McQuay Type K Incremental Packaged Terminal Air Conditioner, Incremental Packaged Terminal Maintenance Manual

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Installation & Maintenance Data

Group: PTAC

Part No.: 669729001

Date: March 2010

Type K Incremental Packaged Terminal Air Conditioner

Incremental™ Room Conditioner with R-410A Refrigerant

IM 1068

Table of Contents

Inspection ................................................................................2

Model Nomenclature ...............................................................3

Wall Opening Requirements ....................................................4

Wall Box Installation ................................................................5

Outdoor Louver Installation .....................................................6

Heat Section Installation (Sizes 007-012) .........................6-7

Heat Section Installation (Size 019) .....................................8

Cooling Chassis Installation ................................................9

Electric Power Wiring

Units with Electric Heat (Sizes 007-012 ....................

Units with Hydronic Heat (Sizes 007-012) Units with Hydronic Heat (Size 019)

Room Cabinet and Control Installation .............................14-15

Equipment Start-up .............................................................15

Ventilation .......................................................................

Remote Mounted Thermostat Installation ..............................16

Typical Wiring Diagrams ................................................17-25

Standard Chassis w/Elect Heat & MCO Controls

(Sizes 007–012) .............................................................

Standard Chassis w/Elect Heat & MCO Controls

(Size 019) .......................................................................

.................12-13

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

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 acknowledging the damage.

10-11

Standard Chassis w/Hot Water Heat & MCO Controls

(Sizes 007–012) .............................................................

Standard Chassis w/Hot Water Heat & MCO Controls

(Size 019) .......................................................................

Standard Chassis w/Steam Heat & MCO Controls

(Sizes 007–012) .............................................................

Standard Chassis w/ Steam Heat & MCO Controls

(Size 019) .......................................................................

Standard Chassis w/ Electric Heat & 24V Wall Stat

(Sizes 007–012) .............................................................

Standard Chassis w/Elect Heat & 24V Wall Stat

(Sizes 007–012) .............................................................

Standard Chassis w/Steam Heat & 24V Wall Stat

(Sizes 007–012) .............................................................

Scheduled Maintenance ........................................................26

Recommended Spare Parts ..................................................27

Troubleshooting Chart .....................................................28-29

Approximate Shipping Weights ............................................ 30

The carrier should also ll out a Carrier Inspection Report. The McQuay International Trafc Department should then be

contacted.

The unit nameplate should be checked to make sure the voltage agrees with the power supply available.

The Type K Series Comfort Conditioner is designed and built

for through-the-wall installation in either new or existing buildings. The self-contained refrigerant system delivers cooling to the desired space. Heating can be accomplished with electric resistance or hydronic heat. Each conditioner consists of the following components:

● Cooling Chassis ● Room Cabinet

● Heat Section ● Wall Box

● Control ● Louver

Figure 1: Type K Unit Components

IM 1068 / Page 2 of 32

Model Nomenclature

P KES 2 007 C Z 41 Z 12 AR 14 A I C 1

Model

Product Category

P = PTAC

Product Style

1= 1st Style Change

Product Identier KES = Type K, Cool Chassis Only KEI = Type K Cool Chassis Only, IAQ KEC = Type K Cool Chassis Only, Corrosion Protection KHS = Type K Heat Section Only

Design Series 1 = A design 2 = B design

Nominal Capacity - Btuh

007 = 7000 009 = 9000 012 = 12000 019 = 19000

Voltage

A = 115-60-1 C = 208-60-1 G = 230-60-1 J = 277/265-60-1 S = 208-115-60-1 R = 265-115-60-1

Coil Options Z = None

Heating Options

35 = 2.5 kW nominal 41 = 3.5 kW nominal 44 = 4.0 kW nominal 48 = 5.0 kW nominal 50 = 7.7 kW nominal 62 = Hydronic - Normally Open Valve (Hot Water) 63 = Hydronic - Normally Closed Valve (Steam)

SKU A = Stock B = Standard Delivery C = Extended Lead time

Color I = Antique Ivory

Power Connection A = Junction Box

Return Air/Outdoor Air 14 = Bottom

Discharge

AR = Flat Top

Controls

12 = Unit Mounted Manual Change Over (MCO) 24 = Unit Mounted Manual Change Over w/Night Set Back (NSB) 27 = 24V Wall T'stat w/Guest Room Control (GRC) & Night Set Back (NSB) 32 = 24V Wall T'stat w/Night Set back(NSB)

Hand Orientation

A = Same Hand Left B = Same Hand Right N = LH Supply / RH Return P = RH Supply / LH Return Z = Not Applicable

Note: Availability of voltages, heating options, and controls may vary amongst unit sizes. Consult your McQuay representative.

IM 1068 / Page 3 of 32

Wall Opening Requirements

Before installing the unit, check the wall opening to be sure

the wall sleeve will slide in unobstructed. The rough opening should measure 25'' x 36½'' (635mm x 927mm) indoors and 14½" x 36½" (368mm x 927mm) outdoors for sizes 007–012

and 27¾''x 46¾'' (705mm x 1187mm) indoors and 16⅜" x 46¾"

outdoors (415mm x 1187mm) outdoors for sizes 019 as shown

below. The wall box is designed to be mounted on the oor but may be located above the oor line to clear obstructions. Without cabinet modications, the wall box can be placed up to 1'' (25mm) above the oor. The standard adjustable kickplate can be telescoped to hide the space below the wall box. Complete

wall box installation instructions can found on page 5.

Figure 2: Unit and Wall Box Opening Dimensions

CAUTION

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.

Table 1: Unit Dimension

Dimensions – Inches

Unit Size A B C D E F G H J K L M N P R

007–012 48 2½ Min. 7¼ Min. 36¼ 5¾ 24½ 13 019 60 2½Min. 8½Min. 46¼ 6⅞ 27⅜ 15⅞ 24 4-6Adj. 3 9¼ 5/8 59½ 27¾ 46¾

Dimensions – mm

Unit Size A B C D E F G H J K L M N P R

007–012 1219 64 Min. 184 Min. 921 146 648 348 533 89-140 Adj. 44 203 25 1162 635 927 019 1524 64 Min. 216 Min. 1175 175 695 403 610 102-152 Adj. 76 235 16 1151 705 1187

⁄16 21 31⁄2-5½ Adj. 1¾ 8 1 45¾ 25 36½

IM 1068 / Page 4 of 32

Wall Box Installation

The wall thickness will determine how much, if any, of the wall box will protrude into the room. Figure 3 shows a typical installation in a frame and brick wall. These instructions will

vary by depth of wall, but not by wall material. Do not

remove the weather panel at any time during the installation of the wall box. Premature removal of this panel could result in improper leveling or sealing. Install the wall box as follows:

5. Place 2'' (51mm) berglass batt or 1" (25mm) Styrofoam

insulation around the top and sides of the wall box.

6. Locate the wall box in the wall opening with the weather

panel to the outside. Use the top edge of the wall box for horizontal leveling. The wall box must also be vertically

plumb. Shim the wall box to accomplish this. Recess so louver is ush with outside wall.

7. Drill four (4) holes in the sides of the wall box and attach

it to the walls securely using appropriate fasteners.

1. If the wall opening has not been made, cut and break through using care to leave interior and exterior surfaces undamaged. See wall opening requirements on page 4 for proper size.

2. Install lintels as shown on the plans and specications.

3. If the wall opening has already been made, measure it to

be certain it has adequate clearance for the wall box. Be

sure to allow extra clearance for insulation around the

wall box to reduce sound and heat transfer. Continue with

step #4.

4. Apply a layer of mortar or roong cement to the bottom

surface of the opening (see Figure 3).

Table 2: Wall Box Dimensions

Dimension “A” 007–012 019

in. mm in. mm in. mm

0 to -1 0 to -25 8 0 to +1 0 to +25 9 1 to 2 25 to 51 10 2 to 3 51 to 76 11 3 to 4 76 to 102 12 4 to 5 102 to 127 13 5 to 6 127 to 152 14 6 to 7 152 to 178 15 7 to 8 178 to 203 16 8 to 9 203 to 229 17

Dimension “C” – Cabinet Depth

⁄4 210 — —

⁄4 235 81⁄2 216

⁄4 260 91⁄2 241

⁄4 286 101⁄2 267

⁄4 311 111⁄2 292

⁄4 327 121⁄2 318

⁄4 362 131⁄2 343

⁄4 387 141⁄2 368

⁄4 413 151⁄2 394

⁄4 438 161⁄2 419

Note: Never drill through bottom of wall box.

8. If face brick is being installed, continue coursing up the wall until the wall box is completely surrounded and becomes an integral part of the wall.

9. Caulk interior and exterior perimeter weather tight where

the box meets the wall. Use a non hardening, waterproof caulk such as silicone.

Note: For rooms with thick carpet, wall box should be

installed 1/2'' (13mm) above concrete oor to facilitate

future chassis installation and removal.

Figure 3: Wall Box End View (Drawing Not To Scale)

NOTICE

Dimension “B” will vary by the thickness of the wall, the louver, the amount

the louver is recessed into the wall (if any) and the amount the wall box extends into the room. The minimum “B” dimension is 21⁄2'' (64mm). The wall box can be factory furnished in increments between 21⁄2'' (64mm) and 10'' (254mm). Wall box extensions in 1'' (25mm) increments can also be provided to attach to the rear of the wall box.

Table 3: Wall Box “B” Dimension

Dimensions — inches

Wall Box 007–012 21⁄2 31⁄2 4 5 6 7 8 9 10 “B” Dimension 019 21⁄2 31⁄2 41⁄2 51⁄2 61⁄2 71⁄2 81⁄2 91⁄2 101⁄ 007–012 101⁄2 111⁄2 12 13 14 15 16 17 18

Overall Length

Dimensions — mm

Wall Box 007–012 64 89 102 127 152 178 203 229 254 “B” Dimension 019 64 89 114 140 165 191 216 241 267 007–012 267 292 305 330 356 381 406 432 457

Overall Length

019 113⁄4 123⁄4 133⁄4 143⁄4 153⁄4 163⁄4 173⁄4 183⁄4 193⁄

019 298 324 349 375 400 425 451 476 502

IM 1068 / Page 5 of 32

Outdoor Louver Installation

1. Remove the louver from the shipping carton which also

contains the mounting hardware.

2. Remove the weather panel from the wall sleeve to gain

access to the outside of the wall box. Verify that gap between exterior wall and wall box is caulked.

3. If an optional louver frame is required, install prior to

louver installation. Caulk that portion of the frame which

will come in contact with the wall. Pass the louver frame through the wall box opening and from the outside of the building, slide over the end of the wall box. Position as desired, then drill holes through the top and sides of the overlapping wall box and louver frame. Secure to the

wall with screws. Caulk wall box/louver frame joint on

all four sides. Provide additional caulking around outside wall and louver frame to ensure a weather tight seal.

4. Make a temporary handle by looping a piece of exible

wire or heavy cord through the louver. This will insure

that a rm grasp can be maintained during installation.

5. From a position inside the room, push the louver through

the opening at the rear of the wall box. Line it up with the

wall box and pull it back so the louver studs pass through

the holes of the wall box ange (see Figure 4).

6. Attach the washers and nuts to secure the louver in place.

7. If heat section and cool chassis are not to be immediately installed, replace the weather panel.

Figure 4: Louver Installation

Heat Section Installation (Sizes 007-012)

The Type K heat section is matched to the Type K cooling

chassis but packaged and shipped separately. Check the

heat section carton label and the unit’s nameplate to ensure it is correct for the cooling chassis and the space. The following steps should be followed when installing the heat section:

1. Remove the heater from the shipping carton and examine for concealed damage. Report any damage found to the

carrier. The control is packaged with the heat section

in a separate carton. Remove this carton from the heat

section and set it aside until after the heat section is installed.

2. Manually spin the blowers to make sure there is no interference. Minor misalignment may have occurred during shipping and should be corrected. If it can’t be corrected with minor adjustment, the condition should be

reported to the factory. Do not lubricate room side motor

at this time. Each unit is adequately lubricated before leaving the factory.

3. Observe the method of installation. The heat section has

side channels that ride on rails in the wall box. At the

back of the wall box towards the top are two hooks

that engage the heat section. Locate these hooks before

sliding the heat section in place. “U”-shaped clips are included that lock the heat section in place once installed. “U”-clips can usually be found taped to the wall box interior.

4. Remove the weather panel from the wall box. If the

louver has not been installed, install it before placing the heat section into the wall box.

Figure 5: Heat Section Installation

5. Slide the heat section into place so that the holes of the

heat section surround the hooks of the wall box. Lock it

to the wall box using the “U”-shaped clips provided (see

Figure 5). The “U”-shaped clips should be positioned

with the open end pointing down.

IM 1068 / Page 6 of 32

6. The piping for steam or hot water can be supplied from either the right or left side of the coil. Hot water must be supplied to the bottom of the coil, and steam to the top of

the coil. See Detail A through H for specics. To simplify connections to the coil, use 5/8'' O.D. copper tubing

where local codes allow.

7. A shutoff valve is recommended on the supply and return side of the coil.

8. When steam is used, a trap is required on the return side. Trap size should be determined by the consulting engineer or steam trap supplier, depending upon the type

of system and the pressure applied.

When hot water is used, an air vent must be installed at the highest point in the piping connection. If the vent is not automatic, it should be piped with easy access for

regular maintenance. Caution: Locate vent so it does

not drip or spray on electrical components.

9. Insulate all exposed water or steam lines that are located within the room cabinet. Failure to do this may cause erratic operation of the thermostat.

10. Protect the heat section from damage during

construction. Do not operate the heat section without a

lter or the warranty will be void.

Figure 6: Suggested Piping Arrangements

in. mm 489 552 540 267 597 514

S T U V W Y

191⁄

213⁄4 211⁄4 101⁄2 231⁄2 201⁄

Hot Water Supply Steam Supply Detail A — Hot water supply R.H., return L.H. Detail B — Steam supply R.H., return L.H.

Return Stub

25/8"

(67mm)

(51mm)

Return Stub

(51mm)

Detail C — Hot water supply R.H., return R.H. Detail D — Steam supply R.H., return R.H.

Return

Stub

(25mm)

(51mm)

Return Stub

(51mm)

(25mm)

25/8"

(67mm)

Detail E — Hot water supply L.H., return R.H. Detail F — Steam supply L.H., return R.H.

(51mm)

Return Stub

25/8"

(67mm)

Detail G — Hot water supply L.H., return L.H. Detail H — Steam supply L.H., return L.H.

2" (51mm)

1" (25mm)

Return Stub

(25mm)

(51mm)

Return Stub

(51mm)

Return Stub

IM 1068 / Page 7 of 32

25/8"

(67mm)

Heat Section Installation (Size 019)

Figure 7 shows the heat section installed in a standard wall box. Note that the heat section slides into a wall box on the slide rails. For heat section installation, proceed as follows:

1. Remove heat section from shipping carton.

2. Visually check for shipping damage and report any visible damage immediately to the trucker. Spin blower wheels by hand to assure they do not rub within their housing. Shipping may have loosened mounts. Adjust as required.

3. Check voltage rating on data plate fastened to heat

section. This must conform to voltage supplied for the equipment.

4. Locate slide rails on each side of wall box and insert

heater section into the wall box. Slide to the rear until it

is rmly seated.

5. Screw in the heat section lock screws as shown in Figure

7. (Screws are shipped with the heat section.)

Figure 7: Heat Section Installed in Wall Box

WARNING

If the heat section is used for heating an area during construction,

specicallyplastering,precautionsmustbetakentoprotectthe

equipment by using covers of corrugated board, sheet metal or

plywood.Iftheinstallationspeciesheatonly,besuretoinstall permanentweatherpanelandlteradapter(see“Installationof

Heating Only Option”). Failure to heed this warning can cause malfunction of the equipment.

Figure 8: Rough-in Piping Connections Locations

Figure 9: Hot Water Coil

Steam or Hot Water Application (Size 019)

When the heat section requires steam or hot water, the installation varies. See Figures 9 and 10 for suggested piping arrangements.

1. Supply and return piping for steam or hot water is supplied from right-hand side only. Hot water must be supplied to the bottom of the coil, and steam to the top of the coil.

2. To simplify the steam or hot water connections to the

coil, use 5/8'' O.D. copper tubing where local codes

permit. See Figure 8 for rough-in dimensions.

3. When hot water is to be used, an air vent must be put in at the highest point in the piping connection. See Figure

9. If the air vent used is not of the automatic type, it should be piped so that it may be easily opened.

4. A shutoff valve is recommended on the supply and return

side of the coil. A steam trap is required on the return

side when steam is used for heating. See Figure 10.

5. All steam or hot water lines which are located within the

room cabinet should be insulated.

IM 1068 / Page 8 of 32

Figure 10: Steam Coil

Cooling Chassis Installation

1. Remove the cooling chassis from the shipping carton and examine it for damage. Do not rest it on end. Check the

plate rating against the power supply to make sure that they are the same (Figure 11). Also check the size

(capacity) to make sure that it coincides with the heat section; e.g., Size 009 cooling.

2. The cooling chassis is supplied with an internal spring mounted compressor. The hold-down nuts on the

compressor mountings should not be loosened.

3. Manually spin the condenser fan wheel to be sure that there is no interference or looseness. If it is loose, tighten

the setscrew located over the center of the at on the

motor shaft. Do not lubricate condenser fan motor at time

of installation.

Figure 11: Cooling Chassis Details

4. Slide the chassis into the wall box. Chassis must be

square in the box so that all the rubber seals are pressed

tight. Check bottom seal between chassis and wall box to

ensure that it has not been unseated from slot during

chassis installation.

5. For unit size 019, there is a “J” bolt on each side that holds the chassis in place. Thread the “J” bolts through the holes supplied in the chassis and tighten until

the chassis is rmly seated in the wall box.

IM 1068 / Page 9 of 32

Electric Power Wiring

Before making any electrical connections, observe the

following precautions:

1. Check the nameplate rating of the heat section and

cooling chassis to make sure the equipment is connected to the proper power supply and that proper fusing is used.

a. By installing a remote double-pole switch in the

conditioner’s power line within sight of the unit.

b. By installing a double pole, single throw “on-off”

switch located in a convenient position within the

room cabinet.

After all these precautions are observed, proceed as follows:

2. In cases where a number of conditioners are to be installed, single circuits should be provided for each machine.

3. A separate disconnect is recommended for each

conditioner in addition to individual fusing. This can be accomplished in several ways:

Figure 12: Electric Heat Section (Sizes 007 through 012)



Notes:

 Guest room control, low voltage or master-slave wiring connection made at

control box.

 4" × 24" (102mm × 51mm) wall space for electrical conduits except behind

junction box.

 Junction box with knockouts for 1/2'' (12mm) 3/4'' (19mm) conduit.

 See Table 5 for dimension B.



Front View

Units With Electric Heat (Sizes 007–012)

A 4" x 4" electrical junction box is located on the left side of the heat section. Field wiring should be brought to this point for power to the unit. See Figure 12 & 13.

(203mm)

Long Control

Box



Table 4: Electric Heat Section Dimensions

A D E F G H J K M

in. mm 1162 940 451 622 348 581 254 233 38

Room Cabinet



Room Cabinet Mounting Holes (4)

⁄2''

(12mm)

Wall Box

⁄4''

(6mm)

Heat Section

Power Cord

Cooling Chassis Power Cord

Side View

453⁄4 37 173⁄4 241⁄2 1311⁄16 227⁄8 10 93⁄16 11⁄

Table 5: Wall Box “B” Dimensions

Wall Box Size 21⁄2" 31⁄2" “B” Dimension 007–012 64 mm 89 mm 102 mm 127 mm 152 mm 178 mm 203 mm 229 mm 254 mm

IM 1068 / Page 10 of 32

4" 5" 6" 7" 8" 9" 10"

Figure 13: Electric Heat Section (Size 019)

Control Box

Room Cabinet



Main Power Cord

Heat Chassis

Power Cord

Room

Cabinet Mounting Holes (4)

Cool Chassis

Power Cord

4" x 4" Junction Box

Front View

(Mounted by Others) Field Mounted to L.H. Edge of Wall Box

Table 6: Electric Heat Section Dimensions

in. mm 1511 1175 695 403 749

Notes:

 Guest room control, low voltage or master-slave wiring connection made at

 See Table 7 for dimension B.

A D F G H

591⁄

461⁄4 273⁄8 157⁄8 291⁄

control box.

Long Control Box 

Cool

Chassis

Power

Cord

Heat Section

Power Cord

91/4"

(203 mm)



Wall Box

(End View

w/o Cabinet)

Side View

Table 7: Wall Box “B” Dimensions

Wall Box Size 21⁄2" 31⁄2" “B” Dimension 019 64 mm 89 mm 102 mm 127 mm 152 mm 178 mm 203 mm 229 mm 254 mm

4" 5" 6" 7" 8" 9" 10"

IM 1068 / Page 11 of 32

Units With Hydronic Heat (Sizes 007–012)

The hydronic heat section can be supplied with a short (4¼'' high) control box or a long (13½'' high) control box depending on the number of options selected. Observe the control box to determine which one was supplied for the job.

Long Control Box

1. If the long control box was provided, make electrical

connections to a eld supplied junction box that should

be fastened to the oor beneath the control

(Figure 15).

Short Control Box

If the short control box was supplied, eld wiring should be

brought into the 2'' x 4'' junction box which is located on the right-hand side of the heat section (Figure 14.)

2. Locate the long control box. The power wires for the control extend through the piece of exible conduit that

exits from the bottom of the control. These wires should

be connected to the incoming power at the junction box

installed in Step 1.

Remote Control — For units with remote mounted

thermostat, refer to page 14.

Figure 14: Hydronic Heat Section with Short Control Box (Sizes 007-012)

The short control box is used with standard unit mounted manual changeover control, and unit mounted manual changeover with emergency standby (ESB) power supply.



Hydronic Coil

Short

Control Box

Room Cabinet

Room Cabinet Mounting Holes (4)

(203mm)



Wall Box

Front View

Junction Box



Room Cabinet Removed

⁄2''

(12mm)

Side View

Table 8: Hydronic Heat Section with Short Control Box Dimensions

in. mm 1162 940 648 622 348 581 254 406 114 38 375 44

Notes:

 See Detail A, B, C, D, E. F, G, or H on page 7 for dimensions of factory installed valve and return piping stub.  Junction box 7/8" (22mm) diameter knockouts for 1/2" (12mm) conduit.  See Table 9 for dimension B.

A D E F G H J K L M N P

453⁄

37 251⁄2 241⁄2 1311⁄16 227⁄8 10 16 41⁄2 11⁄2 143⁄4 13⁄

Table 9: Wall Box “B” Dimensions

Wall Box Size 21⁄2" 31⁄2" “B” Dimension 007–012 64 mm 89 mm 102 mm 127 mm 152 mm 178 mm 203 mm 229 mm 254 mm

4" 5" 6" 7" 8" 9" 10"

⁄4''

(6mm)

IM 1068 / Page 12 of 32

Figure 15: Hydronic Heat Section with Long Control Box (Sizes 007-012)

The long control box is used with optional special controls such as Guest Room Control (GRC), Night Setback (NSB), and remote thermostats. Note: Left-hand piping must be used with the long control box design.



Hydronic Coil

Front View

Cool Chassis Power Cord

Junction Box (By Others)

Table 10: Hydronic Heat Section with Long Control Box Dimensions

A D E F G H J K L M

453⁄

in. mm 1162 940 648 622 348 581 254 406 114 38

Notes:

 See details G and H on page 7 for dimensions of factory installed valve and return piping stub.  See Table 9 on page 12 for dimension B.

37 251⁄2 241⁄2 1311⁄16 227⁄8 10 16 41⁄2 11⁄

Long

Control Box

Room Cabinet

Room Cabinet Mounting Holes (4)

Heat Chassis

Power Cord

Flexible Conduit Power Supply Cord

(203mm)



Wall Box

⁄2''

(12mm)

⁄4'' (6mm)

Side View

Room Cabinet Removed

Unit with Hydronic Heat (size 019)

1. Only one size control box is available for size 019. Make all electrical connections to a factory supplied

junction box located on the L.H. side of the wall box

(Figure 16).

Figure 16: Units with Hydronic Heat (Size 019)

Control Box

Room Cabinet

Main Power Cord

Heat Chassis

Power Cord

Room

Cabinet

Mounting

Holes (4)

Cool Chassis

Power Cord

Front View

4" x 4" Junction Box (Mounted by Others) Field Mounted to L.H. Edge of Wall Box

Notes:

 RefertoTable7onpage11for“B”dimension.

Coil Stubs for Field Piping

Long

Control

Box

Cool

Chassis

Power

Cord

Heat Chassis

Power Cord



Wall Box

(End View

w/o Cabinet)

Side View

IM 1068 / Page 13 of 32

Room Cabinet and Control Installation

The depth of the room cabinet varies by the amount the wall

box extends into the room. Check the unit tagging against the

room cabinet tagging to be sure they match. Installation of the control box should be done at the same time as the room cabinet.

1. Remove the cabinet from the carton and inspect it for

damage. If any is found, contact the carrier immediately. The room cabinet is made up of six pieces: a cabinet, a removable front panel, a discharge grille, two (2) end plates, and a kickplate. Make sure all pieces are included with the room cabinet (Figure 18).

Remove the front panel by lifting it slightly and pulling

forward, then upwards and out from the surrounding cabinet. Unit size 019 utilizes safety chains that must be disconnected from the room cabinet in order to remove the front panel.

If necessary, remove the tie bar located at the bottom of

the front panel, unlock the latch at each end and lift the bar out (Figure 17)

Figure 18: Unit Cabinet Assembly Details

4. Fasten the two (2) end plates to the room cabinet using the wing nuts supplied. These end plates are adjustable

and should be positioned to set at on the nished oor

(Figure 19).

Figure 17: Release Concealed Latch

2. For unit sizes 007–012: Place the cabinet around the installed wall box, heat

section and cool chassis and push the cabinet rmly

against the wall. The discharge grille seals should rest on the discharge opening of the heat section.

For unit size 019: Position the room cabinet over the heat section so that the

two studs on each side are positioned over the matching slots in the heat section. Set the cabinet down on the heat section, push tight against the wall and secure using wing nuts supplied. See Figure 18.

Figure 19: Unit Cabinet Assembly Details

5. Locate the kick plate and clip it into the slots provided in the end plates so that the ange is toward the oor.

6. Take the control box and escutcheon plate out of the carton for attachment to the room cabinet.

7. There are two anges beneath the control door that support the control box (Figure 20). Remove the two

screws in the control box that hold the escutcheon plate

in place. Remove the thermostat knob and escutcheon

plate.

3. Fasten the cabinet to the wall using appropriate fasteners.

The back anges of the room cabinet have factory

furnished holes for securing the cabinet to the wall.

IM 1068 / Page 14 of 32

Figure 20: Remove the Escutcheon Plate and Control Knob

8. While holding the control box in position, set the

escutcheon plate in place on the anges beneath the

control door.

9. Using the two screws removed in Step 7, secure the control box and escutcheon plate to the room cabinet.

10. Replace the thermostat control knob.

11. Connect the power cord from the heat section to the

bottom of the control box. Plug in the cord from the control box to the receptacle in the cooling chassis.

12. Move the thermostat bulb to the cooling chassis and

secure it to the snap clips provided. Inspect the lter to be

sure it is securely in place.

13. Loosen the wing nuts on the nose piece that is attached

to the heat section. Slide the nose piece toward the room cabinet until it makes contact. Tighten wing nuts to secure the nose piece in place. This nose piece prevents air from leaking back into the cabinet and giving the thermostat a false reading.

14. Before replacing the front panel, replace the tie bar (if it

has been removed) and lock the latches. Then retrieve the front panel and replace it by sliding it in and downward

into the room cabinet. See gure 21.

Note: Tie bar latches must be in and locked before installing the front panel.

15. Wipe cabinet with a soft cloth to remove smudges. If required, use a mild, nonabrasive cleanser.

Figure 21: Unit Cabinet Assembly Details

Equipment Start-up

Initial start-up of the McQuay equipment by an experienced person is usually the responsibility of the installing contractor. This consists of inspecting and operating the equipment for all functions at the time of initial installation, and making adjustments as necessary. It also includes demonstrating its proper operation to the owners or their agents.

Note: That unless otherwise specically agreed to in writing, there is no eld labor or start-up service

included in the price of the equipment.

The Type K unit is furnished with a concealed fan cycle

rocker switch on the control box. Before start-up, open the

front panel and place this switch in the “cycle” position.

Continue start-up procedures as follows:

1. Check the main power supply to be sure there is power to

the unit.

2. Open the control access door and press the button labeled F-Fan. The indoor fans should be energized.

3. Move the fan speed rocker switch from “Low Fan”

to “High Fan” and back again. The fan speed should change.

4. Depress the button marked H-Heat. Turn the thermostat

knob completely counterclockwise. The electric heat elements or the hydronic valve should become energized and noticeable heat should be felt at the discharge grille.

5. Depress the C-Cool button and move the thermostat

completely clockwise. The compressor and condenser fan should come on and the air from the discharge should

feel cold.

6. Depress the S-Stop button and all functions of the unit

should stop.

CAUTION

The stop button does not disconnect power to the unit. Before servicing the equipment, disconnect the unit from the power source.

IM 1068 / Page 15 of 32

Ventilation

The introduction of outside air is controlled by an automatic

damper. During normal operation, the damper will be open whenever the Heat, Cool, or Fan control buttons are

depressed. If the indoor fan is not energized, the damper will be closed. A concealed cutoff switch is provided so that the damper can be kept closed. This switch is located at the front left-hand side of the cooling chassis (Figure 12). It can be reached by removing the front panel.

The master unit is furnished with a 50 VA transformer that is capable of handling up to 7 slave units. If

additional slave units are to be added, a larger eld

supplied transformer must be mounted external to the unit. The master and slave units draw 5.6 VA each. Furnish a transformer to handle the number of slaves installed, plus the master unit.

2. When using a programmable wall thermostat, connect the common terminal of the thermostat to terminal A of the

unit terminal board. Refer to the instructions furnished

with the thermostat to locate the common terminal.

Remote Mounted Thermostat Installation (Sizes 007–012 Only)

Units that are furnished with remote mounted thermostats should be wired as shown in Figure 22. The connections for

Note: It may be necessary to reduce the number of

slave units connected to the master or eld supply

a larger transformer when using a programmable thermostat.

eld wiring are on a seven-position terminal board located on

the face of the control box. Other considerations for remote mounted thermostat are as follows:

Check the VA draw of the chosen thermostat, plus the

VA draw of the master and slave units to be sure the total doesn’t exceed 50 VA power draw. Slave units are

1. If slave units are to be employed, remove the jumper

connected as described in #1 above.

from terminals A to C of the slave unit. Connect terminal

A of the master unit to the corresponding terminal A of the slave unit as shown in Figure 22.

Figure 22: Remote Mounted Thermostat Wiring Connections

Manual Changeover Thermostat Automatic Changeover Thermostat Thermostat Part No. 0046736101 Thermostat Part No. 0060685101

Subbase Part No. 0046742100 Subbase Part No. 0002005963

IM 1068 / Page 16 of 32

TC1 Room Thermostat

TC2 Night Setback Thermostat (NSB)

TC3 Heat Fan Lockout

TC4 Low Ambient Lockout

VM Valve Motor

WN Wire Nut

R4 Relay, Guest Room Control (GRC)

R5 Relay, Hot Water Valve

R6 Relay, Control

R7 Relay, Night Setback (NSB)

S1 Control Switch

S2 Fan Speed Switch

S3 Fan Cycle Switch

S4 Damper Switch

T1 Transformer

TB1 Terminal Block, Control Box

C1 Capacitor, Indoor Fan

C2 Capacitor, Outdoor Fan

C3 Capacitor, Compressor

GRC Guest Room Control

HL High Limit

HTR Heater

MP Motor Protector

NSP Night Setback Control

P1 Plug, Control Box/Heat Section

to Cool Section

TB2 Terminal Board (24V), Control Box

TB3 Terminal Board, Heat Section

TB4 Terminal Board, Cool Section

TB6 Terminal Box

R1 Relay, Heat

R2 Relay, Cool

R3 Relay, Night Setback (NSB)

Typical Wiring Diagrams

Standard Chassis With Electric Heat & MCO Controls (Sizes 007—012)

COOL SECTION CONTROL BOX HEAT SECTION

S1 Switch Contact Positions

Unit Mounted Manual Changeover

Catalog 1068 / Page 17 of 32

TC1 Room Thermostat

TC2 Night Setback Thermostat (NSB)

TC5 Freezestat

VM Valve Motor

WN Wire Nut

Note: Large heat shown. Refer to unit diagram for

details of small or medium heat.

R3 Relay, Cooling

R4 Relay, Indoor Fan Motor

R5 Relay Heating 1st Stage

R6 Relay, Heating 2nd Stage

R7 Relay, Night Setback (NSB)

R9 Relay, Hot Water Valve

S1 Control Switch

S4 Damper Switch

T1 Transformer

TB2 Terminal Box

TB3 Terminal Box

TB4 Terminal Box

TB5 Terminal Box

TB6 Terminal Box

C1 Capacitor, Indoor Fan

C2 Capacitor, Outdoor Fan

C3 Capacitor, Compressor

F1 Fuse

HL High Limit

HTR Heater

MP Motor Protector

P1 Plug, Heat Section to Cool Section

P2 Plug, Heat Section to Control Box

P3 Plug, PC Board

P4 Plug, on Master Wire Harness

P5 Plug, on Master Wire Harness

R1 Relay, Run

R2 Relay, Outdoor Fan Motor

Standard Chassis With Electric Heat & MCO Controls (Size 019)

COOL SECTION CONTROL BOX HEAT SECTION

Catalog 1068 / Page 18 of 32

S1 Switch Contact Positions

Unit Mounted Manual Changeover

TC1 Room Thermostat

TC2 Night Setback Thermostat (NSB)

TC3 Heat Fan Lockout

TC4 Low Ambient Lockout

VM Valve Motor

WN Wire Nut

R4 Relay, Guest Room Control (GRC)

R5 Relay, Hot Water Valve

R6 Relay, Control

R7 Relay, Night Setback (NSB)

S1 Control Switch

S2 Fan Speed Switch

S3 Fan Cycle Switch

S4 Damper Switch

T1 Transformer

TB1 Terminal Block, Control Box

C1 Capacitor, Indoor Fan

C2 Capacitor, Outdoor Fan

C3 Capacitor, Compressor

GRC Guest Room Control

HL High Limit

HTR Heater

MP Motor Protector

NSP Night Setback Control

P1 Plug, Control Box/Heat Section

to Cool Section

TB2 Terminal Board (24V), Control Box

TB3 Terminal Board, Heat Section

TB4 Terminal Board, Cool Section

TB6 Terminal Box

R1 Relay, Heat

R2 Relay, Cool

R3 Relay, Night Setback (NSB)

Standard Chassis With Hot Water Heat & MCO Controls (Sizes 007—012)

COOL SECTION HEAT SECTION CONTROL BOX

S1 Switch Contact Positions

Unit Mounted Manual Changeover

Catalog 1068 / Page 19 of 32

TC1 Room Thermostat

TC2 Night Setback Thermostat (NSB)

TC5 Freezestat

VM Valve Motor

WN Wire Nut

R3 Relay, Cooling

R4 Relay, Indoor Fan Motor

R5 Relay Heating 1st Stage

R6 Relay, Heating 2nd Stage

R7 Relay, Night Setback (NSB)

R9 Relay, Hot Water Valve

S1 Control Switch

C1 Capacitor, Indoor Fan

C2 Capacitor, Outdoor Fan

C3 Capacitor, Compressor

F1 Fuse

HL High Limit

HTR Heater

MP Motor Protector

S4 Damper Switch

T1 Transformer

TB2 Terminal Box

TB3 Terminal Box

TB4 Terminal Box

TB5 Terminal Box

TB6 Terminal Box

P1 Plug, Heat Section to Cool Section

P2 Plug, Heat Section to Control Box

P3 Plug, PC Board

P4 Plug, on Master Wire Harness

P5 Plug, on Master Wire Harness

R1 Relay, Run

R2 Relay, Outdoor Fan Motor

Standard Chassis With Hot Water & MCO Controls (Size 019)

COOL SECTION CONTROL BOX HEAT SECTION

Catalog 1068 / Page 20 of 32

S1 Switch Contact Positions

Unit Mounted Manual Changeover

TC1 Room Thermostat

TC2 Night Setback Thermostat (NSB)

TC3 Heat Fan Lockout

TC4 Low Ambient Lockout

VM Valve Motor

WN Wire Nut

R4 Relay, Guest Room Control (GRC)

R5 Relay, Hot Water Valve

R6 Relay, Control

R7 Relay, Night Setback (NSB)

S1 Control Switch

S2 Fan Speed Switch

S3 Fan Cycle Switch

S4 Damper Switch

T1 Transformer

TB1 Terminal Block, Control Box

C1 Capacitor, Indoor Fan

C2 Capacitor, Outdoor Fan

C3 Capacitor, Compressor

GRC Guest Room Control

HL High Limit

HTR Heater

MP Motor Protector

NSP Night Setback Control

P1 Plug, Control Box/Heat Section

to Cool Section

TB2 Terminal Board (24V), Control Box

TB3 Terminal Board, Heat Section

TB4 Terminal Board, Cool Section

TB6 Terminal Box

R1 Relay, Heat

R2 Relay, Cool

R3 Relay, Night Setback (NSB)

Standard Chassis With Steam Heat & MCO Controls (Sizes 007—012)

COOL SECTION HEAT SECTION CONTROL BOX

S1 Switch Contact Positions

Unit Mounted Manual Changeover

Catalog 1068 / Page 21 of 32

TC1 Room Thermostat

TC2 Night Setback Thermostat (NSB)

TC5 Freezestat

VM Valve Motor

WN Wire Nut

R3 Relay, Cooling

R4 Relay, Indoor Fan Motor

R5 Relay Heating 1st Stage

R6 Relay, Heating 2nd Stage

R7 Relay, Night Setback (NSB)

R9 Relay, Hot Water Valve

S1 Control Switch

C1 Capacitor, Indoor Fan

C2 Capacitor, Outdoor Fan

C3 Capacitor, Compressor

F1 Fuse

HL High Limit

HTR Heater

MP Motor Protector

S4 Damper Switch

T1 Transformer

TB2 Terminal Box

TB3 Terminal Box

TB4 Terminal Box

TB5 Terminal Box

TB6 Terminal Box

P1 Plug, Heat Section to Cool Section

P2 Plug, Heat Section to Control Box

P3 Plug, PC Board

P4 Plug, on Master Wire Harness

P5 Plug, on Master Wire Harness

R1 Relay, Run

R2 Relay, Outdoor Fan Motor

Standard Chassis With Steam Heat & MCO Controls (Size 019)

COOL SECTION CONTROL BOX HEAT SECTION

Catalog 1068 / Page 22 of 32

S1 Switch Contact Positions

Unit Mounted Manual Changeover

Standard Chassis With Electric Heat & 24V Wall Stat (Sizes 007—012)

TC2 Night Setback Thermostat (NSB)

TC3 Heat Fan Lockout

TC4 Low Ambient Lockout

VM Valve Motor

WN Wire Nut

R4 Relay, Guest Room Control (GRC)

R5 Relay, Hot Water Valve

R6 Relay, Control

R7 Relay, Night Setback (NSB)

S2 Fan Speed Switch

S3 Fan Cycle Switch

S4 Damper Switch

T1 Transformer

TB1 Terminal Block, Control Box

TB2 Terminal Board (24V), Control Box

C1 Capacitor, Indoor Fan

C2 Capacitor, Outdoor Fan

C3 Capacitor, Compressor

GRC Guest Room Control

HL High Limit

HTR Heater

MP Motor Protector

NSP Night Setback Control

P1 Plug, Control Box/Heat Section

to Cool Section

TB3 Terminal Board, Heat Section

TB4 Terminal Board, Cool Section

TB6 Terminal Box

TC1 Room Thermostat

R1 Relay, Heat

R2 Relay, Cool

R3 Relay, Night Setback (NSB)

COOL SECTION CONTROL BOX HEAT SECTION

Catalog 1068 / Page 23 of 32

TC1 Room Thermostat

TC2 Night Setback Thermostat (NSB)

TC3 Heat Fan Lockout

TC4 Low Ambient Lockout

VM Valve Motor

WN Wire Nut

R4 Relay, Guest Room Control (GRC)

R5 Relay, Hot Water Valve

R6 Relay, Control

R7 Relay, Night Setback (NSB)

S1 Control Switch

S2 Fan Speed Switch

S3 Fan Cycle Switch

S4 Damper Switch

T1 Transformer

TB1 Terminal Block, Control Box

C1 Capacitor, Indoor Fan

C2 Capacitor, Outdoor Fan

C3 Capacitor, Compressor

GRC Guest Room Control

HL High Limit

HTR Heater

MP Motor Protector

NSP Night Setback Control

P1 Plug, Control Box/Heat Section

to Cool Section

TB2 Terminal Board (24V), Control Box

TB3 Terminal Board, Heat Section

TB4 Terminal Board, Cool Section

TB6 Terminal Box

R1 Relay, Heat

R2 Relay, Cool

R3 Relay, Night Setback (NSB)

Standard Chassis With Hot Water Heat & 24V Wall Stat (Sizes 007—012)

COOL SECTION CONTROL BOX HEAT SECTION

Catalog 1068 / Page 24 of 32

TC1 Room Thermostat

TC2 Night Setback Thermostat (NSB)

TC3 Heat Fan Lockout

TC4 Low Ambient Lockout

VM Valve Motor

WN Wire Nut

R4 Relay, Guest Room Control (GRC)

R5 Relay, Hot Water Valve

R6 Relay, Control

R7 Relay, Night Setback (NSB)

S1 Control Switch

S2 Fan Speed Switch

S3 Fan Cycle Switch

S4 Damper Switch

T1 Transformer

TB1 Terminal Block, Control Box

C1 Capacitor, Indoor Fan

C2 Capacitor, Outdoor Fan

C3 Capacitor, Compressor

GRC Guest Room Control

HL High Limit

HTR Heater

MP Motor Protector

NSP Night Setback Control

P1 Plug, Control Box/Heat Section

to Cool Section

TB2 Terminal Board (24V), Control Box

TB3 Terminal Board, Heat Section

TB4 Terminal Board, Cool Section

TB6 Terminal Box

R1 Relay, Heat

R2 Relay, Cool

R3 Relay, Night Setback (NSB)

Standard Chassis With Steam Heat & 24V Wall Stat (Sizes 007—012)

COOL SECTION CONTROL BOX HEAT SECTION

Catalog 1068 / Page 25 of 32

Scheduled Maintenance

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.

Air lters must be cleaned at regular intervals. Twice

annually may be adequate in some areas while twice monthly may be required in others. Areas with high dirt and lint

content or heavy usage of units require more frequent lter

maintenance that those areas of relatively clean operating or low usage conditions. Unit malfunction may occur if air

lters are not kept clean. The standard lter supplied with the Type K unit is a permanent wire mesh type. This type of lter should be rinsed with hot water and a mild detergent. Let dry and oil lightly to

enhance dust collecting ability.

The Type K is also available with a carbon lter, a zeolite lter or electrostatic lter. The electrostatic lter is renewable

by rinsing with hot water and replacing in the unit once dry.

The carbon or zeolite lters must be discarded and replaced.

The frequency of this replacement depends on the air quality

of the room being ltered. Rooms with heavy smoke or ammonia content will require more frequent lter changes

than rooms with minimal degrees of smoke or ammonia.

3. Unplug the chassis from the control box and remove the

chassis from the wall sleeve. Replace with spare chassis

or weatherplate.

4. Move chassis to maintenance area and check all seals, wires, and insulation and repair as required.

5. Cover motor and protect all electrical components before

washing dirt from chassis.

6. Clean condensate drain and clear weep holes.

7. Dry equipment thoroughly, especially electric parts and

insulation.

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

inhibiting paint.

9. Check all fasteners and tighten if necessary.

10. Check the motor nameplate for routine oiling

instructions.

11. Test run chassis before reinstalling or returning to spare parts stock.

Note: When replacing the standard lter with an optional carbon, electrostatic, or zeolite lter, compress the lter brackets slightly. The optional lters are slightly thinner than the standard lter and will stay in place

better if the brackets are squeezed slightly.

It is recommended that the chassis be removed every year for a thorough check-up. The heat section need not be removed but should be inspected or cleaned if necessary. Should the heat section blowers or motor need service, the entire fan board can be easily removed from the unit for service. To access the unit for cleaning or service, proceed as follows:

WARNING

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

carpets,oorsorwalls,turntheunitofftoavoiddrawingpotentially

damaging vapors into the package terminal unit.

1. Disconnect power to the unit.

2. Remove the front panel and the kickplate.

IM 1068 / Page 26 of 32

Recommended Spare Parts

An advantage of the Incremental system is that failure of any one 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 a defective part is possible. The defective part can then be returned to McQuay International 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 constantly replenished. To the right is listed the kind of parts which McQuay International recommends be carried in stock, together with the quantity of parts recommended per 100 Incremental conditioners installed.

Qty. Per Part Name 100 Units

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

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

Compressor Running Capacity .......................................1

Indoor Fan Motor ............................................................1

Outdoor Fan Motor .........................................................1

Outdoor Fan Motor Capacitor .........................................1

Push button Switch .........................................................2

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

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

Knob for Thermostat .......................................................6

Control Relay ..................................................................2

Damper Motor .................................................................2

Hydronic Valve ...............................................................4

Spare Filter ....................................................................10

Touch-up Paint (1 Pt. Spray Can) ...................................1

For the current spare parts list, and applicable prices, see our

McQuay representative or write McQuayService, P.O Box

1551, Minneapolis, MN 55440.

IM 1068 / Page 27 of 32

Troubleshooting Chart

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

Trouble Cause Cure

1. Blowers won't operate on Cool.

2. Blowers operate on Cool, but compressor does not start.

3. Blowers run on Cool and compressor starts, but stops after a short interval.

a. No power.

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

a. Thermostat set too high. b. Heat valve is open and heat is on. c. Low voltage. d. Faulty push-button switch. e. Faulty connection at push-button switch. f. Defective wiring to thermostat. g. Loose connections at compressor terminals. h. Wiring to compressor terminals defective. i. Loose connections in compressor overload device. j. Starting capacitor malfunctions (open circuited, short circuited or loss of capacity). k. Defective compressor motor (short circuited, open circuited, grounded).

a. Operation of overload device due to overloaded compressor motor.

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 under load 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. *Ship 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.

4. Blowers run on Cool and compressor starts and runs, but compressor occasionally stops (on overload device).

5. Compressor starts and runs on Cool, but blowers do not run.

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

7. Equipment gives electrical shock.

8. Insufcientcooling

capacity.

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uctuations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 push-button switch. b. Open circuited blower motor. c. Blower rubbing against its housing. d. Bearings on blower motor seized.

e. Loose connection at push-button switch.

a. Operation of the internally connected overload device due to a short circuit in blower motor. b. Windings, rubbing of blower motor or lack of lubrication in blower motor bearings.

a. Grounded electrical circuit.

a. Equipment standing too long without being run.

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

1) Dirty condenser.

2) 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. Insufcientairowthroughevaporatordueto:

1) Dirty evaporator.

2) Ice on evaporator coils.

 3)Dirtyairlter.

4) Obstructed discharge grilles.

5) Evaporator blower motor not running.

6) Evaporator blower motor not up to speed.

7) Evaporator motor slipping on motor shaft.

a. Run separate electric line to equipment. Consult local power company.

b. Consult local power company.

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

authorized warranty station.

a. Replace. b. Replace. c. Adjust blower motor or blower wheel position. d. Lubricate motor with SAE #10 oil. (It may be necessary to remove blower assembly to do this.) e. Tighten.

a. Adjust blower/fan wheel on shaft or blower motor mounting. Lubricate with SAE #10 oil (see above). 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) Correct as in #5.

4) Check for correct voltage. Oil blower motor if necessary.

5) Adjust blower position and tighten setscrew.

6) Correct as in #3. c.

1) Clean.

2) Turn equipment off to let ice melt.

3) Clean or replace.

4) Remove obstructions.

5) Correct as in #1.

6) Check for correct voltage. Oil motor is necessary.

7) Adjust blower wheel position and tighten setscrew.

*If equipment is in warranty.

IM 1068 / Page 28 of 32

Troubleshooting Chart

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

Trouble Cause Cure

8. Insufcientcoolingcapacity

(continued).

9. Too much cooling.

10.“Sweating”

11. Blowers won't operate on Heat.

12. **Equipment is noisy.

13.Insufcientornoheat

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 tube or strainer, indicated by:

1) Frost on capillary tube 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 push-button switch. d. Loose connections at push-button 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 push-button switch. d. Loose connection at push-button switch. e. Thermostat set too high. f. Thermostat faulty. g. No power output on transformer secondary. h. In-operative valve.

1) Steam valve normally closed.

2) Hot water valve normally closed.

d. Refertooriginalloadcalculations;recalculateheatload.

e. Close them. f. * Ship cooling chassis prepaid to nearest McQuay authorized warranty station.

g. * Ship cooling chassis prepaid to nearest McQuay authorized war

ranty station.

a. Adjust. b. Replace.

a. Removeobstructionstowaterow.

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

a. Correct as in #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 to reposition fan motor bracket assembly. b. Lubricate with SAE #19 oil or 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 apparent

reason. Inspect ion 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.

k. Tighten.

a. Contact building management. b. Check power supply line fuses, circuit breakers. Blow fuses would

indicate circuit overloading, a short circuit, or a grounded condition in

the circuit. c. Replace. d. Replace wire or tighten.

e. Adjust–rotateknobto“Warm”.

f. Replace. g. Replace. h.

 1)Temporarilylockvalveopen;replace.

2) Replace.

IM 1068 / Page 29 of 32

Approximate Shipping Weights

Cooling Chassis

Size 007 ........................................................................ 137 lbs.

Size 009 ........................................................................ 137 lbs.

Size 012 ........................................................................ 143 lbs.

Size 019 ........................................................................ 228 lbs.

Hydronic Heat Section With Control

Size 007 .......................................................................... 65 lbs.

Size 009 .......................................................................... 65 lbs.

Size 012 .......................................................................... 65 lbs.

Size 019 .......................................................................... 77 lbs.

Electric Heat Section With Control

Size 007 .......................................................................... 60 lbs.

Size 009 .......................................................................... 60 lbs.

Size 012 .......................................................................... 60 lbs.

Size 019 .......................................................................... 70 lbs.

Wall Box With Rear Extension of:

Sizes 007–012 2½'' ...................................................... 45 lbs.

3½" ...................................................... 46 lbs.

Size 019 2½'' ...................................................... 57 lbs.

3½" ...................................................... 59 lbs.

Room Cabinet

Sizes 007–012 7¼" ...................................................... 44 lbs.

8¼'' ...................................................... 48 lbs.

Size 019 8½'' ...................................................... 60 lbs.

Louver

007–012............................................................................ 6 lbs.

Size 019 ............................................................................ 9 lbs.

IM 1068 / Page 30 of 32

IM 1068 / Page 31 of 32

Warranty

All McQuay equipment is sold pursuant to its standard terms and conditions of sale, including Limited Product Warranty. Consult your local McQuay Representative for warranty details. Refer to Form 933-43285Y. To find your local McQuay Representative, go to www.mcquay.com.

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

Products Manufactured in an ISO Certified Facility.

McQuay Type K Incremental Packaged Terminal Air Conditioner, Incremental Packaged Terminal Maintenance Manual

Specifications and Main Features

Frequently Asked Questions

User Manual