Requirements For Communication Line; Select Communication Line For Indoor Unit And Wired Controller - Lennox VRF VEAH024N432P Installation & Operation Instructions

Lennox VRF Air Handler Indoor Unit
may consist of an appropriate sized power cord which connected with the grounding piece located
in the unit control box and also connecting to the building electric service panel. Other methods of
grounding are permitted if performed in accordance with the "national electric code" (nec)/
"american national standards institute" (ansi)/ "national fire protection association" (nfpa) 70 and
local/state codes. In canada, electric grouding conforms to the canadian electric code csa c22.1.
failure to observe this warning can result in electrical shock that can cause personal injury.
Special warning for installation of furnaces or air handling units in enclosed areas,
such as garages, utility rooms or parking areas.
Carbon monoxide producing devices (such as an automobile, space heater, gas water heater,
etc.) should not be operated in enclosed areas such as unventilated garages, utility rooms or
parking areas because of the danger of carbon monoxide (CO) poisoning resulting from the
exhaust emissions.If a furnace or air handler is installed in an enclosed area such as a garge,
utility room or parking area and a carbon monoxide producing device is operated therein, there
must be adequate ventilation directly to outside.
This ventilation is necessary to avoid the danger of CO poisoning which can occur if a carbon
monoxide producing device continues to operate in the enclosed area. Carbon monoxide emission
can be (re)circulated throughout the building if the furnace or air handler is operating in any mode.
CO can cause serious illness including permanent brain damage or death.

3.3 Requirements for Communication Line

Note:
If the unit is installed in the place with strong electromagnetic interference, shielded
wire must be applied on the communication wire between indoor unit and wired controller.
Twisted pair line with shielding function must be applied on the communication wire
between indoor unit and indoor unit (outdoor unit).

3.3.1 Select communication line for indoor unit and wired controller

Fig 3.3.1
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