Page 18
B−12GCS
For maximum performance of this cooling system, the
operating temperatures and pressure should be checked
and superheat determined at Standard ARI test conditions
of 82_ F outdoor temperature − 80_F indoor dry bulb / 67_F
indoor wet bulb. If superheat measured deviates from
values in table 9, refrigerant charge should be adjusted
accordingly for maximum performance.
Verify system performance using table 10 as a general
guide. Table should not be used for charging unit. Minor
variations in these pressures may be expected due to differ-
ences in installations. Significant differences could mean
that the system is not properly charged or that a problem ex-
ists with some component in the system. Used carefully,
this table could serve as a useful service guide. Data in
table 10 is based on 80°F dry bulb / 87°F wet bulb return air.
Allow unit operation to stabilize before taking pressure
readings.
TABLE 9
12GCS SUCTION SUPERHEAT TABLE
UNIT MODEL NO.
SUCTION SUPERHEAT
82_F OD − 80_F IDDB
/ 67_F IDWB
12GCS−024 18 − 20_
12GCS−030 18 − 20_
12GCS−036 13 − 15_
12GCS−042 13 − 15_
12GCS−048, −060 14 − 16_
TABLE 10
NORMAL OPERATING PRESSURES
80°F db / 67°F wb RETURN AIR AIR TEMPERATURE ENTERING OUTDOOR COIL (°F)
MODEL PRESSURE 65° 70° 75° 80° 82° 85° 90° 95° 100° 105° 110° 115°
12GCS−024 75 77 80 82 83 84 87 88 90 90 91 92
12GCS−030 67 70 73 76 80 78 82 85 86 86 87 88
12GCS−036
73 75 78 80 82 82 85 87 88 89 91 92
12GCS−042
77 78 80 81 81 82 84 85 87 88 89 90
12GCS−048 71 74 75 79 81 81 84 88 87 87 88 89
12GCS−060 74 77 80 81 82 84 85 88 96 96 87 88
12GCS−024 149 164 178 193 195 208 222 237 254 271 289 306
12GCS−030 145 161 178 192 195 207 223 238 254 270 288 305
12GCS−036
156 172 187 203 207 219 234 260 267 284 303 322
12GCS−042
159 175 190 208 209 222 237 253 270 298 306 326
12GCS−048 152 168 185 198 209 215 230 246 254 281 298 316
12GCS−060 155 190 205 211 215 230 244 269 276 293 311 332
To Next Page
Loading...
