Figure 45: External customer input control connections
Note:
• The contact resistance of external switch cannot be greater than 1kΩ. The loop voltage is
12 VDC when the external switch is open.
• SFM1 are installed and wired in the factory for two-pipe units, and SFM1 and SFM2 are
loose shipped and installed in the field for four-pipe units.
Figure 46: Alarm output and running status connections
Note:
• Alarm output on terminals 65 and 66 and running status on terminals 67 and 68 are free
contacts, and the rating capacity is 1A/115V.
• Connections of the modular communication for 0070, 0105, and 0140 models are
completed in the factory. Modular communication connections for other multi-module
applications are completed in the field.
YMAE Air-Cooled Inverter Scroll Chiller and Heat Pump64
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