York YCAL Series - Wiring

FORM 150.66-NM3
ISSUE DATE: 09/25/2020
139
JOHNSON CONTROLS
SECTION 8 - UNIT OPERATION
8
On chillers with the low ambient op-
tion, wire 127 is removed from TB79
and connected to to TB73. Wire 227 is
removed from TB109 and connected
to TB103.
150A L1 T1 150
151A L2 T2 151
152A L3 T3 152
CONDENSER
FAN NO. 1
SPEED
CONTR.
7M
250A L1 T1 250
251A L2 T2 251
252A L3 T3 252
CONDENSER
FAN NO. 2
SPEED
CONTR.
10M
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.
FIG. 16 – INVERTER POWER WIRING SCHEMATIC
LD11301
FIG. 17 – INVERTER WIRING
LD11302
TB3
TB1
TB2
TO PANEL 10M TO FAN #2 (EXISTING HARNES S)TO MICROBOARD (P7)
251250
252
250A
251A252A
WHT
BLK
TB3
TB1
TB2
TO PANEL 10M TO FAN #2 (EXISTING HARNES S)TO MICROBOARD (P7)
251
250
252
250A
251A252A
WHT
BLK
TB3
TB1
TB2
TO PANEL 7M TO FAN #1 (EXISTING HARNESS)
TO MICROBOARD (P4)
151
150
152
150A
151A
152A
WHT
BLK
TB3
TB1
TB2
TB3
TB1
TB2
TO PANEL 7M TO FAN #1 (EXISTING HARNESS)
TO MICROBOARD (P4)
151
150
152
150A
151A
152A
WHT
BLK
SYS 1
SYS 2
NOTE: Fans must run in the forward direction (AIR ↑)
(J7)
(J9)