Carrier FCM - Installation - A-Coil Units Only

FCM/A5, FEV, FJM, FEM4, FHMA5, FMA4/5, FM(C,U)5, FS(A,M,U)4, FTMA5, F(V,X)M4, F5M4, REM4, WA(H,M,P,X) WB(G,H)L, WC(G,H)L: Service and Maintenance
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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2. Tighten the nut finger tight plus 1/2 turn.
3. The vapor header contains a small diameter stub tube for the
equalizer line.
4. Cut the end of the stub tube.
5. Insert TXV equalizer and braze together. Caution must be taken to
avoid braze splatter from the aluminum surfaces of the new coil.
Caution must be taken to avoid heating the factory joint of the stub
tube to the vapor header.
6. The vapor header contains an indentation for the TXV bulb. Attach
the bulb and insulate.
Installation – A-Coil Units Only
1. Recover system refrigerant.
a. Attach gage/manifold set to service valves.
b. Start unit in cooling mode.
c. Front seat (close) liquid line service valve.
d. Operate unit until vapor pressure reaches 5 psig (35kPa), or until
suction line LPS opens.
e. Turn off electrical supply to outdoor unit.
f. Front seat (close) vapor service valve.
g. Recover any remaining refrigerant.
A13359
Fig. 29 – A-Coil Component Location
NOTE: All condenser coils hold only a factory-supplied amount of
refrigerant. Excess refrigerant, such as in long-line applications, may
cause compressor internal pressure relief valve to open (indicated by
sudden rise in vapor pressure) before refrigerant is recovered. If this
occurs, turn off electrical supply to outdoor unit immediately, front seat
(close) vapor service valve, and recover any remaining refrigerant.
2. Turn off electrical supply to indoor unit.
3. Disconnect condensate drain line.
4. Disconnect liquid and vapor lines from indoor coil. Use a tubing
cutter to cut the lines.
5. Remove coil access panel.
6. Remove clip securing fitting panel to condensate drain pan and
remove fitting panel.
7. Remove all shipping clips (if present), including horizontal pan
clip. Slide coil and condensate pan assembly out of unit.
8. Remove horizontal condensate drain pan from coil (if present) and
condensate pan assembly (Fig. 29).
9. Remove 4 coil brackets if present (Fig. 29).
10. Remove screws at delta plates and remove coil from vertical
condensate drain pan (Fig. 29).
11. Horizontal Applications Only—Remove drain connections and
J-shaped tube from original coil, and install them in same position
on new coil (Fig. 29).
12. Place coil assembly in plastic condensate pan and secure with 4
screws through delta plate (Fig. 29).
13. Horizontal and Upflow Applications Only—Attach 4 coil brackets
to coil and pan assembly (Fig. 29).
14. Horizontal Applications Only—Place horizontal condensate pan
into position on coil and pan assembly.
NOTE: Installation of horizontal condensate pan is not necessary
for upflow or downflow applications.
15. Slide completed assembly into unit.
16. Reinstall fitting panel and reconnect clip securing fitting panel to
condensate drain pan.
17. Horizontal Applications Only—Reinstall horizontal pan clip and
secure with 1 screw (Fig. 29).
18. Reinstall coil access panel.
19. Reconnect liquid and vapor refrigerant lines and condensate drain
line. Install new filter drier(s).
NOTE: If a torch is used to unbraze the line set, protect the fitting panel
with a wet cloth or braze shield as necessary.
20. Evacuate line set and indoor coil to 500 microns, back seat (open)
liquid and vapor service valves.
21. Turn on electrical supplies to indoor and outdoor units.
22. Check system refrigerant charge and operation. See Split-System
Residential Air Conditioners and Heat Pump Service Manuals for
further information.
Cond. Trough
Coil Top Seal
Pan Shield
(2 per unit)
Coil Bracket
(4 per unit)
Vertical Condensate Pan
Horizontal
Condensate Pan
Strainer
Rubber Plug
Rubber Plug
Support
Cond. Trough
Drip Ring
TXV
Delta Plate
Screws-
Delta Plate To Pan
(4 per unit)
WARNING
!
PERSONAL INJURY HAZARD
Failure to follow this caution may result in personal injury.
Use of torch may cause oil to catch fire, resulting in personal injury or
death. To remove components use tubing cutter only.