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62 | REFRIGERANT DESIGN
Single Zone Mega W
all Mounted Engineering Manual
Refrigerant Piping System Layout
INSTALLATION & LAYOUT BEST PRACTICES
Table 18: Torque Wrench Tightening
Figure 38: LSU90-120HEV1, LSU90-120HXV
Outdoor Unit Connection Cover Removal.
Figure 39: LSU180HEV1 Outdoor Unit Con-
nection Cover Removal.
Conduit cover
Piping connection
Tubing cover
Terminal Block
1(L1) 2(L2)
1(L1) 2(L2)
3
Power
connecting
cable
Power
cord
Cord clamp
90-120HEV1
1(L) 2(N)
L
N
3
90-120HXV
Single Zone Mega Outdoor 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 connection as shown, and tighten the flare nut initially by hand.
3. Finish tightening the flare nut with a torque wrench until the wrench clicks. Follow the guidelines as outlined in Table 18 for the amount of
torque to use.
When tightening the flare nut with
torque wrench, ensure the direc-
tion for tightening follows the ar-
row on the wrench.
Tubing cover
Figure 40: LSU240HEV1 Outdoor Unit
Connection Cover Removal.
Tubing
Cover
Terminal
Block Cover
Terminal Block
Figure 41: Pipe Attachment.
Outdoor unit
Gas side piping
(Bigger diameter)
Liquid side piping
(Smaller diameter )
Torque wrench
Figure 42: LSU90-120HEV1, LSU90-120HXV
Outdoor Unit Piping Connection.
Figure 43: LSU180HEV1 Outdoor Unit
Piping Connection.
Torque wrench
Liquid side piping
(Smaller diameter)
Gas side piping
(Bigger diameter)
Outdoor unit
Liquid side piping
(Smaller diameter)
Torque wrench
Gas side piping
(Bigger diameter)
Outdoor unit
Figure 44: LSU240HEV1 Outdoor Unit Pip-
ing Connection.
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