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Refrigerant Piping Connections
Due to our policy of continuous product innovation, some specifications may change without notification.
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REFRIGERANT PIPING CONNECTIONS
Outdoor Unit Connections
Single Zone Wall Mount Outdoor Unit Connections (HSV3, HV3, HLV)
1. Remove the tubing cover by loosening the
fastening screws. See Figures 52 and 53.
2. Align the center of the refrigerant pipe
and corresponding connection as shown
below.
3. Refer to Figure 54 (for HSV3) and Figure
55 (for HV3, HLV) 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
contaminants. 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 30. See figures
for correct connection points.
Figure 54: Outdoor Unit Piping Connection
(HSV3)
Tubing Cover
Bracket for
Main Power Cables
When tightening the Àare nut with a torque wrench, ensure the direc-
tion for tightening follows the arrow on the wrench.
Table 30: 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
Tubing
Cover
Conduit
Cover
Terminal Block
Do not thread liquid or gas piping through bracket used to hold main
power cables (for HSV3 model).
Figure 53: Outdoor Unit Connection Cover
Removal (HV3, HLV)
Figure 55: Outdoor Unit Piping Connection
(HV3, HLV)
Outdoor Unit
Gas Piping
(Larger diameter)
Liquid Piping
(Smaller diameter)
Torque Wrench
Bracket for
Main Power
Cables
Outdoor Unit
Torque wrench
Liquid Piping
(Smaller diameter)
Gas Piping
(Larger diameter)
Figure 52: Outdoor Unit Connection Cover
Removal (HSV3)
Figure 56: Pipe Attachment
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