28
UNIT OPERATING CONDITIONS
NOTE: Table 13 include the following notes:
• Airflow is at nominal (rated) conditions;
• Entering air is based upon 70°F (21°C) DB in heating
and 80/67°F (27/19°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 66-75 160-190 10-20 6-16 20-23 20-25 60-70 205-230 10-18 1-5 12.1-14 23-29
60 2.3 65-75 145-175 15-25 8-18 12-15 20-25 63-73 210-238 10-18 1-5 7.2-9.0 24-30
3.0 64-74 130-160 20-30 10-20 8-12 20-25 65-75 215-242 10-18 1-5 5.8-6.9 25-31
1.5 71-82 200-230 10-20 6-16 19-22 19-24 66-72 205-230 15-25 2-8 14.0-15.2 28-34
70 2.3 70-80 185-215 15-25 8-18 12-17 19-24 68-74 210-238 15-25 2-8 9.0-10.2 30-37
3.0 69-79 175-205 20-30 10-20 7-12 19-24 70-76 215-242 15-25 2-8 6.7-7.9 31-38
1.5 75-85 230-260 10-16 5-12 19-22 18-23 68-74 205-230 20-35 2-10 14.2-15.9 32-39
80 2.3 74-84 215-245 13-20 7-14 12-17 18-23 70-76 210-238 20-35 2-10 9.9-11.1 33-41
3.0 72-82 200-230 15-25 8-15 7-12 18-23 72-76 215-242 20-35 2-10 6.9-8.1 35-42
1.5 79-90 260-290 2-8 1-8 18-21 17-23
90 2.3 77-88 245-275 5-12 2-9 10-14 17-23
3.0 75-87 230-260 8-16 3-10 6-11 17-23
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