Friedrich PTAC - R410A User Manual

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Service Manual

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PTAC - R410A Models

Packaged Terminal Air Conditioners

Packaged Terminal Heat Pumps

PD-ServMan-E(2-11)

CUSTOMER SATISFACTION and QUALITY ASSURANCE

Friedrich is a conscientious manufacturer, concerned about customer satisfaction, product quality, and controlling warranty costs. As an Authorized Service Provider you play a vital role in these areas. By adhering to the policies and procedures you provide us with vital information on each warranty repair you complete.

This information is used to identify product failure trends, initiate corrective action, and improve product quality, thereby further reducing warranty expenses while increasing customer satisfaction levels.

CHARGES TO CUSTOMER

The customer/end user is not to be charged for any warranty repairs to correct defects in materials or workmanship in accordance with the specifi c warranty provisions outlined in the product’s warranty certifi cate.

FRIEDRICH AUTHORIZED PARTS DEPOTS

AAA Refrigeration Service

The Gabbert Company

Reeve Air Conditioning, Inc.

1322 24th Street, Suite B

6868 Ardmore

2501 South Park Road

Kenner, Louisiana 70062

Houston, Texas 77054

Hallandale, Florida 33009

504-464-7444

713-747-4110

954-962-0252

877-813-7444

800-458-4110

800-962-3383

Alamo Service Company

Johnstone Supply of Woodside

1450 North Flores Street

27-01Brooklyn Queens Expway

San Antonio, Texas 78212

Woodside, New York 11377

210-227-2450

718-545-5464

800-328-2450

800-431-1143

TECHNICAL SUPPORT

CONTACT INFORMATION

FRIEDRICH AIR CONDITIONING CO.

10001 Reunion Place, Ste. 500, San Antonio, TX 78216 (210) 546-0500877-599-5665x 261 FAX (210)546-0630Email: tac@friedrich.com

www.friedrich.com

Printed in the U.S.A.

Table of Contents

Important Safety Information ...........................................

2-4

Introduction .........................................................................

4

General Product Features ..................................................

5

HVAC Engineering Specifi cations ......................................

6

Component identifi cation ....................................................

7

Accessories .....................................................................

8-9

Unit Identifi cation ..............................................................

10

Chassis Specifi cations ......................................................

11

Cooling and Heating Performance ..............................

12-13

Electric Heat Data ............................................................

14

Electrical Rating Tables ....................................................

15

Power Cord Information ..............................................

15-17

Remote Wall Thermostat / Low Voltage

 

Wire Connections ........................................................

18-19

Digital Control Features ....................................................

20

Digital Control Operation ..................................................

21

Digital Control User Input Confi guration ...........................

22

Digital Control Diagnostics ................................................

23

Malfunction Analysis ....................................................

24-26

Components Testing ....................................................

27-28

Refrigeration System Sequence of Operation ...................

29

Sealed Refrigeration System Repairs ...............................

30

Refrigerant Charging .........................................................

31

Method Of Charging ..........................................................

31

Undercharged Refrigerant Systems .............................

31-32

Overcharged Refrigerant Systems ....................................

32

Restricted Refrigerant Systems .........................................

32

Capillary Tube Systems/Check Valve ..........................

33

Reversing Valve — Description/Operation ...................

34

Testing Coil ...................................................................

34

Checking Reversing Valves .....................................

34-35

Reversing Valve

 

Touch Testing Heating/Cooling Cycle ..........................

35

Procedure For Changing Reversing Valve ..............

35-36

Compressor Checks .....................................................

36

Locked Rotor Voltage Test ............................................

36

Single Phase Connections ............................................

36

Determine Locked Rotor Voltage ..................................

36

Locked Rotor Amperage Test ........................................

36

Single Phase Running & Locked Rotor Amperage ........

36

Checking the Overload ..................................................

36

External Overload ..........................................................

37

Compressor Single Phase Resistance Test ...................

37

Compressor Replacement ........................................

38-39

Routine Maintenance .....................................................

39

Troubleshooting Charts .............................................

40-41

Wiring Diagrams for Wall Mounted Thermostats .......

42-43

Wiring Diagram .........................................................

42-44

RT6 Installation, Operation and Application Guide ...

45-46

Thermistors Resistance Values ................................

47-48

Warranty ..........................................................................

.....49

2011 PTAC Exploded View ..........................................

.....50

2011 PTAC Parts List - PDE Models ...........................

.....51

2011 PTAC Parts List - PDH Models ...........................

.....52

1

IMPORTANT SAFETY INFORMATION

The information contained in this manual is intended for use by a qualifi ed service technician who is familiar with the safety procedures required for installation and repair, and who is equipped with the proper tools and test instruments required to service this product.

Installation or repairs made by unqualifi ed persons can result in subjecting the unqualifi ed person making such repairs as well as the persons being served by the equipment to hazards resulting in injury or electrical shock which can be serious or even fatal.

Safety warnings have been placed throughout this manual to alert you to potential hazards that may be encountered. If you install or perform service on equipment, it is your responsibility to read and obey these warnings to guard against any bodily injury or property damage which may result to you or others.

Your safety and the safety of others are very important.

We have provided many important safety messages in this manual and on your appliance. Always read and obey all safety messages.

This is a safety Alert symbol.

This symbol alerts you to potential hazards that can kill or hurt you and others.

All safety messages will follow the safety alert symbol with the word “WARNING” or “CAUTION”. These words mean:

WARNING

CAUTION

You can be killed or seriously injured if you do not follow instructions.

You can receive minor or moderate injury if you do not follow instructions.

All safety messages will tell you what the potential hazard is, tell you how to reduce the chance of injury, and tell you what will happen if the instructions are not followed.

A message to alert you of potential property damage will have the NOTICE word “NOTICE”. Potential property damage can occur if instructions

are not followed.

2

PERSONAL INJURY OR DEATH HAZARDS

ELECTRICAL HAZARDS:

Unplug and/or disconnect all electrical power to the unit before performing inspections, maintenance, or service.

Make sure to follow proper lockout/tag out procedures.

Always work in the company of a qualifi ed assistant if possible.

Capacitors, even when disconnected from the electrical power source, retain an electrical charge potential capable of causing electric shock or electrocution.

Handle, discharge, and test capacitors according to safe, established, standards, and approved procedures.

Extreme care, proper judgment, and safety procedures must be exercised if it becomes necessary to test or troubleshoot equipment with the power on to the unit.

Do not spray or pour water on the return air grille, discharge air grille, evaporator coil, control panel, and sleeve on the room side of the air conditioning unit while cleaning.

Electrical component malfunction caused by water could result in electric shock or other electrically unsafe conditions when the power is restored and the unit is turned on, even after the exterior is dry.

Never operate the A/C unit with wet hands.

Use air conditioner on a single dedicated circuit within the specifi ed amperage rating.

Use on a properly grounded outlet only.

Do not remove ground prong of plug.

Do not cut or modify the power supply cord.

Do not use extension cords with the unit.

Follow all safety precautions and use proper and adequate protective safety aids such as: gloves, goggles, clothing, adequately insulated tools, and testing equipment etc.

Failure to follow proper safety procedures and/or these warnings can result in serious injury or death.

REFRIGERATION SYSTEM HAZARDS:

Use approved standard refrigerant recovering procedures and equipment to relieve pressure before opening system for repair.

Do not allow liquid refrigerant to contact skin. Direct contact with liquid refrigerant can result in minor to moderate injury.

Be extremely careful when using an oxy-acetylenetorch. Direct contact with the torch’s fl ame or hot surfaces can cause serious burns.

Make sure to protect personal and surrounding property with fi re proof materials.

Have a fi re extinguisher at hand while using a torch.

Provide adequate ventilation to vent off toxic fumes, and work with a qualifi ed assistant whenever possible.

Always use a pressure regulator when using dry nitrogen to test the sealed refrigeration system for leaks, fl ushing etc.

3

Make sure to follow all safety precautions and to use proper protective safety aids such as: gloves, safety glasses, clothing etc.

Failure to follow proper safety procedures and/or these warnings can result in serious injury or death.

MECHANICAL HAZARDS:

Extreme care, proper judgment and all safety procedures must be followed when testing, troubleshooting, handling, or working around unit with moving and/or rotating parts.

Be careful when, handling and working around exposed edges and corners of sleeve, chassis, and other unit components especially the sharp fi ns of the indoor and outdoor coils.

Use proper and adequate protective aids such as: gloves, clothing, safety glasses etc.

Failure to follow proper safety procedures and/or these warnings can result in serious injury or death.

PROPERTY DAMAGE HAZARDS

FIRE DAMAGE HAZARDS:

Read the Installation/Operation Manual for this air conditioning unit prior to operating.

Use air conditioner on a single dedicated circuit within the specifi ed amperage rating.

Connect to a properly grounded outlet only.

Do not remove ground prong of plug.

Do not cut or modify the power supply cord.

Do not use extension cords with the unit.

Failure to follow these instructions can result in fi re and minor to serious property damage.

WATER DAMAGE HAZARDS:

Improper installation maintenance, or servicing of the air conditioner unit, or not following the above Safety Warnings can result in water damage to personal items or property.

Insure that the unit has a suffi cient pitch to the outside to allow water to drain from the unit.

Do not drill holes in the bottom of the drain pan or the underside of the unit.

Failure to follow these instructions can result in result in damage to the unit and/or minor to serious property damage.

INTRODUCTION

This service manual is designed to be used in conjunction with the installation manuals provided with each unit.

This service manual was written to assist the professional HVAC service technician to quickly and accurately diagnose and repair any malfunctions of this product.

This manual, therefore, will deal with all subjects in a general nature. (i.e. All text will pertain to all models).

IMPORTANT: It will be necessary for you to accurately identify the unit you are servicing, so you can be certain of a proper diagnosis and repair. (See Unit Identifi cation.)

4

General Product Features

DIAMONBLUE

Diamonblue seacoast protection protects the outdoor coil from harsh environments. Comes standard

TECHNOLOGY

on all models.

 

 

DIGITAL DEFROST

The new Friedrich PTAC uses a digital thermostat to accurately monitor the outdoor coil conditions to al-

low the heat pump to run whenever conditions are correct. Running the PTAC in heat pump mode saves

THERMOSTAT

energy and reduces operating costs. The digital thermostat allows maximization of heat pump run time.

 

 

 

INSTANT HEAT

Heat pump models will automatically run the electric heater to quickly bring the room up to temperature

when initially energized, then return to heat pump mode. This ensures that the room is brought up to

HEAT PUMP MODE

temperature quickly without the usual delay associated with heat pump units.

 

 

 

EVEN HEAT MONITORING

of the setpoint. If necessary, the unit will cycle the electric heat to maintain the temperature. This feature

 

-

 

 

 

The owner may choose between fan cycling or fan continuous mode based on property preference. (Note:

 

Even heat monitoring and quiet start/stop fan delay only operate in fan cycle mode) Fan continuous mode is

SEPARATE HEAT/COOL

 

FAN CYCLE

energy by only operating the fan while the compressor or electric heater is operating. The ability to set the

CONTROL

fan cycling condition independently between heating and cooling mode will increase user comfort by

 

allowing the choice of only constantly circulating air in the summer or winter time. Unlike other PTAC

 

brands that only allow one selection.

 

 

EMERGENCY

In the event of a compressor failure in heat pump mode, the compressor may be locked out to provide

heat through the resistance heater. This feature ensures that even in the unlikely event of a compressor

HEAT OVERRIDE

failure, the room temperature can be maintained until the compressor can be serviced.

 

 

 

DESK CONTROL

All Friedrich digital PTACs have low voltage terminals ready to connect a desk control energy manage-

ment system. Controlling the unit from a remote location like the front desk can reduce energy usage and

READY

requires no additional accessories on the PTAC unit.

 

 

 

INDOOR COIL

temperatures cause the indoor coil to freeze. When the indoor coil reaches 30°F, the compressor is

FROST SENSOR

disabled and the fan continues to operate based on demand. Once the coil temperature returns to 45°F,

 

the compressor returns to operation.

 

 

ULTRA QUIET

The new Friedrich PD series units feature an indoor fan system design that reduces sound levels without

AIR SYSTEM

 

 

 

HIGH EFFICIENCY

The Friedrich PTAC has been engineered so that all functional systems are optimized so that they work

together to deliver the highest possible performance.

 

 

 

DUAL MOTOR

With Friedrich’s new dual-motordesign the indoor motor can run at slower speeds which reduces sound

levels indoors.

 

 

 

ROTARYCOMPRESSOR

-

ciency.

 

 

 

STAINLESS STEEL

Outdoor coil endplates made from stainless steel reduce corrosion on the outdoor coil common with other

ENDPLATES

coil designs.

 

 

TOP -MOUNTED

 

ANTIMICROBIAL

 

AIR FILTERS

front cover.

 

 

 

FILTERED FRESH

Friedrich PTAC units are capable of introducing up to 75 CFM of outside air into the conditioned space.

AIR INTAKE

The outdoor air passes through a washable mesh screen to prevent debris from entering the airstream.

 

 

R-410AREFRIGERANT

Friedrich PTAC units use environmentally-friendlyrefrigerant.

 

 

5

Digital Packaged Terminal Air Conditioners & Heat Pumps

Cooling: 7600 – 15,000 Btuh

Heating: 7600 – 14500 Btuh (Heat Pump) 6824 – 17060 Btuh (Electric Heat)

Friedrich Models: PDE – Cooling with or without electric heat PDH – Heat Pump with electric heat

All units shall be factory assembled, piped, wired and fully charged with

310 for air conditioners and ARI standard 380 for heat pumps. Units shall be UL listed and carry a UL label. All units shall be factory runtested to check operation and be Friedrich or equivalent.

The basic unit shall not exceed 16” high x 42” wide. Overall depth of the unit from the rear of the Friedrich wall sleeve to the front of the decorative front cover shall not exceed 21 ¼”. The unit shall be designed so that room intrusion may be as little as 7 ½”. Installations in walls deeper than 13 ¼” may be accomplished with the use of a deep wall sleeve (PDXWSEXT). Unit shall draw in ambient air through both sides of an outdoor architectural louver or grille measuring 42” wide x 16” high and shall exhaust air out middle portion of the louver. The architectural louver and wall sleeve shall be designed so that the louver may be installed from the inside of the building.

REFRIGERATION SYSTEM – The refrigeration system shall be hermetically sealed and consist of a rotary compressor that is externally mounted on vibration isolators no smaller than 1 3/8” dia. x 1 ½” high; condenser and evaporator coils constructed of copper tubes and

and have a drain pan capable of retaining 1 ½ gallons of condensate. A tertiary condensate removal system shall also be incorporated for

of the building as a safeguard against damage to the interior room.

INDOOR AIR HANDLING SECTION – The indoor air handling section shall consist of a tangential blower wheel direct driven by a totally enclosed motor. The air handling system shall be designed to minimize

fan must have three fan speeds that may be selected by the user.

throughout the room. The grille shall be reversible to allow a change

personal injury or damage to the unit.

and reusable by cleaning with water or by vacuuming.

The chassis shall have a built-indamper capable of providing at least

damper closed to ensure a proper seal.

OUTDOOR AIR HANDLING SECTION – The outdoor air section shall consist of a single injection molded fan shroud that incorporates the outdoor motor mount into a single piece for ease of service and assembly. The outdoor motor shall be totally enclosed,ball-bearing,permanently lubricated and directly drive the outdoor fan/slinger ring.

CONTROLS – Covered controls shall be accessible in a compartment at least 7½” wide with the controls no deeper than 1 ¼” in the opening to facilitate easy operation of the unit.

The unit controls shall feature a soft blue LED readout that can display either room temperature or setpoint temperature. The unit shall receive input from the digital control panel through push buttons labeled: ‘Cool’, ‘Heat’, ‘High Fan’, ‘Med Fan’, ‘Low Fan’, ’, ‘ ’ and ‘Power’. When ‘Off’, the unit may be put directly into cooling or heating mode by pressing the ‘Cool’ or ‘Heat’ button.

The unit must have the following energy saving and convenience features built-in:

Quiet start/stop fan delay

Fan cycle control for cooling and heating independently

Room freeze protection

Random compressor restart

Electronic temperature limiting

The PTAC must also offer the ability to be controlled by a remote wallmounted thermostat without additional accessories. Low voltage inputs will include: C (common), R (24V power), Y (cooling), GL (fan low), GH (fan high), W (heat) and O (reversing valve on PDH heat pumps only).

PTAC models shall use a single stage cool / single stage heat thermostat. PTHP models shall use a single stage cool / two-stageheat thermostat. An accessory thermostat must be available from the manufacturer, RT6 or equivalent. The RT6 thermostat will provide temperature setpoint, mode selection from cool, heat and fan modes. The thermostat must also allow the selection of fan speed between high and low speed.

Other controls accessible without removal of the chassis shall include fan cycle switch, fresh air vent control and emergency heat override switch (heat pump only).

ELECTRICAL CONNECTION – All PTAC/PTHP units shall come from the factory with a power cord installed. All 230/208V power cords shall feature a leakage current detection device on the plug head. All units shall feature a6-pinconnector for removal of the power cord. The power cord shall be interchangeable to allow changes to the heater output based on the property/electrical requirements.

GENERAL CONSTRUCTION – The wall sleeve shall be constructed of18-gaugeGalvanizedzinc-coatedsteel. It shall be prepared by a process where it is zinc phosphate pretreated and sealed with a

cured for durability. The sleeve shall be shipped with a protective weatherboard and a structural center support, and be insulated for

shipped separately and made from stamped or extruded anodized aluminum. All louvers shall be in the horizontal plane.

clips. As an option the cover may be attached by two screws to prevent tampering. The front panel will feature a contoured discharge with no sharp corners.

CORROSION PROTECTION – The unit shall havecorrosion-resistantfans, fan shroud and drain pan for corrosion protection and to prevent rust on the side of the building below the outdoor louver. The unit shall- rioration. The outdoor coil shall have Diamonblue corrosion protection

applications including seacoast environments. All outdoor coils shall also have stainless steel endplates to eliminate rusting of the endplates.

WARRANTY – The warranty is one year on all parts and 5 years on the sealed system including compressor, indoor and outdoor coils and refrigerant tubing.

6

Component Identification

Typical Unit Components and Dimensions

WALL SLEEVE

 

DISCHARGE

OUTDOOR GRILLE

 

GRILLE

 

FILTERS

CHASSIS RETURN AIR GRILLE

FRONT COVER

PDXWS WALLSLEEVEDIMENSIONS:

16" H X 42" WX 13-¾"D

FRONTCOVERDIMENSIONS:

16" H X 42" WX 7-¾"D

CUT-OUTDIMENSIONS:

16-¼"X 42-¼"

7

ACCESSORIES

NEWCONSTRUCTIONACCESSORIES

PDXWS

WALL SLEEVE Galvanized zinc coated steel is prepared in an11-step

 

 

 

 

oven for exceptional durability. The wall sleeve is insulated for sound

 

 

 

PDXWS

PDXWSEXT

DEEP WALL SLEEVE EXTENSION For use when the wall is thicker

 

than 13 1/4”deep. The wall sleeve may be special ordered through your

 

 

 

 

-

 

 

ments..

 

 

 

PDXWSEXT

 

 

 

PXGA

GRILLE Standard, stamped aluminium, anodized to resist chalking and

 

oxidation.

 

 

 

 

 

 

PXAA

ARCHITECTURAL GRILLES Consist ofheavy-gauge6063-T5alumi-

 

num alloy:

 

PXBG

PXGA

PXAA – Clear, extruded aluminum

PXSC

 

PXBG – Beige acrylic enamel

 

 

 

 

PXSC – Also available in custom colors.

 

 

 

PXAA

 

 

 

PXDR10

CONDENSATE DRAIN KIT Attaches to the bottom of the wall sleeve for

 

-

 

 

 

 

nal draining. Recommended on all units to remove excess condensate.

 

 

Packaged in quantities of ten.

 

 

 

 

PXSB

DECORATIVE SUBBASE Provides unit support for walls less than

 

-

 

 

 

 

ing brackets for electrical accessories. Accepts circuit breaker, power

 

 

disconnect switch, or conduit kit.

 

 

 

 

RT6

DIGITAL REMOTE WALL THERMOSTAT Single stage cool, single

 

stage heat for PDE models or single stage cool, dual stage heat for

 

 

 

 

PDH model thermostat features high/low fan speed switch. Thermostat

 

 

is hard wired and can be battery powered or unit powered. Features

 

 

Friedrich PTACs and Vert-I-Paks.

 

 

 

 

PDXRTA

REMOTE THERMOSTAT ESCUTCHEON KIT This kit contains ten

 

escutcheons that can be placed over the factory control buttons when

 

 

 

 

a remote wall mounted thermostat is used. The escutcheon directs the

 

 

guest to the wall thermostat for operation and retains the LED window to

 

 

display error codes and diagnostic information.

 

 

 

 

PXSE

SLEEVE EXTENSION RETROFIT KIT Galvanized zinc coated steel,

 

2.4" sleeve extension attached to the room side of the sleeve to allow for

 

 

 

 

the installation of a PD-SeriesFriedrich PTAC in aT-Seriessleeve.

 

 

 

 

PDXDAA

LATERAL DUCT ADAPTER Attaches to the PTAC/PTHP unit and

 

provides a transition to direct up to 35% of the total CFM to a second-

 

 

 

 

ary room, either left or right of the unit. Kit includes duct plenum with

 

 

 

 

PDXDEA

LATERAL DUCT EXTENSION Athree-footinsulated plenum that at-

 

taches to the left or right side of the duct adapter. The extension can be

 

 

 

 

cut to length by the installer. Maximum allowable straight extension is 15

 

 

feet.

 

 

 

 

8