Figure 48 - Evacuation Of Chiller; Table 14 - System Pressures - York YZ MODEL A Operation And Maintenance Manual

SECTION 5 - MAINTENANCE

TABLE 14 - SYSTEM PRESSURES

*GAUGE
INCHES OF MERCURY
(HG) BELOW ONE
STANDARD
ATMOSPHERE
0"
10.240"
22.050"
25.980"
27.950"
28.940"
29.530"
29.670"
29.720"
29.842"
29.882"
29.901"
29.917"
29.919"
29.9206"
29.921"
*One standard atmosphere
CHARGING VALVE
WET BUBL TEMPERATURE
INDICATOR OR
VACUUM GAUGE

FIGURE 48 - EVACUATION OF CHILLER

122
MILLIMETERS
PSIA OF MERCURY
14.6960
9.6290
3.8650
1.9350
0.9680
0.4810
0.1920
0.1220
0.0990
0.0390
0.0190
0.0100
0.0020
0.0010
0.0002
0
= 14.696 PSIA
= 760 mm Hg. absolute pressure at 32°F
= 29.921 inches Hg. absolute at 32°F
ABSOLUTE
MICRONS
(HG)
760.00 760,000
500.00 500,000
200.00 200,000
100.00 100,000
50.00 50,000
25.00 25,000
10.00 10,000
6.30 6,300
5.00 5,000
2.00 2,000
1.00 1,000
0.50
0.10
0.05
0.01
0
NOTES:
STOP VALVE
VACUUM PUMP
FORM 161.01-OM1
ISSUE DATE: 6/8/2018
BOILING
TEMPERATURES
OF WATER °F
212
192
151
124
101
78
52
40
35
15
1
500 –11
100 –38
50 –50
10 –70
0
PSIG = Lbs. per sq. in. gauge pressure
= Pressure above atmosphere
PSIA = Lbs. per sq. in. absolute pressure
= Sum of gauge plus atmospheric
pressure
JOHNSON CONTROLS
Water
Freezes
LD26725