23PKGP-SVX19A-EN
Installation - Electrical
General Recommendations
The following is about safety, please follow it strictly!
Power Supply Wiring
1. Connect the power wiring to the main terminal block (TB) of the unit’s control box.
2. CN2 is the slave connection port, which is connected hand in hand.
3. Termination resistor is not needed for the host unit. It could be installed for slave units as needed.
4. CN3 is the connection port of the centralized controller which is only connected to the host unit.
5. CN24 is the connection port for DTU (not applicable for exported CXAU).
6. The control signal for the external water pump should be connected between the active terminals 50 and 51.
7. The reserved oor heating three-way valve control signal should be connected between terminals 52 and 53.
8. The control signal of the reserved water circuit auxiliary electric heating should be connected between terminals 58 and
59.
9. The reserved waterway solenoid valve control signal should be connected between terminals 60 and 61.
10. The operating signal should be connected between passive terminals 40 and 41.
11. The fault signal should be connected between passive terminals 42 and 43.
12. Remote switch/end interlocking signal is short connected by factory default.
WARNING
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All eld-installation wiring and grounding must conform to local electrical codes.
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Wiring preparation and wiring connection should be done with reference to electrical parameters and wiring
diagram. Make sure the wirings rmly connected.
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Independent power supply should be equipped with a circuit breaker that matches the voltage of the unit, do not
share power supply with other electrical products to avoid the danger of overload.
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The wire should not contact with the sharp edge of sheet metal, screw tip, copper tube, compressor, motor or
other moving parts to avoid damage to the wire or other danger.
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The manufacturer will be free of responsibility for any problems caused by unauthorized changes to the internal
wiring of the unit.
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After the wiring is completed, it must be xed with a wire clamp to prevent the wire damage or danger caused
by falling and colliding with other components.
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When wiring the unit, be sure to separate the high voltage and low voltage wirings to avoid communication and
operation issues.
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All units should be safely grounded. Please ensure that the grounding wire is rmly connected with the
grounding terminal and grounding electrode of the unit. Improper grounding may cause electric shock.
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The unit electric control box is connected with high voltage electricity. Please disconnect power before the
installation of the electrical wiring of the unit is completed, to avoid casualties.
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Please do not touch any control components and terminal parts before cutting o the power supply of the unit
at any time, to avoid electric damage.
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Only copper wires can be used for the connection of the terminals to avoid corrosion or overheating.
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The water ow switch and the water pump should be connected by referring to the circuit diagram of the unit.
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