5
56
5. Installation Walkthrough
5.7. Wiring
5.7.3. Explanation of Terminal Block 3
Application Side
E
F
COM
CS
COM
HS
E,F
: Cooling and Heating Mode Switchovers
This unit is capable of switching between heating and cooling automatically, according to the ambient
temperature, or external signal input. Please refer to the user’s manual for more detailed explanantions
on ambient temperature setting. For external signal input, the external signal should be connected to
“
Cool Mode Switch” for cooling operation, and “Heat Mode Switch” for heating operation.
A:
Signal cable between indoor and outdoor unit.
A
B,C: Motorized Water mixture valve 1&2:
As explained in System illustration chapters, this unit can have two water mixture valves for
distribution system under its control.Water Mixture Valve 1 for Heating & Cooling circuit 1
Water Mixture Valve 2 for Heating & Cooling circuit 2
TO OUTDOOR UNIT
COMMUNICATION
2*0.75mm
²
SHIELDED
Summary of Contents for Thermal Plus 12
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