Mazda B-Series, Training Manual

Page: 105 / 146

HVAC Basic System
Basic System
Features
•
The HVAC ( H eating, V entilation, A ir C onditioning) basic system of the BT-50 has the
following new features:
–
Modified blower unit to reduce fan noise
–
Condenser with sub-cooling function and integrated receiver / drier
Specifications
kW
kW
g
ml
rpm
ml
mm
Fusible plug Melting point °C
kW
ml
W
W
Type
High 390 - 790 2940 - 3340
Low 176 - 216 20 or less
ON OFF
BT-50_T07001
Blower motor
Operating
pressure kPa
Condition
1.0 +/- 0.6
Refrigerant
pressure
switch
Evaporator
temperature
sensor
OFF Condition
Evaporator
temperature
Magnetic clutch
control
ON
3.0 +/- 0.6
Item
Regular amount approx.
Refrigerant
Type
Heating capacity
Cooling capacity
Specification
R-134a
7,000
475
Swash plate
154
4.86
4.012
Sirocco
FD46XG
180
Multiflow (sub-cooling type)
Single tank drawn cup
220
48
Reheat full air mix type
Expansion valve
10.46
220
Synthetic zeolite
Internal regulating type Type
Electrical consumption (during
A/C operation)
Evaporator
Magnetic clutch
Type
Blower motor
Temperature control
PAG oil type
Condenser
Radiated heat
Receiver/drier capacity
Desiccant
Type
Sealed volume
°C
A/C compressor
102-107
Type
Lubrication
Discharge capacity
Max. allowable speed
Magnetic clutch clearance 0.35-0.75
Service Training BT-50 07-1