5
English
G
Install the indoor unit more than 1 meter away from
any antenna or power lines or connecting wires used
for television, radio, telephone, security system, or
intercom. Electrical noise from any of these sources
may affect operation.
G
install in a sturdy manner to avoid increased operat-
ing noise.
Table 3
2-2. Embedding the Tubing and Wiring
G
Before beginning embedding installation work,
consult fully with agencies or offices related to the
building’s foundation, construction, electricity, and
water.
G
Wait to make connections to the embedded portion.
Each connection step is described later in this
manual.
G
Securely cover the end of the embedded tubing to
prevent intrusion of dirt or moisture.
G
If an embedded tube is to be left for a long time, fill
the tube with nitrogen and seal both ends securely.
If a tube is left open for an extended time, moisture
in the air inside the tubing may condense into water
droplets, and lead to water contamination of the
refrigerant circuit.
G
In order to prevent insulation breakdown and ground
faults, do not allow wiring ends to come in contact
with rainwater, or be subjected to condensation or
dew.
G
Apply sufficient thermal insulation to the refrigerant
tubing and drain pipes.
* If total tubing length becomes 45 to 60 m (max.) or 45 to 70 m (max.), charge additional refrigerant (R410A) by 20 g/m.
No additional charge of compressor oil is necessary.
Max. Allowable
Max. Allowable Total
Limit of
Limit of Elevation
Required Amount
Tubing Length
Tubing Length Total Tubing Length
Difference of
Additional
Model
per unit
at shipment
(L1+L2) or (L1+L2+L3)
(H1, H2, H3, H4)
Refrigerant
(m)
(L1+L2) or (L1+L2+L3)
or (L1+L2+L3+L4)
(m)
(g/m)
*
or (L1+L2+L3+L4)
(m)
(m)
CMRV1426
20
30 (L1+L2)
30 (L1+L2)
15
–
CMRV1926
25
45 (L1+L2)
45 (L1+L2)
15
–
CMRV1936
25
45 (L1+L2+L3)
45 (L1+L2+L3)
15
–
CMRV2446
25
45 (L1+L2+L3+L4)
60 (L1+L2+L3+L4)
15
20
CMRV3146
30
45 (L1+L2+L3+L4)
70 (L1+L2+L3+L4)
15
20
07-370 CMRV3146EH_IU ENG 2/6/08 1:31 PM Page 5
