Multi F Ceiling Cassette Installation Manual

34
Multi F Ceiling Cassette Indoor Unit
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MA
X
MUL
TI
F
MUL
TI
F
Connection sockets (included as a factory-supplied accessory with the in-
door units) may need to be used when piping the indoor units to the outdoor
unit.
Indoor Unit
Capacity
Vapor (in., OD) Liquid (in., OD)
A B A B
18,000 Btu/h Ø3/8 → Ø1/2 N/A
A
B
Flare
to
Indoor
Unit
Flare
to
Outdoor
Unit
1. Align the center of the piping sections and tighten the flare nut by
hand.
2. Tighten the flare nut with a torque wrench, using the arrows on
the wrench as a guide, until a click is heard.
Figure 42: Connection Socket Diagram.
Using the Connection Socket
Connection Socket
(Factory-supplied with
the indoor unit)
Figure 43: Performing Connections.
Table 27: Connection Socket Dimensions.
IDU to ODU
PIPING CONNECTIONS
Multi F MAX Outdoor Unit System Piping Connections
Branch Distribution to Indoor Unit Piping Connections
• Install indoor unit liquid and vapor refrigerant pipes (and connection wiring) to the appropriate branch distribution ports.
• Clearly note on the indoor unit’s refrigerant piping (liquid, vapor) which branch distribution port it is connected to (A, B, C, D).
Outdoor Unit Piping Connections
LMU480HV, LMU540HV,
and LMU600HV
Liquid Line Connection (in., OD) x Qty. 3/8 x 1
Vapor Line Connection (in., OD) x Qty. 3/4 x 1
Avoid Pipe Damage
• When routing field-provided piping, avoid damaging the outdoor unit from excessive vibration.
• Properly insulate the liquid and gas lines separately up to the point of connection at the unit frame.
• See table below for Multi F MAX outdoor unit connection types.
Table 28: Outdoor Unit Piping Connections.
Table 29: Branch Distribution Unit Piping Connections.
Branch Distribution
Unit
PMBD3620 PMBD3630 PMBD3640 PMBD3641
Piping Connections to Outdoor Unit
Liquid (in., OD) x Qty. Ø3/8 x 1
Vapor (in., OD) x Qty. Ø3/4 x 1
Piping Connections to Indoor Units
Liquid (in., OD) x Qty. Ø1/4 x 2 Ø1/4 x 3 Ø1/4 x 4 Ø1/4 x 3, Ø3/8 x 1
Vapor (in., OD) x Qty. Ø3/8 x 2 Ø3/8 x 3 Ø3/8 x 4 Ø3/8 x 3, Ø5/8 x 1
Figure 44: Branch Distribution Ports to Indoor Units.
ABC D
Correctly route the piping so it does not make contact with
mounting bolts. Allow room for eld installation.
Multi F Outdoor Unit to Indoor Unit Piping Connections, continued.
Note: