8
UNIT OPERATING CONDITIONS
NOTE: Table 1 include the following notes:
• Airflow is at nominal (rated) conditions;
• Entering air is based upon 70°F (1°C) DB in heating
and 80/67°F (7/1°C) in cooling;
• Subcooling is based upon head pressure at compressor
service port;
• HC series units have cap tube expansion devices:
• Cooling air and water values can vary greatly with
changes in humidity level.
Table 13: HC Series Typical Unit Operating Pressures and Temperatures
Cooling
Heating
Entering
Water
Suction
Discharge
Water
Air
Suction
Discharge
Water
Air
Water
Flow
Pressure
Pressure
Super-
Sub-
Temp
Temp
Pressure
Pressure
Super-
Sub-
Temp
Temp
Temp
°
F
GPM/ton
PSIG
PSIG
heat
cooling
Rise
°
F
Drop
°
F DB
PSIG
PSIG
heat
cooling
Drop
°
F DB
Rise
°
F
1.5
66-75
160-10
10-0
6-16
0-
0-5
60-70
05-0
10-18
1-5
1.1-14
-
60
.
65-75
145-175
15-5
8-18
1-15
0-5
6-7
10-8
10-18
1-5
7.-.0
4-0
.0
64-74
10-160
0-0
10-0
8-1
0-5
65-75
15-4
10-18
1-5
5.8-6.
5-1
1.5
71-8
00-0
10-0
6-16
1-
1-4
66-7
05-0
15-5
-8
14.0-15.
8-4
70
.
70-80
185-15
15-5
8-18
1-17
1-4
68-74
10-8
15-5
-8
.0-10.
0-7
.0
6-7
175-05
0-0
10-0
7-1
1-4
70-76
15-4
15-5
-8
6.7-7.
1-8
1.5
75-85
0-60
10-16
5-1
1-
18-
68-74
05-0
0-5
-10
14.-15.
-
80
.
74-84
15-45
1-0
7-14
1-17
18-
70-76
10-8
0-5
-10
.-11.1
-41
.0
7-8
00-0
15-5
8-15
7-1
18-
7-76
15-4
0-5
-10
6.-8.1
5-4
1.5
7-0
60-0
-8
1-8
18-1
17-
90
.
77-88
45-75
5-1
-
10-14
17-
.0
75-87
0-60
8-16
-10
6-11
17-
