Embedding The Tubing And Wiring - Sanyo KMS1872 Technical & Service Manual

G Install the indoor unit more than 3.3' (1 m) away from any
antenna or power lines or connecting wires used for tele-
vision, 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 operating
noise.
Table 3
Max.
Allowable
Model Tubing Length
per unit
(ft.)
CM1972/CLM1972 82
CM2472/CLM2472 82
CM3172/CLM3172 100
* If total tubing length becomes 150 to 200 ft. (Max.) or 150 to 230 ft. (Max.), charge additional refrigerant (R410A) by 0.22 oz./ft.
No additional charge of compressor oil is necessary.

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 refrig-
erant 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.
Max. Allowable Total
Tubing Length Total Tubing Length
at shipment
(L1+L2+L3) or
(L1+L2+L3+L4)
(ft.)
150 (L1+L2+L3) 150 (L1+L2+L3)
150 (L1+L2+L3+L4) 200 (L1+L2+L3+L4)
150 (L1+L2+L3+L4) 230 (L1+L2+L3+L4)
Limit of Limit of Elevation
Difference
(L1+L2+L3) or (H1, H2, H3, H4)
(L1+L2+L3+L4)
(ft.)
5
Required Amount
of Additional
Refrigerant
(ft.) (oz./ft.)
50 —
50 0.22
50 0.22
*