165
JOHNSON CONTROLS
FORM 201.21-NM4 (616)
165
JOHNSON CONTROLS
6
CHILLER CONFIGURATION JUMPERS (CON'T)
MAXIMUM VSD FREQUENCY/
MODEL DESIGNATOR
The model number of the chiller determines the maxi-
mum VSD frequency at 100% full speed. The maximum
frequency is programmed by factory installed jumpers
on the J7 plug of the Chiller Control Board. Three
digital inputs determine a binary code, which determines
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 Control Board
on power-up.
TABLE 3 shows the Chiller configuration and the
associated location of the jumpers.
TABLE 3 - MAXIMUM FREQUENCY / MODEL DESIGNATOR JUMPER
3 COMPRESSOR
CHILLER CONTROL
BOARD MAX.
VSD FREQUENCY
J7-1 to J7-2 J7-3 to J7-4 J7-5 to J7-6
YCAV
200 Hz
1
1
0
1309 SA/PA, 1429 SA/PA
196 Hz
1
1
1
—
192 Hz
0
1
0
1169 EA/VA, 1309 EA/VA
188 Hz
0
1
1
1139 SA/PA,
186 Hz
1
0
0
1039 SA/PA
182 Hz
0
0
0
0969 EA/VA
178Hz
1
0
1
1039 EA/VA
178 Hz (Spare)
0
0
1
—
4 COMPRESSOR
CHILLER CONTROL
BOARD MAX.
VSD FREQUENCY
J7-1 to J7-2 J7-3 to J7-4 J7-5 to J7-6
YCAV
200 Hz
1
1
0
1739 SA/PA, 1829 SA/PA,
1909 SA/PA
196 Hz
1
1
1
1549 SA/PA
192 Hz
0
1
0
1549 EA/VA, 1649 SA/PA,
1739 EA/VA
188 Hz
0
1
1
—
186 Hz
1
0
0
—
182 Hz
0
0
0
—
178Hz
1
0
1
1429 EA/VA
178 Hz (Spare)
0
0
1
—