Wiring; Fig. 16 - Inverter Power Wiring Schematic; Fig. 17 - Inverter Wiring - York YCAL Series Installation Operation & Maintenance

FORM 150.66-NM3
ISSUE DATE: 09/25/2020

Wiring

VFD wiring is simple and requires only 3-phase power
in, 3-phase power out, and a 2-wire signal from the
transducer. No start, stop, or other alternate power re-
quirements are needed to run the VFD. Fig's 16 and 17
show the power and control wiring schematically as
well as the actual connections. The VFD controlled fan
will operate whenever the liquid line solenoid on the
respective system is energized.
7M
10M
FIG. 16 – INVERTER POWER WIRING SCHEMATIC
SYS 1
SYS 2
FIG. 17 – INVERTER WIRING
JOHNSON CONTROLS
150A L1 T1
151A L2 T2
SPEED
CONTR.
152A L3 T3
250A L1 T1
251A L2 T2
SPEED
CONTR.
252A L3 T3
TB3
TB1 TB1 TB1
TB3 TB3
BLK BLK 152A 152A
WHT WHT
(J7)
TO MICROBOARD (P4) TO MICROBOARD (P4)
TO PANEL 7 M TO PANEL 7 M
TB3
TB1 TB1
TB3
BLK BLK 252A 252A
WHT WHT
(J9)
TO MICROBOARD (P7) TO MICROBOARD (P7) TO PANEL 10 M TO PANEL 10 M
On chillers with the low ambient op-
tion, wire 127 is removed from TB7­9
and connected to to TB7­3. Wire 227 is
removed from TB10­9 and connected
to TB10­3.
150
151
152
250
251
CONDENSER
252
151A 151A
150A 150A 150 150
TO FAN #1 (EXIS TING HARNESS) TO FAN #1 (EXIS TING HARNESS)
251A 251A
250A 250A 250 250
TO FAN #2 (EXIS TING HARNESS) TO FAN #2 (EXIS TING HARNESS)
NOTE: Fans must run in the forward direction (AIR ↑)
SECTION 8 - UNIT OPERATION
CONDENSER
FAN NO. 1
FAN NO. 2
LD11301
TB2 TB2 TB2
151 151 152 152
TB2 TB2
251
251 252 252
8
LD11302
139