York HP Series Service Manual page 12

2.3.1.6 Build-in Drain Pump
 The drain pump can lift the condensing water up to 750mm upmost.
 It's convenient to install drainage piping under most space condition.
2.3.1.7Terminals For Alarm Lamp and Long-distance On-off Controller Connection Are
Standard
 Reserve terminals for the connection of alarm lamp and long-distance on-off controller, more
human control.
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