McQuay PDHP Installation Manual

Installation & Maintenance Data

Applied Packaged Terminal Air Conditioner

16" x 42" PDAC/PDHP With Top-Mounted Hydronic Heat

IM 882

Group: PTAC

Part No.: 668109501

Date: January 2008

©2008 McQuay International

Table of Contents

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

Inspection .....................................................................3

Nomenclature ...............................................................4

Introduction ..................................................................5

Dimensional Data .......................................................6

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

Louver Frame Installation .....................................

Wall Sleeve Extension Installation ........................

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

Wall Sleeve Installation ........................................8-12

Thin Wall Construction ....................................

Thick Wall Construction ......................................

Anchoring Wall Sleeve ........................................

Installation of Louvers .............................................12

Electrical Service .................................................

Installation of Cooling Chassis ..........................12-13

Installation of Heat Section .....................................13

Installation of Room Cabinet .................................. 14

Supply and Return Coil Arrangements ................. 14

Controls

PDAC/PDHP Digital Touchpad Control ...........15-19

Inputs & Outputs .................................................

Keys and Indicators Labels .................................

Display Function Legend ....................................

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

7
7
8

8-10

11
12

12

15
15
15
15

Operation .............................................................16-17

Modes of Operation-Description .......................17-19

Control Board Conguration .............................19-20

Incremental Start-up Report Audit ........................21

Equipment Start-up .................................................22

Controls Operating Instructions .......................23-25

Remote Wall Mounted Thermostats ...............

Wiring Diagrams .................................................28-31

Remote Thermostat Primary/Secondary Unit

Wiring Connections .............................................

Premium (Programmable) Digital Control ..........

Premium (Programmable) Digital

Control Board ......................................................

Premium (Programmable) Digital Control

Board with Standby .............................................

Scheduled Maintenance ........................................... 32

Equipment Protection from the Environment .....

Recommended Spare Parts .................................

Refrigeration Cycle ............................................

Faults and Protection Codes

PTAC/PTHP Control Board ................................

Solid State Digital Controls

LUI Display Codes ..............................................

Troubleshooting ...................................................35-36

26-28

28
29

30

31

32

33
33

34

34

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.

IM 882 / Page 2 of 36

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 International Trafc
Department should then be notied. The unit nameplate
should be checked to make sure the voltage agrees with
the power supply available. This unit is 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 is
accomplished with a top mounted hydronic heating coil.

Each conditioner consists of the following
components:

1. Cooling Chassis — Shipped separate in a single
carton.

2. Wall Sleeve — Shipped separate in a single carton
or in a multi-pack of 15.

3. Hydronic Heat Section — Shipped in a separate
carton.

4. Outdoor Louver — Shipped in a separate carton.

5. Room Cabinet — Shipped in a separate carton with
kickplate attached.

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 882 / Page 3 of 36

McQuay Model PDAC/PDHP 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 DAC 1 009 E M R H A B A M A A E

Unit Type

P = PTAC

Product Identier

DAC = PDAC
DHP = PDHP

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

Voltage

A = 115-60-1
E = 208/230-60-1
J = 265/277-60-1
P = 208/230-60-1 w/stndby 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 – 18" (Optional)

Y = None

Brand Name

M = McQuay

Refrigerant

R = R-22

Heating Type

E = Electric Heat

H = Hydronic

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

Electric Heat

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

Y = None

Hydronic Heat Type

S = Steam Top Mount (Normally Closed)
T = Steam Subbase (Normally Closed)
H = Hot Water Top Mount (Normally Open)
J = Hot Water Subbase (Normally Open)

Y = None

Room Interface

Cabinet Type

A = Top-Mounted Hydronic Flat top,

Bottom Return

Controls

Control Board Type

PNUY = Premium, Non-Programmable, Unit Mounted
PNWY = Premium, Non-Programmable, Wall Mounted
PNRY = Premium, Non-Programmable, Infared

PPUY = Premium, Programmable Unit Mounted
PPWY = Premium Programmable, Wall Mounted
PPRY = Premium Programmable, Infrared

Damper Type

Damper Control

A = Automatic (Required for Hydronic Heating Subbase)

M = Manual
Y = None

IM 882 / Page 4 of 36

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® Applied Packaged Terminal Air Conditioners
and Heat Pumps are designed and built for through-the­wall installation in either new or existing buildings. The

Figure 1. Exploded View of the 16" x 42" PDAC/PDHP with Top-Mounted Hydronic Unit

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.

Room Cabinet

Top-Mount Hydronic Heat Section

Cooling Chassis

Louver (Architectural)

16" x 42" Wall Sleeve

Removable Front Panel

Premium Digital Touchpad Control

IM 882 / Page 5 of 36

Dimensional Data

Figure 2. Unit dimensions – Chassis

Premium
Digital
Touchpad Control

Figure 3. Unit dimensions – Wall Sleeve, Cabinet & Louver

Note: Electrical rough-in should be located behind kickplate

11⁄2"
(38mm)

191⁄2"

(495mm)

3"

(76mm) Min.

(removable front) and below wall sleeve.

52"

(1320mm)

Wall Space For Piping
Rough-in
(Typ. R.H. & L.H.)

3"

(76mm)

Kickplate (Removable
Front)

(22mm)

7/8"

“A” – IN. (MM) “D” – IN. (MM) “B” – IN. (MM)

11⁄4" RECESS FOR ARCHITECTURAL LOUVER

ROOM CABINET WALL SLEEVE WALL THICKNESS

3

⁄

18
17
16
15
14
13
12
11
10
10
10
10
10

(476) 133⁄

4

3

⁄

(451) 133⁄

4

3

⁄

(425) 133⁄

4

3

⁄

(400) 133⁄

4

3

⁄

(375) 133⁄

4

3

⁄

(349) 133⁄

4

3

⁄

(324) 133⁄

4

3

⁄

(298) 133⁄

4

3

⁄

(273) 133⁄

4

3

⁄

(273) 143⁄

4

3

⁄

(273) 153⁄

4

3

⁄

(273) 163⁄

4

3

⁄

(273) 173⁄

4

(349) 43⁄4–53⁄

4

(349) 53⁄4–63⁄

4

(349) 63⁄

4

(349) 73⁄

4

(349) 83⁄

4

(349) 93⁄

4

(349) 103⁄

4

(349) 113⁄

4

(349) 123⁄

4

(375) 133⁄

4

(400) 143⁄

4

(425) 153⁄4 –163⁄

4

(451) 163⁄

4

4

4

4

–103⁄

4

4

4

4

4

4

4

–73⁄
–83⁄
–93⁄

–123⁄
–133⁄
–143⁄
–153⁄

–173⁄

–113⁄

(121–146)

4

(146–171)

4

(171–197)

4

(197–222)

4

(222–248)

4

(248–273)

4

(273–298)

4

(298–324)

4

(324–349)

4

(349–375)

4

(375–400)

4

(400–425)

4

(425–451)

4

Standard Size Wall Sleeve

Wall Thickness

“A”

“B”

27⁄8"

11⁄4" (32mm)

(67mm)

16"

(406mm)

51⁄2"

91⁄8"

(232mm)

“D”

(140mm)

7/8"

(22mm)

3"

15⁄16"

(33mm)

15⁄8"

(41mm)

(76mm) Min.
Kickplate Height

IM 882 / Page 6 of 36

WARNING

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.

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 16¼" high x 42¼"
wide. Before installing the unit, check the wall opening
to be sure the wall sleeve will slide into the opening
unobstructed. For masonry walls, a lintel must be used to
provide support over each opening.
When using a louver frame, the opening must measure
165/8" x 425/8". Louver frames should be used for
panel wall and thin wall applications to assure positive
anchoring to the wall (Figure 4).
The opening must start 4" above the nished oor
(including carpeting) to provide proper return air.

Louver Frame Installation

When a louver frame is used, it must be installed prior
to, or at the same time, as the wall sleeve, and it must be
level and square.

1. Apply caulking compound on the surfaces of the lou
ver frame’s four anges which will come in contact
with the wall. Add caulking as required for weather
tight seal.

2. Insert the sleeve of the louver frame into the wall
opening from the exterior of the building and apply
rm pressure so that the caulked frame anges are
snug against the exterior of the building. Secure the
louver frame to the wall if desired.

3. Secure the louver frame to the wall through the sides
and top. Never secure the frame through the bottom
as it may cause leaks.

If the louver frame is to be installed in a panel wall, it
should be installed at the same time as the wall sleeve.

Figure 4. Louver Frame Dimensions

423/16"

163/16"

443/16"

33/4"

Note: Wall Sleeve rough opening when using a Louver Frame must
be 165/8" x 425/8"

Wall Sleeve Extension Installation

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. Do not permit caulking to block the
weep holes. 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.

4. Continue wall sleeve installation according to
instructions on page 8.

-

Figure 5. Wall Sleeve Extension

24"

As Required

16"

Air Splitters

111/8"

24"

42"

183/16"

Room Side

CAUTION

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

cause leaks.

67/8"

Wall Sleeve Extension

IM 882 / Page 7 of 36

Wall Construction Types

Figure 6. Panel Wall (Thin) Construction

Steel Studs

Concrete

Pillars

Wall Sleeve Installation

Thin Wall Construction

The standard wall sleeve is designed to be easily installed
in a variety of wall constructions. For panel wall and thin
wall construction, it is recommended that the optional top
angle be used and the wall sleeve be supplied with a turned
down ange (see Figures 9, 10 & 11).
The recommended procedure for installing units in panel
wall and thin wall construction is as follows:

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

161/4" x 421/4"
Wall Sleeve
Rough Opening or
165/8" x 425/8" When using a

Louver Frame

(See page 7 for Installation)

Floor

Figure 7. Frame and Brick Construction

16" x 42"
Wall Sleeve

161/4" High

1

42

/4" Wide Wall

Sleeve Rough Opening

Figure 8. Masonry Wall (Thick) Construction

Room Side

Lintels (by others)

2. Recess the wall opening so that the louver is ush with
the exterior of the building. The center of gravity is ap­proximately 103⁄4" (273mm) from the rear face of the
standard wall sleeve. If a subbase is not used, eld sup­port must be provided up to the center of gravity. This
support can be metal, wood or concrete.

3. Level wall sleeve side to side and pitch to outside 1/8"/ft.
to assure proper sleeve drainage to outside. Anchor with
appropriate fasteners. Use holes provided (see Figure 15,
page 12) or drill additional holes as required to secure
rmly.

Lintel

(by others)

CAUTION

Do not drill holes in the base of the wall sleeve. Use shims

between the wall and the wall sleeve to prevent wall sleeve
distortion during anchoring.

4. Caulk the wall sleeve to the wall opening on both the
inside and outside perimeter. This can be done from the
inside of the building. Be careful not to plug the weep
holes.

Note: When using recessed louver wall sleeve, level and plumb wall
sleeve using the top and sides of the sleeve and the chassis slide rails.
DO NOT level using the bottom of the wall sleeve as it has a built in
pitch to drain.

Wall Sleeve Extension

(See page 7 for

Installation)

IM 882 / Page 8 of 36

Splitters

16" x 42" Wall Sleeve

Figure 9. 16" x 42" wall sleeve with continuous ange and drip edge

X*

Flange location (from outdoor side of sleeve)
is factory provided in increments of 1/8"

42"

Louver Mounting Holes

Figure 10. Wall sleeve installation for thin wall
construction

B**

Insulation Wet Panel

Window Stool

1-5/8" Metal Stud 16" O.C.

3-1/2" Thick

Batt Insulation

D**

Flange Height

(Standard = 1-1/4")

16"

Drip Edge

Figure 11. 16" x 42" wall sleeve with optional leveling

legs and continuous ange

13-3/4"

X*

Optional

Continuous
Flange

42"

11/4"

16"

X*

D**

Notes:

** See table on page 6, for dimensions “D” and “B”.
* Dimension

“X” is eld determined or specied. Angle is factory welded at given dimension when option is designated.

Hydronic Heat

Coil Section

Cabinet

Leveling Leg

to Support

Outdoor Side of

Sleeve

Note:

Given dimensions are standard.

Optional

Leveling Leg

63/8"

IM 882 / Page 9 of 36

Wall Sleeve Installation —

Thin Wall Construction

Applications utilizing eld supplied louvers require ad­ditional considerations:

1. Louvers supplied by others must have 70% free area
or a pressure drop not exceeding 0.05 in. w.g. (12.45
Pa) at 300 fpm (1.524 m/sec) face velocity, and a blade
design that will not cause recirculation of air.

2. McQuay does not warrant the rain and water leakage
resistance of its equipment when used with louvers by

others.

3. All louvers by others must be approved by McQuay
engineering prior to installation.

Figure 12 illustrates a typical installation using a eld
supplied, continuous louver. This method is for illustra­tion purposes only. Other variations may be employed as
long as they meet McQuay's louver specications listed
above and so long as adequate wall support is achieved.
All structural supports and fasteners (except the optional
top angle and turned down ange) are eld supplied.
Installation of wall sleeves with continuous louvers is
very similar to that of applications with factory furnished
louvers. Assuming the louver meets the McQuay’s criteria,
as stated previously, proceed to install the wall sleeve as
follows:

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

2. Position the wall sleeve into the wall so that it is ush
with the exterior wall. Important: If the wall sleeve
has been installed into a thick wall, make certain the
wall sleeve protrudes into the room a minimum of
11/8" (29mm) beyond the nished wall surface. This
is to accommodate the heat section and room cabinet.
The center of gravity is 103/4" (273mm) from the rear
face of the standard wall sleeve. If no subbase is being
employed, adequate support for the wall sleeve up to
the center of gravity must be provided at the job site.
This support can be wood, metal or concrete.

3. Level wall sleeve side to side and pitch to outside 1/8"/
ft. to assure proper sleeve drainage to outside. Anchor
with appropriate fasteners using holes provided (see
Figure 15, page 12), or drill additional holes as required
to secure rmly.

CAUTION

Do not drill holes in the base of the wall sleeve. Use shims

between the wall and the wall sleeve to prevent wall sleeve
distortion during anchoring.

4. Caulk the wall sleeve to the wall opening on both the
inside and outside perimeter. This can be done from the
inside of the building. Be careful not to plug the weep
holes.

Figure 12. Wall sleeve installation using top angles and eld supplied continuous louver

133⁄4"

(349mm)

11⁄4"

42"

(1069mm)

(406mm)

3" Min.

(76mm)

16"

Optional
Subbase

101⁄2"

(267mm)

Max.

X*

Optional

Top Angle

Turndown
Flange

(See Detail)

1"

(25mm)

Wall

Sleeve

Outside Edge
of Sleeve

Finished Floor
Including Carpet

Notes:

1. Caulk entire perimeter of wall sleeve after installation.

2. Seal area between louver and wall sleeve to prevent condenser air recirculation.

3. Dimensions shown in table on page 6 do not apply to this application.
* Dimension

IM 882 / Page 10 of 36

“X” is eld determined or specied. Angle is factory welded at given dimension when option is designated.

(38mm)

16"

(406mm)

Min. 37⁄8"

(98mm)

Insulated
Panel

Optional

Top Angle

Wall Sleeve

Supports By Others
(2 Req’d.)

Wall

Sleeve

Outside Louver
By Others

Turndown
Flange

Insulated Panel

Wall
Frame

By Others

Resilient
Caulking

(see Note 2)

Resilient
Caulking

(see Note 2)

Wall Sleeve Installation —

Thick Wall Construction

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 multi-pack of 15.
Typical installation for masonry walls is shown in Figure

13. The recommended installation procedure for this type
of construction is as follows:

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

2. Be sure the unit’s center of gravity falls within the load
bearing surface of the wall. The center of gravity for
the unit is approximately 103⁄4" (273mm) from the rear
edge of the wall sleeve. If the center of gravity is not
within the load bearing surface, then additional support
such as wood, metal or concrete must be provided in
the eld.

3. Place a thin pad of soft mortar on the bottom of the
opening. Important: Make certain the wall sleeve
protrudes into the room a minimum of 11⁄8" (29mm)
beyond the nished wall surface to accommodate the
heat section and room cabinet. Be sure to recess the wall
sleeve enough to accommodate outside louver. This
recess is 3/8" (9.5mm) for stamped louvers and 11⁄4"
(32mm) for architectural louvers. The louver should
be ush to exterior surface when completed.

4. If a brickstop is employed (as shown in Figure 5), slide
the wall sleeve into the wall until the brickstop contacts
the exterior bricks, as illustrated below. If a brickstop
is not used, slide the wall sleeve in the wall so that
it extends into the room a minimum of 11⁄8" (29mm)
beyond the nished interior wall surface. This allows
room to attach the heat section and room cabinet. The
wall sleeve should also be recessed enough to accom­modate the outside louver. Level wall sleeve side to
side and pitch to outside 1/8"/ft. to assure proper sleeve

drainage to outside.

5. After the mortar has dried, remove the masonry sup
port from the wall sleeve. Note: The wall sleeve is not
intended to replace the lintel.

6. Anchor with appropriate fasteners (as shown in Figure
15, page 12). A 5/16" (8mm) hole is provided on each
side, 2" (51mm) down from the top and 2" (51mm)
in from the rear of the wall sleeve. It may necessary
to drill additional holes in the wall sleeve to rmly
secure it.

CAUTION

Do not drill holes in the base of the wall sleeve. Use shims

between the wall and the wall sleeve to prevent wall sleeve
distortion during anchoring.

7. Caulk the wall sleeve to the wall opening on both the
in-side and outside perimeter using a resilient, non­hardening caulk such as silicone. Be careful not to
plug the weep holes.

Figure 13. Wall sleeve installation using brickstops

Brick

Optional

Continuous

Flange

Outside

Louver

Exposed Projection
Concrete Slab

Brick

2'-4"

4"

1'-4"

1"

B

Room

Wall Sleeve

D

Casement Window with
Insulating Clear Glass

Cabinet

Wood Stool

A

Figure 14. Standard 16" x 42" wall sleeve with brick
stop

D

X

Optional Brickstops

42"

(1067mm)

-

Wall Sleeve

Outside Edge
of Sleeve

1-1⁄4" (32mm)

Notes:

1. For dimensions

2. Dimension
to be welded during wall sleeve fabrication.

3. Caulk entire perimeter of wall sleeve after installation.

4. Wall sleeve to extend a minimum of 1-1/4" past nished

sheetrock.

5. Wall sleeve should be installed recessed 1-1/4" from face of brick

so that when louver is installed it is ush with face of building.

B and D, see table on page 6.

“X” is “as required” and is usually sent to the factory

2'-61⁄2"

Finished
Floor

7-1⁄4"

16"

(406mm)

IM 882 / Page 11 of 36

Anchoring

Anchoring the wall sleeve in the opening is accomplished
as shown in Figure 15. 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.
A 5⁄16" (8mm) hole is provided on each side, 2" (51mm)
down from the top and 2" (51mm) in from the rear of the
wall sleeve. It may be necessary to drill additional holes
in the wall sleeve to rmly secure it. Caution: Do not drill
holes in the base of the wall sleeve. Use shims between
the wall and the wall sleeve to prevent sleeve distortion

during anchoring.

Figure 15. Anchoring the Wall Sleeve (all anchoring

hardware eld supplied)

Rubber

Isolation

Washer

Expansion

Anchor Bolt

Molly or

Toggle Bolt

Wood

Screw

WARNING

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

Electrical Service

All wiring should be in accordance with all local andNa­tional Electrical Code requirements.
Units are supplied with an attachment cord and plug which
exit from the bottom of the conditioner on the control side.
The cord for 115V, 208V and 230V has a usable length of
72" (1829mm) from where it exits the conditioner. The use
of extension cords to increase the length of the plug/cord
set is not recommended.
The attachment plug size should be used to determine the
circuit ampacity and overcurrent protection. Time delay,
overcurrent protection devices are recommended to pre­vent unit damage and to avoid nuisance tripping.
Outlets are generally located beneath the conditioner, on
or recessed in the wall so it is concealed by the conditioner
overhang and kickplate.

Cooling Chassis Installation

Correct installation of the cooling chassis is extremely
important to insure the proper operation of the unit. Install
the chassis as follows:

Do Not Drill Holes in Bottom of

Sleeve (Except for Internal Drain Kit)

Cripple Stud

Main Stud

Installation of Louvers

1. Remove louver from its shipping carton which
also contains a hardware package for mounting the
louver.

2. Remove outside weather plug and 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. Push 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 cooling chassis is not to be immediately
installed, replace the weather panel.

WARNING

The chassis weighs approximately 150 lbs. Use blocking

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

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

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

3. Remove chassis from carton by pulling evenly on
substantial portion of unit. Caution: Do not pull on
evaporator fan housing, control box or compressor.

CAUTION

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

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

5. Check all fasteners to make certain they have
not come loose during shipment. Do not loosen
nuts holding down compressor; they are set at the
factory.

IM 882 / Page 12 of 36

6. Do not lubricate motors before start-up. Motors are
factory lubricated. Consult “Scheduled Maintenance”
section on page 31 for lubrication instructions.

7. Place Tinnerman clips from bag onto wall sleeve.
Clips and mounting screws are enclosed in a bag
attached to the top of the condenser coil cover.

8. If louver has not been previously installed, connect
to wall sleeve as described above.

9. If louver is supplied by others, as illustrated in
Figure 12, page 10, be sure to install foam type
gaskets on all sides of the condenser coil to prevent
recirculation or bypass of condenser air.

10. Slide chassis into wall sleeve until rmly seated
against weather seals of wall sleeve. Caution: Do
not push on coil surface or control box cover. Make
sure the compressor tubing does not catch when
inserting chassis.

11. Secure chassis to wall sleeve with four (4) sheet
metal screws packaged with the Tinnerman clips.

12. Plug electrical cord into receptacle. Excess cord
should be coiled up neatly and stored in the
conditioner.

13. Set the manual damper operator in open or closed

position as desired. On units equipped with the

optional electric fresh air damper, set for “AU”
or "CL" in the Conguration Mode. In “AU,” the

damper is open whenever the indoor fan motor is

running (AU is Auto and CL is Closed).

14. 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 28 for jumper placement details.

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

16. Replace the air lter and front panel.

17. Connect the low voltage valve wires with the
Molex connection to the valve.

Heat Section Installation

The heat section is designed to be “snapped” into the top
of the wall sleeve (Figure 16). There are four square holes
provided in the wall sleeve, two on each side, for coil at­tachment. Assembly the heat section to the wall sleeve as
follows:

1. Unpack the heat section and inspect for any shipping
damage. Report any damage found to the carrier.

2. Check the heat section against the plans to make certain
the coil supplied has the connections match the specica-

tions.

3. Firmly attach the heat section to the wall sleeve by lining
up the heat section hooks with the square holes supplied
in the wall sleeve. Snap the heat section in place by
exerting pressure downward.

4. The valve is always connected to the supply side of
the coil. There are seven possible coil arrangements
available. Each is shown on the next page. Select the
illustration below that matches the coil supplied and pipe
it according to the illustration. Install valve and other
accessories including air vents, steam traps, stop balance
valves, etc., as specied by the design engineer.

5. For valve installed on right side of the unit, make elec
trical connection to matching cap extending from the
control box. For left side valve, make electrical connec­tion to cap mounted to left side of chassis.
Note: When the heating medium is steam, the supply

connection should be attached to the uppermost tube
and the return to the lower tube. The coil is pitched in the
casing to allow drainage of condensate.

When the heating medium is hot water, the supply

connection should be made to the lowermost tube and
the return to the uppermost tube. Hot water coils
should be “ooded” to minimize air entrapment.

Figure 16. Installing the Cooling Chassis and Hydronic
Heat Section

Hydronic Heat Section

Cooling
Chassis

Factory

Supplied
Holes (2)

Wall Sleeve

Damper
Actuator

-

IM 882 / Page 13 of 36

Installing Room Cabinet

The room cabinet is the last piece to install. The following
instructions assume all components (wall sleeve, heat sec­tion, louver and chassis) have been installed, piped and
anchored. All major room construction should also be
complete so as not to damage the room cabinet after it has
been installed. Attaching the room cabinet can be com­pleted as follows:

1. Firmly grasp the room cabinet and lift it over the
heat section. There are notches in the back anges of
the room cabinet that rest on the wall sleeve to assure
it is centered.

2. Align the notches of the room cabinet on the wall
sleeve and rmly push the cabinet downward until it
seats on the wall sleeve (see Figure 17).

3. Screw the cabinet to the wall using the screws
provided. There are two (2) screw holes provided on
each side located on the inner anges of the room
cabinet.

Supply and Return Coil Arrangements

4. Loosen the four (4) wing nuts on the kickplate and
adjust the kickplate the required distance to the oor.

5. Tighten the wing nuts rmly.

6. Wipe any smudges or dirt off the room cabinet using
a mild cleaner and a soft cloth.

Figure 17. Room Cabinet Detail

Notch on back of cabinet to set
on wall sleeve

Screw slots on back of cabinet for
securing to wall (2-each side)

Steam

Figure 18a. Left-hand supply and return

Supply

Return

Figure 18b. Right-hand supply and return

Figure 18c. Right-hand supply, left-hand return

Return

Supply

Return

Supply

Hot Water

Figure 18e. Left-hand supply and return

Return

Supply

Figure 18f. Right-hand supply and return

Figure 18g. Left-hand supply, right-hand return or
Right-hand supply, left-hand return

Return
or

Supply

Return

Supply

Return
or

Supply

Figure 18d. Left-hand supply, right-hand return

Supply

IM 882 / Page 14 of 36

Return

PDAC/PDHP Digital Control

Figure 19. Digital Control

Display Function Legend (Also see page 34)

Tr = Room Temperature
rT = Remote Thermostat Control
tP = Touchpad Control
t = Time
Ts = Temperature Setpoint
rF = Room Freeze Condition

Figure 20. Digital Control Indicators

LED

2-Digit Display

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

• Indoor Coil Sensor (ICS)

• Indoor Air Sensor (IAS)

• Outdoor Air Sensor (OAS)

• Inputs from Remote Thermostat, RBGYW

• Heat Fan Lock Out Sensor (HFLO)

• Power Supply, 24VAC

Outputs

• Compressor output (COM)

• Outdoor Fan (FAN)

• Indoor Fan (BLOWER HI, BLOWER LO)

• Damper Control (DAMPER)

• Hydronic Valve (HYV)

Keys and Indicators Labels

7 Push Buttons

9 LED Indicators

LED 2 Digit Displays

SLEEP, MODE

ON/OFF, FAN SPEED, FAN MODE,

Temp buttons: Arrow Labels for
Temp UP and DOWN

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

9- LED

Indicators

7- Push Buttons

Wireless Remote Control (Optional)

The Remote Consists of 10 Push-buttons

• Power:

Functions same as ON/OFF button on the touchpad.

• Sleep:

Functions same as SLEEP button on the touchpad.

Mode Buttons

• Heat, Cool, Cool/Dry, Fan:

Performs same function as the MODE button on the
touchpad, and allows user to select specic mode of
operation using only one button.

• Temp Buttons

Functions same as buttons on touch pad, allowing user to
change the setpoint.

+, – :

• Fan Speed Buttons (High & Low):

Performs same function as the FAN SPEED button on
the touchpad, allows user to select specic speed using
only one button.
Remote must be aimed in a line of sight of the window
in upper right corner on the front panel, at less than a 45o
angle from center of the window.
The control board will beep when any button is pressed
on the Remote control to conrm signal.

IM 882 / Page 15 of 36

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 non­volatile memory. Factory set mode is OFF.

On/Off Triggering

Control can be turned On/Off via the Local User
Interface (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.

1. On/Off triggering with LUI

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
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.

protections section

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 Conguration Mode.

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 on the unit control board.

Remote Thermostat Mode

The unit can be jumper congured on the unit control
board 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 unit

control board the work of the compressor, indoor and
outdoor fans, the reversing valve, and the heat
control valve.

2. In Cool mode the compressor and condenser fan

shall turn on when "Y" signal is high.

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

IM 882 / Page 16 of 36

Controls

Standard Digital Touchpad Control

Modes of Operation-Description

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 Premium Digital Control Board Wiring
Diagram on page 29).

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.

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 raise the temperature setting
one degree fahrenheit every half hour for two hours for
a maximum of four degrees. Changing the Mode or a
changeover from Heat to Cool 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 882 / Page 17 of 36

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.

*

Modes of Operation-Description

Standard Digital Touchpad Control

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):

Note: Cool Dry is not available with Sleep Function.

Figure 21. if Tr - Ts > 4°F, operation will be in Zone A
Figure 22. if 2°F < Tr - Ts < 4°F, operation will be in
Zone B
Figure 23. if 0°F < Ts - Ts < 2°F, operation will be in
Zone C
Figure 24. if Ts - Tr > 5°F, operation will be in Zone D
The other temperature ranges are dead bands for zone
stability.

Figure 22. Zone B

Figure 23. Zone C

Figure 21. Zone A

IM 882 / Page 18 of 36

Figure 24. 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 power-on-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.

2) Hot Keep

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

Sleep Function

Sleep time is user adjustable from 1 to 15 hours in
one (1) 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
one degree fahrenheit every half hour for two hours for
a maximum of four degrees. Changing the Mode or a
changeover from Heat to Cool will reset the Sleep Timer.
The Sleep function will be deactivated by Power-on­reset, or by pressing any button on the Touchpad except
Sleep.

Control Board Conguration

To enter the Conguration Mode, simultaneously press
the 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 Conguration Mode, press the Up and Down
buttons simultaneously for 5 seconds or control will
automatically exit in 15 seconds.
Settings within the Conguration Mode are as follows:

Temperature Scale

To view the Temperature Scale Screen, press and hold
the Up and Down buttons for 5 seconds. The temperature
scale will be displayed. The default setting is degrees
fahrenheit and by pressing either the UP or Down button
can toggle to Degree Celcius.

Temperature Limit Settings

To advance from Temperature Scale Setting, 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.

Setting The Outside Air Damper

To view Damper Setting press the Mode button once. To
adjust the damper setting (AU or CL), press the Up or
Down button. AU is the abbreviation for Automatic as
CL is the abbreviation for Closed.

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.

Sensor Readings

By pressing the Mode button repeatedly from the
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

IM 882 / Page 19 of 36

Modes of Operation

Standard Digital Touchpad Control

Indoor Air Sensor Reading

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

Figure 25. Indoor Air and Indoor Coil Sensor Locations

Indoor

Coil Sensor (ICS)

Indoor

Air Sensor (IAS)

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

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 30°F and stays there for at
least ve (5) minutes.

3. The compressor has run for at least 90 seconds.

Figure 26. 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 (see
Fault & Codes table on page 34).

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.

Sleep Timer is overridden during this operation. Anti­freeze Protection is active in all modes of operation and
when the control is Off.

In Anti-freeze Mode, the compressor and outdoor fan
will stop, the indoor fan will continue to run 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.

Room Freeze Protection

When room temperature falls below 41°F, the damper
motor de-energizes, 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 and the damper motor will
resume normal operation 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.

IM 882 / Page 20 of 36

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 conguration settings
for minimum and maximum temperatures.

Incremental® Startup

Report — Audit

Job Name ___________________________________________ City ___________________ G.O. # _________________

Installer _____________________________________________________________________ Total No. of Units_________

UNIT TYPE

Date of Final Inspection and Start-up ____________________________________________

Manufacturers’ Representative Name ____________________________________________

 SuiteII  Type K
 Type EA   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:

___________________________________ SM ____________________

CTS ___________________

DATE

T ______________________

SIGNATURE FOR SALES REPRESENTATIVE

_________________________

SIGNATURE FOR CUSTOMER

FORM No. 13F-1206

SERVICE MANAGER APPROVAL

DATE

IM 882 / Page 21 of 36

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(s) to change airow pattern in a room.

The building superintendent or assistant manager should be
requested to make any changes.

IM 882 / Page 22 of 36

Controls

Premium (Programmable) Digital Touchpad
Control Operating Instructions

LED with Program
Setting Display

9-LED Indicators

Application

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

Inputs

• Indoor coil sensor, (ICS)

• Outdoor coil sensor, (OCS)

• Indoor air sensor, (IAS)

• Outdoor air sensor, (OAS)

• Remote T’stat, T’STAT (RCBYWG)

• 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

Local User Interface (LUI)

The user will congure the Applied PTAC Digital
Control Board via the touchpad. The user can select with
a jumper on the control board to receive commands from
a Remote Thermostat.

8- Push Button

Display Inputs

Keys and Indicators Labels

ON/OFF, FAN SPEED, MODE,

8 Push Buttons
Temp buttons:

Temp UP and for Temp DOWN

9 LED Indicators
HEAT, HIGH, LOW, CYCLE, CONT.

LED 2 Digit Displays No Label

FAN MODE, SLEEP, PROG-ON/OFF

for

SLEEP, COOL, COOL/DRY, FAN,

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 - ON
nL = Control Lockout - OFF

Remote Thermostat Control

The Remote Thermostat can be any thermostat that can
interface with an electronic thermostat via RCBWYG
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 882 / Page 23 of 36

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:

1.2 Adjust the time by pressing and buttons.
By holding pressed or buttons, time will
change in 15 minutes increments or decrements,
respectively. AM and PM will show in rotation.

1.3 By pressing FAN MODE button, move to 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 and buttons
for 5 seconds. Moving from one screen to another and
rolling over is done by pressing Mode button.

2.1 Once in the conguration mode, the default
temperature scale will be displayed as shown
below. Toggle the temperature scale to degree
Celsius by pressing either or button:

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:

2.4 To adjust the upper operating temperature limit
(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).

2.5 By pressing MODE button repeatedly from the
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

IM 882 / Page 24 of 36

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.

3.2 To enter the program menu, press SLEEP ( )

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.

3.4 By pressing or button, the period of the
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.

3.9 Simpleset programming is a convenient method
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.

3.11 After exiting the program mode, select the mode

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 882 / Page 25 of 36

Controls

Remote Wall Mounted Thermostats

Wall mounted thermostats are available for the Applied
PTAC unit in automatic or manual changeover styles.
All include a fan switch for constant “on” operation or
“automatic” for cycle operation with a call for heat or
cooling. 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 “heat-off­cool” switch and fan “on-off” switch.

Figure 27. Non-Programmable Thermostat (107095701)

7-Day Programmable Manual Changeover
Thermostat (107095801)

Simple, logical programming for set-up and set-back
temperatures and times. Compatible with single-stage
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 28. 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: ±1oF

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: ±1oF

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 882 / Page 26 of 36

7-Day Programmable Automatic Changeover
Thermostat (107095901)

Simple, logical programming for set-up and set-back
temperatures and times. Compatible with single-stage
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. Automatically
switches between heating and cooling modes. A/C and
heat pump modes – 4-minute time delay to protect
compressor after it turns off. Vacation hold overrides
programming. Lockout feature prevents unwanted
tampering. Clear backlit display makes it easy to see
time, temperature and setpoint – even in the dark. No
batteries required. Optional remote temperature sensor
available.

Figure 29. 7-Day Programmable Thermostat

(107095901), and optional remote sensor
(107096001)

Thermostat Dimensions – 107095701,
107095801, 107095901

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

Temperature Control Ranges:

• 45oF to 90oF, Accuracy: ±1oF

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 882 / Page 27 of 36

Remote Thermostat Control

The Remote Thermostat can be any thermostat that can
interface with an electronic thermostat via RCBWYG
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 30.
Other considerations for this arrangement are as
follows:

Figure 30. Remote Thermostat With Primary/Secondary Unit Wiring Connections

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 30. 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.

IM 882 / Page 28 of 36

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 SEC (Secondary) to select
Control by a master 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 882 / Page 29 of 36

Wiring Diagrams

Premium (Programmable) Digital Control Board

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

IM 882 / Page 30 of 36

Wiring Diagrams

Premium (Programmable) Digital Control Board with Standby

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

IM 882 / Page 31 of 36

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.

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

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.

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.

IM 882 / Page 32 of 36

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

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.

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.

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 31 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 31. Refrigeration Cycle

45°F. (7°C.)

R22 (Liquid and Gas)

to Evaporator

80°F. (27°C.)

Room Air to Evaporator

Evaporator

Capillary

Restrictor

110°F. (43°C.)

Liquid R22 to

Capillary

120°F. (49°C.) Condenser Air

to Outdoors

Condenser

Cooling Chassis ..........................................................1

Compressor Overload Device ..................................... 1

Compressor Running Capacitor .................................. 1

Evaporator Fan Motor ................................................. 1

Condenser Fan Motor .................................................1

Damper Switch ............................................................ 2

Thermostat ..................................................................2

Control Relay (if used) ................................................ 1

Damper Motor (if used) .............................................. 2

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

For the current spare parts list, and applicable prices, see
your McQuay representative or write McQuay Service,
P.O. Box 1551, Minneapolis, MN 55440.

60°F. (15.5°C.)

Conditioned Air to Room

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)

IM 882 / Page 33 of 36

Fault and Protection Codes for Applied PTAC/PTHP 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 30ºF 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 ≤ 30˚ 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 882 / Page 34 of 36

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 push-button switch
c. Loose connections at push-button switch

a. Thermostat set too high.
b. Heat valve is open and heat is on.
c. Low voltage.

d. Faulty push-button switch.
e. Faulty connection at push-button switch.

f. Defective wiring to thermostat.
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. Defe ctive compres sor motor (short circuited , 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. Faulty push button switch.

b. Open circuited blower motor.

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

e. Loose connection at push-button switch.

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.

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. Replace.
c. Adjust blower motor or blower wheel position.
d. Replace motor
e. Tighten.

-

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

7. Equipment gives electrical shock.

8. Insufcient cooling capacity.

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.

IM 882 / Page 35 of 36

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.

13. Insufcient or no heat.

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. Damper solenoid hums.

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

j. Harmonics.

a. No steam or hot water being applied.
b. No power.

c. Faulty push-button switch.
d. Loose connection at push-button switch.

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.

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. Check for proper adjustment. Apply silicone oil or

grease to gap between solenoid and armature.
g. Tighten.
h. Fasten securely.

i. 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.
j. 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.
d. Replace wire or tighten.
e. Adjust. Rotate knob to “warm.”
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.

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

product information, please go to www.mcquay.com.

©2008 McQuay International • www.mcquay.com • 800-432-1342 IM 882 / Page 36 of 36 (Rev 1-08)