AirComm Corporation Cessna Citation 500 501 Maintenance Manual

							Products, Inc  
 Maintenance Manual 
 
 
  21-50-03
May 15/95
Page 1001
 
 
 
 
Figure 1. Compressor/Condenser Assembly 
  
						

							Products, Inc  
 Maintenance Manual 
 
 
  21-50-03
May 15/95
Page 1002
 
FIG. ITEM  
 PART 
 NUMBER  
 NOMENCLATURE  
 EFFECT  
 UNITS  
 PER  
 ASSY 
 
1 1 
 
 2 
 
  
 3 
 
4 
 
5 
 
6 
 
7 
 
8 
 
9 
 
10 
 
11 
 
12 
 
13 
 
14 
 
15 
 
 
  
JBS5005-2 
 
JBS221-1 
  ES20145-1 
 
JBS412-17 
 
ES61108-1 
 
JBS567-2 
 
JBS14002-4 
 
ES20040-4 
 
ES43030-2 
 
ES49011-1 
 
ES49011-2 
 
JBS2020-5 
 
JBS2024-1 
 
JBS443-9 
 
JBS443-10 
 
JBS611-2 
  
Compressor/Condenser  
 
Compressor Assy 
   Shim Accessory Kit 
 
Condenser Coil 
 
Motor 
 
Fan Duct 
 
Pulley, Ribbed Drive 
 
Belt, Pulley V 
 
Receiver Drier Bottle 
 
O-ring 
 
O-ring 
 
Pressure Switch 
 
Fan Assy 
 
Hose Assy 
 
Hose Assy 
 
Belt Guard Assy 
  
 
  
 RF 
  
1 
 
 
1 
 
1 
 
1 
 
1 
 
1 
 
1 
 
3 
 
2 
 
1 
 
1 
 
1 
 
1 
 
1 
 
 
 
Air Conditioning System - Compressor/Condenser Assembly 
IPL FIGURE 1  
						

							Products, Inc  
 Maintenance Manual 
 
 
  21-50-04
May 15/95
Page 1
 
   LEFT & RIGHT EVAPORATOR ASSEMBLIES
 
 
DESCRIPTION AND OPERATION 
 
1. GENERAL 
 
Two evaporator/blower units are located in the aft cabin at the spar  (at floor level) 
within the aircraft interior.  They  provide cooling airflow for the cabin  and cockpit 
areas of the interior.  The left evaporator is ducted to provide cooling airflow to the 
flight crew through a floor mounted air outlet or through dedicated ducting at the 
pilots and co- pilots control stick.  The right evaporator is ducted to provide cooling 
airflow to the aft cabin through a floor mounted air outlet.  Each evaporator assembly 
includes an evaporator coil, blower with motor, expansion valve and air outlet 
ducting. 
 
This section of the maintenance manual discusses troubleshooting and maintenance 
practices used for the evaporator assembly portion of the air conditioning system.  
Additional troubleshooting and testing procedures for the evaporator blower is 
contained in 21-50-01, page 101.   An  Illustrated Parts List is included in Figure 1 for 
the left and right evaporators.   
						

							Products, Inc  
 Maintenance Manual 
 
 
  21-50-04
May 15/95
Page 101
 
TROUBLESHOOTING 
 
1. GENERAL 
 
The following procedures are used for troubleshooting the left and right evaporator 
assemblies of the air conditioning system. 
 
2.  TOOLS AND EQUIPMENT 
 
 
Designation  
Ref. No.  
Qty  
Remarks 
 
 
Service Pressure Gauge  
Comm. Avail.  
1  
None 
 
28vdc Source  
  
A/R  
None 
 
3.  EVAPORATOR  TROUBLESHOOTING PROCEDURES (REF. IPL Fig. 1) 
 
NOTE:   Always attach a service gauge set to system prior to being trouble 
shooting to insure proper refrigerant charge is present. 
 
A.  Water is Being Blown from Air Outlets. 
1.  Operate GPU and apply 28 vdc electrical power. 
2.  Select air conditioning system to ON. 
3.  Check evaporator drain for condensate runoff. 
4.  If no runoff, clear drain of blockage or verify that routing is in a down hill 
orientation. 
     5.  Select air conditioning OFF, remove electrical power. 
 
B.  No Cooling at Evaporator.  
1.  Connect service pressure gauge to service ports located near 
compressor/condenser assembly. 
2.  Operate GPU and apply 28 vdc electrical power. 
3.  Select air conditioning system to ON. 
4.  Check  evaporator for proper cooling.  If cooling not sufficient, check 
refrigerant level to ensure that system is correctly charged, this can be 
confirmed by a clear sight glass (no bubbles) on the top of the receiver 
dryer. If bubbles are present, add refrigerant till sight glass just clears.  
5.  If system is correctly charged, replace  expansion valve per Maintenance 
Practices procedure. 
 
 
 
MAINTENANCE PRACTICES  
						

							Products, Inc  
 Maintenance Manual 
 
 
  21-50-04
May 15/95
Page 202
 
1. GENERAL 
 
The following procedures are used to perform typical maintenance on the left and 
right evaporator assemblies. 
 
2.  TOOLS AND EQUIPMENT 
 
 
Designation  
Ref. No.  
Qty  
Remarks 
 
 
Sealant  
ES49000-1  
A/R  
None 
 
Polyol Ester Oil  
Comm. Avail.  
A/R  
Viscosity Grade 68 
 
Vacuum Cleaner  
Comm. Avail.  
1  
None 
 
Coil Cleaner  
Comm. Avail.  
A/R  
Non-acid based 
 
3.  EVAPORATOR MAINTENANCE PROCEDURES (REF. IPL Fig. 1) 
 
A.  Expansion Valve Replacement 
1.  Discharge system in accordance with recovery equipments instructions.  
2.  Disconnect liquid line from inlet of expansion valve, and cap. Remove the 
thermal sense bulb from its clamp located on the suction tube of the 
evaporator and carefully remove insulation covering bulb. 
3.  Disconnect the fitting that connects the valve to the coil and plug coil fitting. 
4.  Install new expansion valve  and o-ring in the reverse order.  
5.  Lubricate o-ring with polyol ester oil or apply sealant to fitting mating 
surfaces prior to assembly. 
6.  Install the thermal sense bulb such that it makes contact with the suction 
tube along its entire length. Insulate the bulb thoroughly with insulation. 
 
B.  Evaporator Coil Cleaning Procedure 
1.  Use vacuum cleaner to remove large debris from upstream and downstream 
coil faces. 
2.  Spray coil cleaner on both coil faces.  Wash off with water. 
3.  Allow coil to dry thoroughly prior to additional maintenance. 
  
						

							Products, Inc  
 Maintenance Manual 
 
 
  21-50-04
May 15/95
Page 1001
 
 
 
 
 
 
 
 
 
 
Figure 1. Left  and Right Evaporator Assemblies 
R/H Shown, L/H Opposite 
 
 
  
						

							Products, Inc  
 Maintenance Manual 
 
 
  21-50-04
April 25/07
Page 1002
 
FIG. ITEM  
 PART 
 NUMBER  
 NOMENCLATURE  
 EFFECT  
 UNITS  
 PER  
 ASSY 
 
1 1 
 
 
 2 
 
 5 
 
6 
 
7 
 
8 
 
9 
 
10 
 
11 
 
20 
 
21 
 
22 
 
23 
 
 
 
  
82-75-105-2 
 
 
82-75-405-3 
 
82-75-405-7 
 
82-75-405-8 
 
82-75-405-12 
 
82-01-403-5 
 
AN737TM91 
 
ES70009-2 
 
JBS275-2 
 
JBS237-1 
 
JBS240-2 
 
ES61060-2 
 
ES73100-2 
 
 
 
 
 
  
Blower/ Evaporator 
Installation  
 
Mounting Bracket 
 
Mounting Bracket  (L/H) 
 
Mounting Bracket (R/H) 
 
Cover Panel 
 
Screen 
 
Hose Clamp 
 
Duct 
 
Blower Assy (R/H) 
 
      Blower Housing 
 
      Resistor Assy 
 
      Motor Assy 
 
      Blower Wheel 
 
 
 
 
 
  
  
 RF 
 
 
 1 
 
 1 
 
1 
 
1 
 
1 
 
8 
 
240 in 
 
1 
 
1 
 
1 
 
1 
 
1 
 
 
 
 
 
 
 
 
Air Conditioning System -Left and Right Evaporator Assemblies 
IPL FIGURE 1 
  
						

							Products, Inc  
 Maintenance Manual 
 
 
  21-50-04
April 25/07
Page 1003
 
FIG. ITEM  
 PART 
 NUMBER  
 NOMENCLATURE  
 EFFECT  
 UNITS  
 PER  
 ASSY 
 
1 12 
 
 22 
 
24 
 
21 
 
25 
 
13 
 
30 
 
32 
 
14 
 
30 
 
31 
 
 
 
 
 
  
JBS13001-1 
 
ES61060-2 
 
JBS862-4 
 
JBS240-2 
 
ES73088-10 
 
JBS275-5 
 
ES26104-1 
 
JBS12011-4 
 
JBS275-6 
 
ES26104-1 
 
JBS12011-3 
 
 
 
 
 
 
 
  
Blower Assy (L/H)  
 
     Motor Assy  
 
     Blower Housing Assy 
 
            Resistor 
 
      Blower Wheel 
 
Evap Assy (R/H) 
 
      Expansion Valve 
 
      Evap Coil  
 
 Evap Assy (L/H) 
 
      Expansion Valve 
 
      Evap Coil 
 
     
 
 
 
 
 
  
  
 1 
 
 1 
 
 1 
 
1 
 
1 
 
1 
 
1 
 
1 
 
1 
 
1 
 
1 
 
 
 
 
 
 
 
 
 
Air Conditioning System -Left and Right Evaporator Assemblies 
IPL FIGURE 1