CSP−900RMM−2MD Helicopters, Inc.
Rotorcraft Maintenance Manual
Page 205
Revision 36
12-00-00
(9). Inspect evaporator, condensers, com
pressor, receiver dehydrator and all
fittings and tube connections for leaks.
(10). Repair connections and components
with leaks.
(11). If there are no leaks, continue the AC
system servicing.
Oil, Daphne Hermetic (R-134A) (C117)
Refrigerant oil must be the
same type specified by the
manufacturer of the compressor. Failure to
use the correct refrigerant oil will cause
damage to the compressor.
NOTE:
Make sure of the System R number be
fore you fill the system.
Do not mix refrigerants.
If charging system due to replacement of
a component other than the compressor
or after a leak that may have resulted in
oil leakage has been fixed, go to Step (12).
If charging the air conditioning because a
new or overhauled compressor will be
installed, go to Step (13).
(12). Before you fill the AC system:
(a). Add the quantity of refrigerant oil
removed in Step (4).(a). then add 2.0
to 3.0 oz (60 to 90 cc) of daphne
hermetic oil (C117).
(b). Do not add more than 5.5 oz. (160
cc) total.
(c). Go to Step (14).
(13). Replace oil evacuated from system as
measured in Step (4).(a). Do not add
more than 5.5 oz (160 cc) total.
Refrigerant, R-134A (C815)
(14). Accurately and carefully meter refriger
ant through refrigerant recovery and
recycling station (T701).
(a). Add 2.5 lb (1.1 kg) R-134A refriger
ant (C815) for a system requiring
R-134A.
(15). Inspect system for leaks with electronic
leak detector (T702).
(16). Repair leaking connection that can be
tightened. Other repairs will require
evacuation of the system.
Use only a qualified mechanic or
pilot to start and operate the en
gines.
(17). Start the right engine (ref. applicable
RFM).
Rotor Blades
(18). Operate the rotorcraft at ground idle.
(19). Set the AC/VENT switch to the COOL
LOW position on the UTILITY PAN
EL.
(a). If the AC compressor does not
operate, refer to the Fault Isolation
Troubleshooting Table 101 (ref.
Section 21-50-00).
(b). A two-second time delay will occur
before the compressor and condenser
fans operate.
(c). The evaporator fan must operate
immediately
NOTE: The ambient temperature must be
equal to or more than 605F (15.55C) to do
this procedure:
(20). With the AC/VENT switch set to the
COOL LOW position and the right
engine in operation at ground idle, do a
check for cool/cold air from the 10 AC
gasper assemblies.
(a). If there is cool/cold air, turn the
AC/VENT switch to OFF and stop
the engine.
CAUTION
CAUTION
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