74
Section E - Refrigeration System
13. Installnewlter-drieratcondenseroutlet.
14. Evacuateandchargethesystemusing
recommendedproceduredescribedunder
EvacuatingandRecharging.
15. Reassembleunit.
Filter-Drier Installation
Anytimethesealedsystemisopenedandthe
refrigerantchargeisremoved,theliquidlinelter-
driermustbereplacedandthesystemthoroughly
evacuatedbeforerecharging.
CAUTION
DO NOT unbraze the old filter-drier from the
system. This will vaporize and drive moisture
from the desiccant back into the system. The
old filter-drier should be cut out of the system.
CAUTION
DO NOT unbraze the old filter-drier from the
system. This will vaporize and drive moisture
from the desiccant back into the system. The
old filter-drier should be cut out of the system.
CAUTION
Use only a 15 gram XH9 liquid line filter-drier
(part number 5303305677) when servicing
refrigerator and freezer systems. This filter-
drier is compatible with either R-12 or R-134a
refrigerant.
1. Disconnectunitfromsourceofpower.
2. RecoverrefrigerantbyusinganEPA
approvedrecoverysystem.
3. Usinga3corneredle,scoreagroove
aroundcapillarytubeasclosetooldlter-
drieraspossible.Breakcapillarytubealong
scoremarkfromlter-drier.
4. Cutcondenseroutlettubeatlter-drier.
Discardlter-drier.
5. Thoroughlycleancondenseroutlettubeand
capillarytube.
6. Placeinletconnectionoflter-drierover
condensertubeapproximately¼”andsolder.
7. Insertcapillarytubeinputendintolter-drier
outlet.Donotallowtubetobottomagainst
screen.Soldercarefullysothatsolderdoes
notplugcapillarytube.
Evacuating and Recharging
8. Installprocesstubeadaptortolter-drier.
9. Evacuateandchargesystemusingthe
recommendedproceduredescribedunder
EvacuatingandRecharging.
10. Reassembleunit.
CAUTION
Check the serial plate for the correct
refrigerant type. It is extremely important to
verify the type of refrigerant in the system
before starting any sealed system repairs.
With the possible exception of the vacuum
pump, all service equipment that comes in
contact with R-134a during evacuation and
recharging must be dedicated. Accordingly,
R-134a will require a dedicated charging
cylinder, manifold gauge set, process tube
adaptors, and hoses. Any residual mineral
oil on other tools (tubing cutter, etc.) must
be thoroughly cleaned off before using
on R-134a/Ester oil systems. It will be
necessary to check with the manufacturer
of your vacuum pump for refrigerant and oil
compatibility issues.
If you use a vacuum pump with mineral
oil to evacuate an R-134a system, it is
ABSOLUTELY ESSENTIAL to have a shut-off
valve between the pump and your manifold
gauge set as shown on page Figure E2. The
hand valve must be closed during all times
when the vacuum pump is not operating. This
will prevent the migration of mineral oil vapor
into the R134a/Ester oil system. If the vacuum
pump should stop during evacuation for any
reason, the hand pump shut-off valve must be
closed immediately.
Insure that your refrigeration hoses are
specified for use with R-134a refrigerant.
Research has shown that compounds in
standard refrigeration hoses may enter
sealed systems and ultimately restrict the cap
tube in an R-134a system.