Due to our policy of continuous product innovation, some specifications may change without notification.
Due to our policy of continuous product innovation, some specifications may change without notification.
reFrIGerAnT deSIGn | 41
Refrigerant Piping Design & Layout Best Practices
Piping Connection
Single Zone art Cool premier Connections
Pipe connection for a Single Zone System
1. Remove the connection cover from the unit by loosening
the fastening screw (Figure 21).
2. Align the center of the refrigerant pipe and correspond-
ing connection as shown in Figure 22 and tighten the
flare nut by hand.
3. Tighten the flare nut with a torque wrench until the
wrench clicks. Follow the guidelines as outline in Table
14 for the amount of torque to use.
When tightening the flare nut with torque wrench, ensure
the direction for tightening follows the arrow on the wrench.
Figure 21: Heat Pump outdoor Unit Removal of Connection Cover
Figure 22: Heat Pump outdoor Unit Piping Connection
inStallation & layout bESt praCtiCES
Connection cover
Outdoor unit
Gas side piping
(Bigger diameter)
Liquid side piping
(Smaller diameter)
Torque wrench
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
Table 14: Torque Wrench Tightening
