Carrier 438MG series User manual

438MG / 40MA / 40MB
Multi-zone
18 to 48
SAFETY CONSIDERATIONS. . . . . . . . . . . . . . . . . . . . . . . . 2
SYSTEM REQUIREMENTS. . . . . . . . . . . . . . . . . . . . . . . . . 2
MODEL NUMBER NOMENCLATURE. . . . . . . . . . . . . . . . 3
SAFETY PRECAUTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
INSTALLATION INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . 6
REFRIGERANT PIPE CONNECTION. . . . . . . . . . . . . . . . . 29
ELECTRICAL WORK. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
AIR PURGING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
TEST RUNNING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

2

The first two digits indicate the equipment type.
40 = Indoor unit;
38 = Outdoor uni
Digit 5 indicates the system's type:
C = Cooling only;
Q = Heat pump
Maximum Number of fan coil units connected to the outdoor unit
B = 1:1
Digits 7, 8 indicate the system's capacity in 1000
BTU/Hr
Example: 09 = 9000 BTU/Hr
Digit 9 - Indoor Fan Coil Unit Type
B = High-Wall
C = Cassette
D = Ducted
F = Console
G = Underceiling
H = High Wall Color Variation
- = Outdoor
Digit 12 indicates voltage
1 = 115/l/60
3 = 208-230-1-60Hz
40 MA Q B 09 B -- 3
Digits 10, 11 - blank
Digits 3 and 4 represent the model
Model number Nomenclature

System
Tons System Btuh
1.5 18,000
27,000
36,000
48,000
208/230-1 38MGQC18---3
38MGQD27---3
38MGQF36---3
38MGQF48---3
208/230-12.25
Outdoor Model
Number
Volt- Ph @
60Hz
3208/230-1
208/230-14
Model Numbers
3

4

0.12in(3mm)
5