1. Electrical work
SYSTEM DESIGN
204
S.D. WR2
MEE15K036
I.
1. Electrical work
1-1. General cautions
OK
NO
Follow ordinance of your governmental organization for technical standard related to electrical equipment, wiring
regulations, and guidance of each electric power company.
Wiring for control (hereinafter referred to as transmission cable) shall be (50mm[1-5/8in.] or more) apart from power source
wiring so that it is not influenced by electric noise from power source wiring. (Do not insert transmission cable and power
source wire in the same conduit.)
Be sure to provide designated grounding work to Heat source unit.
Give some allowance to wiring for electrical part box of indoor and Heat source unit, because the box is
sometimes removed at the time of service work.
Never connect 380~415V(220~240V) power source to terminal block of transmission cable. If connected,electrical parts
will be damaged.
When extending the transmission line, make sure to extend the shield cable as well.
Use 2-core shield cable for transmission cable. If transmission cables of different systems are wired with the same
multiple-core cable, the resultant poor transmitting and receiving will cause erroneous operations.
Heat source
unit
Indoor unit
Remote
BC controller
controller
2-core shield cable
2-core shield cable
Remote
controller
Indoor unit
Multiple-
core cable
BC controller
Heat source
unit
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