York YCIV Series, Installation Operation & Maintenance

Page: 196 / 326

JOHNSON CONTROLS
196
FORM 201.23-NM2
ISSUE DATE: 09/25/2020
SECTION 6 - TECHNICAL DATA
VSD LOGIC TO CHILLER MICROPROCESSOR
BOARD RS-485 COMMUNICATION
CONFIGURATION JUMPERS
The Chiller Control Board and the VSD Logic
Boards communicate over an RS-485 link. The
communications link requires a matching address
to be set up at both ends. The VSD Logic Board
communications bus is configured through the use of
jumpers, factory plugged into the J5 plug on the VSD
Logic Board. The VSD Logic Board will only check
the jumper positions once at power-up.
Table 4 on page 196 shows the VSD Logic Board Address
configuration and the associated location of the jump-
ers. The jumpers will vary according to the number of
VSD Logic Boards installed. All chillers utilize a sin-
gle VSD Logic Board and will use VSD Logic Board
Address 1.
TABLE 4 - VSD LOGIC BOARD ADDRESS JUMPER
VSD LOGIC BOARD'S
ADDRESS
VSD LOGIC BOARD
JUMPER POSITION
1
J5-1 to J5-2
and
J5-3 to J5-4
2 J5-3 to J5-4
3 J5-1 to J5-2
4 NONE
MAXIMUM VSD FREQUENCY/MODEL
DESIGNATOR
The model number of the chiller determines the maxi-
mum VSD frequency at 100% full speed. The maxi-
mum frequency is programmed by factory installed
jumpers on the J7 plug of the Chiller Control Board.
Three digital inputs determine a binary code, which de-
termines the maximum frequency. The inputs are read
as a 0 or low when a jumper is out or a 1 or high when
the wire jumper is inserted between the two pins. The
jumpers will only be checked once by the Chiller Con-
trol Board on power-up.
Table 5 on page 196 shows the Chiller configuration
and the associated location of the jumpers.
TABLE 5 - MAXIMUM FREQUENCY / MODEL
DESIGNATOR JUMPER
CHILLER
CONTROL
BOARD
MAX. VSD
FREQUENCY
J7-1
TO
J7-2
J7-3
TO
J7-4
J7-5
TO
J7-6
YCIV
200 Hz 1 1 0
0157 SA/PA,
0177 EA/VA,
0187 SA/PA,
0227 SA/PA,
0227 EA/VA,
0247 SA/PA,
0247 EA/VA,
0267 SA/PA,
0357 SA/PA,
0397 SA/PA
196 Hz 1 1 1
192 Hz 0 1 0
0187 EA/VA,
0207 EA/VA,
0327 EA/VA,
0357 EA/VA
188 Hz 0 1 1 0307 SA/PA
186 Hz 1 0 0
0207 SA/PA,
0157 EA/VA,
0287 SA/PA
182 Hz 0 0 0
0177 SA/PA,
0197 EA/VA,
0267 EA/VA
178Hz 1 0 1 0287 EA/VA
178 Hz
(Spare)
0 0 1