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 | 51
Refrigerant Piping Design & Layout Best Practices
inStallation & layout bESt PraCtiCES
Single Zone art Cool Mirror outdoor unit Connections
Piping Connection
1. Remove the tubing cover from the unit by loosening the fastening
screws (Figure 26).
2. Align the center of the refrigerant pipe and corresponding connection
as shown in Figure 27.
3. Place a couple of drops of refrigerant oil on the opening rim of the
flare before assembling. Take care not to add any contaminants.
Tighten the flare nut initially by hand.
4. Finish tightening the flare nut with a torque wrench until the wrench
clicks (Figure 28). Follow the guidelines as outlined in Table 16 for
the amount of torque to use.
Tubing cover
Figure 26:outdoor Unit Connection Cover Removal
Figure 27:Pipe Attachment
When tightening the flare nut with torque wrench, ensure
the direction for tightening follows the arrow on the 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 16:Torque Wrench Tightening
Figure 28:Heat Pump outdoor Unit Piping Connection
Outdoor unit
Gas side piping
(Bigger diameter )
Liquid side piping
(Smaller diameter )
Torque wrench
