Dry Contact & 24 Volt Adaptor
3
3 Functions Overview
Dry contact & 24 volt adaptor is applicable for Gree rooftop packaged unit,
U-Match unit. It can realize two functions:
(1) Transfer the control signal of 24VAC HVAC Thermostat (such as nest) into
the control signal of Gree rooftop packaged unit, U-Match unit to make the
third party 24VAC HVAC Thermostat can control rooftop packaged unit,
U-Match unit. The device type should be set as “24 Volt Adaptor”. As for
different type of 24VAC HVAC Thermostat
，
the output 24VAC signal is
different. Please set different interface type for 24 volt adaptor according to
the output signal type of your purchased 24VAC HVAC Thermostat.
NOTE!
①
The signal of 24VAC HVAC Thermostat is the control command for controlling
compressor, 4-way valve, indoor fan and other loads (set “00” for P01).And
the type of 4-way valve (P02) also needs to be set. Refer to “parameter
setting” for details.
②
The signal of 24VAC HVAC Thermostat is the control command for setting
cooling, heating, fan and other operation modes (set “01” for P01).
(2) The detection function of fire alarm signal and other dry contact’s signal is
used for detecting the signals, such as fire alarm and overflow protection of
external water tray, for control the shutdown of air conditioner. The device
