AirComm Corporation Cessna 340 340A Installation Service Manual

							 
 
 TABLE OF CONTENTS 
 
SECTION 
 
I. INSTALLATION INSTRUCTIONS 
 
          II.  REQUIRED PUBLICATIONS 
 
         III.  SERVICE AND MAINTENANCE PROCEDURES 
 
         IV.  AIRCRAFT DOCUMENTS  
 
WEIGHT AND BALANCE DATA 
STC NUMBER SA16RM 
FLIGHT MANUAL SUPPLEMENT 
 
  
						

							KEITH PRODUCTS, INC. INSTALLATION INSTRUCTION AND SERVICE MANUAL 
 CESSNA MODEL 340/340A    
SECTION I  INSTALLATION INSTRUCTION 
 
1.  PREPARATION FOR INSTALLATION 
 
A. Remove pilots seat and all passenger seats on left hand side of aircraft. 
 
B. Remove console on left hand side of aircraft housing switch and circuit 
breaker panels. 
 
C. Remove left forward baggage compartment floors. 
 
2.  PLUMBING AND WIRING INSTALLATION 
     (Reference Drawings 34-010 and 34-050) 
 
A. Install switches and circuit breakers in appropriate panels on a space 
available basis and route wiring. 
 
B. Install pressure grommet mounting holes and grommets, as shown on 34-
010 and 34-050 drawings, in the forward and aft pressure bulkheads.  
Install drain valve solenoid. 
 
C. Route plumbing as indicated. 
 
D. Seal pressure grommets with silicone sealer, assuring adequate lengths 
of hoses are present to make connections. 
 
3.  COMPRESSOR/MOTOR PALLET INSTALLATION 
     (Reference Drawing 34-050) 
 
A. Install Z section supports at stations 77 and 91.5 as indicated. 
 
B. Install compressor pallet assembly per drawing. 
 
C. Connect refrigerant lines and electrical wiring.  Use ES49000-3 sealant on 
all plumbing fitting to fitting connections. 
 
4.  PROVISIONS FOR THE CONDENSER FAN INSTALLATION 
     (Reference Drawing 34-050) 
 
A. Position skin doubler as indicated and scribe cutout of the skin;  remove 
doubler and complete cutout;  deburring and smoothing edge. 
SECTION I  INSTALLATION INSTRUCTION  
 
 Page 1 of 9  
						

							KEITH PRODUCTS, INC. INSTALLATION INSTRUCTION AND SERVICE MANUAL 
 CESSNA MODEL 340/340A    
 
4.  PROVISIONS FOR THE CONDENSER FAN INSTALLATION (Contd) 
     (Reference Drawing 34-050) 
 
B. Install doubler, drilling through the skin using the pilot holes in the doubler 
as a pattern.  Rivet in place. 
 
C. Position the fan in position as shown, assuring clearance from 
compressor pallet assembly;  mark attach holes on doubler, remove fan 
assembly and drill through. 
 
D. Install deflector from the inside;  hold in position and drill through flange 
from front two holes installed in Step C previously;  set aside until later. 
 
5.  INSTALLATION OF AIR INLET DEFLECTOR 
     (Reference Drawing 34-050) 
 
A. Position the skin doubler as shown externally and scribe cutout in skin;  
using pilot holes as a pattern, drill all holes;  remove and complete cutout; 
 deburr and smooth edge of cutout. 
 
B. Position doubler on the inside and rivet in place. 
 
C. Position inlet deflector on inside over cutout and drill holes thru skin, 
doubler and flanges.  Install mounting hardware. 
 
D. Position screen and secure as shown. 
 
6.  INSTALLATION OF CONDENSER 
     (Reference Drawing 34-050) 
 
A. Install forward lateral floorboard angle to station 62.0 structure as 
indicated. 
 
B. Mount the condenser to the forward floor panel to clear structure as 
indicated. 
 
C. Notch the legs of the angles on the aft edge of forward panel and the 
forward edge of the aft panel to provide clearance for the upper inboard 
refrigerant hose. 
SECTION I  INSTALLATION INSTRUCTION  
 
 
 Page 2 of 9  
						

							KEITH PRODUCTS, INC. INSTALLATION INSTRUCTION AND SERVICE MANUAL 
 CESSNA MODEL 340/340A    
6.  INSTALLATION OF CONDENSER (Contd) 
     (Reference Drawing 34-050) 
 
D. Install the forward floor panel with condenser and refrigerant lines 
attached by positioning both floors before installing rivnuts to assure 
correct location. 
 
7.  INSTALLATION OF CONDENSER FAN 
 
A. Using washers as shims to match contours, install the fan with provided 
hardware thru the previously installed doubler.  (Install screen and 
negative scoop at the same time.) 
 
B. Install ducting between condenser and condenser fan. 
 
C. Make electrical connections. 
 
8.  INSTALLATION OF EVAPORATOR ASSEMBLY 
     (Reference Drawing 34-010) 
 
A. Aft Overhead Centerline Mounting 
 
1. Locate the zees under headliner and clip into frames at stations 
232 and 242. 
 
2. With the evaporator plastic cover removed, match drill mounting 
panel in conjunction with the zees and attach nutplates in the zees. 
 
3. Attach the evaporator using provided screws. 
 
4. Hook up plumbing connections and drain hose to drain valve in 
lower skin, penetrating bulkhead. 
 
5. Install plastic evaporator cover. 
 
6. Install forward overhead centerline distribution duct . 
 
 
 
SECTION I  INSTALLATION INSTRUCTION  
 
9.  CHARGING AND TESTING 
 
 Page 3 of 9  
						

							KEITH PRODUCTS, INC. INSTALLATION INSTRUCTION AND SERVICE MANUAL 
 CESSNA MODEL 340/340A    
 
A. Charge and test system in accordance with Service Manual TR-134 and 
charging unit instructions. 
 
B. Install aft nose compartment floor. 
 
          
SECTION II  REQUIRED PUBLICATIONS TO INSTALL 34-010-61 AIR 
CONDITIONING KIT 
 
INSTALLATION DRAWINGS: 
 
34-010  GENERAL ARRANGEMENT AND INSTALLATION 
34-050  INSTALLATION COMPRESSOR/CONDENSER 
 
INSTALLATION MANUAL: 
 
34-010-61M  INSTALLATION INSTRUCTIONS (This Document) 
 
SERVICE DOCUMENT: 
 
TR-134  AIR CONDITIONING SERVICE MANUAL 
 
 
 Page 4 of 9  
						

							KEITH PRODUCTS, INC. INSTALLATION INSTRUCTION AND SERVICE MANUAL 
 CESSNA MODEL 340/340A    
SECTION III   SERVICE AND MAINTENANCE PROCEDURES 
 
DESCRIPTION - AIR CONDITIONING SYSTEM 
 
The Keith Products air conditioning unit is composed of two major component 
installations:  (1) the Equipment Package and (2) the Evaporator Package. 
 
The Equipment Package is comprised of the compressor, drive motor, condenser fan, 
coil and receiver dryer. 
 
The Evaporator Package consists of the evaporator coil, blower, blower drive motor and 
the expansion valve. 
 
The control for the system is located on the pilots switch panel and consists of a simple 
on-off switch;  some units carry a fan only position. 
 
When the switch is placed in the ON position, the compressor, driven by an electric 
motor, compresses the refrigerant gas to a high pressure and high temperature.  This 
gas is routed to the condenser where cooling from the fan removes heat from the gas, 
condensing it to a liquid.  The liquid is then stored in the receiver dryer, adjacent to the 
compressor, until it is used.  The refrigerant is metered to the evaporator through the 
expansion valve at a rate to allow all the liquid to evaporate and return to the 
compressor at a reduced pressure.  The cabin heat is absorbed from air passing over 
the evaporator cooling fins.  SEE FIGURE 1. 
 
 
 
 CAUTION 
 
WHEN THE AIR CONDITIONER IS TURNED OFF, IT IS RECOMMENDED THAT A 
MINIMUM OF THREE MINUTES ELAPSE BEFORE IT IS TURNED ON AGAIN:  THIS 
ALLOWS THE COMPRESSOR HEAD PRESSURE TO BLEED OFF AND BRING THE 
STARTING LOAD TO NORMAL. 
 
 
 
 
 
 
 
 
 
 
 Page 5 of 9  
						

							KEITH PRODUCTS, INC. INSTALLATION INSTRUCTION AND SERVICE MANUAL 
 CESSNA MODEL 340/340A    
 
 
Figure 1.  Vapor Cycle Schematic 
 
 Page 6 of 9  
						

							KEITH PRODUCTS, INC. INSTALLATION INSTRUCTION AND SERVICE MANUAL 
 CESSNA MODEL 340/340A    
 
SECTION III   SERVICE AND MAINTENANCE PROCEDURES 
 
EVACUATION AND CHARGING PROCEDURES 
 
Follow the evacuation and charging procedures given for your R134a refrigerant 
charging unit. 
 
CLEANING, INSPECTION AND REPAIR 
 
A.  Cleaning 
 
1. The air conditioning components should be wiped clean with a 
cloth and a stream of low pressure dry air. 
 
B.  Inspection 
 
     To avoid invalidating warranty, the following procedure must be followed: 
 
1. Single 3/8 V Belt 
 
a. Maintain belt tension at 30-35 pounds.  this is equivalent to 
deflecting the belt .3 inch, measured at the center span, with 
a 6-8 pound load being applied perpendicular to the belt. 
 
b. After installing a new belt, reset tension again after 
approximately one hour of operation. 
 
                Every 100 hours inspect the air conditioning system for the following: 
 
1. Security of mounting 
2. Compressor drive belt for proper tension. 
3. Sight gauge for proper refrigerant level. 
4. Remove lint and grease from evaporator with a vacuum. 
 
C.  Repair and Servicing 
 
                Repair to the air conditioning system is limited to the replacement of               
                  components. 
 
 Page 7 of 9