Air Handlers
18
①. Before working, please check whether the indoor unit and thermostat are
powered on.
②. Match the terminal numbers and wire colors with the colors indicated in the
indoor unit.
③. Wrong wire connection may burn the electrical components.
④
Connect the wires firmly to the wiring box. Incomplete installation may lead to
fire hazard.
⑤
Please use wire clamps to secure the external covers of connecting wires.
(Insulators must be clamped securely; otherwise, electric leakage may occur.)
⑥
Ground wire should be connected.
Wires of indoor unit
（
Only for air handler without electric heater
）
NOTE: For cooling only unit , there is no need to connect the B and D terminals.
①
High and low voltage wires should be led through different rubber rings of the
electric box cover.
②
Do not bundle up the thermostat wires or lay them side by side, otherwise
errors will occur.
③
High and low voltage wires should be secured separately. Secure the former
ones with big clamps and the latter ones with small clamps.
④
Use screws to tighten up the thermostat wires and power cords of unit on the
terminal board. Wrong connection may lead to fire hazard.
⑤
If the thermostat wires of unit and power cords are not correctly connected, the
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