51878-1-OP V-500 10-20, V-500 MAX 10-20 (Rev 0, 11-04)

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Copyright 1999 Thermo King Corp., Minneapolis, MN, USA

Printed in USA

V-500 10/20, V-500 MAX 10/20

TK 51878-1-OP (Rev. 0, 11/04)

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Disclaimer

This manual is published for informational purposes only. Thermo King Corporation makes no

representations or warranties, express or implied, with respect to the information, recommendations and

descriptions contained in this manual and such information, recommendations and descriptions should

not be regarded as all-inclusive or covering all contingencies. If you have questions or require further

information, please contact your local Thermo King dealer.

The procedures described herein should be undertaken only by qualified personnel. Failure to implement

these procedures correctly may cause damage to the Thermo King unit or other property or personal

injury.

Thermo King Corporation and its affiliates shall have no liability in contract or tort (including negligence

and/or strict liability) or otherwise, to any person or entity for any personal injury, property damage or any

other direct, indirect, special or consequential damage or liability whatsoever, arising out of or resulting

from any actions by any person that are contrary to this manual or any of the information,

recommendations or descriptions contained herein or the failure of any person to implement the

procedures described herein correctly or to follow caution and safety decals located on the Thermo King

unit.

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Table of ContentsTable of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

List of Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Electrical Hazard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Refrigerant Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10First Aid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

First AidRefrigerant . . . . . . . . . . . . . . . . . . . . . . 11

First AidRefrigerant Oil . . . . . . . . . . . . . . . . . . . 11Safety Decals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Unit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Unit Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Refrigeration System . . . . . . . . . . . . . . . . . . . . . . . . . 15

Evaporator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16The evaporator is mounted on the ceiling inside the truck

box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Control Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

In-Cab Control Box . . . . . . . . . . . . . . . . . . . . . . . . . .

Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Liquid Injection System . . . . . . . . . . . . . . . . . . . . . . .

Evaporator Drain Tube Heaters . . . . . . . . . . . . . . . . . Electric Standby Operation . . . . . . . . . . . . . . . . . . . .

Oil Separator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Protection Features . . . . . . . . . . . . . . . . . . . . . . . . . .

In-Cab Control Box Description . . . . . . . . . . . . . . . Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Display Descriptions . . . . . . . . . . . . . . . . . . . . . .

Operating Instructions . . . . . . . . . . . . . . . . . . . . . .

Cab Control Box Operating Instructions . . . . . . . . . . Displaying Return Air Temperature . . . . . . . . . . . Display Setpoint Temperature . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Enter Setpoint Temperature. . . . . . . . . . . . . . . . .

Defrost Mode Operation . . . . . . . . . . . . . . . . . . . Weekly Pretrip Inspection . . . . . . . . . . . . . . . . . .

Unit Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Thermostat Operation . . . . . . . . . . . . . . . . . . . . . . . .
http://../Module%20Masters/1_Incab%20Control%20Box%20Desc_M13%20only.pdfhttp://../Module%20Masters/1_Incab%20Control%20Box%20Desc_M13%20only.pdfhttp://../Module%20Masters/1_Incab%20Control%20Box%20Desc_M13%20only.pdfhttp://../Module%20Masters/1_Incab%20Control%20Box%20Desc_M13%20only.pdfhttp://../Module%20Masters/1_Incab%20Control%20Box%20Desc_M13%20only.pdfhttp://../Module%20Masters/1_Incab%20Control%20Box%20Desc_M13%20only.pdf

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Table of Contents

4

Loading and Enroute Inspections . . . . . . . . . . . . . . 39

Pre-Loading Inspection . . . . . . . . . . . . . . . . . . . . . . . . 39Inspecting the Load . . . . . . . . . . . . . . . . . . . . . . . . . . . 41Enroute Inspections . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Maintenance Inspection Schedule . . . . . . . . . . . . . . 49

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Serial Number Locations . . . . . . . . . . . . . . . . . . . . . 63

Emergency Cold Line . . . . . . . . . . . . . . . . . . . . . . . . 65

Recover Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . 66

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List of FiguresFigure 1:Fan Warning . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 2:Caution: High Voltage . . . . . . . . . . . . . . . . . . 12Figure 3:Belt Warning . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 4:V-500 Condenser Unit . . . . . . . . . . . . . . . . . 14Figure 5:Evaporator . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Figure 6:In-Cab Control Box . . . . . . . . . . . . . . . . . . . . 16Figure 7:Unit Components (Model 20) . . . . . . . . . . . . 21Figure 8:Condenser Electric and Capacitor Boxes

(Model 20) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Figure 9:Standard Evaporator . . . . . . . . . . . . . . . . . . . 23

Figure 10:Evaporator with Hot Water and Electric HeatOptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Figure 11:M-13 In-Cab Control Box . . . . . . . . . . . . . . 25Figure 12:Display Screen . . . . . . . . . . . . . . . . . . . . . . 26

Figure 13:On/Off Key & LED . . . . . . . . . . . . . . . . . . .

Figure 14:Celsius/Fahrenheit LED . . . . . . . . . . . . . . . Figure 15:Setpoint Key & Dial . . . . . . . . . . . . . . . . . .

Figure 16:Misc. LEDs . . . . . . . . . . . . . . . . . . . . . . . . Figure 17:Defrost Key & LED . . . . . . . . . . . . . . . . . . .

Figure 18:M-13 In-Cab Control Box . . . . . . . . . . . . . . Figure 19:Setpoint Key . . . . . . . . . . . . . . . . . . . . . . . Figure 20:Entering Setpoint . . . . . . . . . . . . . . . . . . . .

Figure 21:On/Off Key and Defrost Key . . . . . . . . . . . Figure 22:Electric Power Receptacle . . . . . . . . . . . . .

Figure 23:Thermostat Algorithm . . . . . . . . . . . . . . . . Figure 24:Loading Considerations . . . . . . . . . . . . . . .

Figure 25:Condenser and Standby Compressor SeriaNumber Locations . . . . . . . . . . . . . . . . . . . . . . . . . . .
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List of Figures

6

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Introduction

8

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Safety PrecautionsThermo King recommends all services be performed by a

Thermo King dealer. However, there are several general safetypractices you should be aware of:

DANGER: Never operate the unit with the discharge

valve closed because it could cause the compressor to

explode, causing death or serious injury.

WARNING: Always wear goggles or safety glasses

when working with or around the refrigeration

system or battery. Refrigerant or battery acid cancause permanent damage if it comes in contact with

your eyes.

WARNING: Keep hands and loose clothing clear of

fans and belts at all times when the unit is operating

or when opening or closing compressor service

valves.

WARNING: Exposed coil fins can cause painful

lacerations. Service work on the evaporator orcondenser coils is best left to a certified Thermo Ki

technician.

CAUTION: Use extreme caution when drilling ho

in the unit. Drilling into electrical wiring or

refrigerant lines could cause a fire. Never drill int

structural components.

WARNING: Turn all unit On/Off switches to the O

position before opening doors or inspecting any pa

of the unit.

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Safety Precautions

10

Electrical Hazard

Refrigerant OilObserve the following precautions when working with or

around refrigerant oil:

RefrigerantAlthough fluorocarbon refrigerants are classified as safe,

observe caution when working with refrigerants or around

areas where they are being used in the servicing of your unit.

WARNING: Disconnect the high voltage power cable

before working on the unit. Units with electric

standby present a potential electrical hazard.

WARNING: Always wear goggles or safety glasses to

protect eyes from refrigerant oil contact.

WARNING: Protect skin and clothing from

prolonged or repeated contact with refrigerant oil.

Rubber gloves are recommended.

WARNING: Wash thoroughly immediately after

handling refrigerant oil to prevent irritation.

DANGER: Fluorocarbon refrigerants may produce

toxic gases. In the presence of an open flame or

electrical short, these gases are severe respiratory

irritants CAPABLE OF CAUSING DEATH.

DANGER: Fluorocarbon refrigerants tend to

displace air and can cause oxygen depletion which

could result in DEATH BY SUFFOCATION. Provide

adequate ventilation in enclosed or confined areas.

WARNING: Fluorocarbon refrigerants evaporate

rapidly, freezing anything they contact if accidentally

released into the atmosphere from the liquid state.

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Safety Precautions

First Aid

First AidRefrigerant

Eyes: For contact with liquid, immediately flush eyes withlarge amounts of water. Seek prompt medical attention.

Skin: Flush areas with large amounts of warm water. Do notapply heat. Wrap burns with dry, sterile, bulky dressing to

protect from infection or injury. Seek prompt medical

attention.

Inhalation: Move victim to fresh air and restore breathing ifnecessary. Stay with victim until emergency personnel arrive.

First AidRefrigerant Oil

Eyes: Immediately flush eyes with large amounts of waterat least 15 minutes while holding the eyelids open. Get prom

medical attention.

Skin: Remove contaminated clothing. Wash thoroughly wi

soap and water. Get medical attention if irritation persists.

Inhalation: Move victim to fresh air and restore breathing

necessary. Stay with victim until emergency personnel arriv

Ingestion: Do not induce vomiting. Immediately contactlocal poison control center or physician.

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Safety Precautions

12

Safety Decals

Figure 1: Fan Warning

Figure 2: Caution: High Voltage

Figure 3: Belt Warning

AMA145

AMA147

AMA146

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Unit Description

IntroductionThe Thermo King V-500 10/20 and V-500 MAX truckrefrigeration systems are two piece units. The unit is designed

for medium-sized trucks and vans carrying fresh produce and

frozen and deep frozen goods.

The condenser is mounted on the front of the truck box or

container. The evaporator is mounted on the cargo

compartment ceiling. The main compressor is powered by the

vehicle engine via a belt. The unit is connected to the

compressor by refrigeration hoses. In electric standby

operation models, the second compressor is driven by an

electric motor.

Control circuits operate on 12 VDC supplied by the truck

batteries for over-the-road operation. The refrigeration system

is protected by a high pressure cutout and a low pressure

cutout.

The in-cab control includes an on/off switch, manual defros

switch, thermometer, thermostat, thermostat adjustments an

indicator lights.

The operating mode is selected automatically: When the uni

connected to an electric power source, engine-driven operat

is automatically blocked. If the vehicle engine is started up

while the power cable is still connected to the electric powe

source, the unit will continue to operate in electric standby

mode. It is not possible to start the engine-driven compress

until the power cable is disconnected from the unit.There are two basic models:

Model 10: Cool and defrost on truck engine driven

compressor operation.

Model 20: Cool and defrost on both truck engine drive

compressor operation and electric standby compressor

operation.

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Unit Description

14

Figure 4: V-500 Condenser Unit

Unit Features M-13 In-Cab Control Box with Digital LED Thermometer

(Standard)

Digital Thermometer Electronic Thermostat (Standard)

Defrost Timer (Standard)

Defrost Thermostat

Hot Gas Defrost (Standard)

Manual Defrost Switch (Standard)

Oil Separator (Standard)

Liquid Injection

Main Compressor TM 16 XD

Electric Compressor, Model 20

Evaporator Drain Heaters, Max Units

Electric/00Water Heat, Model 20

Water Heat, Model 10

AMA508

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Unit Description

Refrigeration SystemRefrigeration hoses or lines are used to connect the condenser,

the evaporator, the compressor and any other components.

Model 20 units have another compressor and an electric motor

mounted in the condenser section for electric standby

operation.

The engine compressor is driven by a belt from the engine. The

electric standby compressor is connected in parallel with the

engine-driven compressor. The standby compressor is

hermetically sealed with its electric motor. Both compressors

use the same refrigeration system circuit. Check valves isolate

one compressor from the other during operation.

Compressor operation is controlled by the thermostat, whichenergizes the compressor clutch during engine operation or

starts the electric motor and energizes the compressor clutch on

electric standby operation. The refrigeration system is

protected by a high pressure cutout switch and a low pressure

cutout switch.

When plugged into standby power, engine operation is

automatically locked out. If the truck engine is turned on wh

the power cord is still plugged into a power receptacle, the u

will remain working in electric mode; the engine driven

compressor cannot be started until the power cord is unplugg

from the unit as the selection of engine operation or standby

operation is automatic.

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Unit Description

16

Figure 5: Evaporator

Evaporator

The evaporator is mounted on the ceiling inside the truck box.

Control CircuitsThe control circuits operate on 12 VDC supplied by the truck

batteries for engine operation. On standby operation, the power

is rectified from an AC transformer.

Figure 6: In-Cab Control Box

In-Cab Control BoxUnit operation is controlled with an in-cab control box, which

is mounted in the truck cab. It includes an On-Off switch,

manual defrost switch, thermometer, thermostat, thermostat

adjustment, and indicator lights.

The TC unit has an additional cab control box to operate the

second compartment. It is switched on and off from the main

cab control box and includes a thermometer, thermostat,

thermostat adjustment and indicator lights.

AMA510

AJA1772

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Unit Description

RefrigerantThe V-500-10 and V-500-20 units use R-134a refrigerant. The

V-500 MAX-10 and V-500 MAX-20 units use R-404A

refrigerant.

Liquid Injection SystemAll V-500 models have a liquid injection system to limit

discharge temperature of the engine driven compressor. If the

discharge gas leaving the compressor reaches a temperature of

230 5 F (110 3 C) the liquid injection switch closes,

providing voltage to the liquid injection solenoid. The solenoid

opens a valve, allowing liquid refrigerant to flow from the

liquid line near the drier inlet to the metering orifice attached to

the suction line fitting on the engine driven compressor. As the

refrigerant passes through the metering orifice it expands and

evaporates, cooling the suction gas entering the compressor.

This cooling effect is transferred to the discharge gas leaving

the compressor from the adjacent cavity in the compressor

head. When the discharge gas is cooled to 200 5 F (93 3 C),

the liquid injection switch opens, the liquid injection solenoid

closes and refrigerant no longer flows through the liquid

injection system.

Evaporator Drain Tube HeatersEvaporator heaters are used in MAX units to avoid drain tu

blockage because of ice accumulation inside the evaporator

One heater is located inside each drain tube. These resistive

wire heaters melt the ice while the unit is in DEFROST mo

Electric Standby OperationDuring electric standby operation, the thermostat controls t

operation of the unit by energizing and de-energizing the

power relay, the electric relays, and the heat contactor. The

thermostat places the unit in cool by energizing the motor

contactor and the electric relays.

The thermostat places the unit in null by de-energizing all t

relays and contactors. The thermostat places the unit in heat

energizing the heat contactor.

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Unit Description

18

When the power relay and the electric relays are energized,

they close contacts that energize the fan relay, the motor

contactor, and the electric standby compressor clutch.

When the heat contactor is energized, it energizes the electric

evaporator heaters and the fan relay.

Oil SeparatorAn oil separator is a standard feature. The oil separator

separates compressor oil from the refrigerant and returns the

oil to the compressor through the suction line. The oil separator

helps provide positive oil return at high compressor speeds and

low operating temperatures. This feature enhances compressor

lubrication and extends compressor life.

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Unit Description

Protection FeaturesHigh Pressure Cutout Switch: The High Pressure CutoutSwitch is a pressure sensitive switch. If the discharge pressure

rises above the switchs opening pressure, the switch stops the

unit. When the discharge pressure falls below the switchs

closing pressure, the switch closes to restart the unit.

Condenser Fan Pressure Switch: This switch helps the

unit to keep the condenser head pressure higher in cool

ambients and on-road. This feature allows better control of the

head pressure and the thermostatic expansion valve, and at the

same time increases the evaporator pressure. Defrost is carried

out quicker in cool ambients and on-road.

Low Pressure Cutout Switch: This switch is a pressure

sensitive switch located in the suction line. If the pressure falls

below acceptable limits, the switch stops unit operation.

U it D i ti

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Unit Description

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Fuses

Fuse 1: Protects the evaporator fan motor (EFM1) from

possible overload.

Fuse 2: Protects the evaporator fan motor (EFM2) frompossible overload.

Fuse 3: Protects:

The engine-driven compressor clutch coil.

Condenser solenoid valve coil (heating option).

Hot gas solenoid valve coil.

Fuse 5: Protects the condenser fan motor (CFM1) from

possible overload.

Fuse 6: Protects the condenser fan motor (CFM2) from

possible overload.

Fuse 7: Protects the evaporator fan motor (EFM3) from

possible overload.

Fuse 4/1: Protects the in-cab control box from possible

overload. It is located inside the in-cab control box.

(Fuses 1, 2, 3 5, 6 and 7 are located on the printed circuit

board.)

Electric Standby Operation Fuses:

Fuse 4 protects the in-cab control box when the unit is in

electric standby mode. Fuse 4 is located on the printed circuitboard (inside the cab control).

Fuse 8 is located in the electric box and protects the

transformer from possible overload.

U it D i ti

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Unit Description

Figure 7: Unit Components (Model 20)

1

6

11

AMA511

2

3

4

57

8

12

9

10

1. Filter-Drier 5. Oil Separator 9. Transformer Cover

2. Liquid Sight Glass 6. Electric Standby Compressor 10. Condenser Fans

3. Liquid Injection Valve 7. Condenser Coil 11. AC Compressor Electric Box

4. Liquid Tank 8. Rectifier Heat Sink 12. Defrost Valve

Unit Description

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Unit Description

22

Figure 8: Condenser Electric and Capacitor Boxes (Model 20)

AMA512

3

1

4

2

AMA519

1. PC Board 3. Heat Option Contactor

2. Motor Contactor 4. Capacitor Box, single phase only

Unit Description

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Unit Description

Figure 9: Standard Evaporator

AMA513

1

2

4

3

AMA5

1. Evaporator Fans 3. Air Temperature Sensor

2. Expansion Valve 4. Defrost Switch

Unit Description

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Unit Description

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Figure 10: Evaporator with Hot Water and Electric Heat Options

AMA525

1

2 3

4

1. Hot Water Heat Defrost Coil 3. High Temperature Limit Switch

2. Electric Heat Element 4. Air Temperature Sensor

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In-Cab Control Box DescriptionUnit operation is controlled with an in-cab control box, which

is mounted in the truck cab. It includes an on-off key, manual

defrost key, setpoint key, thermometer, thermostat, thermostat

adjustment, and indicator lights.

Figure 11: M-13 In-Cab Control Box

AJA1772

In-Cab Control Box Description

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In Cab Control Box Description

26

DisplayThe display consists of a display screen, keys and indicator

LEDs. The display screen shows the return (box) air

temperature. The screen will display the setpoint temperature if

the setpoint key is pressed.

1. Keys

2. Display Screen

Figure 12: Display Screen

AJA17721 1 2 1


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In Cab Control Box Description

Display DescriptionsThis section describes the display screen, keys andLED

indicators.

1. ON-OFF KEY

It is used to Start/Stop the unit. The internal return air

temperature will be automatically displayed.

2. ON LED Indicator

When on, it indicates that the unit has been started by

pressing the on-off key.

Figure 13: On/Off Key & LED

1

2AJA1802


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Figure 14: Celsius/Fahrenheit LED

3. Celsius LED Indicator

When on, it indicates the temperature being displayed is in

Degrees Celsius.

4. Minus Sign

Indicates the temperature being displayed is below zero.

5. Fahrenheit LED Indicator.

When on, it indicates the temperature being displayed is in

Degrees Fahrenheit.

6. Setpoint Adjust Dial

It is used to adjust the setpoint temperature.7. Setpoint Key

It is used to display the setpoint temperature.

Figure 15: Setpoint Key & Dial

3

4

5AJA1803

6

77

AJA1804


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p

Figure 16: Misc. LEDs

8. Power Cord LEDWhen on, it indicates the unit is plugged to the A.C.

voltage power supply.

9. AC Overload LED

When on, it indicates the unit has been stopped by the AC

Overload Relay.

Figure 17: Defrost Key & LED

10. Unit Operation LEDWhen on, it indicates the unit is cooling.

When the unit is Stopped by the Thermostat, HPCO or

LPCO, the Unit Operation LED must be OFF and th

ON LED Indicator must remain ON.

11. Defrost LED Indicator

When on, it indicates the unit is working on Defrost Mo

12. Manual Defrost Key

It is used to initiate the Defrost Cycle manually.

8

10

9

AJA1805

11

12AJA1806


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Operating InstructionsThermo King has applied the newest technological advances to

develop compact devices that controls unit functioning and

displays operating information quickly and accurately. Thisnew Cab Control Box is designed to be used in both new and

existing Thermo King units.

There is nothing complicated about learning to operate the Cab

Control Boxes manufactured by Thermo King, but you will

find that a few minutes studying the contents of this manual

will be time well spent.

This manual is published for informational purposes only and

the information furnished herein should not be considered asall-inclusive or meant to cover all contingencies.

In-Cab Control Boxes manufactured by Thermo King can

work with 12 VDC units.

You can also display at your convenience the thermometer &

the set point temperature in both Celsius or Fahrenheit degrees.

To set the voltage & the Celsius/Fahrenheit selectors, contact

your nearest Thermo King dealer.

Figure 18: M-13 In-Cab Control Box

AJA1772

Operating Instructions

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Cab Control Box OperatingInstructions

Displaying Return Air TemperatureDuring normal operation (unit is ON and cooling), the ON

LED Indicator, the Unit Operation LED and

Celsius/Fahrenheit LED Indicator should be ON; the return air

temperature should be displayed on the screen. (See Figure

21.)

Display Setpoint Temperature1. During normal operation, press the Setpoint Key to

display the Setpoint Temperature. (See Figure 19.)

1. Setpoint Key

Figure 19: Setpoint Key

1

AJA1809


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Enter Setpoint Temperature.1. Press the Setpoint Key. The Setpoint Temperature will

displayed on the screen. (See Figure 20.)

2. At the same time, turn the Setpoint Adjust Dial until th

display shows desired temperature.(See Figure 19.)

3. Release the Setpoint Key. The box temperature will be

displayed on the screen. (See Figure 19.)

Defrost Mode Operation

Initiate a Manual Defrost: Pressing the Manual DefrostKey will start the defrost cycle if the evaporator coil

temperature is below 2.2 C (36 F). The defrost LED

will go ON. The unit will return to the cool mode automatica

when the defrost cycle is finished. (See Figure 21.)

1. Setpoint Adjustable Dial

2. Setpoint Key

Figure 20: Entering Setpoint

1

2AJA1807

CAUTION: The Setpoint Temperature can be

changed by turning Setpoint Adjust Dial when

Setpoint Key is not pressed.


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34

Initiate a Automatic Defrost: The defrost timer will

initiate a defrost cycle if the evaporator coil temperature is

below 2.2 C (36 F). The defrost LED will go ON. The unit will

return to the cool mode automatically when the defrost is

finished.(See Figure 21.)

Stop the Defrost Cycle: Press and release the On-Off Keytwice to stop the defrost cycle. Weekly Pretrip Inspection

The following Weekly Pretrip Inspection should be completed

before loading the truck. While the weekly inspection in not a

substitute for regularly scheduled maintenance inspections, it is

important part of the preventive maintenance program

designed to head off operating problems before they happen.

1. LEAKS. Inspect for refrigerant leaks and worn refrigerantlines. Check for proper refrigerant charge level.

2. BELTS. Inspect for cracks, wear and proper belt tension.

3. MOUNTING BOLTS. Inspect bolts for proper tightening.

4. ELECTRICAL. Electrical connections should be securely

fastened. Wires and terminals should be free of corrosion,

cracks or moisture.

2

1AJA1808

1. On/Off Key

2. Manual Defrost Key

Figure 21: On/Off Key and Defrost Key


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5. DEFROST DRAINS. Check the defrost drain hose and

fittings to be sure that they are open so condensate can run

out during defrosting. Check the bottom end of drain hose

to be sure that is not plugged or crushed.

6. STRUCTURAL. Visually check for physical damage.

7. REFRIGERANT CHARGE. Start the unit. Check the

sight glass level with the compressor running.

Engine Operation

1. Start the truck engine.

2. Press the on-off switch on the cab control box, the

ON/OFF LED must go ON.

3. Dial the thermostat setting above and below the box

temperature to check thermostat operation on the cab

control box.

4. Set the thermostat at the desired temperature, allow the

unit to run for one-half to one hour (longer if possible)

before loading the truck. Pre-cooling will remove residual

body heat and moisture from the box interior and provide

a good test of the refrigeration system

5. When the unit has finished pre-cooling the truck interio

(evaporator temperature dropped below 36 F (2.2 C),

initiate a defrost cycle with the manual defrost switch. T

defrost cycle should end automatically.


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Electric Standby Operation

1. Connect the external power supply to the power

receptacle. Make sure that the power supply voltage is

correct for the unit. The power cord led should go ON.

2. Press the on-off switch in the cab control box, the ONLED should go ON.

3. Dial the thermostat setting above and below the box

temperature to check thermostat operation on the cab

control box.

Figure 22: Electric Power Receptacle

4. Set the thermostat at the desired temperature, allow the

unit to run for one-half to one hour (longer if possible)

before loading the truck. Pre-cooling will remove residual

body heat and moisture from the box interior and provide

a good test of the refrigeration system

5. When the unit has finished pre-cooling the truck interior

(evaporator temperature dropped below 36 F (2.2 C),

initiate a defrost cycle with the manual defrost switch. The

defrost cycle should end automatically.

NOTE: Even though the truck engine is started the unit will

work on Electric Standby if the power cord is plugged in.


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Unit OperationUnits cycle between Cool and Null to maintain the box

temperature at the thermostat setpoint. The operating modes

are: Cool, Null, and Defrost.

The thermostat controls the operation of the unit by energizingand de-energizing the Power Relay (PR). When PR is

energized it energizes the evaporator fans, the condenser fans,

and the compressor clutch (or the compressor motor contactor

during electric stand-by operation).

The condenser fan is also controlled by the condenser fan

pressure switch (CFPS) on R-134a units. This normally open

switch monitors the compressor discharge pressure. When the

discharge pressure rises to 180 psi (1241 kPa) the switch closesand energizes the condenser fan. When the discharge pressure

drops below 130 psi (896 kpa) the switch opens and

de-energizes the condenser fan.

Thermostat Operation

Cool

The thermostat energizes the (PR) at box temperatures high

than 5.4 F (3.0 C) above setpoint. The thermostat keeps PRenergized while the box temperature is higher than setpoint

The fans and the compressor run and the unit cools.

Null

The thermostat de-energizes PR at box temperatures lower

than setpoint. The thermostat keeps PR de-energized while

box temperature is lower than 5.4 F (3.0 C) above the setpo

temperature. When PR is de-energized and the unit does nooperate. On TC units PR is de-energized only when the

condition is required from both thermostats.


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Figure 23: Thermostat Algorithm

Defrost

The defrost cycle can be initiated any time the evaporator coil

temperature is below 36 F (2.2 C). Defrost is initiated

automatically by the defrost timer, or manually by pressing the

manual defrost switch.The defrost relay energizes the defrost solenoid valve (and the

condenser solenoid valve on units equipped with the heat

option) to route hot refrigerant gas to the evaporator when PR

is energized. The defrost relay also interrupts power to the

evaporator and condenser fans during defrost.

The defrost cycle will continue until the evaporator coil

temperature rises 8.9 C (48 F), causing the defrost termination

switch to open ending the defrost cycle. Defrost cycle can be

also terminated stopping the unit pressing the ON/OFF Switch

twice.

Temperature

DropTemperature

Rise

3.0 C (5.4 F)

Above Setpoint

Setpoint

NULL

COOL

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001

Loading and Enroute InspectionsThermo King refrigeration units are designed to maintain the

required temperature for the product being carried during its

time in transit. Because of the units unique design, special careis required during loading to prevent cargo spoilage.

Pre-Loading Inspection1. Inspect all door seals, including vent doors, for condition

and a tight seal with no air leakage.

2. Inspect the cargo compartment inside and out for damaged

or loose skin and insulation.

3. Inspect the inside of the cargo compartment for damaged

walls, air ducts, floor channels or T flooring, clogged

defrost drain tubes, and clogged or damaged floor

channels which could block the air return, creating

isolated areas in the load that are warmer than the desired

temperature.

4. Pre-cool the cargo compartment. Adjust the setpoint to

desired cargo temperature and allow the unit to run a

minimum of 30 to 60 minutes (longer if possible) befoloading. Check to be certain the setpoint temperature is

correct for the cargo.

Pre-cooling before loading will remove residual heat a

moisture from the cargo compartment and prepare it to

receive the refrigerated load. Pre-cooling also provides

good test of the refrigeration system.

5. Make sure products are pre-cooled to the proper

temperature before loading. Any variance should be noon the manifest.

6. Supervise product loading to make sure that there is

sufficient air space around and through the load so air fl

is not restricted.

Loading and Enroute Inspections

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Figure 24: Loading Considerations

1. Unit Inspection

2. Good Outside Air Circulation

3. Gaskets Equally Compressed

4. Clear Defrost Drains5. Tight Doors

6.Good Air Circulation AroundLoad

7.Interior and Exterior Walls andInsulation in Good Condition

8.Cargo at Proper TemperaturePrior to Loading

1

6

AMA526

2 3 4

5

7

8

7


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Inspecting the LoadNever assume that the product has been loaded properly. Watch

for and perform the following tasks. It takes only a few

minutes and could save you or your employer considerable

time and money later on.1. Make sure the unit is off before opening the cargo

compartment doors. During operation, the unit blows out

refrigerated air, and draws in outside air.

NOTE: The unit can be run with the doors open if the

truck is backed into a refrigerated warehouse with tight

door seals.

2. Perform a final check of the load temperature. If the load

is too hot or too cold, make a final notation on themanifest.

3. While inspecting to see that the cargo is loaded proper

make sure the evaporator inlets and outlets are not

blocked.

4. Close or supervise the closing of the cargo compartme

doors. Make sure they are securely locked.

5. Check to make sure the unit setpoint is set at the desire

temperature as listed on the manifest.

6. If the unit was stopped, restart using the appropriate

starting procedure outlined in this manual.

7. Repeat the after-start inspection.

8. Defrost the unit 30 minutes after loading by starting a

manual defrost cycle.

CAUTION: Make sure cargo is pre-cooled to the

proper temperature before loading. The unit is

designed to maintain temperature, not cool an

above-temperature load.


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Enroute InspectionsNOTE: Enroute inspections are recommended every four

hours for the prevention of damage to the cargo.

1. Note the setpoint to make certain no one has altered the

setting since picking up the load.

2. Note the return air temperature reading. It should be

within the desired temperature range. If the return air

temperature reading is not within the desired temperature

range, it indicates one of the following:

a. The unit has not had sufficient time to pull down the

temperature. Refer to log, if possible, for history of

load (for example, above temperature load, properly

pre-cooled cargo compartment, length of time onroad).

b. The unit is in defrost or has just completed defrost.

NOTE: You can cancel defrost by turning the unit off,

then restarting the unit.

c. The evaporator is plugged with frost. Initiate a manual

defrost cycle. The defrost cycle will be automatically

terminated.

d. Improper air circulation within the cargo

compartment. Inspect the cargo compartment (if

possible) to determine if the evaporator fans are

working and properly circulating the air. Poor air

circulation can be due to improper loading of the

cargo or shifting of the load.

WARNING: The unit may START automatically AT

ANY TIME while it is turned ON. Make sure to turn

the unit OFF before opening unit doors or inspecting

any part of the unit.


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e. The unit may have a low refrigerant charge. If liquid

is not showing in the unit receiver tank sight glass, the

refrigerant charge may be low. Adding refrigerant or

repairing the refrigeration system requires a

competent mechanic. Refer such problems to the

nearest Thermo King dealer or authorized ServiceCenter, or call the Thermo King Cold Line telephone

number shown on the inside back cover of this

manual for referral.

NOTE: If the temperature in the compartment is not

within the desired temperature range, repeat the Enroute

Inspection every 30 minutes until the compartment

temperature comes within the desired temperature range.

3. Initiate a Manual Defrost cycle after each Enroute

Inspection.

CAUTION: Stop the unit if the compartment

temperature remains outside the desired temperatu

range from the setpoint on two consecutive 30 minu

inspections. Contact the nearest Thermo King

Service Center or your company office immediately

Take all necessary steps to protect and maintain

proper load temperature.


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Specifications

GENERAL

Main Compressor SELTEC TM-16XD

Electrical Compressor FRASCOLD D211Y

System Oil Capacity Main: 5.1 oz (150 cc)

Standby Operation: 40.1 oz (1200 cc)

Compressor Oil Type Polyol Ester P/N 203-515

Refrigerant 8.1 lbs (3.7 kg) R-404A

8.0 lbs (3.6 kg) R-134a

Defrost Method: Hot gas

Defrost Timer: Initiation Interval Adjustable, 1 hour to 10 hours

Termination Interval Termination is not timed.Defrost is terminated by Klixon

switch.

Specifications

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ELECTRICAL SYSTEM

Fuses

Fuse 1: Evaporator Fan Motor (EF1) 15 amps

Fuse 2: Evaporator Fan Motor (EF2) 15 ampsFuse 3: Engine-driven Compressor Clutch Coil, Condenser SolenoidValve Coil (heating option), Hot Gas Solenoid Valve Coil

15 amps

Fuse 5: Condenser Fan Motor (CFM1) 15 amps

Fuse 6: Condenser Fan Motor (CFM2) 15 amps

Fuse 7: Evaporator Fan Motor (EF3) 15 amps

Fuse 4: Electric Standby 3 amps

Fuse 4/1: Cab Control Box 3 amps

Condenser Fan Motors (2)

Voltage Full Load rpm Full Load Current

13 Vdc 3000 9.2 Amps

Specifications

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Evaporator Fan Motors (3)

Voltage Full Load rpm Full Load Current

13 Vdc 2700 6.2 Amps

Coils for Hot Gas Solenoids

Voltage Current Resistance

12 Vdc 2.3 Amps 5.2 Ohms

AC Electric Motor

Voltage Phase Frequency Full Load Current

208/230 3 60 Hz 14.1 Amps

208/230 1 60 Hz 16.0 Amps

BELT TENSION Check vehicle manufacturer specifications

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Maintenance Inspection ScheduleA closely followed maintenance program will help to keep

your Thermo King unit in top operating condition. The

following general schedule is provided to assist in monitoringthat maintenance.

For more specific detail, see the maintenance manual for your

unit and to the PreTrip Inspection chapter in this manual.

After first week of operation:

Check belt tension.

Tighten unit mounting bolts.

Check refrigerant level.

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Maintenance Inspection Schedule

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Check all unit mounting bolts, brackets, lines, hoses, etc.

Weekly Monthly Semi-

Annual

Annual Inspect/Service These Items

Maintenance Inspection Schedule

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WarrantyTerms of the Thermo King Warranty are available on request.

Please reference document TK 51350 for the Thermo King

Vehicle-Powered Truck Unit Warranty.

Warranty

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Gl

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001

GlossaryThis glossary is published for informational purposes only and

the information being furnished herein should not be

considered as all-inclusive or meant to cover all contingencies.NOTE: Additional terms not found in the glossary may be

located in the index section of this manual.

accumulator: A device located in the suction line to collectliquid refrigerant and meter it safety back to the compressor as

gas.

ambient air temperature: Temperature of the airsurrounding an object.

amp: Abbreviation for ampere. The basic measuring unit ofelectrical current.

bar: A metric unit of pressure. 1 bar = 100 kPa = 14.5 psi.

Battery Sentry: Part of the CYCLE-SENTRYsystem. The

Battery Sentry module monitors alternator charge rate and will

keep the unit running until the battery is adequately charged.

box temperature: The temperature within atemperature-controlled compartment.

Btu (british thermal unit): The quantity of heat requiredraise the temperature of one pound of water by one degree

Fahrenheit. 1 Btu = 252 calories.

bulkhead: 1)return air bulkhead. A metal or plastic wal

placed at the front of the box to prevent loading of product

tightly against the Thermo King unit. (Loading too close to

unit restricts air flow and system efficiency.) 2) bulkhead

divider. A thick, insulated wall used to separate

compartments of a multi-temperature truck or trailer.calorie: The amount of heat required to raise temperature one gram of water one degree Celsius. 1 calorie = 0.004 Btu

Celsius: The metric unit of temperature measurement. Thpreferred alternate to the term centigrade. Abbreviated C.

centigrade. See Celsius.

Glossary

CFC Chl fl b A hl i b d f i d A f bi i hi h h

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56

CFC: Chlorofluorocarbon. A chlorine-based refrigerant

consisting of chlorine, fluorine and carbon. Example: R12. In

many countries it is illegal to release this type of refrigerant to

the atmosphere because chlorine damages the earths

atmosphere. CFC refrigerants are not used in modern Thermo

King units.circuit breaker: A thermal device that automaticallyinterrupts an electrical circuit when the current in the circuit

exceeds the predetermined amperage rating of the breaker. See

amp.

coil: A cooling or heating element made of pipe or tube,formed into a helical or serpentine shape, that may be equipped

with thin metal fins to aid heat transfer.

cold curtains: Flexible vinyl curtains used to reduce airexchange between the refrigerated compartment and the

outside during door openings.

compound gauge: A gauge calibrated in psig (or kPa) tomeasure pressure, and in inches of mercury (Kg/cm2) to

measure vacuum.

compressor: The refrigeration component that compresses

refrigerant vapor and creates refrigerant flow.

condenser: An arrangement of tubing in which the

vaporized and compressed refrigerant is liquefied as heat is

removed.

cycles per second: SeeHertz.

damper door: A door on the evaporator section that closesduring defrost to prevent hot air from entering the refrigeratedcargo compartment.

data logger: An electronic device that monitors and storesunit operating and temperature data for later review. Examples:

DMS, DAS, DRS and AccuTrac.

DE: Dual Evaporator. A multi-temp host unit with two

evaporators capable of refrigerating two separate, longitudinal

compartments.defrost: The removal of accumulated ice from an evaporatorcoil. Periodic defrost is necessary when the evaporator coil is

operating below freezing. Defrost is required more frequently

when the air passing through the evaporator has a high

moisture content.

defrost termination switch: A component that terminates

defrost operation at a specific temperature.

Glossary

d f t ti A lid t t d l th t i iti t d f t t t Th t f th f i ti t th t b

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defrost timer: A solid state module that initiates defrost at

selected intervals. Also establishes a maximum defrost

duration if normal circuits malfunction.

dehydrator: A device used to remove moisture fromrefrigerant. Also called a drier.

discharge air temperature: The temperature of air leavingthe evaporator.

drier: See dehydrator.

ECT: A ceiling-mounted Thermo King remote evaporator. SeeEWand TLE.

ERC: Extended Remote Unit Control. (Door switches) Anoption on Thermo King multi-temperature units to improve

temperature control when doors are opened during delivery.When a compartment door is opened, the refrigeration unit for

that compartment may be forced to NULL, defrost, or some

other mode. Opening a compartment door may also affect the

operating mode of other compartments. ERC systems are

connected in a variety of ways to meet customer needs.

ETV (Electronic Throttling Valve) : A device used with a

microprocessor to precisely control the refrigeration system.

evaporator: The part of the refrigeration system that abso

heat during the cooling cycle.

EW: A wall-mounted Thermo King remote evaporator. See

ECTand TLE.

F: See Fahrenheit.Fahrenheit: A unit of temperature measurement used in thUnited States. Abbreviated F.

freeze up: 1) Failure of a refrigeration system to operatenormally due to moisture in the refrigerant and the formatio

of ice at the expansion valve. The expansion valve may be

frozen shut or open, causing improper unit operation in eith

case. 2) The formation of a solid ice mass over the evapora

coil reducing air flow.fuse: An electrical safety device (typically a cartridge)inserted into an electrical circuit. It contains material that w

melt or break when the current is increased beyond a specif

value. When this occurs, the circuit is opened and electrical

current flow is stopped.

Glossary

fusible link: An electrical safet de ice (t picall a short hp (horsepower): A nit of po er eq i alent to 746 atts

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58

fusible link: An electrical safety device (typically a short

piece of wire) inserted into an electrical circuit. The wire melts

or breaks when the current is increased beyond a specific

value. When this occurs, the circuit is opened and electrical

current flow is stopped.

HCFC: Hydrochlorofluorocarbon. A chlorine-basedrefrigerant containing hydrogen, chlorine, fluorine and carbon.

Example: R22. Because chlorine damages the earths

atmosphere, in many countries, it is illegal to release this type

of refrigerant to the atmosphere. HCFC refrigerants are not

used in modern Thermo King units.

Hertz: A unit of frequency equal to one cycle per second.

Abbreviated Hz.

HFC: A refrigerant consisting of hydrogen, fluorine andcarbon. Examples: R134a and 404A. HFC refrigerants contain

no chlorine and are, therefore, considered safe for the

environment.

high pressure relief valve: A safety valve on the

refrigeration system that allows refrigerant to escape from the

system if pressure exceeds a predetermined value.

hp (horsepower): A unit of power equivalent to 746 watts

or 550 foot-pounds per second.

HPCO (High Pressure Cut Out Switch): A

pressure-operated switch that opens to stop unit operation

when discharge pressure reaches a predetermined maximum.

invertible: A multi-temperature truck or trailer unit designedto allow the placement of deep-frozen cargo in any

compartment. SeeMulti-Temp.

kPa: Kilopascals. A metric unit of pressure. 1 kPa = 0.01 bar =

0.145 psi.

load: 1) The product being refrigerated and transported.

2) The amount of heat being removed by the refrigeration

system. (For example, a compressor is under a heavy heat loadwhen expected to cool a very warm box.)

LPCO (Low Pressure Cut Out Switch): A

pressure-operated switch that opens to stop unit operation

when suction pressure reaches a predetermined minimum.

modulation: An optional system that reduces load (product)dehydration and avoids top freeze.

Glossary

movable bulkhead: A thick insulated portable wall like psi: Pounds per square inch A unit of pressure

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movable bulkhead: A thick, insulated, portable wall-like

device used to compartmentalize a temperature-controlled

truck or trailer. See bulkhead.

Multi-Temp: A Thermo King truck or trailer unit capable ofmaintaining different set-points in multiple compartments.

no. 1 diesel fuel: A grade of diesel fuel formulated toprevent jelling in low ambient temperatures.

no. 2 diesel fuel: A grade of diesel fuel formulated formoderate to warm ambient temperatures.

ohm: An electrical unit measuring the amount of resistance(opposition to the current flow) in an electrical circuit.

pre-cooling: 1) To cool down an empty box

(temperature-controlled area) to the desired load temperatureprior to loading. 2) To cool cargo to a desired temperature

before loading.

pre-heat: The heating of diesel engine glow plugs prior tostart-up. Some engines use an intake manifold heater rather

than glow plugs.

pre-trip inspection: Checking the operation of a

refrigeration system before loading.

psi: Pounds per square inch. A unit of pressure.

1 psi = 0.069 bar = 6.89 kPa.

psig: Pounds per Square Inch Gauge. Pressure in pounds p

square inch as displayed by a gauge calibrated to zero when

open to the atmosphere.

receiver tank: A refrigerant storage device included innearly all Thermo King units.

refrigerant: The medium of heat transfer in a refrigerationsystem which absorbs heat by evaporating at a low temperat

and releases heat by condensing at a higher temperature.

refrigerant oil: A special oil used to lubricate compressor

refrigeration systems.

remote evaporator: A separate evaporator unit located isecond or third compartment of a multi-temperature truck o

trailer unit.

return air bulkhead: A structure (metal or plastic) mounin the front of a trailer and designed to prevent restriction o

return air flow to the Thermo King unit due to improper

loading. See bulkhead.

Glossary

return air temperature: The temperature of the air Vac (volts alternating current): An electric current that

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return air temperature: The temperature of the air

returning to the evaporator. See box temperature.

rpm: Revolutions per minute.

setpoint: The temperature selected on a thermostat ormicroprocessor controller. This is normally the desired box

temperature.

short cycling: When a refrigeration unit cycles between the

heat and cool modes more often than normal.

sight glass: A system component that permits visualinspection of oil or refrigerant level and condition.

thermostat: A device that controls unit modes of operation tomaintain a selected box temperature.

TLE: Thin-line evaporator. A Thermo King remote evaporatordesigned to be compact (thin) while supplying superior air

flow. SeeECTandEW.

top freeze: When the top portion of perishable cargo is

damaged by freezing temperatures discharged from the

refrigeration unit. This may occur near the front of the box

when product is placed too close to the cold, discharge air flow.

Vac (volts alternating current): An electric current that

reverses direction at regularly recurring intervals.

Vdc (volts direct current): An electric current that flows in

one direction only and is constant in value.

volts: The basic measuring unit of electrical potential.

watt: The basic measuring unit of electrical power.

Index

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Index

AAfter Start Inspection37

CCab Control Box Operating Instructions (M-13, M-16,

M-17)32Compressor15Control Circuits16

D

Defrost Mode Operation (M-13, and M-16 only).33

Display26Display Setpoint Temperature32Displaying Return Air Temperature32

E

Electric Standby Operation17Electrical Hazard10ELECTRICAL SYSTEM46Emergency Cold Line65

enroute inspections39, 42Enter Setpoint Temperature.33

Evaporator16Evaporator Drain Tube Heaters17

FFirst Aid-Refrigerant11First Aid-Refrigerant Oil11Fuses20

G

GENERAL45General Display Information26

IIn-Cab Control Box16In-Cab Control Box Description25inspecting load41Introduction13introduction7

Index

K Refrigerant Oil 11

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K

keypadTK logo27

LLiquid Injection System17loading inspections39loading procedures

pre-loading inspection39

M

Maintenance49Maintenance Inspection Schedule49

O

Oil Separator18Operating Instructions31

Ppre-loading inspection39Protection Features19

RRefrigerant

10

,17

Refrigerant Oil11

SSafety Decals12Safety Precautions9standard display27

T

TK logo key27

U

Unit Description13Unit Features14Unit Operation37

Wwarranty53Weekly Pretrip Inspection34

Serial Number Locations

Serial Number Locations

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Serial Number LocationsCONDENSER: Nameplate located on the back inside wall ofcondenser frame.

ENGINE DRIVEN COMPRESSOR: Nameplate located oncompressor body. The engine driven compressor is located in

the truck engine compartment.

STANDBY COMPRESSOR: Nameplate located on

compressor body. The Standby compressor is located inside the

Condenser assembly.

1. Condenser Serial Number Location2. Stand By Compressor Serial

Number Location

Figure 25: Condenser and Standby CompressoSerial Number Locations

AMA51

21

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Emergency Cold Line

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Emergency Cold Line

If you cant get your rig rolling, and you have tried the Thermo

King North American Service Directory (available from any

Thermo King dealer) to reach a dealer without success, then

call the Toll Free Emergency Cold Line Number

(888) 887-2202.

The answering service at the factory will assist you in reach

a dealer to get the help you need. The Cold Line is answered

hours a day by personnel who will do their best to get you

quick service at an authorized Thermo King Dealer.

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Recover Refrigerant

At Thermo King, we recognize the need to preserve the environmentand limit the potential harm to the ozone layer that can result from

allowing refrigerant to escape into the atmosphere.

We strictly adhere to a policy that promotes the recovery and limits

the loss of refrigerant into the atmosphere.

In addition, service personnel must be aware of Federal regulationsconcerning the use of refrigerants and the certification of technicians.

For additional information on regulations and technician certification

programs, contact your local THERMO KING dealer.

Documents

51878-1-OP V-500 10-20, V-500 MAX 10-20 (Rev 0, 11-04)