And Replacement - Bryant SM03-4 Service Manual

13. Install new coil into condensate pan using 2 original screws
and 2 support columns.
NOTE: Correct coil position in condensate pan is essential to
reliable operation.
14. Install new coil/pan assembly into unit. Secure with 2
screws previously removed from unit casing.
15. Reinstall coil access and fitting panels.
16. Reconnect liquid and vapor refrigerant tubes, and conden-
sate drain tube. Install new liquid line filter-drier.
17. Evacuate tube set and indoor coil to 500 microns, back seat
(open) liquid and vapor service valves.
18. Turn on electrical supplies to indoor and outdoor units.
19. Check system refrigerant charge and operation. See "Split-
System Residential Air Conditioners and Heat Pumps
Service Manual" for further information.
FX4A AND FV4A COIL/CONDENSATE PAN REMOVAL
AND REPLACEMENT (PURON REFRIGERANT)
I. A-COIL UNITS
If it is determined that system does not have leaks and refrigerant
is not contaminated, proceed as follows:
1. Recover system refrigerant.
a. Attach manifold/gage set to service valves.
b. Front seat (close) liquid tube service valve.
c. Start unit in cooling mode.
d. Run unit until low pressure switch opens at 50 psig
(350kPa) or vapor pressure reaches 5 psig (35kPa). Do
not allow compressor to pump into a vacuum.
e. Turn off electrical supply to outdoor unit.
f. Front seat vapor service valve.
g. Recover any remaining refrigerant.
NOTE: All outdoor unit coils will hold only factory-supplied
amount of refrigerant. Excess refrigerant, such as in long-tube
applications, may cause compressor internal pressure relief valve
to open (indicated by sudden rise in vapor pressure) before vapor
pressure reaches 5 psig (35kPa). If this occurs, turn off electrical
supply to outdoor unit immediately, front seat vapor service valve,
and recover any remaining refrigerant.
2. Turn off electrical supply to indoor unit.
3. Disconnect condensate drain tube.
4. Disconnect liquid and vapor tubes from indoor coil. Use a
tubing cutter to cut tubes.
NOTE: If a torch is used to unbraze tube set, protect fitting panel
with a wet cloth or braze shield, as necessary.
5. Remove coil access panel.
6. Remove clip securing fitting panel to condensate drain pan.
Remove fitting panel.
7. Remove any shipping clips, including horizontal pan clip,
and slide coil/condensate pan assembly out of unit.
8. Upflow or Horizontal Applications Only—Remove hori-
zontal condensate drain pan from coil/condensate pan
assembly. (See Fig. 31.)
9. Remove 4 coil brackets. (See Fig. 31.)
10. Remove screws at delta plates and remove coil from vertical
condensate drain pan. (See Fig. 31.)
11. Horizontal Applications Only—Remove coil top seal
(attached with 4 screws) and J-shaped tube from original
coil and install it in same position on new coil. (See Fig.
31.)
12. Place coil assembly in plastic condensate pan and secure
using 4 screws through delta plate. (See Fig. 31.)
13. Horizontal and Upflow Applications Only—Attach 4 coil
brackets to coil/pan assembly. (See Fig. 31.)
14. Horizontal Applications only—Place horizontal conden-
sate pan into position on coil/pan assembly.
NOTE: Installation of horizontal condensate pan is not necessary
for upflow or downflow applications.
15. Slide complete 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. Secure with 1 screw. (See Fig. 31.)
18. Reinstall coil access panel.
19. Reconnect liquid and vapor refrigerant tubes, and conden-
sate drain tube. Install new Puron (R-410A) liquid line
filter-drier.
20. Evacuate tube 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 "Ap-
plication Guideline and Service Manual for R-410A" for
further information.
II. SLOPE COIL UNITS
If it is determined that system does not have leaks and refrigerant
is not contaminated, proceed as follows:
1. Recover system refrigerant.
a. Attach manifold/gage set to service valves.
b. Front seat (close) liquid tube service valve.
c. Start unit in cooling mode.
d. Run unit until low pressure switch opens at 50 psig
(350kPa) or vapor pressure reaches 5 psig (35kPa). Do
not allow compressor to pump into a vacuum.
e. Turn off electrical supply to outdoor unit.
f. Front seat vapor service valve.
g. Recover any remaining refrigerant.
NOTE: All outdoor unit coils will hold only factory-supplied
amount of refrigerant. Excess refrigerant, such as in long-tube
applications, may cause compressor internal pressure relief valve
to open (indicated by sudden rise in vapor pressure) before vapor
pressure reaches 5 psig (35kPa). If this occurs, turn off electrical
supply to outdoor unit immediately, front seat vapor service valve,
and recover any remaining refrigerant.
2. Turn off electrical supply to indoor unit.
3. Disconnect condensate drain tube.
4. Disconnect liquid and vapor tubes from indoor coil. Use
either a tubing cutter to cut tubes or a torch to unbraze tubes
as required.
NOTE: If a torch is used to unbraze line set, protect fitting panel
with a wet cloth or braze shield, as necessary. System contains oil
vapors which may ignite when exposed to a flame.
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. Remove 2 screws securing
coil support columns to pan. (See Fig. 32.)
9. Rotate columns 90°, pull away from coil, and remove
columns from assembly.
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