7
Marvair MGA3090-3180 Wall Mount AC I&O Manual 05/2023 Rev.14
Note:
Follow local codes and standards when designing duct runs to deliver the required airflow.
Minimize noise and excessive pressure drops caused by duct aspect ratio changes, bends, dampers and
outlet grilles in duct runs.
Model Number
Cooling BTUH
1
EER
2
Rated Air Flow (CFM)
3
MGA3090A
89,000
10
3,500
MGA3120A
118,000
10
4,000
MGA3150A
146,000
10
4,500
MGA3180A
182,000
10
6,000
1
Cooling rated at 95°F (35°C) outdoor and 80°F DB/67° WB (26.5°C DB/19.5°C WB) return air.
2
EER=Energy Efficiency Ratio
3
CFM=Cubic Feet per Minute
Ratings are with no outside air. Performance will be affected by altitude.
Ratings are at 230 volts for 208/230 volt units (“A” & “C” models) and 460 volts for “D” models. Operation of units at a different voltage
from that of the rating point will affect performance and air flow.
Table 1. Efficiency and Capacity Ratings at ANSI/AHRI Standard 390
Model Number
IWG Static Pressure
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
2.2
MGA3090A
3,846
3,570
3,286
3,003
2,722¹
2,515¹
2,164¹
1,888¹
1,612¹
1,338¹
1,065¹
794¹
MGA3120A
4,301
4,064
3,808
3,533
3,238
2,924¹
2,590¹
2,237¹
1,865¹
1,472¹
1,061¹
630¹
MGA3150A
4,801
4,564
4,308
4,033
3,738
3,424
3,090
2,737
2,365
1,972
1,561
1,130
MGA3180A
6,876
6,622
6,378
6,143
5,916
5,686
5,487
5,285
5,090
4,902
4,721
4,547
¹Operation in the shaded area is not recommended
Table 2. SCFM @ Various External Static Pressures
Model
Number
Return
Air
DB/WB
°F (°C)
Outdoor Temperature
Cooling
Capacity
BTUH
75°F
(24°C)
80°F
(27°C)
85°F
(30°C)
90°F
(32°C)
95°F
(35°C)
100°F
(38°C)
105°F
(41°C)
110°F
(43°C)
115°F
(46°C)
120°F
(49°C)
125°F
(52°C)
130°F
(54°C)
MGA3090A
72/61
(22/16)
Total
42,039 40,581 39,164 37,706 36,248 34,790 33,332 31,914 31,185 30,456 29,727 28,998
Sensible
37,564 37,021 36,494 35,953 35,414 34,790 33,332 31,914 31,185 30,456 29,727 28,998
76/63
(24/17)
Total
43,700 42,201 40,662 39,164 37,665 36,167 34,668 33,129 32,400 31,671 30,942 30,213
Sensible
41,395 40,856 40,305 39,164 37,665 36,167 34,668 33,129 32,400 31,671 30,942 30,213
80/67
(27/19)
Total
46,980 45,360 43,740 42,120 40,500 38,192 37,260 35,640 34,830 34,101 33,372 32,643
Sensible
40,841 40,300 39,761 39,224 38,688 37,926 37,260 35,640 34,830 34,101 33,372 32,643
84/71
(29/22)
Total
50,261 48,519 46,818 45,077 43,335 41,594 39,852 38,151 37,260 36,531 35,802 35,073
Sensible
40,097 39,560 39,037 38,503 37,970 37,438 36,908 36,392 36,122 35,901 35,681 35,073
MGA3120A
72/61
(22/16)
Total
61,242 59,118 57,053 54,929 52,805 50,681 48,557 46,492 45,430 44,368 43,306 42,244
Sensible
61,242 59,118 57,053 54,929 52,805 50,681 48,557 46,492 45,430 44,368 43,306 42,244
76/63
(24/17)
Total
63,661 61,478 59,236 57,053 54,870 52,687 50,504 48,262 47,200 46,138 45,076 44,014
Sensible
63,661 61,478 59,236 57,053 54,870 52,687 50,504 48,262 47,200 46,138 45,076 44,014
80/67
(27/19)
Total
68,440 66,080 63,720 61,360 59,000 56,640 54,280 51,920 50,740 49,678 48,616 47,554
Sensible
68,440 66,080 63,720 61,360 59,000 56,640 54,280 51,920 50,740 49,678 48,616 47,554
84/71
(29/22)
Total
73,219 70,682 68,204 65,667 63,130 60,593 58,056 55,578 54,280 53,218 52,156 51,094
Sensible
72,324 70,682 68,204 65,667 63,130 60,593 58,056 55,578 54,280 53,218 52,156 51,094
MGA3150A
72/61
(22/16)
Total
75,809 73,180 70,623 67,994 65,365 62,736 60,107 57,550 56,236 54,921 53,607 52,292
Sensible
75,809 73,180 70,623 67,994 65,365 62,736 60,107 57,550 56,236 54,921 53,607 52,292
76/63
(24/17)
Total
78,803 76,101 73,326 70,623 67,921 65,219 62,517 59,741 58,427 57,112 55,798 54,483
Sensible
78,803 76,101 73,326 70,623 67,921 65,219 62,517 59,741 58,427 57,112 55,798 54,483
80/67
(27/19)
Total
84,719 81,798 78,876 75,955 73,034 70,112 67,191 64,269 62,809 61,494 60,180 58,865
Sensible
84,374 81,798 78,876 75,955 73,034 70,112 67,191 64,269 62,809 61,494 60,180 58,865
84/71
(29/22)
Total
90,635 87,494 84,427 81,286 78,146 75,005 71,865 68,798 67,191 65,876 64,562 63,247
Sensible
83,360 82,358 81,383 80,389 78,146 75,005 71,865 68,798 67,191 65,876 64,562 63,247
MGA3180A
72/61
(22/16)
Total
94,458 91,182 87,997 84,721 81,445 78,169 74,893 71,708 70,070 68,432 66,794 65,156
Sensible
94,458 91,182 87,997 84,721 81,445 78,169 74,893 71,708 70,070 68,432 66,794 65,156
76/63
(24/17)
Total
98,189 94,822 91,364 87,997 84,630 81,263 77,896 74,438 72,800 71,162 69,524 67,886
Sensible
98,189 94,822 91,364 87,997 84,630 81,263 77,896 74,438 72,800 71,162 69,524 67,886
80/67
(27/19)
Total
105,560 101,920 98,280 94,640 91,000 87,360 83,720 80,080 78,260 76,622 74,984 73,346
Sensible
105,560 101,920 98,280 94,640 91,000 87,360 83,720 80,080 78,260 76,622 74,984 73,346
84/71
(29/22)
Total
112,931 109,018 105,196 101,283 97,370 93,457 89,544 85,722 83,720 82,082 80,444 78,806
Sensible
108,205 106,965 105,196 101,283 97,370 93,457 89,544 85,722 83,720 82,082 80,444 78,806
Table 3. Single Compressor Cooling Performance (BTUH) at Various Outdoor Temperatures
