Energy Recovery Ventilation System
23
Fig.16 Wiring Board
(5) Fix the communication cable with clamp of electric box.
(6) In order to ensure the reliability of communication between IDU and
ODU and the communication among each IDU, add a matched
resistance (supplied in a package before ex-factory) on the wiring board
of the last indoor unit in a series connection. The matched resistance
should be connected in parallel between terminal screw D1 and D2, as
shown in the following figure.
Fig.17 Communication Wire Interface
NOTES!
① One energy recovery ventilation system can connect two wired
controllers that must be set as master one and slave one.
② When the indoor unit is controlled by two wired controllers, the
addresses of the two wired controllers should be different through
address setting. Address 1 is for main wired controller; Address 2 is for
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