Charging; Drier Replacement - Amana V Series Service Manual

Service Procedures
To avoid risk of electrical shock, severe personal injury or death; disconnect power to unit before servicing, unless
testing requires power. Discharge capacitor through a 10,000 ohm resistor before handling. Wires removed during
disassembly must be placed on the correct terminals to ensure proper grounding and polarization.
6. Continue evacuating system until vacuum gauge
registers 600 microns.
7. At 600 microns, close valve "A" to vacuum pump and
allow micron reading in system to balance. Micron
level will rise.
• If micron level stabilizes at 1000 microns or below
within 2 minutes, system is ready to be charged.
• If micron level rises above 1000 microns and
stabilizes, open valve "A" and continue
evacuating.
• If micron reading rises rapidly and does not
stabilize, a leak exists in the system.
8. If system leaks, proceed as follows:
a. Close valve "A" and valve "C". Invert charging
cylinder and open valve "F" to add partial charge
for purpose of leak checking.
b. Using a leak detector or other means, check
system throughly to identify leak(s).
c. After locating leak(s), capture refrigerant, repair
leak(s), and begin at Step 1.

Charging

NOTE: Size of refrigerant charge in capillary-tube
systems is critical. Exact amount is required for
proper system performance. See tech sheet or
unit serial plate for correct refrigerant charge.
Do not use refrigerant other than that shown on
serial plate.
NOTE: Do not use captured or recycled refrigerant in
Amana units. Captured or recycled refrigerant
voids any warranty.
Procedure:
1. Evacuate system thoroughly per instructions above.
2. Referring to illustration at left, close valves "A"
(vacuum pump), "C" (vacuum gauge) and "E"
(low-side manifold gauge).
3. Set charging cylinder on a refrigerant scale.
4. Open valve "F" (charging cylinder) and let exact
amount of refrigerant flow from cylinder into system.
Close valve.
Low-side gauge pressure should rise shortly after
opening charging cylinder valve as system pressure
equalizes through capillary tube.
If pressure does not equalize, a restriction typically
exists at capillary/drier braze joint.
5. If pressure equalizes, open valve "E" (low-side
manifold gauge) and pinch off high-side drier
process tube.
RS1300004 Rev. 1
!
WARNING
6. Start compressor and draw remaining refrigerant
from charging hoses and manifold into compressor
through compressor process tube.
7. To check high side, pinch off drier process tube.
Close valve "D" (high-side gauge). If high-side
pressure rises, repeat high-side pinch-off and open
valve "D". Repeat until high-side pinch-off does not
leak.
8. Pinch off compressor process tube and remove
charging hose. Braze stub closed while compressor
is operating.
9. Disconnect power. Remove charging hose and braze
high-side drier process tube closed.
10. Recheck for refrigerant leaks.

Drier Replacement

Drier must be replaced when system is opened for any
reason. Before opening system, recover refrigerant for
safe disposal.
Do not debraze drier. Applying heat to remove drier
drives moisture out of drier into system. Cut drier out of
system using the following procedure.
1. Score capillary tube close to drier and break.
2. Reform tubes so you have space in which to use a
large tubing cutter on the drier.
To avoid risk of severe personal injury or death; cut
drier at correct location. Cutting drier in wrong place
allows dessicant beads to scatter, creating a fall
hazard. Clean up beads if spilled.
3. Cut circumference of drier 1-1/4" (3 cm) below point
at which condenser inlet tube joins drier.
4. Remove drier, leaving only its top brazed to system
tubing.
5. Apply heat-trap paste on post-condenser tubes
above drier to protect grommets from high heat.
6. Debraze remaining part of drier and remove it from
system.
7. Discard drier in safe place. Do not leave drier with
customer.
8. If unit is in warranty, old drier accompanies warranty
claim.
22
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WARNING