Maintenance Practices; Environmental Control System (Ecs); Air-Conditioning (Ac) Servicing Precautions; Ac System Servicing (Early Config) - MD Helicopters MD Explorer Servicing And Maintenance

1. Environmental Control System (ECS)

A. Air−Conditioning (AC) Servicing
Precautions
Failure to follow air-condi­
WARNING
tioning system servicing
precautions can result in injury to per­
sonnel and/or damage to rotorcraft.
Failure to follow the servicing
CAUTION
procedures can have an effect on
the rotorcraft warranty.
Oil, Daphne Hermetic (R12) (C116)
Oil, Daphne Hermetic (R-134A) (C117)
Do not mix daphne hermetic oil
CAUTION
(C116) and daphne hermetic oil
(C117). Damage to the system can occur.
Refrigerant, R12 (C806)
Refrigerant, R-134A (C815)
Do not mix R12 refrigerant
CAUTION
(C806) and R-134A refrigerant
(C815). Damage to the system can occur.
(1). Make sure of the System R number
before AC system servicing.
(2). Always fill refrigerant vapor into
high-pressure (discharge) side of
system.
MD Helicopters, Inc.
Rotorcraft Maintenance Manual
SERVICING

MAINTENANCE PRACTICES

(3). Before servicing, all grease, oil, or other
foreign material must be cleaned from
the exterior surfaces of components.
(4). Do not let unwanted materials (dirt,
sand, contamination) or moisture get in
the system.
(5). The receiver dehydrator must be
replaced each time the AC system is
opened.
B. AC System Servicing (EARLY CONFIG)
(Ref. Figure 201)
Consumable Materials
(Ref. CSP−SPM)
Item Nomenclature
C116 Oil, Daphne Hermetic (R12)
C806 Refrigerant, R12
Special Tools
(Ref. CSP−SPM)
Item Nomenclature
T701 Refrigerant Recovery and Recycling
Station
T702 Electronic Leak Detector
Make sure the personnel that
CAUTION
maintain and service the air-
conditioning system have the necessary
education and experience. The system has
complex and specialized components that
require specific knowledge.
Failure
CAUTION
manufacturers recovery and re­
cycling station servicing requirements and
management of refrigerants, can result in
damage to the air-conditioning system.
NOTE:
Obey all government and local regula­
tions with you fill and evacuate the AC sys­
tems with refrigerant substances.
(1). Remove Access Panel R210 (ref. Section
53-30-00).
(2). Remove caps (1, 2) from service ports
(Schrader valve) on compressor.
12-00-00
CSP−900RMM−2
to comply with
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Revision 34