Carrier 48GH - Manual (Page 13)

Table 5 Refrigerant (R-22) Charge
Check Charts
m
EVAPORATOR
MODEL CONDENSER AIR INLI
48
AIR INLET ... '-1 _ ------j
WET BULB (F) 65 70 75 80 85
55 138 156 174 192 211
60 143 161 178 196 213
GL018 65 148 165 182 199 216
70 153 169 186 202 219
75 158 174 190 206 222
55 157 170 183 197 210
60 158 172 185 198 212
GL024 65 160 173 187 200 214
70 161 175 189 202 217
75 163 177 191 205 220
55 148 163 178 193 208
60 150 165 181 195 211
GH024 65 151 167* 182 197 213
70 153 169 184 199 215
75 155 171 186 202 217
55 163 178 193 208 220
60 165 180 195 210 223
GLO30,
65 16/ 1HV 197^ 22H
GH030
70 1by 184 199 214 229
75 171 186 216 232
55 172 186 200 214 229
60 175 190 204 218 233
GL036 65 178 193 208 222 238
70 182 197 212 226 241
75 185 200 215 230 245
55 168 182 196^ 209 223
60 171 185 199 213 228
GH036 65 173 188 203 217 233
70 175 191 206 221 237
75 176 193 209 225 242
55 177 192 208 224 239
GL042.
60 180 195 211 227 243
65 183 198 214 230 2"47
GH042
70 186 2U1 217 233 251
75 189 204 220 236 255
55 171 182 193 204 216
60 176 188 200 211 224
65 181 193 206 218 232
70 185 197 210 223 238
75 188 201 215 228 243
55 173 190 204 219 236
60 175 192 207 223 240
65 177 194 210 227 244
GHO 60
70 1 /9 19b 213 231 248
75 181 198 216 235 252
229
2 II
233
23 ^ 5 '
238
223
225
228
232
235 “
224
226
228
2 IЦ
23’2
235
238
244 '
■ 247 '
244_
248~
252
256
260
238
243
”248
253
258
253
258
263
2^.
273
228
237
245
252
”258
2_51
256
'|66
2 О 1
95
247
100
265
249 266
251 268
252 269
254 270
238 253
240 255
243 259
247 262
251 267
239 254
241 256
243 258
245 261
247 263
247 262
251 ^266
255
270
259 274
263 276
260 274
264 278
268 282
271 286
275 290
253 268
259 276
266 283
271 288
275 292
269 285
274 290
279 295
284 300
289 305
242 257
251 265
258 274
267 282
274 291
266 280
272 287
278 294
284 301
290 308
«
5. Evaluate system performance and refrigerant
charge by comparing recorded readings with
operating pressure/temperature tag.
6. Make slight adjustment to refrigerant charge
when necessary.
NOTE: If problem causing inaccurate readings is
a refrigerant leak, see Unit Preparation — RE­
FRIGERANT LEAKS.
INDOOR AIRFLOW AND AIRFLOW AD­
JUSTMENTS — Models 48GH/GL have direct-
drive
blower motors. All motors are factory
connected to deliver proper heating and cooling
airflows at normal external static pressures (except
for some 208-v applications).
CAUTION: For cooling, operation.» recotn-
mended atrfiow is 350to45^efm per each
Btuh. of rated cooling capacity. For beaisag
operatiooy atrßow naasi produce a teiuperatare
rise that ßdis within range stantped on unit
rating plate,
I able 4 shows heating airflow at various tempera­
ture rises. Table 6 shows both heating and cooling
airflows at various external static pressures. Refer
to these tables to determine airflow for system being
installed. See Tables 1 and 6 for cooling airflow.
NOTE: Be sure that all supply- and return-air
grilles are open, free from obstructions and
adjusted properly.
W.ARNTNG:- Disconnect 'electrical pow-er to
unit before changing any lead connections of
blower motor. stire to turn off gas supply
before disconnecting electrica! power.)
NOTE: When operating the 208/230-volt, 3-phase
versions of sizes 48GH048, 48GL060 and 48GEI060
at 208 volts; change lead connections of the blower
motor as indicated on unit wiring label to insure
proper airflow.
CAUTION: Do not chaitge blower-motor lead
connections on 460-v units from factory setting.
The heating and/ or cooling airflow of 208/ 230-v
motors can be changed by changing lead connec­
tions of blower motor. Motor leads are color-coded
as follows:
black - high speed
blue - medium speed
red - low speed
NOTE: Some blower motors do not have lead for
medium speed. Factory connections and available
optional connections are shown in Table 6.
For all units, motor lead connected to time delay
relay (heating) determines heating speed and
resulting airflow; and motor lead connected to
indoor fan relay (cooling) determines cooling speed
and resulting airflow. See unit wiring label.
To change heating and/or cooling speed, connect
appropriate color-coded lead to appropriate relay.
Be sure to properly insulate any unused motor lead.
See
Typical Wiring SPECIAL PROCEDURES
FOR 208-V OPERATION for proper procedures to
insulate an unused electrical lead.
When installing a 208- or 230-v unit that is
factory connected for heating and cooling speeds
that are not the same, and same speed for both
heating and cooling is required for a particular
appliction, connect appropriate color-coded lead
to terminal 2 of indoor fan relay (cooling) and
connect a field-supplied jumper between time delay
relay (heating) and terminal 2 of indoor fan
relay (cooling). Be sure to properly insulate unused
motor lead(s).
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