FCM4, FEV, FEM4, FJM, FMA4, FSA4, FSM4, FSU4, FVM4, FXM4, REM4, WAH, WAM, WAP, WAX, WBHL: Service and Maintenance Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
27
A-Coil Units
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.
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. 25).
9. Remove 4 coil brackets if present (Fig. 25).
10. Remove screws at delta plates and remove coil from vertical
condensate drain pan (Fig. 25).
11. Horizontal Applications Only—Remove drain connections and
J-shaped tube from original coil, and install them in same position
on new coil (Fig. 25).
12. Place coil assembly in plastic condensate pan and secure with 4
screws through delta plate (Fig. 25).
13. Horizontal and Upflow Applications Only—Attach 4 coil brackets
to coil and pan assembly (Fig. 25).
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. 25).
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.
Slope Coil Units
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.
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 and fitting panels.
6. Remove 1 screw securing coil to unit casing.
7. Remove coil/pan assembly from unit.
8. Place assembly on a flat surface.
9. Rotate columns 90°, pull away from coil, and remove columns
from assembly.
10. Remove two screws securing coil to condensate pan (Fig. 26).
11. Remove coil from condensate pan.
12. Attach new painted Top Seal to new coil using brass colored screws
included with packaging (Fig. 26).
13. Remove screw at bottom of coil extension and reuse to attached
Coil Baffle in same location. Long side of baffle toward pan
(Fig. 26).
14. Install new coil into condensate pan using two original screws and
two support columns.
15. Install new coil pan assembly into unit and secure with one screw
previously removed from unit casing.
16. Reinstall coil access panel.
17. 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.
18. Evacuate line set and indoor coil to 500 microns, back seat (open)
liquid and vapor service valves.
19. Turn on electrical supplies to indoor and outdoor units.
20. Check system refrigerant charge and operation. See Split-System
Residential Air Conditioners and Heat Pump Service Manuals for
further information.
CAUTION
!
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.
CAUTION
!
PERSONAL INJURY HAZARD
Failure to follow this caution could 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.
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