Lennox 14HPX-036-230-18 - Page 45

HFC-410A CHARGING INFORMATION
Maintenance checks using the Normal Operating Pressures table
Table 1 may be used to help perform maintenance checks. This table is not a procedure for
charging the system and any minor variations in the pressures may be expected due to differ
ences in installations. However, significant deviations could mean that the system is not prop
erly charged or that a problem exists with some component in the system.
Matchups/Charge Levels and Line Set Lengths
Table 2 lists all the Lennox recommended indoor unit matchups along with the charge levels
for the various sizes of outdoor units. Charge levels on the unit nameplate are based on
installations with 15' (4.6m) line sets; be sure to consider any difference in line set
length (see Installation Instructions for more details).
Charge Using the Weigh‐in Method
If the system is void of refrigerant, locate and repair any leaks and then weigh in the refriger
ant charge into the unit. For charge adjustments, be sure to consider line set length differ
ences and, referring to table 2, adjust for the matchup difference.
1 - Recover the refrigerant from the unit.
2 - Conduct leak check; evacuate as previously outlined.
3 - Weigh in the unit nameplate charge, adjusting for matchup and line set length differ
ences. If weighing facilities are not available use the Subcooling method.
Charge Using the Subcooling Method
Cooling Mode—When the outdoor ambient temperature is 60°F (15°C) and above, use the
cooling mode to adjust the charge using the subcooling method. Target subcooling values
in table 2 are based on 70 to 80°F (21-27°C) indoor return air temperature.
Heating Mode—When the outdoor ambient temperature is below 60°F (15°C), use the hea
ting mode to adjust the charge using the subcooling charge levels (table ). Target subcooling
values in table 2 are based on 65-75°F (18-24°C) indoor return air temperature.
Table 1 - Normal Operating Pressures (Liquid +10 and Suction +5 psig)
The values in this table are “most-popular-match-up” pressures; indoor match up, indoor
air quantity, and indoor load will cause the pressures to vary.
Model -018 -024 -030 -036 -042 -048 -060
°F (°C)*
Liquid Line Pressure / Vapor Line Pressure
COOLING
65 (18) 226 / 140 233 / 137 238 / 138 220 / 138 223 / 125 231 / 136 243 / 136
70 (21) 244 / 141 252 / 138 263 / 139 236 / 140 241 / 130 248 / 139 263 / 137
75 (24) 263 / 142 271 / 140 279 / 139 256 / 141 261 / 134 271 / 140 282 / 138
80 (27) 283 / 143 292 / 141 299 / 140 276 / 142 282 / 138 291 / 142 306 / 139
85 (29) 302 / 144 314 / 142 324 / 141 298 / 143 302 / 139 312 / 143 327 / 140
90 (32) 328 / 145 338 / 143 340 / 142 321 / 144 326 / 140 335 / 144 351 / 141
95 (35) 351 / 146 361 / 145 375 / 145 344 / 144 349 / 141 359 / 145 376 / 142
100 (38) 376 / 147 387 / 146 397 / 145 369 / 146 374 / 142 384 / 146 401 / 143
105 (41) 402 / 148 412 / 147 424 / 147 394 / 147 399 / 143 411 / 148 426 / 145
110 (38) 430 / 149 441 / 148 454 / 150 421 / 148 428 / 145 439 / 149 452 / 146
115 (45) 465 / 150 471 / 151 485 / 150 449 / 149 455 / 146 468 / 150 484 / 148
HEATING
60 (15) 346 / 139 352 / 138 338 / 137 350 / 134 373 / 139 355 / 130 351 / 117
50 (10) 323 / 117 331 / 114 334 / 112 331 / 117 363 / 117 336 / 113 333 / 105
40 (4) 306 / 98 304 / 99 312 / 93 313 / 97 348 / 97 315 / 88 316 / 88
30 (-1) 278 / 84 299 / 80 302 / 74 298 / 83 336 / 74 296 / 72 308 / 70
20 (-7) 273 / 66 283 / 66 280 / 53 284 / 66 322 / 64 286 / 64 300 / 61
*Temperature of the air entering the outdoor coil.
Table 2 - Indoor Units Matchups and Subcooling Charge Levels
INDOOR MATCHUPS
Target
Subcooling
HeatingCooling
(+5ºF) (+1ºF)
*Add
charge
INDOOR MATCHUPS
Target
Subcooling
HeatingCoolin
g
(+5ºF) (+1ºF)
*Add
charge
INDOOR MATCHUPS
Target
Subcooling
HeatingCooling
(+5ºF) (+1ºF)
*Add
charge
14HPX/XP14−018 lb oz 14HPX/XP14−030 (Continued) lb oz 14HPX/XP14/TPA*H4−042 (Continued) lb oz
CBX27UH-018/024 13 7 0 8 CH33-42B 6 6 1 12 CR33-50/60C and -60D 26 6 0 4
CBX32MV-018/024 15 7 0 0 CR33-30/36A/B/C 30 8 0 8 CX34-62C and -62D 12 6 0 9
CBX40UHV-024 15 7 0 0 CX34-31A/B 11 6 1 6 CX34-49C 12 6 0 7
14HPX/XP14−024 lb oz CX34-38A/B S/N# 6007 and after 6 6 2 3 CX34-60D 12 6 0 4
CBX26UH-024 25 7 0 0 CX34-38A/B Before S/N# 6007 11 6 2 3 14HPX/XP14/TPA*H4−048 lb oz
CBX27UH-018/024 15 8 1 2 CX34-43B/C 15 11 2 14 CBX26UH-048 8 7 1 9
CBX32M-018/024 16 8 0 14 14HPX/XP14/TPA*H4−036 lb oz CBX27UH-048 11 8 1 2
CBX32M-030 15 8 1 3 C33-44C 13 6 0 0 CBX32M-048 and -060 11 8 1 2
CBX32MV-018/024 16 8 0 14 CBX26UH-036 26 5 0 0 CBX32MV-048 25 8 0 0
CBX32MV-024/030 15 8 1 2 CBX26UH-037 25 4 1 9 CBX32MV-060 11 8 1 2
CBX40UHV-024 16 8 0 14 CBX27UH-036 13 6 0 3 CBX40UHV-048 25 8 0 0
CBX40UHV-030 15 8 1 2 CBX32M-036 13 6 0 2 CBX40UHV-060 11 8 1 2
CH23-41 16 8 0 2 CBX32M-042 13 6 0 3 CBX32MV-068 10 7 1 12
CH33-25A 16 6 0 7 CBX32MV-036 13 6 0 3 CH23-68 20 9 2 9
CH33-42B 14 11 1 10 CBX32MV-048 11 8 2 5 CH33-50/60C 11 8 1 1
CH33-36A 16 8 1 0 CBX40UHV-036 13 6 0 3 CH33-62D 10 7 1 14
CH33-36C 16 8 0 4 CBX40UHV-042 and -048 11 8 2 5 CH33-60D 11 8 0 0
CR33-30/36A/B/C 25 7 0 2 CH33-50/60C 11 8 2 5 CR33-50/60C 35 5 0 0
CX34-25A/B 16 8 0 14 CH33-44B 13 6 1 7 CR33-60D 37 6 0 0
CX34-31A/B 15 8 1 3 CH33-48B 13 6 1 8 CX34-62C and -62D 10 7 1 7
CX34-36A/B/C 16 8 1 8 CR33-50/60C 25 4 1 15 CX34-49C 11 8 0 14
CX34-38A/B S/N# 6007 and after 11 11 2 2 CR33-48B/C 25 5 0 9 CX34-60D 11 8 0 0
CX34-38A/B before S/N# 6007 14 11 2 2 CX34-49C 13 6 2 4 14HPX/XP14/TPA*H4−060 lb oz
14HPX/XP14−030 lb oz CX34-43B/C and -50/60C 13 6 1 8 CBX26UH-048 12 7 1 0
CH23-41 11 6 0 8 CX34-38A/B S/N# 6007 and after and -44/48 6 6 0 0 CBX26UH-060 13 7 0 0
CH23-51 6 6 1 12 CX34-38A/B before S/N# 6007 13 6 0 0 CBX27UH-060 12 5 0 0
CBX26UH-024 30 8 0 6 14HPX/XP14/TPA*H4−042 lb oz CBX32M-048 and -060 12 5 0 0
CBX26UH-030 29 8 2 3 CH23-68 20 9 0 13 CBX32MV-048 and -060 12 5 0 0
CBX27UH-030 11 6 2 4 CBX26UH-042 27 6 0 0 CBX40UHV-048 and -060 12 5 0 0
CBX32M-030 11 6 1 6 CBX27UH-042 12 6 0 8 CBX32MV-068 12 7 1 0
CBX32M-036, CBX27UH-036 11 6 2 4 CBX32M-048 12 6 0 7 CH23-68 12 5 0 0
CBX32MV-024/030 11 6 1 6 CBX32MV-048 12 6 0 8 CH33-50/60C 12 5 0 0
CBX32MV-036 15 7 3 0 CBX40UHV-042 and -048 12 6 0 8 CH33-62D 12 5 0 0
CBX40UHV-024 and -030 11 6 1 6 CH33-43 12 6 0 7 CX34-62C and -62D 12 7 1 0
CBX40UHV-036 15 7 3 0 CH33-62D 12 6 0 10 *Add charge = Extra matchup amount required in addition to
charge indicated on Heat Pump nameplate (remember to also add
any charge required for line set differences from 15 feet). SN indi
cates serial number.
C33-44C 11 6 2 3 CH33-50/60C 12 6 0 7
CH33-36C 11 3 0 0 CH33-60D 12 6 0 4
*2P0611* *P401241S*
06/11 401241S