21
7-2. Embedding the Tubing and Wiring
●
Before beginning embedding installation work, consult
fully with agencies or offices related to the building’s
foundation, construction, electricity, and water.
●
Wait to make connections to the embedded portion.
Each connection step is described later in this
manual.
●
Securely cover the end of the embedded tubing to
prevent intrusion of dirt or moisture.
●
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.
●
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.
●
Apply sufficient thermal insulation to the refrigerant
tubing and drain pipes.
φ
6.35
φ
6.35
φ
6.35
φ
6.35
φ
9.52
φ
9.52
φ
9.52
φ
9.52
φ
9.52
A
φ
9.52
B
φ
9.52
C
Outdoor unit
Indoor unit
Union
φ
9.52
Flare
φ
12.7
φ
12.7
D
(φ
12.7
→ φ
9.52) Supplied Reducer
(93 123 types)
(93 123 types)
(93 123 types)
(183 type)
(3) Connecting indoor unit type 183 at D (Length of tube: less than 17 m)
φ
6.35
φ
6.35
φ
6.35
φ
6.35
φ
9.52
φ
9.52
φ
9.52
φ
9.52
φ
12.7
A
φ
9.52
B
φ
9.52
C
Outdoor unit
Indoor unit
φ
12.7
D
(93 123 types)
(93 123 types)
(93 123 types)
(243 type)
(4) Connecting indoor unit type 243 at D
Fig. 5d
Fig. 5c
