7
Refrigerant Pipe Connections & Electrical Wiring Inlets
Before Installation
Select Air Handler Unit and AHU Control Kit Model
• Verify the cooling capacity, internal volume and air
flow requirements of each 3rd party indoor unit using
Table 2.
• Select the AHU Control kit model(s) by the indoor unit
capacity shown in Table 2.
•
Failure to adhere to these specifications can cause
performance degradation.
•
Throttling devices (TXV, orifice, piston and cap tube,
etc.) in the indoor unit shall be removed, additional
modifications may be needed. Only Lennox VRF
wired local controller V0STAT51P-3 is allowed with
the AHU Control Kit. Two typical application layouts
are shown in Figure 1 and Figure 2.
Designs with these kits require approval by the
Lennox VRF Applications Team prior to installation.
Liquid line connection
to outdoor unit
field-provided
swage connection
Ø 3/8 (10 mm)
Liquid line connection
to indoor unit
field-provided
swage connection
Ø 3/8 (10 mm)
Line Voltage Inlets
7/8 in. (22 mm)
Low Voltage Inlets
1-1/8 in. (29 mm)
BOTTOM VIEW
Figure 5. Refrigerant Piping Connections & Electrical Wiring Inlets
NOTE -
A maximum of (4) 12-AWG cabling can be used per 7/8” electrical inlet port. A maximum of (18) communica-
tion cables can be used per 1 1/8” electrical port.
NOTE -
High Voltage Cabling and Low Voltage Communication Cabling shall not pass/occupy the same electrical
port. All VRF/Furnace Communication cabling must be 18 Gauge shielded/stranded.
NOTE -
Suitable electrical connectors can be used to secure field wiring.
Summary of Contents for VPB036H4M
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