Mazda CX-9 Grand Touring 2009 Manual page 1732

limited to the piping, etc., provided that said parts are serviced/repaired in accordance with
standard procedure.
When serviced/repaired A/C units in locations where there is a considerable risk of contamination
from dirt or dust, plug up the openings on the parts to prevent dust/dirt from entering.
When using adhesive material to cover openings on A/C parts, make sure that the adhesive side of
the material does not come in contact with the connectors on the parts.
When the system is opened to atmosphere, there is no need to replace the condenser, or the receiver
dryer when it is housed within the condenser, provided that the unit is plugged accordingly.
HANDLING COMPRESSOR OIL
Use only DENSO OIL8 compressor oil for this vehicle. Using a PAG oil other than DENSO OIL8
compressor oil can damage the A/C compressor.
Do not spill DENSO OIL8 compressor oil on the vehicle. A drop of compressor oil on the vehicle
surface can eat away at the paint. If oil gets on the vehicle, wipe it off immediately.
DENSO OIL8 compressor oil (PAG oil) has a higher moisture absorption efficiency than the
previously used mineral oil. If moisture mixes with the compressor oil, the refrigerant system could
be damaged. Therefore, install caps immediately after using the compressor oil or removing
refrigerant system parts to prevent moisture absorption.
Fig. 1: DENSO OIL8 Compressor Oil Moisture Absorption Graph
Courtesy of MAZDA MOTORS CORP.
REFRIGERANT SYSTEM GENERAL PROCEDURES
MANIFOLD GAUGE SET INSTALLATION
1. Fully close the valves of the manifold gauge.
2. Connect the charging hoses to the high and low-pressure side joints of the manifold gauge.
3. Connect the quick couplers to the ends of the charging hoses.
4. Connect the quick couplers to the charging valves.
2008 Mazda CX-9 Grand Touring
2008 HVAC Refrigerant System - Mazda CX-9