Pontiac Fiero 1988 Service Manual page 52

AIR CONDITIONING 1B-7
1 - NO B L O W E R O P E R A T I O N W I T H M O D E L E V E R I N
" O F F " P O S I T I O N
2 - I N T H I S M O D E L E V E R P O S I T I O N , M A X I M U M
C O O L I N G I F O F F E R E D W I T H T H E C O N D I T I O N E D
A I R D I S T R I B U T E D T H R O U G H I.P. O U T L E T A N D
S L I G H T A M O U N T T O F L O O R A T A N Y B L O W E R
S P E E D
3 - C O N D I T I O N E D A I R IS D I R E C T E D T H R O U G H I.P.
A N D F L O O R D I S T R I B U T O R O U T L E T S W I T H
S O M E A L S O T O W I N D S H I E L D
4 - C O N D I T I O N E D A I R IS D I R E C T E D T H R O U G H I.P.
A N D F L O O R D I S T R I B U T O R O U T L E T S W I T H
S O M E A L S O T O W I N D S H I E L D
5 - A N O N - C O M P R E S S O R O P E R A T I N G P O S I T I O N ,
W I T H O U T S I D E A I R D E L I V E R E D T H R O U G H
I.P. O U T L E T S
6 - A N O N - C O M P R E S S O R O P E R A T I N G P O S I T I O N
W I T H O U T S I D E A I R D I S T R I B U T E D A B O U T 8 0 %
T O F L O O R ( A N D 2 0 % T O W I N D S H I E L D A N D
S I D E W I N D O W S - S O M E M O D E L S )
7 - C O N D I T I O N E D A I R D I S T R I B U T E D A B O U T 8 0 %
T O W I N D S H I E L D A N D S I D E W I N D O W S , A N D
2 0 % T O F L O O R
8 - T E M P E R A T U R E L E V E R P O S I T I O N R E G U L A T E S
T E M P E R A T U R E O F T H E A I R E N T E R I N G T H E
P A S S E N G E R C O M P A R T M E N T B Y C A B L E
O P E R A T I O N O F T H E H E A T E R C O R E
T E M P E R A T U R E D O O R
9 - V A C U U M O P E R A T E D S Y S T E M S E L E C T O R ( M O D E )
L E V E R
1 0 - F A N C O N T R O L ( D E S I G N V A R I E S W I T H M O D E L )
520252-1 B
Figure 5 A/C Controller — Typical
REFRIGERANT — 12
PRESSURE — TEMPERATURE
RELATIONSHIP
The table below indicates the pressure of Refri-
gerant — 12 at various temperatures. For in-
stance, a drum of Refrigerant at a temperature
of 8 0 > F (26.6°C) will have a pressure of 84.1 PSI
(579.9 kPa). If it is heated to 125°F ( 5 1 . ^ 0 , the
pressure will increase to 167.5 PSI (1154.9
kPa). It also can be used conversely to deter-
mine the temperature at which Refrigerant —
12 boils under various pressures. For example,
at a pressure of 30.1 PSI (207.5 kPa), Refriger-
ant — 12 boils at 32° F (OX).
f P ) f O
(PSIGMkPa)
f W C )
(PSIGMkPa)
21.7 - 29.8C ©(ATMOSPHERIC O(kPa)
55 12.7C 52.0 358.5
P R E S S U R E ) 60 15.5C
57.7 397.8
20 - 28.8C 2.4 16.5
65 18.3C 63.7 429.2
10 - 23.3C
4.5
31.0 70 21.1C
70.1 482.7
5 - 2 0 . 5 C 6.8 46.9
75 23.8C 76.9 530.2
0 - 1 7 . 7 C 9.2 63.4 80 26.6C
84.1 579.9
5 - 15.0C 11.8 81.4
85 29.4C 91.7 632.3
10
- 12.2C
14.7
101.4 90 32.2C
99.6 686.7
15 - 9.4C 17.7 122.0
95 35.0C 108.1 745.3
20
- 6.6C
21.1
145.5 100 37.7C
116.9 806.0
25 - 3.8C 24.6 169.6
105 40.5C 126.2 870.2
30 - 1.1C 28.5 196.5 110 43.3C 136.0 937.7
32 OC 30.1 207.5
115 46.1C 146.5 1010.1
35 1.6C 32.6 224.8 120 48.8C
157.1 1083.2
40 4.4C 37.0 255.1
125 51.6C 167.5 1154.9
45
7.2C
41.7
287.5 130 54.4C
179.0 1234.2
50 10.0C 46.7 322.0
140 60.0C 204.5 1410.0
Figure 6 Pressure-Ternperature Relationship of R-12