Figure 47 - Evacuation Of Chiller; Table 14 - System Pressures - York YMC2 Operation And Maintenance

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 BULB TEMPERATURE
INDICATOR OR VACUUM
GAUGE

FIGURE 47 - EVACUATION OF CHILLER

126
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
0.50 500
0.10 100
0.05
0.01
0
NOTES:
STOP VALVE
VACUUM PUMP
FORM 160.84-OM1
ISSUE DATE: 9/21/2017
BOILING
TEMPERATURES
OF WATER °F
212
192
151
124
101
78
52
40
35
15
1
–11
–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
LD00949a