York YK - Page 7

FORM 160.52-M2
YORK INTERNATIONAL
7
FIG. 2- PULSE WIDTH MODULATION (PWM) SPEED CONTROL SIGNAL
OIL PUMP VARIABLE SPEED DRIVE
LD04377
+12 VDC
0VDC
"OFF TIME"
"ON TIME"
OFF
ON
+12 VDC
0 VDC
+12 VDC
0 VDC
OFF
ON
OFF
ON
OFF
ON
OFF
ON
0.7 SEC
0.52 SEC
0.35 SEC
0.17 SEC
25.0 Hz
33.5 Hz
42.5 Hz
51.0 Hz
60.0 Hz
OUTPUT FREQUENCY IN HZ = (ON TIME IN SECONDS / 0.02) + 25
SMALLEST INCREMENT OF CHANGE = 0.010 SEC; 0.5 Hz