Applied Packaged Terminal Air Conditioner and Heat Pump

Installation & Maintenance Data
IM 960-1
Group: PTAC
Date: October 2009
Part Number: 106862802
Applied Packaged Terminal Air Conditioner and Heat Pump
Model PDAF & PDHF Dual Motor Flat Top Unit - 16" x 42" with R-410A Refrigerant
®
©2009 McQuay International
Table of Contents
Safety Information........................................................3
Inspection......................................................................3
Nomenclature................................................................4
Introduction...................................................................5
Dimensional Data........................................................6
Wall Opening Requirements...................................7
Wall Construction Types........................................7
Installation of Subbase .......................................8 & 9
Electric Subbase.....................................................8
Hydronic Subbase .................................................9
Optional Condensate Drain Kit.....................................9
Installation of Condensate Drain Kit......................10
Installation of Wall Sleeve........................................ 11
Considerations...................................................... 11
Wall Sleeve Extension for Thick Wall Construction Types............................................... 11
Installation of Wall Sleeve Extension................... 11
Installation of Louver Frame for Thin
Wall Construction Types...................................... 11
Installation of Recessed Louver Wall Sleeve..........12
Installation Requirements for Recessed
Louver Wall Sleeve.............................................12
Anchoring the Wall Sleeve...................................13
Attaching Cabinet Wall Sleeve to Subbase..........13
Installation of Basic Wall Sleeve..............................13
Frame & Brick Wall Construction Type...............13
Panel Wall Construction Type.....................14 & 15
Attaching Cabinet Wall Sleeve to Subbase..........15
Thick Wall Construction Type..............................16
Attaching Cabinet Wall Sleeve to Subbase..........17
Outdoor Louvers...............................................17 &18
Typical Louver Design.........................................18
Installation of Louver...............................................18
Installation of Chassis..........................................18-19
Unit Service with ExtendAire Installed..................20
Controls ...............................................................21-33
Standard Digital Touchpad Control Operation.....21
Standard Digital Touchpad Control
Modes of Operation.........................................23-27
PTAC/PTHP Startup Report – Audit......................28
Premium (Programmable) Digital
Touchpad Control Operating Instructions.......29-32
Digital Touchpad with Automatic Changeover from Cooling to Heating & Heating to Cooling............30
Wireless Remote Control (Option).......................31
Remote Wall Mounted Thermostats.....................33
Wiring Diagrams..................................................34-39
Remote Thermostat With Secondary Units
Wiring Connections..............................................34
Premium (Programmable)
Digital Control......................................................35
Standard (Non-programmable)
Digital Control Wiring Diagram...........................36
Premium (Programmable)
Digital Control Board...........................................37
Standard (Non-programmable)
Digital Control Board...........................................38
Premium (Programmable)
Digital Control Board with Standby.....................38
Standard (Non-programmable)
Digital Control Board with Standby.....................39
Scheduled Maintenance..............................................40
Recommended Spare Parts.........................................41 Refrigeration Cycle . ..................................................41
Faults and Protection Codes for
PDAF/PDHF Control Board.......................................42
Solid State Digital Controls–LUI Display Codes.......43
Troubleshooting Chart...........................................43-44
Approximate Shipping Weights..................................45
Now that you have made an investment in modern, efficient 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 540-248-0711 and ask for the Training Department.
Safety Information
Follow all safety codes. Wear safety glasses and
work gloves. Use a quenching cloth for brazing
operations. Have a fire 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 identifies 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 identifies
unsafe practices that can result in personal injury or
product and property damage.
Improper installation, adjustment, service,
maintenance, or use can cause explosion, fire,
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 qualified 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
fill out a carrier Inspection Report. The McQuay Inc.
Traffic Department should then be contacted. The unit
nameplate should be checked to make sure the voltage
agrees with the power supply available.
A complete unit consists of the following
components, ordered and shipped separately.
1.
2.
3.
4. 5.
6.
7.
Heating/Cooling Chassis and Cabinet or Front Panel.
Wall Sleeve.
Outdoor Louver.
Subbase – Optional for 208V and 230V units but mandatory for all 265V.
Fixed heater with factory installed power cord.
Electrical receptacle – Required for 208V and 230V units, mandatory for all 265V and Hydronic units.
Plug cord cover – Optional for 208V and 230V units but mandatory for all 265V.
IMPORTANT
This product was carefully packed and thoroughly
inspected before leaving the factory. Responsibility
for its safe delivery was assumed by the carrier upon
acceptance of the shipment. Claims for loss or damage
sustained in transit must therefore be made upon the
carrier as follows:
VISIBLE LOSS OR DAMAGE
Any external evidence of loss or damage must be noted
on the freight bill or carrier’s receipt, and signed by the
carrier’s agent. Failure to adequately describe such
external evidence of loss or damage may result in the
carrier’s refusal to honor a damage claim. The form
required to file 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 fifteen (15) days of the delivery
date. File a claim with the carrier since such damage is
the carrier’s responsibility.
IM 960-1 Applied PTAC / Page of 48
McQuay Model PDAF/PDHF Product Nomenclature
Note: For Illustration purposes only. Not all options available with all models.
Please consult a McQuay Sales Representative for specific availability.
P DAF 2 009 E M A
H
A
B
C
M A A E
Unit Type
Warranty
A = Standard
E = Extended
X =Special
P = PTAC
Product Identifier
PDAF = Air conditioner - Flat top
PDHF = Heat pump - Flat top
Design Series
SKU
A = Stock
B = Build to Order
1 = A Design 1
2 = B Design 2
3 = C Design 3
4 = D Design 4
5 = E Design 5
Unit Size
Upgrade Packages
S = Seacoast
Y = None
007 = 7,000
009 = 9,000
012 = 12,000
015 = 15,000
017 = 17,000 (Cooling Only)
Power Connection
Voltage
L = Long Cord – 72" (Standard)
S - Short Cord – 30" (Optional)
30" Cord, Standard w/Hydronic
Subbase
Y = None
A = 115-60-1
E = 208/230-60-1
J = 265/277-60-1
P = 208/230-60-1 w/stndy 115-60-1
R = 265-60-1 w/stndy 115-60-1
T = 208/208-60-1
Room Interface
Brand Name
Cabinet Type
C = Standard Flat Top 16" x 42"
M = McQuay
Refrigerant
Controls
A = R-410A
Control Board Type
B = Basic Control
P = Premium Controls
(Req'd for Hydronic Heat)
User Interface Type
P = Programmable
A = Programmable with Auto Changeover
(Unit Mtd. Touchpad)
N = Non-Programmable
(Unit Mtd. Touchpad)
Y = None (Wall Stat with Blank-off Plate)
Heating Type
E = Electric Heat
H = Hydronic
A = Hydronic w/Intermediate Electric
Y = None (PDHF only)
Electric Heat
A = 2.5 Kw
B = 3.5 Kw
C = 5.0 Kw
Y = None
Hydronic Heat Type
T = Steam Subbase (Normally Closed)
J = Hot Water Subbase (Normally Open)
Y = None
IM 960-1 Applied PTAC / Page of 48
Damper Type
Damper Control
A = Automatic (Required for Hydronic Heating Subbase)
A = Fresh Air Boost Fan
M = Manual
Y = No Damper
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 benefit from the long life, reliability,
and low sound levels, along with higher energy
efficiencies 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-the-wall installation in either new or
existing buildings. The self-contained refrigerant
system delivers cooling to the desired space. Heating
can be accomplished with electric resistance, with
hydronic (water or steam), hydronic with intermediate
electric resistance or with reverse cycle technology
(heat pump models only). Generally, an estimate for
capacity selection is 35 BTUH per square foot of floor
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.
Figure 1. Model PDAF/PDHF Unit with Touchpad
Control (Shown with Hydronic Subbase)
Notes:
1. Unit pictured with subbase installed. Subbase is
optional on 208V 230V units Subbase is required
on all 265V and units with hydronic heat. See
pages 8 & 9 for subbase dimensions. Sides are
adjustable.
2. Opening needs to be 165/8" (422mm) x 425/8"
(1083mm) when using a louver frame. See page
11, Figure 13.
Figure 2. Exploded View of the Applied PDAF/PDHF Flat Top Unit
IM 960-1 Applied PTAC / Page of 48
Dimensional Data
Figure 3. Chassis Dimensions
523/32"
(145mm)
42" (1067mm)
24" (610mm)
101/32" (255mm)
Wall Sleeve
Top View
211/8"
(537mm)
Wall Sleeve
161/64"
(407mm)
179/16"
(446mm)
285/8" (727mm)
Fin Width
Right End View without Wall Sleeve
Front View
Figure 4. PDAF/PDHF Cabinet with Wall Sleeve Dimensions
42" (1067mm)
43" (1092mm)
Top View
93/4"
(248mm)
133/4"
(349mm)
16"
(406mm)
Front View
11/8" (29mm) Architectural Louver
3/8" (10mm) Stamped Louver
Right End View
IM 960-1 Applied PTAC / Page of 48
Wall Opening Requirements
When roughing in the opening for the wall sleeve,
make certain there is sufficient clearance from the
walls and floor. The wall sleeve should be positioned
a minimum of 5/8" in from the room side finished
wall to accommodate the room cabinet. A minimum
distance of 3" above the finished floor is required for
return air.
The rough opening should measure 161/4" high x
1
42 /4" wide. 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 13). When a
elecrical subbase is used, the opening must start 3"
to 4" above the finished floor (including carpeting) to
match the height of the subbase selected. The subbase
is available in 3" or 4" heights and has adjustable
leveling legs that provide up to an additional 1" height.
A 3" or 4" subbase is required for 265V models and
is optional for 208/230V models.
Figure 6. Masonry Wall (Thick) Construction
Room Side
Wall Sleeve Extension
(See page 11 for
Installation)
Lintels (by others)
Splitters
16" x 42"
Wall Sleeve
Figure 7. Frame and Brick Construction
Wall Construction Types
16" x 42"
Wall Sleeve
Figure 5. Panel Wall (Thin) Construction
Lintel
(by others)
Steel Studs
161/4" High
Concrete
Pillars
421/4" Wide Wall
Sleeve Rough Opening
161/4" x 421/4"
Floor
Wall Sleeve
Rough Opening or
165/8" x 425/8" When using a
Louver Frame
(See page 11 for Installation)
IM 960-1 Applied PTAC / Page of 48
Installation of Subbase
Electric Subbase
An electrical subbase is optional for all 208V and
230V units. A subbase is required for all 265V units.
The subbase is available in 3" (76mm) or 4" (102mm)
heights. The subbase contains leveling legs for
adjustment of up to 1" (25mm) additional height. All
subbases are factory supplied, field installed options.
3. Insert leveling bolts into subbase bottom flange.
Four (4) bolts will be needed if side extensions are used. Only two (2) bolts are required if side extensions are not used.
4. Place the subbase on the floor and align its center line with the center line of the wall opening. Do
not fasten the subbase to the floor. Attach the
subbase to the wall sleeve using the clips
provided with the subbase.
5. The wiring should be roughed in and the conduit
connected to the subbase junction box. Complete
the installation by wiring the receptacle to the
incoming power supply.
1. If the minimum depth subbase is required, discard the side extension pieces.
2. If more than the minimum depth is required, determine the depth of the side extension pieces desired and break at proper score - line. Insert the extension pieces into the front assembly and secure with two short black screws at each side.
Figure 8. Electric Subbase
7/8"
Electrical Knockouts
0" to 93/8"
5/8"
3"
43/8"
5"
12"
17"
2 /2"
1
Plan
11/2"
411/2"
3"or 4"
Leveling Screw (4 Places)
Front Elevation (Three Front Panels in Place)
Electrical Junction Box for
Main Power Connection
3" x 5" (76 to 127mm)
Opening for Electrical
and/or Drain Rough-In
Knockouts for Opitonal
Fuse & Disconnect Switch
Receptacle
(Req’d on 265V Units)
Plug/Cord Cover
(Req’d on 265V Units)
IM 960-1 Applied PTAC / Page of 48
0" to 1"
Notes:
1. Side Channel Dimensions: Adjustable
from 43/8" to 133/4" (111mm to 349mm)
2. Height: 3" to 4" (76mm to 102mm)
with leveling screws adjustable from 0"
to 1" (0mm to 25m)
3. Subbase is optional on 208V and 230V
units. Subbase is required on all 265V
units and units with hydronic heat.
Subbase extends to front edge of unit
when furnished with hydronic heat.
Hydronic subbase is flush with the front
of the cabinet. Electric subbase is flush
with wall sleeve.
Installation of Subbase
Hydronic Subbase
A subbase is available as required with all hydronic
units. This subbase measures 8" (203mm) in height
and includes the hydronic heating coil. Refer to IM
Bulletin 936 for installation details. In addition, rough
in supply and return piping.
Electrical and plumbing rough-in can be done
through the back of the hydronic heat section or
through the openings provided in the bottom of the
subbase. The finished piping can be done now or later.
Figure 9. Hydronic Subbase
As Req’d
21/2"
8 /4"
Receptacle (Factory installed when
fuse & disconnect are furnished)
3/4"
15"
Fuse
1
3" x 5" Opening for Electrical
and/or Piping Rough-in
Optional Fuse Disconnect
21/2"
5/8" O.D. Copper Sweat
Top View
71/4"
Permanent
Mesh Filter
3/4"
411/2"
71/2" 11/2"
63/4"
31/4"
8"
Electrical
Knockout
51/2"
1/4" – 11/4"
Leveling Legs
End View
Front View
Notes:
1. Side channels are adjustable from 0"–93/8" in length by inverting them. Side channels are predrilled to allow infinite adjustment.
2. Subbase shown with louvered front panel removed. Front panel is hinged to allow access to valve, coil, filter & electrical junction box.
3. Leveling legs are adjustable from 1/4"–11/4".
Optional Condensate Drain Kits
External Drain Kit
Internal Drain Kit
Alternate 6" Long, 1/2" O.D.
Straight Copper Tube
IM 960-1 Applied PTAC / Page of 48
Installation of Optional
Condensate Drain Kit
Figure 10 illustrates the installation of the indoor
drain kit. The indoor drain kit must be installed before
placing the wall sleeve into the opening. Install as
follows:
1. Locate the drain so that it will be on the room side of the wall when the wall sleeve is installed.
2. Drill a 1/2" diameter hole in the base of the wall sleeve for the drain.
3. Drill two (2) 5/32" pilot holes for the mounting screws. These holes can be located using the drain kit as a pattern.
4. Assemble the drain kit as shown in Figure 10 and securely fasten it to the wall sleeve with the screws provided. Use either the 90o elbow or 6" straight fitting as required.
5. Install the wall sleeve as described on pages 11-16.
Assembly of the outdoor drain kit should be completed
after the wall sleeve has been installed.
Note: When using the outdoor drain kit, the sleeve must be flush or beyond the outside finished wall (do
not recess).
Install the external drain kit as follows:
1. Assemble the drain kit as shown in Figure 11.
2. Choose the side of the wall sleeve to which the drain kit is to be installed.
3. There are drain holes and pilot holes provided in the wall sleeve from factory. Place the drain kit against the chosen drain hole and fasten securely with screws provided. Use either the 90o elbow or 6" straight fitting as required.
4. Cover the unused drain hole with the block off plate and gasket supplied with the drain kit.
Figure 10. Indoor Drain Kit
om
Ro
Contractor To Drill
Three (3) Holes
To Accept Drain Kit
de
Si
See Detail
Detail
Gasket
Square Drain Holes
Neoprene Sponge Gasket
Cabinet
Bottom
Steel Mounting Plate
Cover
Plate
Screws
Tube
Cover
Plate
Figure 11. External Drain Kit
m
oo
e
Sid
R
Square Drain Holes
Neoprene Sponge Gasket
Steel Mounting Plate
1
/2" (13mm) O.D. Drain Tube
Alternate 6" Long, 1/2" O.D.
Straight Copper Tube
Note: Use of 6" straight drain tube will require modification of architectural louver.
IM 960-1 Applied PTAC / Page 10 of 48
1/2"
(13mm)
O.D.
Installation of Wall Sleeve
Figure 12. Wall Sleeve Extension
Considerations
24"
The wall sleeve is a standard size 16" high, 42"
wide and 133/4" deep. Slide channels are factory
welded into the sleeve to facilitate easy installation
and removal of the chassis. Each wall sleeve is
predrilled to match the mounting screws of the chassis.
Knockouts are provided for the optional external drain
kit used with the heat pump models.
All necessary fasteners are supplied to assemble the
chassis and the louver to the wall sleeve.
16"
Air Splitters
111/8"
42"
Wall Sleeve Extension for Thick Wall
Construction Types
The standard wall sleeve will accommodate a
maximum wall thickness described in table 1. For
thicker walls, wall sleeve extensions are required and
are available from your local representative. When
it is supplied by the representative, it is treated for
maximum corrosion resistance and matched to exact
size of the standard wall/sleeve. Be sure to provide
air splitters to prevent recirculation of condenser air.
Air splitters should be placed in the wall sleeve as
shown in figure 12. It is important that spacing of the
air splitters match exactly those dimensions shown in
figure 12.
Table 1. Maximum Wall Thickness
Maximum Wall Thickness
Louver Type
No
Subbase
Standard
Subbase
Hydronic
Subbase
Stamped
14"(356mm)
91/2"(241mm)
131/8"(333mm)
Architectural
147/8"(378mm)
103/8"(264mm)
14"(356mm)
Installation of Wall Sleeve Extension
Room Side
As Required
24"
Wall Sleeve Extension
67/8"
4.
5. Attach indoor drain kit (if used) according to the instructions on page 10. Outdoor drain kits must be installed after wall sleeve is in place.
Continue wall sleeve installation according to instruction #4 on page 12.
Installation of Louver Frame for Thin Wall
Construction Types
Louver frames should be used for panel wall and
thin wall applications to assure positive anchoring to
the wall. Recess the wall sleeve so that the louver is
flush with the outside of the building. Place louver
frame around wall sleeve as shown in figure 13. Secure
angles at side and top of walls.
CAUTION
DO NOT drill holes in the bottom of the wall sleeve as it
will cause leaks.
Figure 13. Louver Frame Dimensions
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. 2.
3.
Position the extension with standard wall sleeve so proper alignment with drain and mounting holes is achieved.
Place a bead of caulk around the perimeter of the wall sleeve and another bead around the mating side of the wall sleeve extension so that the joint is watertight. Be sure to use a resilient caulking such as silicone.
Assemble the wall sleeve extension to the wall sleeve. Clean out weep holes to assure proper drainage.
183/16"
(1072mm)
423/16"
(1072mm)
163/16"
(411mm)
33/4"
(92mm)
443/16"
(1122mm)
Note:Wall Sleeve rough opening when using a Louver
Frame must be 165/8" x 425/8"
IM 960-1 Applied PTAC / Page 11 of 48
Installation of Recessed Louver
Wall Sleeve
Figure 14. Recessed Louver Wall Sleeve Detail
Level the top of the wall
sleeve, NOT the base
of the wall sleeve (see
IMPORTANT notice)
Steel Lintel
(by others)
93/4"
(248mm)
133/4"
(349mm)
16"
(406mm)
157/8”(403mm)
Room
Cabinet
5/16" (8mm)
Anchor Hole
16"
(406mm)
Wall Sleeve
Wall Receptacle
(by others)
Extends 1/4"
beyond the
exterior face
of the building
Note: Standard subbase is available in 3" or 4" (76 mm or 102 mm) height. Leveling legs provide
adjustment of 1" (25 mm).
Installation Requirements for Recessed
Louver Wall Sleeve
1.
2.
The Recessed Louver Wall Sleeve must extend a minimum of 11/4" past the finished interior wall.
The Recessed Louver Wall Sleeve must be installed so that it is flush with the exterior face of the building and the drip edge must extend 1/4" beyond the face (Figure 14).
Installation of Recessed Louver Wall Sleeve
1.
2.
3.
Heat pump models will generate condensate during the
heating season. If it is not desirable for this condensate
to exit outdoors from the wall sleeve drain holes, install
indoor or outdoor drain kits, available from your sales
representative (see page 9 & 10).
4.
Clean the opening of all debris that may interfere with installation.
If the unit is to be supplied with a subbase, install subbase before installing wall sleeve (see IM 936).
lf the optional drain kit is to be employed (heat pump only), see IM 942.
IM 960-1 Applied PTAC / Page 12 of 48
If a masonry wall, place a thin pad of soft mortar on the bottom of the opening and slide in the wall sleeve. Louver should be flush to exterior surface when complete.
Note: The wall sleeve is not intended to replace the lintel.
Drip Edge
Detail
See Note
Finished
Floor
or Carpet
NOTICE
IMPORTANT!
Do Not level base of wall sleeve. The bottom of the Recessed
Louver Wall Sleeve has a built in pitch to the outside for
proper drainage. (The inside height dimension is 15.88"
and the outside dimension is 16" to provide the necessary
drainage pitch). Level the wall sleeve using the top or the
inside top surface of the wall sleeve
NOTICE
A Flush Stamped Louver can not be used with a recessed
louver wall sleeve. Louver is special order. Contact
factory for more information if necessary.
5.
6.
Level the wall sleeve in both directions, left to right and inside to outside, using the top of the wall sleeve and plumb wall sleeve for vertical on the sides.
Secure by anchoring with appropriate fastener(s). A 5/16" (8mm) hole is provided on each side, 2" (51 mm) down from the top and 2" (51mm) in from the rear of the wall sleeve. Additional holes may be required to firmly secure the wall sleeve (Figure 15).
CAUTION
DO NOT drill holes in the bottom of the wall sleeve as it
will cause leaks.
Installation of Basic Wall Sleeve
Anchoring The Wall Sleeve
Anchoring the wall sleeve in the opening is
accomplished as shown in figure 15.
CAUTION
DO NOT drill holes in the bottom of the wall sleeve as it
will cause leaks.
It is recommended that rubber isolation washers be
used with the fasteners to minimize sound transmission
from the equipment to the wall at the point of contact.
Figure 15. Anchoring the Wall Sleeve (all anchoring
hardware field supplied)
Rubber
Isolation
Washer
Expansion
Anchor Bolt
Molly or
Toggle Bolt
Do Not Drill Holes in Bottom of
Sleeve
(Except for Internal Drain Kit)
Wood
Screw
Cripple Stud
Main Stud
Attaching Cabinet Wall Sleeve to Subbase
1.
2.
3.
4.
5.
Where a subbase is used, secure wall sleeve to subbase with clips provided.
Caulk the wall sleeve to the wall opening on both the inside and outside perimeter. Be careful not to plug the weep holes. Caulking should be resilient, nonhardening type such as silicone.
Secure the two sections by installing the clip screws supplied with the hardware bag.
Caulk indoor/outdoor perimeter of wall sleeve with resilient caulk such as silicone.
Finish any uncompleted electrical and/or plumbing
con­nections.
Frame and Brick Wall Construction Type
A heavy-gauge, corrosion resistant wall sleeve
is provided for each unit. The wall sleeve is either
shipped in a separate carton or shipped in a multipack
of 15.
The basic wall sleeve is designed to be easily
installed in a variety of wall constructions. Note: The
center of gravity is 10" (254mm) from the rear face of
the wall sleeve. The wall sleeve must be inserted into
the wall at least 10" (254mm) or other support must
be employed. Support can be from a factory supplied
subbase or from other field supplied materials.
Recommended installation procedures are described
below (see Figures 16, 17, & 18).
1. Clean the opening of all debris that may interfere with installation.
2. If the unit is to be supplied with a subbase, install subbase before installing wall sleeve (see IM 936).
3. lf the optional drain kit is to be employed (heat pump only), see IM 942.
4. Place a thin pad of soft mortar on the bottom of the opening and slide in the wall sleeve. Be sure to recess the wall sleeve enough to accommodate outside louver. This recess is 3/8" (9.5mm) for stamped louvers and 11/4" (32mm) for architectural louvers. Louver should be flush to exterior surface when complete.
Note: The wall sleeve is not intended to replace the
lintel.
5.
Level wall sleeve left to right and pitch 1/4" front to back, pitch to the outside. Secure by anchoring with appropriate fasteners. A 5/16" (8mm) hole is provided on each side, 2" (51 mm) down from the top and 2" (51mm) in from the rear of the wall sleeve. Additional holes may be required to firmly secure the wall sleeve. Refer to Anchoring The Wall Sleeve instructions and figure 15.
CAUTION
DO NOT drill holes in the bottom of the wall sleeve as it
will cause leaks.
6.
7.
Where a subbase is used, secure wall sleeve to subbase with clips provided.
Caulk the wall sleeve to the wall opening on both the inside and outside perimeter. Be careful not to plug the weep holes. Caulking should be resilient, nonhardening type such as silicone.
IM 960-1 Applied PTAC / Page 13 of 48
Installation of Basic Wall Sleeve
Figure 16. Frame and brick with electrical subbase
Figure 18. Frame and brick with hydronic subbase
Steel Lintel
(by others)
Steel Lintel
(by others)
Outside
Louver
43/8"
(111mm)
93/4"
(248mm)
133/4"
(349mm)
133/4"
(349mm)
Mounting
Holes
(by installer)
16"
(406mm)
16"
(406mm)
Room
Cabinet
Wall Sleeve
Subbase
Caulk Perimeter
both Indoor and
Outdoor Before
Installing Louver
See Note
Leveling
Finished Floor
Leg
or Top
Power Supply Connect
of Carpet
(Alternate Entry)
Note: Standard subbase is available in 3" or 4"
(76 mm or 102 mm) height. Leveling legs provide
adjustment of 1" (25 mm).
Figure 17. Frame and brick with cord connection
Steel Lintel
(by others)
93/4"
(248mm)
Mounting
Screws
by Installer
Outdoor
Louver
16"
(406mm)
16"
(406mm)
Room
Cabinet
3" Min. (76mm)
Wall
Receptacle
(by others)
IM 960-1 Applied PTAC / Page 14 of 48
Mounting
Screws
by Installer
Caulk
Perimeter
both Indoors
and
Outdoors
Before Installing
Louver
Subbase Side
Channel
16"
(406mm)
16"
(406mm)
Wall Sleeve
Room
Cabinet
Hydronic
Heating Coil
81/4"
(209mm)
Alternate
Electrical
Connections
Finished Floor
or Carpet
Hydronic Subbase
Leveling Leg
Panel Wall Construction Type
For panel wall and thin wall construction, it is
recommended that a louver frame be used (See Louver
Frame Installation For Thin Wall Types on page 11,
and figures 19, 20 & 21).
Panel wall and thin wall construction varies only
slightly from frame and brick construction.
Note: The center of gravity is 10" (260mm) from the
rear face of the wall sleeve. The wall sleeve must be
inserted into the wall at least 10" (260mm) or other
support must be employed.
133/4"
(349mm)
Wall Sleeve
Caulk
Perimeter
93/4"
(248mm)
Outdoor Louver
Finished Floor
or Carpet
Support can be from a factory supplied subbase or
from other field sup­plied materials. Installation for this
application is as follows (Figures 19, 20, & 21).
1. Clean the opening of all debris that may interfere with installation.
2. If the unit is to be supplied with a subbase, install subbase before installing wall sleeve (see IM 936).
3. If the optional drain kit is to be employed, see IM 942.
4. Be sure the wall sleeve is mechanically attached to the wall and caulked to assure a proper seat. It is recommended that the louver frame be used for this purpose.
Installation of Basic Wall Sleeve
5. Recess the wall sleeve so that the louver is flush with the exterior of the building.
6. Level wall sleeve left to right and pitch 1/4" front
to back to the outside. Secure by anchoring with
appropriate fasteners or drill additional holes as
required to secure firmly. Refer to Anchoring The
Wall Sleeve instructions on page 13.
3. Secure the two sections by installing the clip screws supplied with the hardware bag.
4. Caulk indoor/outdoor perimeter of wall sleeve
with resilient caulk such as silicone.
5. Finish any uncompleted electrical and/or plumbing
con­nections.
Figure 20. Panel wall construction with cord connection
CAUTION
Louver Frame
(see page 11 for details)
DO NOT drill holes in the bottom of the wall sleeve as it
will cause leaks.
7. Where a subbase is used, secure wall sleeve to subbase with clips provided.
8. Caulk the wall sleeve to the wall opening on both
the inside and outside perimeter. Be careful not to
plug the weep holes. Caulking should be resilient,
nonhardening type such as silicone.
9 /4"
(248mm)
3
Louver Frame
(see page 11 for details)
Room
Cabinet
Wall Sleeve
Caulk
Perimeter
both Indoors
& Outdoors
Floor
Outside
Louver
Wall Sleeve
Conduit
133/4"
(349mm)
Room
Cabinet
16"
(406mm)
3"Min. (76mm)
93/4"
(248mm)
16"
(406mm)
133/4"
(349mm)
16"
(406mm)
Figure 19. Panel wall construction with standard
electrical subbase
Receptacle
(by others)
16"
(406mm)
Minimum
2 Supports
(field supplied)
Figure 21. Panel wall installation with hydronic subbase
Electrical
Subbase
Louver Frame
(see page 11 for details)
93/4"
(248mm)
See Note
Floor
Power Supply Connect
(Alternate Entry)
Outside
Louver
Gasket
& Caulk
Perimeter
Subbase Side Channel
Room
Cabinet
16"
(406mm)
Note: Standard subbase is available in 3" or 4"
(76 mm or 102 mm) height. Leveling legs provide
adjustment of 1" (25 mm).
Attaching Wall Sleeve to Subbase
1. Where a subbase is used, secure wall sleeve to subbase with clips provided.
2. Caulk the wall sleeve to the wall opening on both
the inside and outside perimeter. Be careful not to
plug the weep holes. Caulking should be resilient,
nonhardening type such as silicone.
133/4"
(349mm)
16"
(406mm)
Hydronic
Heating
Coil
81/4"
(209mm)
Outside
Louver
Wall Sleeve
Subbase
Side
Channel
Caulk
Perimeter
both Indoors
& Outdoors
Power Supply Connect
(Alternate Entry)
Leveling Legs with 1" Adjustment
IM 960-1 Applied PTAC / Page 15 of 48
Installation of Basic Wall Sleeve
Thick Wall Construction Type
Installation of wall sleeves for thick walls requires
special consideration. Table 2 should be used to
determine the maximum wall thickness allowed for the
basic wall sleeve. For thicker walls, wall sleeve exten­
sions are available from your representative (see page
11 for details).
Wall sleeve installation in thick walls is similar to
frame and brick installation. Install as follows (Figure
22, 23, & 24).
1. Clean the opening of all debris that may interfere with installation.
2. If the unit is to be supplied with a subbase, install subbase before installing wall sleeve see IM 936.
3. If the optional drain kit is to be employed (heat pump only) see IM 942.
4. If wall thickness exceeds dimensions shown in Table 2, a wall sleeve extension must be used.
Once the extension is attached to the wall sleeve,
place a thin pad of soft mortar on the bottom of
the opening and slide in the wall sleeve/extension
assembly. Be sure to recess the wall sleeve enough
to accommodate outside louver. This recess is 3/8"
(9.5mm) for stamped louvers and 11/4" (32mm) for
architectural louvers. Louver should be flush to
exterior surface when completed. Note: The wall
sleeve is not intended to replace the lintel.
5. Level wall sleeve left to right and pitch 1/4" front
to back to the outside. Secure by anchoring with
appropriate fasteners or drill additional holes as
required to secure firmly. Refer to Anchoring The
Wall Sleeve instructions on page 13.
Figure 22. Thick wall construction with electrical
subbase
See Table 2
Steel Lintel
(by others)
43/8" Min. (111mm)
93/4"
(248mm)
Caulk
Perimeter
Mounting
Screws
(by installer)
Outside
Louver
See
Note
2
133/4”
(349mm)
Wall
Sleeve
Extension
Electrical
Subbase
6.
7.
Where a subbase is used, secure wall sleeve to subbase with clips provided.
Caulk the wall sleeve to the wall opening on both the inside and outside perimeter. Be careful not to plug the weep holes. Caulking should be resilient, nonhardening type such as silicone.
Table 2. Maximum Wall Thickness
Floor
Notes:
1. Standard subbase is available in 3" or 4" (76
mm or 102 mm) height. Leveling legs provide
adjustment of 1" (25 mm).
2. Wall sleeve extension is available in various
depths and supplied as required.
Figure 23. Thick wall construction with cord connection
See
Table 2
1/8"(3mm) Min.
Louver Type
No
Subbase
Standard
Subbase
Hydronic
Subbase
Stamped
14"(356mm)
91/2"(241mm)
131/8"(333mm)
Architectural
14 /8"(378mm)
10 /8"(264mm)
14"(356mm)
7
3
Caulk
Perimeter
Outside
Louver
Mounting
Screws
(by installer)
Steel Lintel
(by others)
133/4"
(349mm)
Wall
Sleeve
Wall
Sleeve
Extension
Maximum Wall Thickness
Room
Cabinet
See Note 1
CAUTION
DO NOT drill holes in the bottom of the wall sleeve as it
will cause leaks.
16"
(406mm)
16"
(406mm)
93/4"
(248mm)
16"
(406mm)
16"
(406mm)
Room
Cabinet
3"Min. (76mm)
Floor
Receptacle (by others)
IM 960-1 Applied PTAC / Page 16 of 48
Installation of Basic Wall Sleeve
Figure 24. Thick wall installation with hydronic subbase
Figure 25. Flush Stamped Louver
See Table 2,
page 16
Steel Lintel
(by others)
Caulk
Perimeter
1" (25mm)
Wall Sleeve
133/4"
(349mm)
Mounting
Screws
(by installer)
Outside
Louver
16"
(406mm)
Wall
Sleeve
Extension
93/4"
(248mm)
Room
Cabinet
Figure 26. Architectural Louver
16"
(406mm)
Hydronic
Heating
Coil
81/4"
(209mm)
Floor
Hydronic
Subbase
Attaching Wall Sleeve to Subbase
1.
2.
3.
4.
5.
Where a subbase is used, secure wall sleeve to subbase with clips provided.
Caulk the wall sleeve to the wall opening on both the inside and outside perimeter. Be careful not to plug the weep holes. Caulking should be resilient, nonhardening type such as silicone.
Secure the two sections by installing the clip screws supplied with the hardware bag.
Caulk indoor/outdoor perimeter of wall sleeve with resilient caulk such as silicone.
Finish any uncompleted electrical and/or plumbing
con­nections.
Outdoor Louvers
Two styles of exterior louvers are available. The
flush stamped louver is a one-piece stamped aluminum
type that is finished natural and clear anodized (Figure
25). Attractive, rugged architectural louvers (Figure
26) are extruded aluminum and are finished natural
and clear anodized (optional colors are also available).
Louvers by others are acceptable as long as
they meet factory specifications. 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.
Note: A Flush Stamped Louver cannot be used with a recessed louver wall sleeve. Recessed Louver is
special order. Contact factory for more information if
necessary.
Free area is defined by ASHRAE as the minimum
area of the openings in an air inlet or outlet through
which air can pass. Have your local McQuay
representative evaluate the application of special
louvers or building facade treatments that may
affect normal operation of the unit or restrict free
air discharge of condenser airflow. A louver design
that restricts the passage of condenser air or causes
condenser air to be recirculated can dramatically
alter the performance of the unit. Unit capacity and
efficiency may be decreased and fan motor and
compressor life can be shortened.
If the louver does not meet the requirements set
out above or it is only marginally acceptable, then
a drawing will be required for factory evaluation. If
acceptance cannot be determined by the drawing, then
a sample of the proposed louver must be sent to the
factory for testing and certification. The sample sent
for testing must be at least 16" high by 42" wide.
IM 960-1 Applied PTAC / Page 17 of 48
Typical Louver Design
Figure 27 illustrates some typical louver designs.
The “X” dimension represents the narrowest
dimension through which air must pass. The “Y”
dimension represents the increment of rise between the
blades. To calculate the percentage of free area, divide
dimension “X” by dimension “Y” (see Example).
Figure 27. Louver Designs
Installation of Louver
1
2
3. 4. 5. 6.
Remove louver and mounting hardware from the shipping carton.
Remove temporary cardboard weather panel from
wall sleeve.
Make a temporary handle by looping a piece of flexible wire or heavy cord through the louver. This enables the installer to keep a firm grasp on the louver when installing from inside the room.
Angle the louver through the opening at the rear of the wall box, then pull the louver back to the wall sleeve flange so that the louver studs pass through the holes in the flange.
Attach washers and nuts and secure louver in place.
If the heating/cooling chassis is not to be immediately installed, replace the weather panel.
Installation of Chassis
Example:
Free Area % = YX x 100
Proper installation of the heating/cooling chassis
is extremely important to the proper operation of the
unit. Whether the wall sleeve has been separately
shipped or shipped with the chassis, proper installation
is as follows:
Where X = .7
WARNING
Y = 1.0
The chassis weighs approximately 150 lbs. Use blocking
and lifting devices. Do not raise over any body parts.
Free Area % = 1.07 x 100 = 70%
IMPORTANT!
Air flow 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
1.
2. 3. Remove shipping carton and inspect for any shipping damage. Report any found to the carrier.
Save shipping carton to cover installed conditioner until construction is complete.
Check nameplate data on chassis to insure that the correct job site distribution has been made with respect to heating/cooling capacities. Generally, corner rooms require larger capacities.
WARNING
Improper electrical supply can cause property damage,
severe personal injury or death.
4. Set front panel and air filter aside.
5. Remove chassis from carton by pulling evenly on substantial portion of unit.
CAUTION
Do not lift by pulling on the tubing. Tubing can crack or
bend damaging the unit.
IM 960-1 Applied PTAC / Page 18 of 48
6. If wall sleeve has been previously installed, remove temporary cardboard weather panel.
7 If louver has been previously installed, remove temporary cardboard weather panel.
8 Place Tinnerman clips on wall sleeve. Clips and mounting screws enclosed in a bag attached to the inside chassis side panel (Figure 28).
9. Rotate fans to be sure they are free of obstruction.
10. Check all fasteners to make certain they did not loosen during shipment. Do not loosen nuts holding down compressor; they are factory installed.
11. Do not lubricate motors before start-up. Motors are permanently lubricated by the manufacturer.
12. Check all copper tubing and capillaries for proper clearance so they will not hit or rub during operation.
13. When installing the chassis in older wall sleeves,
it may be necessary to bend the sheet metal flange
at the rear of the wall sleeve rails to allow full
insertion of the chassis.
14 Slide chassis into wall sleeve until firmly seated against weather seals.
Note: If weather seals are old or in bad condition,
replace to make a proper seal.
Make sure tubing does not catch when inserting
chassis.
CAUTION
Do not push on the coil surface, control box cover or fan
scroll.
15. Secure the chassis in the wall sleeve with four (4)
screws packaged with the Tinnerman clips (Figure 28).
16. Plug electrical cord into receptacle. Excess cord for 208V and 230V units should be coiled neatly and stored in the conditioner. Attach plug/cord cover to front face of subbase on 265V.
17. Set the manual damper operator in open or closed position as desired. On units equipped with the optional automatic fresh air damper, the damper is factory set to open whenever the fan motor is running and closed when it is off.
18. Set the indoor fan mode for off cycle on the PC
board for the off cycle selection of 10, 20, 30
minutes or 1 hour off cycle time. The fan will
operate for 2 minutes and shut down for the
selected off cycle period. For continuous fan
operation, the fan mode selection on the touchpad
or remote thermostat must be set to continuous or
on. When the room thermostat is in the cycle or
auto mode, it will cycle the indoor fan when there
is a call for heating or cooling. See page 34 & 35
for jumper placement details.
19. Set the temperature limiting feature to the desired range of thermostat operations. As shipped, the range is 60°F to 85°F.
20. Replace the air filter and front panel.
21. For hydronic units:
a. Route the two low voltage valve wires, with Molex connection, through the opening provided in the subbase and connect to valve.
b. Connect short power cord from the chassis to the receptacle in the subbase heat section.
c. Relocate thermostat bulb to bracket located in the subbase. Refer to IM 936 which is provided with the hydronic subbase.
d. Replace filter and louvered subbase front panel.
Tinnerman Clips
Figure 28. Chassis Installation (Slope Top Unit Shown)
Wall Sleeve
Left end view
Chassis
Wall Sleeve Rails
(See Note 21 Above)
Damper & Damper Actuator
Screws (4)
IM 960-1 Applied PTAC / Page 19 of 48
Unit Service with ExtendAire Installed
Figure 29. Unit with ExtendAire
ExtendAire™ Kit
The ExtendAire plenum system is internally
lined with 1/4" (6mm) fiberboard, 6 lb. (13.2 kg)
density to prevent condensation on the exterior
surface. It is factory painted Antique Ivory,
matching the finish of the basic cabinet. Each
extension section is furnished in two pieces such
that the rear half can be fastened to the wall
and the front half then snapped in place without
the use of screws or tools. Duct cross-sectional
dimension is 4½" x 7½". The installer can select
the number of active grilles in the primary
discharge section that will provide diversion of
the specified percentage of air to the adjoining
room outlet.
The percent air diverted can be adjusted from 24%
to 50% as outlined in the selection table.
Figure 30. Typical ExtendAire Assembly
IM 960-1 Applied PTAC / Page 20 of 48
Refer to Figure 30 for disassembly of ExtendAire.
1. Disconnect power from unit.
2. Remove end cap from ExtendAire primary
discharge section (A).
3. Remove cabinet front panel by lifting straight up
until panel clears cabinet side rails (B).
4. Remove touchpad control by releasing friction
clips located on the underside of the touchpad (C).
5. Remove communication cord from bottom of
touchpad (D).
6. Remove two (2) discharge grilles from the top of
the ExtendAire primary section (E).
7. Loosen the two (2) "T" bar upper and lower hold
down clamps and turn 90 degrees (F).
8. Remove ExtendAire primary discharge section by
GENTLY using a small screwdriver to pry it loose
at the connection “dimples” between the primary
and extension section (G).
9. Remove the (4) chassis to wall sleeve retaining
screws, (2) on each side.
10. Remove cabinet retaining screws from the side
panels.
11. Slide chassis forward approximately 4" and
remove or loosen the (5) cabinet retaining screws
on the top of the chassis.
12. Remove cabinet from chassis by lifting straight up.
13. Slide chassis out of wall sleeve.
14. Install in reverse order.
Controls (Non-programmable)
Figure 32. Standard Digital Control Indicators
Standard Digital Touchpad Control
LED
2-Digit Display
Figure 31. Standard Digital Touchpad Control
9- LED
Indicators
7- Push Buttons
User Interface
Application
The PTAC Digital Control is used to control
a PTAC Unit that includes both an integral air
conditioner and a source of heat.
The Digital Control is operated with a Touchpad.
Inputs and Outputs
•
•
•
•
•
•
•
•
•
•
•
•
Indoor coil sensor, (ICS)
Outdoor coil sensor, (OCS)
Indoor air sensor, (IAS)
Outdoor air sensor, (OAS)
Remote T’stat, T’STAT (RCWYBG)
Power supply: (24VAC)
Line voltage input, (L1, L2)
Indoor fan standby voltage, (L1STB L2STB)
Control selection: (LUI, T’STAT
Model selection: (AC/E, HP, HP/E)
Time delay bypass, (TEST) Indoor off fan cycle: (FAN, OFF CYCLE–10, 20, 30, 1 HR)
Outputs
•
•
•
•
•
Compressor output, COM
Indoor fan, BLOWER LO, HI
Outdoor fan, OUTDOOR FAN
Electric heater, ELE
Reversing valve, REV VALVE
The user will by default control the Electronic
Controller via the touchpad. The user can select with a
jumper for the unit to receive commands from a Remote
Thermostat.
Keys and Indicators Labels
7 Push Buttons
ON/OFF, FAN SPEED, MODE
FAN MODE, SLEEP
for
Temp buttons:
Temp UP and
for Temp DOWN
9 LED Indicators
SLEEP, COOL, COOL/DRY, FAN, HEAT, HIGH, LOW, CYCLE, CONT.
LED 2 Digit Displays No Label
Display Function Legend
Tr = Room Temperature
hI = High Room Temperature
Lo = Low Room Temperature
LA= Low Ambient Lockout
rT = Remote Thermostat Control
tP = Touchpad Control
t = Time
Ts = Temperature Setpoint
Rf = Room Freeze Condition
CF= Coil Freeze Protection
F = Fahrenheit
C = Celsius
LC= Control Lockout Mode
Remote Thermostat Control
The Remote Thermostat can be any thermostat
that can interface with an electronic thermostat via
RCWYBG terminals. The Control Selection jumper
must be in T’STAT position. During a call the remote
thermostat will pass R back to the controller on a
respective terminal. The push buttons on the touchpad
become inactive in the remote thermostat mode.
However, the control pad LED display will indicate
the mode of operation, and the room temperature.
IM 960-1 Applied PTAC / Page 21 of 48
Controls
Standard Digital Touchpad Control
Operation
Memory Recall
The digital control shall start with the last settings
used prior to power down. These settings are saved in a
non-volatile memory. Factory set mode is OFF.
On/Off Triggering
Control can be turned On/Off via LUI, Remote
T’stat, or Sleep feature. The control will show the
temperature set point when the mode is Cool, Cool
Dry, or Heat. The display will be blank in Fan mode.
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 protections section of this spec the Sleep operation is overridden by room freeze protection.
Control Off
When the control is in the Off Mode, relay outputs
will be disabled with the exception of the indoor
fan (blower). It will stay on to meet the Hot Keep
specification. Indicator LED’s are all off.
Temperature Range
The maximum operating temperature range is
selectable via the Touchpad and is 60°F to 85°F, with
the limits included. The Remote Thermostat selectable
operating range is 60°F to 90°F with limits included.
The range is set in the Set-up menu.
IM 960-1 Applied PTAC / Page 22 of 48
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 satisfied and the heating
source or the compressor is deactivated, the indoor fan
will repeatedly run for 2 minutes on and the number
of minutes selected on the PC Board off, until the next
cut-in cycle. The number of cycles with timing as
described above is determined based on the OFF FAN
CYCLE jumper setting.
Remote T’Stat Mode
The unit can be jumper configured to take
commands from a Remote Thermostat. The Remote
Thermostat will call for Heat and Cool through the
electronic controller.
1.
2.
3.
The Remote T’stat will control through the board the work of the compressor, indoor and outdoor fans, the reversing valve, and the heater
System will run in Cool mode when Y signal is high. In cool mode compressor (therefore outdoor fan) shall turn on
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
Controls
Standard Digital Touchpad Control
System Select Operation Using Remote
Thermostat
System will run in Heat mode and engage certain
outputs based on the system selection (jumper) as
described below (see Standard Digital Control Board
Wiring Diagram on page 35).
AC/ELE
•
If AC/ELE is selected then a signal on W terminal will call for heating.
•
If HP or HP/ELE is selected then signals on Y and B terminals will call for heating.
HP or HP/ELE
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 will default to “cycle” and the
fan speed will be user set via the touchpad 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 confirm 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 five
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 five seconds to
confirm normal mode has been resumed.
Modes of Operation
Cool Mode
In Cool Mode, the compressor will start if the
temperature at the space temperature sensor is 1°F
or higher than the set point. It will stop if the space
temperature sensor is 2°F or lower than the set point,
subject to timing requirements.
In the Cool Mode, the indoor fan will operate
according to the user settings for Fan Mode –
Continuous or Cycle and Speed.
Cold Start
Cold start is initiated when the control has not
called for cooling for more than two (2) hours or
during a power-on-reset. During cold start, the set
point is lowered by 4°F (Tset-4°F) if the differential
calls for cooling. The unit will operate in cold start
until the new set point is satisfied (+ 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 five
(5) seconds. Before the sleep time expires, the setting
can be adjusted above the number of hours passed by
pressing the Sleep Button. Pressing the On/Off Button
can terminate the Sleep Mode.
A changeover from Heat to Cool or another Mode
will reset the Sleep Timer.
The Sleep Function will be deactivated by pressing
the power-on-reset or any button (except sleep) on the
touchpad or the Remote Control.
IM 960-1 Applied PTAC / Page 23 of 48
Cool Dry Mode
Figure 35. Zone C
Select the Cool Dry Mode when the standard Cool
Mode does not provide sufficient dehumidification. 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 33. if Tr - Ts > 4°F, operation will be in Zone A
Figure 34. if 2°F < Tr - Ts < 4°F, operation will be in
Zone B
Figure 35. if 0°F < Ts - Ts < 2°F, operation will be in
Zone C
Figure 36. if Ts - Tr > 5°F, operation will be in Zone D
The other temperature ranges are dead bands for zone
stability.
On
Compressor
Off
t
6 mins.
6 mins.
On
Low Fan
Off
t
0 secs.
0 secs.
*
* = Zone Determination Time
Figure 36. Zone D
On
Fan
Off
t
On
Compressor
Off
*
12 mins.
Figure 33. Zone A
* = Zone Determination Time
Modes of Operation-Description
Compressor
On
Off
Standard Digital Touchpad Control
t
Heat Mode
Low Fan
On
t
Off
*
12 mins.
Unit will call for heating based on the type of
the heat source it has: heat pump in reverse cycle or
electric.
t
1) Hot Start:
* = Zone Determination Time
Figure 34. Zone B
On
Compressor
Off
t
8 mins.
4 mins.
On
Low Fan
Off
t
0 secs.
0 secs.
IM 960-1 Applied PTAC / Page 24 of 48
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 satisfied (with a 1°F differential) or unit has run for at least 20 minutes. After one or both conditions are met, the set point will be reset to the user’s setting and the unit will run in regular heat mode. Hot start is not available with the Sleep feature. The fan will operate per the Fan Mode and Speed setting.
PRELIMINARY
2) Hot Keep:
Hydronic Valve Operation
When the water valve closes, the indoor fan will operate per the user mode (Constant or Cycle) and speed setting.
To advance from Temperature Limit Settings to
Hydronic Valve operation, press the Mode button
once. To toggle the setting, press either the Up or
Down button. Settings are “no” (normally open) and
“nc” (normally closed). Default setting is “no”.
3) Sleep Function:
Sleep time is user adjustable from 1 to 15 hours in one hour increments, in a closed loop via the touch pad, by pressing the Sleep button repeatedly. The Sleep Mode can be terminated by pressing the On/Off button.
The Sleep Function will lower the temperature
setting with time. Changing the Mode or a changeover
from Heat to Cool will reset the Sleep Timer.
The Sleep function will be deactivated by Poweron-reset, or by pressing any button on the Touchpad
except Sleep.
4) Fan Mode:
In the Fan Mode, the fan will operate continuously at the user’s speed setting. The compressor and outdoor fan will not operate. In single motor units, the outdoor fan will run along with the indoor fan.
Set Up Mode
To enter the Set Up Mode, simultaneously press the
Mode, Up and Down buttons for 5 seconds. To change
settings, press the Up or Down button. To move from
one screen to another, press the Mode button.
To exit Set Up, press the Mode Up and Down
buttons simultaneously for 5 seconds or control will
automatically exit Set Up in 15 seconds.
Settings within the Set Up Mode are as follows:
Control Selection:
To view the Control Selection Screen, press and
hold the Up and Down buttons for 5 seconds. The
setting may be changed by pressing either the Up or
Down button. The “tP” setting is the default setting
and indicates the touchpad control.
Fresh Air Damper Control
The Fresh Air Damper will operate when the
following conditions are met:
A. Damper setting in the touchpad set-up mode is “AU” (automatic) AND
B. Indoor fan motor turns on AND
C. Outdoor Air Sensor (OAS) temperature is greater than 40ºF but less than 90ºF AND
D. Indoor Air Sensor (IAS) temperature greater than 50ºF.
This control can be overridden by changing the
damper setting in the set-up mode to “CL” (Close).
Indoor Air Quality Boost Fan
The IAQ Boost Fan will operate in conjunction
with the Fresh Air Damper and increase the volume of
fresh air to 90 CFM. The Fresh Air Damper and Boost
Fan will operate when the following conditions are met:
A. Damper setting in the touchpad set-up mode is “AU” (automatic) AND
B. Indoor fan motor turns on AND
C. Outdoor Air Sensor (OAS) temperature is greater than 40°F but less than 90°F AND
D. Indoor Air Sensor (IAS) temperature greater than 50°F.
This control can be overridden, close the damper
and turn off the Boost Fan by changing the damper
setting in the Set-up Mode to “CL” (Close).
Temperature Limit Settings
To advance from Control Selection to Temperature
Limit Settings, press the Mode button once. To set the
Cool Minimum set point, press and hold Fan Cycle
button and adjust the setting with the Up or Down
buttons. The minimum setting is 60°F.
To set the Heat Maximum set point, press and hold
Fan Speed button and adjust the setting with the Up or
Down buttons. Maximum setting is 85°F.
The Display will show the upper operating limits
first. The default settings are Cool min. = 60°F and
Heat max. = 85°F.
IM 960-1 Applied PTAC / Page 25 of 48
Modes of Operation
Standard Digital Touchpad Control
Compressor Random Restart
Indoor Air Sensor Reading
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.
To advance from Hydronic Valve operation to Indoor
Air Sensor Reading, press the Mode Button once. The
control readout will show room temperature.
Figure 37. Indoor Air and Indoor Coil Sensor Locations
Indoor
Coil Sensor (ICS)
Indoor
Air Sensor (IAS)
Outdoor Air Sensor Reading
To advance from Indoor Coil Sensor reading to
Outdoor Air Sensor reading, press the Mode button
once. The control readout will show the outdoor air
sensor temperature.
Figure 38. Outdoor Air Sensor Location
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 treats a sensor open or short as
extremely cold or hot and reacts accordingly. The
exception is the room air sensor, in which case the
system will turn off. When the fault is corrected by
replacement or repair, the respective error code will
clear from the display (Table 1).
In Anti-Freeze Mode, the compressor and outdoor
fan will be stopped and the display will show “CF”.
The compressor and outdoor fan can be started only if
the following conditions are met:
1. after the 2 minute delay on break, AND
2. the indoor coil reaches 49°F or above and remains there for at least 1 minute, OR
3. another Mode is selected.
The system is in Anti-Freeze Mode when the
following conditions are met:
1. The control is in either Cool or Cool/Dry Mode.
2. The indoor coil reaches 32°F and stays there for at least five (5) minutes.
3. The compressor has run for at least 90 seconds.
Sleep Timer is overridden during this operation. Anti-freeze Protection is active in all modes of operation and when the control is Off.
Table
3. – Failure Code and Condition
Room Freeze Protection
Outdoor Air Sensor
(OAS)
Thermistor Failure Code and Condition
Thermistor Sensor Condition
Room < - 58°F or
> 140°F or
E1
Open or Close
Indoor Coil < - 22°F for > 2s or
> 176°F for > 2s or
E2
Open or Close
< - 22°F for > 2s or
Outdoor Air
> 176°F for > 2s or
Error Code
Open or Close
IM 960-1 Applied PTAC / Page 26 of 48
E4
When room temperature falls below 41°F, the
hydronic valve is opened and the indoor fan operates
on High Speed. The compressor and outdoor fan are
off and the display will show “Rf”. The hydronic valve
will close when the room temperature rises back to
50°F. During room freeze conditions, the temperature
setting can be adjusted with the touchpad. Fan modes
and Sleep Operation are overridden during Room
Freeze Protection. Room Freeze Protection is active in
all modes of operation and when control is off.
Modes of Operation
Standard Digital Touchpad Control
Temperature Limiting
When the room temperature drops 5°F below set
point, the display will indicate “Lo.” When the room
temperature rises 5°F above set point, the display
will indicate “hI.” Alarm indications of 5°F above or
below set point will be consistent with the set up mode
settings for minimum and maximum temperatures.
Temperature Limit Settings
1 To adjust the lower operating temperature limit (cool minimum set point) press and hold Fan Mode button and adjust the setting with Up or Down buttons. The minute setting is 60ºF (15ºC).
2. To adjust the upper operating temperature limit (heat maximum set point) press and hold down Fan Speed button and adjust the setting with Up and Down buttons. The maximum setting is
85ºF (30ºC). When control selection is set for
“T'STAT,” the maximum setting can go up to 90ºF
(32ºC).
3. The upper operating temperature limit will be
displayed first.
4. Default settings are: Cool minimum 60ºF (15ºC)
and Heat maximum 85ºF (30ºC).
Electrical Service
All wiring should be done in accordance with all
local and National Electrical Code requirements. The
conditioners are supplied as follows:
Electrical Heating Unit
1. 208V and 230V models are supplied with a power
cord which will exit from beneath the conditioner
on the control side. The cord has a usable length of 72" (457.2mm) from where it exits the conditioner. The use of an extension cord is not recommended.
Time delay fuses are recommended to avoid nuisance tripping. The receptacle is generally mounted beneath the conditioner, on or recessed in the wall so that it is concealed by the conditioner over hang. The space under the conditioner must be at least 3" (76mm) high.
2. An electrical subbase is available for 208V and 230V units and contains a junction box for a field mounted receptacle All electrical connections are made within the subbase, thus eliminating the 3. need for a wall mounted receptacle.
The subbase is available in 3" (76mm) or 4" (102mm) height and can be furnished with factory mounted fused disconnect option.
On all 265V models, an electrical subbase is required. The chassis is supplied with a “short cord” which is just long enough to plug into the subbase. A plug cord cover is also furnished with the subbase to make the interconnecting cord inaccessible as required by the National Electrical Code. The conditioner is marked with the minimum circuit ampacity and maximum fuse size.
Equipment Start-up
Initial start-up of the Incremental® conditioners
by experienced personnel is usually the responsibility
of the installing contractor. This start-up consist
of inspecting and operating the equipment for all
functions at the time of initial installation and making
necessary adjustments. It also includes demonstrating
its proper operation to the owner or his agent.
Note: That unless otherwise specifically agreed to in
writing, McQuay International includes no field labor,
start-up service or the like in the price of its equipment.
After the equipment leaves the factory, it may
become damaged or maladjusted during transportation
or on the job. Sometimes wires are disconnected
accidentally or fan motors move on their bases due to
rough handling, causing fans to strike. The correction
of such conditions is part of start-up.
CAUTION
Before starting equipment, make certain that:
1. Correct voltage has been supplied to the equipment.
2. The electrical plug from the control box has been inserted into the receptacle.
During Start-up (applies only to standard equipment):
Note: Direction of conditioner air may be adjusted by
repositioning the discharge grille to change airflow
pattern in a room. The building superintendent or
assistant manager should be requested to make any
changes.
IM 960-1 Applied PTAC / Page 27 of 48
PTAC/PTHP Startup
Report – Audit
Job Name __________________________________________ City ________________G.O. # ____________
Installer __________________________________________________________________Total No. of Units_____
Date of Final Inspection and Start-up ________________________________________
Manufacturers’ Representative Name ___________________________________
Unit Type
□APTAC 16 × 42 □Type K
□APTAC 16 × 44 □Type J
□Enersaver
Name of Maintenance Manager Instructed ___________________________________Other__________________
Essential Items Check
A. Voltage Check _____________ Volts (measured)
B. Yes No
Condition
Yes
No
Condition
□ □ Filters Clean
□ □ Operates in Heating
□ □ Evaporator Coils/Drain Pans Clean □ □ Operates in Cooling
□ □ Wall Boxes Sealed To Wall, No Leaks □ □ Operates in Fan Only (if so equipped)
□ □ Wall Box Pitch Satisfactory
□ □ Hi-Lo Fan Speed Operational (if so equipped)
□ □ Air Discharge Free of Obstruction □ □ Fans Rotate Freely Without Striking Fan Housing
□ □ Condenser Air Free of Obstruction □ □ Cycle/Continuous Fan (if so equipped)
□ □ Other Conditions Found: ___________________________________________________________
_______________________________________________________________________________
_______________________________________________________________________________
Note: “No” answers above require notice to installer by memorandum (attached copy).
Please include any suggestions or comments: _______________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________
Above System is in Proper Working Order FOR INTERNAL USE
Release:
Date
SM ______________
CTS _____________
T________________
Sales Representative Signature
Customer Signature
Service Manager Approval
McQuay International
4900 Technology Park Boulevard, Auburn, New York 13021-9030 USA (315) 253-2771
IM 960-1 Applied PTAC / Page 28 of 48
Date
Form No. 13F-1206
Controls
Premium (Programmable) Digital Touchpad
Control Operating Instructions
LED with Program
Setting Display
9-LED Indicators
Application
The PTAC Digital Control is used to control
a PTAC Unit that includes both an integral air
conditioner and a source of heat.
The Digital Control is operated with a Touchpad.
Inputs and Outputs
•
•
•
•
•
•
•
•
•
•
•
•
Indoor coil sensor, (ICS)
Outdoor coil sensor, (OCS)
Indoor air sensor, (IAS)
Outdoor air sensor, (OAS)
Remote T’stat, T’STAT (RCWYBG)
Power supply, (24VAC)
Line voltage input, (L1, L2)
Indoor fan standby voltage, (L1STB L2STB)
Control selection, (LUI, T’STAT
Model selection, (AC/E, HP, HP/E)
Time delay bypass, (TEST)
Indoor off fan cycle, (FAN, OFF CYCLE–10, 20, 30, 1 HR)
Outputs
•
•
•
•
•
•
Compressor output, COM
Indoor fan, BLOWER LO, HI
Outdoor fan, OUTDOOR FAN
Electric heater, ELE
Reversing valve, REV VALVE
Fresh Air Damper Motor, DM
User Interface
The user will by default control the Electronic
Controller via the touchpad. The user can select with
a jumper for the unit to receive commands from a
Remote Thermostat.
8- Push Button
Display Inputs
Keys and Indicators Labels
8 Push Buttons
ON/OFF, FAN SPEED, MODE,
FAN MODE, SLEEP, PROG-ON/OFF
for
Temp buttons:
Temp UP and
for Temp DOWN
9 LED Indicators
SLEEP, COOL, COOL/DRY, FAN, HEAT, HIGH, LOW, CYCLE, CONT.
LED 2 Digit Displays No Label
Display Function Legend
Tr = Room Temperature
hI = High Room Temperature
Lo = Low Room Temperature
LA= Low Ambient Lockout
rT = Remote Thermostat Control
tP = Touchpad Control
t = Time
Ts = Temperature Setpoint
Rf = Room Freeze Condition
CF= Coil Freeze Protection
F = Fahrenheit
C = Celsius
LC= Control Lockout Mode
AU= Damper Setting (Automatic)
CL = Damper Setting (Closed)
Remote Thermostat Control
The Remote Thermostat can be any thermostat
that can interface with an electronic thermostat via
RCWYBG terminals. The Control Selection jumper
must be in T’STAT position. During a call the remote
thermostat will pass R back to the controller on a
respective terminal. The push buttons on the touchpad
become inactive in the remote thermostat mode.
However, the control pad LED display will indicate the
mode of operation, and the room temperature.
IM 960-1 Applied PTAC / Page 29 of 48
Digital Touchpad with Automatic
Changeover from Cooling to Heating &
Heating to Cooling
AUTO Programmable Mode:
•
•
•
The 2 degree deadband provides the following:
AUTO
Available with the Programmable LUI (668003801)
and Premium Board (667997301) only. The AutoChangeover 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
IM 960-1 Applied PTAC / Page 30 of 48
HEAT and COOL icons alternatively flash with
their respective programmed setpoints
The system engages cooling and heating automatically 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
• 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
Keys and Indicators Labels
ON/OFF, FAN SPEED, MODE,
FAN MODE, SLEEP, PROG-ON/OFF
for
Temp buttons:
Temp UP and
for Temp DOWN
9 LED Indicators
SLEEP, COOL, AUTO, FAN, HEAT, HIGH, LOW, CYCLE, CONT.
8 Push Buttons
LED 2 Digit Displays No Label
Controls
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 first:
AM
9:45
1.2 Adjust the time by pressing
and
buttons.
or buttons, time will
By holding pressed
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 confirmation day of the week. Numbers
represent days of the week, Monday being 1 and
so forth. TODAY will flash on display. Adjust
the number that represents the day of the week
and
buttons:
by pressing
TODAY
AM
9:45
1.4 Exit the clock set menu by pressing FAN
MODE (TIME) and FAN SPEED (DAY)
simultaneously for 5 seconds
Configuration
The configuration mode is meant for temperature scale
setting, limits for minimum and maximum operating
temperatures and displaying sensor readings. To
and
enter the configuration mode hold pressed
buttons for 5 seconds. Moving from one screen
to another and rolling over is done by pressing Mode
button.
2.2 To adjust the lower operating temperature limit
and
(cool minimum set point) press
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
and
(heat maximum set point) press
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 configuration mode by pressing
buttons for 5 seconds
and
2.1 Once in the configuration mode, the default
temperature scale will be displayed as shown
below. Toggle the temperature scale to degree
or
button:
Celsius by pressing either
IM 960-1 Applied PTAC / Page 31 of 48
Controls
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 specific conditions for each period of the day. During programming, the item that is flashing 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 or
the day screen as shown below. Press
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.
DAY1
or
3.4 By pressing
day will change.
button, the period of the MORN
3.5 To advance to the next screen, press SLEEP ( ) button. Starting time will flash. or
Adjust the starting time by pressing
buttons.
DAY1
AM
8:00
MORN
o
70
COOL
DAY1
AM
8:00
MORN
o
78
thermostat
3.8 To program the
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.
NOTICE
DAY1
HEAT
AM
8:00
MORN
3.6 To advance to the next screen, press SLEEP ( ) button. Heat temperature will be and displayed. Adjust the heat setting with
buttons.
3.7 To advance to the next screen, press SLEEP ( ) button. Cool temperature will be displayed. Adjust the cool setting with and
buttons.
IM 960-1 Applied PTAC / Page 32 of 48
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.
Controls
Remote Wall Mounted Thermostats
Wall mounted thermostats are available for the
PDAF/PDHF unit in automatic or manual changeover
styles. All include a fan switch for constant “on”
operation or “automatic” for cycle operation with the
compressor. When requested, all necessary relays
and transformers are factory mounted and ready for
attachment to field supplied low voltage wires. All
thermostats are 24-volt type and have dual Fahrenheit
and Celsius temperature setpoint scales.
Non-Programmable Heat/Cool Manual
Changeover Thermostat (107095701)
Simple to operate, single push button for one-stage
heating and cooling, or single stage heat pump. Zone
compatible, and 4- or 5 wire compatible (terminal “C”
is optional for non-heat pump systems). System “heatoff-cool” switch and fan “on-off” switch.
7-Day Programmable Manual Changeover
Thermostat (107095801)
Simple, logical programming for set-up and setback temperatures and times. Compatible with singlestage heat pump systems. Enables separate morning,
day, evening, and night settings for every day of the
week. Simpleset™ feature enables easy copying of
one day’s programming for the entire week. Select
a warmer or cooler setting any time to temporarily
override any program setting. Vacation hold overrides
programming. Clear backlit display makes it easy to
see time, temperature and setpoint – even in the dark.
No batteries required.
Figure 40. 7-Day Programmable, Manual Changeover Thermostat (107095801)
Figure 39. Non-Programmable Thermostat (107095701)
Specifications
Electrical Rating:
Specifications
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 Configurations:
•
1 stage heat, 1 stage cool or single stage electric heat pump
•
•
•
•
•
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 Configurations:
•
Single stage heat, single stage cool or single stage electric heat pump
Terminations:
•
RC, RH, C, W, Y, O, B, G
Terminations:
•
R, C, W, Y, O, B, G
IM 960-1 Applied PTAC / Page 33 of 48
Controls
Remote Wall Mounted Thermostats
Figure 41. 7-Day Programmable Thermostat
(107095901), and optional remote sensor (107096001)
Specifications
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 Configurations:
•
Single stage heat, single stage cool or single stage electric heat pump
Terminations:
•
RC, RH, C, W, Y, O, B, G
IM 960-1 Applied PTAC / Page 34 of 48
Thermostat Dimensions – 107095701,
107095801, 107095901
Remote Wall Mounted Thermostats
Remote Thermostat Control
Notes:
In terms of outputs, there are two types of thermostats:
relay contacts and solid state.
Thermostats that do not have relays are typically solid
state.
Manufacturers of solid state output thermostats include
loading resistors on their installation kits. They are
of 560 Ohm and 3W value. These resistors are meant
to load thermostat solid state outputs in order for the
output voltage to be either 0 or 24VAC, i.e. no floating
voltage. These resistors are connected from W, Y, G to
common (C), respectively.
You can wire any type of 24Vac thermostat straight
into the REMOTE T’STAT connector of PTAC control
boards, 667997101 and 667997201 (Basic and
Premium models) and the control boards will recognize
the signals from them.
The Remote Thermostat can be any thermostat
that can interface with an electronic thermostat via
RCWYBG terminals. The Control Selection jumper
must be in T’STAT position. During a call the remote
thermostat will pass R back to the controller on a
respective terminal. The push buttons on the touchpad
become inactive in the remote thermostat mode.
However, the control pad LED display will indicate
the mode of operation, and the room temperature.
Installation of Remote Mounted Thermostat
Units that are furnished with remote mounted
thermostats should be wired as shown in Figure 40.
Other considerations for this arrangement are as follows:
1. When wiring the low voltage plug and receptacle disconnect, provide enough wire to move harness out of the way for chassis removal.
2. If subbase is used, a small hole must be drilled and grommeted in the subbase front to allow passage of the low voltage wires.
3. If secondary units are to be employed, see
connections in Figure 42. The number of
secondary units that can be connected is limited to
32 units.
4. When using a programmable wall thermostat, connect it to the terminal board remote thermostat
plug. Refer to the instructions furnished with the
chosen thermostat.
Figure 42. Remote Thermostat with Primary/Secondary Control (Master/Slave) Wiring Connections
IM 960-1 Applied PTAC / Page 35 of 48
Premium (Programmable)
Digital Contol Wiring Diagram
1– Jumper Placement to Select System Module (See Jumper Detail)
A– Place jumper across AC/HYD to select Air Conditioner/Hydronic Heat.
B– Place jumper across AC/E to select Air Conditioner/Electric Heat.
C– Place jumper across AC/HYD/E to select Air Conditioner/Hydronic/Electric.
D– Place jumper across HP to select Heat Pump.
E– Place jumper across HP/E to select Heat Pump/Electric.
2– Jumper Placement to Select Fan Control:
A– When in Fan Cycle Mode, fan operates for 2 minutes – Place jumper across
10, 20, 30, or 1 HR to select fan cycle off minutes which will be overridden by the room temperature.
3– Jumper Placement to Select
Controller Type:
A– Place jumper across LUI to select unit mounted touchpad (Local User Interface).
B– Place jumper across secondary (SEC) to select secondary control by a primary unit.
C– Place jumper across T’STAT to select remote, wall mounted programmable, or non-
programmable thermostat.
4– Jumper Placement to Select
Hydronic Valve:
A– Place jumper across NO to select Normally Open Hydronic Valve.
B– Place jumper across NC to select Normally Closed Hydronic Valve.
Jumper Placement Detail
3
1
A
A
B
C
D
E
C
B
2
4
A
B
A
Wiring Diagram Legend
CT
=
DM =
CM =
IFM =
OFM =
HFLO =
OCS =
OAS =
ICS =
IAS =
LUI =
HYV =
REV =
Control Transformer
Damper Motor
Compressor Motor
Indoor Fan Motor
Outdoor Fan Motor
Heat Fan Lockout Sensor
Outdoor Coil Sensor
Outdoor Air Sensor
Indoor Coil Sensor
Indoor Air Sensor
Local User Interface
Hydronic Valve
Reversing Valve
EHC = Eletric Heat Contactor
IM 960-1 Applied PTAC / Page 36 of 48
Standard (Non-programmable)
Digital Contol Wiring Diagram
1– Jumper Placement to Select
System Module (See Jumper Detail)
A– Place jumper across AC/E to select Air Conditioner with Electric Heat.
B– Place jumper across HP to select Heat Pump.
C– Place jumper across HP/E to select Heat Pump with Electric Back-up Heat.
3– Jumper Placement to Select
Controller Type:
A– Place jumper across LUI to select unit mounted touchpad (Local User Interface).
B– Place jumper across T’STAT to select remote, wall mounted programmable, or non- programmable thermostat.
Jumper Placement Detail
3
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.
1
A
B
C
B
A
2
A
Wiring Diagram Legend
CT
CM
IFM
OFM
OCS
OAS
ICS
IAS
LUI
REV
=
=
=
=
=
=
=
=
=
=
Control Transformer
Compressor Motor
Indoor Fan Motor
Outdoor Fan Motor
Outdoor Coil Sensor
Outdoor Air Sensor
Indoor Coil Sensor
Indoor Air Sensor
Local User Interface
Reversing Valve
EHC = Eletric Heat Contactor
IM 960-1 Applied PTAC / Page 37 of 48
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.
Table A
Wire Color
WH
RD
OR
BN
Drawing No. 668001506
If the jumpers are accidentally cut, then the connections can be
spliced to substitute for the missing jumpers.
Legend
DM =
HYV =
CM =
IFM =
OFM =
HFLO =
OCS =
OAS =
ICS =
IAS =
LUI =
REV =
IR
=
C1
=
C2
=
C3
=
MP =
Damper Motor
Hydronic Valve
Compressor Motor
Indoor Fan Motor
Outdoor Fan Motor
Heat Fan Lockout Sensor
Outdoor Coil Sensor
Outdoor Air Sensor
Indoor Coil Sensor
Indoor Air Sensor
Local User Interface
Reversing Valve
IR Receiver Board (AP7810)
Indoor Motor Capacitor
Outdoor Motor Capacitor
Compressor Capacitor
Motor Protector
Note: The gray tinted areas in the wiring diagram; are options available only with the premium control board.
For the latest drawing version refer to the wiring diagram located on the inside of the controls access panel of the unit.
IM 960-1 Applied PTAC / Page 38 of 48
Voltage
120V
208V
240V
277V
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.
Legend
DM =
HYV =
CM =
IFM =
OFM =
HFLO =
OCS =
OAS =
ICS =
IAS =
LUI =
REV =
IR
=
C1
=
C2
=
C3
=
MP =
Table A
Wire Color
WH
RD
OR
BN
Voltage
120V
208V
240V
277V
Drawing No. 668001406
Damper Motor
Hydronic Valve
Compressor Motor
Indoor Fan Motor
Outdoor Fan Motor
Heat Fan Lockout Sensor
Outdoor Coil Sensor
Outdoor Air Sensor
Indoor Coil Sensor
Indoor Air Sensor
Local User Interface
Reversing Valve
IR Receiver Board (AP7810)
Indoor Motor Capacitor
Outdoor Motor Capacitor
Compressor Capacitor
Motor Protector
Note: The gray tinted areas in the wiring diagram; are options available only with the premium control board.
For the latest drawing version refer to the wiring diagram located on the inside of the controls access panel of the unit.
IM 960-1 Applied PTAC / Page 39 of 48
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 filters 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 filter maintenance than those areas of relatively clean operating or low usage conditions. Unit malfunction will occur if air filters are not kept clean. Rinse filter 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.
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, floors or walls, turn the unit off
to avoid drawing potentially damaging vapors into the
package terminal unit.
8. 9. 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.
Dry equipment thoroughly, especially electric parts and installation.
IM 960-1 Applied PTAC / Page 40 of 48
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 refineries are especially corrosive.
If the unit is to be installed in an area where
contaminants are likely to be a problem, special
attention should be given to the equipment location
and exposure.
1 Avoid having lawn sprinkler heads spray directly
in or on the outdoor louver.
2 In coastal areas, the units must have the corrosion
protection package to maintain the warranty
coverage.
Regular maintenance will reduce the buildup of
contaminants and help to protect the outdoor
section of the unit.
1
2
3
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
Regular cleaning of the cabinet with a good non-
abrasive polish will provide protection and keep it in good condition.
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
Refrigeration Cycle
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.
Every motor-driven refrigeration system operates
on the carnot cycle. A practical understanding of what
goes on at the various steps in this cycle can be a
big help to the troubleshooting mechanic. Figure 43
illustrates the refrigeration cycle. The diagram shows
what occurs in each component of a hermetically
sealed system as used in all McQuay Air Conditioning
equipment. The temperatures shown are typical
of what they might be when the air entering the
condenser (outdoor temperature) is 95°F, (350 C) and the temperature of the conditioned space is 80°F (270 C).
45°F. (7°C.)
R22 (Liquid and Gas)
to Evaporator
80°F. (27°C.)
Room Air to Evaporator
Evaporator
120°F. (49°C.) Condenser Air
to Outdoors
Capillary
Restrictor
Condenser
110°F. (43°C.)
Liquid R-410A to
Capillary
95°F. (35°C.)
Outdoor Air to Condenser
60°F. (15.5°C.)
Conditioned Air to Room
60.3 psia (416 kPa)
& 60°F. (15.5C.)
to Compressor (Gas)
Hermetic
Compressor
418.3 psig (2884.1 kPa) R-410A to Condenser (Hot Gas)
Cooling Chassis........................................................... 2
Compressor Overload Device...................................... 2
Compressor Running Capacitor................................... 2
Fan Motor. Capacitor................................................... 2
Control Board............................................................... 2
Thermostat................................................................... 2
Control Relay (if used)................................................. 2
Damper Motor (if auto damper)................................... 2
Electric Resistance Heater (if electric heat) . .............. 2
Touch-up Paint (1 pt. spray can).................................. 2
Figure 43. Refrigeration Cycle
For the current spare parts list, and applicable
prices, see your McQuay representative or write
McQuay Service, P.O. Box 1551, Minneapolis, MN
55440.
IM 960-1 Applied PTAC / Page 41 of 48
Fault and Protection Codes for Applied PDAF/PDHF Control Board
Fault code
Description
Cause for the fault
CE
Communication Error
1. Cable not plugged in properly on either LUI or relay board.
2. Defective cable.
Sh
Missing Shunt The user configurable 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 control board or heating medium >250ºF. Check for installation / connection of HFLO sensor. Should be on coil return line.
Protection code
Description
Cause for the fault
CF
Coil Freeze Protection
Indoor coil temperature has been below 32ºF for 5 minutes.
Protection feature and the displayed code are dismissed when indoor coil temperature rises above 49ºF.
Rf
Room Freeze Protection
Indoor air temperature has dropped below 41ºF. Protection feature and the displayed code are
dismissed when indoor room temperature rises at and above 50ºF.
hI
High Room Temperature
Indoor air temperature is 5 degrees above maximum setpoint limit. Protection feature and the displayed code are dismissed when indoor coil temperature rises above 50ºF.
Lo
Low Room Temperature
Indoor air temperature is 5 degrees below minimum setpoint limit.
LA
Low Ambient Lockout
Outdoor air temperature is below 25ºF.
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 – Normal Control
Displays for 5 seconds to confirm normal mode of operation when control lockout turned off. CL
Damper Closed
Control setup indicator damper is in "closed" mode.
AU
Auto Damper
Control setup indicator damper is in "automatic" mode.
AU
Auto HP/E
Control setup indicator heat pump electric is in automatic changeover mode (HP/E).
bY
HP/E Bypass
Control setup indicator, electric heat is bypassed when OCS > 40˚.
CF
Coil Freeze Protection
Indoor coil is ≤ 32˚ for at least 5 minutes. Compressor and outdoor fan stop and indoor fan continues
to run for active defrost.
rF
Room Freeze Protection
Room temperature < 41˚. Damper closes (Premium board) and unit goes into heat mode.
Lo
Coil freeze protection
Room temperature is 5˚ below set point.
Hi
Temperature Limiting
Room temperature is 5˚ above set point.
LA
Low Ambient Lockout
Unit is in cooling mode and outdoor air < 25˚. Compressor will cut out.
E1
Indoor Air Sensor
Indoor Air Thermister Failure.
E2
Indoor Coil Sensor
Indoor Coil Thermister Failure.
E3
Outdoor Coil Sensor
Outdoor Coil Thermister Failure.
E4
Outdoor Air Sensor
Outdoor Air Thermister Failure.
IM 960-1 Applied PTAC / Page 42 of 48
Troubleshooting
These items should be checked by a qualified service technician only.
Trouble
1. Blowers won’t operate on cool
2. Blowers operate on cool but compressor
does not start
Cause
a.
No power
Cure
b. Faulty touchpad switch
c. Loose connection at touchpad 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 communication card connections / replace
a. b. c. d. e. f. g. h. i. Thermostat set too high.
Heat valve is open and heat is on.
Low voltage.
Faulty touchpad switch.
Faulty connection at touchpad switch.
Defective communication card.
Loose connections at compressor terminals.
Wiring to compressor terminals defective.
Loose connections in compressor overload device.
a. b. c. d. e. f. g. h.
i. Adjust Rotate control knob to “Cooler.”
Close heat valve.
Check as above.
Replace.
Tighten.
Replace.
Tighten.
Replace.
Tighten.
j. Starting capacitor malfunctions (open circuited, short
circuited or loss of capacity).
Defective compressor motor (short circuited, open
circuited, grounded).
j. Replace.
k.
k. * Ship cooling chassis prepaid to nearest McQuay authorized warranty station.
3. Blowers run on cool and compressor starts but stops
after a short interval.
a. Operation of overload device due to overloading compressor motor.
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 compressor for short circuit. If defective, ship cooling chassis
to nearest McOuay authorized warranty station.
Blowers run on cool and compressor starts and runs, but
compressor occasionally stops (on overload device).
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 fluctuations 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. Run separate electric line to equipment Consult local
power company.
a. Open circuited blower motor.
b. Blower rubbing against its housing.
c. Bearings on blower motor seized.
a. Replace.
b. Adjust blower motor or blower wheel position.
c. Replace motor
a. Operation of the internally connected overload device
due to a short circuit in blower motor.
a. Replace motor
4.
5.
Compressor starts and runs on cool but
blowers do not run.
6. Compressor starts and runs on cool, but fan motor starts,
then stops.
b.
Windings, rubbing of blower wheel or lack of lubrication
in blower motor bearings.
b.
Consult local power company.
c. If confirmed, ship cooling chassis prepaid to nearest
McOuay authorized warranty station.
b. Adjust blower wheel or motor, or replace.
7. Equipment gives electrical shock.
a. Grounded electrical circuit.
a.
8. Insufficient cooling capacity.
a. Equipment standing too long without being run.
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. Replace motor if necessary.
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.
b. Insufficient airflow 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. Insufficient airflow through evaporator due to:
1) Dirty evaporator.
2) Ice on evaporator coils.
3) Dirty air filter.
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.
g.
Eliminate ground.
* Ship prepaid to nearest McOuay warranty
station.
IM 960-1 Applied PTAC / Page 43 of 48
Troubleshooting
These items should be checked by a qualified service technician only.
9.
Trouble
Too much cooling.
Cause
Cure
a.
b.
Thermostat set too low.
Defective thermostat
a.
b.
Adjust.
Replace.
a.
a.
Remove obstructions to water flow.
b.
c.
d.
Condensate drain from evaporator to condenser
plugged.
Insulating seals on equipment damaged.
Evaporator blower motor not up to speed.
Evaporator blower incorrectly positioned.
b.
c.
d.
Adjust or replace.
Check for correct voltage. Replace motor if necessary.
Tighten.
11. Blowers won’t operate on Heat.
a.
b.
c.
d.
e.
No power.
Heat is off (equipment with heat fan lock out).
Faulty push-button switch.
Loose connections at push-button switch.
Thermostat set too low.
a.
b.
c.
d.
e.
See No. 1.
Open heat valve or turn on heating system.
Replace.
Tighten.
Adjust. Rotate control knob to “warmer”.
12. Equipment is noisy.
a.
Blower rubbing against enclosure.
a.
b.
c.
d.
e.
f.
g.
h.
Blower motor bearings dry.
Loose blower hold-down nuts on motor-bracket
assembly
Refrigerant absorbed in compressor oil after extended
shutdown.
Equipment improperly installed.
Loose terminal box cover on side of compressor.
Loose electrical components.
Copper tubing vibrating.
b.
c.
Adjust fan position on motor shaft or reposition fan
motor bracket assembly.
Replace motor.
Align blower assembly and tighten nuts.
d.
Noise will disappear after equipment runs awhile.
e.
f.
g.
h.
Make necessary adjustments to components.
Tighten.
Fasten securely.
Occasionally equipment will have noise for no apparent 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 system until a point is found where the noise is eliminated
or reduced. Bend the copper
tubing very gently until the noise disappears.
10. “Sweating.”
13. Insufficient or no heat.
i.
Harmonics.
i.
Tighten.
a.
b.
No steam or hot water being applied.
No power.
a.
b.
c.
d.
e.
f.
g.
h.
Faulty or inoperative HFLO sensor.
Loose connection at touchpad.
Thermostat set too high.
Thermostat faulty.
No power output on transformer secondary.
Inoperative valve.
1) Steam valve N/C.
2) Hot water valve N/C.
c.
d.
e.
f.
g.
h.
Contact building management.
Check power supply line fuse, circuit breakers. Blown
fuses would indicate circuit overloading, a short circuit,
or a grounded condition in the circuit.
Replace or check location of sensor.
Replace wire or tighten connection.
Adjust.
Replace.
Replace.
1) Temporarily lock valve open; replace.
2) Replace.
Notes:
This guide was prepared with standard equipment in mind. If equipment is special, it may not be entirely applicable.
* If equipment is still in warranty.
** Note: Before trying to correct the noise, determine its cause such as conditioned air blower, compressor or condenser blower. Operate the conditioned air blowers only. If this doesn’t cause the noise, operate on cooling. Then disconnect one compressor lead. If the noise stops, the compressor is the source, If not, it is caused by the condenser blower.
IM 960-1 Applied PTAC / Page 44 of 48
Unit Weight - Chassis and Cabinet Assembly
Model
PDAF
PDAF (Packaged)
PDHF
PDHF (Packaged)
007
009
012
015
017
129.5
144.5
131.0
146.0
137.0
152.0
138.5
153.5
137.9
152.9
139.4
154.4
145.6
160.6
147.1
162.1
150.6
165.6
–
–
16˝ x 42˝ Wall Sleeve
(Packaged).................................................28 lbs. (13 kg)
Louvers
Flush-stamped...............................................6 lbs. (3 kg)
Architectural.................................................8 lbs. (3 kg)
Subbase
3" (76mm) High Electrical.........................10 lbs. (5 kg).
4" (102mm) High Electrical.....................12 lbs. (5.4 kg)
8" (203mm) High Hydronic........................20 lbs. (9 kg)
IM 960-1 Applied PTAC / Page 45 of 48
McQuay Training and Development
Now that you have made an investment in modern, efficient McQuay equipment, its care should be a high priority.
For training information on all McQuay HVAC products, please visit us at www.mcquay.com and click on training, or
call 540-248-9646 and ask for the Training Department.
Warranty
All McQuay equipment is sold pursuant to its standard terms and conditions of sale, including Limited
Product Warranty. Consult your local McQuay Representative for warranty details. Refer to Form
933-43285Y. To find your local McQuay Representative, go to www.mcquay.com.
This document contains the most current product information as of this printing. For the most up-to-date
product information, please go to www.mcquay.com.
©2009 McQuay International
(800) 432-1342
www.mcquay.com IM 960-1 Applied PTAC / 10-09 Page 48 of 48
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