Installation Instructions
CoolMaster User Manual
11
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© 2008 Cool Automation
Connecting to non VRV/VRF Units
4.4
CoolMaster can be used also with split units. In this case each indoor has to be provided with a
communication interface (for example, D3 net interface for Daikin Units, M-Net interface for Mitsubishi
Electric units, etc'). All those interfaces are plugged into the PCB of the indoor unit (the cable is
provided with the interface), and their output has to be inter chained by 2 wired communication line,
similarly to the wiring connection of the indoor units in a regular VRV/VRF system. CoolMaster has to
be connected to this line, as shown in the following diagram.
When using the CoolMaster 1000D with KRP928 or DTA102/112 adaptors in Multi/Split/Sky air range
of Daikin Air Conditioning systems a change should be made also inside the CoolMaster itself. This
change should be made only if there is no VRV/Centralized Controller connected to this F1 F2
communication line1. Change will be as follows:
Step1 - Open the top cover of the unit
Step 2 - Change the position of the dip switch (all 4 pins), as shown in the following figure
Original Position (Factory supplied)
New Position
Please note, that when using CoolMatser with Daikin KRP and DTA D3 net interfaces, the fan speed control and
room temperature monitoring is not possible.
