International Comfort Products R4A318A*KA100, WCA3184GKA1, R4A324A*KA100, WCA3244GKA1, R4A330A*KA100 TECHNICAL MANUAL

TECHNICAL SUPPORT MANUAL

Split System Air Conditioner

R4A3, WCA3**4

Safety Labeling and Signal Words

DANGER, WARNING, CAUTION, and
NOTE

The signal words DANGER, WARNING, CAU­TION, and NOTE are used to identify levels of haz-

ard seriousness. The signal word DANGER is only
used on product labels to signify an immediate haz­ard. The signal words WARNING, CAUTION, and
NOTE will be used on product labels and through­out this manual and other manuals that may apply
to the product.

DANGER − Immediate hazards which will result in
severe personal injury or death.

WARNING − Hazards or unsafe practices which
could result in severe personal injury or death.

CAUTION − Hazards or unsafe practices which
may result in minor personal injury or product or

property damage.

NOTE − Used to highlight suggestions which will
result in enhanced installation, reliability, or opera­tion.

Signal Words in Manuals

The signal word WARNING is used throughout this
manual in the following manner:

!

The signal word CAUTION is used throughout this
manual in the following manner:

!

Signal Words on Product Labeling

Signal words are used in combination with colors
and/or pictures on product labels.

WARNING

WARNING

CAUTION

TABLE OF CONTENTS

Wiring Diagram 2................................

Charging Chart 3.................................

Tech Labels (Expanded Data) 4 − 10................

R4A3 Cooling Multipying Factors 11 − 14............

WCA3**4 Cooling Multipying Factors 15 − 16.........

Model Number Identification 17 − 18................

R4A318A*KA100 WCA3184GKA1
R4A324A*KA100 WCA3244GKA1
R4A330A*KA100 WCA3304GKA1
R4A336A*KB100 WCA3364GKA1
R4A342A*KB100 WCA3424GKA1
R4A348A*KB100 WCA3484GKA1
R4A360A*KB100 WCA3604GKA1
* = A for standard inlet grille,
G for inlet grille with 3/8” (10mm) tight−wire spacing

!

DEATH, PERSONAL INJURY, AND/OR PROPERTY
DAMAGE HAZARD

Failure to carefully read and follow this warning
could result in equipment malfunction, property
damage, personal injury and/or death.

Installation or repairs made by unqualified per­sons could result in equipment malfunction, prop­erty damage, personal injury and/or death.

The information contained in this manual is in­tended for use by a qualified service technician fa­miliar with safety procedures and equipped with
the proper tools and test instruments.

Installation must conform with local building
codes and with the National Electrical Code
NFPA70 current edition or Canadian Electrical
Code Part 1 CSA C.22.1.

WARNING

421 04 6001 00 April 2010

2 421 04 6001 00

TECHNICAL SUPPORT MANUAL Split System Air Conditioner: R4A3, WCA3**4

Model Sizes: 18, 24, 30, 36, 42, 48, 60

1. Symbols are electrical representation only.

2. Compressor and fan motor furnished with inherent thermal protection.

3. To be wired in accordance with National Electric N.E.C. and local codes.

4. N.E.C. class 2, 24 V circuit, min. 40 VA required, 60 VA on units installed with LLS.

5. Use copper conductors only. Use conductors suitable for at least 75°C (167°F).

6. Connection for typical cooling only thermostat. For other arrangements see installation instructions.

7. If indoor section has a transformer with a grounded secondary, connect the grounded side to the BRN/YEL lead.

8. When start capacitor and relay are installed, start thermistor (PTC) is not used.

9. CH not used on all units.

10. If any of the original wire, as supplied, must be replaced, use the same or equivalent wire.

11. Check all electrical connections inside control box for tightness.

12. Do not attempt to operate unit until service valves have been opened.

13. Do not rapid cycle compressor. Compressor must be off 3 minutes to allow pressures to equalize between high and low side before starting.

14. Wire not present if HPS, LPS or CTD are used.

335620−101 REV. B

TECHNICAL SUPPORT MANUAL Split System Air Conditioner: R4A3, WCA3**4

R−410A CHARGING CHART

Rating Plate (required) Subcooling Temperature ° F (° C)

Measured Liquid

Pressure (psig)

251 78 26 76 24 74 23 72 22 70 21 68 20
259 80 27 78 26 76 24 74 23 72 22 70 21
266 82 28 80 27 78 26 76 24 74 23 72 22
274 84 29 82 28 80 27 78 26 76 24 74 23
283 86 30 84 29 82 28 80 27 78 26 76 24
291 88 31 86 30 84 29 82 28 80 27 78 26
299 90 32 88 31 86 30 84 29 82 28 80 27
308 92 33 90 32 88 31 86 30 84 29 82 28
317 94 34 92 33 90 32 88 31 86 30 84 29
326 96 36 94 34 92 33 90 32 88 31 86 30
335 98 37 96 36 94 34 92 33 90 32 88 31
345 100 38 98 37 96 36 94 34 92 33 90 32
364 104 40 102 39 100 38 98 37 96 36 94 34
374 106 41 104 40 102 39 100 38 98 37 96 36
384 108 42 106 41 104 40 102 39 100 38 98 37
395 110 43 108 42 106 41 104 40 102 39 100 38
406 112 44 11 0 43 108 42 106 41 104 40 102 39
416 114 46 11 2 44 110 43 108 42 106 41 104 40
427 116 47 11 4 46 112 44 11 0 43 108 42 106 41
439 118 48 11 6 47 114 46 11 2 44 110 43 108 42
450 120 49 118 48 116 47 114 46 112 44 11 0 43
462 122 50 120 49 11 8 48 116 47 11 4 46 112 44
474 124 51 122 50 120 49 118 48 11 6 47 114 46

° F (° C) ° F (° C) ° F (° C) ° F (° C) F (° C) F (° C)

6 3 8 4 10 6 12 7 14 8 16 9

R−410A Required Liquid Line Temperature ° F (° C)

421 04 6001 00 3

4 421 04 6001 00

† Total capacities are net (I.D. blower heat subtracted) system capacities based on 25’ line set.

†† At TVA rating indoor condition (75 °F db, 63 °F wb), all other indoor air temperatures are at 80 ° F db

^ System amps are total of indoor and outdoor amps.

‡ Chart data is for 80° F indoor dry bulb. For indoor db temperatures other than 80° F, measure Indoor db and Indoor CFM, and plug these into the
formula below. Measure outdoor db and indoor wet bulb, apply these to the chart above, find MBh and S/T, and plug these into the formula below.
(Note: if indoor db is the only thing changing, total capacity, MBh, stays the same.)

18 Size Outdoor With ED*4X18B** Indoor Cooling

Outdoor Ambient Temperature − Degrees F, Dry Bulb

511501595857

Entering Indoor Temperature − Degrees F, Wet Bulb

CFM 7267625772676257726762577267625772676257

MBh†

525

AMPS*

HI PR

LO PR

MBh†

600

AMPS* 5.22 5.29 5.36 5.37 5.96 6.04 6.10 6.11 6.78 6.86 6.92 6.92 7.70 7.78 7.84 7.84 8.72 8.80 8.85 8.85

HI PR

LO PR

MBh†

675

AMPS*

HI PR

LO PR

If additional tubing length and/or indoor unit is located above outdoor unit, a slight variation in capacity may occur.

If additional tubing length and/or indoor unit is located above outdoor unit, a slight variation in capacity may occur.

20.35 18.72 17.21 16.70 19.43 17.86 16.41 16.05 18.46 16.95 15.59 15.37 17.51 16.04 14.75 14.67 16.49 15.07 13.92 13.92

S/T‡

S/T‡

S/T‡

0.50 0.66 0.86 1.00 0.50 0.68 0.88 1.00 0.51 0.69 0.90 1.00 0.52 0.71 0.92 1.00 0.53 0.73 1.00 1.00

5.11 5.19 5.26 5.28 5.86 5.94 6.00 6.02 6.68 6.76 6.82 6.84 7.60 7.68 7.75 7.75 8.61 8.70 8.77 8.77
286 282 279 277 329 325 321 320 376 372 368 368 428 424 421 421 485 482 479 479
155 142 130 126 158 144 132 130 160 146 135 133 162 149 138 137 165 151 141 141

20.73 19.03 17.59 17.38 19.69 18.14 16.78 16.69 18.69 17.20 15.95 15.97 17.72 16.27 15.23 15.23 16.67 15.27 14.44 14.44

0.51 0.69 0.90 1.00 0.52 0.71 0.92 1.00 0.53 0.73 1.00 1.00 0.54 0.75 1.00 1.00 0.55 0.77 1.00 1.00

287 283 280 279 330 326 323 322 377 373 370 370 429 425 422 422 486 482 480 480
159 145 134 132 161 147 136 136 163 150 139 139 165 152 143 143 168 154 147 147

21.01 19.25 17.94 17.92 19.88 18.34 17.20 17.20 18.85 17.38 16.44 16.44 17.86 16.43 15.67 15.67 16.79 15.41 14.84 14.84

0.53 0.72 0.99 1.00 0.54 0.74 1.00 1.00 0.55 0.76 1.00 1.00 0.56 0.78 1.00 1.00 0.57 0.81 1.00 1.00

5.33 5.40 5.46 5.46 6.06 6.14 6.20 6.20 6.89 6.97 7.02 7.02 7.81 7.89 7.93 7.93 8.82 8.91 8.94 8.94
288 284 281 281 331 327 324 324 378 374 371 371 430 426 424 424 487 483 482 482
162 148 138 137 164 150 141 141 166 152 144 144 168 154 148 148 170 157 151 151

TECHNICAL SUPPORT MANUAL Split System Air Conditioner: R4A3, WCA3**4

Sensible Capacity at Indoor db LOWER than 80 ° F = ( MBh x S/T ) −

Sensible Capacity at Indoor db HIGHER than 80 ° F = ( MBh x S/T ) +

( 80 − Indoor db ) x 835 x Indoor CFM

(

( Indoor db − 80 ) x 835 x Indoor CFM

(

1000

1000

)
)

421 04 6001 00 5

24 Size Outdoor With ED*4X24B** Indoor Cooling

Outdoor Ambient Temperature − Degrees F, Dry Bulb

511501595857

Entering Indoor Temperature − Degrees F, Wet Bulb

CFM 7267625772676257726762577267625772676257

MBh† 27.06 24.87 22.98 22.41 25.82 23.82 22.00 21.61 24.64 22.70 20.97 20.75 23.44 21.55 19.91 19.85 22.11 20.29 18.87 18.87

S/T‡

700

AMPS*

HI PR

LO PR

MBh†

S/T‡

800

AMPS*

HI PR

LO PR

MBh†

S/T‡

900

AMPS*

HI PR

LO PR

† Total capacities are net (I.D. blower heat subtracted) system capacities based on 25’ line set.

If additional tubing length and/or indoor unit is located above outdoor unit, a slight variation in capacity may occur.

†† At TVA rating indoor condition (75 °F db, 63 °F wb), all other indoor air temperatures are at 80 ° F db

If additional tubing length and/or indoor unit is located above outdoor unit, a slight variation in capacity may occur.

^ System amps are total of indoor and outdoor amps.

‡ Chart data is for 80° F indoor dry bulb. For indoor db temperatures other than 80° F, measure Indoor db and Indoor CFM, and plug these into the
formula below. Measure outdoor db and indoor wet bulb, apply these to the chart above, find MBh and S/T, and plug these into the formula below.
(Note: if indoor db is the only thing changing, total capacity, MBh, stays the same.)

0.49 0.66 0.85 1.00 0.50 0.67 0.87 1.00 0.50 0.69 0.89 1.00 0.51 0.70 0.91 1.00 0.52 0.72 1.00 1.00

7.15 7.12 7.10 7.10 8.00 7.98 7.96 7.96 8.95 8.93 8.92 8.92 10.01 9.99 9.98 9.98 11.17 11.16 11.16 11.16
291 286 283 281 335 330 326 325 383 378 374 374 436 431 427 427 493 489 486 486
156 142 130 127 158 144 132 130 160 146 135 133 162 148 137 137 164 151 140 140

27.49 25.24 23.44 23.25 26.14 24.15 22.46 22.40 24.93 23.00 21.49 21.49 23.69 21.83 20.55 20.55 22.33 20.54 19.52 19.52

0.51 0.69 0.89 1.00 0.52 0.71 0.91 1.00 0.52 0.72 1.00 1.00 0.53 0.74 1.00 1.00 0.55 0.76 1.00 1.00

7.31 7.28 7.27 7.26 8.16 8.14 8.13 8.12 9.11 9.09 9.08 9.08 10.17 10.15 10.14 10.14 11.32 11.32 11.32 11.32
292 287 284 283 336 331 328 327 384 379 376 376 437 432 429 429 494 490 487 487
159 146 134 133 161 147 136 136 163 149 139 139 165 151 143 143 167 154 146 146

27.76 25.50 23.92 23.92 26.38 24.39 23.03 23.04 25.12 23.21 22.08 22.08 23.86 22.02 21.10 21.10 22.46 20.70 20.02 20.02

0.52 0.72 1.00 1.00 0.53 0.74 1.00 1.00 0.54 0.76 1.00 1.00 0.55 0.78 1.00 1.00 0.57 0.80 1.00 1.00

7.48 7.44 7.43 7.43 8.32 8.30 8.29 8.29 9.27 9.25 9.24 9.24 10.33 10.31 10.30 10.30 11.48 11.47 11.47 11.47
293 288 285 285 337 332 329 329 385 380 377 377 438 433 431 431 495 490 489 489
162 148 138 138 164 150 141 141 166 152 144 144 168 154 148 148 170 156 151 151

TECHNICAL SUPPORT MANUAL Split System Air Conditioner: R4A3, WCA3**4

Sensible Capacity at Indoor db LOWER than 80 ° F = ( MBh x S/T ) −

Sensible Capacity at Indoor db HIGHER than 80 ° F = ( MBh x S/T ) +

( 80 − Indoor db ) x 835 x Indoor CFM

(

( Indoor db − 80 ) x 835 x Indoor CFM

(

1000

1000

)
)

6 421 04 6001 00

† Total capacities are net (I.D. blower heat subtracted) system capacities based on 25’ line set.

†† At TVA rating indoor condition (75 °F db, 63 °F wb), all other indoor air temperatures are at 80 ° F db

^ System amps are total of indoor and outdoor amps.

‡ Chart data is for 80° F indoor dry bulb. For indoor db temperatures other than 80° F, measure Indoor db and Indoor CFM, and plug these into the
formula below. Measure outdoor db and indoor wet bulb, apply these to the chart above, find MBh and S/T, and plug these into the formula below.
(Note: if indoor db is the only thing changing, total capacity, MBh, stays the same.)

30 Size Outdoor With ED*4X30B** Indoor Cooling

Outdoor Ambient Temperature − Degrees F, Dry Bulb

511501595857

Entering Indoor Temperature − Degrees F, Wet Bulb

CFM 7267625772676257726762577267625772676257

MBh†

875

AMPS*

HI PR

LO PR

MBh†

1000

AMPS* 8.79 8.75 8.73 8.73 9.83 9.79 9.78 9.78 10.98 10.95 10.93 10.93 12.26 12.24 12.23 12.23 13.66 13.65 13.65 13.65

HI PR

LO PR

MBh†

1125

AMPS*

HI PR

LO PR

If additional tubing length and/or indoor unit is located above outdoor unit, a slight variation in capacity may occur.

If additional tubing length and/or indoor unit is located above outdoor unit, a slight variation in capacity may occur.

31.88 29.45 27.29 26.90 30.55 28.21 26.15 25.94 29.17 26.90 24.96 24.91 27.73 25.54 23.83 23.83 26.14 24.04 22.65 22.65

S/T‡

S/T‡

S/T‡

0.52 0.70 0.91 1.00 0.53 0.72 0.93 1.00 0.53 0.73 0.95 1.00 0.54 0.75 1.00 1.00 0.56 0.77 1.00 1.00

8.58 8.55 8.52 8.52 9.62 9.59 9.57 9.57 10.77 10.75 10.73 10.73 12.06 12.03 12.02 12.02 13.46 13.45 13.45 13.45
297 292 288 287 342 337 332 332 391 385 381 381 444 439 435 435 502 497 494 494
158 144 132 130 159 146 134 133 161 148 137 136 163 150 140 140 166 152 143 143

32.25 29.82 27.85 27.82 30.87 28.55 26.81 26.81 29.45 27.20 25.72 25.73 27.98 25.81 24.59 24.60 26.34 24.28 23.35 23.35

0.54 0.74 0.99 1.00 0.55 0.75 1.00 1.00 0.56 0.77 1.00 1.00 0.57 0.79 1.00 1.00 0.58 0.82 1.00 1.00

298 293 289 289 343 338 334 334 392 386 383 383 445 440 437 437 502 498 496 496
161 147 136 136 163 149 139 139 164 151 142 142 166 153 145 145 168 155 149 149

32.50 30.08 28.55 28.55 31.08 28.78 27.50 27.50 29.63 27.41 26.36 26.37 28.13 26.00 25.19 25.19 26.46 24.45 23.89 23.89

0.56 0.77 1.00 1.00 0.57 0.79 1.00 1.00 0.58 0.81 1.00 1.00 0.59 0.84 1.00 1.00 0.61 0.86 1.00 1.00

8.99 8.96 8.94 8.94 10.03 10.00 9.98 9.98 11.18 11.15 11.14 11.14 12.46 12.44 12.43 12.43 13.86 13.85 13.85 13.85
299 294 291 291 344 339 336 336 393 387 385 385 446 441 439 439 503 498 497 497
163 150 141 141 165 151 144 144 167 153 147 147 169 155 150 150 171 157 154 154

TECHNICAL SUPPORT MANUAL Split System Air Conditioner: R4A3, WCA3**4

Sensible Capacity at Indoor db LOWER than 80 ° F = ( MBh x S/T ) −

Sensible Capacity at Indoor db HIGHER than 80 ° F = ( MBh x S/T ) +

( 80 − Indoor db ) x 835 x Indoor CFM

(

( Indoor db − 80 ) x 835 x Indoor CFM

(

1000

1000

)
)

421 04 6001 00 7

36 Size Outdoor With ED*4X48J** Indoor Cooling

Outdoor Ambient Temperature − Degrees F, Dry Bulb

511501595857

Entering Indoor Temperature − Degrees F, Wet Bulb

CFM 7267625772676257726762577267625772676257

MBh† 29.86 36.66 33.97 33.42 38.13 35.22 32.65 32.30 36.46 33.64 31.21 31.07 34.71 31.99 29.76 29.78 32.77 30.17 28.35 28.35

S/T‡

1050

AMPS*

HI PR

LO PR

MBh†

S/T‡

1200

AMPS*

HI PR

LO PR

MBh†

S/T‡

1350

AMPS*

HI PR

LO PR

† Total capacities are net (I.D. blower heat subtracted) system capacities based on 25’ line set.

If additional tubing length and/or indoor unit is located above outdoor unit, a slight variation in capacity may occur.

†† At TVA rating indoor condition (75 °F db, 63 °F wb), all other indoor air temperatures are at 80 ° F db

If additional tubing length and/or indoor unit is located above outdoor unit, a slight variation in capacity may occur.

^ System amps are total of indoor and outdoor amps.

‡ Chart data is for 80° F indoor dry bulb. For indoor db temperatures other than 80° F, measure Indoor db and Indoor CFM, and plug these into the
formula below. Measure outdoor db and indoor wet bulb, apply these to the chart above, find MBh and S/T, and plug these into the formula below.
(Note: if indoor db is the only thing changing, total capacity, MBh, stays the same.)

1.00 0.69 0.89 1.00 0.52 0.70 0.91 1.00 0.52 0.71 0.93 1.00 0.53 0.73 1.00 1.00 0.54 0.75 1.00 1.00

16.97 10.48 10.46 10.45 11.80 11.77 11.75 11.74 13.22 13.19 13.17 13.17 14.79 14.77 14.75 14.75 16.51 16.49 16.48 16.48
494 294 289 288 344 338 333 332 392 386 380 380 444 438 433 433 500 494 490 490
155 146 134 131 161 147 135 134 163 149 138 137 165 151 140 140 167 153 144 144

40.35 37.10 34.75 34.54 38.49 35.62 33.33 33.37 36.81 34.00 32.07 32.07 35.01 32.31 30.71 30.71 33.02 30.45 29.20 29.20

0.53 0.72 0.92 1.00 0.53 0.74 1.00 1.00 0.54 0.75 1.00 1.00 0.55 0.77 1.00 1.00 0.57 0.80 1.00 1.00

10.76 10.72 10.71 10.70 12.05 12.02 11.99 12.00 13.47 13.44 13.42 13.42 15.04 15.01 15.00 15.00 16.75 16.73 16.73 16.73
301 295 291 291 346 339 335 335 393 387 383 383 445 439 435 435 501 495 492 492
163 149 138 137 164 150 140 140 166 152 143 143 168 154 146 146 170 156 150 150

40.70 37.49 35.43 35.43 38.75 35.90 34.21 34.21 37.03 34.25 32.85 32.85 35.19 32.53 31.43 31.43 33.17 30.65 29.86 29.86

0.54 0.75 1.00 1.00 0.55 0.77 1.00 1.00 0.56 0.79 1.00 1.00 0.58 0.81 1.00 1.00 0.59 0.84 1.00 1.00

11.00 10.97 10.96 10.96 12.29 12.26 12.25 12.25 13.72 13.69 13.67 13.67 15.29 15.26 15.25 15.25 17.00 16.98 16.97 16.97
301 296 293 293 347 340 337 337 395 388 385 385 446 440 438 438 502 496 494 494
165 151 143 143 167 153 145 145 169 155 148 148 170 157 151 151 172 159 155 155

TECHNICAL SUPPORT MANUAL Split System Air Conditioner: R4A3, WCA3**4

Sensible Capacity at Indoor db LOWER than 80 ° F = ( MBh x S/T ) −

Sensible Capacity at Indoor db HIGHER than 80 ° F = ( MBh x S/T ) +

( 80 − Indoor db ) x 835 x Indoor CFM

(

( Indoor db − 80 ) x 835 x Indoor CFM

(

1000

1000

)
)

8 421 04 6001 00

† Total capacities are net (I.D. blower heat subtracted) system capacities based on 25’ line set.

†† At TVA rating indoor condition (75 °F db, 63 °F wb), all other indoor air temperatures are at 80 ° F db

^ System amps are total of indoor and outdoor amps.

‡ Chart data is for 80° F indoor dry bulb. For indoor db temperatures other than 80° F, measure Indoor db and Indoor CFM, and plug these into the
formula below. Measure outdoor db and indoor wet bulb, apply these to the chart above, find MBh and S/T, and plug these into the formula below.
(Note: if indoor db is the only thing changing, total capacity, MBh, stays the same.)

42 Size Outdoor With ED*4X42J** Indoor Cooling

Outdoor Ambient Temperature − Degrees F, Dry Bulb

511501595857

Entering Indoor Temperature − Degrees F, Wet Bulb

CFM 7267625772676257726762577267625772676257

MBh†

1225

AMPS*

HI PR

LO PR

MBh†

1400

AMPS* 12.86 12.78 12.72 12.71 14.20 14.12 14.07 14.06 15.68 15.61 15.56 15.56 17.34 17.27 17.24 17.24 19.14 19.09 19.07 19.07

HI PR

LO PR

MBh†

1575

AMPS*

HI PR

LO PR

If additional tubing length and/or indoor unit is located above outdoor unit, a slight variation in capacity may occur.

If additional tubing length and/or indoor unit is located above outdoor unit, a slight variation in capacity may occur.

46.73 42.85 39.35 38.30 44.70 40.97 37.65 36.91 42.56 38.98 35.87 35.44 40.30 36.89 34.03 33.88 37.86 34.65 32.16 32.18

S/T‡

S/T‡

S/T‡

0.49 0.66 0.86 1.00 0.50 0.67 0.87 1.00 0.51 0.69 0.89 1.00 0.52 0.71 0.92 1.00 0.53 0.73 1.00 1.00

12.56 12.49 12.42 12.41 13.91 13.83 13.77 13.76 15.39 15.32 15.27 15.26 17.05 16.99 16.94 16.94 18.86 18.81 18.77 18.77
278 274 271 270 322 318 314 313 370 365 361 361 421 416 412 412 475 470 467 467
152 139 127 124 154 141 129 127 156 143 132 130 159 145 134 134 161 148 138 138

47.42 43.52 40.18 39.77 45.31 41.57 38.46 38.29 43.09 39.50 36.65 36.71 40.75 37.35 35.04 35.04 38.23 35.04 33.24 33.24

0.51 0.69 0.90 1.00 0.52 0.70 0.91 1.00 0.52 0.72 1.00 1.00 0.53 0.74 1.00 1.00 0.55 0.77 1.00 1.00

280 275 272 272 323 319 315 315 371 366 362 362 422 417 414 414 476 471 469 469
155 142 131 129 157 144 133 133 159 146 136 136 161 148 139 139 164 151 143 143

47.94 44.03 40.98 40.96 45.76 42.02 39.39 39.40 43.48 39.90 37.73 37.74 41.08 37.70 35.97 35.98 38.49 35.34 34.07 34.07

0.52 0.72 0.99 1.00 0.53 0.74 1.00 1.00 0.54 0.75 1.00 1.00 0.55 0.78 1.00 1.00 0.57 0.80 1.00 1.00

13.15 13.07 13.01 13.01 14.49 14.41 14.36 14.36 15.97 15.90 15.86 15.86 17.62 17.56 17.53 17.53 19.43 19.38 19.36 19.36
280 276 273 273 324 320 317 317 372 367 364 364 423 418 415 415 477 472 470 470
158 144 134 134 160 146 137 137 162 148 141 141 164 151 144 144 166 153 148 148

TECHNICAL SUPPORT MANUAL Split System Air Conditioner: R4A3, WCA3**4

Sensible Capacity at Indoor db LOWER than 80 ° F = ( MBh x S/T ) −

Sensible Capacity at Indoor db HIGHER than 80 ° F = ( MBh x S/T ) +

( 80 − Indoor db ) x 835 x Indoor CFM

(

( Indoor db − 80 ) x 835 x Indoor CFM

(

1000

1000

)
)

421 04 6001 00 9

48 Size Outdoor With ED*4X48J** Indoor Cooling

Outdoor Ambient Temperature − Degrees F, Dry Bulb

511501595857

Entering Indoor Temperature − Degrees F, Wet Bulb

CFM 7267625772676257726762577267625772676257

MBh† 54.60 49.83 45.55 44.50 52.26 47.64 43.56 42.88 49.78 45.33 41.50 41.17 47.16 42.89 39.36 39.35 44.34 40.29 37.40 37.40

S/T‡

1400

AMPS*

HI PR

LO PR

MBh†

S/T‡

1600

AMPS*

HI PR

LO PR

MBh†

S/T‡

1800

AMPS*

HI PR

LO PR

† Total capacities are net (I.D. blower heat subtracted) system capacities based on 25’ line set.

If additional tubing length and/or indoor unit is located above outdoor unit, a slight variation in capacity may occur.

†† At TVA rating indoor condition (75 °F db, 63 °F wb), all other indoor air temperatures are at 80 ° F db

If additional tubing length and/or indoor unit is located above outdoor unit, a slight variation in capacity may occur.

^ System amps are total of indoor and outdoor amps.

‡ Chart data is for 80° F indoor dry bulb. For indoor db temperatures other than 80° F, measure Indoor db and Indoor CFM, and plug these into the
formula below. Measure outdoor db and indoor wet bulb, apply these to the chart above, find MBh and S/T, and plug these into the formula below.
(Note: if indoor db is the only thing changing, total capacity, MBh, stays the same.)

0.51 0.68 0.89 1.00 0.51 0.70 0.91 1.00 0.52 0.71 0.93 1.00 0.53 0.73 1.00 1.00 0.54 0.75 1.00 1.00

14.51 14.47 14.45 14.45 16.11 16.07 16.05 16.05 17.88 17.85 17.83 17.83 19.84 19.81 19.80 19.80 21.99 21.97 21.97 21.97
294 290 286 285 339 335 331 330 389 384 380 380 444 439 435 435 503 498 495 495
154 141 129 126 156 143 131 129 158 145 134 133 160 147 136 136 163 150 140 140

55.49 50.68 46.57 46.24 53.07 48.40 44.58 44.52 50.49 46.00 42.69 42.69 47.77 43.48 40.76 40.76 44.86 40.81 38.69 38.69

0.52 0.71 0.93 1.00 0.53 0.73 0.99 1.00 0.54 0.75 1.00 1.00 0.55 0.77 1.00 1.00 0.56 0.79 1.00 1.00

14.85 14.81 14.79 14.79 16.45 16.41 16.39 16.39 18.22 18.18 18.17 18.17 20.18 20.15 20.14 20.14 22.32 22.31 22.30 22.30
295 291 287 287 341 336 332 332 390 385 382 382 445 440 437 437 504 499 497 497
157 144 133 132 159 146 135 135 161 148 138 138 163 150 142 142 166 152 145 145

56.14 51.29 47.65 47.66 53.64 48.95 45.85 45.85 50.99 46.49 43.93 43.94 48.20 43.92 41.90 41.90 45.21 41.18 39.72 39.72

0.54 0.75 1.00 1.00 0.55 0.76 1.00 1.00 0.56 0.78 1.00 1.00 0.57 0.81 1.00 1.00 0.59 0.84 1.00 1.00

15.19 15.15 15.13 15.13 16.78 16.75 16.73 16.73 18.55 18.52 18.50 18.50 20.51 20.48 20.47 20.47 22.66 22.64 22.64 22.64
295 291 288 288 341 337 334 334 391 386 384 384 446 441 438 438 505 500 498 498
160 147 137 137 162 148 140 140 164 150 143 143 166 152 146 146 168 155 150 150

TECHNICAL SUPPORT MANUAL Split System Air Conditioner: R4A3, WCA3**4

Sensible Capacity at Indoor db LOWER than 80 ° F = ( MBh x S/T ) −

Sensible Capacity at Indoor db HIGHER than 80 ° F = ( MBh x S/T ) +

( 80 − Indoor db ) x 835 x Indoor CFM

(

( Indoor db − 80 ) x 835 x Indoor CFM

(

1000

1000

)
)

10 421 04 6001 00

† Total capacities are net (I.D. blower heat subtracted) system capacities based on 25’ line set.

†† At TVA rating indoor condition (75 °F db, 63 °F wb), all other indoor air temperatures are at 80 ° F db

^ System amps are total of indoor and outdoor amps.

‡ Chart data is for 80° F indoor dry bulb. For indoor db temperatures other than 80° F, measure Indoor db and Indoor CFM, and plug these into the
formula below. Measure outdoor db and indoor wet bulb, apply these to the chart above, find MBh and S/T, and plug these into the formula below.
(Note: if indoor db is the only thing changing, total capacity, MBh, stays the same.)

60 Size Outdoor With ED*4X60L** Indoor Cooling

Outdoor Ambient Temperature − Degrees F, Dry Bulb

511501595857

Entering Indoor Temperature − Degrees F, Wet Bulb

CFM 7267625772676257726762577267625772676257

MBh†

1750

AMPS*

HI PR

LO PR

MBh†

2000

AMPS* 18.57 18.36 18.19 18.17 20.55 20.34 20.17 20.17 22.74 22.53 22.38 22.38 25.16 24.96 24.84 24.84 27.82 27.64 27.54 27.54

HI PR

LO PR

MBh†

2250

AMPS*

HI PR

LO PR

If additional tubing length and/or indoor unit is located above outdoor unit, a slight variation in capacity may occur.

If additional tubing length and/or indoor unit is located above outdoor unit, a slight variation in capacity may occur.

67.21 61.78 56.85 55.51 64.33 59.11 54.44 53.53 61.25 56.26 51.89 51.41 57.99 53.27 49.28 49.17 54.51 50.10 46.74 46.74

S/T‡

S/T‡

S/T‡

0.51 0.68 0.88 1.00 0.51 0.69 0.90 1.00 0.52 0.71 0.92 1.00 0.53 0.73 0.94 1.00 0.54 0.75 1.00 1.00

18.11 17.91 17.74 17.69 20.10 19.90 19.72 19.69 22.29 22.09 21.91 21.90 24.72 24.53 24.37 24.36 27.38 27.21 27.07 27.07
304 299 294 293 350 345 340 339 401 394 389 388 455 449 443 443 514 507 502 502
155 142 130 127 157 144 132 130 160 146 134 133 162 148 137 137 164 151 141 141

68.22 62.74 58.02 57.57 65.20 59.96 55.58 55.46 62.01 57.00 53.19 53.20 58.62 53.90 50.79 50.80 55.02 50.62 48.19 48.19

0.52 0.71 0.92 1.00 0.53 0.73 0.94 1.00 0.54 0.75 1.00 1.00 0.55 0.77 1.00 1.00 0.56 0.79 1.00 1.00

305 300 295 295 352 346 341 341 402 396 391 391 456 450 446 446 515 509 505 505
159 145 134 133 161 147 136 136 163 149 139 139 165 151 142 142 167 154 146 146

68.93 63.43 59.25 59.25 65.81 60.56 57.01 57.01 62.53 57.53 54.62 54.62 59.04 54.34 52.11 52.12 55.34 50.99 49.36 49.36

0.54 0.74 1.00 1.00 0.55 0.76 1.00 1.00 0.56 0.78 1.00 1.00 0.57 0.81 1.00 1.00 0.59 0.83 1.00 1.00

19.00 18.80 18.65 18.64 20.98 20.78 20.64 20.64 23.17 22.96 22.85 22.85 25.59 25.39 25.31 25.31 28.24 28.07 28.01 28.01
306 301 297 297 353 347 343 343 403 397 393 393 458 451 448 448 516 510 507 507
162 148 138 138 163 150 141 141 165 152 144 144 167 154 147 147 169 156 151 151

TECHNICAL SUPPORT MANUAL Split System Air Conditioner: R4A3, WCA3**4

Sensible Capacity at Indoor db LOWER than 80 ° F = ( MBh x S/T ) −

Sensible Capacity at Indoor db HIGHER than 80 ° F = ( MBh x S/T ) +

( 80 − Indoor db ) x 835 x Indoor CFM

(

( Indoor db − 80 ) x 835 x Indoor CFM

(

1000

1000

)
)

421 04 6001 00 11

COOLING Multiplying Factors for other Indoor Combinations

TECHNICAL SUPPORT MANUAL Split System Air Conditioner: R4A3, WCA3**4

Indoor
Model

Furnace

Model

Capac. (MBh) Power (AMPS)

Indoor
Model

Furnace

Model

Capac. (MBh) Power (AMPS)

Indoor
Model

Furnace

Model

Capac. (MBh) Power (AMPS)

R4A318

*ED*4X18B** 1.00 1.00 FEM4P30**A* 1.03 1.02 FXM4X18**A* 1.03 0.94

FEM4P18**A* 1.02 0.93 FS(M,U)4P18**A* 1.02 1.01 FXM4X24**A* 1.03 0.94

FEM4P24**A* 1.02 0.93 FS(M,U)4P24**A* 1.02 1.01 FXM4X30**A* 1.03 0.94

R4A324

*ED*4X24B** 1.00 1.00 FS(M,U)4P24**A* 1.01 1.01 FXM4X30**A* 1.03 0.98

FEM4P24**A* 1.00 1.00 FS(M,U)4P30**A* 1.02 0.97 FXM4X36**A* 1.03 0.95

FEM4P30**A* 1.02 0.93 FXM4X24**A* 1.02 0.93

R4A330

*ED*4X30B** 1.00 1.00 FEM4P42**A* 1.03 1.01 FXM4X30**A* 1.03 0.97

FEM4P30**A* 1.01 1.00 FS(M,U)4P30**A* 1.01 1.00 FXM4X36**A* 1.04 0.93

FEM4P36**A* 1.01 1.00 FS(M,U)4P36**A* 1.01 1.00 FXM4X42**A* 1.04 1.02

R4A336

*ED*4X48J** 1.00 1.00 ED*4X48L** *9MVX100 0.98 0.94 EHD4X48A** *9MVX060 0.98 0.98

ED*4X42F** *8MPV075 0.98 0.98 ED*4X48L** MV20L24**B* 0.98 0.93 EHD4X48A** *9MVX080 0.98 0.98

ED*4X42F** *9MPV075 0.98 0.98 EHD4X42A** *8MPV050 0.98 0.98 EHD4X48A** *9MVX100 0.98 0.94

ED*4X42F** *9MVX060 0.98 0.98 EHD4X42A** *8MPV075 0.98 0.98 EHD4X48A** MV12F19**B* 0.98 0.94

ED*4X42F** MV12F19**B* 0.98 0.94 EHD4X42A** *8MPV100 0.98 0.94 EHD4X48A** MV16J22**B* 0.98 0.94

ED*4X42J** *8MPV100 0.98 0.94 EHD4X42A** *8MPV125 0.98 0.94 EHD4X48A** MV20L24**B* 0.98 0.94

ED*4X42J** *8MPV125 0.98 0.94 EHD4X42A** *9MPV050 0.98 0.98 EMA4X48D** 1.00 1.00

ED*4X42J** *9MPV100 0.98 0.98 EHD4X42A** *9MPV075 0.98 0.98 FEA4X36**A* 0.97 106764.70

ED*4X42J** *9MVX080 0.98 0.98 EHD4X42A** *9MPV100 0.98 0.94 FEM4P36**A* 0.98 0.98

ED*4X42J** MV16J22**B* 0.98 0.94 EHD4X42A** *9MPV125 0.98 0.94 FEM4P42**A* 1.01 0.97

ED*4X42L** *9MPV125 0.98 0.94 EHD4X42A** *9MVX040 0.98 0.98 FEM4P48**A* 1.01 0.97

> Indicates Tested Indoor Model

- continued on next page -

12 421 04 6001 00

COOLING Multiplying Factors for other Indoor Combinations (continued)

Indoor
Model

ED*4X42L** *9MVX100 0.98 0.94 EHD4X42A** *9MVX060 0.98 0.98 FEM4X36**** 1.00 1.00

ED*4X42L** MV20L24**B* 0.98 0.94 EHD4X42A** *9MVX080 0.98 0.94 FEM4X42**** 1.00 1.00

ED*4X48F** 1.00 1.00 EHD4X42A** *9MVX100 0.98 0.94 FEM4X48**** 1.00 1.00

ED*4X48F** *8MPV075 0.98 0.98 EHD4X42A** MV08B15**B* 0.98 0.94 FS(M,U)4P36**A* 0.99 0.99

ED*4X48F** *9MPV075 0.98 0.98 EHD4X42A** MV12F19**B* 0.98 0.94 FS(M,U)4P42**A* 1.00 1.00

ED*4X48F** *9MVX060 0.98 0.98 EHD4X42A** MV16J22**B* 0.98 0.94 FS(M,U)4X48**** 1.00 1.00

ED*4X48F** MV12F19**B* 0.98 0.94 EHD4X42A** MV20L24**B* 0.98 0.94 FVM4X24**** 0.98 0.98

ED*4X48J** *8MPV100 0.98 0.94 EHD4X48A** 1.00 1.00 FVM4X36**** 0.98 0.94

ED*4X48J** *8MPV125 0.98 0.94 EHD4X48A** *8MPV075 0.98 0.98 FVM4X48**** 1.00 0.92

ED*4X48J** *9MPV100 0.98 0.98 EHD4X48A** *8MPV100 0.98 0.94 FVM4X60**** 1.02 0.94

ED*4X48J** *9MVX080 0.98 0.98 EHD4X48A** *8MPV125 0.98 0.94 FXM4X36**A* 1.01 0.97

ED*4X48J** MV16J22**B* 0.98 0.93 EHD4X48A** *9MPV075 0.98 0.98 FXM4X42**A* 1.01 0.97

ED*4X48L** 1.00 1.00 EHD4X48A** *9MPV100 0.98 0.94 FXM4X48**A* 1.03 0.94

ED*4X48L** *9MPV125 0.98 0.94 EHD4X48A** *9MPV125 0.98 0.94

Furnace

Model

Power (AMPS)Capac. (MBh)

Indoor
Model

Furnace

Model

Power (AMPS)Capac. (MBh)

Indoor
Model

Furnace

Model

R4A342

*ED*4X42J** 1.00 1.00 ED*4X48J** MV16J22**B* 1.01 0.97 EHD4X48A** *9MPV100 1.01 0.97

ED*4X42F** 1.00 1.00 ED*4X48L** 1.01 1.01 EHD4X48A** *9MPV125 1.01 0.97

ED*4X42F** *8MPV075 1.00 1.00 ED*4X48L** *9MPV125 1.01 0.97 EHD4X48A** *9MVX060 1.01 1.01

ED*4X42F** MV12F19**B* 1.00 0.96 ED*4X48L** *9MVX100 1.01 0.97 EHD4X48A** *9MVX080 1.01 0.97

ED*4X42J** *8MPV100 1.00 1.00 ED*4X48L** MV20L24**B* 1.01 0.97 EHD4X48A** *9MVX100 1.01 0.97

ED*4X42J** *8MPV125 1.00 0.96 EHD4X42A** 1.00 1.00 EHD4X48A** MV12F19**B* 1.01 0.97

ED*4X42J** *9MPV100 1.00 1.00 EHD4X42A** *8MPV075 1.00 1.00 EHD4X48A** MV16J22**B* 1.01 0.97

ED*4X42J** *9MVX080 1.00 1.00 EHD4X42A** *8MPV100 1.00 0.96 EHD4X48A** MV20L24**B* 1.01 0.97

ED*4X42J** MV16J22**B* 1.00 0.96 EHD4X42A** *8MPV125 1.00 0.96 EMA4X48D** 1.01 1.01

TECHNICAL SUPPORT MANUAL Split System Air Conditioner: R4A3, WCA3**4

Power (AMPS)Capac. (MBh)

> Indicates Tested Indoor Model

- continued on next page -

421 04 6001 00 13

COOLING Multiplying Factors for other Indoor Combinations (continued)

Indoor
Model

ED*4X42L** 1.00 1.00 EHD4X42A** *9MPV075 1.00 1.00 FEM4P42**A* 1.04 1.04

ED*4X42L** *9MPV125 1.00 1.00 EHD4X42A** *9MPV100 1.00 1.00 FEM4P48**A* 1.04 0.99

ED*4X42L** *9MVX100 1.00 1.00 EHD4X42A** *9MPV125 1.00 0.96 FEM4P60**A* 1.05 0.96

ED*4X42L** MV20L24**B* 1.00 0.96 EHD4X42A** *9MVX060 1.00 1.00 FEM4X42**** 1.00 1.00

ED*4X48F** 1.00 1.00 EHD4X42A** *9MVX080 1.00 1.00 FEM4X48**** 1.01 0.97

ED*4X48F** *8MPV075 1.00 1.00 EHD4X42A** *9MVX100 1.00 0.96 FS(M,U)4P42**A* 1.04 1.04

ED*4X48F** *9MPV075 1.00 1.00 EHD4X42A** MV12F19**B* 1.00 0.96 FS(M,U)4P48**A* 1.05 1.05

ED*4X48F** *9MVX060 1.00 1.00 EHD4X42A** MV16J22**B* 1.00 0.96 FS(M,U)4X42**** 1.00 1.00

ED*4X48F** MV12F19**B* 1.00 0.96 EHD4X42A** MV20L24**B* 1.00 0.96 FS(M,U)4X48**** 1.01 1.01

ED*4X48J** 1.01 1.01 EHD4X48A** 1.01 1.01 FVM4X36**** 1.00 0.96

ED*4X48J** *8MPV100 1.01 0.97 EHD4X48A** *8MPV075 1.01 1.01 FVM4X48**** 1.03 0.94

ED*4X48J** *8MPV125 1.01 0.97 EHD4X48A** *8MPV100 1.01 0.97 FVM4X60**** 1.04 0.95

ED*4X48J** *9MPV100 1.01 1.01 EHD4X48A** *8MPV125 1.01 0.97 FXM4X42**A* 1.04 0.99

ED*4X48J** *9MVX080 1.01 1.01 EHD4X48A** *9MPV075 1.01 1.01 FXM4X48**A* 1.05 0.96

Furnace

Model

Power (AMPS)Capac. (MBh)

Indoor
Model

Furnace

Model

Power (AMPS)Capac. (MBh)

Indoor
Model

FXM4X60**A* 1.06 0.97

Furnace

Model

Power (AMPS)Capac. (MBh)

TECHNICAL SUPPORT MANUAL Split System Air Conditioner: R4A3, WCA3**4

R4A348

*ED*4X48J** 1.00 1.00 ED*4X60L** *9MPV125 1.00 1.00 EHD4X60A** *9MPV125 1.01 1.01

ED*4X48F** 0.98 0.98 ED*4X60L** *9MVX100 1.00 1.00 EHD4X60A** *9MVX080 1.01 1.01

ED*4X48J** *8MPV100 0.98 0.98 ED*4X60L** MV20L24**B* 1.00 0.96 EHD4X60A** *9MVX100 1.01 1.01

ED*4X48J** *8MPV125 0.98 0.98 EHD4X48A** 1.00 1.00 EHD4X60A** MV16J22**B* 1.01 0.97

ED*4X48J** MV16J22**B* 0.98 0.94 EHD4X48A** *8MPV100 1.00 1.00 EHD4X60A** MV20L24**B* 1.01 0.97

ED*4X48L** 1.00 1.00 EHD4X48A** *8MPV125 1.00 1.00 EMA4X48D** 0.98 0.98

ED*4X48L** *9MPV125 0.99 0.99 EHD4X48A** *9MPV100 0.99 0.99 FEM4P48**A* 0.99 0.99

ED*4X48L** *9MVX100 0.99 0.99 EHD4X48A** *9MPV125 0.99 0.99 FEM4P60**A* 1.00 1.00

> Indicates Tested Indoor Model

- continued on next page -

14 421 04 6001 00

COOLING Multiplying Factors for other Indoor Combinations (continued)

Indoor
Model

ED*4X48L** MV20L24**B* 0.99 0.95 EHD4X48A** *9MVX080 1.00 1.00 FEM4X48**** 1.00 1.00

ED*4X60J** 1.00 1.00 EHD4X48A** *9MVX100 0.99 0.99 FEM4X60**** 1.01 0.97

ED*4X60J** *8MPV100 1.00 1.00 EHD4X48A** MV16J22**B* 1.00 0.96 FS(M,U)4P48**A* 1.00 1.00

ED*4X60J** *8MPV125 1.00 0.96 EHD4X48A** MV20L24**B* 1.00 0.96 FS(M,U)4X48**** 1.00 1.00

ED*4X60J** *9MPV100 1.00 1.00 EHD4X60A** 1.01 1.01 FS(M,U)4X60**** 1.01 1.01

ED*4X60J** *9MVX080 1.00 1.00 EHD4X60A** *8MPV100 1.01 1.01 FVM4X48**** 1.00 0.96

ED*4X60J** MV16J22**B* 1.00 0.96 EHD4X60A** *8MPV125 1.01 0.97 FVM4X60**** 1.01 0.93

ED*4X60L** 1.00 1.00 EHD4X60A** *9MPV100 1.01 1.01 FXM4X48**A* 1.01 0.97

Furnace

Model

Power (AMPS)Capac. (MBh)

Indoor
Model

Furnace

Model

Power (AMPS)Capac. (MBh)

Indoor
Model

FXM4X60**A* 1.02 0.94

Furnace

Model

R4A360

*ED*4X60L** 1.00 1.00 EHD4X60A** 1.00 1.00 FEM4X60**** 1.01 1.01

ED*4X60J** 0.99 0.99 EHD4X60A** MV16J22**B* 1.00 1.00 FVM4X60**** 1.01 1.01

ED*4X60J** MV16J22**B* 0.99 0.99 EHD4X60A** MV20L24**B* 1.00 1.00 FXM4X60**A* 1.01 1.01

ED*4X60L** MV20L24**B* 0.99 0.99 FEM4P60**A* 1.00 1.00

> Indicates Tested Indoor Model

TECHNICAL SUPPORT MANUAL Split System Air Conditioner: R4A3, WCA3**4

Power (AMPS)Capac. (MBh)

421 04 6001 00 15

COOLING Multiplying Factors for other Indoor Combinations

TECHNICAL SUPPORT MANUAL Split System Air Conditioner: R4A3, WCA3**4

Indoor
Model

Capac. (MBh) Power (AMPS)

Indoor
Model

Capac. (MBh) Power (AMPS)

Indoor
Model

Capac. (MBh) Power (AMPS)

WCA3184

>W*A*184AA* 1.00 1.00 W*NC184AA* 1.00 1.00 W*NH244BA* 1.00 0.99

W*A*244AA* 1.00 0.99 W*NC244AA* 1.00 1.00 WAH*244A* 1.00 0.91

W*A*244BA* 1.00 1.00 W*NC244BA* 1.00 0.99 WAH*244A* 1.00 0.91

WCA3244

>W*A*244AA* 1.00 1.00 W*NC244AA* 1.00 1.00 W*NH244BA* 1.00 1.00

W*A*244BA* 1.00 1.00 W*NC244BA* 1.00 1.00 W*NH304BA* 1.00 1.00

W*A*304AA* 1.00 1.00 W*NC304AA* 1.00 1.00 WAH*244A* 1.00 0.96

W*A*304BA* 1.00 1.00 W*NC304BA* 1.00 1.00 WAH*304A* 1.00 0.92

WCA3304

>W*A*304AA* 1.00 1.00 W*NC304AA* 1.00 1.00 W*NH364BA* 1.00 1.00

W*A*304BA* 1.00 1.00 W*NC304BA* 1.00 1.00 WAH*304A* 1.00 0.94

W*A*364AA* 1.00 1.00 W*NC364BA* 1.00 1.00 WAH*364A* 1.00 0.98

W*A*364BA* 1.00 1.00 W*NC364CA* 1.00 1.00

W*A*364CA* 1.00 1.00 W*NH304BA* 1.00 1.00

WCA3364

>W*A*484CA* 1.00 1.00 W*NC424CA* 0.97 0.97 W*NH484DA* 1.00 1.00

W*A*484BA* 1.00 1.00 W*NC484CA* 1.00 1.00 WAH*424A* 0.97 0.97

W*A*484CA* 1.00 1.00 W*NC484DA* 1.00 1.00 WAH*484A* 1.00 1.00

W*A*484DA* 1.00 1.00 W*NH424CA* 0.97 0.97

WCA3424

>W*A*424CA* 1.00 1.00 W*A*484DA* 1.01 1.01 W*NC484CA* 1.01 1.01

W*A*424DA* 1.00 1.00 W*NH424CA* 1.00 1.00 W*NC484DA* 1.01 1.01

W*A*484BA* 1.01 1.01 W*NH484DA* 1.01 1.01 WAH*424A* 1.00 0.96

W*A*484CA* 1.01 1.01 W*NC424CA* 1.00 1.00 WAH*484A* 1.01 0.93

> Indicates Tested Indoor Model

- continued on next page -

16 421 04 6001 00

COOLING Multiplying Factors for other Indoor Combinations (continued)

Indoor
Model

Capac. (MBh) Power (AMPS)

Indoor
Model

Capac. (MBh) Power (AMPS)

Indoor
Model

Capac. (MBh) Power (AMPS)

WCA3484

>W*A*484CA* 1.00 1.00 W*A*604DA* 1.01 1.01 W*NH484DA* 1.00 1.00

W*A*484BA* 0.98 0.98 W*NC484CA* 1.00 1.00 W*NH604DA* 1.01 1.01

W*A*484DA* 1.00 1.00 W*NC484DA* 1.00 1.00 WAH*484A* 1.00 0.96

W*A*604CA* 1.01 1.01 W*NC604DA* 1.01 1.01 WAH*604A* 1.01 0.97

WCA3604

>W*A*604DA* 1.00 1.00 W*NC604DA* 1.00 1.00 WAH*604A* 1.00 0.96

W*A*604CA* 0.98 0.98 W*NH604DA* 1.00 1.00

> Indicates Tested Indoor Model

TECHNICAL SUPPORT MANUAL Split System Air Conditioner: R4A3, WCA3**4

TECHNICAL SUPPORT MANUAL Split System Air Conditioner: R4A3, WCA3**4

OUTDOOR UNIT MODEL NUMBER IDENTIFICATION GUIDE (single phase)

Digit Position: 1 2 3 4 5, 6 7 8 9 10 11 12

Example Part Number:

Product Family
2 = R−22
4 = R−410A REFRIGERANT
A = Air Conditioner
H = Heat Pump TYPE
3 = 13 SEER
4 = 14 SEER NOMINAL EFFICIENCY
18 = 18,000 BTUH = 1½ tons
24 = 24,000 BTUH = 2 tons
30 = 30,000 BTUH = 2½ tons
36 = 36,000 BTUH = 3 tons
42 = 42,000 BTUH = 3½ tons
48 = 48,000 BTUH = 4 tons
60 = 60,000 BTUH = 5 tons NOMINAL CAPACITY
A = Standard Grille

G = Coil Guard Grille FEATURES

K = 208/230−1−60 VOLTAGE

Sales Code

Engineering Revision

Extra Digit

Extra Digit

R 4 A 3 18 A K A 1 0 0

OUTDOOR UNIT MODEL NUMBER IDENTIFICATION GUIDE (single phase)

Digit Position: 1,2 3 4 5,6 7 8 9 10 11

Example Part Number:

WC = Condensing Unit
A = Air Conditioner
H = Heat Pump TYPE
3 = 13 SEER
4 = 14 SEER SEER
18 = 18,000 BTUH = 1½ tons
24 = 24,000 BTUH = 2 tons
30 = 30,000 BTUH = 2½ tons
36 = 36,000 BTUH = 3 tons
42 = 42,000 BTUH = 3½ tons
48 = 48,000 BTUH = 4 tons
60 = 60,000 BTUH = 5 tons NOMINAL CAPACITY
2 = R−22
4 = R−410A REFRIGERANT
A = Standard Grille

G = Coil Guard Grille FEATURE

K = 208/230−1−60 VOLTAGE

Sales Code

Extra Digit

WC A 3 24 4 G K A 1

421 04 6001 00 17

TECHNICAL SUPPORT MANUAL Split System Air Conditioner: R4A3, WCA3**4

ACCESSORIES PART NUMBER IDENTIFICATION GUIDE

Digit Position: 1 2 3 4 5 6, 7 8, 9 10, 11

Example Part Number:

N = Non−Branded BRANDING

A = Accessory PRODUCT GROUP

S = Split System (AC & HP) KIT USAGE
A = Original
B = 2nd Generation MAJOR SERIES
0 = Generic or Not Applicable
2 = R−22
4 = R−410A REFRIGERANT
Product Identifier Number
Package Quantity
Type of Kit

(Example: CH = Crankcase Heater)

N A S A 0 0 1 01 C H

International Comfort Products, LLC

Lewisburg, Tennessee 37091 USA

18 421 04 6001 00