Table of Contents
Advertisement
FORM 160.67-O2
ISSUE DATE: 10/9/2020
RENEWAL PARTS
For any required Renewal Parts, refer to YORK Renew-
al Parts Unit Components Manual 160.67-RP1.
CHECKING SYSTEM FOR LEAKS
Leak Testing During Operation
The refrigerant side of the system is carefully pressure
tested and evacuated at the factory.
After the system has been charged, the system should
be carefully leak tested with a R-134a compatible leak
detector to be sure all joints are tight.
If any leaks are indicated, they must be repaired im-
mediately. Usually, leaks can be stopped by tighten-
ing flare nuts or flange bolts. However, for any major
repair, the refrigerant charge must be removed. (See
Handling Refrigerant For Dismantling And Repairs on
page 76 in this Section.)
TABLE 4 - SYSTEM PRESSURES
*Gauge
Inches of Mercury
(HG) Below One
Standard Atmosphere
0
10.24"
22.05"
25.98"
27.95"
28.94"
29.53"
29.67"
29.72"
29.842"
29.882"
29.901"
29.917"
29.919"
29.9206"
29.921"
*One standard atmosphere = 14.696 PSIA
= 760 mm Hg. absolute pressure at 32°F
= 29.921 inches Hg. absolute at 32°F
JOHNSON CONTROLS
SECTION 6 - MAINTENANCE
Absolute
Millimeters of Mercury
PSIA
(HG)
14.696
760.
9.629
500.
3.865
200.
1.935
100.
.968
50.
.481
25.
.192
10.
.122
6.3
.099
5.
.039
2.
.019
1.0
.010
.5
.002
.1
.001
.05
.0002
.01
0
0
EVACUATION AND DEHYDRATION OF UNIT
VACUUM PUMP
CONNECT TO GAUGE
CONNECTION ON THE
CONDENSER
OR EVAPORATOR
FIGURE 18 - EVACUATION OF CHILLER
Microns
760,000
500,000
200,000
100,000
50,000
25,000
10,000
6,300
5,000
2,000
1,000
500
100
50
10
0
NOTES: PSIG = Lbs. per sq. in. gauge pressure
= Pressure above atmosphere
PSIA = Lbs. per sq. in. absolute pressure
= Sum of gauge plus atmospheric pressure
COMPRESSOR
OIL COOLER
THERMISTOR
VACUUM GAUGE
LD09698
Boiling Temperatures of
Water °F
212
192
151
124
101
78
52
40
35
15
+1
-11
-38
-50
-70
73
6
Advertisement
Table of Contents
