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

4.72in(12cm).
7.55ft(2.3metres)
5.91in(15cm)
More than 11.8in(30cm)
More than 11.8in(30cm)
More than 78.7in ( 200cm)
More than 23.6in
(60cm)
of the unit is more than 11.8in(30cm) and left side is
more than 11.8in(30cm). The front of the unit should
have more than 78.7in(200cm) of clearance and the
connection side (right side) should have more
than 23.6in(60cm) of clearance.
6

User’s
p
Pipe size differs from appliance to appliance.
To meet different pipe size requirem ents, sometimes
the pipe connections need the transfer connector
to install on the outdoor unit .)
(Fasten it on the connective cable between the
indoor units and outdoor unit after installation.)
Except the above parts provided, the other parts needed for the installation must be purchased.
2.6in/65mm )
13lbf.ft/1.8kgf.m, 30.4lbf.ft/4.2kgf.m
39.8lbf.ft/5.5kgf.m , 47.7lbf.ft/6.6kgf.m
0.16in/4mm)
1/4(6.35)
3/8(9.52)
3/8(9.52)
1/2(12.7)
5/8(15.9)
7

This illustration is for illustration purposes only.
.
A minimum pipe run of 9.84ft(3m) is required
to
minimize vibration and excessive noise.
More than 4.7in
(
12cm)
More than 4.7in
(
12cm)
More than 78.7in
(
200cm)
More than 4.7in(
12cm)
More than
4.7in(12cm)
More than
4.7in(12cm)
More than
11.8in(
30cm)
More than
23.6in(
60cm)
More than 5.9in(15cm)
More than 23.6in
(
60cm)
3.9in(10cm)
More than
8

If the wall is made of brick, concrete
or a similar material , drill five or eight
5mm diameterholes in the wall.Insert
clip anchor for the appropriate mounting
screws.
units. See Fig.5 for example.
in(mm)
in(mm)
32.9x11(835x280)
39x12.4(990x315)
46.7x13.5(1186x343)
5.5(140)
10.2(260)
10.8(275)
4.3(110)
5.3(135)
10.8(275)
1.8/45
7.1/180 4.3/110
1.4/36.5
1.8/45
11/280
29.5/750
1.8/45 1.8/45
1.4/36.5
11/280
4.3/110
5.5/140
32.9/835
12.4/315
1.8/45
0.85/21.5
1.8/45
13.5/343
9

the
2.6in/65mm
0.2-0.28in(5-7mm)
When connecting the extension drain hose,
insulate the connecting part of the extension
drain hose with a shield pipe, do not let
the drain hose slack.
Fix the end of the connective pipe. (Refer
to the Tightening Connection in the
REFRIGERANT PIPING CONNECTION).
Because the condensed water from the rear of the
indoor unit is gathered in a ponding box and is
piped out of room. Do not put anything else in
the box.
Do not allow the piping to extend from
the back of the indoor unit.
Be careful not to let the drain hose slack.
Heat both of the insulated auxiliary pipes.
Be sure that the drain hose is located at
the lowest side of the bundle. Locating
at the upper side can cause the drain
pan to overflow inside the unit.
Never cross or twist the power
wire with any other wiring.
Run the drain hose sloped downward to
evenly drain the condensed water.
2.6in/65mm
10