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Refrigerant Piping Connections
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REFRIGERANT PIPING CONNECTIONS
Outdoor Unit Connections
Single Zone High Efficiency Wall Mount Outdoor Unit Connections
1. Remove the tubing cover by loosening the fastening screws.
See Figure 36.
2. Align the center of the refrigerant pipe and corresponding
connection as shown in Figure 37.
3. Refer to Figure 38 for correct liquid and gas pipe attachment onto
outdoor unit.
4.
Place a couple of drops of refrigerant oil on the opening rim of
the flare before assembling. Ensure you do not add any contami-
nants. Tighten the flare nut initially by hand.
5. Finish tightening the flare nut with a torque wrench until the
wrench clicks. Follow torque guidelines in Table 15. See Figure
38 for correct connection points.
Figure 36:
Outdoor Unit Connection Cover Removal (HSV4)
Tubing Cover
Bracket for
Main Power Cables
When tightening the flare nut with a torque wrench, ensure the direc
-
tion for tightening follows the arrow on the wrench.
Table 15: Torque Wrench Tightening
Outside Diameter (inches)
Torque (lbs-ft)
1/4
13-18
3/8
24.6-30.4
1/2
39.8-47.7
5/8
45.6-59.3
Do not thread liquid or gas piping through bracket used to hold main
power cables.
Figure 37:
Pipe Attachment
Figure 38:
Outdoor Unit Piping Connection (HSV4)
Outdoor Unit
Gas Piping
(Larger diameter)
Liquid Piping
(Smaller diameter)
Torque Wrench
Bracket for
Main Power
Cables
