FORM 195.26-NM3
YORK INTERNATIONAL
59
BY A CYCLING DEVICE OR TIME CLOCK
Remote START/STOP is accomplished by connecting a
time clock or other “dry” contact in series with the flow
switch on terminals 13 & 14 (Sys 1) and 13 & 15 (Sys 2).
See Fig. 12 for the location of the terminals. The contact
must be closed to allow the chiller to run. Any time the
contact opens,
the chiller will shut down and the following status mes-
sage will be displayed.
Wiring from these contacts should not exceed 25 ft. and
should be run in grounded conduit that does not carry
any wiring other than control wiring. Additionally, if an
inductive device (relay, contactor) is supplying these
contacts, the coil of the device must be suppressed with
a user supplied YORK P/N 031-00808 suppressor.
FAN CONTROL STRATEGY
ABOVE 25°F AMBIENT
The chiller is equipped with 2 condenser fans. The stan-
dard fan control strategy is fan cycling by outdoor ambi-
ent temperature, with the low ambient cut-out (chiller shut
down) set at 25°F.
Above 25°F ambient, 1 fan will turn on 4 seconds after
the compressor starts. This fan will continue to run until
the compressor shuts down. This fan is designated as
Fan 2 (6M).
If the ambient temperature is above 45°F, one more fan
will start after either compressor has run for 30 seconds.
This fan will continue to run until the compressors shut
down or until the ambient temperature drops to 40°F. This
fan is designated as Fan 1 (5M).
Locations of the fans and a chart showing the operation
outlined above is shown in Fig. 25.
For operation below 25°F, a Low Ambient Kit MUST be
installed. See page 65.
S Y S # 1
N O R U N P E R M
S Y S # 2
N O R U N P E R M
FIG. 25 – FAN LOCATIONS
LD00578(R)
FAN
AMBIENT
AMBIENT
ON
ON
2
25°F
24°F
1
45°F
40°F
