CoolMaster - HVAC Mitsubishi Electric VRF installation guide

This article applies to the following CoolMaster products:

  • CoolMaster
  • CoolMasterPro 
  • CoolMasterNet


Please note that the article applies also to commissioning the following HVAC brands:
  • Trane


  1. HVAC Communication Terminals
    HVAC outdoor connection


    * For Heat Recovery systems the connection is at outdoor units only.

    * Polarity is not required on the HVAC communication line.

  2. Connecting to the line plug

    Secure the cables in the L1 line plug.

  3. Plugging to the CoolMaster

    Insert the plug in to the CoolMaster L1 socket.

  4. Check DIP Switches are set correctly

    Dip switches setup for VRF HVAC system on L1.






The wire to connect the CoolMasterNet to the M1-M2 (also known as the M-NET Interface) is 18AWG, twisted pair, shielded and stranded. 

Was this article helpful?
0 out of 0 found this helpful