York DHP30NWB21SDCP30NWB21SDHP36NWB21SDCP36NWB21S Service Manual page 39

Fig.4.2 shows the installation steps of the wired controller
(1) Prior to the installation, please first cut off the power supply of the wire buried in the installation hole, that is, no operation is allowed
with electricity during the whole installation.
(2) Pull out the four-conductor communication line from the installation holes and then let it go through the rectangular hole behind the
soleplate of the wired zone controller.
(3) Stick the soleplate of the wired zone controller to the wall over the installation hole and then secure it with screws M4X25.
(4) Insert the four-conductor communication line into the slot of the wired zone controller and then buckle the front panel and the
soleplate of the wired zone controller together.
(5) Finally, secure the front panel and the soleplate of the wired zone controller tightly with screws ST2.9X6.
CAUTION!
Please pay special attention to the following during the connection to avoid malfunction of the air conditioning unit due to
electromagnetic interference.
(1) Separate the signal and communication lines of the wired zone controller from the power cord and connection lines between the
indoor and outdoor unit, with a minimum interval of 8in (20cm), otherwise the communication of the unit will probably work abnormally.
(2) If the air conditioning unit is installed where vulnerable to electromagnetic interference, then the signal and communication lines
of the wired zone controller must be shielded stranded 4-conductor.
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Fig.4.2
, but there are some issues that need your attention.
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5
Fig.4.2
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Service Manual