Bryant FA4A - Manual (Page 17)

AÏÏG/14/2008/THÏÏ 03:49 PM UTC TECH PUB FAX No. 317 240 5662 P. 017
a. Attach manifold/gage set to service valves,
b. Front scat (close) liquid tube service valve,
c. Start yirit in cooling mode.
d. Run unit until vapor pressure reaches 5 pSig (35kPa).
c. 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. E?tcess 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 (35Ji:Pa). 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 indpor 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 unbrace tubes
as required.
NOTE: If a torch Is used to unbraze line set, protect fitting panel
with a wet doth or br^e shield, as necessary. System contains oil
vapors which may ignite when ejeposed 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 oti; a flat surface. Removc=2 screws securing
coil support columns to pan. (See Fig. 15.)
9. Rotate columns 90“, pull away from coil, and remove
columns from assembly.
10. Remove remaining 2 screws securing coil to condensate
pan,
11. Remove coil from condensate pan.
12. Remove coil top seal, (See Fig. 15.)
.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
Sci:c'vv5 previously removed from unit casing,
15. Reinstall coil access and fitting panels.
16. Reconnect liquid and vapor refrigerant tubes, and conden­
sate drain tiibe. Install fr]t6r-drier(s), if necessary.
17. Evacuate tube set and indoor coil, back scat (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^Gonditioners and Heat-Tumps
Service Manual" for further information.
CARE AND MAINTENANCE
To continue high performance, and minimize possible equipment
failure, it is essential periodic maintenance be performed on this
equipment,
11)6 ability to properly perform maiuteuauce on this equipment
requires certain mechanical skills and tools- The only consumer
service recommended or required is filter maintenance. (See Filter
Assembly.)
A
WARNING; Disconnect all power to the unit before
servicing the field wires Or removing the control package.
The disconnect (when used) on the access panel does not
disconnect power to the line side of the disconnect, but
does allow safe
service to all other parts of the unit.
Electrical shock can cause personal injury or death.
The minimum maintenance requirements for this equipment are as
follows:
1. Inspect and clean or replace air filter each month or as
required.
2. Inspect cooling coil, drain pan, and condensate drain each
cooling season for cleanliness. Clean as necessary. An
inspection port is provided on all A-coil delta plates.
Remove plastic plug to inspect. Replace plug after inspec­
tion.
3. Inspect blower motor and wheel for cleanliness each
heating and cooling season. Clean as necessary.
4. Inspect electrical connections for tightness and controls for
proper operation each heating and cooling season. Service
as necessary.
A
WARNING: As witja^any mechanical equipment, per­
sonal injury can .result frpm sharp metal edges. Be careful
^vyhen, removing,parts.
I. FILTER ASSEMBLY
To clean Or replace air filter, push plastic connectors toward center
of unit and remove filter access panel outward. -Push filter up and
back into unit. Then slide filter out. Clean filter by tising cold
water and mild detergent. Rinse and allow filter to dry. No oiling
or coating of filter is required. New filters are available from your
local distributor. Place filter in slot with cross-mesh binding up or
facing cooling coil and replace filter access panel,
II. COOLING COIL, DRAIN RAN, AND CONDENSATE
DRAIN
The cooling coil is easily cleaned when it is dry. Inspect the coil
and clean (if necessary) before each cooling season. To check or
clean cooling coil, rethov^ coil access paiidl. If coil is coated with
dirt or lint, vacuurn it' with a soft brush attachment.
Be careful not to bend coil fins. If coil is coated with oil or grease,
clean it with a mild detergent and water solution. Rinse coil
thoroughly with olpar water;^Be careful not,to splash water on
insulation,
Inspect drain pan and condensate drain at the same time cooling
coil is checked. Clean drain pan and condensate drain by removing
any foreign matter fitom pan. Flush pan and drain tube with clear
water.
If drain tube is restricted, it can generally be cleared by high-
pr'essure water. Cut plastic line and, work outside condensate pan
and away from coil to clpan drain tube, ,,
A
CAUTION: Dp not use caustic household drain cleaners
in the condensate pan or near the coil. Drain cleaners can
quickly destroy a coil,'
III. BLOWER MOTOR AND WHEEL
Clean blower motor and wheel when cooling coil is cleaned.
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