Carrier INTEGRA 30S User Manual

OPERATION AND

SERVICE MANUAL

INTEGRA 30S

TRUCK REFRIGERATION UNIT

BEGINNING WITH S/N PB 225225

TABLE OF CONTENTS

PARAGRAPH NUMBER Page

GENERAL SAFETY NOTICES Safety-1............................................................

FIRST AID Safety-1.............................................................................

OPERATING PRECAUTIONS Safety-1............................................................

MAINTENANCE PRECAUTIONS Safety-1..........................................................

SPECIFIC WARNING AND CAUTION STATEMENTS Safety-1........................................

DESCRIPTION 1-1...............................................................................

1.1 INTRODUCTION 1-1.....................................................................

1.2 GENERAL DESCRIPTION 1-1.............................................................

1.3 CONDENSING SECTION 1-1.............................................................

1.3.1 Condenser/Subcooler 1-1..............................................................

1.3.2 Filter Drier 1-1........................................................................

1.3.3 Oil Separator 1-3.....................................................................

1.3.4 Hot Gas Solenoid Valve (HGS1) 1-3.....................................................

1.3.5 Condenser Pressure Control Valve (HGS2) 1-3...........................................

1.3.6 Compressor 1-3......................................................................

1.3.7 Standby Motor 1-3....................................................................

1.3.8 Receiver 1-3.........................................................................

1.3.9 High Pressure Switch (HP1) 1-4........................................................

1.3.10 Condenser Pressure Control Switch (HP2) 1-4............................................

1.4 EVAPORATOR SECTION 1-4.............................................................

1.4.1 Thermostatic Expansion Valve 1-4......................................................

1.4.2 Compressor Pressure Regulating Valve (CPR) (115V Only) 1-4.............................

1.4.3 Defrost T ermination Thermostat (DTT) 1-4...............................................

1.4.4 Quench Valve (BPV) 1-4...............................................................

1.4.5 Evaporator 1-4.......................................................................

1.4.6 Low Pressure Switch (LP) 1-4..........................................................

1.5 SYSTEM OPERATING CONTROLS AND COMPONENTS 1-8.................................

1.6 UNIT SPECIFICATIONS 1-9...............................................................

1.6.1 Compressor Data 1-9.................................................................

1.6.2 Refrigeration System Data 1-9..........................................................

1.6.3 Electrical Data 1-10....................................................................

1.6.4 T orque Values 1-10....................................................................

1.7 SAFETY DEVICES 1-11...................................................................

1.8 REFRIGERANT Circuit 1-12................................................................

1.8.1 Cooling 1-12..........................................................................

1.8.2 Heat And Defrost 1-12..................................................................

i

62--10848

TABLE OF CONTENTS (Continued)

PARAGRAPH NUMBER Page

OPERATION 2-1.................................................................................

2.1 CONTROL SYSTEM 2-1..................................................................

2.1.1 Introduction 2-1......................................................................

1.8.3 Microprocessor Module 2-1............................................................

2.1.2 Cab Command 2-1....................................................................

2.2 START-- UP 2-2..........................................................................

2.2.1 Inspection 2-2........................................................................

2.2.2 Connect Power 2-3...................................................................

2.2.3 Starting 2-3..........................................................................

2.3 SETPOINT ADJUSTMENT 2-3............................................................

2.4 MANUAL DEFROST 2-3..................................................................

2.5 DEFROST CYCLE ADJUSTMENT 2-3......................................................

2.6 ALARM DISPLAY 2-4.....................................................................

2.6.1 Accessing Alarm Messages 2-4........................................................

2.6.2 Low Battery Voltage Alarm for Road Only Units 2-5.......................................

2.6.3 Clearing Alarm Messages 2-5..........................................................

2.7 CHECKING THE EEPROM VERSION 2-5...................................................

2.8 STOPPING THE UNIT 2-5................................................................

2.9 MICROPROCESSOR CONFIGURATION 2-6................................................

2.9.1 ROAD ONLY FUNCTIONAL SETTINGS 2-6.............................................

2.9.2 ROAD/STANDBY FUNCTIONAL SETTINGS 2-7.........................................

TEMPERATURE CONTROL 3-1...................................................................

3.1 SEQUENCE OF OPERATION 3-1..........................................................

3.1.1 Perishable Mode 3-1..................................................................

3.1.2 Frozen Mode 3-1.....................................................................

3.2 DEFROST CYCLE 3-2....................................................................

3.3 MINIMUM OFF TIME 3-2.................................................................

SERVICE 4-1....................................................................................

4.1 MAINTENANCE SCHEDULE 4-1...........................................................

4.2 BELT MAINTENANCE AND ADJUSTMENT 4-2..............................................

4.2.1 Standby Motor--Compressor V-Belt 4-2..................................................

4.3 INSTALLING R-134A MANIFOLD GUAGE SET 4-2..........................................

4.3.1 Preparing Manifold Gauge/Hose Set For Use 4-2.........................................

4.3.2 Connecting Manifold Gauge/Hose Set 4-2................................................

4.3.3 Removing the Manifold Gauge Set 4-3..................................................

4.4 REMOVING THE REFRIGERANT CHARGE 4-3.............................................

4.4.1 Refrigerant Removal From A Non--Working Compressor. 4-3...............................

4.5 REFRIGERANT LEAK CHECKING 4-3.....................................................

4.6 EVACUATION AND DEHYDRATION 4-4....................................................

4.6.1 General 4-4..........................................................................

4.6.2 Preparation 4-4.......................................................................

4.6.3 Procedure For Evacuation And Dehydrating System 4-4...................................

62--10848

ii

TABLE OF CONTENTS (Continued)

PARAGRAPH NUMBER Page

SERVICE (Continued) 2-1........................................................................

4.7 CHARGING THE REFRIGERATION SYSTEM 4-5...........................................

4.7.1 Checking The Refrigerant Charge 4-5...................................................

4.7.2 Installing A Complete Charge 4-5.......................................................

4.7.3 Adding A Partial Charge 4-5............................................................

4.8 CHECKING FOR NON--CONDENSABLES 4-5...............................................

4.9 REPLACING THE COMPRESSOR 4-6.....................................................

4.9.1 Removing Compressor 4-6.............................................................

4.9.2 Installing Compressor 4-6..............................................................

4.10 CHECKING AND REPLACING FILTER-DRIER 4-6...........................................

4.10.1 Checking Filter-Drier 4-6...............................................................

4.10.2 Replacing The Filter-Drier 4-6..........................................................

4.11 HIGH PRESSURE (HP1) AND CONDENSER PRESSURE (HP2) SWITCHES 4-6................

4.11.1 Removing Switch 4-6..................................................................

4.11.2 Checking Pressure Switch 4-6..........................................................

4.12 CHECKING AND REPLACING CONDENSER FAN MOTOR BRUSHES 4-7.....................

4.13 HOT GAS (HGS1) AND CONDENSER PRESSURE CONTROL SOLENOID VALVES 4-7.........

4.13.1 Replacing Solenoid Coil 4-7...........................................................

4.13.2 Replacing Valve Internal Parts 4-7.......................................................

4.14 ADJUSTING THE COMPRESSOR PRESSURE REGULATING VALVE (CPR) (115V ONLY) 4-8....

4.15 THERMOSTATIC EXPANSION VALVE 4-8..................................................

4.15.1 Replacing expansion valve 4-8.........................................................

4.15.2 Measuring Superheat 4-8..............................................................

4.16 DIAGNOSTIC TOOL 4-9..................................................................

4.17 MICROPROCESSOR 4-9.................................................................

4.18 EVAPORATOR COIL CLEANING 4-9.......................................................

4.19 CONDENSER COIL CLEANING 4-9........................................................

TROUBLESHOOTING 5-1.........................................................................

5.1 INTRODUCTION 5-1.....................................................................

5.2 REFRIGERATION 5-2....................................................................

5.2.1 Unit Will Not Cool 5-2.................................................................

5.2.2 Unit Runs But Has Insufficient Cooling 5-2...............................................

5.2.3 Unit Operates Long or Continuously in Cooling 5-3........................................

5.2.4 Unit Will Not Heat or Heating Insufficient 5-3.............................................

5.2.5 Defrost Malfunction 5-3................................................................

5.2.6 Abnormal Pressure 5-3................................................................

5.2.7 Abnormal Noise 5-4...................................................................

5.2.8 Cab Command Malfunction 5-4.........................................................

5.2.9 No Evaporator Air Flow or Restricted Air Flow 5-4.........................................

5.2.10 Expansion Valve 5-4..................................................................

5.2.11 Malfunction Hot Gas Solenoid or Condenser Pressure Regulating Valve 5-4..................

5.2.12 Standby Compressor Malfunction 5-4...................................................

SCHEMATIC DIAGRAMS 6-1......................................................................

6.1 INTRODUCTION 6-1.....................................................................

iii

62--10848

LIST OF ILLUSTRATIONS

FIGURE NUMBER Page

Figure 1-1 Integra 30S 1-2......................................................................

Figure1-2 TopView 1-2.........................................................................

Figure 1-3 Rear View Evaporator 1-3.............................................................

Figure 1-4 Oil Separator 1-3.....................................................................

Figure 1-5 Typical Standby Control Box 1-5

Figure 1-6 Standby Microprocessor Module 1-6....................................................

Figure 1-7 Road Microprocessor Module 1-7.......................................................

Figure 1-8 Cab Command 1-8...................................................................

Figure 1-9 Refrigeration Circuit Cooling Cycle 1-13..................................................

Figure 1-10 Refrigeration Circuit Heating Cycle 1-14..................................................

Figure 2-1 Cab Command 2-1...................................................................

Figure 2-2 Green Light Status -- Standby 2-2......................................................

Figure 2-3 Green Light Status -- Road Only 2-2....................................................

Figure 2-4 Temperature Selection Jumper 2-7......................................................

Figure 3-1 Operating Sequence -- Perishable Mode 3-1.............................................

Figure 3-2 Operating Sequence -- Frozen Mode 3-1................................................

Figure 4-1 Belt Tension Gauge 4-2...............................................................

Figure 4-2 Layout of V-belt 4-2...................................................................

Figure 4-3 Manifold Gauge Set (R-134a) 4-3.......................................................

Figure 4-4 Vacuum Pump Connection 4-4.........................................................

Figure 4-5 Typical Setup For Testing Pressure Switches HP1 And HP2 4-7............................

Figure 4-6 Fan Motor Brushes 4-7................................................................

Figure 4-7 Hot Gas or Condenser Pressure Control Solenoid 4-7.....................................

Figure 4-8 Compressor Pressure Regulating Valve 4-8..............................................

Figure 4-9 Thermostatic Expansion Valve Bulb And Thermocouple 4-8................................

Figure 4-10 Cab Command Diagnostic Tool 4-9.....................................................

Figure 6-1 Electrical Schematic Wiring Diagram - Based On Dwg. No. 62-61350 Rev D 6-2.............

Figure 6-2 Electrical Schematic Wiring Diagram - Based On Dwg. No. 62-61350 Rev D 6-3.............

Figure 6-3 Electrical Schematic Wiring Diagram - Based On Dwg. No. 62-61353 Rev A 6-5..............

Figure 6-4 Electrical Schematic Wiring Diagram - Based On Dwg. No. 62-61354 Rev A 6-6..............

Figure 6-5 Electrical Schematic Wiring Diagram - Based On Dwg. No. 62-61354 Rev A 6-7..............

Figure 6-6 Electrical Schematic Wiring Diagram - Based On Dwg. No. 62-61352 Rev A 6-9..............

LIST OF TABLES

TABLE NUMBER Page

Table 1-1 Model Chart 1-1......................................................................

Table 1-2 Additional Support Manuals 1-1........................................................

Table 2-1 Alarms For Road Only Units 2-4........................................................

Table 2-2 Alarms For Standby Units 2-5..........................................................

Table 4-1 Maintenance Schedules 4-1...........................................................

Table 4-2 Service Category Descriptions 4-1......................................................

Table 4-3. Belt Tension (See Figure 4-2) 4-2.......................................................

Table 4-4 R-134a Temperature-Pressure Chart 4-10................................................

Table 5-1 Alarm Indications 5-1.................................................................

Table 5-2 Mechanical Indications 5-2.............................................................

62--10848

iv

SAFETY SUMMARY

SAFETY PRECAUTIONS

Your Carrier Transicold refrigeration unit has been designed with the safety of the operator in mind. During normal
operation, all moving parts are fully enclosed to help prevent injury. During all pre-trip inspections, daily inspections,
and problem troubleshooting, you may be exposed to moving parts. Stay clear of all moving parts when the unit is in
operation and when the ON/OFF switch is in the ON position.

FIRST AID

No injury, no matter how slight, should go unattended. Always obtain first aid or medical attention immediately.

OPERATING PRECAUTIONS

Always wear safety glasses. Wear hearing protection as required.
Keep hands, clothing and tools clear of the evaporator and condenser fans.

No work should be performed on the unit until all circuit breakers are turned off, and battery power supply is
disconnected.

Always work in pairs. Never work on the equipment alone.
In case of severe vibration or unusual noise, stop the unit and investigate.

MAINTENANCE PRECAUTIONS

Beware of unannounced starting of the unit. This unit is equipped with Auto--Start in both the road and standby modes.
The unit may start at any time. When performing any check of the system make certain all circuit breakers are turned
off, and battery power supply is disconnected.

Be sure power is turned off before working on motors, controllers, solenoid valves and electrical control switches. Tag
circuit breaker and vehicle ignition to prevent accidental energizing of circuit.

Do not bypass any electrical safety devices, e.g. bridging an overload, or using any sort of jumper wires. Problems with
the system should be diagnosed, and any necessary repairs performed, by qualified service personnel.

When performing any arc welding on the unit or container, disconnect all wire harness connectors from the
microprocessor. Do not remove wire harness from the modules unless you are grounded to the unit frame with a static
safe wrist strap.

In case of electrical fire, open circuit switch and extinguish with CO

REFRIGERANTS

The refrigerant contained in your unit can cause frostbite, severe burns, or blindness when in direct contact with the
skin or eyes. For this reason, and because of legislation regarding the handling of refrigerants during system service,
we recommend that you contact your nearest Carrier Transicold authorized repair facility whenever your unit requires
refrigeration system service .

(never use water).

2

62--10848Safety-1

SPECIFIC WARNING AND CAUTION STA TEMENTS

To help identify the label hazards on the unit and explain the level of awareness each one carries, an explanation is
given with the appropriate consequences:

DANGER -- means an immediate hazard which WILL result in severe personal injury or death.

WARNING -- means to warn against hazards or unsafe conditions which COULD result in severe personal injury or
death.

CAUTION -- means to warn against potential hazard or unsafe practice which could result in minor personal injury,
product or property damage.

The statements listed below are applicable to the refrigeration unit and appear elsewhere in this manual. These
recommended precautions must be understood and applied during operation and maintenance of the equipment
covered herein.

WARNING

Beware of unannounced starting of the unit. The unit may cycle the fans and operating compressor
unexpectedly as control requirements dictate. Press OFF key on the cab command and disconnect
power plug.

WARNING

Do not attempt to connect or remove power plug before ensuring the unit is OFF (press OFF key on
Cab Command) and external power circuit breaker is open.

WARNING

Beware of V-belt and belt-driven components as the unit may start automatically.

WARNING

Ensure power to the unit is OFF, power plug is disconnected and circuit breaker is open or vehicle
engine is OFF and negative battery cable is connected before replacing compressor.

WARNING

Slowly open the plug on the suction and discharge valves of the new compressor to vent the nitrogen
holding charge.

WARNING

Do not use a nitrogen cylinder without a pressure regulator. (See Figure 4-5) Cylinder pressure is
approximately 2350 psig (160 bars). Do not use oxygen in or near a refrigerant system as an explo­sion may occur.

CAUTION

Under no circumstances should anyone attempt to repair the microprocessor module or Cab Com­mand! Should a problem develop with these components, contact your nearest Carrier Transicold
dealer for replacement.

62--10848

Safety-2

CAUTION

If starting unit for the first time after installation or starting after adding/removing an optional feature

if Owners operating parameters have changed, the Configuration will need to be reset.

or

CAUTION

Compressor failure will occur if inert gas brazing procedures are not used on units with
R134A and POE oil. For more information see Technical Procedure 98-50553-00 -- Inert Gas
Brazing.

CAUTION

To prevent trapping liquid refrigerant in the manifold gauge set be sure set is brought to suction
pressure before disconnecting.

CAUTION

Do not damage or over tighten the enclosing tube assembly. Place all parts in the enclosing tube in
proper sequence in order to avoid premature coil burn-out.

CAUTION

Observe proper polarity when installing battery, negative battery terminal must be grounded.

CAUTION

Underno circumstances should a technician electrically probe the processor at any point, other than
the connector terminals where the harness attaches. Microprocessor components operate at differ­ent voltage levels and at extremely low current levels. Improper use of voltmeters, jumper wires, con­tinuity testers, etc. could permanently damage the processor.

CAUTION

Most electronic components are susceptible to damage caused by electrical static discharge (ESD).
In certain cases, the human body can have enough static electricity to cause resultant damage to the
componentsby touch. This is especiallytrue of the integrated circuits found on the microprocessor.
Use proper board handling techniques. (See Section 4.17).

62--10848Safety-3

SECTION 1

Road

S

d

b

lb(

DESCRIPTION

1.1 INTRODUCTION

WARNING

Beware of unannounced starting of the
unit. The unit may cycle the fans and operat­ing compressor unexpectedly as control re­quirements dictate. Press OFF key on the
Cab Command and disconnect power plug.

This manual contains Operating Data, Electrical Data
and Service Instructions for the Carrier Transicold
Model 30S truck refrigeration units listed in Table 1-1.

Additional support manuals are listed in Table 1-2.
The model/serial nameplate is located on the cover.

1.2 GENERAL DESCRIPTION

The unit (Figure 1-1) is of the split system type with the
condenser mounted outside the truck body, evaporator
mounted in the body, and a Cab Command control
center mounted in the driver’s compartment. Two types
of compressor drive are available:

D Road operation: the road compressor is located in
the engine compartment and is driven by the engine
of the vehicle when in operation over--the--road

D Road/Standby version: a second compressor is
mounted in the condensing section and is driven by
an electric motor when in standby mode.

Table 1-1 Model Chart

1.3 CONDENSING SECTION

The condensing section (see Figure 1-2) contains the
condenser fan & coil, filter--drier, oil separator, hot gas
solenoid valve, receiver, and a condenser pressure
control valve. On road/standby units the condensing
section also houses the standby compressor, control
box and rectifier and houses the transformer assembly
(see Figure 1-2 and Figure 1-5 ).

1.3.1 Condenser/Subcooler

The condenser is of the tube and fin type and acts as a
heat exchanger in which the compressed refrigerant
gas is condensed into a liquid and lowered in tempera­ture. Air movement over the condenser is provided by a
fan mounted in the condensing section.

A portion of the condenser is occupied by the subcooler.
Refrigerant leaving the receiver is passed through the
subcooler where additional heat is removed. Removal
of this additional heat helps to ensure that only liquid
refrigerant enters the thermal expansion valve.

1.3.2 Filter Drier

The drier is a cylindrical shell containing a drying agent
and screen. It is installed in the liquid line and functions
to keep t he system clean and remove moisture from the
refrigerant.

R134a

Model No. Description

8002189 Road Only --

8002191

8002193

8002195

Manual Number

Road/Standby

1 15/1/60Hz

Road/Standby

230/1/60Hz

Road/Standby

230/3/60Hz

62--10835 Supra 30S Parts List
62--10847 Supra 30S Easy To Run
62--10849 Supra 30S Operator’s Manual

LB Kg

4 1.8 TM 16

Table 1-2. Additional Support Manuals

Equipment Covered Type of Manual

Compressor

Compressor

tan

TM 16

Condenser Weight

y

Road

88 lb

(40 kg)

Road and

Standby

165 lb (75

kg

Evap. Wt.

66

30

Kg)

1-1

62-10848

CAB COMMAND

Figure 1-1 Integra 30S

1

1

2

17

16

1. Nameplate

2. Condenser Coil

3. Transformer (TR)

4. Oil Separator

5. Standby Motor

6. Standby Compressor (See Table 1-1)

7. Control Box

8. Filter Drier

9. Liquid Line Check Valve

15

3

14

4

13

12

Figure 1-2 Top View

5

10. Sight Glass
1 1. Receiver

12. Discharge Manifold

13. Hot Gas Solenoid Valve (HGS1)

14. Condenser Pressure Control Switch (HP2)

15. Frame

16. High Pressure Switch (HP1)

17. Condenser Pressure Control Valve (HGS2)

6

11

10

9

7

8

1-262-10848

1

6

2

3

5

4

1. Low Pressure Switch (LP)

2. Expansion Valve (TXV)

3. Quench Valve (BPV)

4. Defrost Termination Thermostat (DTT)

Figure 1-3 Rear View Evaporator

1.3.3 Oil Separator

The oil separator is installed in the discharge line from
the road compressor. The hot gas coming from the com­pressor is forced through a filter which separates the
gas from the oil. The oil collects at the bottom after
passing through a second filter and then returns to the
compressor via a capillary tube.

OIL AND GAS­FROM COMP.

REFRIGERANT
GAS TO
COND.

OIL TO
COMP.

SUCTION
LINE

OIL

Figure 1-4 Oil Separator

1.3.4 Hot Gas Solenoid Valve (HGS1)

HGS1 is normally closed and prevents discharge gas
from entering the evaporator. The valve opens to allow
hot gas refrigerant to be delivered from the compressor
to the evaporator during heat or defrost modes.

5. Evaporator coil

6. Compressor Pressure Regulating Valve
(CPR)115V only

1.3.5 Condenser Pressure Control Valve (HGS2)

The condenser pressure control valve (or condenser
closing valve) is a normally open valve that is powered
when the condenser pressure control switch (HP2) is
closed. With the solenoid coil de-energized, the valve is
in the cool mode and the compressor discharge gas is
delivered to the condenser. In the cool mode, heat is
removed from the air inside the truck body and rejected
to the surrounding air. With the solenoid coil energized,
the valve is in the heat mode and the compressor dis­charge gas is diverted to the evaporator and rejected to
the air inside the truck body.

1.3.6 Compressor

The compressor withdraws refrigerant gas from the
evaporator and delivers it to the condenser at an in­creased pressure. The pressure is such that refrigerant
heat can be absorbed by the surrounding air at ordinary
temperatures.

1.3.7 Standby Motor

The standby motor operates on nominal
1 15v--1ph--60hz or 208/230v--1ph--60hz or
230v--3ph--60hz power. An overload and short cycle
protection is provided along with automatic reset. Units
are also equipped with a remote mounted power recep­tacle.

1.3.8 Receiver

Liquid refrigerant from the condenser is deliver to the
receiver. The receiver serves as a liquid reservoir when
there are surges due to load changes in the system; as a
storage space when pumping down the system and as a
liquid seal against the entrance of refrigerant gas into
the liquid line.

1-3

62-10848

1.3.9 High Pressure Switch (HP1)

HP1 is a normally closed switch which monitors the
system for high pressure and shuts down the unit when
pressure rises above predetermined setting. For HP1
settings see Section 1.6.2.

1.3.10 Condenser Pressure Control Switch (HP2)

HP2 is a normally open switch which closes to signal the
microprocessor to activate the condenser fan. HP2 also
cycles the condenser pressure control valve (HGS2)
and the quench valve (BPV) in addition to the condenser
fan in order to maintain head pressure for heating ca­pacity. For HP2 settings see Section 1.6.2.

1.4 EVAPORATOR SECTION

The evaporator assembly consists of an evaporator fan,
evaporator coil, thermostatic expansion valve, defrost
termination thermostat, a compressor pressure
regulating valve (115V only) and a quench valve.

1.4.1 Thermostatic Expansion Valve

The thermostatic expansion valve is an automatic de­vice which controls the flow of liquid to the evaporator
according to changes in superheat to the refrigerant
leaving the evaporator. The thermal expansion valve
maintains a relatively constant degree of superheat in
the gas leaving the evaporator regardless of suction
pressure. Thus, the valve has a dual function; automatic
expansion control and preventing liquid from returning
to the compressor. For TXV superheat settings see
Section 1.6.2. To adjust the TXV, refer to Section

4.15.2.

1.4.2 Compressor Pressure Regulating Valve
(CPR) (115V Only) (See Figure 1-3)

The CPR valve is installed on the suction line of the
standby compressor to regulate the suction pressure
entering the compressor. The CPR valve is set to limit
the maximum suction pressure. For CPR settings refer
to section 1.6.2.

The suction pressure is controlled to avoid overloading
the electric motor during high box temperature
operation. To adjust the CPR valve, refer to section 4.17

1.4.3 Defrost Termination Thermostat (DTT)

Normally closed thermal switch on Standby units only.
As evaporator cools to setpoint, the switch closes and
signals microprocessor that defrost may be initiated.
Switch terminates defrost by opening at predetermined
setpoint. For DTT settings refer to section 1.6.2.

1.4.4 Quench Valve (BPV)

The quench valve is a normally closed solenoid valve
controlled by the quench thermostat (BPT) mounted on
the road compressor discharge line. The valve allows
metered liquid refrigerant to enter the suction line in the
evaporator in order to provide compressor cooling. For
BPT settings refer to section 1.6.2.

1.4.5 Evaporator

The evaporator is of the tube and fin type. The operation
of the compressor maintains a reduced pressure within
the coil. At this reduced pressure, the liquid refrigerant
evaporates at a temperature sufficiently low enough to
absorb heat from the air. Air movement over the evapo­rator is provided by an electric fan.

1.4.6 Low Pressure Switch (LP)

The low pressure switch is a normally closed switch
which signals the microprocessor to shut down the unit
when the system is outside the low pressure limit. For
LP settings refer to section 1.6.2.

1-462-10848

6

5

4

3

2

1

7

8

9

10

11

12

115/1/60

1. Standby clutch fuse (F2) -- 30 Amp

2. Standby Fuse (F3) -- 5 Amp

3. Transformer Fuse (F4) -- 5 Amp

4. Clutch Time Delay Relay (CT) -- Single Phase
Only

5. Clutch Relay (CR)

6. Motor Contactor (MC)

7. Overload Relay (OL) (230V Only)

12

230/1/60

13

230/1/60

14

13

115/1/60

8. Diode

9. Rectifier Bridge Assembly (BR)

10. Filter Capacitor (C1)

1 1. Start Relay (STBR)

12. Run Capacitor (CR)

13. Start Capacitor (CS)

14. Heat sink (rectifier bridge)

Figure 1-5 Typical Standby Control Box

1-5

62-10848

1

2

9

3

8

4

1. Connector

2. Road Relay (RR)

3. 12 Volt dc Road Connection

4. 12 Volt dc Standby Connection

5. Standby Relay (SR)

Figure 1-6 Standby Microprocessor Module

7

6

6. C_ or F_ Temperature Selector

7. Microprocessor (PC)

8. Road Fuse (F1) 30A

9. Overload Relay (OL) 25A (115V Only)

5

1-662-10848

1

2

3

1. C_ or F_ Temperature Selector

2. Road fuse (25A)

3. + Positive Battery Connection

4. -- Negative Battery Connection

5. --Microprocessor (PC)

5

4

Figure 1-7 Road Microprocessor Module

1-7

62-10848

1.5 SYSTEM OPERATING CONTROLS AND
COMPONENTS

The unit is furnished with a microprocessor control sys­tem. Once the setpoint is entered at the Cab Command,
the unit will operate automatically to maintain the de­sired temperature within very close limits.

WARNING

Beware of unannounced starting of the,
standby motor, evaporator fan or conden­ser fan. The unit may cycle the standby mo­tor or fans unexpectedly as control require­ments dictate.

The control system consists of the Cab Command lo­cated in the driver’s section (See Figure 1-8) and the
microprocessor module (See Figure 1-6) located in the
control box.

The Carrier Transicold Control System incorporates the
following features:

a. Control return air temperature to tight limits by provid-

ing refrigeration control, heat and defrost to ensure
conditioned air delivery to the load.

b. Permanently displays the return air temperature and

on request the setpoint temperature.

c. Digital display and selection of data.

CAUTION

Under no circumstances should anyone at­tempt to repair the microprocessor module
or Cab Command! Should a problem devel­op with these components, contact your
nearest Carrier Transicold dealer for re­placement.

Figure 1-8 Cab Command

1-862-10848

1.6 UNIT SPECIFICATIONS

1.6.1 Compressor Data

Model

Displacement

TM 16

9.9 in

(

162 cm3)

3

No. Cylinders 6

15.5 lbs

Weight

(7 kg)

Oil Charge 5.07in3(180 cm3)

Approved Oil Mobil Arctic EAL68

1.6.2 Refrigeration System Data

a. Defrost Timer

Automatic triggering or at preset intervals :
0 (Disabled), auto, 1h, 2h, 3h, 4h, 5h, 6h

b. Defrost Termination Thermostat(DTT) (Standby

Only)

Opens at: 48_ ¦ 5_F(9_ ¦ 3_C)
Closes at: 37_ ¦ 5_F(3_ ¦ 3_C)

c. High Pressure Switch (HP1)

Cutout at : 355 psig ± 10 PSI (24.5 bars)

Cut-in at : 290 psig ± 10 PSI (20 bars)

d. Condenser Pressure Control Switch (HP2)

Cutout at : 130 psig ± 10 PSI (9 bars)

Cut-in at : 175 psig ± 10 PSI (12 bars)

e. Refrigerant charge

RefertoTable1-1.

f. Compressor Pressure Regulating Valve (CPR)

115V only

19±1 psig (1.3 Bar)

g. Thermostatic Expansion Valve (TXV)

Superheat setting = 4_C(7¦ 1_F) at box temperature
of -20_C(0_F).

h. Low Pressure switch (LP)

Cutout at : --13.23 inHG ± 6inHG
(-- 0.45 ± 0.2 bar)

Cut-in at : +6.5 psig ± 3 psig
(+0.44 ± 0.2 bar)

i. Quench Thermostat (BPT)

Opens at: 248_F (120_C)
Closes at: 220_F (104_C)

1-9

62-10848