2002 MAZDA 6 Workshop Manual Suplement

U–2
OUTLINE
OUTLINE OF CONSTRUCTIONA6E850201038201•The construction and operation of the air conditioner system is essentially carried over from that of the previous
Mazda6 (GG) model, except for the following features. (See Mazda6 Training Manual 3359-1*-02C.)
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FEATURESA6E850201038202Improved Comfort
•The water heater system has been adopted. (For MZR-CD (RF Turbo) European (L.H.D.) specs.)
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SPECIFICATIONSA6E850201038203Manual Air Conditioner
OUTLINE
ItemSpecification
L3, L8, LF MZR-CD (RF Turbo)
Heating capacity (kW {kcal/h}) 4.400 {3,784}4.400 {3,784} (L.H.D.)
5.120 {4,403} (R.H.D.)
Airflow volume
(during heater operation)Blower motor
(m
3/h)310 (L.H.D.)
300 (R.H.D.)
Electricity consumption
(during heater operation)Blower motor (W) 184
Cooling capacity (kW {kcal/h}) 4.200 {3,612}
Airflow volume (during air
conditioner operation)Blower motor
(m
3/h)460
Electricity consumption
(during air conditioner
operation)Blower motor (W) 225
Magnetic clutch (W) 46 45
Fan type Blower motor Sirocco fan
RefrigerantType R-134a
Regular amount
(approximate quantity)470 {16.6} (L.H.D.)
430 {15.2} (R.H.D.)
(g {oz})
A/C compressorType Vane-rotary
Discharge capacity
120 {120, 4.06}
(ml {cc, fl oz})
Max. allowable speed
6,400
(rpm)
Lube
oilType ATMOS GU10
Sealed volume
(approximate quantity)
120 {120, 4.06} 150 {150, 5.07}
(ml {cc, fl oz})
Magnetic clutch clearance
0.3—0.5 {0.012—0.019}
(mm {in})
CondenserType Multiflow (sub-cooling type)
Radiated heat (kW {kcal/h})4.69 {4,030}: European (L.H.D.) specs.
5.96 {5,130}: European (U.K.), GCC specs.
Receiver/drier
capacity(ml {cc, fl oz}) 190 {190, 6.42}
Desiccant Synthetic zeolite
Expansion valve Type Block type
Evaporator Type Double-tank drawn cup

OUTLINE
U–3
U
Bold frames: New specification
Refrigerant pressure
switchType Dual-pressure: General area
Operating pressure
(MPa {kgf/cm
2, psi})
TypeTriple-pressure: L3 engine,
intensely hot area
– Operating pressure
(MPa {kgf/cm
2, psi})
Thermal protectorType Bimetallic (Indirect sensing type)
Operating temperature
(°C {°F})
Temperature control Reheat full air mix typeItemSpecification
L3, L8, LF MZR-CD (RF Turbo)
ON
OFF0.166—0.226
{1.693—2.304,
24.08—32.77}2.94—3.34
{30.0—34.0,
427—483}
0.02
{0.20, 2.84}
or less0.39—0.79
{3.98—8.05,
56.6—114}
0.195—0.250
{1.989—2.549, 28.30—36.24}
ON
OFF
ON
OFF  HI and LO pressure switch
 Middle pressure switch0.176—0.216
{1.795—2.202,
25.53—31.31}2.94—3.34
{30.0—34.0,
427—483}
0.02 {0.20,
2.84} or less0.39—0.79
{3.98—8.05,
56.6—114}
0.195—0.250 {1.989—2.549,
28.30—36.24}
1.08—1.38
{11.1—14.0, 158—199}
1.39—1.65
{14.2—16.8,
202—238}
ON
OFF145—155
{293—311}:
European
(L.H.D. U.K.)
specs.
150—155
{302—311}:
GCC specs.
123—137 {254—278}
ON
OFF135—145
{275—293}
113—127 {236—260}

U–4
OUTLINE
Full-auto Air Conditioner
ItemSpecification
L3, L8, LF MZR-CD (RF Turbo)
Heating capacity (kW {kcal/h}) 4.400 {3,784}4.400 {3,784} (L.H.D.)
5.120 {4,403} {R.H.D.)
Airflow volume
(during heater operation)Blower motor
(m
3/h)310 (L.H.D.)
300 (R.H.D.)
Electricity consumption
(during heater operation)Blower motor (W) 184
Cooling capacity (kW {kcal/h}) 4.200 {3,612}
Airflow volume (during air
conditioner operation)Blower motor
(m
3/h)460
Electricity consumption
(during air conditioner
operation)Blower motor (W) 225
Magnetic clutch (W) 46 45
Fan type Blower motor Sirocco fan
RefrigerantType R-134a
Regular amount
(approximate quantity)470 {16.6} (L.H.D.)
430 {15.2} (R.H.D.)
(g {oz})
A/C compressorType Vane-rotary
Discharge capacity
120 {120, 4.06}
(ml {cc, fl oz})
Max. allowable speed
6,400
(rpm)
Lube
oilType ATMOS GU10
Sealed volume
(approximate quantity)
120 {120, 4.06} 150 {150, 5.07}
(ml {cc, fl oz})
Magnetic clutch clearance
0.3—0.5 {0.012—0.019}
(mm {in})
CondenserType Multiflow (sub-cooling type)
Radiated heat (kW {kcal/h})4.69 {4,030}: European (L.H.D.) specs.
5.96 {5,130}: European (U.K.), GCC specs.
Receiver/drier
capacity(ml {cc, fl oz}) 190 {190, 6.42}
Desiccant Synthetic zeolite
Expansion valve Type Block type
Evaporator Type Double-tank drawn cup

OUTLINE
U–5
U
Bold frames: New specificationEnd Of Sie
Refrigerant pressure
switchType Dual-pressure: General area
Operating pressure
(MPa {kgf/cm
2, psi})
TypeTriple-pressure: L3 engine,
intensely hot area
– Operating pressure
(MPa {kgf/cm
2, psi})
Thermal protectorType Bimetallic (Indirect sensing type)
Operating temperature
(°C {°F})
SensorSolar radiation sensor Photodiode
Ambient temperature sensor
Thermistor Cabin temperature sensor
Evaporator temperature
sensor
Water temperature sensor
ActuatorAir intake actuator Sliding contact type
Air mix actuator, airflow mode
actuatorPotentiometer type
Temperature control Reheat full air mix typeItemSpecification
L3, L8, LF MZR-CD (RF Turbo)
ON
OFF0.166—0.226
{1.693—2.304,
24.08—32.77}2.94—3.34
{30.0—34.0,
427—483}
0.02
{0.20, 2.84}
or less0.39—0.79
{3.98—8.05,
56.6—114}
0.195—0.250
{1.989—2.549, 28.30—36.24}
ON
OFF
ON
OFF  HI and LO pressure switch
 Middle pressure switch0.176—0.216
{1.795—2.202,
25.53—31.31}2.94—3.34
{30.0—34.0,
427—483}
0.02 {0.20,
2.84} or less0.39—0.79
{3.98—8.05,
56.6—114}
0.195—0.250 {1.989—2.549,
28.30—36.24}
1.08—1.38
{11.1—14.0, 158—199}
1.39—1.65
{14.2—16.8,
202—238}
ON
OFF145—155
{293—311}:
European
(L.H.D. U.K.)
specs.
150—155
{302—311}:
GCC specs.
123—137 {254—278}
ON
OFF135—145
{275—293}
113—127 {236—260}

U–6
CONTROL SYSTEM
WATER HEATER SYSTEMA6E854000169201Outline
•The function, structure and operation of the water heater system is essentially carried over from that of the
current MPV (LW) model, except for following:
—Full/half switching temperature has been changed.
Structural View
.
Operation
Full/half switching
•Depending on the engine coolant temperature, the CPU sets the flame to either full or half strength settings.
.
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CONTROL SYSTEM
1
2
A6E85402002
1 Water heater unit2 Fuel pump (water heater system)
3
1
2
68
{154}74
{165}75
{167}78
{172}˚C
{˚F}
A6E85402003
1 Full mode
2 Half mode3 Idle mode

OUTLINE
U–7
U
SUPPLEMENTAL SERVICE INFORMATIONA6E850201038204•The following additions have been made for the MZR-CD (RF Turbo) since the publication of the Mazda6
Workshop Manual (1730-1*-02C).
A/C unit
•Removal/installation procedure has been modified.
A/C compressor
•Removal/installation procedure has been modified.
Condenser
•Removal/installation procedure has been modified.
Refrigerant lines
•Removal/installation procedure has been modified.
Water heater unit
•Removal/installation procedure has been added.
Fuel pump (water heater system)
•Inspection procedure has been added.
Climate control unit
•Inspection procedure has been modified.
Water heater system
•On-board diagnostic system has been added.
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OUTLINE

U–8
LOCATION INDEX
BASIC SYSTEMA6E850001040201
.
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LOCATION INDEX
8
75
4
3
1
2
6
4
L.H.D.
A6E85002001
8
7
5
43
1
2
6
4
R.H.D.
A6E85002002
1 Blower unit
2 Air filter
3A/C unit
(See U–10 A/C UNIT REMOVAL/INSTALLATION)
4 Rear heat duct
5 A/C compressor
(See U–11 A/C COMPRESSOR REMOVAL/
INSTALLATION)6 Condenser
(See U–12 CONDENSER REMOVAL/
INSTALLATION)
7Heater hose
8 Refrigerant lines
(See U–13 REFRIGERANT LINES REMOVAL/
INSTALLATION)

LOCATION INDEX
U–9
U
CONTROL SYSTEMA6E850001040202
.
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1
2
3
A6E85002003
1 Water heater unit
(See U–15 WATER HEATER UNIT REMOVAL/
INSTALLATION)
2 Fuel pump (water heater system)
(See U–16 FUEL PUMP (WATER HEATER
SYSTEM) INSPECTION)3 Climate control unit
(See U–16 CLIMATE CONTROL UNIT
INSPECTION)