REFRIGERANT DESIGN | 51
Refrigerant Piping Design & Layout Best Practices
Due to our policy of continuous product innovation, some specications may change without notication.
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INSTALLATION & LAYOUT BEST PRACTICES
Refrigerant Piping System Layout
Figure 20: Outdoor Unit Connection Cover Removal
Table 26: Torque Wrench Tightening
Figure 21: Pipe Attachment Figure 22: Heat Pump Outdoor Unit Piping Connection
Outdoor Unit
Gas Side Piping
(larger diameter)
Liquid Side Piping
(smaller diameter)
Torque Wrench
Single Zone Extended Piping Out-
door Unit Connections
1. Remove the tubing cover from the unit by loosening the fastening
screws.
2. Align the center of the refrigerant pipe and corresponding con-
nection.
3. Place a couple of drops of refrigerant oil on the opening rim of
the flare before assembling. Do not add any contaminants.
Tighten the flare nut initially by hand.
4. Finish tightening the flare nut with a torque wrench until the
wrench clicks.
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
3/4 71.6-87.5
When tightening the are nut with a torque wrench, ensure the direction
for tightening follows the arrow on the wrench.
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