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(2) All communication wires of Ultra Heat GMV are connected by screws.
Connection Screw
(3) If a single communication wire is not long enough and needs to be connected, the connected joint
must be welded or pressure-welded. Do not simply twist the wires together.
4.7.4 Communication address
Auto addressing technology is adopted for Ultra Heat GMV IDU and ODU. No need to set address
codes manually. Only the addresses of ODU and central control are needed to be set (address of central
control is only needed when there are multiple refrigeration systems).
NOTICE! When installing centralized controller or remote monitor, indoor units' project codes
must be displaced. Otherwise, collision malfunction of the project codes will show. For detail
operation methods, please refer to the Ultra Heat GMV Technical Service Manual.
4.8 Connection Method and Steps for System Communication
Ultra Heat GMV Multi VRF_Heat Recovery Serial
Fig.40
Terminal Bend
Fig.41
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