AirComm Corporation Air Conditioner R134A Service Manual

Products, INC. 
TR-134 System Service Manual
 
 
January 8, 2010 
Page iv  
 
 
LIST OF EFFECTIVE PAGES
 
 
SECTION PAGE DATE 
   
Title  i  January 8, 2010 
Record of Revisions  ii  January 8, 2010 
  iii  January 8, 2010 
List of Effective Pages  iv  January 8, 2010 
Table of Contents   v  January 8, 2010 
Introduction  1  September 15, 1995 
Air Conditioning System Description  2  September 15, 1995 
  3  September 15, 1995 
  4  March 6, 2002 
  5  September 15, 1995 
Refrigerant Servicing  6  August...

Products, INC. 
TR-134 System Service Manual
 
 
January 8, 2010 
Page v  
 
TABLE OF CONTENTS 
 
 
SUBJECT  PAGE 
   
Title  i 
   
Record of Revisions    ii 
   
Table of Contents    iii 
   
Introduction   
  1 
AIR CONDITIONING SYSTEM DESCRIPTION
    
1.     Vapor Cycle System Description    2 
2.  Electrical Driven Compressor Systems    4 
3.  Engine Driven Compressor Systems    5 
   
REFRIGERANT SERVICING
   
1. General    6 
2. Discharging System    7 
3. Evacuating System    8 
4. Charging...

Products, INC. 
TR-134 System Service Manual
 
 
Sep 15/95 
Page 1 
 
INTRODUCTION 
 
1. PURPOSE 
 
The purpose of this System Service Manual is to provide detailed instructions for 
the servicing, troubleshooting, checking and maintaining of the Keith Products, INC. 
air conditioning systems using R134a refrigerant.  It is intended to be used for all 
Keith Products air conditioning systems using R134a refrigerant that do not contain 
separate maintenance instructions.  The System Service Manual...

Products, INC. 
TR-134 System Service Manual
 
 
Sep 15/95 
Page 2 
 
 
 AIR CONDITIONING SYSTEM - SYSTEM DESCRIPTION
 
 
1.  VAPOR CYCLE SYSTEM DESCRIPTION 
 
The Keith Products vapor cycle air conditioning system uses liquid refrigerant 
R134a to cool the aircraft cabin.  The major components for the R134a air 
conditioning system consists of a receiver/dryer, expansion valve, evaporator, 
compressor and condenser to cool the aircraft cabin.   Figure 1 shows an 
operational schematic of the air...

Products, INC. 
TR-134 System Service Manual
 
 
Sep 15/95 
Page 3 
 
 
 
Figure 1.  Air Conditioning Vapor Cycle System  

Products, INC. 
TR-134 System Service Manual
 
 
March 6/02 
Page 4 
 
2. ELECTRICAL DRIVEN COMPRESSOR SYSTEMS 
 
Electrically operated systems use the aircraft electrical system and are operable in 
most normal flight modes.  Air conditioning may be operated with ground external 
power or the aircraft electrical system providing voltage to the proper buss. 
 
The compressor and condenser are manufactured on an assembly pallet. In most 
cases, the compressor drive and condenser fan drive are both driven...

Products, INC. 
TR-134 System Service Manual
 
 
Sep 15/06 
Page 5 
 
3.  ENGINE DRIVEN COMPRESSOR SYSTEMS 
 
Engine driven systems use compressors that are engine mounted; or on some 
rotorcraft, driven off the tail rotor drive shaft.  A pulley via a V type belt turns the 
compressor.    A clutch mounted on the compressor engages the compressor 
when the air conditioning system is selected ON. 
 
The condenser uses a separate fan with electrical motor to supply cooling air.  The 
condenser cooling air...