Dry Contact & 24 Volt Adaptor
22
Fig. 5.5 One adaptor controls one indoor unit
NOTE!
RS485 communication interface of dry contact & 24 volt adaptor is the
non-polar interface. It’s no need to consider the polar of RS485 interface for wiring.
5.3.2 Connection of Adaptor and Thermostat
The connection between dry contact & 24 volt adaptor and the third party 24VAC
HVAC thermostat is shown as below:
(1) When the output signal of thermostat is the control command of load, such