Installation 
 
4.17 Wiring of the Thermostat 
Installation of the thermostat is very similar to that of the remote air temperature sensor. 
 
How to Wire Thermostat   
(1)  Uncover the front cover of indoor unit and open the control box ; 
(2)  Identify  the  power  specification  of  the  thermostat,it  is  230V,  find  terminal  block  XT4  as 
NO.23~26; 
(3)  If it is the heating/cooling thermostat, please connect wire as per the figure above. 
CAUTION! 
① 
220V power supply can be provided to the thermostat by the Versati III heat pump. 
② 
Setting temperature by the  thermostat(heating or cooling) should be  within the temperature 
range of the product ; 
③ 
For other constrains, please refer to previous pages about the remote air temperature sensor; 
④ 
Do  not connect  external electric loads. Wire  220V AC  should be  used only  for  the  electric 
thermostat; 
⑤ 
Never  connect  external  electric  loads  such as  valves,  fan  coil  units,  etc.  If  connected,  the 
mainboard of the unit can be seriously damaged; 
⑥ 
Installation of the thermostat is very similar to that of the remote air temperature sensor. 
4.18 Wiring of the Control 
 
Notes: 
① 
The  wired  controller  can  be  connected  to  the  terminal  of  AP1  CN4  with  the  four-wire 
communication cable.