McQuay Incremental PDNC Series Installation & Maintenance Data

Category
Split-system air conditioners
Type
Installation & Maintenance Data

This manual is also suitable for

Incremental
®
Comfort Conditioners
Model PDNS, PDNC
With Top-Mounted Hydronic Heat
Installation & Maintenance Data
Group: PTAC
Part No.: 106018563
Date: August 2005
IM 422-6
©2005 McQuay International
®
IM 422 / Page 2 of 28
Table of Contents
Figure 1. Exploded view of complete unit
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Wall Opening Requirements . . . . . . . . . . . . . . . . . . . . . . . . 3
Wall Sleeve Installation . . . . . . . . . . . . . . . . . . . . . . . . . . 4–6
Panel Wall With Factory Louver . . . . . . . . . . . . . . . . . . . . 4
Panel Wall With Continuous Louver . . . . . . . . . . . . . . . . . 5
Frame and Brick Construction . . . . . . . . . . . . . . . . . . . . . 6
Heat Section Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Coil Piping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Steam Coils. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Hot Water Coils . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Wall Mounted Thermostats . . . . . . . . . . . . . . . . . . . . . . . 8-9
Wireless Remote (Option) . . . . . . . . . . . . . . . . . . . . . . . . . 10
Thermostat Wiring Configurations . . . . . . . . . . . . . . . . 10-11
Anchoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Installing Louvers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Installation of Cooling Chassis . . . . . . . . . . . . . . . . . . . . . . 13
Adjusting Temperature Limiting Device . . . . . . . . . . . . . . . 13
Electrical Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Installing Room Cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Equipment Start-up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Scheduled Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Recommended Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . 15
Refrigeration Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Troubleshooting Chart . . . . . . . . . . . . . . . . . . . . . . . . . 16–17
Approximate Shipping Weights . . . . . . . . . . . . . . . . . . . . . 17
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18–27
Normally Closed Valve (Steam) . . . . . . . . . . . . . . . . . . . 18
Normally Open Valve (Hot Water) . . . . . . . . . . . . . . . . . 19
Digital Touch-pad Control Wiring . . . . . . . . . . . . . . . . . . 20
PDNS/PDNC Control Remote Thermostat
(N.O. Valve - 24V). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
PDNS/PDNC Control Unit Mounted
(N.O. Valve - 24V). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Need Heading Description . . . . . . . . . . . . . . . . . . . . . . . 23
PDNS/PDNC Control Remote Thermostat
(N.C. Valve - 24V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
PDNS/PDNC Unit Mounted Thermostat
(Manual Changeover, N.C. Valve) . . . . . . . . . . . . . . . . . 25
PDNS/PDNC Control Unit Mounted with HFLO Fan
Cycle on Heat (N.C. Valve - 24V). . . . . . . . . . . . . . . . . . 26
PDNS/PDNC Unit Mounted Thermostat
(Manual Changeover, N.C. Valve) . . . . . . . . . . . . . . . . . 27
Installation
The installation of this equipment shall be in accordance with the regulations of authorities having jurisdiction and all
applicable codes. It is the responsibility of the installer to determine and follow the applicable codes. Sheet metal parts,
self-tapping screws, clips, and such items inherently have sharp edges, and it is necessary that the installer exercise
caution. This equipment is to be installed only by an experienced installation company which employs trained
personnel.
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 acknowl-
edging the damage. The carrier should also fill out a Carrier
Inspection Report. The McQuay International Traffic Department
should then be notified.
The unit nameplate should be checked to make sure the
voltage agrees with the power supply available.
This unit is designed and built for through-the-wall installa-
tion in either new or existing buildings. The self-contained
refrigerant system delivers cooling to the desired space. Heat-
ing is accomplished with a top mounted hydronic heating coil.
Each conditioner consists of the following components:
1. Cooling Chassis — Shipped separate in a single carton.
2. Wall Sleeve — Shipped separate in a single carton or in a
multi-pack of 15.
3. Hydronic Heat Section — Shipped in a separate carton.
4. Outdoor Louver — Shipped in a separate carton.
5. Room Cabinet — Shipped in a separate carton with kickplate
attached.
IM 422 / Page 3 of 28
1
1
4" RECESS FOR ARCHITECTURAL LOUVER
“A” – IN. (MM) “D” – IN. (MM) “B” – IN. (MM)
ROOM CABINET WALL SLEEVE WALL THICKNESS
18
3
4 (476) 13
3
4 (349) 4
3
4–5
3
4 (121–146)
17
3
4 (451) 13
3
4 (349) 5
3
4–6
3
4 (146–171)
16
3
4 (425) 13
3
4 (349) 6
3
4 –7
3
4 (171–197)
15
3
4 (400) 13
3
4 (349) 7
3
4 –8
3
4 (197–222)
14
3
4 (375) 13
3
4 (349) 8
3
4 –9
3
4 (222–248)
13
3
4 (349) 13
3
4 (349) 9
3
4 –10
3
4 (248–273)
12
3
4 (324) 13
3
4 (349) 10
3
4 –11
3
4 (273–298)
11
3
4 (298) 13
3
4 (349) 11
3
4 –12
3
4 (298–324)
10
3
4 (273) 13
3
4 (349) 12
3
4 –13
3
4 (324–349)
10
3
4 (273) 14
3
4 (375) 13
3
4 –14
3
4 (349–375)
10
3
4 (273) 15
3
4 (400) 14
3
4 –15
3
4 (375–400)
10
3
4 (273) 16
3
4 (425) 15
3
4 –16
3
4 (400–425)
10
3
4 (273) 17
3
4 (451) 16
3
4 –17
3
4 (425–451)
Product Category
P = PTAC
Product Identifier
DNS = A/C w/Top-Mnt Hyd Heat
(Flat Top)
DNC = A/C w/Top-Mnt Hyd Heat &
Corrosion Protection
Design Series
1 = A Design 4 = D Design
2 = B Design 5 = E Design
3 = C Design
Nominal Capacity
007 = 7,000 015 = 15,000
009 = 9,000 016 = 16,000
012 = 12,000
Voltage
A = 115-60-1
C = 206-60-1
J = 265-60-1
S = 208-115-60-1
Coil Options
Heating Options
62 = Hydronic, normally open 63 = Hydronic, normally closed
P DNS 1 009 E Z 62 Z 12AR14 C I C 1
Note: Electrical rough-in should be located behind kickplate
(removable front) and below wall sleeve.
52" (1320mm)
1
1
2"
(38mm)
19
1
2"
(495mm)
Wall Space For Piping Rough-in
(Typ. R.H. & L.H.)
3"
(76mm) Min.
3"
(76mm)
Kickplate (Removable
Front)
7
8"
(22mm)
Wall
Thickness
“B”
“A”
1
1
4" (32mm)
2
7
8" (67mm)
16"
(406mm)
“D”
9
1
8"
(232mm)
5
1
2"
(140mm)
7
8" (22mm)
1
5
8"
(41mm)
1
5
16"
(33mm)
3" (76mm) Min.
Kickplate Height
Standard Size Wall Sleeve
Wall Opening Requirements
Before installing the unit, check the wall opening to be sure the
wall sleeve will slide into the opening unobstructed. For ma-
sonry walls, a lintel must be used to provide support over each
opening. The rough opening should measure 16
1
4" (413mm)
high x 42
1
4" (1073mm) wide. The opening must be a minimum
of 3" (76mm) above the finished floor (including carpeting).
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.
!
WARNING
Product Style
1 = 1st Style Change
SKU Type
A = Stock
B = Quick Ship
C = Tailored
Color
I = Antique Ivory
Power Connection
C = Cord
Return Air
14 = Bottom
Discharge
AR = Flat Top
Hand Orientation
Z = Not Applicable
Figure 2. Unit dimensions
Product Nomenclature
Electromechanical Controls Solid State Control
12 = Unit Mount MCO 55 = Unit Mount MCO
13 = Wall T stat 56 = Hand Held Remote Wireless
21 = Unit Mtd. MCO w/Heat 57 = Wall Mounted Remote T'stat
Fan Lockout
26 = Unit Mtd. MCO w/ GRC & NSB
24 = Unit Mtd. MCO w/NSB
IM 422 / Page 4 of 28
Wall Sleeve Installation — Thin Wall Construction
The standard wall sleeve is designed to be easily installed in
a variety of wall constructions. For panel wall and thin wall
construction, it is recommended that the optional top angle be
used and the wall sleeve be supplied with a turned down
flange (see Figure 3).
The recommended procedure for installing units in panel
wall and thin wall construction is as follows:
1. Clean the opening of all debris that may interfere with
installation.
2. Recess the wall opening so that the louver is flush with the
exterior of the building (refer to Figure 3). The center of
gravity is approximately 10
3
4" (273mm) from the rear face
of the standard wall sleeve. If a subbase is not used, field
support must be provided up to the center of gravity. This
support can be metal, wood or concrete.
3. Level wall sleeve in all directions and anchor with appro-
priate fasteners. Use holes provided (see Figure 23, page
11) or drill additional holes as required to secure firmly.
Caution: Do not drill holes in the base of the wall sleeve.
Use shims between the wall and the wall sleeve to prevent
wall sleeve distortion during anchoring.
4. Caulk the wall sleeve to the wall opening on both the
inside and outside perimeter. This can be done from the
inside of the building. Be careful not to plug the weep
holes.
Figure 3. Wall sleeve installation for thin wall construction
Notes:
** See Figure 2, page 3, for dimensions “D” and “B”.
* Dimension “X” is field determined or specified. Angle is factory welded at
given dimension when option is designated.
Optional
Continuous Flange
B**
Leveling Leg to
Support
Cabinet
Hydronic Heat
Coil Section
3-1/2" Thick
Batt Insulation
1-5/8" Metal Stud 16" O.C.
Window Stool
Insulation Wet Panel
16"
1
1
/
4
"
42"
Outdoor Side of Sleeve
X
6
3
/
8
"
Optional
Leveling Leg
13-3/4"
X*
D**
IM 422 / Page 5 of 28
Applications utilizing field supplied louvers require additional
considerations:
1. Louvers supplied by others must have 70% free area or a
pressure drop not exceeding 0.05 in. w.g. (12.45 Pa) at
300 fpm (1.524 m/sec) face velocity, and a blade design
that will not cause recirculation of air.
2. McQuay does not warrant the rain and water leakage
resistance of its equipment when used with louvers by
others.
3. All louvers by others must be approved by the manufac-
turer prior to installation.
Figure 4 illustrates a typical installation using a field
supplied, continuous louver. This method is for illustration
purposes only. Other variations may be employed as long as
they meet manufacturer’s louver specifications listed above
and so long as adequate wall support is achieved. All struc-
tural supports and fasteners (except the optional top angle
and turned down flange) are field supplied.
Installation of wall sleeves with continuous louvers is very
similar to that of applications with factory furnished louvers.
Assuming the louver meets the manufacturer’s criteria, as
stated previously, proceed to install the wall sleeve as follows:
Wall Sleeve Installation — Thin Wall Construction
1. Clean the opening of all debris that may interfere
with installation.
2. Position the wall sleeve into the wall so that it is flush with
the exterior wall. Important: If the wall sleeve has been
installed into a thick wall, make certain the wall sleeve
protrudes into the room a minimum of 1
1
8" (29mm) beyond
the finished wall surface. This is to accommodate the heat
section and room cabinet. The center of gravity is 10
3
4"
(273mm) from the rear face of the standard wall sleeve. If
no subbase is being employed, adequate support for the
wall sleeve up to the center of gravity must be provided at
the job site. This support can be wood, metal or concrete.
3. Level wall sleeve in all directions and anchor with appro-
priate fasteners using holes provided (see Figure 23, page
11), or drill additional holes as required to secure firmly.
Caution: Do not drill holes in the base of the wall sleeve.
Use shims between the wall and the wall sleeve to prevent
wall sleeve distortion during anchoring.
4. Caulk the wall sleeve to the wall opening on both the inside
and outside perimeter. This can be done from the inside of
the building. Be careful not to plug the weep holes.
Figure 4. Wall sleeve installation using top angles and field supplied continuous louver
13
3
4"
(349mm)
1
1
4"
(38mm)
Insulated
Panel
Optional
Top Angle
16"
(406mm)
Outside Edge
of Sleeve
Wall Sleeve
Turndown
Flange
(See Detail)
Finished Floor
Including Carpet
Outside Louver
By Others
Resilient
Caulking
Turndown
Flange
Resilient
Caulking
Wall
Sleeve
Wall
Frame
By Others
Optional
Top Angle
42"
(1069mm)
Optional
Subbase
16"
(406mm)
10
1
2"
(267mm)
Max.
1"
(25mm)
3"
(76mm)
Min.
Wall
Sleeve
Insulated
Panel
Notes:
1. Caulk entire perimeter of wall sleeve after installation.
2. Seal area between louver and wall sleeve to prevent con-
denser air recirculation.
3. Dimensions shown in table on page 3 do not apply to this
application.
*Dimension “X” is field determined or specified. Angle is factory
welded at given dimension when option is designated.
X*
Supports By Others
(2 Req’d.)
Min. 3
7
8"
(98mm)
IM 422 / Page 6 of 28
A heavy-gauge, corrosion resistant wall sleeve is provided
for each unit. The wall sleeve is either shipped in a separate
carton or shipped in a multi-pack of 15.
Typical installation for masonry walls is shown in Figure 5.
The recommended installation procedure for this type of con-
struction is as follows:
1. Clean the opening of all debris that may interfere with
installation.
2. Be sure the unit’s center of gravity falls within the load
bearing surface of the wall. The center of gravity for the unit
is approximately 10
3
4" (273mm) from the rear edge of the
wall sleeve. If the center of gravity is not within the load
bearing surface, then additional support such as wood, metal
or concrete must be provided in the field.
3. Place a thin pad of soft mortar on the bottom of the open-ing.
Important: Make certain the wall sleeve protrudes into the
room a minimum of 1
1
8" (29mm) beyond the finished wall
surface to accommodate the heat section and room cabinet.
Be sure to recess the wall sleeve enough to accommodate
outside louver. This recess is
3
8" (9.5mm) for stamped
louvers and 1
1
4" (32mm) for architectural louvers. The louver
should be flush to exterior surface when completed.
Wall Sleeve Installation — Thick Wall Construction
Figure 5. Wall sleeve installation using brickstops
4. If a brickstop is employed (as shown in Figure 5), slide the
wall sleeve into the wall until the brickstop contacts the
exterior bricks, as illustrated below. If a brickstop is not used,
slide the wall sleeve in the wall so that it extends into the room
a minimum of 1
1
8" (29mm) beyond the finished interior wall
surface. This allows room to attach the heat section and
room cabinet. The wall sleeve should also be recessed
enough to accommodate the outside louver.
5. After the mortar has dried, remove the masonry support from
the wall sleeve. Note: The wall sleeve is not intended to
replace the lintel.
6. Level wall sleeve in all directions and anchor with appropri-
ate fasteners (as shown in Figure 23, page 11). A
5
16" (8mm)
hole is provided on each side, 2" (51mm) down from the top
and 2" (51mm) in from the rear of the wall sleeve. It may
necessary to drill additional holes in the wall sleeve to firmly
secure it . Caution: Do not drill holes in the base of the wall
sleeve. Use shims between the wall and the wall sleeve to
prevent wall sleeve distortion during anchoring.
7. Caulk the wall sleeve to the wall opening on both the
in-side and outside perimeter using a resilient, nonhardening
caulk such as silicone. Be careful not to plug the weep holes.
Notes:
1. For dimensions B and D, see table on page 3.
2. Dimension “X” is “as required” and is usually sent to the factory to be
welded during wall sleeve fabrication.
3. Caulk entire perimeter of wall sleeve after installation.
4. Wall sleeve to extend a minimum of 1-1/4" past finished sheetrock.
5. Wall sleeve should be installed recessed 1-1/4" from face of brick so
that when louver is installed it is flush with face of building.
D
Outside
Louver
B
1"
Finished Floor
Wall Sleeve
A
Wood Stool
Casement Window with
Insulating Clear Glass
2'-6
1
2"
Exposed Projection
Concrete Slab
7-
1
4"
Brick
1'-4"
4"
2'-4"
Brick
Room Cabinet
Optional
Continuous
Flange
Outside Edge
of Sleeve
Wall
Sleeve
D
X
Optional
Brickstops
42" (1067mm)
1
1
4"
(32mm)
16"
(406mm)
IM 422 / Page 7 of 28
Heat Section Installation
The heat section is designed to be “snapped” into the top of the
wall sleeve (see Figure 6). There are four square holes pro-
vided in the wall sleeve, two on each side, for coil attachment.
Assembly the heat section to the wall sleeve as follows:
1. Unpack the heat section and inspect for any shipping
damage. Report any damage found to the carrier.
2. Check the heat section against the plans to make certain the
coil supplied has the connections match the specifications.
3. Firmly attach the heat section to the wall sleeve by lining up
the heat section hooks with the square holes supplied in the
wall sleeve. Snap the heat section in place by exerting pres-
sure downward.
4. The valve is always connected to the supply side of the coil.
There are seven possible coil arrangements available. Each
is shown below. Select the illustration below that matches
the coil supplied and pipe it according to the illustration. In-
stall valve and other accessories including air vents, steam
traps, stop balance valves, etc., as specified by the design
engIneer.
5. For valve installed on right side of the unit, make electrical
connection to matching cap extending from the control box.
For left side valve, make electrical connection to cap mounted
to left side of chassis.
Note: When the heating medium is steam, the supply connec-
tion should be attached to the uppermost tube and the return to
the lower tube. The coil is pitched in the casing to allow drain-
age of condensate.
When the heating medium is hot water, the supply connection
should be made to the lowermost tube and the return to the
uppermost tube. Hot water coils should be “flooded” to minimize
air entrapment.
Factory
Supplied
Holes (2)
Wall Sleeve
Hydronic
Heat
Section
Figure 6.
Steam
Left-hand supply and return
Supply and Return Coil Arrangements
Right-hand supply and return
Right-hand supply, left-hand return
Left-hand supply, right-hand return
Left-hand supply and return
Right-hand supply and return
Left-hand supply, right-hand return or
Right-hand supply, left-hand return
Supply
Return
Supply
Return
Return
or
Supply
Hot Water
Return
Supply
Supply
Return
Supply
Return
Supply
Return
Return
or
Supply
IM 422 / Page 8 of 28
Wall mounted thermostats are available for the PDNS/PDNC
unit in automatic or manual changeover styles. All include a fan
switch for constant “on” operation or “automatic” for cycle op-
eration with the compressor. When requested, all necessary re-
lays and transformers are factory mounted and ready for attach-
ment 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 “heat-off-cool” switch and fan “on-off”
switch.
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:
•45
o
F to 90
o
F, Accuracy: ±1
o
F
System Configurations:
•1 stage heat, 1 stage cool or single stage electric heat pump.
Terminations:
R, C, W, Y, O, B, G
7-Day Programmable Manual Changeover
Thermostat (107095801)
Simple, logical programming for set-up and set-back tem-
peratures and times. Compatible with single-stage heat pump
systems. Enables separate morning, day, evening, and night
settings for every day of the week. Simpleset™ feature enables
easy copying of one day's programming for the entire week.
Select a warmer or cooler setting any time to temporarily over-
ride 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.
Wall Mounted Thermostats
Figure 14. Non-Programmable Thermostat (107095701)
Figure 15. 7-Day Programmable, Manual Changeover
Thermostat (107095801)
Specifications
Electrical Rating:
24 VAC (18 to 30 VAC)
•1 amp maximum per terminal
•3 amp maximum total load
60-minute power backup (SC3001)
Easy access terminal block
Temperature Control Ranges:
•45
o
F to 90
o
F, Accuracy: ±1
o
F
System Configurations:
Single stage heat, single stage cool or single stage electric
heat pump
Terminations:
RC, RH, C, W, Y, O, B, G
7-Day Programmable Automatic/Manual
Changeover Thermostat (107095901)
Simple, logical programming for set-up and set-back tem-
peratures and times. Automatically switches between heating
and cooling modes. Compatible with electric (including heat
pump) systems. Programmable fan to circulate air during any
program period. Select a warmer or cooler setting any time to
temporarily override any program setting. 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. Vacation hold overrides pro-
gramming. Clear backlit display makes it easy to see time, tem-
perature and setpoint – even in the dark. Lockout feature pre-
vents unwanted tampering. Optional remote temperature sen-
sor available.
Figure 16. 7-Day Programmable Thermostat (107095901),
and optional remote sensor (107096001)
IM 422 / Page 9 of 28
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 Touch Pad.
Inputs and Outputs
The PTAC Digital Control offers the following inputs:
• Indoor Coil Sensor (ICS)
• Indoor Air Sensor (IAS)
• Outdoor Air Sensor (OAS)
• Inputs from Remote Thermostat, RBGYW
• Heat Fan Lock Out Sensor (HFLO)
• Power Supply, 24VAC
The PTAC Digital Control offers the following outputs:
• Compressor output (COM)
• Outdoor Fan (FAN)
• Indoor Fan (BLOWER HI, BLOWER LO)
• Damper Control (DAMPER)
• Hydronic Valve (HYV)
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:
•45
o
F to 90
o
F, Accuracy: ±1
o
F
System Configurations:
Single stage heat, single stage cool or single stage electric
heat pump
Terminations:
RC, RH, C, W, Y, O, B, G
PTAC/PDNS Digital Control
Keys and Indicators Labels
ON/OFF, FAN SPEED, FAN MODE,
7 Push Buttons
SLEEP, MODE
Temp buttons: Arrow Labels for
Temp UP and DOWN
9 LED Indicators
SLEEP, COOL, COOL/DRY, FAN,
HEAT, HIGH, LOW, CYCLE, CONT.
LED 2 Digit Displays
Display Function Legend
Tr = Room Temperature rT = Remote Thermostat Control
tP = Touch Pad Control t = Time
Ts = Temperature Setpoint rF = Room Freeze Condition
9- LED
Indicators
Figure 17. Digital Control
Figure 18. Digital Control Indicators
Thermostat Dimensions – 107095701,
107095801, 107095901
LED
2-Digit Display
7- Push Buttons
IM 422 / Page 10 of 28
Non-programmable Thermostat – The unit can be easily
controlled with a remote mounted, low voltage wall thermostat.
Several variations of low voltage wall thermostats are available.
These variations can be separated into two categories: Non-
programmable and Programmable. Either type of thermostat will
work with the Incremental conditioner. Figures 19–22 illustrate
the typical wiring schematics for proper connection of the units
to the wall thermostat.
Figure 19. Non-programmable Thermostat
Factory Supplied
Low Voltage
Plug & Receptacle
Disconnect
Wires From Control
Figure 20. Master/slave with Non-programmable Thermostat
Factory Supplied
Low Voltage
Plug & Receptacle
Disconnect
Wires From Control Master Unit
NOTE: When employing a slave, sever
the BK wire loop of the Slave Unit.
Wires From Control Slave Unit
Thermostat Wiring Configurations
The Remote Consists of 10 Push-buttons
Power:
Functions same as ON/OFF button on the touch pad.
Sleep:
Functions same as SLEEP button on the touch pad.
Wireless Remote Control (Optional)
Mode Buttons
• Heat, Cool, Cool/Dry, Fan:
Performs same function as the MODE button on the touch
pad, and allows user to select specific mode of operation
using only one button.
Temp Buttons +, – :
Functions same as buttons on touch pad, allowing user to
change the setpoint.
Fan Speed Buttons (High & Low):
Performs same function as the FAN SPEED button on the
touch pad, allows user to select specific speed using only
one button.
Remote must be aimed in a line of sight of the window in
upper right corner on the front panel, at less than a 45
o
angle
from center of the window.
The control board will beep when any button is pressed on
the Remote control to confirm signal.
Master/slave Operation – When using remote mounted
thermostats, it is often necessary to control more than one
Incremental conditioner from a single thermostat. Figures 20 and
22 illustrate schematically how a master unit and slave unit(s)
are connected to a single thermostat. Note that when employing
a slave unit, the BK wire loop of the slave unit is severed. This
takes the slave’s transformer out of the circuit, allowing it to du-
plicate the operation of the master unit. The master’s transformer
handles 10 VA power draw. The master and slave each draw 5
VA, therefore if more than one slave unit is to be used, the mas-
ter transformer must be replaced with a larger one. The number
of slave units that can be connected is limited to the maximum
amperage of the thermostat contacts.
IM 422 / Page 11 of 28
Programmable Thermostat The major difference in
connecting the programmable thermostat is the requirement for
the transformer common, the introduction of the thermostats
power source. The BK wire loop, shown in Figure 21, is where
power is supplied to operate the circuitry of the programmable
thermostat. The BK wire loop usually connects to the “trans-
former common” terminal of the thermostat. The position and
designation of the terminal for incoming thermostat power dif-
fers between manufacturers. Refer to the instructions furnished
with the chosen thermostat to locate the proper terminal. Note:
It may be necessary to place a larger VA transformer in the unit
when using certain programmable thermostats. Check the VA
draw of chosen thermostat to be sure it does not exceed 5 VA
power draw.
Figure 21. Programmable Thermostat
Wires From Control Slave Unit
Figure 22. Master/slave with Programmable Thermostat
Wires From Control
Factory Supplied
Low Voltage
Plug & Receptacle
Disconnect
Wires From Control Master Unit
Factory Supplied
Low Voltage
Plug & Receptacle
Disconnect
NOTE: When employing a slave, sever
the BK wire loop of the Slave Unit.
Master/slave Operation With Programmable Thermostat
Master/slave operation can also be controlled by a program-
mable thermostat. However, the connection of the master unit is
slightly different than that of the Non-programmable thermostat.
As described earlier, the programmable thermostat will need the
common to energize the electronics. This power can be sup-
plied by tapping into the BK wire loop. Note:
It may be neces-
sary to place a larger VA transformer in the unit when using
certain programmable thermostats. Check the VA draw of cho-
sen thermostat, plus the VA draw of the slave unit to be sure it
doesn’t exceed 10 VA power draw of the master transformer.
IM 422 / Page 12 of 28
Installation of Cooling Chassis
Correct installation of the cooling chassis is extremely important
to insure the proper operation of the unit. Install the chassis as
follows:
1. Remove outer carton and inspect for any shipping damage.
Report any found to the carrier.
2. Check nameplate data on chassis to insure that the correct
job site distribution has been made with respect to cooling
capacities. Generally, corner rooms require larger capaci-
ties.
3. Remove chassis from carton by pulling evenly on substan-
tial portion of unit. Caution: Do not pull on evaporator fan
housing, control box or compressor.
4. If wall sleeve has been previously installed, remove tempo-
rary weather panel.
5. Check all fasteners to make certain they have not come
loose during shipment. Do not loosen nuts holding down
compressor; they are set at the factory.
6. Do not lubricate motors before start-up. Motors are factory
lubricated. Consult “Scheduled Maintenance” section on
page 14 for lubrication instructions.
7. Place Tinnerman clips from bag onto wall sleeve. Clips and
mounting screws are enclosed in a bag attached to the top
of the condenser coil cover.
8. If louver has not been previously installed, connect to wall
sleeve as described above.
9. If louver is supplied by others, as illustrated in Figure 4,
page 5, be sure to install foam type gaskets on all sides of
the condenser coil to prevent recirculation or bypass of
condenser air.
10. Slide chassis into wall sleeve until firmly seated against
weather seals of wall sleeve. Caution: Do not push on coil
surface or control box cover. Make sure the compressor
tubing does not catch when inserting chassis.
Installation of Louvers
1. Remove louver from its shipping carton which also contains
a hardware package for mounting the louver.
2. Remove outside weather plug and weather panel from wall
sleeve.
3. Make a temporary handle by looping a piece of 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.
4. Push 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.
5. Attach washers and nuts and secure louver in place.
6. If the cooling chassis is not to be immediately installed,
replace the weather panel.
Factory
Supplied
Holes (2)
Cooling
Chassis
Damper Actuator
Hydronic Heat Sect.
Wall Sleeve
Figure 24. Installing the Cooling Chassis
11. Secure chassis to wall sleeve with four (4) sheet metal
screws packaged with the Tinnerman clips.
12. Plug electrical cord into receptacle. Excess cord should be
coiled up neatly and stored in the conditioner.
13. Set the manual damper operator in open or closed position
as desired. On units equipped with the optional electric
fresh air damper, set the “Auto-Off” switch in the desired
position. In “Auto,” the damper is open whenever the indoor
fan motor is running. The “Auto-Off” switch is located on the
bottom front face of the control box.
14. Set cycle switch (located on the bottom front face of the
control box) for constant or cycle indoor fan. With the switch
in “Cycle” position, the indoor fan will shut off when the
thermostat de-energizes cooling or heating.
15. Set the temperature limiting device to the desired range of
thermostat operation. (See page 13 for details on tem-
perature limiting device.)
Anchoring
Anchoring the wall sleeve in the opening is accomplished as
shown in Figure 23. 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 con-
tact.
A
5
16" (8mm) hole is provided on each side, 2" (51mm) down
from the top and 2" (51mm) in from the rear of the wall sleeve.
It may be necessary to drill additional holes in the wall sleeve to
firmly secure it. Caution: Do not drill holes in the base of the wall
sleeve. Use shims between the wall and the wall sleeve to pre-
vent sleeve distortion during anchoring.
Expansion
Anchor
Bolt
Molly or
Toggle Bolt
Cripple Stud
Main Stud
Wood
Screw
Figure 23. Anchoring Method
IM 422 / Page 13 of 28
Installing Room Cabinet
The room cabinet is the last piece to install. The following
instructions assume all components (wall sleeve, heat section,
louver and chassis) have been installed, piped and anchored.
All major room construction should also be complete so as not
to damage the room cabinet after it has been installed. Attach-
ing the room cabinet can be completed as follows:
1. Firmly grasp the room cabinet and lift it over the heat section.
There are notches in the back flanges of the room cabinet
that rest on the wall sleeve to assure it is centered.
2. Align the notches of the room cabinet on the wall sleeve and
firmly push the cabinet downward until it seats on the wall
sleeve (see Figure 25).
3. Screw the cabinet to the wall using the screws provided.
There are two (2) screw holes provided on each side located
on the inner flanges of the room cabinet.
4. Loosen the four (4) wing nuts on the kickplate and adjust the
kickplate the required distance to the floor.
5. Tighten the wing nuts firmly.
6. Wipe any smudges or dirt off the room cabinet using a mild
cleaner and a soft cloth.
All wiring should be in accordance with all local and National
Electrical Code requirements.
Units are supplied with an attachment cord and plug which
exit from the bottom of the conditioner on the control side. The
cord for 115V, 208V and 230V has a usable length of 72"
(1829mm) from where it exits the conditioner. The use of
extension cords to increase the length of the plug/cord set is not
recommended. Units to operate on 265V are supplied with a
Electrical Service
14" (356mm) cord for connection to a subbase.
The attachment plug size should be used to determine the
circuit ampacity and overcurrent protection. Time delay,
overcurrent protection devices are recommended to prevent
unit damage and to avoid nuisance tripping.
Outlets are generally located beneath the conditioner, on
or recessed in the wall so it is concealed by the conditioner
overhang and kickplate.
Optional Adjusting Temperature Limiting Device
As an option, a temperature limiting device can be furnished to
allow the owner to set the minimum and/or maximum tempera-
ture selections. Adjust this device as follows:
1. Remove temperature knob and metal cover plate.
2. Loosen the hold-down screw with Phillips screwdriver.
3. Adjust cams to attain desired rotation limit.
4. Tighten hold-down screw.
5. Replace metal cover and temperature knob.
Once unit is in operation, rotate knob to maximum heat
and/or maximum cool to check temperature limits. Repeat
procedure listed above until desired temperature limitations
are achieved.
Figure 25.
IM 422 / Page 14 of 28
Initial start-up of the Incremental
®
conditioners by
experienced personnel is usually the responsibility of the
installing contractor. This start-up consists 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 the
owner’s agent. Note that unless otherwise specifically agreed
to in writing, no field labor, start-up service or the like is included
in the price of the equipment. After the equipment leaves the
factory, it may become damaged or maladjusted during trans-
portation 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 condi-
tions is part of the start-up.
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):
1. Set manual ventilation damper to OPEN or CLOSED posi-
Equipment Start-up
tion as required by owner. Set “Auto-Off” switch as re-
quired if unit is equipped with electric fresh air damper.
2. Push HIGH button to preselect fan speed. Push HEAT
button. Move thermostat to the extreme heating position
(counterclockwise). If the “Cycle/Constant” switch is placed
in the “Cycle” position, heat and indoor fan motor should
cycle on and off as the thermostat requires. Push LOW
button. Fan should change to low speed.
3. Push HIGH button to preselect fan speed. Push COOL
button. Move thermostat to the extreme cooling position
(clockwise). Compressor and indoor fan motor should
cycle on and off as the thermostat requires. Push LOW
button. Fan should change to lower speed. Outdoor fan
should be on whenever compressor operates.
4. Push FAN button. Indoor fan should operate at high or low
speed as selected. Neither heater nor compressor should
continue to operate.
5. Push OFF or STBY button. Fan should stop, and neither
heater nor compressor should continue to operate.
Incremental
®
conditioners are built to last. With proper care, the
unit should provide uninterrupted service for many years. Sched-
uled maintenance of this equipment, as described below, is the
key to the equipment’s longevity.
1. 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 may occur if air
filters are not kept clean.
2. McQuay recommends that every year the chassis be re-
moved for a thorough checkup. This should be
completed as follows:
a. Unplug unit from power source.
b. Remove front panel and unplug valve from control box.
c. Vacuum heating coil to remove any accumulated dust.
d. Remove chassis from cabinet and move it to the
maintenance department. Replace with spare chassis or
weather plate.
e. Check all seals and insulation and repair as required.
f. Check all wiring and controls for hazardous conditions.
Scheduled Maintenance
g. Cover motors and control module with watertight
material and wash evaporator coil, condenser coil and
base pan using hot water and a mild soap. Do not use a
harsh detergent for it may corrode the aluminum fins.
h. Clean condensate drain and clear weep holes.
i. Dry equipment thoroughly, especially electric parts and
insulation.
j. Clean any rust spots with steel wool and paint with rust
inhibiting paint.
k. Clean insulation or replace if necessary.
l. Check all fasteners and tighten as required.
m.Clean and oil damper door and linkage.
n. All fan motors are permanently lubricated by the manu-
facturer. They do not require further lubrication.
o. Test run chassis before re-installing or returning to spare
parts stock.
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.
!
WARNING
IM 422 / Page 15 of 28
An inherent advantage of the Incremental system is that
failure of any one part affects only one Incremental condi-
tioner 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 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 replace-
ment of a defective part is possible. The defective part can
then be returned to McQuay or one of its authorized service
stations. So long as it is still in warranty, it is repaired or
replaced and returned to the owner without cost for shop labor
and material. Thus, the stock of replacement parts is con-
stantly replenished. To the right is listed the kind of parts
which McQuay recommends be carried in stock, together with
the quantity of parts recommended per 100 Incremental
conditioners installed.
Recommended Spare Parts
Qty. Per
Part Name 100 Units
Cooling Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Compressor Overload Device . . . . . . . . . . . . . . . . . . 1
Compressor Running Capacitor . . . . . . . . . . . . . . . . . 1
Evaporator Fan Motor. . . . . . . . . . . . . . . . . . . . . . . . . 1
Condenser Fan Motor. . . . . . . . . . . . . . . . . . . . . . . . . 1
Pushbutton Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Damper Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Knob for Thermostat. . . . . . . . . . . . . . . . . . . . . . . . . . 6
Control Relay (if used) . . . . . . . . . . . . . . . . . . . . . . . . 1
Damper Motor (if used). . . . . . . . . . . . . . . . . . . . . . . . 2
Touch-up Paint (1 pt. spray can) . . . . . . . . . . . . . . . . 1
For the current spare parts list and applicable prices, see your
McQuay representative or write McQuayService, P.O. Box
1551, Minneapolis, MN 55440.
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 trouble-
shooting mechanic. Figure 26 illustrates the refrigeration
cycle. The diagram shows what occurs in each component of
Refrigeration Cycle
a hermetically sealed system, as used in all McQuay equip-
ment. The temperatures shown are typical of what they might
be when the air entering the condenser (outdoor tempera-
ture) is 95°F (35°C) and the temperature of the conditioned
space is 75°F to 80°F (24° C to 27°C).
Figure 26. Refrigeration cycle
45°F (7°C) R-22
(Liquid & Gas)
To Evaporator
Capillary
Restrictor
120°F (49°C) Condenser Air
To Outdoors
80°F (27°C) Room Air
To Evaporator
285.3 psia (2059 kPa)
R-22 To Condenser
(Hot Gas)
94°F (35°C) Outdoor Air
To Condenser
60.3 psia (416 kPa) R-22
and 60°F (15.5°C)
To Compressor (Gas)
50°F (15.5°C) Conditioned
Air To Room
Hermetic Compressor
Condenser
Evaporator
110°F (43°C)
Liquid R-22
To Capillary
IM 422 / Page 16 of 28
a. Check supply line fuses, circuit breakers, and be sure the
power is on. Blown fuses would indicate circuit overloading, a
short circuit, or a grounded condition in the circuit. Voltage
supply to the equipment should be checked. Voltage must
be within 10% of voltage given on data plate.
b. Replace.
c. Tighten.
a. Adjust. Rotate control knob to “Cooler.”
b. Close heat valve.
c. Check as above.
d. Replace.
e. Tighten.
f. Replace.
g. Tighten.
h. Replace.
i. Tighten.
j. Replace.
k. *Replace cooling chassis prepaid to nearest McQuay
authorized warranty station.
a. Check voltage supply. Clean condenser inside and out.
Check at outside face of condenser for recirculation of
condenser air. Put air “splitters” in, if missing. Check to make
sure condenser blower/fan is operating properly. Check
compressor for short circuit. If defective, *ship cooling
chassis to nearest McQuay authorized warranty station.
a. Run separate electric line to equipment. Consult local power
company.
b. Consult local power company.
c. If confirmed, ship cooling chassis prepaid to nearest McQuay
authorized warranty station.
a. Replace.
b. Replace.
c. Adjust blower motor or blower wheel position.
d. Replace motor
e. Tighten.
a. Adjust blower/fan wheel on shaft or blower motor mounting.
b. Adjust blower wheel or motor or replace wheel.
a. Eliminate ground.
a. If the air conditioner is allowed to stand for an extended
length of time without being run on COOL, it is possible for all
the refrigerant to become absorbed in the oil inside the
compressor and refrigeration circuit. If this should happen,
there will be no cooling until the necessary working
pressures have been established. This will take about 5
minutes of continuous running.
b.
1) Clean.
2) Remove obstructions.
3) Check same as in the case of malfunctioning
conditioner air blower.
4) Check for correct voltage. Replace blower motor if
necessary.
5) Adjust blower position and tighten setscrew.
6) Correct as in No. 3 above.
c.
1) Clean.
2) Turn equipment off to let ice melt.
3) Clean or replace.
4) Remove obstructions. In case of top discharge
equipment, make sure books, magazines, etc., are kept
off the equipment.
5) Check as in No. 1.
6) Check for correct voltage. Replace motor if necessary.
7) Adjust motor wheel position and tighten setscrew.
d. Refer to original load calculations; recalculate heat load.
e. Close therm.
Troubleshooting Chart
These items should be checked by a qualified service techician only.
TROUBLE CAUSE CURE
1. Blowers won’t operate
on COOL.
2. Blowers operate on
COOL but compressor
doesn’t start.
3. Blowers run on COOL
and compressor starts
but stops after a short
interval.
4. Blowers run on COOL
and compressor starts
and runs, but compres-
sor occasionally stops
(on overload device).
5. Compressor starts and
runs on COOL but
blowers do not run.
6. Compressor starts and
runs on COOL but
blowers do not run.
7. Equipment gives
electrical shock.
8. Insufficient cooling
capacity.
a. No power.
b. Faulty pushbutton switch.
c. Loose connections at pushbutton switch.
a. Thermostat set too high.
b. Heat valve is open and heat is on.
c. Low voltage.
d. Fault pushbutton switch.
e. Faulty connection at pushbutton switch.
f. Defective wiring to thermostat.
g. Loose connections at compressor terminals.
h. Wiring to compressor terminals defective.
i. Loose connections in compressor overload device.
j. Starting capacitor malfunctions (open circuited, short
circuited or loss of capacity.
k. Defective compressor motor (short circuited, open
circuited, grounded).
a. Operation of overload device due to overloading
compressor motor.
a. Low voltage due to overloaded 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 at low load periods of the day.
c. Partial short circuit in compressor motor. Under normal
loading a compressor with a partial short circuit might
appear to be operating all right; increased condensing air
temperature might then cause a short.
a. Faulty pushbutton switch.
b. Open circuited blower motor.
c. Blower rubbing against its housing.
d. Bearings on blower motor seized.
e. Loose connection at pushbutton switch.
a. Operation of the internally connected overload device
due to a short circuit in blower motor.
b. Windings, rubbing of blower wheel or lack of lubrication
in blower motor bearings.
a. Grounded electrical circuit.
a. Equipment standing too long without being run.
b. Insufficient airflow through condenser due to:
1) Dirty condenser.
2) Obstructed louvers 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 blower slipping on motor shaft.
d. Heat load in room exceeds capacity of equipment.
e. Windows and doors in room are open.
IM 422 / Page 17 of 28
TROUBLE CAUSE CURE
8. Insufficient cooling
capacity (continued).
9. Too much cooling.
10. “Sweating”
11. Blowers won’t operate
on HEAT.
12. **Equipment is noisy.
13. Insufficient or no heat.
f. Compressor not pumping, indicated by:
1) Low wattage.
2) Condenser not warm, evaporator only partially cool or
not at all.
g. Restricted capillary tube or strainer, indicated by:
1) Frost on capillary or strainer.
2) Low wattage.
3) Condenser not warm.
4) Evaporator partially frosted, only partially cool or not at
all.
a. Thermostat set too low.
b. Defective thermostat.
a. Condensate drain from evaporator to condenser plugged.
b. Insulating seals on equipment damaged.
c. Evaporator blower motor not up to speed.
d. Evaporator blower incorrectly positioned.
a. No power.
b. Heat is off (equipment with heat fan lockout).
c. Faulty pushbutton switch.
d. Loose connections at pushbutton switch.
e. Thermostat set too low.
a. Blower rubbing against enclosure.
b. Blower motor bearings are dry.
c. Loose blower hold-down nuts on motor-bracket assembly.
d. Refrigerant absorbed in compressor oil after extended
shutdown.
e. Equipment improperly installed.
f. Damper solenoid hums.
g. Loose terminal box cover on side of compressor.
h. Loose electrical components.
i. Copper tubing vibrating.
j. Harmonics.
k. Loose sheet metal parts.
a. No steam or hot water being applied.
b. No power.
c. Faulty pushbutton switch.
d. Loose connection at pushbutton switch.
e. Thermostat set too high.
f. Thermostat faulty.
g. No power output on transformer secondary.
h. Inoperative valve.
1) Steam valve N/C.
2) Hot water valve N/O.
f. *Ship prepaid to nearest McQuay authorized warranty station.
g. 4) *Ship prepaid to nearest McQuay warranty station.
a. Adjust.
b. Replace.
a. See No. 1.
b. Open heat valve or turn on heating system.
c. Check for correct voltage. Replace motor if necessary.
d. Adjust.
a. See No. 1.
b. Open heat valve or turn on heating system.
c. Replace.
d. Tighten.
e. Adjust. Rotate control knob to “Warmer.”
a. Adjust fan position on motor shaft or reposition fan motor
bracket assembly.
b. Replace motor.
c. Align blower assembly and tighten nuts.
d. Noise will disappear after equipment runs awhile.
e. Make necessary adjustments to components.
f. Check for proper adjustment. Apply silicone oil or grease to
gap between solenoid and armature.
g. Tighten.
h. Fasten securely.
i. Adjust by bending or applying tape.
j. Occasionally equipment will have noisy operation for no ap-
parent reason. Inspection has revealed no loose components
that might be the source of the noise. Due to the action of the
compressor, it is possible to have internal noise develop if the
refrigerant tubing has become bent even slightly. To distin-
guish 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 disap-
pears.
k. Tighten.
a. Contact building management.
b. Check power supply line fuses, circuit breakers. Blown fuses
would indicate circuit overloading, a short circuit, or a grounded
condition in the circuit.
c. Replace.
d. Replace wire or tighten.
e. Adjust rotate knob to “Warm.”
f. Replace.
g. Replace.
h.
1) Temporary lock valve open; replace.
2) Replace.
Troubleshooting Chart
These items should be checked by a qualified service techician only.
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: 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.
Chassis:
Size 007 . . . . . . . . . . . . . . . . . . . . . . . . . . . 141 lbs. (64 kg)
Size 009 . . . . . . . . . . . . . . . . . . . . . . . . . . . 145 lbs. (66 kg)
Size 012 . . . . . . . . . . . . . . . . . . . . . . . . . . . 149 lbs. (68 kg)
Size 015 . . . . . . . . . . . . . . . . . . . . . . . . . . . 153 lbs. (69 kg)
Wall Sleeve: Uninsulated . . . . . . . . . . . . . . 36 lbs. (16 kg)
Hydronic Heat Section:
Steam . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 lbs. (5 kg)
Hot Water . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 lbs. (5 kg)
Room Cabinets:
Standard 10
3
4" (273mm) depth . . . . . . . . . . 60 lbs. (27 kg)
For each additional inch of room cabinet depth add 4 lbs. (2 kg)
to the standard depth cabinet.
Louvers: Architectural . . . . . . . . . . . . . . . . . . . 8 lbs. (4 kg)
Approximate Shipping Weights
IM 422 / Page 18 of 28
Wiring Diagram — Standard Manual Changeover Control
(Hydronic Heat With Normally Open Valve)
Model ................................ PDNS/PDNC
Thermostat.................... Unit
Heat .............................. Water
Changeover .................. Manual
IM 422 / Page 19 of 28
Wiring Diagram — Standard Manual Changeover Control
(Hydronic Heat With Normally Closed Valve)
Model ................................ PDNS/PDNC
Thermostat.................... Unit
Heat .............................. Steam
Changeover .................. Manual
IM 422 / Page 20 of 28
PDNS/PDNC Wiring Diagram
Unit Mounted Digital Touch Pad Control - First Release
  • Page 1 1
  • Page 2 2
  • Page 3 3
  • Page 4 4
  • Page 5 5
  • Page 6 6
  • Page 7 7
  • Page 8 8
  • Page 9 9
  • Page 10 10
  • Page 11 11
  • Page 12 12
  • Page 13 13
  • Page 14 14
  • Page 15 15
  • Page 16 16
  • Page 17 17
  • Page 18 18
  • Page 19 19
  • Page 20 20
  • Page 21 21
  • Page 22 22
  • Page 23 23
  • Page 24 24
  • Page 25 25
  • Page 26 26
  • Page 27 27
  • Page 28 28

McQuay Incremental PDNC Series Installation & Maintenance Data

Category
Split-system air conditioners
Type
Installation & Maintenance Data
This manual is also suitable for

Ask a question and I''ll find the answer in the document

Finding information in a document is now easier with AI