AirComm Corporation Cessna Citation 550 560 Maintenance Manual

							 Products, Inc. 
                                                           Maintenance Manual 
 
21-50-03 
May 15/95 
Page 202 
   
C.  Condenser 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 condenser coil to dry thoroughly prior to additional maintenance. 
 
D.  Compressor Oil Level Check 
 
NOTE: It is not necessary to check the compressor oil level during routine 
maintenance.  It only needs to be checked when a system component is 
replaced or when incorrect oil level is suspected.  Use only polyol ester oil 
viscosity grade 68. 
1.  Operate air conditioning system for 10 minutes.  This will collect as much oil 
as possible in the compressor. 
2.  Discharge air conditioning system and remove compressor from aircraft. 
3.  Place compressor on table such that the oil fill plug is up. 
4.  Remove oil fill plug. 
5.  Insert dipstick into oil fill port. 
6.  Check that the oil level is 5 fluid ounces (at the 5th increment).  Add or 
subtract oil in 1 fluid ounce increments until 5 fluid ounces is obtained.   
7.  Clean oil fill port area and install oil fill plug.  Torque plug to 6 - 9 ft-lbs. 
 
 
 
 
 
 
 
 
 
 
 
 
Figure 201.  Make Dipstick as Shown Above.  
						

							 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 
 
 
  
JBS5005-1 
 
JBS221-1 
  ES20145-1 
 
JBS412-17 
 
ES61108-1 
 
JBS567-2 
 
JBS14002-4 
 
ES20040-4 
 
ES43030-2 
 
ES49011-1 
 
ES49011-2 
 
JBS2020-5 
 
JBS2024-1 
 
JBS460-2 
 
JBS461-5 
 
JBS611-1 
  
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 
 
Tube 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 
   
  FWD EVAPORATOR ASSEMBLY
 
 
DESCRIPTION AND OPERATION 
 
1. GENERAL 
 
The FWD evaporator assembly for the Cessna 500 series is located at the cockpit 
floor and provides 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 
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 FWD 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 Figures 1 
and 2.   
						

							 Products, Inc. 
                                                            Maintenance Manual 
 
21-50-04 
May 15/95 
Page 101 
   
TROUBLESHOOTING 
 
1. GENERAL 
 
The following procedures are used for troubleshooting the fwd evaporator assembly 
portion 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 & 2) 
 
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. 
 
 
  
						

							 Products, Inc. 
                                                            Maintenance Manual 
 
21-50-04 
May 15/95 
Page 201 
 MAINTENANCE PRACTICES 
 
1. GENERAL 
 
The following procedures are used to perform typical maintenance on the evaporator 
assembly. 
 
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 & 2) 
 
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. FWD Evaporator Assembly (STD) 
  
						

							 Products, Inc. 
                                                           Maintenance Manual 
 
21-50-04 
April 25/07 
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 
 
16 
 
17 
  
82-02-102-2 
 
 
82-02-402-1 
 
82-02-402-5 
 
82-02-402-6 
 
82-02-402-7 
 
82-00-441-2 
 
MS20365-1032 
 
NAS221-8 
 
ES35002-6 
 
JBS2048-2 
 
JBS12002-5 
 
JBS238-2 
 
JBS239-3 
 
JBS237-1 
 
ES61060-2 
 
ES73100-1 
 
JBS240-1  
FWD Evaporator 
Installation  
 
Panel Assy 
 
Mounting Bracket     
 
Bracket 
 
Cover Plate 
 
Louver 
 
Nut 
 
Screw 
 
Screw 
 
Evap Assy 
 
 Coil Assy 
 
 Shroud Air Inlet 
 
 Shroud Assy 
 
 Blower Housing 
 
 Motor Assy 
 
 Blower Wheel 
 
 Resistor Assy  
  
 RF 
 
 
 1 
 
 1 
 
1 
 
1 
 
1 
 
2 
 
7 
 
3 
 
1 
 
1 
 
1 
 
1 
 
1 
 
1 
 
1 
 
1 
 
Air Conditioning System -FWD Evaporator  (STD) 
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 18 
 
19 
  
ES26104-1 
 
ES49011-2 
  
   Expansion Valve 
 
   O-ring  
  
 1 
 
1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Air Conditioning System -FWD Evaporator  (STD) 
IPL FIGURE 1  
						

							 Products, Inc. 
                                                           Maintenance Manual 
 
 
21-50-04 
May 15/95 
Page 1004 
 
  
 
 
 
 
Figure 2. FWD Evaporator Assembly (Cool Stick Option)