Mazda 1996 626, Руководство по обслуживанию

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HEATER AND REFRIGERANT SYSTEM
Performance Test
After finishing repairs, conduct a performance test of the
refrigerant system as follows:
1. Connect the manifold gauge set.
(Refer to page G-45.)
2. Start the engine and run it at 1,500 rpm.
3. Turn the FRESH switch on.
4. Operate the air conditioner at maximum cooling.
5. Close the front windows and the hood.
6. Place a dry-bulb thermometer in the center ventilator
outlet.
7. Place a dry-and-wet thermometer close to the blower
inlet.
8. Wait until the air conditioner outlet temperature stabi­
lizes. If the high-pressure-side becomes too high, pour
cool water on the condenser. If it is too low, cover the
front of the condenser.
Stable condition
Blower inlet temperature: 25—35 °C {77—95 °F}
High-pressure side: 1,230—1,610 kPa{12.5—16.5
kgf/cm2, 178—234 psi}
9. After the air conditioner stabilizes, read the dry-and-wet
thermometer at the air inlet.
10. Calculate the relative humidity from the chart below by
comparing the wet-and-dry-bulb readings.
HOW TO READ THE GRAPH:
A fter m easuring the te m peratures of w et- and dry-bulb
therm om eter at the b low er inlet, relative hum idity (%)
can be obtained
Exam ple Supposing dry- and w et-bulb te m peratures at
the blow er inlet are 25 °C {77.0 °F} and 19 5 °C {67 1 °F},
respectively, the point of intersection of the dotted lines
in the graph is 60 %.
■ • i 2 i 4 s i r i ♦ io l i n n " i i i * u u i i n n J i u i v
11
z ; j i n » n ) i ) J ) * J i i t j m i j i «
2 3 0 2 « 6 30 2 33 8 3 7 * 0 *8 2 5 1 6 5 5 * 59 0 M S 6 9 8 73 4 7 7 0 8 0 6 W .2 87 8 91 * 95 0 » 6 102 \
24 A 2 8 4 32 0 1 5 8 3 9 2 42 8 46 4 $ 0 0 S3 6 57 2 0 0 8 $4 4 M O 71 « 75 2 79.8 83 4 84 0 89.6 93 2 94 8 100 104 /
ORY 0U L8 TEMPERATURE *C |* F |
11. Read the dry thermometer at the air outlet, and calcu­
late the difference between the inlet dry-bulb and the
outlet dry-bulb temperatures.
12. Verify that the intersection of the relative humidity and
temperature difference is in the shaded zone.
G -4 7