ICON A5 MM : Environmental Control (Utility Systems) : Cabin Heater : Inspection Instructions : Heater Fan and Core Installation (00110+)
Heater Fan and Core Installation (00110+)
100255-01
Use the following procedure to install the heater fan and core.
Applicable Aircraft Serial Numbers
00110+
Type of Maintenance
Line
Level of Certification
LSA-RM
Task Specific Training Required
No
Special Tools Required
None
Parts Required
PA815D4 (FITTING, NIPPLE, BSP-AN3)
AS3582-907 (O-RING, VQM (SILICONE), .694 X .082)
ICA013124 (FAN, ELECTRIC, PUSHER)
ICA008146 (BRACKET, ECS HEATER)
92290A186 (SCREW, SOCKET HEAD, CRES, M4 X 45)
NAS1149CN832R (WASHER, FLAT, CRES, #8 X .032, PSVT)
MS21043-3 (LOCKING NUT, 10-32)
Aircraft System and Number
04—Environmental Control (Utility Systems)
Safety Equipment
As Needed
Consumables
LOCTITE 243 (THREADLOCKER, PRIMERLES, OIL TOL, REMOVABLE MED STR, BLUE
F4 TAPE BLACK (TAPE, SELF-FUSING, SILICONE, .02 IN THK, 1 IN WIDE)
TY24MX (CABLE-TIE, NYLON 6-6, 30LB, TY-RAP)
Task Instructions
1. If ME000251, ECS Heater Core Assembly is not available in stock, then perform Step 2 through Step 8 to assemble prior to installation. Otherwise proceed to Step for installation.
2. Discard hardware that came with HX-CU420V, heater core, if any.
3. Place O-ring (AS3582-907) in O-ring groove of fitting (PA815D4).
4. Repeat Step 3 so that a total of two fittings are prepared for installation.
5. Apply minimal amount of LOCTITE 243 to threads of the heater core.
6. Ensure that no LOCTITE is applied to the surface of the heater core where the fitting O-ring interfaces. Wipe away excess as necessary.
7. Install 2x fittings into heater core.
8. Torque fittings to 95-105 in-lbs. Ensure to keep torque wrench level and parallel with heater core while fittings are being torqued. Inspect for any damage.
9. Ensure fan is oriented as shown with air low indication arrow pointing towards heater core and wire harness positioned in upper right (next to fittings). Apply Loctite 243 to screw threads.
10. Install heater core and fan (ICA013124) onto bracket (ICA008146) using 4x screws (92290A186) and 4x washers (NAS1149CN832R).
11. Torque screws to 7-9 in-lbs.
12. Install heater core assembly (ME000251) onto 4x studs using lubricant and 4x nuts (MS21043-3) and 4x washers (NAS1149C0332R).
13. Torque 4x nuts to 20 in-lbs.
14. Connect connector D9089J to D9089P at the heater fan. Connector should be wrapped with 1.5 full wraps of F4 tape and secured to zip tie mount with TY24MX zip tie.
15. Connect ESC supply and return lines to ECS heater core fittings. Torque B-nuts to 110-130 in-lbs.
Verification Method
Test that the fan works properly. Run the engine for a few minutes, then check and adjust the coolant level and check for coolant leaks.
Verify heater is emitting heat. If not, continue running engine as there may be a bubble in the ECS lines that needs to be pushed out to overflow.