GECA-SVX01B-EN 31
Operating Pressures
GENERAL: There are many variables (airflow, air temperatures) in an air conditioning system that will affect operating
refrigerant pressures and temperatures. The charts below shows approximate conditions and is based on air flow at
the rated SCFM, entering air at 80.6 °F(DB), 66.2 °F(WB) in cooling, 68 °F(DB) in heating. (+)Heating data with 35 °F
EWT is based on the use of an anti-freeze solution having a freezing point 20 °F lower than the minimum expected
entering temperature.
Table 1: Operating pressures in cooling/heating for unit sizes 006-018
Operating Data
Model
GECA
Entering
Water Temp,
°F
Water
Flow
GPM
Cooling Heating
Suction Pres-
sure,
PSIG
Discharge
Pressure,
PSIG
Water
Temp Rise
°F
Air Temp
Drop
°F DB
Suction
Pressure
PSIG
Discharge
Pressure
PSIG
Water Temp
Drop
°F
Air Temp
Rise
°F DB
60 HZ
006
35° 1.4 38-44 158-204 6-7 15-21
1.8 40-48 162-208 5-6 15-21
45° 1.4 75-85 135-174 13-17 22-28 48-56 170-218 7-9 18-26
1.8 75-85 133-169 10-13 22-28 52-60 173-223 6-7 18-26
55° 1.4 75-85 131-169 12-16 21-27 59-69 183-235 8-10 22-32
1.8 75-85 128-163 10-13 22-28 63-73 186-240 7-8 23-31
68° 1.4 77-87 145-187 11-15 21-27 74-86 200-256 10-12 27-37
1.8 77-87 143-182 9-12 21-27 78-90 204-262 8-10 27-37
75° 1.4 78-88 165-212 11-15 21-27 82-96 207-265 10-13 29-39
1.8 78-88 161-205 9-12 21-27 87-101 212-272 8-11 29-39
86° 1.4 79-89 197-255 11-15 20-26 98-112 223-285 12-15 31-43
1.8 79-89 192-246 9-12 20-26 101-117 226-290 9-12 32-44
95° 1.4 80-90 230-290 11-15 20-26
1.8 80-90 222-282 9-12 20-26
60 HZ
009
50 HZ
006
35° 1.8 41-47 159-205 6-8 18-24
2.3 42-48 162-208 4-6 19-25
45° 1.8 72-82 119-157 12-16 22-28 51-59 171-219 7-9 22-28
2.3 72-82 119-155 8-12 22-28 52-60 173-221 6-8 22-30
55° 1.8 74-84 122-160 11-15 21-27 60-70 181-231 8-10 25-33
2.3 72-84 120-156 8-12 21-27 62-72 182-234 6-8 26-34
68° 1.8 74-86 143-185 11-15 21-27 74-86 194-250 10-12 28-38
2.3 74-86 139-181 9-11 21-27 77-89 197-253 8-10 30-38
75° 1.8 75-87 163-211 11-15 21-27 82-96 202-260 10-14 30-40
2.3 75-87 158-204 9-11 21-27 85-99 205-263 8-10 31-41
86° 1.8 77-89 199-255 11-15 21-27 94-108 212-272 11-15 33-43
2.3 76-88 193-247 8-12 21-27 94-110 214-276 9-11 34-44
95° 1.8 78-90 231-295 11-15 20-26
2.3 77-89 223-285 8-12 20-26
60 HZ
012
50 HZ
009
35° 2.6 46-54 188-232 6-8 24-30
3.3 48-56 191-235 5-7 24-30
45° 2.6 69-79 90-132 10-14 22-28 56-64 200-246 7-9 27-33
3.3 68-80 87-127 8-12 22-28 58-66 202-248 6-8 27-35
55° 2.6 69-81 115-151 10-14 22-28 67-75 208-258 8-10 29-37
3.3 70-80 111-147 8-12 22-28 67-77 210-260 7-9 30-38
68° 2.6 70-82 143-187 10-14 21-27 73-83 214-264 9-11 31-39
3.3 70-82 139-181 8-12 21-27 74-84 216-268 7-9 32-40
75° 2.6 71-83 160-208 10-14 21-27 78-88 221-273 9-11 33-41
3.3 71-83 155-203 8-12 21-27 81-93 226-278 7-9 33-43
86° 2.6 72-84 189-245 10-14 20-26 91-101 236-290 10-14 37-45
3.3 72-84 184-238 8-12 20-26 96-108 242-296 8-10 37-47
95° 2.6 74-86 214-278 10-14 20-26
3.3 73-85 207-271 9-11 20-26
60 HZ
015
50 HZ
012
35° 2.9 36-42 159-205 5-7 18-24
3.6 37-45 160-224 4-6 20-26
45° 2.9 72-82 114-146 12-16 23-29 45-53 169-217 6-8 21-29
3.6 71-83 109-141 10-14 23-29 47-55 171-221 5-7 23-29
55° 2.9 73-83 124-160 11-15 22-28 52-62 177-231 7-9 24-32
3.6 72-84 120-154 10-12 22-28 55-65 181-235 6-8 25-33
68° 2.9 73-85 155-197 11-15 22-28 63-75 190-248 7-11 28-36
3.6 73-85 150-190 8-12 22-28 67-79 195-253 7-9 29-37
75° 2.9 74-86 173-219 11-15 21-27 71-83 199-257 9-11 29-39
3.6 74-86 168-212 8-12 21-27 75-87 203-263 8-10 31-39
86° 2.9 75-87 202-258 11-15 21-27 81-95 212-272 11-13 33-43
3.6 75-87 196-250 9-11 21-27 87-101 218-278 9-11 34-44
95° 2.9 76-88 229-293 11-15 20-26
3.6 76-88 221-283 9-11 21-27
Sequence of
Operation
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