Engineering Manual

MULTI
F
MAX
MULTI
F
Power Wiring / Communications Cable Guidelines
,QVWDOODWLRQDQG%HVW/D\RXW3UDFWLFHV
DUCT (HIGH STATIC) INDOOR UNITS
Connecting the Power Wiring and Communications Cable
 To access the terminal block, first unscrew the cover from the control box.
 ,QVHUWWKHSRZHUZLULQJFRPPXQLFDWLRQVFDEOHIURPWKHRXWGRRUXQLWRUEUDQFK
distribution unit (Multi F MAX systems only) through the sides of the indoor unit
and control box. Pass the wiring through the designated access holes to prevent
damage. To prevent electromagnetic interference and product malfunction, leave
a space between the power wiring and communications cable outside of the
indoor unit.
 Connect each wire to its appropriate terminal on the indoor unit control board.
Verify that the color and terminal numbers from the outdoor unit or branch
distribution unit (Multi F MAX systems only) wiring match the color and terminal
numbers on the indoor unit.
 6HFXUHWKHSRZHUZLULQJFRPPXQLFDWLRQVFDEOHZLWKWKHFDEOH
restraint.
5. Screw the steel clamp to the inside of the control panel.
• 3ODFHWKHZLULQJFDEOHVLQWKHFODPSDQGWLJKWHQWKHSODVWLF
clamp to an open surface of the control panel.
• :KHQFODPSLQJGRQRWDSSO\IRUFHWRWKHZLULQJFRQQHFWLRQV
• Neatly arrange the wiring, do not catch the wiring in the electric
box cover, and ensure the cover firmly closes.
 Fill in any gaps around the wiring access holes with sealant to
prevent foreign particles from entering the indoor unit.
)LJXUH$FFHVVLQJWKH,QGRRU8QLW7HUPLQDO%ORFN
A
Control Box
Terminal Block
Control Box Cover
Indoor Unit Terminal Block
1(L1 ) 2 (L2)
GND
3
Outdoor Unit Terminal Block or
Branch Distribution Unit Terminal Block
(Multi F MAX Systems Only)
GND
GRN /
YLW
BR
BL
RD
3 or S
)LJXUH,QGRRU8QLWWR2XWGRRU8QLW%UDQFK'LVWULEXWLRQ8QLW0XOWL
)0$;V\VWHPVRQO\3RZHU:LULQJ&RPPXQLFDWLRQV&DEOH
Connections.
• Follow manufacturer’s circuit diagrams in the technical manuals.
• Confirm power source specifications.
• Confirm that the electrical capacity is sufficient.
• 6WDUWLQJFXUUHQWPXVWEHPDLQWDLQHGSHUFHQWRIWKHUDWHGFXUUHQWPDUNHGRQWKHRXWGRRUXQLWQDPHSODWH
• Confirm cable thickness specifications.
• It is recommended that a circuit breaker is installed, especially if conditions could become wet or moist.
• ,QFOXGHDGLVFRQQHFWLQWKHSRZHUZLULQJV\VWHPDGGDQDLUJDSFRQWDFWVHSDUDWLRQRIDWOHDVWLQFKLQHDFKDFWLYHSKDVHFRQGXFWRU
• /RRVHZLULQJPD\FDXVHXQLWWRPDOIXQFWLRQRYHUKHDWDQGFDWFKILUHUHVXOWLQJLQVHYHUHLQMXU\RUGHDWK
Note:
• Terminal screws may become loose during transport. Properly tighten the terminal connections during installation.
A voltage drop may cause the following problems:
• Magnetic switch vibration, fuse breaks, or disturbance to the normal function of an overload protection device.
• Compressor will not receive the proper starting current.
'XHWRRXUSROLF\RIFRQWLQXRXVSURGXFWLQQRYDWLRQVRPHVSHFL¿FDWLRQVPD\FKDQJHZLWKRXWQRWL¿FDWLRQ
©/*(OHFWURQLFV86$,QF(QJOHZRRG&OLIIV1-$OOULJKWVUHVHUYHG³/*´LVDUHJLVWHUHGWUDGHPDUNRI/*&RUS
116 | DUCT (HIGH STATIC)
Multi F and Multi F MAX Indoor Unit Engineering Manual