Service Manual

A SERIES

For Years 2009 and 2008

*(Electronic Control)

Single Package

Vertical Air Conditioning System

Models

9,000 BTU’s

VPK-ServMan (04-09)

12,000 BTU’s

18,000 BTU’s

24,000 BTU’s

TECHNICAL SUPPORT

CONTACT INFORMATION

FRIEDRICH AIR CONDITIONING CO.

Post Office Box 1540 · San Antonio, Texas 78295-1540

4200 N. Pan Am Expressway · San Antonio, Texas 78218-5212

(210) 357-4400 · FAX (210) 357-4490 www.friedrich.com

Printed in the U.S.A.

Table of Contents

Important Safety Information .............................................2

Introduction ........................................................................4

Vert-I-Pak Model Number Identification Guide ..................5

Serial Number Identification Guide ....................................5

2009 Models Chassis Specifications/Performance .........6-7

2008 Models Chassis Specifications/Performance .........8-9

Electrical Requirements ....................................................10

Remote Thermostat and Low Voltage Control .............11-12

V-PAK Electronic Control Board Features ........................13

Electronic Control Configuration .......................................14

Electronic Control Error Code

Diagnostics/Test Mode ................................................14-15

Electronic Control Board/Wall Thermostat

Sequence of Operation ...............................................16-18

Component Description ....................................................19

Checking External Static Pressure ...................................20

Checking Approximate Airflow ..........................................20

Airflow Charts ...................................................................21

Components Testing ....................................................22-23

Refrigeration Sequence of Operation ...............................24

Service ..............................................................................25

Sealed Refrigeration System Repairs ...............................26

Refrigerant Charging .........................................................26

Method Of Charging ..........................................................27

Undercharged Refrigerant Systems ..................................28

Overcharged Refrigerant Systems ....................................28

Restricted Refrigerant Systems ........................................29

Capillary Tube Systems/Check Valve ...............................30

Reversing Valve — Description/Operation ....................31

Testing Coil ....................................................................32

Checking Reversing Valves ...........................................32

Reversing Valve

Touch Testing Heating/Cooling Cycle ...........................33

Procedure For Changing Reversing Valve ....................33

Compressor Checks ......................................................34

Locked Rotor Voltage Test ............................................34

Single Phase Connections ...........................................34

Determine Locked Rotor Voltage .................................34

Locked Rotor Amperage Test ........................................34

Single Phase Running & Locked Rotor Amperage .......35

External Overload .........................................................34

Checking the External Overload ...................................34

Checking the Internal Overload ....................................34

Compressor Single Phase Resistance Test .................35

Compressor Replacement ......................................36-37

Routine Maintenance ..............................................38-39

9-18 Electrical Troubleshooting Chart – Cooling .........40

2-Ton Electrical Troubleshooting Chart – Cooling .......41

Refrigerant System Diagnosis – Cooling .....................42

Refrigerant System Diagnosis – Heating .....................43

Electrical Troubleshooting Chart –Heat Pump .............43

Electrical and Thermostat Wiring Diagram .............44-49

Thermistors Resistance Valves ...................................50

Accessories .................................................................51

Warranty ......................................................................52

1

2

IMPORTANT SAFETY INFORMATION

The information contained in this manual is intended for use by a qualified 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 unqualified persons can result in subjecting the unqualified 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

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

CAUTION

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.

NOTICE

A message to alert you of potential property damage will have the word “NOTICE”. Potential property damage can occur if instructions are not followed.

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 qualified 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 specified 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-acetylene torch. Direct contact with the torch’s flame or hot surfaces can cause serious burns.

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

Have a fire extinguisher at hand while using a torch.

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

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

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 fins 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.

3

4

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 specified 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 fire 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 sufficient 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 Identification.)

Rigid Ductwork

58"

Exterior Wall

Flexible Ductwork

VPAWP1-8/1-14 Wall Plenum

Plenum Divider

Power

Disconnect

29"

VPRG4 Access Panel &

Return Air Filter Grille installed drain pan

(refer to local codes)

Optional Platform

3" Clearance on all three sides minimum for service and installation

Chassis is shipped with vibration isolators installed

VPDP1 drain pan beneath unit is required on all

VEA/VHA24 units. Drain pan must be installed prior to chassis installation

Model Identifi cation Guide

MODEL NUMBER

SERIES

V=Vertical Series

E=Cooling with or without electric heat

H=Heat Pump

DESIGN SERIES

A = 32" and 47" Cabinet

V E A 24 K 50 RT A

NOMINAL CAPACITY

A-Series (Btu/h)

09 = 9,000

12 = 12,000

18 = 18,000

24 = 24,000

VOLTAGE

K = 208/230V-1Ph-60Hz

EN GI NEER ING CODE

OPTIONS

RT = Stan dard Re mote Op er a tion

SP = Sea coast Pro tect ed

ELECTRIC HEATER SIZE

A-Series

00 = No electric heat

25 = 2.5 KW

34 = 3.4 KW

50 = 5.0 KW

75 = 7.5 KW

10 = 10 KW

SERIAL NUMBER

YEAR MANUFACTURED

LK = 2000

LA = 2001

LB = 2002

LC = 2003

LD = 2004

LE = 2005

LF = 2006

LG = 2007

LH = 2008

LJ = 2009

Serial Number Identifi cation Guide

L J A V 0 0 0 0 1

PRODUCTION RUN NUMBER

PRODUCT LINE

N = VPAK

V = VPAK

MONTH MANUFACTURED

A = Jan D = Apr G = Jul K = Oct

B = Feb E = May H = Aug L = Nov

C = Mar F = Jun J = Sep M = Dec

5

2009 Chassis Specifications

VEA/VHA09-24

VEA09K

C O O L I N G D A T A

Cooling Btu/h

Cooling Power (W)

EER

Sensible Heat Ratio

9500/9300

880

10.8

0.74

H E A T P U M P D A T A

Heating Btu/h

COP @ 47°F

N/A

N/A

Heating Power (W)

Heating Current (A)

N/A

N/A

VEA12K

11800/11500

1093

10.8

0.72

N/A

N/A

N/A

N/A

VEA18K

17500/17300

1882

9.3

0.70

N/A

N/A

N/A

N/A

VEA24K

24000

2526

9.5

0.70

N/A

N/A

N/A

N/A

E L E C T R I C A L D A T A

Voltage (1 Phase, 60 Hz)

Volt Range

Cooling Current (A)

Amps L.R.

230/208

253-198

4.1/4.3

21

Amps F.L.

Indoor Motor (HP)

Indoor Motor (A)

Outdoor Motor (HP)

Outdoor Motor (A)

A I R F L O W D A T A

3.7

1/4

1.2

N/A

N/A

Indoor CFM*

Vent CFM

Max. ESP

P H Y S I C A L D A T A

300

60

.3"

Dimensions (W x D x H)

Net Weight (Lbs)

Shipping Weight (Lbs)

R-22 Charge

230/208

253-198

4.9/5.3

21

4.5

1/4

1.2

N/A

N/A

350

60

.3"

230/208

253-198

8.4/9.0

42

7.5

1/4

1.2

N/A

N/A

450

60

.3"

230/208

253-198

11.2/12.4

68

10.2

1/4

2

1/4

2

610

80

.4"

23⅛ x 23⅛ x 32¾ 23⅛ x 23⅛ x 32¾ 23⅛ x 23⅛ x 32¾ 23⅛ x 23⅛ x 47¼

114

125

25

124

135

29

144

155

42

167

180

68.5

* Normal Value Wet Coil @ .1" ESP.

VHA09K

9500/9300

905

10.5

0.74

8500/8300

3.0

830

4.4/4.9

230/208

253-198

4.2/4.4

21

3.7

1/4

1.2

N/A

N/A

300

60

.3"

VHA12K

11800/11500

1124

10.5

0.72

VHA18K

17500/17300

1882

9.3

0.70

10600/10400 17000/16800

3.2

3.0

971

5.5/6.1

1560

7.5/8.2

230/208

253-198

5.0/5.5

21

4.5

1/4

1.2

N/A

N/A

420

60

.3"

230/208

253-198

8.4/9.2

42

7.5

1/4

1.2

N/A

N/A

450

60

.3"

VHA24K

23500

2474

9.5

0.70

22500

3.0

2200

11.4

230/208

253-198

11.2/12.4

68

10.2

1/4

2

1/4

2

610

80

.4"

23⅛ x 23⅛ x 32¾ 23⅛ x 23⅛ x 32¾ 23⅛ x 23⅛ x 32¾

114

125

23.5

125

135

27

144

155

42

23⅛ x 23⅛ x 47¼

167

180

63.5

6

2009 Electric Heat Data

VEA/VHA09,12

HEATER WATTS

VOLTAGE

HEATING BTUh

HEATING CURRENT (AMPS)

MINIMUM CIRCUIT AMPACITY

BRANCH CIRCUIT FUSE (AMPS)

BASIC HEATER SIZE

VE/VHA09 VE/VHA12

2500/2050 3400/2780 5000/4090 2500/2050 3400/2780 5000/4090

230/208 230/208

8500/7000 11600/9500 17000/13900 8500/7000 11600/9500 17000/13900

10.6/9.3

14.5/12.5

20.9/18.2

10.6/9.3

14.5/12.5

20.9/18.2

15 19.9

27.9

15 19.9

27.9

15

2.5 Kw

20

3.4 Kw

30

5.0 Kw

15

2.5 Kw

20

3.4 Kw

30

5.0 Kw

VEA/VHA18,24

HEATER WATTS

VOLTAGE

HEATING BTUh

HEATING CURRENT (AMPS)

MINIMUM CIRCUIT AMPACITY

BRANCH CIRCUIT FUSE (AMPS)

BASIC HEATER SIZE

VE/VHA18 VE/VHA24

2500/2050 3400/2780 5000/4090 2500/2050 3400/2780 5000/4090 7500/6135 10000/8180

230/208 230/208

8500/7000 11600/9500 17000/13900 8500/7000 11600/9500 17000/13900 25598/20939 34130/27918

10.6/9.3

14.5/12.5

20.9/18.2

10.9/9.9

14.8/13.4

21.7/19.7

32.6/29.5

43.5/39.3

15

15

2.5 Kw

19.9

20

3.4 Kw

27.9

30

5.0 Kw

17.2/15.9

25/25

2.5 Kw

22.1/20.3

25/25

3.4 Kw

30.7/28.1

35/30

5.0 Kw

44.3/40.4

45/45

7.5 Kw

57.9/52.7

60/60

10.0 Kw

2009 Extended Cooling Performance

VEA - Extended Cooling Performance

VEA09

VEA12

VEA18

VEA24

OUTDOOR DRY BULB TEMP. (DEGREES F AT 40% R.H.)

75 85 95

INDOOR WET BULB TEMP. (DEGREES F AT 80 F D.B.)

105 110

72 67 62 72 67 62 72

67

62 72 67 62 72 67 62

BTUh 11172 10745 9947 10640 10032 9253 10222

9500

8408 9576 8503 7496 9049 7918 6987

WATTS 718 730 737 782 790 800 880

880

880 951 950 953 994 994 997

AMPS

SHR 0.51

0.69

0.93

0.52

0.71

0.95

0.52

0.74

0.95

0.53

0.78

0.96

0.55

0.81

0.95

BTUh 13877 13346 12355 13216 12461 11493 12697

11800

10443 11894 10561 9310 11240 9835 8679

WATTS 892

AMPS

3.4

4.1

3.4

906

4.1

3.5

916

4.1

3.7

972

4.4

3.7

982

4.4

3.7

994

4.4

4.1

1093

4.9

4.10

1093

4.90

4.1

1093

4.9

4.4

1182

5.3

4.4

1180

5.3

4.4

1184 1235 1235 1239

5.3

4.6

5.5

4.6

5.5

4.6

5.5

SHR 0.49

0.67

0.9

0.5

0.7

0.92

0.51

0.72

0.92

0.52

0.76

0.93

0.53

0.79

0.93

BTUh 20580 19793 18323 19600 18480 17045 18830 17500 15488 17640 15663 13808 16669 14586 12871

WATTS 1536 1560 1577 1673 1690 1711 1882

1882

1882 2034 2033 2038 2127 2126 2133

AMPS 7 7 7.1

7.5

7.5

7.6

8.4

8.40

8.4

9 9 9.1

9.5

9.5

9.5

SHR

BTUh 28224 27144 25128 26880 25344 23376 25824 24000 21240 24192 21480 18936 22860 20004 17652

WATTS 2061 2094 2117 2246 2268 2296 2526

2526

2526 2731 2728 2736 2854 2853 2863

AMPS 9.3

SHR

0.48

0.48

0.65

9.3

0.65

0.88

9.4

0.88

0.49

10

0.49

0.68

10

0.68

0.89

10.1

0.89

0.49

11.1

0.49

0.70

11.20

0.70

0.9

11.3

0.9

0.5

12.1

0.5

0.74

12.1

0.74

0.9

12.1

0.9

0.52

12.6

0.52

0.76

12.6

0.76

0.9

12.6

0.9

* Operation above these listed temperatures may result in lowered performance or unit fatigue.

RATING POINT

ARI 310/380

VHA - Extended Cooling Performance

75

OUTDOOR DRY BULB TEMP. (DEGREES F AT 40% R.H.)

85 95 105 110

72 67 62 72 67

INDOOR WET BULB TEMP. (DEGREES F AT 80 F D.B.)

62 72

67

62 72 67 62 72 67 62

BTUh 11172 10745 9947 10640 10032 9253 10222

9500

8408 9576 8503 7496 9049 7918 6987

VHA09

VHA12

VHA18

VHA24

WATTS 738

AMPS 3.5

SHR 0.51

750

3.5

0.69

758

3.5

0.93

805

3.7

0.52

813

3.8

0.71

823

3.8

0.95

905

4.2

0.52

905

4.20

0.74

905

4.2

0.95

978

4.5

0.53

977

4.5

0.78

980

4.5

0.96

1023 1022 1026

4.7

4.7

4.7

0.55

0.81

0.95

BTUh 13877 13346 12355 13216 12461 11493 12697

11800

10443 11894 10561 9310 11240 9835 8679

WATTS 917 932 942 999 1009 1022 1124

1124

1124 1215 1214 1217 1270 1270 1274

AMPS 4.1

4.2

4.2

4.5

4.5

4.5

5

5.00

5 5.4

5.4

5.4

5.6

5.6

5.6

SHR 0.49

0.67

0.9

0.5

0.7

0.92

0.51

0.72

0.92

0.52

0.76

0.93

0.53

0.79

0.93

BTUh 20580 19793 18323 19600 18480 17045 18830 17500 15488 17640 15663 13808 16669 14586 12871

WATTS 1536 1560 1577 1673 1690 1711 1882

1882

1882 2034 2033 2038 2127 2126 2133

AMPS 7

SHR 0.48

7

0.65

7.1

0.88

7.5

0.49

7.5

0.68

7.6

0.89

8.4

0.49

8.40

0.70

8.4

0.9

9

0.5

9

0.74

9.1

0.9

9.5

0.52

9.5

0.76

9.5

0.9

BTUh 27636 26579 24605 26320 24816 22889 25286 23500 20798 23688 21033 18542 22384 19587 17284

WATTS 2019 2051 2073 2199 2222 2249 2474

2474

2474 2674 2672 2679 2796 2794 2804

AMPS 9.3

9.3

9.4

10 10 10.1

11.1

11.20

11.3

12.1

12.1

12.1

12.6

12.6

12.6

SHR 0.48

0.65

0.88

0.49

0.68

0.89

0.49

0.70

0.9

0.5

0.74

0.9

0.52

0.76

0.9

* Operation above these listed temperatures may result in lowered performance or unit fatigue.

RATING POINT

ARI 310/380

7

2008 Chassis Specifications

VEA/VHA09-24

VEA09K

C O O L I N G D A T A

Cooling Btu/h

Cooling Power (W)

EER

Sensible Heat Ratio

H E A T P U M P D A T A

Heating Btu/h

COP @ 47°F

Heating Power (W)

Heating Current (A)

9500/9300

880

10.8

0.74

N/A

N/A

N/A

N/A

E L E C T R I C A L D A T A

Voltage (1 Phase, 60 Hz)

Volt Range

230/208

253-198

Cooling Current (A)

Amps L.R.

Amps F.L.

Indoor Motor (HP)

Indoor Motor (A)

Outdoor Motor (HP)

Outdoor Motor (A)

4.1/4.3

21

3.7

1/4

1.2

N/A

N/A

VEA12K

1093

10.8

0.72

N/A

N/A

N/A

N/A

230/208

253-198

4.9/5.3

21

4.5

1/4

1.2

N/A

N/A

VEA18K

11800/11500 18000/17800

2070

8.7

0.70

N/A

N/A

N/A

N/A

230/208

253-198

9.2/10.2

47

7.9

1/4

1.4

N/A

N/A

VEA24K

24000

2526

9.5

0.70

N/A

N/A

N/A

N/A

230/208

253-198

11.2/12.4

68

10.2

1/4

2

1/4

2

A I R F L O W D A T A

Indoor CFM*

Vent CFM

Max. ESP

300

60

.3"

350

60

.3"

550

60

.3"

750

80

.3"

P H Y S I C A L D A T A

Dimensions (W x D x H)

23⅛ x 23⅛ x 32¾ 23⅛ x 23⅛ x 32¾ 23⅛ x 23⅛ x 32¾ 23⅛ x 23⅛ x 47¼

Net Weight (Lbs) 114 124 144 167

Shipping Weight (Lbs)

R-22 Charge

125

25

135

29

155

42

180

68.5

* Normal Value Wet Coil @ .1" ESP.

VHA09K

9500/9300

905

10.5

0.74

8500/8300

3.0

830

4.4/4.9

230/208

253-198

4.2/4.4

21

3.7

1/4

1.2

N/A

N/A

300

60

.3"

VHA12K VHA18K

11800/11500 18000/17800

1124 2070

10.5

0.72

8.7

0.70

10600/10400 15700/15500

3.2

3.0

971

5.5/6.1

1705

9.2/10.2

230/208

253-198

5.0/5.5

21

4.5

1/4

1.2

N/A

N/A

375

60

.3"

230/208

253-198

9.2/10.2

47

7.9

1/4

1.4

N/A

N/A

550

60

.3"

VHA24K

23500

2474

9.5

0.70

22500

3

2200

11.4

230/208

253-198

11.2/12.4

68

10.2

1/4

2

1/4

2

750

80

.3"

23⅛ x 23⅛ x 32¾ 23⅛ x 23⅛ x 32¾ 23⅛ x 23⅛ x 32¾

114 125 144

125

23.5

135

27

155

42

23⅛ x 23⅛ x 47¼

167

180

63.5

8

2008 Electric Heat Data

VEA/VHA09,12

Heater Watts

V o tl a g e

Heating Btu/h

Heating Current (Amps)

Minimum Circuit Ampacity

Branch Circuit Fuse (Amps)

Basic Heater Size

2500/2050

8500/7000

10.6/9.3

15

15

2.5 Kw

V E / V H A 0 9

3400/2780

2 3 0 / 2 0 8

11600/9500

14.5/12.5

19.9

20

3.4 Kw

5000/4090

17000/13900

20.9/18.2

27.9

30

5.0 Kw

2500/2050

8500/7000

10.6/9.3

15

15

2.5 Kw

V E / V H A 1 2

3400/2780

2 3 0 / 2 0 8

11600/9500

14.5/12.5

19.9

20

3.4 Kw

5000/4090

17000/13900

20.9/18.2

27.9

30

5.0 Kw

VEA/VHA18,24

Heater Watts 2500/2050

V o tl a g e

V E / V

0 /

H A

2 0 8

1 8

3400/2780

2 3

5000/4090 2500/2050 3400/2780

V E / V H A 2 4

5000/4090

2 3 0 / 2 0 8

7500/6135 10000/8180

Heating Btu/h 8500/7000 11600/9500 17000/13900 8500/7000 11600/9500 17000/13900 25598/20939 34130/27918

Heating Current (Amps) 10.6/9.3

14.5/12.5

20.9/18.2

10.9/9.9

14.8/13.4

21.7/19.7

32.6/29.5

43.5/39.3

Minimum Circuit Ampacity

Branch Circuit Fuse (Amps)

Basic Heater Size

15

15

2.5 Kw

19.9

20

3.4 Kw

27.9

30

5.0 Kw

17.2/15.9

25/25

2.5 Kw

22.1/20.3

25/25

3.4 Kw

30.7/28.1

35/30

5.0 Kw

44.3/40.4

45/45

7.5 Kw

57.9/52.7

60/60

10.0 Kw

2008 Extended Cooling Performance

VEA - Extended Cooling Performance

VEA09

VEA12

VEA18

VEA24

75

OUTDOOR DRY BULB TEMP. (DEGREES F AT 40% R.H.)

85 95

INDOOR WET BULB TEMP. (DEGREES F AT 80 F D.B.)

105 110

72 67 62 72 67 62 72

67

62 72 67 62 72 67 62

BTUh 11172 10745 9947 10640 10032 9253 10222

9500

8408 9576 8503 7496 8522 7334 6479

WATTS 718 730 737 782 790 800 880

880

880 951 950 953 1038 1038 1042

AMPS

SHR 0.51

0.69

0.93

0.52

0.71

0.95

0.52

0.74

0.95

0.53

0.78

0.96

0.56

0.83

0.95

BTUh 13877 13346 12355 13216 12461 11493 12697 11800 10443 11894 10561 9310 10585 9110 8048

WATTS 892

AMPS

3.4

4.1

3.4

906

4.1

3.5

916

4.1

3.7

972

4.4

3.7

982

4.4

3.7

994

4.4

4.1

1093

4.9

4.10

1093

4.90

4.1

1093

4.9

4.4

1182

5.3

4.4

1180

5.3

4.4

1184 1289 1289 1294

5.3

4.8

5.8

4.8

5.8

4.8

5.8

SHR

0.49

0.67

0.9

0.5

0.7

0.92

0.51

0.72

0.92

0.52

0.76

0.93

0.54

0.81

0.92

BTUh 21168 20358 18846 20160 19008 17532 19368 18000 15930 18144 16110 14202 16146 13896 12276

WATTS 1536 1560 1577 1673 1690 1711 1882

1882

1882 2034 2033 2038 2219 2219 2228

AMPS 7.7

7.7

7.8

8.3

8.3

8.4

9.3

9.30

9.3

10 10 10 10.9

10.9

11

SHR 0.48

0.65

0.88

0.49

0.68

0.89

0.49

0.70

0.9

0.5

0.74

0.9

0.53

0.79

0.9

BTUh 28224 27144 25128 26880 25344 23376 25824 24000 21240 24192 21480 18936 21528 18528 16368

WATTS 2061 2094 2117 2246 2268 2296 2526

2526

2526 2731 2728 2736 2978 2978 2991

AMPS 9.3

9.3

9.4

10 10 10.1

11.1

11.20

11.3

12.1

12.1

12.1

13.1

13.1

13.2

SHR 0.48

0.65

0.88

0.49

0.68

0.89

0.49

0.70

0.9

0.5

0.74

0.9

0.53

0.79

0.9

* Operation above these listed temperatures may result in lowered performance or unit fatigue.

RATING POINT

ARI 310/380

VHA - Extended Cooling Performance

VHA09

VHA12

VHA18

VHA24

OUTDOOR DRY BULB TEMP. (DEGREES F AT 40% R.H.)

75 85 95

INDOOR WET BULB TEMP. (DEGREES F AT 80 F D.B.)

105 110

72 67 62 72 67 62 72

67

62 72 67 62 72 67 62

BTUh 11172 10745 9947 10640 10032 9253 10222

9500

8408 9576 8503 7496 8522 7334 6479

WATTS 738 750 758 805 813 823 905

905

905 978 977 980 1067 1067 1072

AMPS 3.5

3.5

3.5

3.7

3.8

3.8

4.2

4.20

0.72

4.2

4.5

4.5

4.5

4.9

4.9

4.9

SHR 0.51

0.69

0.93

0.52

0.71

0.95

0.52

0.74

5.00

0.95

0.53

0.78

0.96

0.56

0.83

0.95

BTUh 13877 13346 12355 13216 12461 11493 12697 11800 10443 11894 10561 9310 10585 9110 8048

WATTS 917 932 942 999 1009 1022 1124

1124

1124 1215 1214 1217 1325 1325 1331

AMPS 4.1

4.2

4.2

4.5

4.5

4.5

5 5 5.4

5.4

5.4

5.9

5.9

5.9

SHR 0.49

0.67

0.9

0.5

0.7

0.92

0.51

0.92

0.52

0.76

0.93

0.54

0.81

0.92

BTUh 21168 20358 18846 20160 19008 17532 19368 18000 15930 18144 16110 14202 16146 13896 12276

WATTS 1536 1560 1577 1673 1690 1711 1882

1882

1882 2034 2033 2038 2219 2219 2228

AMPS 7.6

7.7

7.7

8.2

8.2

8.3

9.2

9.20

9.2

9.9

9.9

9.9

10.8

10.8

10.8

SHR 0.48

0.65

0.88

0.49

0.68

0.89

0.49

0.70

11.2

0.9

0.5

0.74

0.9

0.53

0.79

0.9

BTUh 27636 26579 24605 26320 24816 22889 25286 23500 20798 23688 21033 18542 21080 18142 16027

WATTS 2019 2051 2073 2199 2222 2249 2474

2474

2474 2674 2672 2679 2917 2917 2929

AMPS 9.3

9.3

9.4

10 10 10.1

11.1

11.3

12.1

12.1

12.1

13.1

13.1

13.2

SHR 0.48

0.65

0.88

0.49

0.68

0.89

0.49

0.7

0.9

0.5

0.74

0.9

0.53

0.79

0.9

* Operation above these listed temperatures may result in lowered performance or unit fatigue.

RATING POINT

ARI 310/380

9

10

WARNING

ELECTRIC SHOCK HAZARD

Turn off electric power before service or installation. All electrical connnections and wiring

MUST be installed by a qualified electrician and conform to the National Electrical Code and all local codes which have jurisdiction. Failure to do so can result in personal injury and/or death.

NOTICE

ELECTRIC SHOCK HAZARD

Not following the previous WARNING could result in fire or electrically unsafe conditions which could cause moderate or serious property damage. Read, understand and follow the previous warning.

ELECTRICAL REQUIREMENTS

Wire Size

“Use

ONLY time delayed fused disconnect or HACR type circuit breaker as indicated on the unit’s rating plate (see sample on this page). Proper current protection to the unit is the responsibility of the owner”.

Unit

MUST

All 208/230v chassis must be hard wired with properly sized breaker. See nameplate for specific chassis electrical requirements. See figure 9 (Page 12) for unit wiring and wall thermostat wiring. See Electrical Rating Table below for wire siz

Use HACR type breakers to avoid nuisance trips. All field wiring must be done in accordance with NEC and local codes.

Electrical Rating Tables

1

2

3

5 A

0

0

A

A

1 4

1 2

1 0

Supply voltage

Supply voltage to the unit should be a nominal 208/230 volts. It must be between 197 volts and 253 volts. Supply voltage to the unit should be checked WITH THE UNIT IN OPERATION. Voltage readings outside the specified range can be expected to cause operating problems. Their cause MUST be investigated and corrected.

Sample Nameplate

120524

COOLING EQUIPMENT

SAMP

LE

FOLLOWING ITEMS

OUTDOOR GRILLE

INDOOR GRILLE

REmotE tHERmoStat anD Low VoLtagE ContRoL

CONNeCTIONS

RT5 (Two speed fan)

Remote Thermostat

All Friedrich Vert-I-Pak units are factory configured to be controlled by using a 24V single stage remote wall mounted thermostat. The thermostat may be auto or manual changeover as long as the control configuration matches that of the

Vert-I-Pak unit.

Manual Changeover Thermostat

For Heat Pump equipped units: a single stage, heat/cool thermostat with a terminal for a reversing valve operation is required. Terminal “B” should be continuously energized in the heat mode and terminal “G” should be energized whenever there is a call for heating or cooling. (Typically, a single stage, heat/cool thermostat designed for use with electric heat systems will meet the above requirements).

To control the unit with a wall-mounted thermostat:

1) Pull the disconnect switch.

2) Unscrew and remove the control box panel.

3) After selecting which side you want to run your thermostat

wire through, run the wires through the side hole in the box

to reach the connection terminal for the wiring.

4) Make the wire connections, appropriately matching the

wires as shown in the wiring diagram.

5) Once each wire is matched and connected, the unit is now

controlled by the thermostat.

6) Reattach the control box cover.

Cool Off Heat

RT4 (One speed fan)

Auto On

Location

The thermostat should not be mounted where it may be affected by drafts, discharge air from registers (hot or cold), or heat radiated from the sun or appliances.

The thermostat should be located about 5 Ft. above the fl oor in an area of average temperature, with good air circulation. Close proximity to the return air grille is the best choice.

Mercury bulb type thermostats MUST be level to control temperature accurately to the desired set-point. Electronic digital type thermostats SHOULD be level for aesthetics.

Thermostat Location

NOTE: An improperly operating, or poorly located room thermostat can be the source of perceived equipment problems. A careful check of the thermostat and wiring must be made then to insure that it is not the source of problems.

11

12

REmotE tHERmoStat anD Low VoLtagE ContRoL

CONNeCTIONS (Continued)

Thermostat Connections

C = Common Ground

W = Call for Heating

Y = Call for Cooling

R = 24V Power from Unit

GL = Call for Fan (Low Speed)

GH = Call for Fan (High Speed)

B = Reversing Valve Energized in heating mode

*If only one G terminal is present on thermostat, connect to GL for low fan or to GH for high fan operation.

NOTE: It is the installer’s responsibility to ensure that all control wiring connections are made in accordance with the Freidrich installation instructions. Improper connection of the thermostat control wiring and/or tampering with the unit’s internal wiring can void the equipment warranty.

Questions concerning proper connections to the unit should be directed to the factory: 210-357-4400.

Thermostat Configuration

An improperly configured t-stat can be the cause of improper operation. Ensure to correctly configure the t-stat (see owner’s manual).

Desk Control Terminals

The Friedrich VERT-I-PAK has built-in provisions for connection to an external switch to control power to the unit.

The switch can be a central desk control system or even a normally open door switch.

For desk control operation, connect one side of the switch to the D1 terminal and the other to the D2 terminal (See figure 9).

Whenever the switch closes, the unit operation will stop.

Maximum Wire Length for Desk Control Switch

Wire Size Maximum Length

#24

#22

#20

#18

#16

400 ft.

600 ft.

900 ft.

1500 ft.

2000 ft.

Note: The desk control system and switches must be field supplied.

Auxiliary Fan Control

The Smart Center also has the ability to control a 24VAC relay to activate an auxiliary, or transfer, fan. The outputs are listed as F1 and F2 on the control board.

To connect the relay, simply wire one side of the relay to

F1 and the other side to F2. Anytime that the fan runs, the terminals will send a 24VAC signal to the relay. The relay must be 24 VAC, 50mA or less.

Note: The relay and auxiliary fans must be field supplied.

ELECtRonIC ContRoL BoaRD FEatURES

The new Friedrich Vert-I-Pak has state of the art features to improve guest comfort and conserve energy. Through the use of specifically designed control software, Friedrich has accomplished what other Manufacturer’s have only attempted – a quiet, dependable, affordable and easy to use Vert-I-Pak.

Below is a list of standard features on every Friedrich VPAK and their benefit to the owner.

Quiet Start/Stop

Fan Delay

The fan start and stop delays prevent abrupt changes in room acoustics due to the compressor energizing or stopping immediately. Upon call for cooling or heating the unit fan will run for five seconds prior to energizing the compressor. Also, the fan off delay allows for “free cooling” by utilizing the already cool indoor coil to its maximum capacity by running for 30 seconds after the compressor.

Remote Thermostat

Operation

VPAK units are thermostat controlled.

Internal Diagnostic

Program

Service Error Code

Storage

Room Freeze

Protection

Random

Compressor Restart

Digital Defrost

Thermostat

Instant Heat

Heat Pump Mode

Emergency Heat

Override

Desk Control Ready

The new Friedrich digital VPAK features a self diagnostic program that can alert maintenance to component failures or operating problems. The internal diagnostic program saves properties valuable time when diagnosing running problems.

The self diagnosis program will also store error codes in memory if certain conditions occur and correct themselves such as extreme high or low operating conditions or activation of the room freeze protection feature. Storing error codes can help properties determine if the unit faced obscure conditions or if an error occurred and corrected itself.

When the VPAK senses that the indoor room temperature has fallen to 40 °F the unit will cycle on high fan and the electric strip heat to raise the room temperature to 46 °F then cycle off again. This feature works regardless of the mode selected and can be turned off. The control will also store the Room Freeze cycle in the service code memory for retrieval at a later date. This feature ensures that unoccupied rooms do not reach freezing levels where damage can occur to plumbing and fixtures.

Multiple compressors starting at once can often cause electrical overloads and premature unit failure.

The random restart delay eliminates multiple units from starting at once following a power outage or initial power up. The compressor delay will range from 180 to 240 seconds.

The new Friedrich VPAK uses a digital thermostat to accurately monitor the outdoor coil conditions to allow the heat pump to run whenever conditions are correct. Running the VPAK in heat pump mode save energy and reduces operating costs. The digital thermostat allows maximization of heat pump run time.

Heat pump models will automatically run the electric heater during compressor lock-out to quickly provide heat when initially energized, then return to heat pump mode. This ensures that the room is heated quickly without the usual delay associated with heat pump units.

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

All electronic VPAK units have low voltage terminals ready to connect a desk control energy management system. Controlling the unit from a remote location like the front desk can reduce energy usage and requires no additional accessories at the VPAK.

Indoor Coil Frost

Sensor

Auxiliary Fan Ready

The frost sensor protects the compressor from damage in the event that airfl ow is reduced or low outdoor temperatures cause the indoor coil to freeze. When the indoor coil reaches 30 °F the compressor is diabled and the fan continues to operate based on demand. Once the coil temperature returns to 45

°F the compressor returns to operation.

Ultra-Quiet Air

System

The VPAK series units feature a indoor fan system design that reduces sound levels without lowering airflow and preventing proper air circulation.

High Efficiency

The VPAK benefits quality components and extensive development to ensure a quiet, efficient and dependable unit.

Rotary Compressor

High efficiency rotary compressors are used on all Friedrich VPAKs to maximize durability and efficiency.

The VPAK features a 24V AC terminal for connection to an auxiliary fan that may be used to transfer air to adjoining rooms. Auxiliary fans can provide conditioning to multiple rooms.

13

14

Electronic Control Configuration

The adjustable control dip switches are located at the lower left hand portion of the digital Smart Center. The inputs are only visible and accessible with the front cover removed from the Unit.

Factory Dip Switch Configuration

1 2 3 4 5 6 7 8

Dip Switch Setting

Switches 1-4 ON

Switch 5-7 OFF

Switch 8 ON

Room Freeze Protection – Switch 6

Units are shipped from the factory with the room freeze protection disabled. Room Freeze Protection can be switched on at the owner’s preference by moving Dip Switch 6 to ‘ON’. This feature will monitor the indoor room conditions and in the event that the room falls below 40°F the unit will cycle on high fan with the electric heater. This occurs regardless of mode.

Emergency Heat Override – Switch 7

Units are shipped from the factory with the room emergency heat override disabled. In the unlikely event of a compressor failure a heat pump unit may be switched to operate in only the electric heat mode until repairs can be made, by moving Dip

Switch 7 to ‘ON’.

Discharge Air Sensor Override – Switch 8

This switch MUST remain in the “ON” position for Vert-I-Pak models, since they do not use a discharge air sensor. If the switch is positioned in the “OFF” position on these models it will result in the erroneous display Error Code 14 indicating that the Discharge air temperature sensor is open or shorted.

Note: In order for the control to recognize “Dip” switch setting changes, the unit must be disconnected from power supply when making any configuration changes.

Error Code Diagnostics

The VPAK electronic control continuously monitors the Vert-I-Pak unit operation and will store error codes if certain conditions are witnessed. In some cases the unit may take action and shut the unit off until conditions are corrected.

To access the error code menu press the ‘ HEAT’ and ‘HIGH

FAN’ buttons simultaneously for three seconds. If error codes are present they will be displayed. If multiple codes exist you can toggle between error codes using the temp up ▲ button. To clear all codes press the temp down ▼ button for three seconds while in the error code mode. To exit without losing codes press the ‘Low Fan’ button.

Button Location for Vert-I-Pak Models

With the remote thermostat escutcheon installed, the button locations to access the diagnostics mode can be located as shown below.

Temp

Temp

Cool

Heat

High fan

Fan only Low fan

Power

* Heat and high fan - access error codes

* Temp up ▲ and temp down ▼ - toggle between error codes

* Low fan - exit error code mode without losing stored error

codes.

* Temp down ▼ - clears all error codes

NOTE: Hold buttons down for three seconds.

ELECtRonIC ContRoL ERRoR CoDES DIagnoStICS anD

TeST MODe (Continued)

The chart below lists the possible error codes and their description:

Error

Code Code Translation

EF “Error Free” - No Codes Stored

02 An extreme low voltage condition exists <198V for 230V units and

<239V for 265V units.

03 Return air thermistor sensor open or short circuit

04

05

06

07

08

09

10

Indoor coil thermistor sensor open or short circuit

Outdoor coil thermistor sensor open or short circuit

If O.D. coil Temperature > 175° F for

2 consecutive minutes. (Heat Pump models only)

I.D coil temperature <30° F for 2 consecutive minutes.

Unit cycles (Heat or Cool demand) >

9 times per hour

Unit cycles (Heat or Cool demand) <

3 times per hour

Room Freeze Protection triggered

Action Taken by Unit

None

Shut down unit. Display Error code and flash. Once voltage rises to normal level system power is restored.

Set return air sensor = 75°F. Alternately flash set point and error code. Leave unit running.

Set ID coil temp = 40°F. Alternately flash set point and error code. Leave unit running.

Set OD coil temp = 20°F. Alternately flash set point and error code. Automatically change over to Electric heat Mode only.

Leave unit running.

Alternately flash set point and error code.

Shut unit down for 5 minutes, then try again

2 times, if fails the 3rd time then shut down unit.

Alternately flash set point and error code. Continue fan operation while the compressor is locked out until the indoor coil thermistor reaches 45° F, then energize the compressor. However, compressor must still wait a lockout time of 180 to 240 seconds.

Store error code in memory.

Keep unit running

Store Error Code in memory.

Keep unit running

Alternately flash set point and error code.

Keep unit running.

Shut down unit. Display error code and flash.

Turn OFF compressor. Flash error code

Possible Cause

Unit Operating Normally

• Inadequate power supply

• Defective breaker

• Blown fuse

• Defective sensor

• Defective sensor

• Defective sensor

• Dirty coil

• Fan motor failure

• Restricted air flow

• Non-condensables in refrigeration system

• Dirty filters

• Dirty coil

• Fan motor failure

• Restricted airflow

• Improper refrigerant charge

• Restriction in refrigerant circuit

• Unit oversized

• Low load conditions

• Unit undersized

• High load conditions

• Room temperature fell below 40°F

11 No Signal to “GL or “GH” terminal

13

VPAK

24K BTUs

ONLY

High Pressure switch open

• Defective remote thermostat

• Defective thermostat wiring

• Dirty coil

• Fan motor failure

• Restricted air flow

• Non-condensables in refrigeration system

Diagnostics

The Friedrich Smart Center continuously monitors the VPAK unit operation and will store service codes if certain conditions are witnessed. In some cases the unit may take action and shut the unit off until conditions are corrected. To access the error code menu press the ‘Heat’ and ‘High Fan’ buttons simultaneously for three seconds. If error codes are present they will be displayed. If multiple codes exist you can toggle between messages using the temp up button. To clear all codes press the temp down button for three seconds while in the error code mode. To exit without changing codes press the ‘Low Fan’ button.

test mode

For service and diagnostic use only, the built-in timers and delays on the VPAK may be bypassed by pressing the ‘Cool’ and

‘Low Fan’ buttons simultaneously for three seconds while in any mode to enter the test mode. CE will be displayed when entering test mode, and oE will be displayed when exiting. The test mode will automatically be exited 30 minutes after entering it or by pressing the ‘Cool’ and ‘Low Fan’ buttons simultaneously for three seconds.

Note: To access the Test Mode while under remote wall thermostat operation, remove thermostat’s wires at the terminal block on the electronic control board then connect a jumper wire between GL and GH.

15

VPak ELECtRonIC ContRoL BoaRD anD waLL tHERmoStat SEqUEnCE oF oPERatIon

Wall Thermostat Connections:

• The control is compatible with a standard single stage heat and cool Wall

Thermostat.

• It is compatible with Friedrich

RT4 and RT5 Wall thermostats.

• Terminals are:

C – Common ground terminal.

W – call for heating.

Y – call for cooling,

R – 24V power from Electronic control to Wall Thermostat.

GL - call for low Fan.

GH- call for high fan

B – call for heat pump reversing valve.

The outputs of a single stage Heat and Cool Wall thermostat:

• When a call for

cool from Wall thermostat the signals will go to

terminal

Y, GL or GH.

• When a call for

heat from Wall thermostat the signals will go to

terminal

W, B, GL or GH.

• When a call for Fan Only from Wall thermostat the signals will go to terminal

GL or GH.

Remote T-stat Operation Features:

All buttons on the electronic control board will be disabled except “Heat” and “High Fan” buttons during Error code mode operation.

COMMON CONTROL FEATURES FOR COOL WITH ELECTRIC HEAT

AND HEAT PUMP WITH ELECTRIC HEAT UNITS:

Power On and Off Features on the Electronic Control:

When power is applied to L1 and L2, the Power LED will be lit on the electronic control.

Temperature set:

This feature will depend on Wall Thermostat.

˚F/˚C set:

This feature will depend on Wall Thermostat.

Fan speed, fan cycle on/off or continuous operation

This feature will depend on Wall Thermostat. For single speed Wall

Thermostat, user needs to choose between

GH terminal (High Fan) or

GL terminal (Low Fan). For a two speed fan Wall Thermostat, connect

both

GL and GH. If the PCB receives signals for both GL and GH at the

same time, only

High Fan turns on.

16

VPak ELECtRonIC ContRoL BoaRD anD waLL tHERmoStat SEqUEnCE oF oPERatIon (Continued)

CooL moDE ContRoL FEatURES FoR CooL wItH ELECtRIC HEat UnItS

Reversing valve:

Always

de-energized when “Cool” switch is selected on thermostat.

Compressor operation:

If ambient indoor temperature is above set point temperature depending on t-stat differential and the compressor is not time delayed, turn on compressor. If ambient indoor temperature is below set point depending on t-stat differential, turn off the compressor.

Compressor time delay:

The

time delay feature is de-energized for a period of time that varies randomly from 180 to

240 seconds. Compressor time delay is initiated every time the compressor is

“off” due to:

(1) Satisfying the temperature set point,

(2) Changing mode to fan only

(3 )Turning the unit off.

(4) Control is first energized or when power is restored after failure

Note: Time delay is disabled during Test Mode.

Indoor coil frost protection (Error Code 07):

While in cool mode: If the indoor coil frost protection sensor reads

30°F for 2 minutes continu-

ously,

turn off the compressor, but continue fan operation. While the compressor is out and the

fan is running: when the indoor coil frost protection sensor reaches

45°F, turn on the compres-

sor. However, the compressor must still wait a standard time of

180 to 240 seconds. While 07

flash, heat operation is disabled.

Fan delay:

This is only for

fan ‘cycle’ mode and not for fan ‘continuous’ mode. When unit cycles cool-

ing ON – start the fan 5 seconds EARLY. When unit cycles cooling OFF – DELAY the fan off

for 30 seconds. Note: the fan delay is disabled during

Test Mode.

ELECtRIC HEat moDE ContRoL FEatURES FoR CooL wItH ELECtRIC

HEat UnItS

Reversing valve: Always de-energized when “Heat” button is pushed.

Compressor operation: Compressor does not operate in this mode.

Electric heat operation: If temp is below set point, depending on t-stat differential, turn on

electric heat. If Ambient is above set point depending on t-stat differential, turn off the electric heat.

Fan delay: This is only for fan ‘cycle’ mode and not for fan ‘continuous’ mode. When unit

cycles heating

ON – start the fan 5 seconds EARLY. When unit cycles heating OFF – DELAY

the fan off for

15 seconds. Note: the fan delay is disabled during Test Mode.

17

18

VPak ELECtRonIC ContRoL BoaRD anD waLL tHERmoStat SEqUEnCE oF oPERatIon (Continued)

HEat PUmP moDE ContRoL FEatURES FoR HEat PUmP wItH ELECtRIC

HEat UnItS

Reversing valve:

Always

energized when “Heat” is selected on thermostat.

Compressor operation depends on t-stat settings:

If ambient indoor temperature is below the set point temperature depending on t-stat differential and the compressor is not time delayed, turn on compressor. If ambient indoor temperature is below set point depending on t-stat differential, turn off the compressor.

Compressor Time Delay:

The time delay feature is de-energized for a period of time that varies

randomly from 180 to 240

seconds. Compressor time delay is initiated every time the compressor is “off” due to:

(1) Satisfying the temperature set point,

(2) Changing mode to fan only

(3 )Turning the unit off.

(4) When control is first energized or when power is restored after failure

Note: Time delay is disabled during

Test Mode.

Heat:

When there is a call for heat from the Wall thermostat the

PCB will receive signals on terminal

W, B, GL or GH. During compressor time delay, electric heat will turn on first. When com-

pressor time delay is

UP, the compressor will turn on.

Condition:

If outdoor coil temperature sensor

drops to 30°F for less than 2 consecutive minutes, then unit

will switch to electric heat. Thereafter, unit will switch back to Heat Pump heat if outdoor coil

temperature sensor rises to

45°F or greater.

Fan delay:

This is only for

fan ‘cycle’ mode and not for fan ‘continuous’ mode. When unit cycles cool-

ing ON – start the fan 5 seconds EARLY. When unit cycles cooling OFF – DELAY the fan off

for 30 seconds. Note: the fan delay is disabled during

Test Mode.

Emergency Heat:

When compressor fails in heating season, allows user to disable Heat Pump. Heating with electric heat only (See DIP switch position 7).

ComPonEnt DESCRIPtIon / a-SERIES SPECIFICatIonS

VERT-I-PAK SINGLE PACKAGED VERTICAL AIR CONDITIONERS

9,000 / 12,000 / 18,000 / 24 K BTUs/h

All units are factory assembled, piped, wired and fully charged with R-22. Units are ETL listed and carry an ETL label. Units are approved for 0” clearance. All units are factory run-tested to check operation.

The 9,12 and 18 K BTUs units are 23 1/8” wide x 23 1/8” deep x 32 1/4” high. The 24 K BTUs unit is 23 1/8“ wide by 23

1/8” deep x 47 1/4“ high. Units draw in ambient air through upper portion of an outside architectural louver measuring

25 9/16” wide x 31 1/16” high and shall exhaust heated air out through the lower portion of the louver. The unit is to be inserted to the architectural louver by means of a two part, weather-resistant wall plenum. The unit is capable of left, right or straight-in installations into mechanical closet without field modifications.

REFRIGERATION SYSTEM –

The refrigeration system consists of a hermetically sealed rotary compressor that is externally mounted on vibration isolators; condenser and evaporator coils constructed of copper tubes and aluminum plate fins; and capillaries as expansion devices. The coils are of draw-through design to facilitate cleaning. Unit has a fan slinger ring to increase efficiency and condensate disposal and have a primary condensate removal system consisting of ¾” FPT drain connections built into the unit for easy removal. A secondary condensate removal system is also available for back up and shall overflow through the wall plenum and to the outside of the building.

INDOOR BLOWER / OUTDOOR FAN –

The current Vert-I-Pak 9, 12, & 18 use a dual shaft, permanent split capacitor, dual speed motor to drive indoor blower and outdoor fan. The Vert-I-Pak 24 uses an individual, single shaft, permanent split capacitor, dual speed motor for the indoor blower and a separate single speed motor drives the outdoor fan.

Different size (HP) motors and/or different diameter blower wheels are used in different models to obtain the required airflow.

CONTROLS – Are electronic and factory equipped with terminal strip for connection to a standard 24-volt single-stage heat/cool thermostat. A 24 volt transformer is included. The unit is to be hard-wired. It has a quick-disconnect to disable power for control box service.

GENERAL CONSTRUCTION – The unit is constructed of 18 gauge G90 zinc-coated steel. It is insulated for thermal efficiency. The wall plenum (required factory accessory) is constructed of 20 gauge G90 zinc-coated steel; pre-treated with zinc-phosphate and sealed with a chromate rinse, then powder coated for maximum coverage and protection. The architectural louver (required factory accessory) is fabricated from extruded anodized aluminum with louvers in the horizontal plane.

The unit includes two vibration isolators mounted under the chassis and a non-rigid plenum-to-chassis connection to isolate vibrations to the building.

The unit has a plastic fan, fan shroud and drain pan for corrosion protection and to help prevent rust on the side of the building below the outdoor louver.

The unit is shipped with return air filter brackets and a 14" x 20" filter affixed directly on to the unit chassis. Other optional factory accessories are available for mounting the return air filter in the mechanical closet door or an access panel.

Optional return air grilles shall be available as factory accessories for installation in the wall or door of the mechanical closet.

19

20

External Static Pressure

External Static Pressure can best be defi ned as the pressure difference (drop) between the Positive Pressure (discharge) and the Negative Pressure (intake) sides of the blower.

External Static Pressure is developed by the blower as a result of resistance to airfl ow (Friction) in the air distribution system EXTERNAL to the VERT-I-PAK cabinet.

Resistance applied externally to the VERT-I-PAK (i.e. duct work, coils, fi lters, etc.) on either the supply or return side of the system causes an INCREASE in External Static

Pressure accompanied by a REDUCTION in airfl ow.

External Static Pressure is affected by two (2) factors.

1. Resistance to Airfl ow as already explained.

2. Blower Speed. Changing to a higher or lower blower speed will raise or lower the External Static Pressure accordingly.

These affects must be understood and taken into consideration when checking External Static Pressure/Airfl ow to insure that the system is operating within design conditions.

Operating a system with insuffi cient or excessive airfl ow can cause a variety of different operating problems.

Among these are reduced capacity, freezing evaporator coils, premature compressor and/or heating component failures. etc.

System airfl ow should always be verifi ed upon completion of a new installation, or before a change-out, compressor replacement, or in the case of heat strip failure to insure that the failure was not caused by improper airfl ow.

7. Recheck the external static pressure with the new speed. External static pressure (and actual airfl ow) will have changed to a higher or lower value depending upon speed selected. Recheck the actual airfl ow (at this "new" static pressure) to confi rm speed selection.

8. Repeat steps 8 and 9 (if necessary) until proper airfl ow has been obtained.

EXAMPLE: Airfl ow requirements are calculated as follows:

(Having a wet coil creates additional resistance to airfl ow.

This addit ional resistance must be taken into consideration to obtain accurate airfl ow information.

1 ½ TON SYSTEM ( 18,000 Btu)

Operating on high speed @ 230 volts with dry coil measured external static pressure .20

Air Flow = 500 CFM

In the same SYSTEM used in the previous example but having a WET coil you must use a correction factor of

.94 (i.e. 500 x .94=470 CFM) to allow for the resistance

(internal) of the condensate on the coil.

It is important to use the proper procedure to check external

Static Pressure and determine actual airfl ow. Since in the case of the VERT-I-PAK, the condensate will cause a reduction in measured External Static Pressure for the given airfl ow.

It is also important to remember that when dealing with

VERT-l-PAK units that the measured External Static

Pressure increases as the resistance is added externally to the cabinet. Example: duct work, fi lters, grilles.

Checking External Static Pressure

The airflow through the unit can be determined by measuring the external static pressure of the system, and consulting the blower performance data for the specifi c

VERT-I-PAK.

1. Set up to measure external static pressure at the supply and return air.

2. Ensure the coil and fi lter are clean, and that all the registers are open.

3. Determine the external static pressure with the blower operating.

4. Refer to the Air Flow Data for your VERT-I-PAK system to fi nd the actual airfl ow for factory-selected fan speeds.

5. If the actual airfl ow is either too high or too low, the blower speed will need to be changed to appropriate setting or the ductwork will need to be reassessed and corrections made as required.

6. Select a speed, which most closely provides the required airfl ow for the system.

Checking Approximate Airfl ow

If an inclined manometer or Magnehelic gauge is not available to check the External Static Pressure, or the blower performance data is unavailable for your unit, approximate air fl ow call be calculated by measuring the temperature rise, then using tile following criteria.

KILOWATTS x 3413

Temp Rise x 1.08

= CFM

Electric Heat Strips

The approximate CFM actually being delivered can be calculated by using the following formula:

DO NOT simply use the Kilowatt Rating of the heater (i.e.

2.5, 3.4, 5.0) as this will result in a less-than-correct airfl ow calculation. Kilowatts may be calculated by multiplying the measured voltage to the unit (heater) times the measured current draw of all heaters (ONLY) in operation

to obtain watts. Kilowatts are than obtained by dividing by 1000.

EXAMPLE: Measured voltage to unit (heaters) is 230 volts.

Measured Current Draw of strip heaters is 11.0 amps.

230 x 11.0 = 2530

2530/1000 = 2.53 Kilowatts

2.53 x 3413 = 8635

Supply Air

Return Air

Temperature Rise

20 x 1.08 = 21.6

8635

21.6

= 400 CFM

95

°

F

75

°

F

20

°

Indoor Airflow Data

The Vert-I-Pak A series units must be installed with a free return air configuration. The table below lists the indoor airflow at corresponding static pressures. All units are rarted at low speed.

The Vert-I-Pak units are designed for either single speed or two fan speed operation. For single speed operation refer to the airflow table below and select the most appropriate CFM based on the ESP level. Connect the fan output from the thermostat to the unit on either the GL terminal for low speed or to the GH terminal for high speed operation.

For thermostats with two-speed fan outputs connect the low speed output to the unit GL terminal and the high speed output to the GH terminal.

Ductwork Preparation

Duct ESP:

To determine your system's indoor external static pressure

(ESP, in inches of water) use a duct calculator (as provided by your duct supplier). Include all flex duct transitions and discharge grille(s). If flex duct is used, be sure all the slack is pulled out of the flex duct. Flex duct ESP can increase considerably when not fully extended. DO NOT EXCEED a total of .30 ESP, as this is the MAXIMUM design limit for the

VERT-I-PAK A-Series unit.

Ductwork Preparation

Pull the fl ex duct tight. Extra fl ex duct slack can greatly increase static pressure

IMPORTANT: FLEX DUCT CAN COLLAPSE AND

CAUSE AIRFLOW RESTRICTIONS. DO NOT

USE FLEX DUCT FOR: 90 DEGREE BENDS, OR

UNSUPPORTED RUNS OF 5 FT. OR MORE.

Determining the Indoor CFM: Chart A – CFM

ESP (")

.00"

.10"

.20"

.30”

VEA09/VHA09

Low

340

300

230

140

High

385

340

280

190

VEA12/VHA12

Low

420

350 *

290

250

Model

High

470

420 **

350

300

VEA18/VHA18

Low

430

400

340

290

Highlighted values indicate rated performance point.

Rated performance for

* VEA12

Rated Performance for

** VHA12

High

480

450

400

330

ESP (")

.00"

.10"

.20"

.30"

.40"

Model

VEA24/VHA24

Low

690

610

560

510

450

High

740

700

640

580

520

Highlighted values indicate rated performance point.

Correct CFM (if needed):

Chart B – Correction Multipli ers

Explanation of charts

Chart A is the nominal dry coil VERT-I-PAK CFMs. Chart

B is the correction factors beyond nominal conditions.

Fresh Air Door

The Fresh Air Door is an “intake” system. The fresh air door opened via a slide on the front of the chassis located just above the indoor coil. Move the slide left to open and right to close the fresh air door. The system is capable of up to 60

CFM of fresh air @ ~.3” H20 internal static pressure.

21

22

ComPonEntS tEStIng

BLOWER / FAN MOTOR

A single phase permanent split capacitor motor is used to drive the evaporator blower and condenser fan. A self-resetting overload is located inside the motor to protect against high temperature and high amperage conditions.

WARNING

ELECTRIC SHOCK HAZARD

Disconnect power to the unit before servicing. Failure to follow this warning could result in serious injury or death.

BLOWER / FAN MOTOR TEST

1. Do a visual inspection of motor’s wiring, housing etc.

Determine that the capacitor is serviceable.

2. Make sure the motor has cooled down.

3. Disconnect the fan motor wires from the control board.

4. Test for continuity between the windings also, test to

ground.

5. If any winding is open or grounded replace the motor.

6. A “live” test can also be performed by using a live test

probe (see appropriate wiring schematic).

Fan Motor

Capacitor Check with Capacitor analyzer

The capacitor analyzer will show whether the capacitor is “open” or “shorted.” It will tell whether the capacitor is within its micro farads rating and it will show whether the capacitor is operating at the proper power-factor percentage. The instrument will automatically discharge the capacitor when the test switch is released.

Capacitor Connections

The starting winding of a motor can be damaged by a shorted and grounded running capacitor. This damage usually can be avoided by proper connection of the running capacitor terminals.

From the supply line on a typical 230 volt circuit, a 115 volt potential exists from the “R” terminal to ground through a possible short in the capacitor. However, from the “S” or start terminal, a much higher potential, possibly as high as 400 volts, exists because of the counter EMF generated in the start winding. Therefore, the possibility of capacitor failure is much greater when the identified terminal is connected to the “S” or start terminal. The identified terminal should always be connected to the supply line, or “R” terminal, never to the “S” terminal.

When connected properly, a shorted or grounded running capacitor will result in a direct short to ground from the “R” terminal and will blow the line fuse. The motor protector will protect the main winding from excessive temperature.

Dual Rated Run Capacitor Hook-up

CAPACITORS

WARNING

ELECTRIC SHOCK HAZARD

Turn off electric power before servicing.

Discharge capacitor with a 20,000 Ohm 2 Watt resistor before handling.

Failure to do so may result in personal injury, or death.

Many motor capacitors are internally fused. Shorting the terminals will blow the fuse, ruining the capacitor. A 20,000 ohm 2 watt resistor can be used to discharge capacitors safely. Remove wires from capacitor and place resistor across terminals. When checking a dual capacitor with a capacitor analyzer or ohmmeter, both sides must be tested.

ComPonEntS tEStIng (Continued)

HEATER ELEMENTS AND LIMIT SWITCHES’

SPECIFICATIONS

All heat pumps and electric heat models are equipped with a heating element and a limit switch (bimetal thermostat). The limit is in series with the element and will interrupt the power at a designed temperature.

Should the blower motor fail, filter become clogged or airflow be restricted etc., the high limit switch will open and interrupt the power to the heater before reaching an unsafe temperature condition.

VPAK 9K, 12K and 18K BTUs Models:

2.5 KW, 230 V, Resistance 18.61 Ohms + - 5%.

Has 1 Limit Switch, Opens at 120° F, Closes at 90° F,

It has a One Time Open Temp. of

145° F.

3.4 KW, 230 V, Resistance 13.68 Ohms + - 5%.

Has 1 Limit Switch, Opens at 120° F, Closes at 90° F,

It has a One Time Open Temp. of

145° F.

5 KW, 230 V, Resistance 9.31 Ohms + - 5%.

Has 1 Limit Switch, Opens at 130° F, Closes at 100° F,

It has a One Time Open Temp. of

155° F.

VPAK 24K BTUs Models:

2.5 KW, 230 V, Resistance 18.61 Ohms + - 5%.

Has 2 Limit Switches, Primary Opens at

155° F,

Closes at 125° F, Secondary’s Open Temp. is 200° F.

3.4 KW, 230 V, Resistance 13.68 Ohms + - 5%.

Has 2 Limit Switches, Primary Opens at

155° F,

Closes at 125° F, Secondary’s Open Temp. is 200° F.

5 KW, 230 V, Resistance 9.31 Ohms + - 5%.

Has 2 Limit Switches, Primary Opens at

155° F,

Closes at 125° F, Secondary’s Open Temp. is 200° F.

7.5 KW, 230 V (composed of 2, 3.7 KW Elements)

Each Has a Resistance of

12.41 Ohms + - 5%.

Each Has 2 Limit Switches, Primary Opens at

165° F,

Closes at 135° F With a 1 time Open Temp. of 210° F.

Secondary Limit’s Open Temp. is

200° F.

10 KW, 230 V (composed of 2, 5 KW Elements)

Each Has a Resistance of

9.31 Ohms + - 5%.

Each Has 2 Limit Switches, Primary Opens at

165° F,

Closes at 135° F With a 1 time Open Temp. of 210° F.

Secondary Limit’s Open Temp. is

200° F.

NOTE: Always replace with an exact replacement.

TESTING THE HEATING ELEMENTS AND

LIMIT SWITCHES

WARNING

ELECTRIC SHOCK HAZARD

Disconnect power to the unit before servicing. Failure to follow this warning could result in serious injury or death.

Testing of the heating elements can be made with an ohmmeter or continuity tester across the terminals after the power wires have been removed. Test the limit switch for continuity across its input and output terminals.Test below the limit switch’s reset temperature.

DRAIN PAN VALVE

During the cooling mode of operation, condensate which collects in the drain pan is picked up by the condenser fan blade and sprayed onto the condenser coil. This assists in cooling the refrigerant plus evaporating the water.

During the heating mode of operation, it is necessary that water be removed to prevent it from freezing during cold outside temperatures. This could cause the condenser fan blade to freeze in the accumulated water and prevent it from turning.

To provide a means of draining this water, a bellows type drain valve is installed over a drain opening in the base pan.

This valve is temperature sensitive and will open when the outside temperature reaches 40°F. The valve will close gradually as the temperature rises above 40°F to fully close at 60°F.

Bellows Assembly

Drain Pan Valve

23

24

REFRIgERatIon SEqUEnCE oF oPERatIon

A good understanding of the basic operation of the refrigeration system is essential for the service technician.

Without this understanding, accurate troubleshooting of refrigeration system problems will be more difficult and time consuming, if not (in some cases) entirely impossible. The refrigeration system uses four basic principles (laws) in its operation they are as follows:

1. “Heat always flows from a warmer body to a cooler body.”

2. “Heat must be added to or removed from a substance before a change in state can occur”

3. “Flow is always from a higher pressure area to a lower pressure area.”

4. “The temperature at which a liquid or gas changes state

is dependent upon the pressure.”

The refrigeration cycle begins at the compressor. Starting the compressor creates a low pressure in the suction line which draws refrigerant gas (vapor) into the compressor.

The compressor then “compresses” this refrigerant, raising its pressure and its (heat intensity) temperature.

The refrigerant leaves the compressor through the discharge

Line as a hot High pressure gas (vapor). The refrigerant enters the condenser coil where it gives up some of its heat. The condenser fan moving air across the coil’s finned surface facilitates the transfer of heat from the refrigerant to the relatively cooler outdoor air.

When a sufficient quantity of heat has been removed from the refrigerant gas (vapor), the refrigerant will “condense”

(i.e. change to a liquid). Once the refrigerant has been condensed (changed) to a liquid it is cooled even further by the air that continues to flow across the condenser coil.

The VPAK design determines at exactly what point (in the condenser) the change of state (i.e. gas to a liquid) takes place. In all cases, however, the refrigerant must be totally condensed (changed) to a Liquid before leaving the condenser coil.

The refrigerant leaves the condenser Coil through the liquid line as a warm high pressure liquid. It next will pass through the refrigerant drier (if so equipped). It is the function of the drier to trap any moisture present in the system, contaminants, and large particulate matter.

The liquid refrigerant next enters the metering device. The metering device is a capillary tube. The purpose of the metering device is to “meter” (i.e. control or measure) the quantity of refrigerant entering the evaporator coil.

In the case of the capillary tube this is accomplished (by design) through size (and length) of device, and the pressure difference present across the device.

Since the evaporator coil is under a lower pressure (due to the suction created by the compressor) than the liquid line, the liquid refrigerant leaves the metering device entering the evaporator coil. As it enters the evaporator coil, the larger area and lower pressure allows the refrigerant to expand and lower its temperature (heat intensity). This expansion is often referred to as “boiling”. Since the unit’s blower is moving indoor air across the finned surface of the evaporator coil, the expanding refrigerant absorbs some of that heat. This results in a lowering of the indoor air temperature, hence the

“cooling” effect.

The expansion and absorbing of heat cause the liquid refrigerant to evaporate (i.e. change to a gas). Once the refrigerant has been evaporated (changed to a gas), it is heated even further by the air that continues to flow across the evaporator coil.

The particular system design determines at exactly what point (in the evaporator) the change of state (i.e. liquid to a gas) takes place. In all cases, however, the refrigerant must be totally evaporated (changed) to a gas before leaving the evaporator coil.

The low pressure (suction) created by the compressor causes the refrigerant to leave the evaporator through the suction line as a cool low pressure vapor. The refrigerant then returns to the compressor, where the cycle is repeated.

Refrigeration Assembly

1. Compressor

2. Evaporator Coil Assembly

3. Condenser Coil Assembly

4. Capillary Tube

5. Compressor Overload

SERVICE

WARNING

ELECTRIC SHOCK HAZARD

Turn off electric power before service or installation.

Extreme care must be used, if it becomes necessary to work on equipment with power applied.

Failure to do so could result in serious injury or death.

WARNING

CUT/SEVER HAZARD

Be careful with the sharp edges and corners.

Wear protective clothing and gloves, etc.

Failure to do so could result in serious injury.

Servicing / Chassis Quick Changeouts

.

To Remove the Chassis from the Closet:

A. Switch the wall Thermostat off.

B. Pull the Power Disconnect located in the front of the chassis.

C. Disconnect the power coming into the unit from the main

breaker panel or the closet mounted disconnect.

D. Disconnect the electrical connection.

E. Disconnect the duct work.

F. Slide the chassis out of the wall plenum.

G. Lift the chassis out of the utility closet.

Warranty

25

26

SEaLED REFRIgERatIon SYStEm REPaIRS

IMPORTANT

ANY SEALED SYSTEM REPAIRS TO COOL-ONLY MODELS REQUIRE THE INSTALLATION OF A LIQUID LINE DRIER.

ALSO, ANY SEALED SYSTEM REPAIRS TO HEAT PUMP MODELS REQUIRE THE INSTALLATION OF A SUCTION LINE DRIER.

EQUIPMENT REQUIRED:

1. Voltmeter

2. Ammeter

3. Ohmmeter

4. E.P.A. Approved Refrigerant Recovery System

5. Vacuum Pump (capable of 200 microns or less vacuum.)

6. Acetylene Welder

7. Electronic Halogen Leak Detector (G.E. Type H-6 or equivalent.)

8. Accurate refrigerant charge measuring device such as:

a. Balance Scales - 1/2 oz. accuracy

b. Charging Board - 1/2 oz. accuracy

9. High Pressure Gauge - (0 - 400 lbs.)

10. Low Pressure Gauge - (30 - 150 lbs.)

11. Vacuum Gauge - (0 - 1000 microns)

EQUIPMENT MUST BE CAPABLE OF:

1. Recovery CFC’s as low as 5%.

2. Evacuation from both the high side and low side of the system simultaneously.

3. Introducing refrigerant charge into high side of the system.

4. Accurately weighing the refrigerant charge actually introduced into the system.

5. Facilities for flowing nitrogen through refrigeration tubing during all brazing processes.

WARNING

RISK OF ELECTRIC SHOCK

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

Failure to do so could result in electric shock, serious injury or death.

WARNING

HIGH PRESSURE HAZARD

Sealed Refrigeration System contains refrigerant and oil under high pressure.

Proper safety procedures must be followed, and proper protective clothing must be worn when working with refrigerants.

Failure to follow these procedures could result in serious injury or death.

Refrigerant Charging

Proper refrigerant charge is essential to proper unit operation. Operating a unit with an improper refrigerant charge will result in reduced performance (capacity) and/or efficiency.

Accordingly, the use of proper charging methods during servicing will insure that the unit is functioning as designed and that its compressor will not be damaged.

Too much refrigerant (overcharge) in the system is just as bad

(if not worse) than not enough refrigerant (undercharge). They both can be the source of certain compressor failures if they remain uncorrected for any period of time. Quite often, other problems (such as low air flow across evaporator, etc.) are misdiagnosed as refrigerant charge problems. The refrigerant circuit diagnosis chart will assist you in properly diagnosing these systems.

An overcharged unit will at times return liquid refrigerant

(slugging) back to the suction side of the compressor eventually causing a mechanical failure within the compressor. This mechanical failure can manifest itself as valve failure, bearing failure, and/or other mechanical failure. The specific type of failure will be influenced by the amount of liquid being returned, and the length of time the slugging continues.

Not enough refrigerant (undercharge) on the other hand, will cause the temperature of the suction gas to increase to the point where it does not provide sufficient cooling for the compressor motor. When this occurs, the motor winding temperature will increase causing the motor to overheat and possibly cycle open the compressor overload protector. Continued overheating of the motor windings and/or cycling of the overload will eventually lead to compressor motor or overload failure.

method of Charging / Repairs

The acceptable method for charging the RAC system is the

Weighed in Charge Method. The weighed in charge method is applicable to all units. It is the preferred method to use, as it is the most accurate.

The weighed in method should always be used whenever a charge is removed from a unit such as for a leak repair, compressor replacement, or when there is no refrigerant charge left in the unit. To charge by this method, requires the following steps:

1. Install a piercing valve to remove refrigerant from the sealedsystem. (Piercing valve must be removed from the system before recharging.)

2. Recover Refrigerant in accordance with EPA regulations.

WARNING

BURN HAZARD

Proper safety procedures must be followed, and proper protective clothing must be worn when working with a torch.

Failure to follow these procedures could result in moderate or serious injury.

3. Install a process tube to sealed system.

CAUTION

FREEZE HAZARD

Proper safety procedures must be followed, and proper protective clothing must be worn when working with liquid refrigerant.

Failure to follow these procedures could result in minor to moderate injury.

4. Make necessary repairs to system.

5. Evacuate system to 200 microns or less.

6. Weigh in refrigerant with the property quantity of R-22

refrigerant.

7. Start unit, and verify performance.

WARNING

BURN HAZARD

Proper safety procedures must be followed, and proper protective clothing must be worn when working with a torch.

Failure to follow these procedures could result in moderate or serious injury.

8. Crimp the process tube and solder the end shut.

27

28

WARNING

ELECTRIC SHOCK HAZARD

Turn off electric power before service or installation.

Extreme care must be used, if it becomes necessary to work on equipment with power applied.

Failure to do so could result in serious injury or death.

WARNING

HIGH PRESSURE HAZARD

Sealed Refrigeration System contains refrigerant and oil under high pressure.

Proper safety procedures must be followed, and proper protective clothing must be worn when working with refrigerants.

Failure to follow these procedures could result in serious injury or death.

Undercharged Refrigerant Systems

An undercharged system will result in poor performance

(low pressures, etc.) in both the heating and cooling cycle.

Whenever you service a unit with an undercharge of refrigerant, always suspect a leak. The leak must be repaired before charging the unit.

To check for an undercharged system, turn the unit on, allow the compressor to run long enough to establish working pressures in the system (15 to 20 minutes).

During the cooling cycle you can listen carefully at the exit of the metering device into the evaporator; an intermittent hissing and gurgling sound indicates a low refrigerant charge. Intermittent frosting and thawing of the evaporator is another indication of a low charge, however, frosting and thawing can also be caused by insufficient air over the evaporator.

Checks for an undercharged system can be made at the compressor. If the compressor seems quieter than normal, it is an indication of a low refrigerant charge.

A check of the amperage drawn by the compressor motor should show a lower reading. (Check the Unit

Specification.) After the unit has run 10 to 15 minutes, check the gauge pressures. Gauges connected to system with an undercharge will have low head pressures and substantially low suction pressures.

overcharged Refrigerant Systems

Compressor amps will be near normal or higher.

Noncondensables can also cause these symptoms. To confirm, remove some of the charge, if conditions improve, system may be overcharged. If conditions don’t improve,

Noncondensables are indicated.

Whenever an overcharged system is indicated, always make sure that the problem is not caused by air flow problems. Improper air flow over the evaporator coil may indicate some of the same symptoms as an over charged system.

An overcharge can cause the compressor to fail, since it would be “slugged” with liquid refrigerant.

The charge for any system is critical. When the compressor is noisy, suspect an overcharge, when you are sure that the air quantity over the evaporator coil is correct. Icing of the evaporator will not be encountered because the refrigerant will boil later if at all. Gauges connected to system will usually have higher head pressure (depending upon amount of over charge). Suction pressure should be slightly higher.

Restricted Refrigerant System

Troubleshooting a restricted refrigerant system can be difficult. The following procedures are the more common problems and solutions to these problems. There are two types of refrigerant restrictions: Partial restrictions and complete restrictions.

A partial restriction allows some of the refrigerant to circulate through the system.

With a complete restriction there is no circulation of refrigerant in the system.

Restricted refrigerant systems display the same symptoms as a “low-charge condition.”

When the unit is shut off, the gauges may equalize very slowly.

Gauges connected to a completely restricted system will run in a deep vacuum. When the unit is shut off, the gauges will not equalize at all.

A quick check for either condition begins at the evaporator.

With a partial restriction, there may be gurgling sounds at the metering device entrance to the evaporator. The evaporator in a partial restriction could be partially frosted or have an ice ball close to the entrance of the metering device. Frost may continue on the suction line back to the compressor.

Often a partial restriction of any type can be found by feel, as there is a temperature difference from one side of the restriction to the other.

With a complete restriction, there will be no sound at the metering device entrance. An amperage check of the compressor with a partial restriction may show normal current when compared to the unit specifi cation. With a complete restriction the current drawn may be considerably less than normal, as the compressor is running in a deep vacuum (no load.) Much of the area of the condenser will be relatively cool since most or all of the liquid refrigerant will be stored there.

The following conditions are based primarily on a system in the cooling mode.

29

HERmEtIC ComPonEntS CHECk

WARNING

BURN HAZARD

Proper safety procedures must be followed, and proper protective clothing must be worn when working with a torch.

Failure to follow these procedures could result in moderate or serious injury.

mEtERIng DEVICE

Capillary tube Systems

All units are equipped with capillary tube metering devices.

Checking for restricted capillary tubes.

1. Connect pressure gauges to unit.

2. Start the unit in the cooling mode. If after a few minutes

of operation the pressures are normal, the check valve

and the cooling capillary are not restricted.

WARNING

CUT/SEVER HAZARD

Be careful with the sharp edges and corners.

Wear protective clothing and gloves, etc.

Failure to do so could result in serious injury.

3. Switch the unit to the heating mode and observe the gauge readings after a few minutes running time. If the system pressure is lower than normal, the heating capillary is restricted.

4. If the operating pressures are lower than normal in both

the heating and cooling mode, the cooling capillary is

restricted.

30

CHECk VaLVE

A unique two-way check valve is used on the reverse cycle heat pumps. It is pressure operated and used to direct the flow of refrigerant through a single filter drier and to the proper capillary tube during either the heating or cooling cycle.

One-way Check Valve

(Heat Pump Models)

NOTE: The slide (check) inside the valve is made of teflon.

Should it become necessary to replace the check valve, place a wet cloth around the valve to prevent overheating during the brazing operation.

CHECK VALVE OPERATION

In the cooling mode of operation, high pressure liquid enters the check valve forcing the slide to close the opposite port

(liquid line) to the indoor coil. Refer to refrigerant flow chart.

This directs the refrigerant through the filter drier and cooling capillary tube to the indoor coil.

In the heating mode of operation, high pressure refrigerant enters the check valve from the opposite direction, closing the port (liquid line) to the outdoor coil. The flow path of the refrigerant is then through the filter drier and heating capillary to the outdoor coil.

Failure of the slide in the check valve to seat properly in either mode of operation will cause flooding of the cooling coil. This is due to the refrigerant bypassing the heating or cooling capillary tube and entering the liquid line.

COOLING MODE

In the cooling mode of operation, liquid refrigerant from condenser (liquid line) enters the cooling check valve forcing the heating check valve shut. The liquid refrigerant is directed into the liquid dryer after which the refrigerant is metered through cooling capillary tubes to evaporator.

(Note: liquid refrigerant will also be directed through the heating capillary tubes in a continuous loop during the cooling mode).

HEATING MODE

In the heating mode of operation, liquid refrigerant from the indoor coil enters the heating check valve forcing the cooling check valve shut. The liquid refrigerant is directed into the liquid dryer after which the refrigerant is metered through the heating capillary tubes to outdoor coils. (Note: liquid refrigerant will also be directed through the cooling capillary tubes in a continuous loop during the heating mode).

REVERSIng VaLVE DESCRIPtIon/oPERatIon

WARNING

ELECTRIC SHOCK HAZARD

Disconnect power to the unit before servicing.

Failure to follow this warning could result in serious injury or death.

The Reversing Valve controls the direction of refrigerant flow to the indoor and outdoor coils. It consists of a pressureoperated, main valve and a pilot valve actuated by a solenoid plunger. The solenoid is energized during the heating cycle only. The reversing valves used in the VPAK system is a

2-position, 4-way valve.

The single tube on one side of the main valve body is the high-pressure inlet to the valve from the compressor. The center tube on the opposite side is connected to the low pressure (suction) side of the system. The other two are connected to the indoor and outdoor coils. Small capillary tubes connect each end of the main valve cylinder to the

“A” and “B” ports of the pilot valve. A third capillary is a common return line from these ports to the suction tube on the main valve body. Four-way reversing valves also have a capillary tube from the compressor discharge tube to the pilot valve.

The piston assembly in the main valve can only be shifted by the pressure differential between the high and low sides of the system. The pilot section of the valve opens and closes ports for the small capillary tubes to the main valve to cause it to shift.

NOTE: System operating pressures must be near

normal before valve can shift.

31

32

tEStIng tHE CoIL

WARNING

ELECTRIC SHOCK HAZARD

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

Failure to do so could result in electric shock, serious injury or death.

The solenoid coil is an electromagnetic type coil mounted on the reversing valve and is energized during the operation of the compressor in the heating cycle.

1. Turn off high voltage electrical power to unit.

2. Unplug line voltage lead from reversing valve coil.

3. Check for electrical continuity through the coil. If you do not have continuity replace the coil.

4. Check from each lead of coil to the copper liquid line as it leaves the unit or the ground lug. There should be no continuity between either of the coil leads and ground; if there is, coil is grounded and must be replaced.

5. If coil tests okay, reconnect the electrical leads.

6. Make sure coil has been assembled correctly.

NOTE: Do not start unit with solenoid coil removed from valve, or do not remove coil after unit is in operation. This will cause the coil to burn out.

CHECkIng tHE REVERSIng VaLVE

NOTE: You must have normal operating pressures before the reversing valve can shift.

WARNING

HIGH PRESSURE HAZARD

Sealed Refrigeration System contains refrigerant and oil under high pressure.

Proper safety procedures must be followed, and proper protective clothing must be worn when working with refrigerants.

Failure to follow these procedures could result in serious injury or death.

Check the operation of the valve by starting the system and switching the operation from “Cooling” to “Heating” and then back to “Cooling”. Do not hammer on valve.

Occasionally, the reversing valve may stick in the heating or cooling position or in the mid-position.

When sluggish or stuck in the mid-position, part of the discharge gas from the compressor is directed back to the suction side, resulting in excessively high suction pressure.

Should the valve fail to shift from coooling to heating, block the air flow through the outdoor coil and allow the discharge pressure to build in the system. Then switch the system from heating to cooling.

If the valve is stuck in the heating position, block the air flow through the indoor coil and allow discharge pressure to build in the system. Then switch the system from heating to cooling.

Should the valve fail to shift in either position after increasing the discharge pressure, replace the valve.

Dented or damaged valve body or capillary tubes can prevent the main slide in the valve body from shifting.

If you determing this is the problem, replace the reversing valve.

After all of the previous inspections and checks have been made and determined correct, then perform the

“Touch Test” on the reversing valve.

Reversing Valve in Heating Mode

Reversing Valve in Cooling Mode

touch test in Heating/Cooling Cycle

WARNING

BURN HAZARD

Certain unit components operate at temperatures hot enough to cause burns.

Proper safety procedures must be followed, and proper protective clothing must be worn.

Failure to follow these procedures could result in minor to moderate injury.

The only definite indications that the slide is in the midposition is if all three tubes on the suction side of the valve are hot after a few minutes of running time.

NOTE: A condition other than those illustrated above, and on Page 31, indicate that the reversing valve is not shifting properly. Both tubes shown as hot or cool must be the same corresponding temperature.

Procedure For Changing Reversing Valve

WARNING

HIGH PRESSURE HAZARD

Sealed Refrigeration System contains refrigerant and oil under high pressure.

Proper safety procedures must be followed, and proper protective clothing must be worn when working with refrigerants.

Failure to follow these procedures could result in serious injury or death.

NOTE: When brazing a reversing valve into the system, it is of extreme importance that the temperature of the valve does not exceed 250

°F

at any time.

Wrap the reversing valve with a large rag saturated with water. “Re-wet” the rag and thoroughly cool the valve after each brazing operation of the four joints involved.

The wet rag around the reversing valve will eliminate conduction of heat to the valve body when brazing the line connection.

NOTICE

FIRE HAZARD

The use of a torch requires extreme care and proper judgment. Follow all safety recommended precautions and protect surrounding areas with fire proof materials.

Have a fire extinguisher readily available. Failure to follow this notice could result in moderate to serious property damage.

6. Protect new valve body from heat while brazing with plastic heat sink (Thermo Trap) or wrap valve body with wet rag.

7. Fit all lines into new valve and braze lines into new valve.

WARNING

EXPLOSION HAZARD

The use of nitrogen requires a pressure regulator. Follow all safety procedures and wear protective safety clothing etc.

Failure to follow proper safety procedures could result in serious injury or death.

8. Pressurize sealed system with a combination of R-22 and nitrogen and check for leaks, using a suitable leak detector. Recover refrigerant per EPA guidelines.

9. Once the sealed system is leak free, install solenoid coil

on new valve and charge the sealed system by weighing

in the proper amount and type of refrigerant as shown

on rating plate. Crimp the process tubes and solder the

ends shut. Do not leave Schrader or piercing valves in

the sealed system.

1. Install Process Tubes. Recover refrigerant from sealed

system. PROPER HANDLING OF RECOVERED

REFRIGERANT ACCORDING TO EPA REGULATIONS

IS REQUIRED.

2. Remove solenoid coil from reversing valve. If coil is to

be reused, protect from heat while changing valve.

3. Unbraze all lines from reversing valve.

4. Clean all excess braze from all tubing so that they will

slip into fittings on new valve.

5. Remove solenoid coil from new valve.

33

34

ComPRESSoR CHECkS

WARNING

ELECTRIC SHOCK HAZARD

Turn off electric power before service or installation. Extreme care must be used, if it becomes necessary to work on equipment with power applied.

Failure to do so could result in serious injury or death.

Locked Rotor Voltage (L.R.V.) test

Locked rotor voltage (L.R.V.) is the actual voltage available at the compressor under a stalled condition.

Single Phase Connections

Disconnect power from unit. Using a voltmeter, attach one lead of the meter to the run “R” terminal on the compressor and the other lead to the common “C” terminal of the compressor. Restore power to unit.

Determine L.R.V.

Start the compressor with the volt meter attached; then stop the unit. Attempt to restart the compressor within a couple of seconds and immediately read the voltage on the meter.

The compressor under these conditions will not start and will usually kick out on overload within a few seconds since the pressures in the system will not have had time to equalize.

Voltage should be at or above minimum voltage of 197 VAC, as specified on the rating plate. If less than minimum, check for cause of inadequate power supply; i.e., incorrect wire size, loose electrical connections, etc.

amperage (L.R.a.) test

The running amperage of the compressor is the most important of these readings. A running amperage higher than that indicated in the performance data indicates that a problem exists mechanically or electrically.

Single Phase Running and L.R.A. Test

NOTE: Consult the specification and performance section for running amperage. The L.R.A. can also be found on the rating plate.

Select the proper amperage scale and clamp the meter probe around the wire to the “C” terminal of the compressor.

Turn on the unit and read the running amperage on the meter. If the compressor does not start, the reading will indicate the locked rotor amperage (L.R.A.).

overloads

The compressor is equipped with an external or internal overload which senses both motor amperage and winding temperature. High motor temperature or amperage heats the overload causing it to open, breaking the common circuit within the compressor.

Heat generated within the compressor shell, usually due to recycling of the motor, is slow to dissipate. It may take anywhere from a few minutes to several hours for the overload to reset.

Checking the overload

WARNING

ELECTRIC SHOCK HAZARD

Turn off electric power before service or installation. Extreme care must be used, if it becomes necessary to work on equipment with power applied.

Failure to do so could result in serious injury or death.

WARNING

BURN HAZARD

Certain unit components operate at temperatures hot enough to cause burns.

Proper safety procedures must be followed, and proper protective clothing must be worn.

Failure to follow this warning could result in moderate to serious injury.

External overload VPak 9, 12, 18 k Btus

With power off, remove the leads from compressor terminals. If the compressor is hot, allow the overload to cool before starting check. Using an ohmmeter, test continuity across the terminals of the external overload. If you do not have continuity; this indicates that the overload is open and must be replaced.

Internal overload VPak 24 k Btus

The overload is embedded in the motor windings to sense the winding temperature and/or current draw. The overload is connected in series with the common motor terminal.

1. With no power to unit, remove the leads from the compressor terminals. Allow motor to cool.

2. Using an ohmmeter, test continuity between terminals

C-S and C-R. If no continuity, the compressor overload is open and the compressor must be replaced.

Internal Overload

Single Phase Resistance test

WARNING

ELECTRIC SHOCK HAZARD

Turn off electric power before service or installation. Extreme care must be used, if it becomes necessary to work on equipment with power applied.

Failure to do so could result in serious injury or death.

Remove the leads from the compressor terminals and set the ohmmeter on the lowest scale (R x 1).

Touch the leads of the ohmmeter from terminals common to start (“C” to “S”). Next, touch the leads of the ohmmeter from terminals common to run (“C” to “R”).

Add values “C” to “S” and “C” to “R” together and check resistance from start to run terminals (“S” to “R”).

Resistance “S” to “R” should equal the total of “C” to “S” and “C” to “R.”

In a single phase PSC compressor motor, the highest value will be from the start to the run connections (“S” to

“R”). The next highest resistance is from the start to the common connections (“S” to “C”). The lowest resistance is from the run to common. (“C” to “R”) Before replacing a compressor, check to be sure it is defective.

GROUND TEST

Use an ohmmeter set on its highest scale. Touch one lead to the compressor body (clean point of contact as a good connection is a must) and the other probe in turn to each compressor terminal. If a reading is obtained the compressor is grounded and must be replaced.

Check the complete electrical system to the compressor and compressor internal electrical system, check to be certain that compressor is not out on internal overload.

Complete evaluation of the system must be made whenever you suspect the compressor is defective. If the compressor has been operating for sometime, a careful examination must be made to determine why the compressor failed.

Many compressor failures are caused by the following conditions:

1. Improper air flow over the evaporator.

2. Overcharged refrigerant system causing liquid to be returned to the compressor.

3. Restricted refrigerant system.

4. Lack of lubrication.

5. Liquid refrigerant returning to compressor causing oil to be washed out of bearings.

6. Noncondensables such as air and moisture in

the system. Moisture is extremely destructive to a

refrigerant system.

7. Capacitor test (see page 21).

CHECKING COMPRESSOR EFFICIENCY

The reason for compressor inefficiency is normally due to broken or damaged suction and/or discharge valves, reducing the ability of the compressor to pump refrigerant gas.

This condition can be checked as follows:

1. Install a piercing valve on the suction and discharge or liquid process tube.

2. Attach gauges to the high and low sides of the system.

3. Start the system and run a “cooling or heating performance test.” If test shows:

A. Below normal high side pressure

B. Above normal low side pressure

C. Low temperature difference across coil

The compressor valves are faulty - replace the compressor.

35

36

ComPRESSoR REPLaCEmEnt

Recommended procedure for compressor

replacement

WARNING

RISK OF ELECTRIC SHOCK

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

Failure to do so could result in electric shock, serious injury or death.

1. Be certain to perform all necessary electrical and refrigeration tests to be sure the compressor is actually defective before replacing.

WARNING

HIGH PRESSURE HAZARD

Sealed Refrigeration System contains refrigerant and oil under high pressure.

Proper safety procedures must be followed, and proper protective clothing must be worn when working with refrigerants.

Failure to follow these procedures could result in serious injury or death.

3. After all refrigerant has been recovered, disconnect suction and discharge lines from the compressor and remove compressor. Be certain to have both suction and discharge process tubes open to atmosphere.

4. Carefully pour a small amount of oil from the suction stub of the defective compressor into a clean container.

5. Using an acid test kit (one shot or conventional kit), test the oil for acid content according to the instructions with the kit.

6. If any evidence of a burnout is found, no matter how slight, the system will need to be cleaned up following proper procedures.

7. Install the replacement compressor.

WARNING

EXPLOSION HAZARD

The use of nitrogen requires a pressure regulator. Follow all safety procedures and wear protective safety clothing etc.

Failure to follow proper safety procedures result in serious injury or death.

2. Recover all refrigerant from the system though the process tubes.

PROPER HANDLING OF

RECOVERED REFRIGERANT ACCORDING TO

EPA REGULATIONS IS REQUIRED. Do not use gauge manifold for this purpose if there has been a burnout. You will contaminate your manifold and hoses. Use a Schrader valve adapter and copper tubing for burnout failures.

WARNING

HIGH TEMPERATURES

Extreme care, proper judgment and all safety procedures must be followed when testing, troubleshooting, handling or working around unit while in operation with high temperature components. Wear protective safety aids such as: gloves, clothing etc.

Failure to do so could result in serious burn injury.

NOTICE

FIRE HAZARD

The use of a torch requires extreme care and proper judgment. Follow all safety recommended precautions and protect surrounding areas with fire proof materials.

Have a fire extinguisher readily available. Failure to follow this notice could result in moderate to serious property damage.

8. Pressurize with a combination of R-22 and nitrogen

and leak test all connections with an electronic or

Halide leak detector. Recover refrigerant and repair

any leaks found.

Repeat Step 8 to insure no more leaks are present.

9. Evacuate the system with a good vacuum pump capable of a final vacuum of 300 microns or less. The system should be evacuated through both liquid line and suction line gauge ports. While the unit is being evacuated, seal all openings on the defective compressor. Compressor manufacturers will void warranties on units received not properly sealed. Do not distort the manufacturers tube connections.

CAUTION

FREEZE HAZARD

Proper safety procedures must be followed, and proper protective clothing must be worn when working with liquid refrigerant.

Failure to follow these procedures could result in minor to moderate injury.

10. Recharge the system with the correct amount of

refrigerant. The proper refrigerant charge will be

found on the unit rating plate. The use of an accurate

measuring device, such as a charging cylinder,

electronic scales or similar device is necessary.

SPECIAL PROCEDURE IN THE CASE OF MOTOR

COMPRESSOR BURNOUT

WARNING

ELECTRIC SHOCK HAZARD

Turn off electric power before service or installation.

Failure to do so may result in personal injury, or death.

WARNING

HIGH PRESSURE HAZARD

Sealed Refrigeration System contains refrigerant and oil under high pressure.

Proper safety procedures must be followed, and proper protective clothing must be worn when working with refrigerants.

Failure to follow these procedures could result in serious injury or death.

WARNING

EXPLOSION HAZARD

The use of nitrogen requires a pressure regulator. Follow all safety procedures and wear protective safety clothing etc.

Failure to follow proper safety procedures result in serious injury or death.

1.

2.

3.

4.

Recover all refrigerant and oil from the system.

Remove compressor, capillary tube and filter drier from the system.

Flush evaporator condenser and all connecting tubing with dry nitrogen or equivalent. Use approved flushing agent to remove all contamination from system. Inspect suction and discharge line for carbon deposits. Remove and clean if necessary.

Ensure all acid is neutralized.

Reassemble the system, including new drier strainer and capillary tube.

5.

Proceed with step 8-10 on previous page.

ROTARY COMPRESSOR SPECIAL TROUBLESHOOTING

AND SERVICE

Basically, troubleshooting and servicing rotary compressors is the same as on the reciprocating compressor with only one main exception:

NEVER, under any circumstances, charge a rotary compressor through the LOW side. Doing so would cause permanent damage to the new compressor.

37

38

ROUTINe MAINTeNANCe

WARNING

ELECTRIC SHOCK HAZARD

Turn off electric power before inspections, maintenances, or service.

Extreme care must be used, if it becomes necessary to work on equipment with power applied.

Failure to do so could result in serious injury or death.

NOTICE

Units are to be inspected and serviced by qualified service personnel only. Use proper protection on surrounding property. Failure to follow this notice could result in moderate or serious property damage.

AIR FILTER

Clean the unit air intake filter at least every 300 to 350 hours of operation. Clean the filters with a mild detergent in warm water and allow to dry thoroughly before reinstalling.

COILS AND BASE PAN

WARNING

EXCESSIVE WEIGHT HAZARD

Use two people to lift or carry the unit, and wear proper protective clothing.

Failure to do so may result in personal injury.

NOTICE

Do not use a caustic coil cleaning agent on coils or base pan. Use a biodegradable cleaning agent and degreaser, to prevent damage to the coil and/or base pan.

WARNING

CUT/SEVER HAZARD

Be careful with the sharp edges and corners.

Wear protective clothing and gloves, etc.

Failure to do so could result in serious injury.

The indoor coil (evaporator coil), the outdoor coil (condenser coil) and base pan should be inspected periodically

(yearly or bi-yearly) and cleaned of all debris (lint, dirt, leaves, paper, etc.). Clean the coils and base pan with a soft brush and compressed air or vacuum. If using a pressure washer, be careful not to bend the aluminium fin pack. Use a sweeping up and down motion in the direction of the vertical aluminum fin pack when pressure cleaning coils. Cover all electrical components to protect them from water or spray. Allow the unit to dry thoroughly before reinstalling it in the sleeve.

BLOWER WHEEL / HOUSING / CONDENSER FAN / SHROUD

Inspect the indoor blower housing, evaporator blade, condenser fan blade and condenser shroud periodically (yearly or bi-yearly) and clean of all debris (lint, dirt, mold, fungus, etc.). Clean the blower housing area and blower wheel with an antibacterial / antifungal cleaner. Use a biodegradable cleaning agent and degreaser on condenser fan and condenser shroud. Use warm or cold water when rinsing these items. Allow all items to dry thoroughly before reinstalling them.

ELECTRONIC / ELECTRICAL / MECHANICAL

Periodically (at least yearly or bi-yearly): inspect all control components: electronic, electrical and mechanical, as well as the power supply. Use proper testing instruments (voltmeter, ohmmeter, ammeter, wattmeter, etc.) to perform electrical tests. Use an air conditioning or refrigeration thermometer to check room, outdoor and coil operating temperatures. Use a sling psychrometer to measure wet bulb temperatures indoors and outdoors.

Inspect the surrounding area (inside and outside) to ensure that the unit’s clearances have not been compromised or altered.

RoUtInE maIntEnanCE (Continued)

NOTICE

Do not drill holes in the bottom of the drain pan or the underside of the unit. Not following this notice could result in damage to the unit or condensate water leaking inappropriately which could cause water damage to surrounding property.

SLEEVE / DRAIN

Inspect the sleeve and drain system periodically (at least yearly or bi-yearly) and clean of all obstructions and debris.

Clean both areas with an antibacterial and antifungal cleaner. Rinse both items thoroughly with water and ensure that the drain outlets are operating correctly. Check the sealant around the sleeve and reseal areas as needed.

FRONT COVER

Clean the front cover when needed. Use a mild detergent. Wash and rinse with warm water. Allow it to dry thoroughly before reinstalling it in the chassis.

CONDENSATE DISPOSAL SYSTEM

Part 1: The system’s first stage increases energy efficiency utilizing a factory installed fan that slings the cold condensate onto the hot outdoor coil.

Part 2: When high outdoor humidity prevents slinger from disposing of all the condensate, the excess condensate overflows into the condensate drain pan and out of the

3/4”

internal drain connections.

NOTICE

If Parts 1 and 2 fail for any reason, excess condensate overflows from a spillway directly into the wall plenum to the outside of the building.

IF THIS OCCURS, THIS IS

A WARNING THAT THE CHASSIS OR DRAIN NEED

SERVICING.

39

ELECtRICaL tRoUBLESHootIng CHaRt - CooLIng

9k BtU, 12k BtU, & 18k BtU

Yes

24V at t-stat and control wiring?

Yes

NO COOLING OPERATION

No

Defective t-stat defective control wiring or transformer

Before continuing check for Error

Codes, see electronics control diagnostics and test mode, page 15

Fan runs but

Compressor doesn't

Yes

No

O.K.

Set thermostat to

"Cool," and the Temp.

O.K.

Yes

No

Yes at the Transformer

Primary

Yes

24 Volts at

“R” Terminal on board

Yes

24 Volts present at

Y terminals on t-stat and board?

Yes

208/230 Volts present at #1 relay on board?

Yes

No

No

No

No

Check Supply Circuit’s jumper at transformer. If okay, replace board

Problems indicated with replace board

Problems indicated with

Control Wiring

Replace board

Yes

40

Is Line Voltage present at Motor Leads?

Yes

No

No

Replace Capacitor

Yes

Motor should run

No

Check motor thoroughly

No

Replace Capacitor

Device

No

No

Is Locked Rotor

197 Volts?

Yes so equipped) Start

Assist good?

Yes

No

Yes

See Compressor

Checks

No

Yes

ELECtRICaL tRoUBLESHootIng CHaRt - CooLIng

24k BtU

NO COOLING OPERATION

Compressor and outdoor fan motor run but indoor blower does not run

Yes

24V at t-stat and control wiring?

Before continuing check for Error

Codes, see electronics control diagnostics and test mode, page 15

Indoor blower runs but outdoor fan motor and compressor do not run

Yes

No

O.K.

Set thermostat to

"Cool," move the Temp. lever below the present

Room Temp.

O.K.

Compressor outdoor fan motor and indoor blower should now operate

Yes

See Refrigerant Circuit diagnosis if unit still is not cooling properly

No

Nothing operates, entire system appears dead

Yes

Line voltage present at the Transformer

Primary

Yes

24 Volts at

“R” Terminal on board

No

No

24 Volts present at

Y terminals on t-stat and board?

No

Check Supply Circuit’s jumper at transformer. If okay, replace board

Problems indicated with replace board

Problems indicated with

Room Thermostat or

Control Wiring

Defective t-stat defective control wiring or transformer

208/230 Volts present at #1 relay and “OD” terminal on board?

Yes

208/230 Volts present contactor?

Yes

No

No

Replace board

Check contactor

If defective replace

Yes

Is Line Voltage present at Motor Leads?

Yes

No

Check Capacitor, is

Capacitor Good?

Yes

Motor should run

No

No

Replace Capacitor

Possible motor problem indicated.

Check motor thoroughly

Supply Circuit problems, loose

Connections, or bad

Relays/Board

Replace Capacitor and/or Start Assist

Device

No

No

Is Locked Rotor

Voltage a minimum of

197 Volts?

Yes

Are Capacitor and (if so equipped) Start

Assist good?

Yes

Allow ample time for pressures to equalize No

Have System

Pressures Equalized?

Yes

Possible Compressor problem indicated.

See Compressor

Checks

No

Compressor should run

No

Compressor and outdoor fan motor should now operate

Yes

See Refrigerant

Circuit Diagnosis if unit still is not cooling properly

41

42

ELECtRICaL tRoUBLESHootIng CHaRt

HEat PUmP

HEAT PUMP MODE

SYSTEM COOLS WHEN

HEATING IS DESIRED.

Is Line Voltage

Present at

Solenoid Valve?

YES

NO

Is Selector Switch set for Heat?

Is the Solenoid

Coil Good?

NO

YES

Reversing Valve Stuck

YES

Replace Reversing Valve

Replace Solenoid Coil

tRoUBLESHootIng CHaRt - CooLIng

REFRIGERANT SYSTEM DIAGNOSIS COOLING

PROBLEM

LOW SUCTION PRESSURE

PROBLEM

HIGH SUCTION PRESSURE

PROBLEM

LOW HEAD PRESSURE

PROBLEM

HIGH HEAD PRESSURE

Low Load Conditions

Low Air Flow Across

Indoor Coil

Refrigerant System

Restriction

Undercharged

Moisture in System

High Load Conditions Low Load Conditions High Load Conditions

High Air Flow Across

Indoor Coil

Reversing Valve not

Fully Seated

Refrigerant System

Restriction

Reversing Valve not

Fully Seated

Overcharged

Undercharged System

Defective Compressor Defective Compressor

Low Air Flow Across

Outdoor Coil

Overcharged

Non-Condensables (air)

tRoUBLESHootIng CHaRt - HEatIng

REFRIGERANT SYSTEM DIAGNOSIS HEATING

PROBLEM

LOW SUCTION PRESSURE

PROBLEM

HIGH SUCTION PRESSURE

PROBLEM

LOW HEAD PRESSURE

PROBLEM

HIGH HEAD PRESSURE

Low Air Flow Across

Outdoor Coil

Refrigerant System

Restriction

Outdoor Ambient Too High for Operation in Heating

Reversing Valve not

Fully Seated

Refrigerant System

Restriction

Reversing Valve not

Fully Seated

Undercharged Overcharged Undercharged

Outdoor Ambient Too High

For Operation In Heating

Low Air Flow Across

Indoor Coil

Overcharged

Moisture in System Defective Compressor

Defective Compressor

Non-Condensables (air) in System

43

CooL wItH ELECtRIC HEat

ELECtRICaL & tHERmoStat wIRIng DIagRam

VEa 09/12/18 with 2.5 kw, 3.4 kw or 5kw

ELECtRIC HEat

44

NOTE: THE DIAGRAM ABOVE, ILLUSTRATES THE TYPICAL THERMOSTAT WIRING FOR TWO SPEED

FAN OPERATION. SEE THE UNIT CONTROL PANEL FOR THE ACTUAL UNIT WIRING DIAGRAM

AND SCHEMATIC.

HEat PUmP wItH ELECtRIC HEat

ELECtRICaL & tHERmoStat wIRIng DIagRam

VHa 09/12/18 with 2.5 kw, 3.4 kw or 5kw

ELECtRIC HEat

NOTE: THE DIAGRAM ABOVE, ILLUSTRATES THE TYPICAL THERMOSTAT WIRING FOR TWO SPEED

FAN OPERATION. SEE THE UNIT CONTROL PANEL FOR THE ACTUAL UNIT WIRING DIAGRAM

AND SCHEMATIC.

45

46

CooL wItH ELECtRIC HEat

ELECtRICaL & tHERmoStat wIRIng DIagRam

VEa 24 with 2.5 kw, 3.4 kw or 5kw ELECtRIC HEat

HEat PUmP wItH ELECtRIC HEat

ELECtRICaL & tHERmoStat wIRIng DIagRam

VHa 24 with 2.5 kw, 3.4 kw or 5kw ELECtRIC HEat

47

48

CooL wItH ELECtRIC HEat

ELECtRICaL & tHERmoStat wIRIng DIagRam

VEa 24 with 7.5 kw and 10 kw ELECtRIC HEat

HEat PUmP wItH ELECtRIC HEat

ELECtRICaL & tHERmoStat wIRIng DIagRam

VHa 24 with 7.5 kw and 10kw ELECtRIC HEat

49

50

RESIStanCE VaLUES FoR tHERmIStoRS on

ELECtRonIC ContRoL BoaRD

Outdoor Coil

Return Air

Indoor Coil

ACCeSSORIeS

M O D E L

VPAWP1-8

WALL PLENUM

1 2

3 8

D E S C R I P T I O N

7 8

1 8

5 8

VPAWP1-14

VPAL2

ARCHITECTURAL LOUVER

1 16 9 16

VPSC2

RT4

DIGITAL REMOTE WALL THERMOSTAT

Single stage thermostat, used on VERT-I-PAK units. Hard wired with single speed fan. Direct replacement for RT2.

RT5

VPRG4

DIGITAL REMOTE WALL THERMOSTAT

Single stage thermostat. Features high/low fan speed switch. Thermostat is hard wired and can be battery powered or unit powered.

Features backlit display and multiple configured modes.

ACCESS PANEL / RETURN AIR GRILLE – Serves as an access panel to chassis and interior return air grille. A field-supplied

(25" x 20") filter is mounted inside the hinged access door.

Kit contains hinge bracket for mounting the door with the return air openings high or low on the door for optimal sound attenuation.

For 9,000 / 12,000 / 18,000 Btu models, it is recommended to install the door with the hinge on the right side and the return air openings high on the door. For 24,000 Btu models, it is recommended to install the hinge on the left side with the return air openings low on the door.

DIMENSIONS: 58" high x 29" wide.

COUTOUT DIMENSIONS: 55 3 /

4

" high x 27" wide.

VPDP1

24,000 BTU ONLY

DRAIN PAN

P H O T O

51

52

Friedrich Air Conditioning Company

P.O. Box 1540

San Antonio, TX 78295

210.357.4400 www.friedrich.com

VERT-I-PAK

®

A SERIES

SINGLE PACKAGE VERTICAL AIR CONDITIONERS

LIMITED WARRANTY

SAVE THIS CERTIFICATE. It gives you specific rights. You may also have other rights which may vary from state to state and province to province.

In the event that your unit needs servicing, contact your nearest authorized service center. If you do not know the nearest service center, ask the company that installed your unit or contact us - see address and telephone number above. To obtain service and/or warranty parts replacement, you must notify an authorized FRIEDRICH Air Conditioning Co. service center, distributor, dealer, or contractor of any defect within the applicable warranty period.

When requesting service: please have the model and serial number from your unit readily available.

Unless specified otherwise herein, the following applies:

FRIEDRICH VERT-I-PAK A SERIES VERTICAL AIR CONDITIONERS AND HEAT PUMPS

LIMITED WARRANTY - FIRST YEAR (Twelve (12) months from the date of installation). Any part found to be defective in the material or workmanship will be repaired or replaced free of charge by our authorized service center during the normal working hours; and

LIMITED WARRANTY - SECOND THROUGH FIFTH YEAR (Sixty (60) months from the date of installation). ON THE SEALED

REFRIGERATION SYSTEM. Any part of the sealed refrigeration system that is defective in material or workmanship will be repaired or replaced free of charge (excluding freight charges) by our authorized service center during normal working hours. The sealed refrigeration system consists of the compressor, metering device, evaporator, condenser, reversing valve, check valve, and the interconnecting tubing.

These warranties apply only while the unit remains at the original site and only to units installed inside the continental United

States, Alaska, Hawaii, Puerto Rico and Canada. The warranty applies only if the unit is installed and operated in accordance with the printed instructions and in compliance with applicable local installation and building codes and good trade practices. For international warranty information, contact the Friedrich Air Conditioning Company - International Division.

Any defective part to be replaced must be made available to FRIEDRICH in exchange for the replacement part. Reasonable proof must be presented to establish the date of install, otherwise the beginning date of this certificate will be considered to be our shipment date plus sixty days. Replacement parts can be new or remanufactured. Replacement parts and labor are only warranted for any unused portion of the unit’s warranty.

We will not be responsible for and the user will pay for:

1. Service calls to:

A) Instruct on unit operation. B) Replace house fuses or correct house wiring. C) Clean or replace air filters. D) Remove the unit from its installed location when not accessible for service required. E) Correct improper installations.

2. Parts or labor provided by anyone other than an authorized service center.

3. Damage caused by:

A) Accident, abuse, negligence, misuse, riot, fire, flood, or acts of God. B) Operating the unit where there is a corrosive atmosphere containing chlorine, fluorine, or any damaging chemicals (other than in a normal residential environment). C) Unauthorized alteration or repair of the unit, which in turn affects its stability or performance. D) Failing to provide proper maintenance and service. E) Using an incorrect power source. F) Faulty installation or application of the unit.

We shall not be liable for any incidental, consequential, or special damages or expenses in connection with any use or failure of this unit. We have not made and do not make any representation or warranty of fitness for a particular use or purpose and there is no implied condition of fitness for a particular use or purpose. We make no expressed warranties except as stated in this certificate. No one is authorized to change this certificate or to create for us any other obligation or liability in connection with

this unit. Any implied warranties shall last for one year after the original purchase date. Some states and provinces do not allow limitations on how long an implied warranty or condition lasts, so the above limitations or exclusions may not apply to you. The provisions of this warranty are in addition to and not a modification of or subtraction from the statutory warranties and other rights and remedies provided by law.

Performance of Friedrich’s Warranty obligation is limited to one of the following methods:

1. Repair of the unit

2. A refund to the customer for the prorated value of the unit based upon the remaining warranty period of the unit.

3. Providing a replacement unit of equal value

The method of fulfillment of the warranty obligation is at the sole discretion of Friedrich Air Conditioning.

In case of any questions regarding the provisions of this warranty, the English version will govern.

(10-08)

TECHNICAL SUPPORT

CONTACT INFORMATION

FRIEDRICH AIR CONDITIONING CO.

Post Office Box 1540 · San Antonio, Texas 78295-1540

4200 N. Pan Am Expressway · San Antonio, Texas 78218-5212

(210) 357-4400 · FAX (210) 357-4490 www.friedrich.com

Printed in the U.S.A.

FRIEDRICH AIR CONDITIONING CO.

Post Office Box 1540 · San Antonio, Texas 78295-1540

4200 N. Pan Am Expressway · San Antonio, Texas 78218-5212

(210) 357-4400 · FAX (210) 357-4490 www.friedrich.com

Printed in the U.S.A.

VPK-ServMan (04-09)