Carrier 50QQ - Manual (Page 10)

Table 6—Field Charging Table—Fixed Restrictor
HEATING OPERATING PRESSURES PSIG (Pressures at High and Low Side Service Ports)
MODEL INDOOR OUTDOOR TEMPERATURE (F) DRY BULB
50QQ DRY BULB (F) 60 50 40 30 20 10 0 -10
65 High 217 202 189 178 168 157 149 140
Low 77.2 65 53.8 43.7 34.7 26.8 19.7 12.6
018 70 High 232 217 203 192 181 169 158 147
Low 77.8 65.4 54.2 44 35 27 19.8 12.9
75 High 248 232 218 205 195 184 174 165
Low 78.4 65.9 54.9 44.4 35.2 27.3 21.1 13.2
65 High 219 204 191 179 171 161 150 139
Low 72.1 60.4 50.2 40.8 32.5 25.1 18.4 11.7
024 70 High 235 219 205 194 183 174 164 154
Low 72.6 60.9 50.5 41.2 32.9 25.4 18.7 12
75 High 251 235 221 209 196 185 176 165
Low 73.2 61.4 51 41.6 33.2 25.6 18.9 12.1
65 High 219 203 190 179 168 153 150 141
Low 70.5 58.9 48.7 39.8 31.9 24.7 18.1 11.6
030 70 High 235 219 205 195 184 170 158 145
Low 71.1 59.4 49.2 40.2 32.2 24.9 18.3 11.7
75 High 250 235 222 208 196 186 176 167
Low 71.5 59.9 49.7 40.6 32.5 25.2 18.6 11.9
65 High 218 202 190 180 172 161 152 142
Low 70.9 59.1 48.8 39.8 31.9 24.6 18.1 11.6
036 70 High 231 216 202 192 186 174 163 153
Low 71.4 59.6 49.3 40.1 32.2 24.9 18.3 11.7
75 High 246 230 216 205 198 187 178 169
Low 72 60.1 49.7 40.5 32.5 25.2 18.5 11.9
65 High 212 197 184 172 162 153 144 135
Low 69.6 58.1 48 39.2 31.5 24.4 18 11.6
042 70 High 226 211 197 185 174 164 155 145
Low 70.2 58.7 48.6 39.7 31.9 24.7 18.3 11.8
75 High 241 225 211 198 187 176 165 155
Low 70.7 59.2 49.1 40.2 32.3 25 18.5 12.1
65 High 315 200 186 174 163 154 145 136
Low 67.7 56.5 46.7 38.1 30.5 23.7 17.5 11.3
048 70 High 229 213 200 187 175 164 154 144
Low 68.3 57.1 47.2 38.6 31 24 17.8 11.5
75 High 243 227 213 200 189 177 167 156
Low 69 57.7 47.7 39 31.4 24.3 18.1 11.8
65 High 214 199 185 174 163 155 145 136
Low 65.2 54.2 44.7 36.4 29 22.5 16.6 10.8
060 70 High 228 213 199 187 175 164 155 146
Low 65.8 54.8 45.2 36.9 29.5 22.9 16.8 10.8
75 High 243 227 213 200 189 178 168 158
Low 66.4 55.4 45.7 37.3 29.9 23.2 17.1 11.0
NOTE: Add charge if pressures are low Bleed out charge if pressures are high. Allow ± 5 psig tolerance on high-side pressure.
B COOLING DESIRED SUPERHEAT TEMP (F)
(Measured at Low-Side Service Port)
OUTDOOR
DBT EVAPORATOR AIR INLET WBT (F)
DGT(F) 54 56 58 60 62 64 66 68 70 72 74 76
60 12 15 18 21 24 27 30 33 36 38 40 43
65 10 13 16 19 21 24 27 30 33 36 38 41
70 7 10 13 16 19 21 24 27 30 33 36 39
75 if 6 9 12 15 18 21 24 28 31 34 37
60
* *
5 8 12 15 18 21 25 28 31 35
85
■¥ * « * 8 11 15 19 22 26 30 33
90
* * * *
5 9 13 16 20 24 27 31
95 ♦ * * * *
6 10 14 18 22 25 29
100 ♦ * « * * * 8 12 15 20 23 27
105 ♦ * ♦ * * ♦
5 9 13 17 22 26
110 « * * « * * * 6 11 15 20 25
115
* ♦ * « * * * * 8 14 18 23
REQUIRED SUCTION TUBE (F) VS. DESIRED
SUPERHEAT (F)
(Measured at Low-Side Service Port)
DESIRED
SUPERHEAT
*Do not attempt to charge system under these conditions or refrigerant
slugging may occur
NOTE: Add charge if actual superheat temperature is higher than chart
value. Remove if lower Allow ± 3 F for tolerance.
Unit is factory charged with R-22 in accordance with amount shown
on rating plate. This chart is intended for usage when minor unit
charge adjustments are required. For large charge adjustments, evac­
uate unit and weigh in charge according to unit rating plate. Best per­
formance will be achieved when unit operates with a suction gas
superheat at compressor inlet of 5 F at normal rating conditions of
Air Conditioning and Refrigeration Institute (ARI). This chart may be
used to approximate the charge if ARI rating conditions cannot be
obtained. ARI rating conditions are 95 F db outdoor. 89 F and 67 F
wb indoor. See Table 4 for required indoor airflow rates. Charge unit
with outdoor fan operating only on high speed.
SUCTION OR LOW-SIDE PRESSURE (psig)
AT SERVICE PORT
TEMP (F) 61.5 64.2 67.1 70 73 76 79.2 82.4 85.7
0 35 37 39 41 43 45 47 49 51
2 37 39 43 43 45 47 49 51 53
4 39 41 43 45 47 49 51 53 55
6 41 43 45 47 49 51 53 55 57
8 43 45 47 49 51 53 55 57 59
10 45 47 49 51 53 55 57 59 61
12 47 49 51 53 55 57 59 61 63
14 49 51 53 55 57 59 61 63 65
16 51 53 55 57 59 61 63 65 67
18 53 55 57 59 61 63 65 67 69
20 55 57 59 61 63 65 67 69 71
22 57 59 61 63 65 67 69 71 73
24 59 61 63 65 67 69 71 73 75
26 61 63 65 67 69 71 73 75 77
28 63 65 67 69 71 73 75 77 79
30 65 67 69 71 73 75 77 79 81
32 67 69 71 73 75 77 79 81 83
34 69 71 73 75 77 79 81 83 85
36 71 73 75 77 79 81 83 85 87
38 73 75 77 79 81 83 85 87 89
40 75 77 79 81 83 85 87 89 91
NOTE: Measure suction tube (F) with accurate superheat thermocouple
or thermistor-type thermometer.
FINAL DISPOSAL: CAUTION—CAREFULLY RELIEVE REFRIGERANT
PRESSURE WITHIN UNIT BEFORE FINAL DISPOSAL
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