2-2. Embedding the Tubing and Wiring
● Before beginning embedding installation work, con-
sult fully with agencies or offices related to the build-
ing’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.
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