Fujitsu ABU24RULX Manuale - Pagina 40
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MULTI ZONE MINI-SPLITS
Wiring
Outdoor Unit
40 amp
disconnect
Ground
High Voltage Com-
munication
3 Wire + Ground
UTY-DMMUM
Central Remote
Control
18 - 20 AWG
Power and
Communication
3 Wire + Ground
*Alternate Branch Box Power Configurations (Not Shown):
Each Branch Box may be powered from a separate 15A dedicated HVACR breaker or from a single 15A
dedicated HVACR breaker using a daisy chain to connect to secondary branch boxes.
Branch Box Terminal Connections
Miswiring Detection
Errors Detected For...
Miswired terminals
Incorrect indoor unit
Less than 2 or more than
8 indoor units
Less than 39,000 or more
than 62,000 BTUs
40
40 amp
HVACR
Breaker
Branch Box
UTP-PU03A
High Voltage Communication
from Condenser
Out to Secondary
Branch Box
Out to Secondary
Branch Box
Central Remote
In From Primary
Branch Box
Central Remote
208-230
Power Supply
15 amp
Main Breaker
HVACR
Breaker
Ground
Junction Box
Branch Box
UTP-PU03B
Optional Disconnect Switch
(or where code requires)
Primary Branch Box
Secondary Branch Box
48,000 BTUs
Power Supply
2 Wire + Ground*
Branch Box
UTP-PU03B
= 3PST
= 2PST
Power
Supply
Out to
Indoor #1
Out to
Indoor #2
Out to
Indoor #3
Power
Supply
Out to
Indoor #1
Out to
Indoor #2
Out to
Indoor #3