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505366M 01/08
Table 6. HCFC−22 Normal Operating Pressures (Liquid +10 and Suction +5 psig)
IMPORTANT
Use this table to perform maintenance checks; it is not a procedure for
charging the system. Minor variations in these pressures may be due to
differences in installations. Significant deviations could mean that the system
is not properly charged or that a problem exists with some component in the
system.
13ACD
−018 −024 −030 −036 −042 −048 −060
5F (5C)*
Liquid / Suction Liquid / Suction Liquid / Suction Liquid / Suction Liquid / Suction Liquid / Suction Liquid / Suction
Expansion Valve (TXV)
65 (18) 138 / 79 148 / 79 147 / 75 155 / 79 147 / 78 144 / 77 152 / 73
70 (21) 148 / 80 160 / 79 159 / 75 169 / 80 158 / 78 152 / 77 164 / 75
75 (24) 160 / 80 174 / 80 172 / 76 183 / 81 172 / 79 163 / 78 177 / 77
80 (27) 174 / 81 188 / 81 186 / 77 199 / 81 189 / 79 179 / 78 192 / 78
85 (29) 188 / 81 203 / 81 201 / 77 215 / 82 205 / 80 195 / 79 208 / 79
90 (32) 204 / 81 220 / 82 216 / 78 233 / 82 222 / 81 212 / 80 225 / 80
95 (35) 219 / 82 236 / 83 233 / 79 252 / 83 241 / 81 229 / 80 243 / 80
100 (38) 236 / 82 253 / 83 250 / 80 271 / 83 259 / 82 245 / 81 261 / 81
105 (41) 253 / 83 272 / 84 268 / 80 291 / 84 279 / 82 265 / 81 280 / 82
110 (43) 272 / 84 291 / 85 287 / 81 311 / 85 299 / 83 287 / 82 299 / 83
115 (45) 291 / 84 311 / 85 306 / 82 331 / 86 320 / 84 309 / 83 320 / 83
Fixed Orifice (RFC)
65 (18) 139 / 67 147 / 71 148 / 65 162 / 75 158 / 72 151 / 71 152 / 68
70 (21) 149 / 70 159 / 73 161 / 67 174 / 76 170 / 75 161 / 73 165 / 71
75 (24) 161 /74 172 / 75 175 / 70 187 / 78 182 / 76 172 / 75 178 / 73
80 (27) 175 / 77 186 / 77 190 / 73 201 / 79 195 / 78 185 / 76 193 / 76
85 (29) 189 / 79 200 / 79 205 / 75 215 / 81 209 / 80 198 / 77 208 / 78
90 (32) 203 / 81 216 / 81 221 / 77 231 / 82 224 / 81 213 / 79 224 / 80
95 (35) 218 / 82 232 / 82 237 / 79 247 / 83 240 / 82 227 / 80 239 / 81
100 (38) 234 / 83 247 / 83 254 / 80 265 / 84 256 / 84 243 / 81 258 / 82
105 (41) 251 / 85 264 / 85 271 / 81 283 / 85 273 / 85 259 / 82 276 / 83
110 (43) 269 / 86 285 / 86 289 / 82 302 / 86 290 / 86 276 / 84 294 / 85
115 (45) 287 / 87 302 / 87 308 / 83 321 / 87 310 / 87 293 / 85 313 / 86
INSTALLING SERVICE VALVE CAPS
Disconnect gauge set and re−install both the liquid and
suction service valve caps.
INSTALL CAPS
OUTDOOR UNIT
SERVICE VALVES
Figure 33. Installing Service Valve Caps
System Operation
The outdoor unit and indoor blower cycle on demand from
the room thermostat. When the thermostat blower switch
is in the ON position, the indoor blower operates
continuously.
Maintenance
WARNING
Electric shock hazard. Can cause
injury or death. Before attempting to
perform any service or maintenance,
turn the electrical power to unit OFF at
disconnect switch(es). Unit may have
multiple power supplies.
WARNING
Improper installation, adjustment, alteration,
service or maintenance can cause personal injury,
loss of life, or damage to property.
Installation and service must be performed by a
licensed professional installer (or equivalent) or a
service agency.
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