McQuay PDAE, PDHE Maintenance Manual

Page 1

Installation & Maintenance Data IM 950-1

PDAE/PDHE 16" x 44" Replacement Unit Comfort Conditioner

Group: PTAC Part Number: 669548801

Date: February 2009

Note: Installation and maintenance are to be performed only by qualied personnel who are familiar with local codes and regula-

tions and are experienced with this type of equipment. Caution: Sharp edges and coil surfaces are potential injury hazards.

Page 2

Table of Contents

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

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

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

Dimensional Data .......................................................5

all Opening Requirements ..................................6

Installation Considerations ....................................7

Preparing the Unit for Installation ...........................8

Installation of: ...........................................................8

Louver Frame ........................................................8

Cabinet/W

Optional Condensate Drain Kit .............................9

Room Cabinet/Wall Sleeve .............................10-11

Heating/Cooling Chassis .....................................12

Heat Fan Lock Out Control .................................12

Equipment Start-up ..............................................13

Start-up Report–Audit .........................................14

ols ..............................................................15-26

Contr

Standard Digital

Modes of Operation ........................................17-21

Premium (Programmable) Digital

ouchpad Control Operating Instructions ......22-24

T Remote

all Sleeve Extension .............................8

Touchpad Control ................15-17

Wall Mounted Thermostats ...............25-27

Wiring Diagrams .................................................27-31

Remote Premium (Programmable)

Digital Control Board ..........................................

Standard (Non-programmable)

Digital Control Board ..........................................

Digital Control Board Digital Control Board

Scheduled Maintenance ........................................32-33

Faults and Protection Codes for

PTAC/PTHP Control Board .......................................34

Solid State Digital Controls-LUI Interface

Display Codes ............................................................34

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

Approximate Shipping Weights .................................37

Thermostat With Secondary Units .........27

With Standby Power ........30

Without Standby Power ...31

Now that you have made an investment in modern, efcient McQuay® equipment, its care and operation should be a high priority. For training information on all McQuay HVAC products, please visit us at www.mcquay.com and click on Training or phone 540-248-0711 and ask for the Training Department.

IM 950-1 / Page 2 of 38

Page 3

Safety Information

Follow all safety codes. Wear safety glasses and

work gloves. Use a quenching cloth for brazing operations. Have a re extinguisher available. Follow

all warnings and cautions in these instructions and attached to the unit. Consult applicable local building codes and National Electrical Codes (NEC) for special

requirements.

Recognize safety information. When you see a safety symbol on the unit or in these instructions, be alert to the potential for personal injury. Understand the meanings of the words DANGER, WARNING, and CAUTION. DANGER identies the most serious hazards that will result in death or severe personal injury; WARNING means the hazards can result in death or severe personal injury; CAUTION identies unsafe practices that can result in personal injury or product and property damage.

Improper installation, adjustment, service, maintenance, or use can cause explosion, re, electrical shock, or other conditions which may result in personal injury or property damage. This product must be installed only by personnel with the training, experience, skills, and applicable licensing that makes him/her “a qualied professional HVACR installer.”

WARNING

The installer must determine and follow all applicable codes and regulations. This equipment presents hazards of electricity, rotating parts, sharp edges, heat and weight. Failure to read and follow these instructions can result in property damage, severe personal injury or death. This equipment must be installed by experienced, trained personnel only.

DANGER

Hazardous Voltage! Disconnect all electric power including remote disconnects before servicing. Failure to disconnect power before servicing can cause severe personal injury or death.

CAUTION

Use copper conductors only. Unit terminals are not designed to accept other types of conductors. Failure to do so can damage equipment.

Inspection

When the equipment is received all items should be carefully checked against the bill of lading to be sure all crates and cartons have been received. All units should be carefully inspected for damage when received. If any damage is noticed, the carrier should make the proper notation on the delivery receipt acknowledging the damage. The carrier should also ll out a carrier Inspection Report. The McQuay Inc. Trafc Department should then be contacted. The unit nameplate should be checked to make sure the voltage agrees with the power supply available.

A complete unit consists of the following components, ordered and shipped separately.

Heating/Cooling Chassis

2. Front Panel.

2. Room Cabinet/Wall Sleeve.

3. Outdoor Louver.

4. Subbase – Optional for 208V and 230V units but mandatory for all 265V.

5. Fixed heater with factory installed power cord.

6. Electrical receptacle – Required for 208V and 230V units but mandatory for all 265V and Hydronic units.

7. Plug cord cover – Optional for 208V and 230V units but mandatory for all 265V.

IMPORTANT

This product was carefully packed and thoroughly inspected before leaving the factory. Responsibility for its safe delivery was assumed by the carrier upon acceptance of the shipment. Claims for loss or damage sustained in transit must therefore be made upon the carrier, as follows:

VISIBLE

Any external evidence of loss or damage must be noted on the freight bill or carrier’s receipt, and signed by the carrier’s agent. Failure to adequately describe such external evidence of loss or damage may result in the carrier’s refusal to honor a damage claim. The form

required to le such a claim will be supplied by the carrier.

CONCEALED

Concealed loss or damage means loss or damage which does not become apparent until the product has been unpacked. The contents may be damaged in transit due to rough handling even though the carton may not show external damages. When the damage is discovered upon unpacking, make a written request for inspection by the

carrier’s agent within fteen (15) days of the delivery

date. File a claim with the carrier since such damage is the carrier’s responsibility.

LOSS OR DAMAGE

IM 950-1 / Page 3 of 38

Page 4

McQuay Model PDAE/PDHE Product Nomenclature

Note: For Illustration purposes only. Not all options available with all models.

Please consult a McQuay Sales Representative for specic availability.

P DAE 1 009 E M R H A B D M A A E

Unit Type

P = PTAC

Product Identier

PDAE = A/C PMES/EA Replacement PDHE = H/P PMRS/RS Replacement

Design Series

1 = A Design 1 2 = B Design 2 3 = C Design 3 4 = D Design 4 5 = E Design 5

Unit Size

007 = 7,000 009 = 9,000 012 = 12,000 015 = 15,000

017 = 17,000 (Cooling Only)

Voltage

A = 115-60-1 E = 208/230-60-1 J = 265/277-60-1 P = 208/230-60-1 w/stndy 115-60-1

Warranty

A = Standard E = Extended X =Special

SKU

A = Stock

B = Build to Order

Upgrade Packages

S = Seacoast Y = None

Power Connection

L = Long Cord – 72" (Standard) S - Short Cord – 18" (Optional)

18" Cord, Standard w/Hydronic Subbase

Y = None

Brand Name

M = McQuay

Refrigerant

R = R22

Heating Type

E = Electric Heat

H = Hydronic (PDAE only) Y = None (PDHP only)

Electric Heat

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

Y = None

Hydronic Heat Type

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

Y = None

Room Interface

Cabinet Type

D = 16" x 44" Replacement

Controls

Control Board Type

B = Basic Control P = Premium Controls

(Req'd for Hydronic Heat)

User Interface Type

P = Programmable (Unit Mtd. Touchpad)

N = Non-Programmable

(Unit Mtd. Touchpad) Y = None (Wall Stat with Blank-off Plate)

Damper Type

Damper Control

A = Automatic (Required for Hydronic Heat)

M = Manual Y = None

IM 950-1 / Page 4 of 38

Page 5

Dimensional Data

PDAE – Air Conditioner with Electric Heat / PTHE – Heat Pump with Electric Heat

Finished

Wall Line

/2" (267mm)

Minimum

Top View

/8" (1140mm)

1/2" (13mm)

163/8"

(416mm)

Louver thickness: 3/8" (10mm) stamped,

A =

/8" (29mm) extruded architectural

20" (508mm)

111/16"

(43mm)

/2" (1054mm)

Front View

3" (76mm)

or 4" (102mm)

/4"

(159mm)

Side View

/4" (108mm)

4 to 133/4" (349mm)

IM 950-1 / Page 5 of 38

Page 6

Wall Opening Requirements

The rough opening should measure 165/8" high x

/8" wide. When using a louver frame, the opening

45 must measure 16 used for panel wall and thin wall applications to assure positive anchoring to the wall (Figure 13). When a elecrical subbase is used, the opening must start 3" to 4" above the nished oor (including carpeting) to match the height of the subbase selected. The subbase is available in 3" or 4" heights and has adjustable leveling legs that provide up to an additional 1" height.

A 3" or 4" subbase is required for 265V models and

is optional for 208/230V models.

/8" x 453/8". Louver frames should be

Figure 3. Frame and Brick Construction

/8" x 447/8"

Cabinet/Wall Sleeve

/8" High

/8" Wide

Cabinet/Wall Sleeve

Rough Opening

Lintel

(by others)

Wall Construction Types

Figure 1. Panel Wall (Thin) Construction

Steel Studs

Concrete

Pillars

165/8" x 451/8" Cabinet/Wall Sleeve

Rough Opening or

167/8" x 453/8" When using a Louver Frame

(See page 9 for Installation)

Figure 2. Masonry Wall (Thick) Construction

Room Side

Floor

Lintels (by others)

Installation – Considerations

The PDAE/PDHE 16" x 44" Replacement Unit is

designed and built for through-the-wall installation in either existing or new buildings. Each conditioner consists of the following components identied in their typical installation sequence:

Subbase – Optional on 208/230V, standard on 265V,

1. shipped in its own carton.

. Louver Frame – Optional, shipped ve (5) per

carton.

Room Cabinet/Wall Sleeve with Front Panel and

Filter – Shipped in palletized carton.

4. Outdoor Louver – Shipped in its own carton.

IMPORTANT

Air ow required for PTAC units must not be restricted

by exterior plants or walls. Plants or shrubs must not be planted in close proximity to the outside grille of the PTAC unit. Vegetation planted too close to grilles will cause discharge air to be recirculated, thereby increasing electrical consumption. Warranty will be voided if it is determined that the compressor life is shortened from overheating due to close proximity of outside obstructions.

Wall Sleeve Extension

(See page 9 for

Installation)

IM 950-1 / Page 6 of 38

Splitters

/8" x 447/8"

16 Cabinet/Wall Sleeve

Note: Discharge air restrictions include, but are not

limited to:

• Vegetation

• Concrete walls or barriers

• Overhangs that do not allow discharge air to rise

• Installation of bug screen of any kind

Heating/Cooling Chassis – Shipped in palletized

5. carton.

Page 7

General Information

Electric Service – All wiring should be done in accor-

dance with local and national electrical codes. Electric service for the replacement unit is via a receptacle type outlet furnished with 265V units. 208/230V units are equipped with a plug and cord set to plug into a receptacle which is supplied by others and eld installed.

The use of an extension cord to increase the length of the plug/cord set furnished as a part of the unit is not recommended.

3. Conditioner with Subbase – Required with 265V

units, optional with 208/230V units. The subbase includes an electrical compartment in the right front corner providing brackets for mounting a receptacle directly beneath the base pan knockout. There is no need for a junction box when this method is used (see Figure 6). Since 265V units require a subbase, the electrical cord is only long enough to reach a receptacle in the subbase.

In all cases, excess cord should be rolled up an stored

in the conditioner.

Suggested Outlet Locations

1. Floor Mounted Conditioners – 208/230V units

only. Mount an outlet in the wall to the right or left of the conditioner (see Figure 4). The chassis’ cord has a 72 inch usable length from where it exits from the lower right of the front panel.

Fig. 4. Floor-mounted Conditioner

Wall Mounted Conditioner – 208/230V units

only. A receptacle is generally mounted beneath the conditioner on, or recessed in, the wall so it is concealed by the conditioner overhang (see Figure

5). The chassis’ cord has a 18 inch usable length from where it exits from the lower right of the front panel.

Fig. 6. Conditioner with Subbase

Figure 7. Cabinet/Sleeve Base Pan - Top View

447⁄8"

(1140mm)

Knockout

20"

(508mm)

81⁄4"

(210mm)

(70mm)

⁄8" (105mm)

11⁄2"

(38mm)

⁄4"

Fig. 5. Wall-mounted Conditioner

Note: Remove knockout from base pan if subbase is

used.

IM 950-1 / Page 7 of 38

Page 8

Preparing Unit for Installation

Note: rst install the louver frame following steps 1

and 2 as described in "Louver Frame Installation."

Remove the outer carton and inspect the conditioner

for damage. Report any damage found to the carrier.

Note: Save the outer carton for reuse to cover the

installed conditioner until ready for use.

Louver Frame Installation

When a louver frame is used, it must be installed

prior to, or at the same time, as the room cabinet/wall sleeve, and it must be level and square (see Figure 8).

Cabinet/Wall Sleeve Extension for Thick Wall Construction Types

The standard wall sleeve will accommodate a maximum wall thickness of 10.25." For thicker walls, wall sleeve extensions are required and are available from your local representative. When it is supplied by the representative, it is treated for maximum corrosion resistance and matched to exact size of the standard wall/sleeve. Be sure to provide air splitters to prevent recirculation of condenser air. Air splitters should be placed in the wall sleeve as shown in gure 9. It is important that spacing of the air splitters match exactly those dimensions shown in gure 9.

Figure 9. Wall Sleeve Extension

Apply caulking compound on the surfaces of the

1. louver frame’s four anges which will come in contact with the wall. Add caulking as required for weather tight seal.

Insert the sleeve of the louver frame into the wall

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

Secure the louver frame to the wall through the

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

If the louver frame is to be installed in a panel wall,

it should be installed at the same time as the room cabinet/wall sleeve.

Figure 8.

Nut & washer 5 places

Cabinet Sleeve

Caulk sides

Subbase

Louver Frame

Louver

Drill holes & secure top & sides

Leveling

bolt

Secure to Subbase

Receptacle

⁄16"

1 Flange

Note: Subbase is optional on 208/230V units, but

required on 265V. Louver frame is optional on all units.

IM 950-1 / Page 8 of 38

24"

as required

16"

117/8"

44.50"

Air Splitters

24"

/8"

Wall Sleeve Extension

Room Side

Cabinet/Wall Sleeve Extension Installation

Wall sleeve extensions are shipped in a separate carton and tagged to match the proper unit. Be sure to check tagging of the extension against that of the unit. Install the wall sleeve extension as follows:

Position the extension with standard wall

1. sleeve so proper alignment with drain and mounting holes is achieved.

2. Place a bead of caulk around the perimeter of the wall sleeve and another bead around the mating side of the wall sleeve extension so that the joint is watertight. Do not permit caulking to block the weep holes. Be sure to use a resilient caulking such as silicone.

3. Assemble the wall sleeve extension to the wall sleeve. Clean out weep holes to assure proper

drainage.

4. Attach indoor drain kit (if used) according to the instructions on page 9. Outdoor drain kits must be installed to the wall sleeve extension.

5. Continue wall sleeve installation according to instructions on page 10-11.

Page 9

Condensate Drain Kit Installation

External Drain Kit

Indoor Drain Kit

3. Drill two (2) 5/32" pilot holes for the mounting screws. These holes can be located using the drain kit as a pattern.

4. Assemble the drain kit as shown in Figure 10 and securely fasten it to the wall sleeve with the

screws provided. Use either the 90

elbow or 6"

straight tting as required.

5. Install the cabinet/wall sleeve as described on pages 10-11.

Alternate 6" Long, 1/2" O.D.

Straight Copper Tube

Figure 10 illustrates the installation of the indoor drain kit. The indoor drain kit must be installed before placing the cabinet/wall sleeve into the opening. Assembly of the external drain kit should be completed after the cabinet/wall sleeve has been installed.

Indoor Drain Kit Installation

1. Locate the drain so that it will be on the room side of the wall when the wall sleeve is installed.

2. Drill a 1/2" diameter hole in the base of the wall sleeve for the drain.

Figure 10. Indoor Drain Kit

Room Side

Note: When using the external drain kit, the sleeve

must be ush or beyond the outside nished wall (do not recess).

External Drain Kit Installation

1. Assemble the drain kit as shown in Figure 11.

2. Choose the side of the cabinet/wall sleeve to which the drain kit is to be installed.

3. There are drain holes and pilot holes provided in the wall sleeve from factory. Place the drain kit against the chosen drain hole and fasten securely with screws provided. Use either the 90 6" straight tting as required.

4. Cover the unused drain hole with the block off plate and gasket supplied with the drain kit.

Indoor Drain Detail

Contractor To Drill Three (3) Holes To Accept Drain Kit

Gasket

elbow or

Neoprene Sponge Gasket

Steel Mounting Plate

Cover

Plate

Neoprene

Sponge

Gasket

Screws

Cabinet Bottom

Tube

1/2"

(13mm) O.D.

IM 950-1 / Page 9 of 38

Page 10

Figure 11. External Drain Kit - installed after the cabinet/wall sleeve has been installed.

Neoprene Sponge Gasket

Block off plate and gasket

Alternate 6" Long,

1/2" O.D. Straight Copper Tube

Steel Mounting Plate

Room Cabinet/Wall Sleeve

Room Side

Note: Use of 6" straight drain

tube will require modication of architectural louver.

1/2" (13mm) O.D. Drain Tube

Neoprene Sponge Gasket

Installation

Considerations

The cabinet/wall sleeve is a standard size 163/8"

high, 44 are factory welded into the sleeve to facilitate easy installation and removal of the chassis.

chassis and the louver to the wall sleeve.

Panel and Thin Wall Applications

The PDAE/PDHE conditioner can be successfully

installed in various ways. However, this instruction is based on the use of both a subbase and a louver frame.

Install the subbase as described in the section "In-

Install the louver frame as described in the section

Position the room cabinet/wall sleeve in the louver

Level the subbase with leveling bolts provided.

IM 950-1 / Page 10 of 38

/8" wide and 203/4" deep. Slide channels

All necessary fasteners are supplied to assemble the

stallation of Subbase. Also refer to IM 937 shipped

with the subbase.

“Louver Frame Installation.”

frame opening and on the subbase. The rear face of the cabinet should be recessed from the outside edge of the louver frame by the depth of the louver to be installed (see Figure 12).

Attach the subbase to the room cabinet/wall sleeve per instructions provided with the subbase.

After the room cabinet/wall sleeve is leveled side

5. to side and pitched 1/4 bubble to the outside, secure the louver frame to the wall with screws driven through the sides and top of the room cabinet/wall sleeve outward through the louver frame. Never secure the frame through the bottom as it may cause leaks.

Caulk the outdoor joint between the room cabi-

6. net/wall sleeve and the louver frame: top, bottom, and both sides. Do not permit caulking to block the weep holes.

Install the outdoor louver. Holding the louver with

7. a wire loop or other similar means, push the louver out through the rear opening in the room cabinet/ wall sleeve and pull the louver back to the rear face so that the louver studs pass through the holes in the room cabinet/wall sleeve ange. Attach the louver with the washers and nuts provided, and securely tighten the louver in place.

Cut the shipping carton as necessary to cover the

8. installed room cabinet/wall sleeve until ready to

use.

Page 11

Masonry and Thick Wall Applications

1. Preparation of the wall opening — In new construction, the room cabinet/wall sleeve can be built into the building wall as it progresses, or openings can be left for later installation.

lintel by others must be used to support any brick

or masonry work above the conditioner.

Set the room cabinet/wall sleeve in soft mortar and

2. position it in the wall opening. The rear face of the conditioner should be recessed from the outside edge of the wall opening by the depth of the louver to be installed. When using the anged stamped louver, the rear ange of the room cabinet/wall sleeve will be ush with outside edge of the wall opening. The center of gravity of the conditioner is

⁄2" from the rear face. For wall-mounted condi-

tioners, the center of gravity must be within the load bearing portion of the wall; otherwise, sup-

port is required.

Level the room cabinet/wall sleeve side to side and

3. pitch down 1/4 bubble to outside. Securely fasten the room cabinet/wall sleeve in the wall from inside the cabinet through the sides and/or top on the outdoor side of the weather seal. Make sure the cabinet is not distorted. Never secure through the bottom of the cabinet. For installations using a subbase, level the room cabinet/wall sleeve with leveling bolts provided with the subbase. Attach the subbase to the room cabinet/wall sleeve per instructions provided with the subbase.

After the room cabinet/wall sleeve is installed and

4. leveled side to side and pitched down 1/4 bubble to the outside, secure it and the louver frame to the wall with screws driven through the sides and top of the room cabinet/wall sleeve outward through the louver frame. Never secure the frame through the bottom, as it may cause leaks. A hole has been added to each side of the wall sleeve as a provision for securing the sleeve in the wall opening. Each hole is located 2" down from the top and 2" in from the rear of the sleeve. (See Figures 12 and 13.) These holes or other non-perforated locations in the sides and/or top of the sleeve may be used to fasten the sleeve to the wall from the inside. Never secure the room cabinet/wall sleeve to the wall

through the bottom.

Caulk the outdoor joint between the room cabinet/

5. wall sleeve and the wall opening (or louver frame): top, bottom and both sides. Do not permit caulking to block the weep holes.

⁄32" diameter

Figure 12.

Room cabinet/ wall sleeve

Finished Floor

Finished Wall

Subbase

⁄32" Dia.

(typical of 2)

(86mm)

Louver Depth

Louver Frame

Outside wall

Figure 14.

Finished Wall

Finished Floor

Optional

Subbase

Lintel by others

⁄32" Dia.

(typical of 2)

Louver Depth

Mortar Base

Outside wall

Note: Subbase is optional on 208/230V units, but

standard on 265V. Louver frame is optional on all units.

Install the outdoor louver. Holding the louver

6. with a wire loop, or other similar means, push the louver out through the rear opening in the room cabinet/wall sleeve and pull the louver back to the rear face so that the louver studs pass through the holes in the room cabinet/wall sleeve ange. Attach the louver with the washers and nuts, and securely tighten the louver in place.

Cut the shipping carton as necessary to cover the

7. installed room cabinet/wall sleeve until ready for

use.

⁄8"

IM 950-1 / Page 11 of 38

Page 12

Heating/Cooling Chassis

CAUTION

Installation

1. Check the chassis for damage. Spin the fan wheels

manually to conrm free rotation. Check the refrigerant tubing to determine that there are no kinks and that it does not rub against other parts. Report any shipping damage to the carrier immediately.

Check the interior of the installed room cabinet/

2. wall sleeve. Clean out any dirt or debris that may have accumulated.

If Replacement chassis is being installed in an

existing RS/MQT cabinet/wall sleeve, the retaining bracket, located in the center top and inside the cabinet/wall sleeve, must be removed to allow the chassis to be completely inserted into the cabinet/ wall sleeve. It is held in place with a 1/4" phillips head screw.

Note: If this PDAE/PDHE chassis is replacing an EA/

MEA chassis that had originally been adapted into an RS or MQT wall sleeve, you will need Replacement Gasket Kit #106231301.

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

compounds on carpets, oors or walls, turn the unit off

to avoid drawing potentially damaging vapors into the package terminal unit.

Front Panel Operation and Air Filter Access

1. Front Panel - Remove the two sheetmetal screws adjacent to the release buttons in the top of the black border, if so equipped.

Release the top of the panel from the room cabinet/

2. wall sleeve by depressing the two vertical buttons in the top of the black border and/or by removing screws (Figure 13).

Figure 13.

Latching Button Slot or sheetmetal screws

Room cabinet/ wall sleeve

, if so equipped,

Optional

Louver Frame

Slide the chassis into the room cabinet/wall sleeve

3. until rmly seated against the seal. Push the chassis on the capacitor box cover and/or sheetmetal anges. Do not push on the coil surface, control box cover, or fan scroll.

Note: If Hydronic is the heat source, the Heat Fan

Lock Out sensor must be installed. This control is found coiled up between the evaporator coil and the control box. The factory supplied Heat Fan Lock Out (HFLO) control is a eld mounted aquastat that clips on the hot water return piping or the steam condensate return line. After installing the sensor on the return line make sure the sensor connector is rmly seated on the pins on the control board. When the unit is in the Heat Mode, but when hot water or steam is not available, it prevents the indoor fan from operating. The indoor fan will only operate in the “Fan Only” and “Cool Modes”.

Plug the electrical cord into the receptacle. Excess

4. cord should be coiled neatly and stored in the con-

ditioner.

Replace the front panel as described in the section

“Front Panel Operation and Air Filter Access.”

Air Filter

Front Panel

Subbase

Note: Subbase is optional in 208/230V unit, but

required on 265V. Louver frame is optional on all units.

Tilt the panel out from the cabinet and allow the

3. top to rest against your legs. Both hands are now free to release the lter on the front side of the coil.

To remove the panel, lift it up to disengage the

4. hinging tabs from the cabinet.

To install the front panel, insert the hinging tabs

5. into the slots in the bottom of cabinet. Push the top of front panel closed exerting sufcient thumb pressure on the top of the black border area to allow the installation of the sheetmetal screws.

Replace the two sheetmetal screws adjacent to the

6. latching buttons in the front panel (if so equipped) or replace the two sheetmetal screws in the upper left and right corners.

IM 950-1 / Page 12 of 38

Page 13

Equipment Start-up

Initial start-up of any Incremental experienced technician 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 necessary adjustments. It also includes demonstrating its proper operation to

the owner or their agent.

Note: that unless otherwise specically agreed to in writing, McQuay includes no eld labor, start-up ser-

vice, or the like, in the price of the equipment. After the equipment leaves the McQuay factory, it may become damaged or maladjusted during transportation or on the job. Sometimes wires are disconnected accidentally

or fan motors move on their bases due to rough han-

dling, causing the fans to strike. The correction of such conditions is part of the start-up.

conditioner by an

Before starting equipment, make certain that:

1. The correct voltage has been supplied to the equipment.

2. The electrical plug from the control box has been inserted into the receptacle.

Note: The direction of the conditioned air may be ad-

justed by rotation of the discharge grilles to change the airow pattern in a room. The building superintendent or assistant manager should be requested to make any changes as a thin at-edged tool is required to remove the grille.

IM 950-1 / Page 13 of 38

Page 14

PTAC/PTHP Startup

Report – Audit

Job Name __________________________________________ City ________________ G.O. # ____________

Installer __________________________________________________________________ Total No. of Units_____ Date of Final Inspection and Start-up ________________________________________ Unit Type

Manufacturers’ Representative Name ___________________________________ □ APTAC 16 × 42 □ Type K □ APTAC 16 × 44 □ Type J □ Enersaver

Name of Maintenance Manager Instructed ___________________________________ Other__________________

Essential Items Check

A. Voltage Check _____________ Volts (measured)

B. Yes No Condition Yes No Condition

□ □ Filters Clean □ □ Operates in Heating

□ □ Evaporator Coils/Drain Pans Clean □ □ Operates in Cooling

□ □ Wall Boxes Sealed To Wall, No Leaks □ □ Operates in Fan Only (if so equipped) □ □ Wall Box Pitch Satisfactory □ □ Hi-Lo Fan Speed Operational (if so equipped) □ □ Air Discharge Free of Obstruction □ □ Fans Rotate Freely Without Striking Fan Housing □ □ Condenser Air Free of Obstruction □ □ Cycle/Continuous Fan (if so equipped) □ □ Other Conditions Found: ___________________________________________________________

_______________________________________________________________________________ _______________________________________________________________________________ Note: “No” answers above require notice to installer by memorandum (attached copy).

Please include any suggestions or comments: _______________________________________________________ ____________________________________________________________________________________________ ____________________________________________________________________________________________ ____________________________________________________________________________________________ ____________________________________________________________________________________________

Above System is in Proper Working Order FOR INTERNAL USE

Release: Date SM ______________ CTS _____________ Sales Representative Signature T________________

Customer Signature Service Manager Approval

Date

McQuay International

Technology Park Boulevard, Auburn, New York 13021-9030 USA (315) 253-2771 Form No. 13F-1206

4900

IM 950-1 / Page 14 of 38

Page 15

Controls (Non-programmable)

Standard Digital Touchpad Control

Figure 14. Standard Digital Touchpad Control

Application

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

The Digital Control is operated with a Touchpad.

Inputs and Outputs

• Indoor coil sensor, (ICS)

• Outdoor coil sensor, (OCS)

• Indoor air sensor, (IAS)

• Outdoor air sensor, (OAS)

• Remote T’stat, T’STAT (RCWYBG)

• Heat Fan Lock Out (HFLO)

• Power supply, (24VAC)

• Line voltage input, (L1, L2)

• Indoor fan standby voltage, (L1STB L2STB)

• Control selection, (LUI, T’STAT

• Model selection, (AC/E, HP, HP/E)

• Time delay bypass, (TEST)

• Indoor off fan cycle, (FAN, OFF CYCLE–10, 20, 30, 1 HR)

Outputs

• Compressor output, COM

• Indoor fan, BLOWER LO, HI

• Outdoor fan, OUTDOOR FAN

• Electric heater, ELE

• Reversing valve, REV VALVE

Figure 15. Standard Digital Control Indicators

LED

2-Digit Display

9- LED

Indicators

7- Push Buttons

Keys and Indicators Labels

ON/OFF, FAN SPEED, MODE

7 Push Buttons FAN MODE, SLEEP

Temp buttons: Temp UP and for Temp DOWN

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

LED 2 Digit Displays No Label

for

Display Function Legend

Tr = Room Temperature hI = High Room Temperature Lo = Low Room Temperature LA = Low Ambient Lockout rT = Remote Thermostat Control tP = Touchpad Control t = Time Ts = Temperature Setpoint Rf = Room Freeze Condition CF = Coil Freeze Protection F = Fahrenheit C = Celsius LC = Control Lockout Mode

Remote Thermostat Control

The Remote Thermostat can be any thermostat that can interface with an electronic thermostat via RCWYBG terminals. The Control Selection jumper must be in T’STAT position. During a call the remote thermostat will pass R back to the controller on a respective terminal. The push buttons on the touchpad become inactive in the remote thermostat mode. However, the control pad LED display will indicate

the mode of operation, and the room temperature.

Note:

In terms of outputs, there are two types of thermostats: relay contacts and solid state. If you open the thermostat and don’t see relays then it must be solid state.

Manufacturers of solid state output thermostats in-

clude loading resistors on their installation kits. They are of 560 Ohm and 3W value. These resistors are meant to load thermostat solid state outputs in order for the output voltage to be either 0 or 24VAC, i.e. no oating voltage. These resistors are connected from W, Y, G to common (C), respectively.

User Interface

The user will by default control the Electronic Controller via the touchpad. The user can select with a jumper for the unit to receive commands from a

You can wire any type of 24Vac thermostat straight into the remote thermostat connector of PTAC control

boards, 667997101 and 667997201 (Basic and Pre-

mium models) and the control boards will recognize the signals from them.

IM 950-1 / Page 15 of 38

Page 16

Controls

Standard Digital Touchpad Control

Operation

Memory Recall

The digital control shall start with the last settings used prior to power down. These settings are saved in a non-volatile memory. Factory set mode is OFF.

On/Off Triggering

Control can be turned On/Off via LUI, Remote T’stat, or Sleep feature. The control will show the temperature set point when the mode is Cool, Cool Dry, or Heat. The display will be blank in Fan mode.

1. On/Off triggering with LUI

Control shall turn On or Of button is pressed in LUI. Once turned on control shall start on the last mode used before it was turned Off.

2. On/Off triggering with the Remote T’stat

Control shall be turned On if it was Of Remote T’stat when it is set up to be controlled by a Remote T’stat. A call for heat or cool from the Remote T’stat will be used to turn the control on. Control remains on until manually turned Off.

3. On/Off triggering with the Sleep feature

Sleep feature works in combination with the setting. Sleep time setting shall be user adjustable from 1 to 15 hours via the Touchpad. The timer will count down and when it reaches “0” it will turn the control Off if control was previously On and vice versa, if it was Off it will turn On after time expires. As mentioned in of this spec the Sleep operation is overridden by room freeze protection.

Control Off

When the control is in the Off Mode, relay outputs will be disabled with the exception of the indoor

fan (blower). It will stay on to meet the Hot Keep

specication. Indicator LED’s are all off.

f when the On/Off

f from the

Timer

protections section

Indoor and Outdoor Fan Operation

The indoor fan can be set to operate on High or Low speed with the Fan Speed Button on the touchpad. It can also be set for Continuous or Cycle operation on the touchpad. When set for Continuous, the “CONT” LED will be on and the fan will run continuously. When set for Cycle, the “CYCLE” LED will be on and the fan will turn on at a call for heat or cooling.

Fan Cycle Operation

On a call for Heating or Cooling, the indoor fan and the heating source or the compressor will be activated. When the call is satised and the heating source or the compressor is deactivated, the indoor fan will repeatedly run for 2 minutes on and the number of minutes selected on the PC Board off, until the next cut-in cycle. The number of cycles with timing as described above is determined based on the OFF FAN CYCLE jumper setting.

Remote T’Stat Mode

The unit can be jumper congured to take commands from a Remote Thermostat. The Remote Thermostat will call for Heat and Cool through the electronic controller.

The Remote T’stat will control through the board

1. the work of the compressor, indoor and outdoor fans, the reversing valve, and the heater

2. System will run in Cool mode when Y signal is high. In cool mode compressor (therefore outdoor fan) shall turn on

3. Cold start feature (see Modes of Operation – Cold Start), Cool dry mode (see Cold Dry Mode) and Sleep feature (see Sleep Feature) are not available in Remote T’stat cool mode

Temperature Range

The maximum operating temperature range is selectable via the Touchpad and is 60°F to 85°F with the limits included. The Remote Thermostat selectable operating range is 60°F to 90°F with limits included. The range is set in the Set-up menu.

IM 950-1 / Page 16 of 38

Page 17

Controls

Standard Digital Touchpad Control System Select Operation Using Remote

Thermostat

System will run in Heat mode and engage certain outputs based on the system selection (jumper) as described below (see Standard Digital Control Board Wiring Diagram on page 31).

AC/ELE

• If AC/ELE is selected then a signal on W terminal will call for heating.

HP or HP/ELE

• If HP or HP/ELE is selected then signals on Y and B terminals will call for heating.

NOTES:

1. Hot start and Sleep features are not available in

2. Control’s operation is subject to its own protection

3. Indoor fan mode and the speed will default to

4. The indoor fan is turned on when G signal is high.

Control Lockout Feature

The control is placed in a lockout mode of operation when Mode button is held pressed for 10 seconds. Display will show “LC” to conrm Lockout Mode has been entered. Once in this Lockout Mode the control board will not take any commands at all. In Lockout, unit will continue to operate with the same settings just prior to Lockout Mode. This means the touchpad will no longer be able to pass commands to the control. User’s set point will normally be displayed. Any button pushed will bring “LC” on display for ve seconds.

To exit the Lockout Mode and return to normal (regular) mode of operation, press the Mode button for 10 seconds. Display will show “nL” for ve seconds to conrm normal mode has been resumed.

Remote T’stat heat mode.

features when controlled by a Remote T’stat

“cycle” and “high” when unit is controlled by Remote T’stat

When there is no signal on G terminal then the indoor fan will be turned off.

Modes of Operation

Cool Mode

In Cool Mode, the compressor will start if the temperature at the space temperature sensor is 1°F or higher than the set point. It will stop if the space temperature sensor is 2°F or lower than the set point, subject to timing requirements.

In the Cool Mode, the indoor fan will operate according to the user settings for Fan Mode – Continuous or Cycle and Speed.

Cold Start

Cold start is initiated when the control has not called for cooling for more than two (2) hours or during a power-on-reset. During cold start, the set

point is lowered by 4°F (Tset-4°F) if the differential calls for cooling. The unit will operate in cold start until the new set point is satised (+ or – 1°F) or until the unit has run in cold start for at least 20 minutes. After one or both conditions are met, the set point will be reset to the user setting and the unit will run in the regular cool mode.

The indoor fan will operate according to the user settings for mode – Continuous or Cycle and Speed.

Cold start is not available with the Sleep feature.

Sleep Function

Sleep time is adjustable by the user from 1 to 15 hours in one (1) hour increments in a closed loop. The sleep time is adjusted and set via the touchpad and by pressing the Sleep Button repeatedly. On the touchpad, the display will show the set time in numbers for ve (5) seconds. Before the sleep time expires, the setting can be adjusted above the number of hours passed by pressing the Sleep Button. Pressing the On/Off Button can terminate the Sleep Mode.

A changeover from Heat to Cool or another Mode will reset the Sleep Timer.

The Sleep Function will be deactivated by pressing the power-on-reset or any button (except sleep) on the touchpad or the Remote Control.

IM 950-1 / Page 17 of 38

Page 18

Compressor

Low Fan

Off

8 mins.

4 mins.

Compressor

Low Fan

12 mins.

Off

Compressor

Low Fan

Off

30 secs.

6 mins.

Compressor

Fan

Off

12 mins.

Cool Dry Mode

Select the Cool Dry Mode when the standard Cool Mode does not provide sufcient dehumidication. In Cool Dry Mode, the unit must run in Cool Mode for 12 minutes or until the temperature differential between the room temperature and the set point is less than 2°F. This will also occur after a Cold Start or a Mode change from Cool to Cool Dry. During this time the fan will operate in the Mode and Speed selected.

Until one or both of the above conditions are met, the control will determine which Dry Mode (Zone) is initiated based on the temperature differential between the room temperature (Tr) and the temperature set point (Ts):

Figure 18. Zone C

Note: Cool Dry is not available with Sleep Function.

Figure 16. if Tr - Ts > 4°F, operation will be in Zone A Figure 17. if 2°F < Tr - Ts < 4°F, operation will be in Zone B Figure 18. if 0°F < Ts - Ts < 2°F, operation will be in Zone C Figure 19. if Ts - Tr > 5°F, operation will be in Zone D The other temperature ranges are dead bands for zone stability.

Figure 16. Zone A

Figure 19. Zone D

Figure 17. Zone B

IM 950-1 / Page 18 of 38

Page 19

Modes of Operation-Description

Standard Digital Touchpad Control

Heat Mode

Unit will call for heating based on the type of the heat source it has: heat pump in reverse cycle, hydronic or electric.

1) Hot Start

Hot Start is possible when the control has not called for heat in more than (2) hours or during poweron-reset. During Hot Start, the user’s set point is raised 4°F (Ts + 4°F). The unit will only call for heat if room temperature dif The unit will continue in Hot Start Mode until the new set point is satised (with a 1°F differential) or unit has run for at least 20 minutes. After one or both conditions are met, the set point will be reset to the user’s setting and the unit will run in regular

heat mode. Hot start is not available with the Sleep

feature. The fan will operate per the Fan Mode and Speed setting.

2) Hot Keep

In Hydronic Heat: When the water valve closes, the

indoor fan will operate per the user mode (Constant or Cycle) and speed setting.

Heat Fan Lock Out Control: When the unit is in

the Heat Mode, but when hot water or steam is not available, it prevents the indoor fan from operating. The indoor fan will only operate in the “Fan Only” and “Cool Modes”.

In Electric Heat: When the heater cuts out the indoor

fan will continue to run for 15 seconds at set speed regardless of “On or Off” mode.

3) Sleep Function

Sleep time is user adjustable from 1 to 15 hours in one hour increments in a closed loop via the touch

pad by pressing the Sleep button repeatedly. The

Sleep Mode can be terminated by pr On/Off button.

The Sleep Function will lower the temperature setting with time. Changing the Mode or a changeover from Heat to Cool will reset the Sleep Timer.

The Sleep function will be deactivated by Poweron-reset or by pressing any button on the Touchpad except Sleep.

4) Fan Mode

In the Fan Mode, the fan will operate continuously at the user’s speed setting. The compressor and outdoor fan will not operate. In single motor units, the outdoor fan will run along with the indoor fan.

ferential calls for heat.

essing the

Set Up Mode

To enter the Set Up Mode, simultaneously press the Mode, Up and Down buttons for 5 seconds. To change settings, press the Up or Down button. To move from one screen to another, press the Mode button.

To exit Set Up, press the Mode, Up and Down buttons simultaneously for 5 seconds or control will automatically exit Set Up in 15 seconds.

Settings within the Set Up Mode are as follows:

1) Control Selection:

To view the Control Selection Screen, press and hold the Up and Down buttons for 5 seconds. The setting may be changed by pressing either the Up or Down button. The “tP” setting is the default setting and indicates the touchpad control.

2) Temperature Limit Settings

To advance from Control Selection to Temperature Limit Settings, press the Mode button once. To set the Cool Minimum set point, press and hold Fan Cycle button and adjust the setting with the Up or Down

buttons. The minimum setting is 60°F.

To set the Heat Maximum set point, press and hold Fan Speed button and adjust the setting with the Up or

Down buttons. Maximum setting is 85°F.

The Display will show the upper operating limits rst. The default settings are Cool min. = 60°F and Heat max. = 85°F.

3) Hydronic Valve Operation

To advance from Temperature Limit Settings to Hydronic Valve operation, press the Mode button once. To toggle the setting, press either the Up or Down button. Settings are “no” (normally open) and “nc” (normally closed). Default setting is “no.”

4) Indoor Air Sensor Reading

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

Figure 20. Indoor Air and Indoor Coil Sensor

Locations

Indoor

Coil Sensor (ICS)

Indoor

Air Sensor (IAS)

IM 950-1 / Page 19 of 38

Page 20

Modes of Operation

Outdoor Air Sensor Reading

To advance from Indoor Coil Sensor reading to Outdoor Air Sensor reading, press the Mode button once. The control readout will show the outdoor air

sensor temperature.

Figure 21. Outdoor Air Sensor Location

Outdoor Air Sensor

(OAS)

Thermistor Failure Code and Condition

The system treats a sensor open or short as extremely cold or hot and reacts accordingly. The exception is the room air sensor, in which case the system will turn off. When the fault is corrected by replacement or repair, the respective error code will clear from the display (Table 1).

Table 1. – Failure Code and Condition

Thermistor Sensor Condition Error Code

< - 58°F or Room > 140°F or E1

Open or Close

< - 22°F for > 2s or Indoor Coil > 176°F for > 2s or E2

Open or Close

< - 22°F for > 2s or

Outdoor Air > 176°F for > 2s or E4

Open or Close

Compressor Random Restart

When power is interrupted, a random compressor restart delay of 0 to 2 minutes is initiated. In the Cool Mode only, the compressor will start operating only after the random delay plus 2 minutes (minimum off time for thermostat, ie. 2 to 4 minutes). Random delay is used only during

system startup or reset.

Unit Protective Logic

Compressor Minimum Run Time

For thermostat-controlled running cycles, the compressor will have a minimum run time of 90 seconds. The compressor can be stopped at any time if the system is switched to any Mode, except the Cool Dry Mode.

Compressor Minimum Off Time (delay on break)

When compressor is under the thermostat control, it has a 3-minute delay before restarting when it has cycled off.

Indoor Coil Freeze Protection

In Anti-Freeze Mode, the compressor and outdoor fan will be stopped and the display will show “CF”. The compressor and outdoor fan can be started only if the following conditions are met:

after the 3 minute delay on break, AND

2. the indoor coil reaches 49°F or above and remains there for at least 1 minute, OR

3. another Mode is selected.

The system is in Anti-Freeze Mode when the following conditions are met:

The control is in either Cool or Cool/Dry Mode.

2. The indoor coil reaches 32°F and stays there for at least ve (5) minutes.

3. The compressor has run for at least 90 seconds. Sleep Timer is overridden during this operation. Anti-freeze Protection is active in all modes of operation and when the control is Off.

Room Freeze Protection

When room temperature falls below 41°F, the hydronic valve is opened and the indoor fan operates on High Speed. The compressor and outdoor fan are off and the display will show “Rf”. The hydronic valve will close when the room temperature rises back to 50°F. During room freeze conditions, the temperature setting can be adjusted with the touchpad. Fan modes and Sleep Operation are overridden during Room Freeze Protection. Room Freeze Protection is active in all modes of operation and when control is off.

Temperature Limiting

When the room temperature drops 5°F below set point, the display will indicate “Lo.” When the room temperature rises 5°F above set point, the display will indicate “hI.” Alarm indications of 5°F above or below set point will be consistent with the set up mode settings for minimum and maximum temperatures.

IM 950-1 / Page 20 of 38

Page 21

Modes of Operation

Standard Digital Touchpad Control Temperature Limit Settings

1 To adjust the lower operating temperature limit

(cool minimum set point) press and hold Fan Mode button and adjust the setting with Up or Down buttons. The minute setting is 60ºF (15ºC).

To adjust the upper operating temperature limit

(heat maximum set point) press and hold down Fan Speed button and adjust the setting with Up and Down buttons. The maximum setting is 85ºF (30ºC). When control selection is set for “T'STAT,” the maximum setting can go up to 90ºF (32ºC).

The upper operating temperature limit will be

3. displayed first.

Default settings are: Cool minimum 60ºF (15ºC)

4. and Heat maximum 85ºF (30ºC).

Electrical Service

All wiring should be done in accordance with all local and National Electrical Code requirements. The conditioners are supplied as follows:

Electrical Heating Unit

1. 208V and 230V models are supplied with a power

cord which will exit from beneath the conditioner on the control side. 72" (457.2mm) from where it exits the conditioner. The use of an extension cord is not recommended. T

ime delay fuses are recommended to avoid nuisance tripping. The receptacle is generally mounted beneath the conditioner on or recessed in the wall so that it is concealed by the conditioner over hang. The space under the conditioner must be at least 3" (76mm) high.

2. An electrical subbase is available for 208V and 230V units and contains a junction box for a eld mounted receptacle All electrical connections are made within the subbase, thus eliminating the need for a wall mounted receptacle. The subbase is available in 3" (76mm) or 4" (102mm) height and can be furnished with factory mounted fused disconnect option.

The cord has a usable length of

3. On all 265V models, an electrical subbase is required. The chassis is supplied with a “short cord” which is just long enough to plug into the subbase. A plug cord cover is also furnished with the subbase to make the interconnecting cord inaccessible as required by the National Electrical Code. The conditioner is marked with the minimum circuit ampacity and maximum fuse size.

Equipment Start-up

Initial start-up of the Incremental® conditioners by experienced personnel is usually the responsibility of the installing contractor. This start-up consist of inspecting and operating the equipment for all functions at the time of initial installation and making necessary adjustments. It also includes demonstrating

its proper operation to the owner or his agent. Note

that unless otherwise specically agreed to in writing, McQuay International includes no eld labor, startup service or the like in the price of its equipment. After the equipment leaves the factory, it may become damaged or maladjusted during transportation or on the job. Sometimes wires are disconnected accidentally

or fan motors move on their bases due to rough

handling, causing fans to strike. The correction of such conditions is part of start-up.

Before Starting Equipment, Make Certain That:

Correct voltage has been supplied to the

equipment.

2. The electrical plug from the control box has been inserted into the receptacle.

During Start-up (applies only to standard equipment):

Note: Direction of conditioner air may be adjusted by

repositioning the discharge grille to change airow pattern in a room. The building superintendent or assistant manager should be requested to make any changes.

IM 950-1 / Page 21 of 38

Page 22

Controls

Premium (Programmable) Digital Touchpad Control Operating Instructions

LED with Program Setting

Display

9-LED

Indicators

Application

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

The Digital Control is operated with a Touchpad.

Inputs and Outputs

• Indoor coil sensor, (ICS)

• Outdoor coil sensor, (OCS)

• Indoor air sensor, (IAS)

• Outdoor air sensor, (OAS)

• Remote T’stat, T’STAT (RCWYBG)

• Heat Fan Lock Out (HFLO)

• Power supply: (24VAC)

• Line voltage input, (L1, L2)

• Indoor fan standby voltage, (L1STB L2STB)

• Control selection: (LUI, T’STAT

• Model selection: (AC/E, HP, HP/E)

• Time delay bypass, (TEST)

• Indoor off fan cycle: (FAN, OFF CYCLE–10, 20, 30, 1 HR)

8- Push Button Display

Inputs

Keys and Indicators Labels

ON/OFF, FAN SPEED, MODE,

8 Push Buttons

Temp buttons: Temp UP and for Temp DOWN

9 LED Indicators

HEAT, HIGH, LOW, CYCLE, CONT.

LED 2 Digit Displays No Label

SLEEP

AN MODE, SLEEP, PROG-ON/OFF

for

, COOL, COOL/DRY, FAN,

Display Function Legend

Remote Thermostat Control

mode of operation, and the room temperature.

Outputs

• Compressor output, COM

• Indoor fan, BLOWER LO, HI

• Outdoor fan, OUTDOOR FAN

• Electric heater, ELE

• Reversing valve, REV VALVE

User Interface

The user will by default control the Electronic Controller via the touchpad. The user can select with a jumper for the unit to receive commands from a Remote Thermostat.

IM 950-1 / Page 22 of 38

Note:

In terms of outputs, there are two types of thermostats: relay contacts and solid state. If you open the thermostat and don’t see relays then it must be solid state. Manufacturers of solid state output thermostats include loading resistors on their installation kits. They are of 560 Ohm and 3W value. These resistors are meant to load thermostat solid state outputs in order for the output voltage to be either 0 or 24VAC, i.e. no oating voltage. These resistors are connected from W, Y, G to common (C), respectively.

You can wire any type of 24Vac thermostat straight into the remote thermostat connector of PTAC control

boards, 667997101 and 667997201 (Basic and Pre-

mium models) and the control boards will recognize the signals from them.

Page 23

Controls

AM 9:45

TODAY

AM 9:45

Premium Digital Touchpad Control

Clock Set Menu

1.1 To set the time and day of the week, press FAN MODE and FAN SPEED buttons

simultaneously for 5 seconds. Time will be displayed rst:

1.2 Adjust the time by pressing

By holding pressed

or buttons, time will

and buttons.

change in 15 minutes increments or decrements respectively. AM and PM will show in rotation.

1.3 By pressing FAN MODE button, move to

the conrmation day of the week. Numbers represent

days of the week, Monday being 1 and

so forth. TODAY will ash on display. Adjust

the number that represents the day of the week

by pressing

and buttons:

1.4 Exit the clock set menu by pressing FAN MODE (TIME) and FAN SPEED (DAY)

simultaneously for 5 seconds

Conguration

The conguration mode is meant for temperature scale setting, limits for minimum and maximum operating temperatures and displaying sensor readings. To enter the conguration mode hold pressed

buttons for 5 seconds. Moving from one screen

to another and rolling over is done by pressing Mode

button.

and

To adjust the lower operating temperature limit

2.2

(cool minimum set point) press

and

buttons. COOL and the setting will be displayed as shown below. The minimum and factory default setting is 60°F (15°C). An example of what can be displayed:

To view the upper operating temperature limit

2.3

(heat maximum set point) press MODE button. HEAT will be displayed. An example of what can be displayed:

To adjust the upper operating temperature limit

2.4

(heat maximum set point) press

and

buttons. The max and factory default setting is 85°F (30°C). When Control selection jumper on control board is set for “T’STAT,” the max setting can go up to 90°F (32°C).

By pressing MODE button repeatedly from the

2.5

previous screen, the following will be displayed in sequence:

•

Indoor air sensor reading

• Indoor coil sensor reading

• Outdoor air sensor reading

• Outdoor coil sensor reading

2.6

Exit the conguration mode by pressing and

buttons for 5 seconds

Once in the conguration mode, the default

2.1

temperature scale will be displayed as shown below. Toggle the temperature scale to degree Celsius by pressing either

or button:

IM 950-1 / Page 23 of 38

Page 24

COOL DAY 1

8:00

MORN

Controls

DAY 1 MORN

DAY 1

8:00

MORN

DAY 1 HEAT

8:00

Premium Digital Touchpad Control

3.1 The touchpad of the electronic controller can be programmed for four time periods, MORN, DAY, EVE, and NITE that are customizable for

each day of the week. Each period will have a start time, heat and cool temperatures. The unit will monitor the day and time, while maintaining the specic conditions for each period of the day. During programming, the item that is ashing is adjustable.

3.2 T

3.3 By pressing SLEEP (

o enter the program menu, press SLEEP ( )

and MODE (

) buttons for 5 seconds.

) display will show

the day screen as shown below. Press

button to change the day to program. To advance

to the next screen, press SLEEP (

) button. To

return to the previous screen, press MODE (

button.

3.4 By pressing

or button, the period of the

day will change.

3.5 T

o advance to the next screen, press SLEEP

) button. Starting time will ash.

(

Adjust the starting time by pressing

buttons.

3.7 T

o advance to the next screen, press SLEEP

) button. Cool temperature will be

(

displayed. Adjust the cool setting with

and buttons.

3.8 T

Further

3.9 Simpleset programming is a convenient method

)

3.10 T

3.11 After exiting the program mode, select the mode

of operation and activate the program mode by

pressing the PROG ON/OFF button.

o program the thermostat for each period of the

day, repeat steps 3.3 through 3.7.

, the thermostat can be programmed for

each individual day of the week or use the

Simpleset

feature as described below.

of programming the thermostat. Once the entire

Monday (Day 1) schedule is set, Simpleset

programming will copy the Monday schedule to every day of the week. After completing Monday schedule, “day 2” will appear on the screen. Press Down button once to get to “day 1.” By pressing Down button for 3 seconds, days of the week will count down from 7 to 1 and settings are memorized. Once the schedule is locked in, go through each day of the week and make changes as needed.

This feature

speeds up the programming of the standard

weekday/weekend schedule.

o exit the program mode, press MODE ( )

and SLEEP (

) buttons simultaneously for 5

seconds.

3.6 To advance to the next screen, press SLEEP

) button. Heat temperature will be

(

displayed. Adjust the heat setting with

buttons.

IM 950-1 / Page 24 of 38

and

NOTICE

After a power outage, programmed daily settings will be retained in memory. However, the clock must be reset to the current time for the programmed daily settings to resume the correct schedule of operation. See Clock Set Menu instructions to reset the time and day of week.

Page 25

Remote Wall Mounted Thermostats

Wall mounted thermostats are available for the PDAE/PDHE unit in automatic or manual changeover styles. All include a fan switch for constant “on” operation or “automatic” for cycle operation with the compressor. When requested, all necessary relays and transformers are factory mounted and ready for attachment to eld 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-offcool” switch and fan “on-off” switch.

Figure 22. Non-Programmable Thermostat (107095701)

7-Day Programmable Manual Changeover Thermostat (107095801)

Simple, logical programming for set-up and setback temperatures and times. Compatible with singlestage heat pump systems. Enables separate morning,

day, evening, and night settings for every day of the

week. Simpleset™ feature enables easy copying of one day’s programming for the entire week. Select a warmer or cooler setting any time to temporarily override any program setting. Vacation hold overrides programming. Clear backlit display makes it easy to see time, temperature and setpoint – even in the dark.

No batteries required.

Figure 23. 7-Day Programmable, Manual Changeover

Thermostat (107095801)

Specications

Electrical Rating:

• 24 VAC (18 to 30 VAC)

• 1 amp maximum per terminal

• 3 amp maximum total load

• 60-minute power backup (SC2001)

Temperature Control Ranges:

• 45oF to 90oF, Accuracy: ±1

System Congurations:

• 1 stage heat, 1 stage cool or single stage electric

heat pump.

Terminations:

• R, C, W, Y, O, B, G

Specications

Electrical Rating:

• 24 VAC (18 to 30 VAC)

• 1 amp maximum per terminal

• 3 amp maximum total load

• 60-minute power backup (SC3001)

• Easy access terminal block

Temperature Control Ranges:

• 45oF to 90oF, Accuracy: ±1

System Congurations:

• Single stage heat, single stage cool or single stage electric heat pump

Terminations:

• RC, RH, C, W, Y, O, B, G

IM 950-1 / Page 25 of 38

Page 26

Remote Wall Mounted Thermostats

Figure 24. 7-Day Programmable Thermostat

(107095901), and optional remote sensor (107096001)

Specications

Electrical Rating:

• 24 VAC (18 to 30 VAC)

• 1 amp maximum per terminal

• 4 amp maximum total load

• 60-minute power backup for clock

Temperature Control Ranges:

• 45oF to 90oF, Accuracy: ±1

Thermostat Dimensions – 107095701, 107095801, 107095901

System Congurations:

• Single stage heat, single stage cool or single stage electric heat pump

Terminations:

• RC, RH, C, W, Y, O, B, G

NOTICE

When using existing thermostats by others; There are two basic types of thermostats manufactured

today; those with relay contacts, and those with solid-state

triacs. If you open the thermostat and don't see relays

then you can assume it to be solid state. Manufacturers of solid state output thermostats include

loading resistors on their installation kits. These are of

low Ohm value, approximately 560 Ohm and 3W. The

resistors are meant to load the thermostat outputs in order for the output voltage to be either 0 or 24VAC, i.e. no

oating voltage. These resistors are connected from W, Y, G to common (C), respectively. Therefore, if you are using

existing solid-state thermostats, you may have to add loading resistors for your PTAC controls to work properly.

McQuay thermostats do not require this modication.

IM 950-1 / Page 26 of 38

Page 27

Remote Wall Mounted Thermostats

Remote Thermostat Control

mode of operation, and the room temperature.

2. If subbase is used, a small hole must be drilled and grommeted in the subbase front to allow passage of the low voltage wires.

If secondary units are to be employed, see

3. connections in Figure 25.

Note: To allow Primary (Master) / Secondary (Slave)

operation, the primary board thermostat jumper must be in the “T’stat” position and the secondary boards must be in the “Sec” position.

Remote Mounted Thermostat Installation

Units that are furnished with remote mounted thermostats should be wired as shown in Figure 25. Other considerations for this arrangement are as follows:

1. When wiring the low voltage plug and receptacle

disconnect, provide enough wire to move harness out of the way for chassis removal.

Figure 25. Remote Thermostat With Secondary Units Wiring Connections

The number of secondary units that can be

connected is limited to 32 units.

When using a programmable wall thermostat,

4. connect it to the terminal board remote thermostat plug. Refer to the instructions furnished with the chosen thermostat.

IM 950-1 / Page 27 of 38

Page 28

Premium (Programmable) Digital Contol Wiring Diagram

1– Jumper Placement to Select System Module (See Jumper Detail)

A– Place jumper across AC/HYD to select Air

Conditioner/Hydronic Heat.

Place jumper across AC/E to select Air

B–

Conditioner/Electric Heat.

Place jumper across AC/HYD/E to select Air

C–

Conditioner/Hydronic/Electric.

Place jumper across HP to select Heat Pump.

D–

Place jumper across HP/E to select

E–

Heat Pump/Electric.

2– Jumper Placement to Select Fan Control:

A– When in Fan Cycle Mode, fan operates for

2 minutes – Place jumper across 10, 20, 30, or 1 HR to select fan cycle off minutes which will be overridden by the room

temperature.

3– Jumper Placement to Select Controller Type:

A– Place jumper across LUI to select unit mounted

touchpad (Local User Interface).

Place jumper across secondary (SEC) to select

B–

secondary control by a primary unit.

Place jumper across T’STAT to select remote,

C–

wall mounted programmable, or non- programmable thermostat.

4– Jumper Placement to Select Hydronic Valve:

A– Place jumper across NO to select Normally Open

Hydronic Valve.

Place jumper across NC to select Normally

B–

Closed Hydronic Valve.

Jumper Placement Detail

A B

C D E

Wiring Diagram Legend

CT = Control Transformer DM = Damper Motor CM = Compressor Motor IFM = Indoor Fan Motor OFM = Outdoor Fan Motor HFLO = Heat Fan Lockout Sensor OCS = Outdoor Coil Sensor OAS = Outdoor Air Sensor ICS = Indoor Coil Sensor IAS = Indoor Air Sensor LUI = Local User Interface HYV = Hydronic Valve REV = Reversing Valve

EHC = Eletric Heat Contactor

IM 950-1 / Page 28 of 38

Page 29

Standard (Non-programmable) Digital Contol Wiring Diagram

1– Jumper Placement to Select System Module (See Jumper Detail)

A– Place jumper across AC/E to select Air Conditioner

with Electric Heat.

Place jumper across HP to select Heat Pump.

B–

Place jumper across HP/E to select Heat Pump

C–

with Electric Back-up Heat.

2– Jumper Placement to Select Fan Control

A– When in Fan Cycle Mode, fan operates for 2

minutes – Place jumper across 10, 20, 30, or 1 HR to select fan cycle off minutes which will be overridden by the room temperature.

3– Jumper Placement to Select Controller Type:

A– Place jumper across LUI to select unit mounted

touchpad (Local User Interface).

Place jumper across T’STAT to select

B–

remote, wall mounted programmable, or non- programmable thermostat.

Jumper Placement Detail

A B C

Wiring Diagram Legend

CT = Control Transformer CM = Compressor Motor IFM = Indoor Fan Motor OFM = Outdoor Fan Motor OCS = Outdoor Coil Sensor OAS = Outdoor Air Sensor ICS = Indoor Coil Sensor IAS = Indoor Air Sensor LUI = Local User Interface REV = Reversing Valve

EHC = Eletric Heat Contactor

IM 950-1 / Page 29 of 38

Page 30

Wiring Diagrams

Digital Control Board With Standby Power

The standby power connections, L1 STBY and L2 STBY are meant to run the indoor motor at a separate voltage from the other motors, compressor and outdoor motor. When used as such, the jumpers, JH1 and JH2, must be cut. This renders L1 & L2 and L1 STBY and L2 STBY isolated from each other.

If there is no need to run the motors at a separate voltage the L1 = L1 STBY and L2 = L2 STBY. Therefore one voltage is used to run all motors.

If the jumpers are accidentally cut, then the connections can be spliced to substitute for the missing jumpers.

Table A

Wire Color Voltage

WH 120V RD 208V

OR 240V

BN 277V

Drawing No. 668001506

Legend

DM = Damper Motor HYV = Hydronic Valve CM = Compressor Motor IFM = Indoor Fan Motor OFM = Outdoor Fan Motor HFLO = Heat Fan Lockout Sensor OCS = Outdoor Coil Sensor OAS = Outdoor Air Sensor ICS = Indoor Coil Sensor IAS = Indoor Air Sensor LUI = Local User Interface REV = Reversing Valve IR = IR Receiver Board (AP7810) C1 = Indoor Motor Capacitor C2 = Outdoor Motor Capacitor C3 = Compressor Capacitor MP = Motor Protector

Note: The gray tinted areas in the wiring diagram; are options available only with the premium control board. For the latest drawing version refer to the wiring diagram located on the inside of the controls access panel of the unit.

IM 950-1 / Page 30 of 38

Page 31

Digital Control Board Without Standby Power

If there is no need to run the motors at a separate voltage the L1 = L1 STBY and L2 = L2 STBY. Therefore one voltage is used to run all motors.

If the jumpers are accidentally cut, then the connections can be spliced to substitute for the missing jumpers.

Table A

Wire Color Voltage

WH 120V RD 208V

OR 240V

BN 277V

Drawing No. 668001406

Legend

MP = Motor Protector

IM 950-1 / Page 31 of 38

Page 32

Maintenance (Scheduled)

Incremental conditioners are built to last. With proper care, the unit should provide uninterrupted service for many years. Scheduled maintenance of this equipment as described below, is the key to the equipment’s longevity.

Air lters must be cleaned at regular intervals.

A. Twice annually may be adequate in some areas while twice monthly may be required in others. Areas with high dirt and lint content or heavy usage of units require more frequent lter maintenance than those areas of relatively clean operating or low usage conditions. Unit malfunction will occur if air lters are not kept clean. Rinse lter with hot water and a mild

detergent.

B. McQuay recommends that every year the chassis be removed for a thorough checkup. This should be completed as follows:

1. Unplug unit from power source.

2. Remove front panel.

3. Remove chassis from cabinet and move it to the maintenance department. Replace with spare chassis or weather plate.

4. Check all seals and insulation and repair as

required.

5. Check all wiring and controls for hazardous conditions.

6. Thoroughly clean discharge grilles.

7. Cover motors and control module with water tight material and wash evaporator coil, condenser coil and base pan using hot water and a mild soap.

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

rust inhibiting paint.

11. Clean insulation or replace if necessary.

12. Check insulation on refrigeration piping and replace if necessary.

13. Check all fasteners and tighten as required.

14. Clean and oil damper door and linkage.

15. Test run chassis before reinstalling.

Equipment Protection From The Environment

The metal parts of this unit may be subject to rust or deterioration in adverse environmental conditions. This oxidation could shorten the equipment’s useful life. Salt spray, fog or mist in seacoast areas, sulphur or chlorine from lawn watering systems, and various chemical contaminants from industries such as paper mills and petroleum reneries are especially corrosive.

If the unit is to be installed in an area where contaminants are likely to be a problem, special attention should be given to the equipment location and exposure.

Avoid having lawn sprinkler heads spray directly

in or on the outdoor louver.

In coastal areas, the units must have the corrosion

protection package to maintain the warranty coverage.

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

CAUTION

compounds on carpets, oors or walls, turn the unit off

to avoid drawing potentially damaging vapors into the package terminal unit.

8. Check condensate removal system and assure proper operation. Pour at least two (2) cups of

water into evaporator drain pan and verify proper

operation. Clean condensate drain and clear weep holes located at the bottom rear of wall sleeve.

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

IM 950-1 / Page 32 of 38

Frequent washing of the outdoor section,

1 condenser fan blade and condenser coil with fresh water will remove most of the salt or other contaminants that build up in the outdoor section

of the unit

2 Regular cleaning of the cabinet with a good non abrasive polish will provide protection and keep it in good condition. 3 A mild liquid cleaner may be used several times a

year to remove matter that will not wash off with

water.

The best protection is frequent cleaning, maintenance and minimal exposure to contaminant.

Page 33

Maintenance

Recommended Spare Parts

An inherent advantage of the Incremental system is that failure of any part affects only one incremental conditioner and does not interrupt the operation of the rest of the system. A further advantage is that a failed part can be quickly and easily replaced, thus minimizing the inoperative time of the equipment. This is so, however, only if a replacement part is quickly available. In order to replace a failed part quickly and keep all incremental conditioners in good operating condition, McQuay International recommends that at the time incremental conditioners are purchased, owners arrange for a small stock of replacement parts.

Where an owner carries such a stock, immediate replacement of defective parts is possible. The defective part can then be returned to McQuay warranty parts. As long as it is still in warranty, it is repaired or replaced and returned to the owner with out cost for shop labor and material. Thus, the stock of replacement parts is constantly replenished. Below is a list of the kinds of parts which McQuay International recommends to be carried in stock together with the quantity of parts recommended per 100 incremental conditioners installed.

Cooling Chassis ..........................................................2

Compressor Overload Device .....................................2

Compressor Running Capacitor ..................................2

Fan Motor. Capacitor ..................................................2

Control Board ..............................................................2

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

Control Relay (if used) ................................................2

Damper Motor (if auto damper) ..................................2

Electric Resistance Heater (if electric heat) ...............2

Touch-up Paint (1 pt. spray can) ................................. 2

Refrigeration Cycle

Every motor-driven refrigeration system operates on the carnot cycle. A practical understanding of what goes on at the various steps in this cycle can be a big help to the troubleshooting mechanic. Figure 41 illustrates the refrigeration cycle. The diagram shows what occurs in each component of a hermetically sealed system as used in all McQuay Air Conditioning equipment. The temperatures shown are typical

of what they might be when the air entering the

condenser (outdoor temperature) is 95°F, (350 C) and the temperature of the conditioned space is

80°F (270 C).

Figure 41. Refrigeration Cycle

45°F. (7°C.)

R22 (Liquid and Gas)

to Evaporator

80°F. (27°C.)

Room Air to Evaporator

Evaporator

60°F. (15.5°C.)

Conditioned Air to Room

Capillary

Restrictor

110°F. (43°C.)

Liquid R22 to

Capillary

120°F. (49°C.) Condenser Air

to Outdoors

Condenser

95°F. (35°C.)

Outdoor Air to Condenser

60.3 psia (416 kPa) & 60°F. (15.5C.)

to Compressor (Gas)

Hermetic

Compressor

285.3 psia (1967.7 kPa) R22 to Condenser (Hot5 Gas)

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

55440.

IM 950-1 / Page 33 of 38

Page 34

Fault and Protection Codes for Applied PTAC/PTHP Control Board

Fault code Description Cause for the fault

CE Communication Error 1. Cable not plugged in properly on either LUI or relay board.

2. Defective cable. Sh Missing Shunt The user congurable shunt for System Select, Control Select Off Fan Cycle, and/or Hydronic Valve is

missing or not placed properly.

E1 Problem with IAS Indoor Air Sensor missing or short. E2 Problem with ICS Indoor Coil Sensor missing or short. E3 Problem with OCS Outdoor Coil Sensor missing or short. E4 Problem with OAS Outdoor Air Sensor missing or short. E5 Problem with HFLO Sensor HFLO Sensor missing or short on AP7809. Check for installation / connection of HFLO sensor. Should

be on coil return line.

Protection code

CF Coil Freeze Protection Indoor coil temperature has been below 32ºF for 5 minutes. Protection feature and the displayed code are dismissed when indoor coil temperature rises above 49ºF.

Rf Room Freeze Protection Indoor air temperature has dropped below 41ºF. Protection feature and the displayed code are dismissed when indoor room temperature rises at and above 50ºF.

hI High Room Temperature Indoor air temperature is 5 degrees above maximum setpoint limit. Protection feature and the displayed code are dismissed when indoor coil temperature rises above 50ºF.

Lo Low Room Temperature Indoor air temperature is 5 degrees below minimum setpoint limit.

LA Low Ambient Lockout Outdoor air temperature is below 35ºF.

Description Cause for the fault

Solid State Digital Controls – Local User Interface Display Codes

Fault code Description Cause for the fault

LC Control Lockout – Displays for 5 seconds when any button is pushed when in the "lockout mode". nL Control Lockout – Displays for 5 seconds to conrm normal mode of operation when control lockout turned off.

Normal Control

CL Damper Closed Control setup indicator damper is in "closed" mode. AU Auto Damper Control setup indicator damper is in "automatic" mode. AU Auto HP/E Control setup indicator heat pump electric is in automatic changeover mode (HP/E). bY HP/E Bypass Control setup indicator, electric heat is bypassed when OCS > 40˚. CF Coil Freeze Protection Indoor coil is ≤ 32˚ for at least 5 minutes. Compressor and outdoor fan stop and indoor fan continues

to run for active defrost. rF Room Freeze Protection Room temperature < 41˚. Damper closes (Premium board) and unit goes into heat mode. Lo Coil freeze protection Room temperature is 5˚ below set point.

Hi Temperature Limiting Room temperature is 5˚ above set point. LA Low Ambient Lockout Unit is in cooling mode and outdoor air < 35˚. Compressor will cut out. E1 Indoor Air Sensor Indoor Air Thermister Failure. E2 Indoor Coil Sensor Indoor Coil Thermister Failure. E3 Outdoor Coil Sensor Outdoor Coil Thermister Failure. E4 Outdoor Air Sensor Outdoor Air Thermister Failure.

E5 Problem with HFLO Sensor HFLO Sensor missing or short on AP7809. Check for installation / connection of HFLO sensor. Should be on coil return line.

IM 950-1 / Page 34 of 38

Page 35

Troubleshooting

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

1. Blowers won’t operate on cool

2. Blowers operate on cool but compressor does not start

3. Blowers run on cool and compressor starts but stops

after a short interval.

. Blowers run on cool and compressor starts and runs, but

compressor occasionally stops (on overload device).

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

Trouble Cause Cure

a. No power

b. Faulty touchpad/thermostat. 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 touchpad/thermostat. e. Faulty connection at touchpad/thermostat 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).

Def ectiv e comp resso r motor (short circ uited , open

circuited, grounded).

Operation of overload device due to overloading com-

pressor motor.

a. Low voltage due to overload circuits within building or

throughout the local power system. Due to varying power demands, this condition might exist only at certain times during the day or on very hot days.

High voltage due to uctuations in local power system;

usually occurs during low load periods of the day

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.

Faulty touchpad/thermostat.

b. Open circuited blower motor.

c. Blower rubbing against its housing. d. Bearings on blower motor seized. e. Loose connection at touchpad/thermostat.

a. Check supply line fusses, circuit breakers, and be sure

the power is on. Blown fuses would indicate circuit overloading, a short circuit, or a ground condition in the circuit Voltage supply to the equipment should be checked. Voltage underload must be within 10% of voltage given on date plate.

Replace.

b. c Tighten.

a. Adjust Rotate control knob to “Cooler.” b. Close heat valve. c. Check as above. d. Replace. e. Tighten. f. Replace. g. Tighten. h. Replace. i. Tighten.

j. Replace. k. * Ship cooling chassis prepaid to nearest McQuay au

thorized warranty station.

Check voltage supply. Clean condenser inside and out.

Check at outside face of condenser for recirculation of condenser air. Put air “splitters” in, if missing. Check compressor for short circuit. If defective, ship cooling chassis

to nearest McOuay authorized warranty station.

Run separate electric line to equipment Consult local

power company.

b. Consult local power company.

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

McOuay authorized warranty station.

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

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

then stops.

7. Equipment gives electrical shock.

8. Insufcient cooling capacity.

a. Operation of the internally connected overload device

due to a short circuit in blower motor.

Windings, rubbing of blower wheel or lack of lubrication

in blower motor bearings. a. Grounded electrical circuit. a. Equipment standing too long without being run.

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

1) Dirty condenser.

2) 0bstructed louver on outer cabinet or wall box.

3) Condenser blower/fan not running.

4) Condenser blower/fan not up to speed.

5) Condenser blower/fan slipping on motor shaft.

6) Recirculation of condenser air.

c. Insufcient airow through evaporator due to:

1) Dirty evaporator.

2) Ice on evaporator coils.

3) Dirty air lter.

4) Obstructed discharge grilles.

5) Evaporator blower motor not running.

6) Evaporator blower motor not up to speed.

7) Evaporator motor slipping on motor shaft.

d. Heat load in room exceeds capacity of equipment. e. Windows and doors in room are open f. Compressor not pumping, indicated by:

1) Low wattage.

2) Condenser not warm, evaporator only

partially cool or not at all . g. Restricted capillary or strainer.

1 ) Frost on capillary or strainer

2) Low wattage.

3) Condenser not warm.

4) Evaporator partially frosted, only partially cool

or not at all.

a. Replace motor

b. Adjust blower wheel or motor, or replace.

a. Eliminate ground. a. If the air conditioner is allowed to stand for an extended

length of time without being run on cool, it is possible for all the refrigerant to become absorbed in the oil inside the compressor and refrigeration circuit. If this should happen there will be no cooling until the necessary working pressures have been established. This will take about 5 minutes of continuous running.

Clean.

2) Remove obstructions.

3) Check same as in the case of malfunctioning

condenser air blower.

4) Check for correct voltage. Replace blower motor

if necessary

5) Adjust blower position and tighten setscrews.

6) Correct as in No 3 above.

1) Clean.

2) Turn equipment off to let ice melt (see last

two items of No. 9 “Too much cooling,” on page 37.

3) Clean or replace.

4) Remove obstructions.

5) Check as in No. 1.

6) Check for correct voltage.

7) Adjust blower wheel position and tighten setscrew

d. Refer to original load calculations, recalculate heat load. e. Close them. f. * Ship prepaid to nearest McQuay warranty station.

g. * Ship prepaid to nearest McOuay warranty

station.

Replace motor if necessary.

IM 950-1 / Page 35 of 38

Page 36

Troubleshooting

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

Trouble Cause Cure

9. Too much cooling.

10. “Sweating.”

11. Blowers won’t operate on Heat.

12. Equipment is noisy.

13. Insufcient or no heat.

a. Thermostat set too low. b. Defective thermostat

a. Condensate drain from evaporator to condenser

plugged.

Insulating seals on equipment damaged.

b. c. Evaporator blower motor not up to speed. d. Evaporator blower incorrectly positioned.

a. No power.

b. Heat is off (equipment with heat fan lock out).

c. Faulty touchpad/thermostat. d. Loose connections at touchpad/thermostat. e. Thermostat set too low.

a. Blower rubbing against enclosure. b. Blower motor bearings dry.

c. Loose blower hold-down nuts on motor-bracket assembly d. Refrigerant absorbed in compressor oil after extended shutdown. e. Equipment improperly installed. f. Damper solenoid hums.

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

j. Harmonics. a. No steam or hot water being applied.

b. No power.

c. Faulty touchpad/thermostat. d. Loose connection at touchpad/thermostat. e. Thermostat set too high. f. Thermostat faulty. g. No power output on transformer secondary. h. Inoperative valve.

1) Steam valve N/C.

2) Hot water valve N/C.

a. Adjust. b. Replace.

a. Remove obstructions to water ow.

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

a. See No. 1.

b. Open heat valve or turn on heating system.

c. Replace. d. Tighten. e. Adjust. Rotate control knob to “warmer”.

a. Adjust fan position on motor shaft or reposition fan

motor bracket assembly. b. Replace motor. c. Align blower assembly and tighten nuts.

d. Noise will disappear after equipment runs awhile. e. Make necessary adjustments to components.

f. Check for proper adjustment. Apply silicone oil or

grease to gap between solenoid and armature. g.

Tighten.

h. Fasten securely.

i. Occasionally equipment will have noise for no ap

parent reason. Inspection has revealed no loose

components that might be the source of the noise.

Due to the action of the compressor, it is possible to

have internal noise develop if the refrigerant tubing has

become bent even slightly. To distinguish this condition

from the simple rattle producing vibration caused by

loose screws, nuts and other components, grasp the

refrigerant tubing at various points throughout the sys-

tem until a point is found where the noise is eliminated

or reduced. Bend the copper tubing very gently until the noise disappears.

Tighten.

j. a. Contact building management.

b. Check power supply line fuse, circuit breakers. Blown

fuses would indicate circuit overloading, a short circuit,

or a grounded condition in the circuit.

Replace.

c. d. Replace wire or tighten. e. Adjust. Rotate knob to “warm”. f. Replace. g. Replace. h.

1) Temporarily lock valve open; replace.

2) Replace.

Notes:

This guide was prepared with standard equipment in mind. If equipment is special, it may not be entirely applicable.

If equipment is still in warranty.

* ** Note: Before trying to correct the noise, determine its cause: conditioned air blower, compressor or condenser blower. Operate the conditioned air blowers only. If this doesn’t cause the noise, operate on cooling. Then disconnect one compressor lead. If the noise stops, the compressor is the source, If not, it is caused by the condenser blower.

IM 950-1 / Page 36 of 38

Page 37

Unit Weight - (lbs.)

Model 007 009 012 015 017

PDHE (Packaged) 131.0 138.5 139.4 147.1 – PDAE (Packaged) 129.5 137.0 137.9 145.6 145.6 PDHE (Chassis) 116.0 123.5 124.4 132.1 – PDAE (Chassis) 114.5 122.0 122.9 130.6 130.6

Louvers

Flush-stamped ...............................................6 lbs. (3kg)

Architectural .................................................8 lbs. (3kg)

Subbase

3" (76mm) High Electrical .........................10 lbs. (5kg).

4" (102mm) High Electrical .....................12 lbs. (5.4kg)

8" (203mm) High Hydronic ........................20 lbs. (9kg)

IM 950-1 / Page 37 of 38

Page 38

McQuay Training and Development

Now that you have made an investment in modern, efcient McQuay equipment, its care should be a high priority.

For training information on all McQuay HVAC products, please visit us at www.mcquay.com and click on training, or call 540-248-9646 and ask for the Training Department.

Warranty

All McQuay equipment is sold pursuant to its standard terms and conditions of sale, including Limited Product Warranty. Consult your local McQuay Representative for warranty details. Refer to Form

933-43285Y. To nd 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.