38
Single Zone Mega, Standard Efficiency
, and Mega 1
15V W
all Mounted Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
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REFRIGERANT PIPING CONNECTIONS
Pipe Size
(in. O.D.)
Outside
Diameter (mm)
Torque
(ft-lbs.)
1/4
6.35
13.0 - 18.0
3/8
9.52
24.6 - 30.4
1/2
12.7
39.8 - 47.7
5/8
15.88
45.4 - 59.3
3/4
19.05
71.5 - 87.5
Table 19: Torque Wrench Tightening.
Outdoor Unit Connections
1. Remove the piping cover or piping / control box cover (configuration depends on outdoor unit model) from the unit by loosening the fas-
tening screws.
2. Align the center of the refrigerant piping and corresponding connection as shown.
3. Refer to the figures below for liquid and gas (vapor) piping attachments onto the outdoor unit.
4. Place a couple of drops of PVE refrigerant oil on outside of the flare before assembling.
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 the table below. See figures for
correct connection points.
LSU180, 240HEV2
Terminal Block
Piping / Control
Box Cover
LSU090, 120HEV2
Piping Connection
Cover
Outdoor Unit
Control Box
Cover
Terminal Block
Outdoor Unit
Torque Wrench
Liquid Side Piping
(Smaller Diameter)
Vapor Side Piping
(Larger Diameter)
Figure 40: LSU090-120HEV2,
LSU090-120HFV3, LSU090-120HXV2 Piping /
Control Box Cover Removal (Appearances Will
Differ Depending on Model).
Figure 41: LSU180-240HEV2,
LSU180-240HFV3 Piping / Control Box Cover
Removal.
Figure 42: Outdoor Unit Piping Connection
(Appearances Will Differ Depending on Model).
Figure 43: Pipe Attachment.
Outdoor Unit Connections
