6
Marvair MGA3090-3180 Wall Mount AC I&O Manual 05/2023 Rev.14
1.2 Model Identification
The model identification number is found on the data sticker. Rating plate located on side panel.
Example
M
G
A
3
0
9
0
A
D
1
5
0
C
+
+
+
+
1
C
A
+
A
2
1
+
+
+
+
+
+
Position
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
1
Unit Designation/Family
M
= Marvair Wall Mount
2
Energy Efficiency Ratio (EER)
G
= 10
3
Refrigerant Type
A
= R-410a
4
Compressor Type/
Quantity
1
= Single
3
= Dual Compressors
5
Unit Capacity/Nominal
Cooling (BTUH)
090
= 90,000
150
= 150,000
120
= 120,000
180
= 180,000
6
7
8
System Type
A
= Air Conditioner
9
Power Supply
(Volts-Phase-Hz)
A
= 208/230-60-1
C
= 208/230-60-3
D
= 460-60-3
E
= 380-50-3 - 4 Wire
F
= 220-50-1
Z
= 575-60-3
10
Heat Designation
@ Rated Voltage
KW
= Kilowatt
000
= No Heat
050
= 5KW
090
= 9KW
150
= 15KW
180
= 18KW
11
12
13
Ventilation
Configuration
A
= Solid Front Door
C
= Economizer
D
= Motorized Damper w/Pressure Relief
E
= Motorized Damper w/Pressure
Relief & Independent Motorized
Damper Control
F
= No Free Cooling, 100% Emergency
Ventilation Only w/Independent Control
14
Dehumidification
R
= Electric Reheat
T
= Electric Reheat w/Humidity Control
+
= None
15
Controls
A
= Power Fail Alarm w/Additional Lockouts
C
= 24V EMS Relay Kit
D
= 24V EMS Relay Kit
w/Factory Installed T-Stat
E
= Factory Installed T-Stat
F
= ModBus Interface
G
= ModBus Interface
w/Factory Installed T-Stat
H
= Bac-Net
J
= Bac-Net Controls
w/Factory Installed T-Stat
+
= None
16
Operating Condition
A
= Evaporator Freeze Sensor (EFS)
C
= EFS w/Hot Gas Bypass
N
= Hard Start
P
= Hard Start w/Low Ambient & CCH
Q
= Hard Start w/Low Ambient &
Fan Cycle Control (FCC)
R
= Crank Case Heater (CCH)
T
= Hard Start w/EFS
U
= Hard Start w/Hot Gas Bypass
V
= Hard Start w/Low Ambient &
CCH & EFS
W
= Low Ambient w/CCH
X
= Hot Gas Bypass
Y
= Low Ambient w/CCH & FCC
Z
= Low Ambient w/CCH & EFS
1
= Low Ambient w/FCC
2
= Low Ambient w/FCC & EFS
3
= CCH w/Hot Gas Bypass
+
= None
17
Indoor Air Quality
Features
D
= Dry Bulb Sensor
E
= Dry Bulb Sensor w/Dirty Filter
G
= Dirty Filter Sensor
+
= None
18
Air Flow
1
= Top Supply/Bottom Return
2
= Center Supply (Reverse)
19
Compressor
Location
C
= Center
D
= Left Hand
E
= Right Hand
20
Filter Option
A
= 2” Pleated (MERV 8, AC/HP-C)
C
= 2” Charcoal
D
= MERV 11 High Filtration Package
E
= MERV 13 High Filtration Package
F
= Filter Access Through Return Air Grille
W
= Aluminum Washable
+
= None
21
Corrosion
Protection
A
= Condenser Coil Only
C
= Evaporator Coil Only
D
= Both Coils Condenser & Evaporator
E
= All Coils Cond/Evap/Reheat
F
= Coat All
K
= Coastal Package
+
= None
$
= Special
22
Engineering
Revision Level
A2
B2 B3
23
24
Cabinet Color
1
= Marvair Beige
2
= Gray
3
= Carlsbad Canyon
4
= White
5
= Stainless Steel Exterior
6
= Dark Bronze
7
= .050 Aluminum Stucco
8
= Mesa Tan
9
= Pebble Gray
A
= Stainless Steel - Unit
$
= Custom Color (Powder Coat)
25
Sound Attenuation
2
= Compressor Blanket
+
= None
26
Security Option
A
= Lockable Access Plate/Tamper Proof
+
= None
27
Fastener/Drain Pan
Option
A
= Stainless Steel Fasteners
C
= Stainless Steel Drain Pan
D
= Stainless Steel Fasteners & Drain Pan
E
= IP55 Ingress
+
= None
28
Unused
+
= None
$
= Special
29
Unused
+
= None
$
= Special
30
Special Variation
+
= None
$
= Special Configuration Not Covered by
Model Nomenclature
1.3
Serial Number Date Code
20 = 2020
01 = January
05 = May
09 = September
21 = 2021
02 = February
06 = June
10= October
22 = 2022
03= March
07 = July
11 = November
23 = 2023
04 = April
08 = August
12 = December
1.4
Capacities, Weights and Filter Sizes
See the Product Data Sheet for complete electrical and performance specifications and dimensional
drawings.