38VYM
R-410A
GB - 3
E N G L I S H
Connections and operating limits
Connections
Table II: Operating limits
WARNING:
During heat pump operation the unit will undergo several defrost cycles to
eliminate ice that might collect on the outdoor unit at very low ambient
temperatures.
In these cycles, fan speed will automatically reduce or stop and cannot be
changed until defrost cycle is completed.
d.b. - dry bulb
w.b. - wet bulb
1)
38VYM-18: 15
°
C
2)
38VYM-18: –5
°
C
Cooling
Maximum conditions
Outdoor temperature 43
°
C
Indoor temperature 32
°
C d.b.; 23
°
C w.b.
Minimum conditions
Outdoor temperature 10
°
C
(1)
Indoor temperature 21
°
C d.b.; 15
°
C w.b.
Heating
Maximum conditions
Outdoor temperature 24
°
C d.b.; 18
°
C w.b.
Indoor temperature 27
°
C d.b.
Minimum conditions
Outdoor temperature –10
°
C
(2)
Mains power supply
Nominal single-phase voltage
230V ~ 50 Hz
Operating voltage limits
min. 198V – max. 264V
햲
Outdoor unit
햳
Indoor unit A1
햴
Indoor unit A2
햵
Indoor unit A3
햶
Indoor unit A4
IMPORTANT:
Additional refrigerant charge is unnecessary.
This air conditioner is designed with chargeless specification.
For 38VYM-28 and 38VYM-32 models, connection of only one
indoor unit is not allowed.
Two or more units must be connected.
햲
햶
햵
A4
A3
햴
A2
햳
A1
H
Table I: Connections
38VYM
18
28
32
Indoor unit
A1-A2
A1-A2-A3 A1-A2-A3-A4
Max. height difference
H m
10
15
15
Pipe length
Max m
20
25
25
per unit
Min
m
2
2
2
Total pipe length
Max
m
30
50
70
(Minimum number of bends possible)
Minimum number of indoor units
1
2
2
to be connected
(note)
Note: when only one indoor unit is connected, the connection pipe must have
a minimum length of 5 m.
Pipe diameter
Liquid
Gas
Indoor
(Liquid)
(Suction)
38VYM
unit
mm (inches)
mm (inches)
18
A1, A2
6.35 (1/4”)
9.52
(3/8”)
A1
6.35 (1/4”)
12.70 (1/2”) (note 1)
28
A2, A3
6.35 (1/4”)
9.52
(3/8”)
A1, A3
6.35 (1/4”)
12.70 (1/2”) (note 1)
32
A2, A4
6.35 (1/4”)
9.52
(3/8”)
Notes:
1)
When the indoor unit is as large as 009 or the model is 42HQM012,
use Ø 9,52 mm (3/8") pipes supplied with the flare tap adapter.
2)
All fittings are flare type.
3)
Use only refrigeration grade pipes, (Cu DHP type according to
ISO 1337), seamless, degreased, deoxidized and suitable for
operating pressures of at least 4200 kPa and with a burst pressure of
20700 kPa.
Under no circumstances must sanitary type copper pipe be used.
햲
햶
햵
A4
A3
햴
A2
H
햳
A1