Bulletin illustrations cover the general appearance of McQuay products
at the time of publications and we reserve the right to make changes in
design and construction at any time without notice.
McQuay Applied Packaged Terminal Air Conditioners and Heat Pumps are certied
in accordance with the Packaged Terminal Air-Conditioners certication program which is based on ARI Standard 310
and in accordance with the Packaged Terminal Heat Pump
certication program, which is based on ARI standard 380.
Page 2 of 32 / Catalog 1355-8
Beyond “Standard” Expectations
Sound Comparison
Typical Library
Applied PTAC - Size 012
Cooling Only - Low Speed
Applied PTAC - Size 012
Fan Only - Low Speed
Conversational Speech
Introduction
In 1958, McQuay introduced the Incremental®
system – the rst through-the-wall, self-contained heating and air conditioning system – and set the standard for
reliable, efcient comfort control in multi-story building
applications. With hundreds of thousands of installed
units - many of which have been operating for more than
30 years - McQuay has earned its reputation as one of
the most trusted names in individually-zoned comfort
control.
As one of the world’s largest heating, ventilation and
air-conditioning manufacturers, McQuay stands behind
its products with the strength of a global organization.
And with local McQuay representation and manufactur-
ing facility in Auburn, New York, we can provide you
the hands-on support you need to make your building
project a success.
Modes
• Cooling only mode with hydronic heat
• Cooling only mode with hydronic heat and
supplemental electric heat.
• Top mounted hydronic coil (steam or hot water)
Controls-with built in hydronic logic
• Normally open/normally closed valve control
• Heat fan lockout – prevent the fan from
coming on until there is heat in the pipes.
Customize to suit your needs
Select from a wide variety of features, factory-supplied options and accessories to build the ideal system for
your application and help reduce labor and installation
costs. See "Accessories - Options" on page 18 to 24 for
details on options and accessories.
Quiet Operation
The GentleFlo™ cross-tangential fan wheel design
of Applied PTAC/PTHP units provides whisper quiet
operation while delivering maximum airow required for
proper air circulation. Separate indoor and outdoor fan
motors further reduce operating sound levels and costs.
McQuay Applied Packaged Terminal Air Condi-
tioners and Heat Pumps (Applied PTAC/PTHP) are
manufactured to institutional quality standards at our
ISO 9002 certied manufacturing facility. Strict atten-
tion to manufacturing details—from raw materials to the
unit packaging—gives you a quality product, delivered
on-time to support your construction schedule. Every
unit is ETL Listed, MEA agency approved, ARI certied
for performance and exceeds ASHRAE 90.1 efciency
requirements.
The high design standards and heavy-duty construc-
tion of the McQuay Applied PTAC/PTHP can provide
you with years of reliable service, quieter operation and
low operating costs. In fact, many of our comfort conditioners have been operating for more than 30 years.
The Hydronic Experts
McQuay is a leading manufacturer of hydronic heat
equipment. We specialize in providing hydronic heat
with a host of congurable options.
The heavy gauge construction of the chassis and
cabinet minimizes vibration for quieter operation.
Vibration isolators on the rotary compressor keep it
running smoothly and quietly. The unit bulkhead is fully
insulated to decrease outdoor sound transmission.
Catalog 1355-8 / Page 3 of 32
Beyond “Standard” Expectations
Energy efcient for low operating costs
Applied PTAC/PTHP units are ARI Certied and
built with quality components and exceed industry standards for energy efciency for both new construction and
replacement applications. This helps lower your utility
costs by keeping energy consumption down and may al-
low you to qualify for electrical power company rebates.
Built-in energy management logic comes standard
with the unit’s digital controls. Features such as the Sleep
Function allow users to decrease the set temperature at
night and during unoccupied periods to conserve energy.
For heat pump applications, electric heat comes on only
when the outdoor coil temperature is below 28°F, maxi-
mizing the amount of time the unit operates in the more
efcient heat pump mode.
*Consult your utility provider for rebate opportunities.
Non-Ozone Depleting
R-410A Refrigerant
Standard digital touchpad control
Dehumidication
The cool/dry mode automatically controls humidity
by extending the cool cycle without sacricing comfort
for dehumidication. This mode comes standard with
all units. The desired cooling mode (cool/dry for added
dehumidication or regular cool) can be selected and
locked by the owner or facility manager to meet comfort
and dehumidication requirements.
Constant room temperature monitoring
Units are designed to automatically sample the room
temperature and adjust operation to meet desired temperature set points.
Room Comfort
Easy to use digital controls
The unit control pad offers digital readout and is easy
to use when selecting fan speed, mode of operation and
temperature setting. A precise digital temperature display
provides guests with an exact comfort setting, thereby
eliminating uncomfortable temperature swings and costly
overheating/overcooling associated with non-digital
electromechanical controls.
Built-in Reliability & Durable Construction
High-grade cabinetry
Applied PTAC/PTHP cabinets are constructed of
18-gauge steel with baked on powder coat paint for
maximum durability and aesthetic appeal. Grilles have
two-way adjustment allowing air to be directed where it
is needed.
Positive condensate removal
Our unique three level sloped basepan design provides positive condensate removal to prevent condensate
build-up or overow.
Page 4 of 32 / Catalog 1355-8
Positive condensate
removal
Beyond “Standard” Expectations
Room freeze protection
When the unit senses temperatures of 40°F or lower
in an unoccupied room, the heat mode is automatically
initiated to prevent freezing. The outdoor fan and compressor are stopped and the automatic outdoor air damper
will close to help prevent coil freeze.
Electric heat override
Heat pump units can be manually switched to electric
heat, providing added freeze protection if the heat pump
mode is not available due to a compressor failure.
Compressor protection
The life of the compressor is extended through built
in protection logic such as:
• High temperature protection if the
compressor temperature exceeds 154°F
• Minimum run time
• Minimum off time
• Random restart after a power outage
• Low ambient lockout when the outdoor air
temperature falls below 28°F
Memory recall
Control settings are saved in a non-volatile memory,
allowing the last settings to be recalled after a loss of power.
Seacoast construction
Application of air conditioning equipment in a corrosive environment requires special consideration. The
corrosive nature of salt water vapor, chlorine and acid
vapor, demands a unit that can withstand these environ-
ments. Any metal portion that is exposed to a corrosive
vapor must be specially treated.
There is no coating or treatment that will allow a unit
to last indenitely, however, the Applied PTAC is available with parts that receive special corrosion protection
that can help dramatically extend the life of the unit.
• Condenser Coil – Protected with E-Coating, made
up of an epoxy primer and acrylic top coat that is
electrostatically applied and baked on. Also, there is
a dielectric strip located between the condenser and
base pan.
•
Condenser Fan Blade and Slinger Ring –
Constructed of Noryl® PPO which is a strong engineering plastic that has excellent ame resistance and
dimensional stability over a wide range of service
temperatures. Noryl has low moisture absorption,
excellent strength and stiffness.
• Condenser Fan Motor – Specially coated by the
manufacturer with zinc end plates.
Compressor – Protective coating applied by the
•
manufacturer on the exterior to enhance equipment
life and performance.
• Outdoor Louver – Made of aluminum, etched and
anodized for maximum corrosion protection. Available in stamped or architectural styles.
Easy Installation and Service Design
Quick link connections
Applied PTAC/PTHP units are designed for easy
access with quick link connections to the control box.
The simple slide in/slide out conguration makes it easy
to access the electric heater, indoor and outdoor fans,
motors, and compressor.
Easy fan removal
Easy fan
motor removal
•
Wall Sleeve – The entire Custom Wall Sleeve
(CWS) or cabinet/wall sleeve is constructed of G-60
galvanized, phosphatized, 18-gauge steel. Treated
inside and outside with a baked-on epoxy based
powder coat paint to protect it from the corrosive
effects of salt spray. The Basic Wall Sleeve (BWS)
is constructed of galvanized, primed and pre-painted
antique ivory 18-gauge steel.
•
Base Pan – Protected with Casing Guard coating,
providing a comprehensive corrosion protection for
all exposure conditions.
Easy to read LED diagnostics
Sensors in the unit continually monitor the indoor
coil, outdoor coil, and outdoor air conditions. If abnormal
conditions are detected, an error code is displayed,
removing the guess work in troubleshooting a unit.
Catalog 1355-8 / Page 5 of 32
Unit Features – 16" × 42" Model PDAN with Top-Mounted Hydronic Heat
Complete solution, high efciency and very quiet – ve sizes from 7,000 to 17,000 Btuh
H
A
A. Heavy-Duty Grille
• Two-way adjustment allows air to be directed
where it is needed.
• Option for extruded aluminum grille.
B. Heating Chassis
• Top-mounted hydronic (steam or hot water) heat for
easy installation.
B
C
E
D
Digital Touchpad Control
G
F
C. Room Cabinet
• Heavy-gauge steel with powder paint coating
for maximum scratch and dent resistance.
• Removable for easy access to lters,
controls and piping for routine maintenance and
service.
• Option for custom cabinet colors.
• Custom depth for varying wall thicknesses.
• Available in front or bottom return congurations.
D. Kick Plate
• Adjustable height and custom colors for varying oor
treatments.
E. Digital Touchpad Control
• Reliable and easy to read and operate.
• Continuous or cycle indoor fan operation.
• Automatic room freeze protection.
Page 6 of 32 / Catalog 1355-8
Infrared Remote (Option)
F. Wall Sleeve
• Heavy-gauge steel with powder paint coating for
maximum scratch, dent and corrosion resistance.
• Custom wall sleeve depths available.
• Options for brick or panel/curtain wall applications.
G. Outside Air Louver
• Heavy-duty, architectural, extruded aluminum to
resist weathering.
• Option for recessed louver.
H. Cooling Chassis
• Energy efcient, quiet and reliable rotary compressor.
Unit Features – 16" × 42" Model PDAN with Top-Mounted Hydronic Heat
Permanent Cleanable Filters
Room side return air is ltered through this permanent,
washable polypropylene mesh lter. It is UL listed class
II, 38% average arrestance efciency (ASHRAE test),
with low resistance to airow (0.02 w.g. at 300 cfm), and
high dust holding capacity (55 grams).
• Filters all return air to promote good indoor air quality.
• Easy to access and maintain.
Optional Automatic Motorized Outside Air Damper
• Opens when unit is operating to bring in outside air
for improved indoor air quality.
• Closes when unit is idle to prevent cold drafts. Also,
when in AU mode, the damper will close if the outside air temperature is lower than 40ºF or higher than
90ºF or if the indoor air sensor is lower than 41ºF.
• Touchpad congurable to select damper CLOSED or
AUTO Operation.
Separate Indoor and Outdoor Fans (not shown)
• Two fan motors provide lower operating costs and
quieter operation.
• Provide more exible options for architectural
louvers or special condenser air treatments.
Permanent, washable polypropylene mesh lter
(Shown in front return conguration)
Indoor fan motor
Outdoor fan motor
Fan Motors
• High efciency, quiet PSC type.
• Permanently lubricated for extended life.
• Outdoor fan motor is totally enclosed to help prevent
damage from driving rain or excess condensate
accumulation in humid climates.
Compressor
• Reliable, high efciency R-410A rotary compressor,
hermetically sealed and designed for continuous
operation.
• Unique design provides high efciency and low air
pressure drops.
• Allows for easy cleaning during scheduled
maintenance.
Outdoor coil
Indoor coil
Catalog 1355-8 / Page 7 of 32
Unit Features – 16" × 42" Model PDAN with Top-Mounted Hydronic Heat
Digital Touchpad Control
The PDAC/PDHP Standard Touchpad Control is
used to control both an integral air conditioner and a
source of heat. 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.
Standard (non-programmable) digital touchpad
• Provides 5-selectable modes of operation:
Sleep, Cool, Cool/Dry, Fan, Heat
• Temperature can be displayed in Fahrenheit (default)
or Celsius
LED
2-Digit Display
9- LED
Indicators
7- Push Buttons
Keys and indicators labels
7 Push Buttons
9 LED Indicators
LED 2 Digit Displays No Label
ON/OFF, FAN SPEED, MODE
FAN MODE, SLEEP
Temp buttons: for
Temp UP and for Temp DOWN
SLEEP, COOL, COOL/DRY, FAN,
HEAT, HIGH, LOW, CYCLE, CONT.
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
Inputs and outputs
• Indoor coil sensor, (ICS)
• Outdoor coil sensor, (OCS)
• Indoor air sensor, (IAS)
• Outdoor air sensor, (OAS)
• Remote thermostat, T’STAT (RCBYWG)
• Heat Fan Lock Out, (HFLO)
• 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
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 termi-
nal. 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.
Notes: In terms of outputs, there are two types of
thermostats: relay contacts and solid state.
If you open the thermostat and don’t see relays then it
must be 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.
Page 8 of 32 / Catalog 1355-8
Unit Features – 16" × 42" Model PDAN with Top-Mounted Hydronic Heat
Premium (7-day programmable) Digital
Touchpad
• Provides all the features of the Standard Controller,
plus master/slave, infra-red control, auto damper,
wall mounted remote thermostat, heat fan lockout
LED with
Program
Setting Display
9-LED
Indicators
8- Push Button
Display Inputs
Display inputs
ON/OFFTurn the unit on and off
Increase the temperature set point
Decrease the temperature set point
MODESelect one from the following modes: COOL, COOL/DRY, FAN, or HEAT
FAN MODE Change the mode of fan operation
between CYCLE and CONTINUOUS
Digital Touchpad with Automatic Changeover from
Cooling to Heating & Heating to Cooling
AUTO
Available with the Programmable LUI (668003801)
and Premium Board (667997301) only. The Auto-
Changeover board has a new control set with a touchpad
label that shows, “AUTO”. The Auto Changeover control
provides:
• Auto changeover from heat to cool and vice versa
• LED's from top down that read: Sleep, Cool, Auto,
Fan, and Heat
AUTO Non-Programmable Mode:
• Display shows both HEAT and COOL icons
• Temperature set point displays between the HEAT
and COOL icons
• Setpoint is adjusted with Up and Down arrows
• Heating initiates when the room temperature falls
one degree below the thermostat setpoint. Heating
terminates when the room temperature reaches two
degrees above the setpoint
• Cooling initiates when the room temperature reaches
one degree above the thermostat setpoint. Cooling
terminates when the room temperature falls two
degrees below the setpoint
FAN SPEEDChange the speed of the fan between
HIGH and LOW
SLEEPActivate the sleep mode and set the sleep time
PROG ON/OFF Button to activate and deactivate the program mode
AUTO Programmable Mode:
• HEAT and COOL icons alternatively ash with their
respective programmed setpoints
• The system engages cooling and heating automati
cally to maintain respective setpoints according to
system model selection
• The 2-degree gap between setpoints represents the
deadband and is necessary to prevent unecessary
switching between heating and cooling
The 2 degree deadband provides the following:
• Heating activates when the room temperature is
one degree below the thermostat setpoint plus the 2
degree deadband.
• Cooling activates when the room temperature is
one degree above the thermostat setpoint plus the 2
degree deadband
Catalog 1355-8 / Page 9 of 32
-
Unit Features – 16" × 42" Model PDAN with Top-Mounted Hydronic Heat
Wireless Remote Control (Optional)
Note: Only available on select models.
The remote consists of 10 push-buttons
• Power:
Functions the same as the ON/OFF button on
the touchpad.
• Sleep:
Functions the same as the SLEEP button on the
touchpad.
Mode buttons
• Heat, Cool, Cool/Dry, Fan:
Performs the same function as the MODE button on
the touchpad and allows user to select the specic
mode of operation using only one button.
• Temp buttons +, – :
Functions same as the buttons on the touchpad and
allows the user to change the setpoint.
• Fan speed buttons (high & low):
Performs same function as the FAN SPEED button
on the touchpad and allows user to select the specic
speed using only one button.
The remote must be aimed in a line of sight of the
window in the upper right corner on the front panel, at
less than a 45° angle from center of the window.
Note: The control board will beep when any button is
pressed on the remote control to conrm signal.
Master-Slave (Primary/Secondary)
Control (Optional)
A single master unit can be congured to control up
to 32 slave units. The master unit controls on/off, fan,
settings and sleep functions for the secondary units.
Page 10 of 32 / Catalog 1355-8
McQuay Model PDAN Product Nomenclature
Note: For Illustration purposes only. Not all options available with all models.
Please consult a McQuay Sales Representative for specic availability.
P DAN 2 009 E M A H A B A M A A E
Unit Type
P = PTAC
Product Identier
PDAN = Air Conditioner
Design Series
1 = A Design 1
2 = B Design 2
3 = C Design 3
4 = D Design 4
5 = E Design 5
(1) Based on ASHRAE and ARI test conditions of 95°F DB/75°F WB outside, 80°F DB/67°F WB inside.
(2) Based on ASHRAE and ARI test conditions of 47°F DB outside, 70°F DB inside.
(3) Electric Resistance Heat Watts x 3.41 = Btuh. Electric Heating Watts and Amps include Indoor Fan Motor.
(4) Water – Based on ASHRAE and ARI test conditions of 200°F EWT, 180°F LWT, 70°F EAT with a 1.8 gpm ow rate.
(5) 90 cfm with Power Vent Option.
(6) Cooling Full Load Amps includes Compressor, IDF and ODF FLA's.
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)
7/8"
(22mm)
“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⁄
–113⁄
–123⁄
–133⁄
–143⁄
–153⁄
–173⁄
(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
Catalog 1355-8 / Page 13 of 32
Application Considerations
How to Select The Correct Wall Cabinet
The minimum cabinet depth is 10.75". This is required
because the wall sleeve MUST extend a minimum of
1.625" into the room and 9.125" is required to cover the
chassis. This totals 10.75".
Standard cabinets range from 10.75" to 18.75" in 1"
increments. For other requirements, consult the factory.
If the wall sleeve extends into the room more than
1.625", add the inside measurement to the 9.125"
required to cover the chassis. This will be the depth of
the wall cabinet.
For example:
The wall sleeve extends 3.25" into room + 9.125" =
12.75" deep cabinet or if the wall sleeve extends 9.25"
into room + 9.125" = 18.75" deep cabinet would be the
closest t.
Wall Opening Requirements – 16" × 42"
When roughing in the opening for the wall sleeve,
sufcient clearance from the walls and oor is required.
The wall sleeve should be positioned a minimum of 5/8"
from the nished side 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 161/4" high × 421/4"
wide. When using a louver frame, the opening must measure 165/8" × 425/8". Louver frames should be used for
panel wall and thin wall applications to provide positive
anchoring to the wall.
Wall Construction Examples
Panel Wall (thin)
Steel Studs
Concrete
Pillars
161/4" × 421/4"
Wall Sleeve
Rough Opening or
165/8" × 425/8" When using a
Louver Frame
Masonry Wall (thick)
Room Side
Floor
Lintels (by others)
Electrical Service
All wiring should be in accordance with all local and
National 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. Units to
operate on 265V are supplied with a 18" (457mm) cord
for connection to a subbase.
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.
Receptacles are generally located beneath the conditioner, on or recessed in the wall so it is concealed by the
conditioner overhang and kickplate (see page 17).
Wall Sleeve Extension
Frame and Brick
1
/4" High
16
421/4" Wide Wall
Sleeve Rough Opening
Splitters
16" × 42"
Wall Sleeve
16" × 42"
Wall Sleeve
Lintel
(by others)
Page 14 of 32 / Catalog 1355-8
Application Considerations
Supply and Return Piping
Same End Connections
5"
42"
Left SideRight Side
6.63"
27/8"
Wall Sleeve
37/8"
Steam Supply
Hot Water Supply
Wall Sleeve
Hot Water Return
Steam Return
11/4" Architectural Louver
2"
6.63"
Note: Piping connections are 5 /8" O.D. copper sweat and are symmetrical R.H. or L.H. for same end supply and return.
Opposite End Connections
Hot Water – Opposite End Supply or Return
Steam – Right-hand Supply, left-hand Return
5"
Left SideRight Side
Wall Sleeve
42"
2"
8.63"
Room Cabinet
27/8"
Steam Return, Hot Water Supply
Steam Supply, Hot Water Return
Front Panel
Steam – Left-hand Supply, Right-hand Return
5"
Wall Sleeve
Left SideRight Side
2"
27/8"
Note: Piping connections are 5 /8" O.D. copper sweat and are symmetrical R.H. or L.H. for same end supply and return.
42"
6.63"
27/8"
Catalog 1355-8 / Page 15 of 32
Application Considerations
Typical Installation Types
Standard Wall Sleeve Installation
Masonry Wall Construction Application
Wall Sleeve End View Using Brickstop
4"
“A” “D” “B”
Room Cabinet Wall Sleeve Wall Thickness
183/
(476 mm) 133/
4
173/
(451 mm) 133/
4
163/
(425 mm) 133/
4
153/
(400 mm) 133/
4
143/
(375 mm) 133/
4
133/
(349 mm) 133/
4
123/
(324 mm) 133/
4
113/
(298 mm) 133/
4
103/
(273 mm) 133/
4
103/
(273 mm) 143/
4
103/
(273 mm) 153/
4
103/
(273 mm) 163/
4
103/
(273 mm) 173/
4
(349 mm) 43/4–53/
4
(349 mm) 53/4–63/
4
(349 mm) 63/
4
(349 mm) 73/
4
(349 mm) 83/
4
(349 mm) 93/
4
(349 mm) 103/
4
(349 mm) 113/
4
(349 mm) 123/
4
(375 mm) 133/
4
(400 mm) 143/
4
(425 mm) 153/
4
(451 mm) 163/
4
4
4
4
–103/
4
4
4
4
4
4
4
4
(121–146 mm)
4
(146–171 mm)
4
–73/
(171–197 mm)
4
–83/
(197–222 mm)
4
–93/
(222–248 mm)
4
(248–273 mm)
4
–113/
(273–298 mm)
4
–123/
(298–324 mm)
4
–133/
(324–349 mm)
4
–143/
(349–375 mm)
4
–153/
(375–400 mm)
4
–163/
(400–425 mm)
4
–173/
(425–451 mm)
4
Standard Size Wall Sleeve
B
Wood Stool
A
Brick
Optional Flange
Outside Louver
Exposed Projection
Concrete Slab
Brick
Wall Sleeve
2'-4"
1'-4"
D
1"
Room Cabinet
2'-6
1
/2"
Finished Floor
1
/4"
7-
Casement Window with Insulating Clear Glass
Page 16 of 32 / Catalog 1355-8
Notes:
1. Wall sleeve to extend a minimum of 11/4" past nished sheetrock.
2. Wall sleeve should be installed recessed 11/4" from face of
brick so that when louver is installed it is ush with face of
building.
1. Flange dimension “X” is “as required” and is usually
provided to the factory to be secured to wall sleeve
during fabrication.
2. Dimension "B" is wall thickness (see table on page 16).
3. Given dimensions are standard.
* These are typical but may be adjusted upon request-
by contacting your local McQuay Representative.
NEMA Receptacles
Gr Gr Gr Gr
1-23/8" dia. 13/8" dia. 13/8" dia. 21/8" dia.
7-20R 5-20R 6-20R 6-30R
20 Amp, 265V 20 Amp, 120V 20 Amp, 202V 30 Amp, 250V
Catalog 1355-8 / Page 17 of 32
Accessories–Options
Wall Mounted Thermostats – Quick Selection Guide
Thermostat Item Number 107095701 107095801 107095901
Single Stage
Two Stage •Heat Pump •••Manual Changeover (Cool/Off/Heat) •••Settable Differential Range •Auto Changeover •Status LEDs •Backlit Display ••7-Day Programmable ••Temporary and Vacation Hold ••Programmable Fan On/Off Delay •Non-Programmable •
•••
Hard Wired •••
Wireless
4 or 5 Wire Capable
Freeze Protection •Fan Switch - On/Auto •••Lockout Feature •Fahrenheit or Celsius Display •Remote Sensor Option •Power Loss Memory Protection •••
Anti-Short Cycle Delay
Max/Min. Set Point Control •
Energy Management Interface
California Title 24 Compliant
•••
•••
•••
Page 18 of 32 / Catalog 1355-8
Accessories–Options
Remote Wall Mounted Thermostats
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 tem-
perature.
Notes: In terms of outputs, there are two types of
thermostats: relay contacts and solid state.
If you open the thermostat and don’t see relays then it
must be 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.
Remote Mounted Thermostat Installation
Considerations when units are furnished with remote
mounted thermostats:
1. When wiring the low voltage plug and receptacle
disconnect, provide enough wire to move harness
out of the way for chassis removal.
2. To allow Primary (Master)/Secondary (Slave)
operation, the Primary board Thermostat jumper
must be in the "T-stat" position and the Secondary
boards must be in the "Sec" position.
If secondary units are to be employed, see
connections in wiring illustration below. The number
of secondary units that can be connected is limited to
32 units.
3. When using a programmable wall thermostat,
connect it to the terminal board remote thermostat
plug. Refer to the instructions furnished with the
chosen thermostat.
Thermostat wiring connections for Primary/Secondary wiring
Catalog 1355-8 / Page 19 of 32
Accessories–Options
Wall Mounted, Non-programmable Thermostat
Manual changeover one-stage heat and cool or
one-stage heat pump
McQuay Part No. 107095701 (1-Pk, White with Wall Plate)
Features and benets
• Hardwired
• Simple operation
• Large LCD display
• No batteries required
• A/C compressor protection - 5-minute time delay to
protect compressor after it turns off
• Single stage heat pump
• Freeze protection feature
• Zone capatible
• 4- or 5-wire compatible (C is optional for non-heat
pump systems)
• Manual Changeover
Specications
Electrical rating:
• 24 VAC (18 to 30 VAC)
• 1 amp maximum per terminal
• 3 amp maximum total load
• 30-minute power loss memory retention
Temperature control ranges:
• 45°F to 90°F, Accuracy: ± 1°F
System congurations:
• 1 stage heat, 1 stage cool or single stage electric
heat pump
Terminations:
• R, C, W, Y, O, B, G
Wall Mounted, 7-day Programmable
Thermostat
Manual changeover one-stage heat and cool or
one-stage heat pump
McQuay Part No. 107095801 (1-Pk, White with Wall Plate)
Features and benets
• SimplesetTM logical programming for set-up and
set- back temperatures and times
• Simpleset
day’s programming for the entire week
• Programmable fan to circulate air during any program setting.
• Vacation hold overrides programming
• Enables separate morning, day, evening, and night
settings for every day of the week
• Clear, backlit display makes it easy to see time, temperature, and setpoint – even in the dark
• A/C and heat pump modes – 4-minute time delay to
protect compressor after it turns off
• Lockout feature prevents unwanted tampering
• Manual Changeover
Specications
Electrical Rating:
• 24 VAC (18 to 30 VAC)
• 1 amp maximum per terminal
• 3 amp maximum total load
• 30-minute power loss memory retention
• Easy access terminal block
Temperature control ranges:
• 45°F to 90°F, Accuracy: ± 1°F
System congurations:
• 1 stage heat, 1 stage cool or single stage electric heat pump
TM
feature enables easy copying of one
Page 20 of 32 / Catalog 1355-8
Terminations:
• RC, RH, C, W, Y, O, B, G
Accessories–Options
Wall Mounted, 7-day Programmable
Thermostat
Standard auto or manual changeover two stage
heat / two stage cool
McQuay Part No. 107095901 (1-Pk, White with Wall Plate)
Features and benets
• SimplesetTM logical programming for set-up and
set-back temperatures and times
• Simpleset
day’s programming for the entire week
• Programmable fan to circulate air during any program setting.
• Vacation hold overrides programming
• Enables separate morning, day, evening, and
night settings for every day of the week
• Clear, backlit display makes it easy to see time, temperature, and setpoint — even in the dark
• Automatically switches between heating and cooling modes
• A/C and heat pump modes – 4-minute
time delay to protect compressor after it turns off
• Lockout feature prevents unwanted tampering
• Optional remote temperature sensor available
TM
feature enables easy copying of one
Optional Remote Sensor
Part No. 667720401
The fast, easy solution for temperature sensing
problems.
• For tamper prone areas
• Poor airow areas
• Troubled applications
• Foam gasket prevents drafts through wall opening
• Mounts to standard 2" × 4" outlet box
3
/4"W × 41/2"H
• 2
Wireless Temperature Control (T9000)
The T9000 Wireless Temperature Control is designed
to provide precision temperature control without the
installation labor and expense of wiring.
• Powered by AA batteries
• Mounts in any suitable location that will provide
good temperature control.
• Large LCD display provides the user with
current room temperature, set point temperature,
time, program interval, and other system status
information.
Programmable Non-programmable
Specications
Electrical rating:
• 24 VAC (18 to 30 VAC)
• 1 amp maximum per terminal
• 4 amp maximum total load
• 30-minute power loss memory retention
• Easy access terminal block
Temperature control ranges:
• 45°F to 90°F, Accuracy: ± 1°F
System congurations:
• Single or two-stage heat/cool
• Single or two-stage heat pump
Terminations:
• R, C, W1/O/B, Y1, W2, Y2, G
Remote Control Node (RCN)
Used with the Wireless Temperature Control, the
RCN interfaces with specic HVAC equipment, and
communicates with its thermostat using unlicensed 900
MHz, radio frequency energy. Contact your local McQuay Representative for details.
Catalog 1355-8 / Page 21 of 32
Accessories–Options
Wall Sleeves
Constructed of galvanized, phosphatized, heavygauge steel with an Antique Ivory powder paint corrosion-resistant nish. Wall sleeves are installed through
the wall as shown on the plans and have factory provisions for use of appropriate fastening devices to secure
the sleeve to the wall. They can be ordered to custom
depths, and recessed louver wall sleeves have a pitched
bottom for positive removal of moisture to the outside.
An optional factory-welded brickstop ange is provided
based on architectural specications.
Standard Wall Sleeve with Optional Leveling Legs
and Wall Flange
Brickstop Flange
Exterior Louvers For Standard Wall Sleeves
Two styles of exterior louvers are available. The
standard ush stamped louver is a one-piece stamped
aluminum type that is nished natural and clear anodized. Attractive, rugged architectural louvers are extruded
aluminum and are nished natural and clear anodized
(optional colors are also available).
Louvers by others are acceptable as long as they
meet factory specications. 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.
Flush Stamped Louver
Architectural Louver
Wall Sleeve with Recessed Louver Design
Custom Depths
Page 22 of 32 / Catalog 1355-8
Pitched Bottom
Notes:
1. Optional stamped aluminum louver, or architectural
extruded aluminum louver for standard wall sleeves.
2. Knockouts are provided in stamped louver for
clearance of external drain for heat pump (both sides).
3. Either louver can be installed from inside the building.
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
• Outdoor louvers by others unless approved by the
factory
Wall Sleeve Extension – 16" × 42" PDAN
The standard wall sleeve will accommodate the
maximum wall thickness described in Table 2. For
thicker walls, wall sleeve extensions are available from
your local distributor. Air splitters will be included in the
wall sleeve extension as shown in the illustrations below.
Note:
When installing a new chassis into an existing wall
sleeve with an extension, it will be necessary to relocate
the two air splitters to match the dimensions shown in
the illustration (see Table 3).
16" × 42" PDAN Unit
Table 2. Maximum Wall Thickness without Sleeve Extensions
Louver frames should be used for panel wall and thin
wall applications to assure positive anchoring to the wall.
The cabinet/wall sleeve is installed ush with the outside
of the building. The louver frame is placed around the
cabinet/wall sleeve.
183/16"
(1072mm)
423/16"
(1072mm)
3
/16"
16
(411mm)
33/4"
(92mm)
443/16"
(1122mm)
as required
16"
B
Room Side
42"
Air Splitters
B
C
Wall Sleeve Extension
A
Note: Wall Sleeve rough opening when using a Louver
Frame must be 165/8" × 425/8"
Catalog 1355-8 / Page 23 of 32
Accessories–Options
Energy Saving Options
Automatic Change over, Remote Mounted Thermostat
Thermostats can be obtained to switch from heating to
cooling and from cooling to heating automatically. With
automatic change over, the operation of the heating cycle
or the cooling cycle is determined by the temperature re-
quirement of the space. Most thermostats with this feature
are set to change over when the room temperature varies
3-1/2oF from the set-point. The unit is placed in the cooling
mode when the set-point is over 3-1/2oF; 3-1/2oF under the
set point places the unit in the heating mode. This 3-1/2oF
variation is usually adjustable from a 1/2oF dead band to
a 5oF dead band. Each cycle is run until the set point tem-
perature is reached, then that cycle is de-energized. On
some thermostats, the automatic change over function can
be overridden manually by moving the thermostat selector
switch to “heat” or to “cool.”
The fan operation, with an automatic change over
thermostat, is controlled by the fan selector switch. When
placed in the “fan” mode, the fan runs continuously. When
placed in the “auto” mode, the fan will only energize when
the thermostat calls for heating or cooling.
• Program Setback Control
With the Programmable Touchpad, four (4) different
periods, Morn., Day, Eve., or Nite, can be independently programmed for start time, Heat setting and
Cool setting. There are additional energy savings
with Programmed Setback Control.
• Fresh Air Dampers
McQuay Packaged Terminal conditioners can be
furnished with an automatic fresh air damper in lieu
of a manual fresh air damper. The automatic damper
is wired in parallel to the indoor fan relay.
In the Set-up menu on the touchpad, with the damper
set to “AU” (Automatic) and the OAS (Outdoor Air
Sensor) is > (greater than) 40º F but is < (less than)
90º F and the IAS (Indoor Air Sensor) is > (greater
than) 41º F and if the unit is placed in the cycle
mode, the fan and damper cycle as the thermostat
cycles. If the unit is placed in the “constant” mode,
the fan runs continuously and the damper is always
open subject to the sensors.
The automatic damper feature can be overridden in
the Set-up menu by placing the automatic damper
setting in the “CL” (Closed) position. In this position, the damper remains closed during all cycles of
the unit.
• Special Paint
The Standard paint on the NYC Style unit is Antique
Ivory with a contrasting Oxford Brown subbase. This
color combination blends well with the most interior
color schemes. A durable electrostatically applied,
baked on, antique ivory urethane powder paint is
used that resists smudges and corrosion. Each steel
component is painted separately and oven baked for
durability.
Page 24 of 32 / Catalog 1355-8
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.
Catalog 1355-8 / Page 25 of 32
Wiring Diagrams
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.
Page 26 of 32 / Catalog 1355-8
Engineering Guide Specications – 16" × 42" Model PDAN with Top-Mounted Hydronic Heat
Furnish and install where shown on plans packaged terminal air conditioners of the sizes and capacities shown on the schedule.
The units shall be located as shown on the drawings and shall include cabinet/wall sleeve, chassis, outdoor louver, hydronic heat
section, valve, and room cabinet. All units shall be ETL. listed for safety and ARI certied for performance. Overall dimensions for
the basic unit shall not exceed 52" wide, 22-1/2" high, and 17-3/4" deep. Overall dimensions of the wall sleeve shall be 16" high,
42" wide and (13-3/4"/______) deep. All units shall operate on ______ volts, 60 Hz, 1 phase power. (Units furnished with hydronic
heat shall not exceed 43" wide, 241/2" high and 20" deep).
The minimum energy efciency ratio (EER) in BTU per hour per watt for each PDAN unit must be in compliance with
ASHRAE 90.1 replacement or new construction criteria, for all sizes using R-410A Refrigerant. The minimum COP for heat pumps,
at 47°F DB outdoor, must be 2.9 for all sizes.
Heating/Cooling chassis – Chassis shall be slide-in, plug-in type with a self-contained, hermetically sealed refrigerant circuit.
All chassis sheet metal parts shall be constructed of either powder-coated A-60 or G-60 galvanized steel for maximum corrosion
resistance. The chassis shall consist of the following components:
Vibration isolated compressor; ried copper tubed evaporator and condenser coils with high efciency raised lance aluminum plate
ns mechanically expanded to the tubes for maximum heat transfer; and a capillary restrictor type refrigerant metering device. Coils
shall be factory tested at 300 psig. (Heat pump models shall also include reversing valve and charge balancing device). A positive
closing (manual) fresh air damper may be located within the chassis to provide fresh air during fan operation.
Airow system shall include separate fan motors for the condenser and evaporator sections. The condenser fan motor shall be a
single-speed, totally enclosed, permanently lubricated fan motor. Condenser fan shall be propeller-type with a slinger ring and shall
be constructed of aluminum. The indoor fan motor shall be a two-speed, totally enclosed; permanently lubricated fan motor must be
positioned on the indoor side of the bulkhead so as to be completely within the conditioned, ltered airstream. The indoor blower
fan shall be a forward-curved tangential design to provide even airow across the evaporator coil.
During the cooling cycle:
The compressor, the outdoor fan motor and the indoor fan motor shall be energized. Condensation accumulated on the evaporator
coil shall be drained into the outdoor section where it is to be picked up by the condenser fan/slinger ring and evaporated against the
outdoor coil. In the cool mode, the compressor will cut in if the space temperature is at least 1°F above the thermostat set point and
will cut out when the space temperature is approximately 2°F below set point, subject to timing protections.
During the heating cycle:
Electric Resistance Heat – Control will call for electric heat when the space temperature is 1°F lower that the set point. The
control will cease its call when the space temperature is 3°F or higher than set point.
Only the indoor fan motor and electric resistance heater are energized. The outdoor condenser fan motor and compressor shall not be
energized. Heater shall be open wire type with quick response and high limit cutout. Heaters shall be sized to meet heating requirements as shown on the schedule. Electric resistance heaters must be placed behind the indoor evaporator coil and must not be visible
through the indoor discharge grille. When the heater cuts out the indoor fan continues to run for 15 seconds at the set speed, regardless of On or Off mode. After 15 seconds the fan will stop running if unit is in Off mode, else the fan operation will depend on Fan
Continuous or Fan Cycle setting.
Hydronic, Hot water or Steam, heat – Only the indoor fan motor, the (normally open) (normally closed) valve and automatic fresh
air damper shall be energized. The outdoor condenser fan motor and compressor shall not be energized.
Hydronic Heat
When the control is in the heat mode and calling for heat, the indoor fan shall not turn on until the HFLO sensor is above 115°F. If at
any time while the unit is in heat mode the HFLO sensor is below 95°F, the indoor fan shall turn off immediately. Control will check
if the HFLO sensor temperature is above 115°F for 2 seconds before resuming indoor fan operation.
Hydronic with Intermediate Electric heat – Upon the call for heating and thereafter the HFLO sensor temperature will be
monitored. A trend in HFLO sensor Temperature shall determine which form of heat is to be used. If during the 90 seconds that
Hydronic is the heat source and the HFLO sensor is above 105°F and is increasing at 2°F per minute then Hydronic is the heat
source. If during this 90 seconds, the temperature of the HFLO sensor is above 105°F and is not increasing at 2°F per minute then
Electric is the heat source. The hydronic valve is opened for 90 seconds. After 90 seconds whether Hydronic or Electric provides the
heating is determined by the following:
If HFLO sensor temperature is less that 105°F, Electric provides the heat.
If HFLO sensor temperature is greater than 115°F, Hydronic provides the heat
Catalog 1355-8 / Page 27 of 32
Engineering Guide Specications – 16" × 42" Model PDAN with Top-Mounted Hydronic Heat
Reverse Cycle Heat Pump with back-up electric heat – The reversing valve, the compressor, the outdoor condenser fan
motor and the indoor fan motor shall be energized. Reverse cycle heating shall occur when the outdoor coil temperature is 28°F and
above. If outdoor coil temperature drops below 28°F or the Outdoor air temperature drops to 35°F or less, Electric heat is the only
source of heat. When the Outdoor coil temperature raises back to 40°F and above, then the Compressor or Electric heater is used.
A temperature-sensing device shall be used to monitor the outdoor coil temperature to limit frost buildup. Defrosting of the outdoor
coil will be activated when outdoor coil temperature drops below 28°F or outdoor air temperature drops to 35°F or less. Defrosting
is terminated when outdoor coil temperature rises back to 40°F. During defrosting, both compressor and the outdoor fan are turned
off. The indoor fan will run at its set speed.
Condensation accumulated during reverse cycle heating must NOT be evaporated against the indoor coil so as to prevent contamination of the indoor air with pollutants and odors. Condensation must be disposed of using a (external) (internal) drain system as
shown on plans.
Reverse Cycle Heat Pump without back-up electric heat – The reversing valve, the compressor, the outdoor condenser fan motor
and the indoor fan motor shall be energized. Reverse cycle heating shall occur when the outdoor temperatures are 35°F and above.
If outdoor coil temperature drops below 28°F or the Outdoor air temperature drops to 35°F or less, the compressor stops and there is
no source of heat. When the Outdoor coil temperature raises back to 40°F and above, then the compressor reverse cycle is the heat
source.
A temperature-sensing device shall be used to monitor the outdoor coil temperature to limit frost buildup. Defrosting of the outdoor
coil will be activated when outdoor coil temperature drops below 28°F of outdoor air temperature drops to 35°F or less. Defrosting
is terminated when outdoor coil temperature rises back to 40°F. During defrosting, both compressor and the outdoor fan are turned
off.
The indoor fan will stop if indoor coil temperature falls below 78°F. It will restart at its set speed when indoor coil temperature rises
back to 80°F.
Condensation accumulated during reverse cycle heating must NOT be evaporated against the indoor coil so as to prevent contamination of the indoor air with pollutants and odors. Condensation must be disposed of using a (external) (internal) drain system as
shown on plans.
Electric heat override – Heat pump units can be manually switched to electric heat, providing added freeze protection if the heat
pump mode is not available due to a compressor failure.
Control module – The PDAN Control module is used to control a PDAN unit that includes both an integral air
conditioner and a source of heat. The Digital Control is operated with a Touchpad, IR Remote or 24 volt, Wall Mounted
Thermostat.
Room freeze protection – When the unit senses temperatures of 40°F or lower in an unoccupied room, the heat mode
is automatically initiated to prevent freezing. The outdoor fan and compressor are stopped to help prevent coil freeze.
Compressor protection – The life of the compressor is extended through built in protection logic such as:
• High temperature protection if the compressor temperature exceeds 154°F
• Minimum run time
• Minimum off time
• Random restart after a power outage
• Low ambient lockout when the outdoor air temperature falls below 35°F
Page 28 of 32 / Catalog 1355-8
Engineering Guide Specications – 16" × 42" Model PDAN with Top-Mounted Hydronic Heat
Inputs and outputs
The PDAC/HP control module offers the following inputs:
1. Indoor Coil Sensor (ICS)
2. Indoor Air Sensor (IAS)
3. Outdoor Air Sensor (OAS)
4. Inputs from Remote Thermostat (R, B, G, Y, W)
5. Heat Fan Lock Out Sensor (HFLO)
6. Power Supply, 24VAC
The PDAC/HP control module offers the following outputs:
1. Compressor Output (COM)
2. Outdoor Fan (FAN)
3. Indoor Fan Fan cycle or Fan Continuous and Blower Hi or Blower Lo shall be incorporated to allow either continuous or
automatic fan cycle operation at the selected fan speed. When choosing automatic fan cycle operation, the fan shall be
energized only when the compressor or electric resistance heaters are energized.
4. Damper Control (DAMPER)
5. Hydronic Valve (HYV)
Digital Control – Shall have solid state digital control operated via a unit mounted touchpad, handheld infra-red or remote wall
mounted thermostat. Shall include space temperature control and unit ON or OFF, and the following:
Cooling – Compressor and Outdoor fan, Indoor fan – HI, LOW, CONSTANT or FAN CYCLE, Outdoor air damper.
Heating – Hydronic Valve or Intermediate Electric Heat, Indoor fan – HI, LOW, CONSTANT or FAN CYCLE, Outdoor air damper.
Room Cabinet – Shall be at top, wrap-around design with a heavy-gauge sheet metal front panel that is phosphatized and coated
with a baked on, corrosion resistant nish. Room cabinets with ordinary enamel nish are not acceptable. Discharge grilles shall be
tamper-proof. The control access door shall be mounted on the right-hand side.
Fresh Air Damper – A positive closing automatic fresh air damper must be located within the chassis to provide fresh air during fan
operation. It will be congurable for selection of AUTO operation or CLOSED.
Filtration (Standard) – Room side return air shall be completely ltered through a permanent, washable polypropylene mesh
lter. Foam type lters are not acceptable. Filter must be a UL listed class II, 38% average arrestance efciency (ASHRAE test) air
lter with low resistance to airow (0.02 w.g. at 300 CFM) and high dust holding capacity of 55 grams.
Filtration (Optional) – Room side return air shall be completely ltered through a permanent, washable polypropylene mesh
lter. Foam type lters are not acceptable. Filter must be a UL listed class II, 72% average arrestance efciency (ASHRAE test) air
lter with low resistance to airow (0.03 w.g. at 300 CFM) and high dust holding capacity of 100 grams.
Wall Sleeve – Shall be entirely constructed of galvanized, phosphatized, heavy-gauge steel with an Antique Ivory powder paint cor-
rosion resistant nish. Unpainted, galvanized steel wall sleeves with or without rust inhibiting spray are not acceptable. Wall sleeves
with ordinary enamel nish are not acceptable. Wall sleeves shall be installed through the wall as shown on plans and shall have
factory provisions for use of appropriate fastening devices to secure sleeve to the wall. In no event shall fasteners be installed
through the basepan in the bottom of the cabinet/wall sleeve.
Outside Air Louvers – Shall be (stamped) (architectural) anodized aluminum as shown on plans. Louver shall be (nished natural)
(painted) as shown on the schedule. Louvers shall be easily installed from the inside of the building after the cabinet/wall sleeve
has been installed. Special eld fabricated louvers must be approved by the PTAC manufacturer as to free area and air circulation
requirements.
Catalog 1355-8 / Page 29 of 32
Warranty
All McQuay equipment is sold pursuant to its standard terms and conditions of sale, including Limited Product Warranty. Consult your local McQuay Representative for warranty details. Refer to Form
933-43285Y. To find your local McQuay Representative, go to www.mcquay.com.
This document contains the most current product information as of this printing. For the most up-to-date
product information, please go to www.mcquay.com.
Products Manufactured in an ISO Certified Facility.