT = Remote Thermostat Control
tP = Touchpad Control
t = Time

Ts = Temperature Setpoint

Rf = Room Freeze Condition
CF = Coil Freeze Protection
F = Fahrenheit
C = Celsius
LC = Control Lockout Mode

Remote Thermostat Control

The Remote Thermostat can be any thermostat
that can interface with an electronic thermostat via
RCWYBG terminals. The Control Selection jumper
must be in T’STAT position. During a call the remote
thermostat will pass R back to the controller on a
respective terminal. The push buttons on the touchpad
become inactive in the remote thermostat mode.
However, the control pad LED display will indicate

the mode of operation, and the room temperature.

IM 960 Applied PTAC / Page 21 of 44

Controls

Standard Digital Touchpad Control

Operation

Memory Recall

The digital control shall start with the last settings
used prior to power down. These settings are saved in a
non-volatile memory. Factory set mode is OFF.

On/Off Triggering

Control can be turned On/Off via LUI, Remote
T’stat, or Sleep feature. The control will show the
temperature set point when the mode is Cool, Cool
Dry, or Heat. The display will be blank in Fan mode.

On/Off triggering with LUI

1.

Control shall turn On or Off when the On/Off
button is pressed in LUI. Once turned on control
shall start on the last mode used before it was
turned Off.

2. On/Off triggering with the Remote T’stat

Control shall be turned On if it was Off from the
Remote T’stat when it is set up to be controlled by
a Remote T’stat. A call for heat or cool from the
Remote T’stat will be used to turn the control on.
Control remains on until manually turned Off.

3. On/Off triggering with the Sleep feature

Sleep feature works in combination with the Timer
setting. Sleep time setting shall be user adjustable
from 1 to 15 hours via the Touchpad. The timer
will count down and when it reaches “0” it will
turn the control Off if control was previously On
and vice versa, if it was Off it will turn On after

time expires. As mentioned in protections section

of this spec the Sleep operation is overridden by
room freeze protection.

Control Off

When the control is in the Off Mode, relay outputs
will be disabled with the exception of the indoor

fan (blower). It will stay on to meet the Hot Keep

specication. Indicator LED’s are all off.

Indoor and Outdoor Fan Operation

The indoor fan can be set to operate on High
or Low speed with the Fan Speed Button on the
touchpad. It can also be set for Continuous or Cycle
operation on the touchpad. When set for Continuous,
the “CONT” LED will be on and the fan will run
continuously. When set for Cycle, the “CYCLE” LED
will be on and the fan will turn on at a call for heat or
cooling.

Fan Cycle Operation:

On a call for Heating or Cooling, the indoor fan
and the heating source or the compressor will be
activated. When the call is satised and the heating
source or the compressor is deactivated, the indoor fan
will repeatedly run for 2 minutes on and the number
of minutes selected on the PC Board off, until the next
cut-in cycle. The number of cycles with timing as
described above is determined based on the OFF FAN
CYCLE jumper setting.

Remote T’Stat Mode

The unit can be jumper congured to take
commands from a Remote Thermostat. The Remote
Thermostat will call for Heat and Cool through the
electronic controller.

1. The Remote T’stat will control through the board
the work of the compressor, indoor and outdoor
fans, the reversing valve, and the heater

2. System will run in Cool mode when Y signal is
high. In cool mode compressor (therefore
outdoor fan) shall turn on

3. Cold start feature (see Modes of Operation – Cold
Start), Cool dry mode (see Cold Dry Mode) and
Sleep feature (see Sleep Feature) are not available
in Remote T’stat cool mode

Temperature Range

The maximum operating temperature range is
selectable via the Touchpad and is 60°F to 85°F, with
the limits included. The Remote Thermostat selectable
operating range is 60°F to 90°F with limits included.
The range is set in the Set-up menu.

IM 960 Applied PTAC / Page 22 of 44

Controls

Standard Digital Touchpad Control

System Select Operation Using Remote
Thermostat

System will run in Heat mode and engage certain
outputs based on the system selection (jumper) as
described below (see Standard Digital Control Board
Wiring Diagram on page 35).

AC/ELE

• If AC/ELE is selected then a signal on W
terminal will call for heating.

HP or HP/ELE

• If HP or HP/ELE is selected then signals on Y
and B terminals will call for heating.

Notes:

1. Hot start and Sleep features are not available in
Remote T’stat heat mode.

2. Control’s operation is subject to its own protection
features when controlled by a remote thermostat.

3. Indoor fan mode and the speed will default to
“cycle” and “high” when unit is controlled by
remote thermostat.

4. The indoor fan is turned on when G signal is high.
When there is no signal on G terminal then the
indoor fan will be turned off.

Control Lockout Feature

The control is placed in a lockout mode of
operation when Mode button is held pressed for 10
seconds. Display will show “LC” to conrm Lockout
Mode has been entered. Once in this Lockout Mode
the control board will not take any commands at all. In
Lockout, unit will continue to operate with the settings
just prior to Lockout Mode. This means the touchpad
will no longer be able to pass commands to the
control. User’s set point will normally be displayed.
Any button pushed will bring “LC” on display for ve
seconds.

To exit the Lockout Mode and return to normal
(regular) mode of operation, press the Mode button for
10 seconds. Display will show “nL” for ve seconds to
conrm normal mode has been resumed.

Modes of Operation

Cool Mode

In Cool Mode, the compressor will start if the
temperature at the space temperature sensor is 1°F
or higher than the set point. It will stop if the space
temperature sensor is 2°F or lower than the set point,
subject to timing requirements.

In the Cool Mode, the indoor fan will operate
according to the user settings for Fan Mode –
Continuous or Cycle and Speed.

Cold Start

Cold start is initiated when the control has not
called for cooling for more than two (2) hours or
during a power-on-reset. During cold start, the set

point is lowered by 4°F (Tset-4°F) if the differential
calls for cooling. The unit will operate in cold start
until the new set point is satised (+ or – 1°F) or until
the unit has run in cold start for at least 20 minutes.
After one or both conditions are met, the set point will
be reset to the user setting and the unit will run in the
regular cool mode.

The indoor fan will operate according to the user
settings for mode – Continuous or Cycle and Speed.

Cold start is not available with the Sleep feature.

Sleep Function

Sleep time is adjustable by the user from 1 to 15
hours in one (1) hour increments in a closed loop. The
sleep time is adjusted and set via the touchpad and by
pressing the Sleep Button repeatedly. On the touchpad,
the display will show the set time in numbers for ve
(5) seconds. Before the sleep time expires, the setting
can be adjusted above the number of hours passed by
pressing the Sleep Button. Pressing the On/Off Button
can terminate the Sleep Mode.

A changeover from Heat to Cool or another Mode
will reset the Sleep Timer.

The Sleep Function will be deactivated by pressing
the power-on-reset or any button (except sleep) on the
touchpad or the Remote Control.

IM 960 Applied PTAC / Page 23 of 44

Compressor

Low Fan

t

On

Off

On

Off

8 mins.

4 mins.

t

Compressor

Low Fan

12 mins.

On

Off

On

Off

*

t

t

Compressor

Low Fan

t

On

Off

On

Off

30 secs.

30 secs.

6 mins.

6 mins.

t

*

Compressor

Fan

t

On

Off

On

Off

t

12 mins.

*

Cool Dry Mode

Select the Cool Dry Mode when the standard Cool
Mode does not provide sufcient dehumidication. In
Cool Dry Mode, the unit must run in Cool Mode for 12
minutes or until the temperature differential between
the room temperature and the set point is less than
2°F. This will also occur after a Cold Start or a Mode
change from Cool to Cool Dry. During this time, the
fan will operate in the Mode and Speed selected.

Until one or both of the above conditions are met,
the control will determine which Dry Mode (Zone) is
initiated based on the temperature differential between
the room temperature (Tr) and the temperature set
point (Ts):

Figure 35. Zone C

Note: Cool Dry is not available with Sleep Function.

Figure 33. if Tr - Ts > 4°F, operation will be in Zone A
Figure 34. if 2°F < Tr - Ts < 4°F, operation will be in
Zone B
Figure 35. if 0°F < Ts - Ts < 2°F, operation will be in
Zone C
Figure 36. if Ts - Tr > 5°F, operation will be in Zone D
The other temperature ranges are dead bands for zone
stability.

Figure 33. Zone A

Figure 34. Zone B

IM 960 Applied PTAC / Page 24 of 44

Figure 36. Zone D

Modes of Operation-Description

Standard Digital Touchpad Control

Heat Mode

Unit will call for heating based on the type of
the heat source it has: heat pump in reverse cycle or
electric.

1) Hot Start:

Hot Start is possible when the control has not
called for heat in more than (2) hours or during power­on-reset. During Hot Start, the user’s set point is raised
4°F (Ts + 4°F). The unit will only call for heat if room
temperature differential calls for heat.
The unit will continue in Hot Start Mode until the
new set point is satised (with a 1°F differential)
or unit has run for at least 20 minutes. After one or
both conditions are met, the set point will be reset
to the user’s setting and the unit will run in regular

heat mode. Hot start is not available with the Sleep

feature. The fan will operate per the Fan Mode and
Speed setting.

PRELIMINARY

2) Hot Keep:

When the water valve closes, the indoor fan will
operate per the user mode (Constant or Cycle) and

speed setting.

3) Sleep Function:

Sleep time is user adjustable from 1 to 15 hours in
one hour increments, in a closed loop via the touch

pad, by pressing the Sleep button repeatedly. The

Sleep Mode can be terminated by pressing the
On/Off button.

The Sleep Function will lower the temperature
setting with time. Changing the Mode or a changeover
from Heat to Cool will reset the Sleep Timer.

The Sleep function will be deactivated by Power­on-reset, or by pressing any button on the Touchpad
except Sleep.

4) Fan Mode:

In the Fan Mode, the fan will operate continuously
at the user’s speed setting. The compressor and
outdoor fan will not operate. In single motor units,
the outdoor fan will run along with the indoor fan.

Set Up Mode

To enter the Set Up Mode, simultaneously press the
Mode, Up and Down buttons for 5 seconds. To change
settings, press the Up or Down button. To move from
one screen to another, press the Mode button.

To exit Set Up, press the Mode Up and Down
buttons simultaneously for 5 seconds or control will
automatically exit Set Up in 15 seconds.

Settings within the Set Up Mode are as follows:

Control Selection:

To view the Control Selection Screen, press and
hold the Up and Down buttons for 5 seconds. The
setting may be changed by pressing either the Up or
Down button. The “tP” setting is the default setting
and indicates the touchpad control.

Hydronic Valve Operation

To advance from Temperature Limit Settings to
Hydronic Valve operation, press the Mode button
once. To toggle the setting, press either the Up or
Down button. Settings are “no” (normally open) and
“nc” (normally closed). Default setting is “no”.

Fresh Air Damper Control

The Fresh Air Damper will operate when the
following conditions are met:

A. Damper setting in the touchpad set-up mode is
“AU” (automatic) AND

B. Indoor fan motor turns on AND

C. Outdoor Air Sensor (OAS) temperature is
greater than 40ºF but less than 90ºF AND

D. Indoor Air Sensor (IAS) temperature greater
than 50ºF.

This control can be overridden by changing the
damper setting in the set-up mode to “CL” (Close).

Indoor Air Quality Boost Fan

The IAQ Boost Fan will operate in conjunction
with the Fresh Air Damper and increase the volume of
fresh air to 90 CFM. The Fresh Air Damper and Boost
Fan will operate when the following conditions are met:

A. Damper setting in the touchpad set-up mode
is “AU” (automatic) AND

B. Indoor fan motor turns on AND

C. Outdoor Air Sensor (OAS) temperature is
greater than 40°F but less than 90°F AND

D. Indoor Air Sensor (IAS) temperature greater
than 50°F.

This control can be overridden, close the damper
and turn off the Boost Fan by changing the damper
setting in the Set-up Mode to “CL” (Close).

Temperature Limit Settings

To advance from Control Selection to Temperature
Limit Settings, press the Mode button once. To set the
Cool Minimum set point, press and hold Fan Cycle
button and adjust the setting with the Up or Down

buttons. The minimum setting is 60°F.

To set the Heat Maximum set point, press and hold
Fan Speed button and adjust the setting with the Up or

Down buttons. Maximum setting is 85°F.

The Display will show the upper operating limits
rst. The default settings are Cool min. = 60°F and
Heat max. = 85°F.

IM 960 Applied PTAC / Page 25 of 44

Modes of Operation

Standard Digital Touchpad Control
Indoor Air Sensor Reading

To advance from Hydronic Valve operation to Indoor
Air Sensor Reading, press the Mode Button once. The
control readout will show room temperature.

Figure 37. Indoor Air and Indoor Coil Sensor Locations

Indoor

Coil Sensor (ICS)

Indoor

Air Sensor (IAS)

Outdoor Air Sensor Reading

To advance from Indoor Coil Sensor reading to
Outdoor Air Sensor reading, press the Mode button
once. The control readout will show the outdoor air

sensor temperature.

Figure 38. Outdoor Air Sensor Location

Outdoor Air Sensor

(OAS)

Thermistor Failure Code and Condition

The system treats a sensor open or short as
extremely cold or hot and reacts accordingly. The
exception is the room air sensor, in which case the
system will turn off. When the fault is corrected by
replacement or repair, the respective error code will
clear from the display (Table 1).

Compressor Random Restart

When power is interrupted, a random compressor restart
delay of 0 to 2 minutes is initiated. In the Cool Mode
only, the compressor will start operating only after the
random delay plus 2 minutes (minimum off time for
thermostat 2 to 4 minutes). Random delay is used only

during system startup or reset.

Unit Protective Logic

Compressor Minimum Run Time

For thermostat-controlled running cycles, the
compressor will have a minimum run time of 90
seconds. The compressor can be stopped at any time if
the system is switched to any Mode, except the Cool
Dry Mode.

Compressor Minimum Off Time (delay on
break)

When compressor is under the thermostat control,
it has a 2-minute delay before restarting when it has
cycled off.

Anti-freeze Protection

In Anti-Freeze Mode, the compressor and outdoor
fan will be stopped and the display will show “CF”.
The compressor and outdoor fan can be started only if
the following conditions are met:

1. after the 2 minute delay on break, AND

2. the indoor coil reaches 49°F or above and remains
there for at least 1 minute, OR

3. another Mode is selected.

The system is in Anti-Freeze Mode when the
following conditions are met:

1. The control is in either Cool or Cool/Dry Mode.

2. The indoor coil reaches 32°F and stays there for at
least ve (5) minutes.

3. The compressor has run for at least 90 seconds.
Sleep Timer is overridden during this operation.
Anti-freeze Protection is active in all modes of
operation and when the control is Off.

Table 3. – Failure Code and Condition

Thermistor Sensor Condition Error Code

< - 58°F or

Room > 140°F or E1

Open or Close

< - 22°F for > 2s or

Indoor Coil > 176°F for > 2s or E2

Open or Close

< - 22°F for > 2s or

Outdoor Air > 176°F for > 2s or E4

Open or Close

IM 960 Applied PTAC / Page 26 of 44

Room Freeze Protection

When room temperature falls below 41°F, the
hydronic valve is opened and the indoor fan operates
on High Speed. The compressor and outdoor fan are
off and the display will show “Rf”. The hydronic valve
will close when the room temperature rises back to
50°F. During room freeze conditions, the temperature
setting can be adjusted with the touchpad. Fan modes
and Sleep Operation are overridden during Room
Freeze Protection. Room Freeze Protection is active in
all modes of operation and when control is off.

Modes of Operation

Standard Digital Touchpad Control
Temperature Limiting

When the room temperature drops 5°F below set
point, the display will indicate “Lo.” When the room
temperature rises 5°F above set point, the display
will indicate “hI.” Alarm indications of 5°F above or
below set point will be consistent with the set up mode
settings for minimum and maximum temperatures.

Temperature Limit Settings

1 To adjust the lower operating temperature limit

(cool minimum set point) press and hold Fan
Mode button and adjust the setting with Up or
Down buttons. The minute setting is 60ºF (15ºC).

2. To adjust the upper operating temperature limit
(heat maximum set point) press and hold down
Fan Speed button and adjust the setting with Up
and Down buttons. The maximum setting is
85ºF (30ºC). When control selection is set for
“T'STAT,” the maximum setting can go up to 90ºF
(32ºC).

3. The upper operating temperature limit will be
displayed first.

4. Default settings are: Cool minimum 60ºF (15ºC)
and Heat maximum 85ºF (30ºC).

Electrical Service

All wiring should be done in accordance with all
local and National Electrical Code requirements. The
conditioners are supplied as follows:

Electrical Heating Unit

1. 208V and 230V models are supplied with a power

cord which will exit from beneath the conditioner
on the control side. The cord has a usable length of
72" (457.2mm) from where it exits the conditioner.
The use of an extension cord is not recommended.
Time delay fuses are recommended to avoid
nuisance tripping. The receptacle is generally
mounted beneath the conditioner, on or recessed in
the wall so that it is concealed by the conditioner
over hang. The space under the conditioner must
be at least 3" (76mm) high.

2. An electrical subbase is available for 208V and
230V units and contains a junction box for a eld
mounted receptacle All electrical connections are
made within the subbase, thus eliminating the

need for a wall mounted receptacle.
The subbase is available in 3" (76mm) or 4"
(102mm) height and can be furnished with factory
mounted fused disconnect option.

3. On all 265V models, an electrical subbase is
required. The chassis is supplied with a “short
cord” which is just long enough to plug into the
subbase. A plug cord cover is also furnished with
the subbase to make the interconnecting cord
inaccessible as required by the National Electrical
Code. The conditioner is marked with the

minimum circuit ampacity and maximum

fuse size.

Equipment Start-up

Initial start-up of the Incremental® conditioners
by experienced personnel is usually the responsibility
of the installing contractor. This start-up consist
of inspecting and operating the equipment for all
functions at the time of initial installation and making
necessary adjustments. It also includes demonstrating

its proper operation to the owner or his agent.

Note: That unless otherwise specically agreed to in

writing, McQuay International includes no eld labor,

start-up service or the like in the price of its equipment.

After the equipment leaves the factory, it may
become damaged or maladjusted during transportation
or on the job. Sometimes wires are disconnected
accidentally or fan motors move on their bases due to
rough handling, causing fans to strike. The correction
of such conditions is part of start-up.

CAUTION

Before starting equipment, make certain that:

1. Correct voltage has been supplied to the equipment.

2. The electrical plug from the control box has been
inserted into the receptacle.

During Start-up (applies only to standard equipment):

Note: Direction of conditioner air may be adjusted by

repositioning the discharge grille to change airow

pattern in a room. The building superintendent or
assistant manager should be requested to make any
changes.

IM 960 Applied PTAC / Page 27 of 44

PTAC/PTHP Startup

Report – Audit

Job Name __________________________________________ City ________________ G.O. # ____________

Installer __________________________________________________________________ Total No. of Units_____

Date of Final Inspection and Start-up ________________________________________ Unit Type

Manufacturers’ Representative Name ___________________________________ □ APTAC 16 × 42 □ Type K
□ APTAC 16 × 44 □ Type J
□ Enersaver

Name of Maintenance Manager Instructed ___________________________________ Other__________________

Essential Items Check

A. Voltage Check _____________ Volts (measured)

B. Yes No Condition Yes No Condition

□ □ Filters Clean □ □ Operates in Heating

□ □ Evaporator Coils/Drain Pans Clean □ □ Operates in Cooling

□ □ Wall Boxes Sealed To Wall, No Leaks □ □ Operates in Fan Only (if so equipped)
□ □ Wall Box Pitch Satisfactory □ □ Hi-Lo Fan Speed Operational (if so equipped)
□ □ Air Discharge Free of Obstruction □ □ Fans Rotate Freely Without Striking Fan Housing
□ □ Condenser Air Free of Obstruction □ □ Cycle/Continuous Fan (if so equipped)
□ □ Other Conditions Found: ___________________________________________________________

_______________________________________________________________________________
_______________________________________________________________________________
Note: “No” answers above require notice to installer by memorandum (attached copy).

Please include any suggestions or comments: _______________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________

Above System is in Proper Working Order FOR INTERNAL USE

Release:
Date SM ______________

CTS _____________

Sales Representative Signature T________________

Customer Signature Service Manager Approval

Date

McQuay International

4900 Technology Park Boulevard, Auburn, New York 13021-9030 USA [phone] Form No. 13F-1206

IM 960 Applied PTAC / Page 28 of 44

Controls

Premium (Programmable) Digital Touchpad
Control Operating Instructions

LED with Program
Setting Display

9-LED Indicators

Application

The PTAC Digital Control is used to control
a PTAC Unit that includes both an integral air
conditioner and a source of heat.

The Digital Control is operated with a Touchpad.

Inputs and Outputs

• Indoor coil sensor, (ICS)

• Outdoor coil sensor, (OCS)

• Indoor air sensor, (IAS)

• Outdoor air sensor, (OAS)

• Remote T’stat, T’STAT (RCWYBG)

• Power supply, (24VAC)

• Line voltage input, (L1, L2)

• Indoor fan standby voltage, (L1STB L2STB)

• Control selection, (LUI, T’STAT

• Model selection, (AC/E, HP, HP/E)

• Time delay bypass, (TEST)

• Indoor off fan cycle, (FAN, OFF CYCLE–10, 20,
30, 1 HR)

Outputs

• Compressor output, COM

• Indoor fan, BLOWER LO, HI

• Outdoor fan, OUTDOOR FAN

• Electric heater, ELE

• Reversing valve, REV VALVE

• Fresh Air Damper Motor, DM

User Interface

The user will by default control the Electronic
Controller via the touchpad. The user can select with
a jumper for the unit to receive commands from a
Remote Thermostat.

8- Push Button
Display Inputs

Keys and Indicators Labels

ON/OFF, FAN SPEED, MODE,

8 Push Buttons FAN MODE, SLEEP, PROG-ON/OFF

Temp buttons: for
Temp UP and for Temp DOWN

9 LED Indicators SLEEP, COOL, COOL/DRY, FAN,
HEAT, HIGH, LOW, CYCLE, CONT.

LED 2 Digit Displays No Label

Display Function Legend

Tr = Room Temperature
hI = High Room Temperature
Lo = Low Room Temperature
LA = Low Ambient Lockout
rT = Remote Thermostat Control
tP = Touchpad Control
t = Time

Ts = Temperature Setpoint

Rf = Room Freeze Condition
CF = Coil Freeze Protection
F = Fahrenheit
C = Celsius
LC = Control Lockout Mode

AU = Damper Setting (Automatic)
CL = Damper Setting (Closed)

Remote Thermostat Control

The Remote Thermostat can be any thermostat
that can interface with an electronic thermostat via
RCWYBG terminals. The Control Selection jumper
must be in T’STAT position. During a call the remote
thermostat will pass R back to the controller on a
respective terminal. The push buttons on the touchpad
become inactive in the remote thermostat mode.
However, the control pad LED display will indicate the

mode of operation, and the room temperature.

IM 960 Applied PTAC / Page 29 of 44

Controls

AM
9:45

TODAY

AM
9:45

Premium Digital Touchpad Control

Clock Set Menu

1.1 To set the time and day of the week, press
FAN MODE and FAN SPEED buttons

simultaneously for 5 seconds. Time will be
displayed rst:

Adjust the time by pressing and buttons.

1.2

By holding pressed or buttons, time will

change in 15 minutes increments or decrements,
respectively. AM and PM will show in rotation.

By pressing FAN MODE button, move to

1.3

the conrmation day of the week. Numbers
represent days of the week, Monday being 1 and

so forth. TODAY will ash on display. Adjust

the number that represents the day of the week

by pressing

and buttons:

1.4 Exit the clock set menu by pressing FAN
MODE (TIME) and FAN SPEED (DAY)

simultaneously for 5 seconds

Conguration

The conguration mode is meant for temperature scale
setting, limits for minimum and maximum operating
temperatures and displaying sensor readings. To
enter the conguration mode hold pressed

buttons for 5 seconds. Moving from one screen

to another and rolling over is done by pressing Mode

button.

and

2.2 To adjust the lower operating temperature limit

(cool minimum set point) press and

buttons. COOL and the setting will be displayed
as shown below. The minimum and factory
default setting is 60°F (15°C). An example of
what can be displayed:

2.3

To view the upper operating temperature limit

(heat maximum set point) press MODE button.
HEAT will be displayed. An example of what
can be displayed:

To adjust the upper operating temperature limit

2.4

(heat maximum set point) press and

buttons. The max and factory default setting is
85°F (30°C). When Control selection jumper
on control board is set for “T’STAT,” the max
setting can go up to 90°F (32°C).

By pressing MODE button repeatedly from the

2.5

previous screen, the following will be displayed
in sequence:

• Indoor air sensor reading

• Indoor coil sensor reading

• Outdoor air sensor reading

• Outdoor coil sensor reading

2.6 Exit the conguration mode by pressing and

buttons for 5 seconds

Once in the conguration mode, the default

2.1

temperature scale will be displayed as shown
below. Toggle the temperature scale to degree
Celsius by pressing either

or button:

IM 960 Applied PTAC / Page 30 of 44

COOL
DAY 1

AM

8:00

MORN

Controls

DAY 1
MORN

DAY 1

AM

8:00

MORN

DAY 1
HEAT

AM

8:00

Premium Digital Touchpad Control

3.1 The touchpad of the electronic controller can be
programmed for four time periods, MORN,
DAY, EVE, and NITE that are customizable for

each day of the week. Each period will have a
start time, heat and cool temperatures. The unit
will monitor the day and time, while maintaining
the specic conditions for each period of the
day. During programming, the item that is
ashing is adjustable.

To enter the program menu, press SLEEP ( )

3.2
and MODE ( ) buttons for 5 seconds.

3.3 By pressing SLEEP ( ) display will show

the day screen as shown below. Press or

button to change the day to program. To advance

to the next screen, press SLEEP ( ) button. To
return to the previous screen, press MODE ( )

button.

By pressing or button, the period of the

3.4

day will change.

3.5 To advance to the next screen, press SLEEP
( ) button. Starting time will ash.
Adjust the starting time by pressing or

buttons.

3.7 To advance to the next screen, press SLEEP

( ) button. Cool temperature will be

displayed. Adjust the cool setting with

and buttons.

o

78

3.8 To program the thermostat for each period of the

day, repeat steps 3.3 through 3.7.

Further, the thermostat can be programmed for

each individual day of the week or use the
SimplesetTM feature as described below.

Simpleset programming is a convenient method

3.9

of programming the thermostat. Once the entire

Monday (Day 1) schedule is set, Simpleset

programming will copy the Monday schedule to
every day of the week. After completing
Monday schedule, “day 2” will appear on
the screen. Press Down button once to get
to “day 1.” By pressing Down button for 3
seconds, days of the week will count down from
7 to 1 and settings are memorized. Once the
schedule is locked in, go through each day of the
week and make changes as needed. This feature

speeds up the programming of the standard

weekday/weekend schedule.

3.10 To exit the program mode, press MODE ( )
and SLEEP ( ) buttons simultaneously for 5

seconds.

After exiting the program mode, select the mode

3.11

of operation and activate the program mode by

pressing the PROG ON/OFF button.

3.6

To advance to the next screen, press SLEEP

( ) button. Heat temperature will be
displayed. Adjust the heat setting with and

buttons.

o

70

NOTICE

After a power outage, programmed daily settings will be
retained in memory. However, the clock must be reset
to the current time for the programmed daily settings to

resume the correct schedule of operation. See Clock Set

Menu instructions to reset the time and day of week.

IM 960 Applied PTAC / Page 31 of 44

Controls
Remote Wall Mounted Thermostats

Wall mounted thermostats are available for the
PDAF/PDHF unit in automatic or manual changeover
styles. All include a fan switch for constant “on”
operation or “automatic” for cycle operation with the
compressor. When requested, all necessary relays
and transformers are factory mounted and ready for
attachment to eld supplied low voltage wires. All
thermostats are 24-volt type and have dual Fahrenheit
and Celsius temperature setpoint scales.

Non-Programmable Heat/Cool Manual
Changeover Thermostat (107095701)

Simple to operate, single push button for one-stage
heating and cooling, or single stage heat pump. Zone
compatible, and 4- or 5 wire compatible (terminal “C”
is optional for non-heat pump systems). System “heat­off-cool” switch and fan “on-off” switch.

Figure 39. Non-Programmable Thermostat (107095701)

7-Day Programmable Manual Changeover
Thermostat (107095801)

Simple, logical programming for set-up and set­back temperatures and times. Compatible with single­stage heat pump systems. Enables separate morning,

day, evening, and night settings for every day of the

week. Simpleset™ feature enables easy copying of
one day’s programming for the entire week. Select
a warmer or cooler setting any time to temporarily
override any program setting. Vacation hold overrides
programming. Clear backlit display makes it easy to
see time, temperature and setpoint – even in the dark.

No batteries required.

Figure 40. 7-Day Programmable, Manual Changeover
Thermostat (107095801)

Specications

Electrical Rating:

• 24 VAC (18 to 30 VAC)

• 1 amp maximum per terminal

• 3 amp maximum total load

• 60-minute power backup (SC2001)

Temperature Control Ranges:

• 45oF to 90oF, Accuracy: ±1

o

F

System Congurations:

• 1 stage heat, 1 stage cool or single stage electric

heat pump

Terminations:

• R, C, W, Y, O, B, G

Specications

Electrical Rating:

• 24 VAC (18 to 30 VAC)

• 1 amp maximum per terminal

• 3 amp maximum total load

• 60-minute power backup (SC3001)

• Easy access terminal block

Temperature Control Ranges:

• 45oF to 90oF, Accuracy: ±1

o

F

System Congurations:

• Single stage heat, single stage cool or single stage
electric heat pump

Terminations:

• RC, RH, C, W, Y, O, B, G

IM 960 Applied PTAC / Page 32 of 44

Controls
Remote Wall Mounted Thermostats

Figure 41. 7-Day Programmable Thermostat
(107095901), and optional remote sensor (107096001)

Specications

Electrical Rating:

• 24 VAC (18 to 30 VAC)

• 1 amp maximum per terminal

• 4 amp maximum total load

• 60-minute power backup for clock

Thermostat Dimensions – 107095701,
107095801, 107095901

Temperature Control Ranges:

• 45oF to 90oF, Accuracy: ±1

o

F

System Congurations:

• Single stage heat, single stage cool or single stage
electric heat pump

Terminations:

• RC, RH, C, W, Y, O, B, G

IM 960 Applied PTAC / Page 33 of 44

Remote Wall Mounted Thermostats

Remote Thermostat Control

Notes:

In terms of outputs, there are two types of thermostats:
relay contacts and solid state.
Thermostats that do not have relays are typically solid
state.

Manufacturers of solid state output thermostats include
loading resistors on their installation kits. They are
of 560 Ohm and 3W value. These resistors are meant
to load thermostat solid state outputs in order for the

output voltage to be either 0 or 24VAC, i.e. no oating

voltage. These resistors are connected from W, Y, G to
common (C), respectively.

You can wire any type of 24Vac thermostat straight
into the REMOTE T’STAT connector of PTAC control
boards, 667997101 and 667997201 (Basic and
Premium models) and the control boards will recognize
the signals from them.

The Remote Thermostat can be any thermostat
that can interface with an electronic thermostat via
RCWYBG terminals. The Control Selection jumper
must be in T’STAT position. During a call the remote
thermostat will pass R back to the controller on a

respective terminal. The push buttons on the touchpad
become inactive in the remote thermostat mode.
However, the control pad LED display will indicate

the mode of operation, and the room temperature.

Installation of Remote Mounted Thermostat

Units that are furnished with remote mounted
thermostats should be wired as shown in Figure 40.
Other considerations for this arrangement are as follows:

1. When wiring the low voltage plug and receptacle

disconnect, provide enough wire to move harness
out of the way for chassis removal.

2. If subbase is used, a small hole must be drilled and

grommeted in the subbase front to allow passage
of the low voltage wires.

3. If secondary units are to be employed, see

connections in Figure 42. The number of
secondary units that can be connected is limited to
32 units.

4. When using a programmable wall thermostat,

connect it to the terminal board remote thermostat
plug. Refer to the instructions furnished with the
chosen thermostat.

Figure 42. Remote Thermostat with Primary/Secondary Control (Master/Slave) Wiring Connections

IM 960 Applied PTAC / Page 34 of 44

Premium (Programmable)
Digital Contol Wiring Diagram

1– Jumper Placement to Select System
Module (See Jumper Detail)

A– Place jumper across AC/HYD to select Air

Conditioner/Hydronic Heat.

B– Place jumper across AC/E to select Air

Conditioner/Electric Heat.

C– Place jumper across AC/HYD/E to select Air

Conditioner/Hydronic/Electric.

D– Place jumper across HP to select Heat Pump.
E– Place jumper across HP/E to select

Heat Pump/Electric.

2– Jumper Placement to Select Fan Control:

A– When in Fan Cycle Mode, fan operates for

2 minutes – Place jumper across
10, 20, 30, or 1 HR to select fan cycle off
minutes which will be overridden by the room

temperature.

3– Jumper Placement to Select
Controller Type:

A– Place jumper across LUI to select unit mounted

touchpad (Local User Interface).

B– Place jumper across secondary (SEC) to select

secondary control by a primary unit.

C– Place jumper across T’STAT to select remote,

wall mounted programmable, or non-
programmable thermostat.

4– Jumper Placement to Select
Hydronic Valve:

A– Place jumper across NO to select Normally Open

Hydronic Valve.

B– Place jumper across NC to select Normally

Closed Hydronic Valve.

Jumper Placement Detail

3

1

A
B

C
D

E

A

C

B

4

2

A

B

A

Wiring Diagram Legend

CT = Control Transformer
DM = Damper Motor
CM = Compressor Motor
IFM = Indoor Fan Motor
OFM = Outdoor Fan Motor
HFLO = Heat Fan Lockout Sensor
OCS = Outdoor Coil Sensor
OAS = Outdoor Air Sensor
ICS = Indoor Coil Sensor
IAS = Indoor Air Sensor
LUI = Local User Interface
HYV = Hydronic Valve
REV = Reversing Valve

EHC = Eletric Heat Contactor

IM 960 Applied PTAC / Page 35 of 44

Standard (Non-programmable)
Digital Contol Wiring Diagram

1– Jumper Placement to Select
System Module (See Jumper Detail)

A– Place jumper across AC/E to select Air Conditioner

with Electric Heat.

B– Place jumper across HP to select Heat Pump.
C– Place jumper across HP/E to select Heat Pump

with Electric Back-up Heat.

2– Jumper Placement to Select Fan Control

A– When in Fan Cycle Mode, fan operates for 2

minutes – Place jumper across 10, 20,
30, or 1 HR to select fan cycle off minutes which
will be overridden by the room temperature.

3– Jumper Placement to Select
Controller Type:

A– Place jumper across LUI to select unit mounted

touchpad (Local User Interface).

B– Place jumper across T’STAT to select

remote, wall mounted programmable, or non-
programmable thermostat.

Jumper Placement Detail

3

1

A
B
C

B

2

A

A

Wiring Diagram Legend

CT = Control Transformer
CM = Compressor Motor
IFM = Indoor Fan Motor
OFM = Outdoor Fan Motor
OCS = Outdoor Coil Sensor
OAS = Outdoor Air Sensor
ICS = Indoor Coil Sensor
IAS = Indoor Air Sensor
LUI = Local User Interface
REV = Reversing Valve

EHC = Eletric Heat Contactor

IM 960 Applied PTAC / Page 36 of 44

Wiring Diagrams

Digital Control Board With Standby Power

The standby power connections, L1 STBY and L2 STBY are meant to run

the indoor motor at a separate voltage from the other motors, compressor

and outdoor motor. When used as such, the jumpers, JH1 and JH2, must
be cut. This renders L1 & L2 and L1 STBY and L2 STBY isolated from

each other.

If there is no need to run the motors at a separate voltage the L1 = L1
STBY and L2 = L2 STBY. Therefore one voltage is used to run all motors.

If the jumpers are accidentally cut, then the connections can be
spliced to substitute for the missing jumpers.

Table A

Wire Color Voltage

WH 120V

RD 208V

OR 240V

BN 277V

Drawing No. 668001506

Legend

DM = Damper Motor
HYV = Hydronic Valve
CM = Compressor Motor
IFM = Indoor Fan Motor
OFM = Outdoor Fan Motor
HFLO = Heat Fan Lockout Sensor
OCS = Outdoor Coil Sensor
OAS = Outdoor Air Sensor
ICS = Indoor Coil Sensor
IAS = Indoor Air Sensor
LUI = Local User Interface
REV = Reversing Valve
IR = IR Receiver Board (AP7810)
C1 = Indoor Motor Capacitor
C2 = Outdoor Motor Capacitor
C3 = Compressor Capacitor
MP = Motor Protector

Note: The gray tinted areas in the wiring diagram; are options available only with the premium control board.
For the latest drawing version refer to the wiring diagram located on the inside of the controls access panel of the unit.

IM 960 Applied PTAC / Page 37 of 44

Digital Control Board Without Standby Power

The standby power connections, L1 STBY and L2 STBY are meant to run

the indoor motor at a separate voltage from the other motors, compressor

and outdoor motor. When used as such, the jumpers, JH1 and JH2, must
be cut. This renders L1 & L2 and L1 STBY and L2 STBY isolated from

each other.

If there is no need to run the motors at a separate voltage the L1 = L1
STBY and L2 = L2 STBY. Therefore one voltage is used to run all motors.

If the jumpers are accidentally cut, then the connections can be
spliced to substitute for the missing jumpers.

Table A

Wire Color Voltage

WH 120V

RD 208V

OR 240V

BN 277V

Drawing No. 668001406

Legend

DM = Damper Motor
HYV = Hydronic Valve
CM = Compressor Motor
IFM = Indoor Fan Motor
OFM = Outdoor Fan Motor
HFLO = Heat Fan Lockout Sensor
OCS = Outdoor Coil Sensor
OAS = Outdoor Air Sensor
ICS = Indoor Coil Sensor
IAS = Indoor Air Sensor
LUI = Local User Interface
REV = Reversing Valve
IR = IR Receiver Board (AP7810)
C1 = Indoor Motor Capacitor
C2 = Outdoor Motor Capacitor
C3 = Compressor Capacitor

MP = Motor Protector

Note: The gray tinted areas in the wiring diagram; are options available only with the premium control board.
For the latest drawing version refer to the wiring diagram located on the inside of the controls access panel of the unit.

IM 960 Applied PTAC / Page 38 of 44

Maintenance (Scheduled)

Incremental conditioners are built to last. With
proper care, the unit should provide uninterrupted
service for many years. Scheduled maintenance of
this equipment as described below is the key to the
equipment’s longevity.

A. Air lters must be cleaned at regular intervals.
Twice annually may be adequate in some areas
while twice monthly may be required in others.
Areas with high dirt and lint content or heavy
usage of units require more frequent lter
maintenance than those areas of relatively clean
operating or low usage conditions. Unit
malfunction will occur if air lters are not kept
clean. Rinse lter with hot water and a mild

detergent.

B. McQuay recommends that every year the chassis
be removed for a thorough checkup. This should
be completed as follows:

1. Unplug unit from power source.

2. Remove front panel.

3. Remove chassis from cabinet and move it to the
maintenance department. Replace with spare
chassis or weather plate.

4. Check all seals and insulation and repair as

required.

5. Check all wiring and controls for hazardous
conditions.

6. Thoroughly clean discharge grilles.

7. Cover motors and control module with water tight
material and wash evaporator coil, condenser coil
and base pan using hot water and a mild soap.

10. Clean any rust spots with steel wool and paint with

rust inhibiting paint.

11. Clean insulation or replace if necessary.

12. Check insulation on refrigeration piping and
replace if necessary.

13. Check all fasteners and tighten as required.

14. Clean and oil damper door and linkage.

15. Test run chassis before reinstalling.

Equipment Protection From The
Environment

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

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

1 Avoid having lawn sprinkler heads spray directly

in or on the outdoor louver.

2 In coastal areas, the units must have the corrosion

protection package to maintain the warranty
coverage.

Regular maintenance will reduce the buildup of
contaminants and help to protect the outdoor
section of the unit.

CAUTION

Residential and institutional cleaning compounds can
cause permanent damage to the packaged terminal
unit. To avoid damage to unit controls and heat transfer
surfaces, do not spray cleaning compounds onto the
discharge grille, return air opening, or unit controls.
Normal cleaning can be accomplished by wiping the
unit surface with a damp cloth. When using cleaning

compounds on carpets, oors or walls, turn the unit off

to avoid drawing potentially damaging vapors into the
package terminal unit.

8. Check condensate removal system and assure
proper operation. Pour at least two (2) cups of

water into evaporator drain pan and verify proper

operation. Clean condensate drain and clear weep
holes located at the bottom rear of wall sleeve.

9. Dry equipment thoroughly, especially electric
parts and installation.

1 Frequent washing of the outdoor section,
condenser fan blade and condenser coil with
fresh water will remove most of the salt or other
contaminants that build up in the outdoor section

of the unit

2 Regular cleaning of the cabinet with a good non­ abrasive polish will provide protection and keep it
in good condition.
3 A mild liquid cleaner may be used several times a

year to remove matter that will not wash off with

water.

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

IM 960 Applied PTAC / Page 39 of 44

Maintenance

Recommended Spare Parts

An inherent advantage of the Incremental system
is that failure of any part affects only one incremental
conditioner and does not interrupt the operation of
the rest of the system. A further advantage is that a
failed part can be quickly and easily replaced, thus
minimizing the inoperative time of the equipment.
This is so, however, only if a replacement part is
quickly available. In order to replace a failed part
quickly and keep all incremental conditioners in
good operating condition, McQuay International
recommends that at the time incremental conditioners
are purchased, owners arrange for a small stock of
replacement parts.

Where an owner carries such a stock, immediate
replacement of defective parts is possible. The
defective part can then be returned to McQuay
warranty parts. As long as it is still in warranty, it is
repaired or replaced and returned to the owner with
out cost for shop labor and material. Thus, the stock of
replacement parts is constantly replenished. Below is a
list of the kinds of parts which McQuay International
recommends to be carried in stock together with the
quantity of parts recommended per 100 incremental
conditioners installed.

Cooling Chassis
Compressor Overload Device
Compressor Running Capacitor
Fan Motor. Capacitor
Control Board
Thermostat
Control Relay (if used)
Damper Motor (if auto damper)
Electric Resistance Heater (if electric heat)

Touch-up Paint (1 pt. spray can) .................................2

..........................................................2

.....................................2

..................................2

.................................................. 2

.............................................................. 2

..................................................................2

................................................ 2

..................................2

...............2

Refrigeration Cycle

Every motor-driven refrigeration system operates
on the carnot cycle. A practical understanding of what
goes on at the various steps in this cycle can be a
big help to the troubleshooting mechanic. Figure 43
illustrates the refrigeration cycle. The diagram shows
what occurs in each component of a hermetically
sealed system as used in all McQuay Air Conditioning
equipment. The temperatures shown are typical

of what they might be when the air entering the

condenser (outdoor temperature) is 95°F, (350 C)
and the temperature of the conditioned space is

80°F (270 C).

Figure 43. Refrigeration Cycle

45°F. (7°C.)

R22 (Liquid and Gas)

to Evaporator

80°F. (27°C.)

Room Air to Evaporator

Evaporator

60°F. (15.5°C.)

Conditioned Air to Room

Capillary

Restrictor

110°F. (43°C.)

Liquid R22 to

Capillary

120°F. (49°C.) Condenser Air

to Outdoors

Condenser

95°F. (35°C.)

Outdoor Air to Condenser

60.3 psia (416 kPa)
& 60°F. (15.5C.)

to Compressor (Gas)

Hermetic

Compressor

285.3 psia (1967.7 kPa) R22 to Condenser (Hot5 Gas)

For the current spare parts list, and applicable
prices, see your McQuay representative or write
McQuay Service, P.O. Box 1551, Minneapolis, MN

55440.

IM 960 Applied PTAC / Page 40 of 44

Fault and Protection Codes for Applied PDAF/PDHF Control Board

Fault code Description Cause for the fault

CE Communication Error 1. Cable not plugged in properly on either LUI or relay board.

2. Defective cable.
Sh Missing Shunt The user congurable shunt for System Select, Control Select Off Fan Cycle, and/or Hydronic Valve is

missing or not placed properly.

E1 Problem with IAS Indoor Air Sensor missing or short.
E2 Problem with ICS Indoor Coil Sensor missing or short.
E3 Problem with OCS Outdoor Coil Sensor missing or short.
E4 Problem with OAS Outdoor Air Sensor missing or short.
E5 Problem with HFLO Sensor HFLO Sensor missing or short on AP7809.

Protection
code

CF Coil Freeze Protection Indoor coil temperature has been below 32ºF for 5 minutes.
Protection feature and the displayed code are dismissed when indoor coil temperature rises above 49ºF.

Rf Room Freeze Protection Indoor air temperature has dropped below 41ºF. Protection feature and the displayed code are
dismissed when indoor room temperature rises at and above 50ºF.

hI High Room Temperature Indoor air temperature is 5 degrees above maximum setpoint limit. Protection feature and the displayed
code are dismissed when indoor coil temperature rises above 50ºF.

Lo Low Room Temperature Indoor air temperature is 5 degrees below minimum setpoint limit.

LA Low Ambient Lockout Outdoor air temperature is below 35ºF.

Description Cause for the fault

Solid State Digital Controls – Local User Interface Display Codes

Fault code Description Cause for the fault

LC Control Lockout – Displays for 5 seconds when any button is pushed when in the "lockout mode".
nL Control Lockout – Displays for 5 seconds to conrm normal mode of operation when control lockout turned off.

Normal Control

CL Damper Closed Control setup indicator damper is in "closed" mode.
AU Auto Damper Control setup indicator damper is in "automatic" mode.
AU Auto HP/E Control setup indicator heat pump electric is in automatic changeover mode (HP/E).
bY HP/E Bypass Control setup indicator, electric heat is bypassed when OCS > 40˚.
CF Coil Freeze Protection Indoor coil is ≤ 32˚ for at least 5 minutes. Compressor and outdoor fan stop and indoor fan continues

to run for active defrost.
rF Room Freeze Protection Room temperature < 41˚. Damper closes (Premium board) and unit goes into heat mode.
Lo Coil freeze protection Room temperature is 5˚ below set point.

Hi Temperature Limiting Room temperature is 5˚ above set point.
LA Low Ambient Lockout Unit is in cooling mode and outdoor air < 35˚. Compressor will cut out.
E1 Indoor Air Sensor Indoor Air Thermister Failure.
E2 Indoor Coil Sensor Indoor Coil Thermister Failure.
E3 Outdoor Coil Sensor Outdoor Coil Thermister Failure.
E4 Outdoor Air Sensor Outdoor Air Thermister Failure.

IM 960 Applied PTAC / Page 41 of 44

Troubleshooting

These items should be checked by a qualied service technician only.

1. Blowers won’t operate on cool

2. Blowers operate on cool but compressor
does not start

3. Blowers run on cool and compressor starts but stops

after a short interval.

4. Blowers run on cool and compressor starts and runs, but

compressor occasionally stops (on overload device).

5. Compressor starts and runs on cool but

blowers do not run.

Trouble Cause Cure

a. No power

b. Faulty touchpad switch
c. Loose connection at touchpad switch

a. Thermostat set too high.
b. Heat valve is open and heat is on.
c. Low voltage.
d. Faulty touchpad switch.
e. Faulty connection at touchpad switch.
f. Defective communication card.
g. Loose connections at compressor terminals.
h. Wiring to compressor terminals defective.
i. Loose connections in compressor overload device.

j. Starting capacitor malfunctions (open circuited, short

circuited or loss of capacity).

k. Def ecti ve compr esso r motor (sho rt circu ited , open

circuited, grounded).

a. Operation of overload device due to overloading com-

pressor motor.

a. Low voltage due to overload circuits within building or

throughout the local power system. Due to varying power
demands, this condition might exist only at certain times
during the day or on very hot days.

b. High voltage due to uctuations in local power system;

usually occurs during low load periods of the day

c. Partial short circuit in compressor motor. Under normal

loading a compressor with a partial short circuit might

appear to be operating all right; increased condensing

air temperature might then cause a short.

a. Open circuited blower motor.

b. Blower rubbing against its housing.
c. Bearings on blower motor seized.

a. Check supply line fusses, circuit breakers, and be sure

the power is on. Blown fuses would indicate circuit over­loading, a short circuit, or a ground condition in the circuit
Voltage supply to the equipment should be checked.

Voltage underload must be within 10% of voltage given

on date plate.
b. Replace.
c Tighten communication card connections / replace

a. Adjust Rotate control knob to “Cooler.”
b. Close heat valve.
c. Check as above.
d. Replace.
e. Tighten.
f. Replace.
g. Tighten.
h. Replace.
i. Tighten.

j. Replace.
k. * Ship cooling chassis prepaid to nearest McQuay au-

thorized warranty station.
a. Check voltage supply. Clean condenser inside and out.

Check at outside face of condenser for recirculation of

condenser air. Put air “splitters” in, if missing. Check com-

pressor for short circuit. If defective, ship cooling chassis

to nearest McOuay authorized warranty station.

a. Run separate electric line to equipment Consult local

power company.

b. Consult local power company.

c. If conrmed, ship cooling chassis prepaid to nearest

McOuay authorized warranty station.

a. Replace.
b. Adjust blower motor or blower wheel position.
c. Replace motor

6. Compressor starts and runs on cool, but fan motor starts,
then stops.

7. Equipment gives electrical shock.

8. Insufcient cooling capacity.

IM 960 Applied PTAC / Page 42 of 44

a. Operation of the internally connected overload device

due to a short circuit in blower motor.

b. Windings, rubbing of blower wheel or lack of lubrication

in blower motor bearings.

a. Grounded electrical circuit.

a. Equipment standing too long without being run.

b. Insufcient airow through condenser due to:

1) Dirty condenser.

2) 0bstructed louver on outer cabinet or wall

box.

3) Condenser blower/fan not running.

4) Condenser blower/fan not up to speed.

5) Condenser blower/fan slipping on motor

shaft.

6) Recirculation of condenser air.
c. Insufcient airow through evaporator due to:

1) Dirty evaporator.

2) Ice on evaporator coils.

3) Dirty air lter.

4) Obstructed discharge grilles.

5) Evaporator blower motor not running.

6) Evaporator blower motor not up to speed.

7) Evaporator motor slipping on motor shaft.

d. Heat load in room exceeds capacity of equipment.
e. Windows and doors in room are open
f. Compressor not pumping, indicated by:

1) Low wattage.

2) Condenser not warm, evaporator only

partially cool or not at all .
g. Restricted capillary or strainer.

1 ) Frost on capillary or strainer

2) Low wattage.

3) Condenser not warm.

4) Evaporator partially frosted, only partially cool

or not at all.

a. Replace motor

b. Adjust blower wheel or motor, or replace.

a. Eliminate ground.

a. If the air conditioner is allowed to stand for an extended

length of time without being run on cool, it is possible for
all the refrigerant to become absorbed in the oil inside the
compressor and refrigeration circuit. If this should hap­pen there will be no cooling until the necessary working

pressures have been established. This will take about 5

minutes of continuous running.

b.

1) Clean.

2) Remove obstructions.

3) Check same as in the case of malfunctioning

condenser air blower.

4) Check for correct voltage. Replace blower motor

if necessary

5) Adjust blower position and tighten setscrews.

6) Correct as in No 3 above.

c.

1) Clean.

2) Turn equipment off to let ice melt (see last
two items of No. 9 “Too much cooling,” on page 15.

3) Clean or replace.

4) Remove obstructions.

5) Check as in No.1.

6) Check for correct voltage.

7) Adjust blower wheel position and tighten setscrew

d. Refer to original load calculations, recalculate heat load.
e. Close them.

f. * Ship prepaid to nearest McQuay warranty

station.

g. * Ship prepaid to nearest McOuay warranty

station.

Replace motor if necessary.

Troubleshooting

These items should be checked by a qualied service technician only.

Trouble Cause Cure

9. Too much cooling.

10. “Sweating.”

11. Blowers won’t operate on Heat.

12. Equipment is noisy.

a. Thermostat set too low.
b. Defective thermostat

a. Condensate drain from evaporator to condenser

plugged.

b. Insulating seals on equipment damaged.

c. Evaporator blower motor not up to speed.
d. Evaporator blower incorrectly positioned.

a. No power.

b. Heat is off (equipment with heat fan lock out).

c. Faulty push-button switch.
d. Loose connections at push-button switch.
e. Thermostat set too low.

a. Blower rubbing against enclosure.
b. Blower motor bearings dry.

c. Loose blower hold-down nuts on motor-bracket
assembly
d. Refrigerant absorbed in compressor oil after extended
shutdown.

e. Equipment improperly installed.

f. Loose terminal box cover on side of compressor.
g. Loose electrical components.
h. Copper tubing vibrating.

a. Adjust.
b. Replace.

a. Remove obstructions to water ow.

b. Adjust or replace.
c. Check for correct voltage. Replace motor if necessary.
d. Tighten.

a. See No. 1.
b. Open heat valve or turn on heating system.

c. Replace.
d. Tighten.
e. Adjust. Rotate control knob to “warmer”.

a. Adjust fan position on motor shaft or reposition fan

motor bracket assembly.
b. Replace motor.
c. Align blower assembly and tighten nuts.

d. Noise will disappear after equipment runs awhile.
e. Make necessary adjustments to components.

f. Tighten.
g. Fasten securely.
h. Occasionally equipment will have noise for no ap-

parent reason. Inspection has revealed no loose

components that might be the source of the noise.

Due to the action of the compressor, it is possible to

have internal noise develop if the refrigerant tubing has

become bent even slightly. To distinguish this condition

from the simple rattle producing vibration caused by

loose screws, nuts and other components, grasp the

refrigerant tubing at various points throughout the sys-

tem until a point is found where the noise is eliminated

or reduced. Bend the copper
tubing very gently until the noise disappears.

13. Insufcient or no heat.

i. Harmonics.
a. No steam or hot water being applied.

b. No power.

c. Faulty or inoperative HFLO sensor.

d. Loose connection at touchpad.
e. Thermostat set too high.
f. Thermostat faulty.
g. No power output on transformer secondary.
h. Inoperative valve.

1) Steam valve N/C.

2) Hot water valve N/C.

i. Tighten.
a. Contact building management.

b. Check power supply line fuse, circuit breakers. Blown

fuses would indicate circuit overloading, a short circuit,

or a grounded condition in the circuit.
c. Replace or check location of sensor.
d. Replace wire or tighten connection.
e. Adjust.
f. Replace.
g. Replace.
h.

1) Temporarily lock valve open; replace.

2) Replace.

Notes:

This guide was prepared with standard equipment in mind. If equipment is special, it may not be entirely applicable.
* If equipment is still in warranty.
** Note: Before trying to correct the noise, determine its cause such as conditioned air blower, compressor or
condenser blower. Operate the conditioned air blowers only. If this doesn’t cause the noise, operate on cooling.
Then disconnect one compressor lead. If the noise stops, the compressor is the source, If not, it is caused by the
condenser blower.

IM 960 Applied PTAC / Page 43 of 44

Unit Weight - Chassis and Cabinet Assembly

Model 007 009 012 015 017

PDAF 129.5 137.0 137.9 145.6 150.6
PDAF (Packaged) 144.5 152.0 152.9 160.6 165.6
PDHF 131.0 138.5 139.4 147.1 –
PDHF (Packaged) 146.0 153.5 154.4 162.1 –

16˝ x 42˝ Wall Sleeve

(Packaged) ................................................28 lbs. (13 kg)

Louvers

Flush-stamped ..............................................6 lbs. (3 kg)

Architectural

Subbase

3" (76mm) High Electrical ........................10 lbs. (5 kg).

4" (102mm) High Electrical
8" (203mm) High Hydronic

................................................8 lbs. (3 kg)

....................12 lbs. (5.4 kg)

.......................20 lbs. (9 kg)

McQuay Training and Development

Now that you have made an investment in modern, efcient McQuay equipment, its care should be a high priority.

For training information on all McQuay HVAC products, please visit us at www.mcquay.com and click on training, or

call 540-248-9646 and ask for the Training Department.

Warranty

All McQuay equipment is sold pursuant to its standard terms and conditions of sale, including Limited
Product Warranty. Consult your local McQuay Representative for warranty details. Refer to Form

933-43285Y. To nd your local McQuay Representative, go to www.mcquay.com.

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

©2008 McQuay International [phone] www.mcquay.com IM 960 Applied PTAC / 12-08 Page 44 of 44

www.mcquay.com.