Blue-White C-1500N CHEM-FEED Diaphragm Pump - Manual (Page 8)

5.0 How To Operate The C-1500N
5.1 Adjusting the Pump Output- Standard models (fig. 5.1) - The C-1500N
flow rate can be adjusted within a range of 5% -100% of maximum output (20:1
turndown ration) by means of a mechanical, cam type mechanism. The mecha-
nism adjusts the pump’s stroke length to an infinite number of settings within the
flow range. Because the pump’s output is reduced by increasing the pressure of
the system being injected into, the amount of suction lift, and the viscosity of the
fluid being injected, the pump must be over-sized to allow for these factors.
Sizing the pump to allow adjustment within the midrange is preferred to maintain
accuracy. Consult the factory for individual pump model output curve data.
To adjust the pump’s output:
1. With the pump running, loosen the set screw.
2. Turn the adjustment knob to the desired setting.
3. Re-tighten the set screw.
CAUTION
ADJUST WHILE RUNNING
DISCHARGE LINES MAY BE UNDER
HIGH PRESSURE. USE CARE TO
PROTECT YOURSELF WHEN
DISCONNECTING.
MAX MIN
1
2
3
4
5
6
7
8
9
LOOSEN THE LOCK SCREW
TURN KNOB TO DESIRED SETTING
RE-TIGHTEN THE LOCK SCREW
5.2 Adjusting the Pump Output - DELUXE Models (fig. 5.2)
In addition to the cam type mechanism adjustment (section 5.1), the pump output
of the C-1500N deluxe unit equipped with an optional electronic cycle timer
board can also be fine tuned by adjusting the timer adjustment knob. The total-
time cycle is factory preset and is not user adjustable. The on-time cycle is
adjustable from 5% to 100% of the total cycle time. Example: If the total-time
cycle is 5 seconds and the on-time cycle is adjusted for 20 percent, the pump will
run for 1 second and turn off for 4 seconds (5 second total cycle). This cycle is
repeated until either the cycle time is changed or the input power is disconnected
from the pump.
Note: When the input power is disconnected from the C-1500N, the unit will
maintain the last adjusted settings. When power is restored to the pump, the
C-1500N will begin to pump using the last time cycle setting.
Junction Box
Cycle Timer
Adjustment Knob
FIG. 5.2
To adjust the On-Time :
Turn the timer adjustment knob
located on the junction box
cover.
Clockwise increases the time on.
FIG. 5.1
Adjustment Knob
(Cam Type Mechanism)
C-1500N Page 8