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22 Vertical Air Handling Unit
Installation
Connect the wires to the terminals on the control board individually
according to the outdoor unit connection.
Ensure that the color of the wires of outdoor unit and the terminal
No. are the same as those of indoor unit respectively.
208/230 V 1Φ 60 Hz
Terminal Block Indoor
1(L1) 2(L2) 3
Connected to outdoor unit or BD unit
Wiring
knockouts
Control
Box Cover
Upper
Front Panel
Wiring Connection
1. Detach the upper panel & control box cover. And remove two wiring Knockouts.
GN/YL
20 mm
(25/32 inch)
n Connecting cable
n Precautions when laying power and ground wiring
The power connecting cable between the outdoor and indoor units must
comply with the following specifications: NRTL Recognized (for example, UL
or ETL recognized and CSA certified).
AWG 18 (0.75 mm
2
)-4 is the minimum recommended wire size,
however, the selected conductors must comply with local codes and be
suitable for installation in wet locations.
Use round pressure terminals for connections to the power terminal block.
When none are available, follow the instructions below.
- Do not connect wiring of different thicknesses to the power
terminal block. (Slack in the power wiring may cause abnormal
heat.)
- When connecting wiring which is the same thickness, do as
shown in the figure below.
- For wiring, use the designated power wire and connect firmly, then secure to prevent outside pressure
being exerted on the terminal block.
- Use an appropriate screwdriver for tightening the terinal screws. A screwdriver with a small head will
strip the head and make proper tighterning impossible.
- Over-tightening the terminal screws may break them.
Round pressure terminal
Power wire
(Ground wire)
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