Insulating The Gas Tubes; Preparing The Flare And Connecting The Tubes Between Units - Electra DNC series Service Manual

INSTALLATION MANUAL
7.4

Insulating the gas tubes

A. Insulate each tube separately, using 6 mm thick insulation for the 3/8"-5/8" diameter
tubes, and 9 mm thick insulation for the 3/4" tubes.
B. Wrap the refrigerant tubes and wiring cables with a white PVC tape (ultraviolet
protected). Alternatively, the entire tubes assembly can be pass through a duct.
C. After testing the operation of the air-conditioning system, and making sure there is no
leakage from the connectors, insulate the connectors.
7.5

Preparing the flare and connecting the tubes between units

A. Cut the tube on which the flare must be performed with a tube cutter; make sure that the
cut is perpendicular to the tube axis and is clean off debris (see Fig. 23).
Note:
Before processing tube endings by means of the flaring tool, slide the flaring nuts; use only flaring
nuts supplied with the unit. In order to facilitate the connection it is advisable to use several drops
of cooling oil.
B. Set the tube within the flaring tool (see Fig. 24). The height "A" of the tube protrusion will
be determined by the tube outer diameter. See table No. 2.
C. Flare the cones on the tube endings that are connected to the indoor and outdoor units.
1. Copper tube
2. Flaring tool
Fig. 23. Cutting the tube
Fig. 24. Setting the tube in the flaring tool
English 20
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