Blue-White C-600P CHEM-FEED Diaphragm Pump - Manual (Page 9)

5.0 How To Operate The Pump
5.1 Adjusting the Pump Output- The flow rate can be adjusted within a range
of approximately 10%-100% of maximum output (27:1 turndown ratio) by means
of a mechanical, cam type mechanism. The mechanism adjusts the pump’s
stroke length to 1 of 27 settings within the flow range. The pump’s output is
affected by the pressure of the system , the amount of suction lift, and the
viscosity of the fluid being injected into 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 output:
1. Make sure the pump is off before adjusting.
2. Loosen the wing nut.
3. Turn adjusting knob so the pointer is on the desired setting. Note: pump less
chemical at first, then re-adjust.
4. While holding the knob, tighten the wing nut to keep the knob at the desired
setting. Note: wing nut must be tight.
Priming The Pump
Each pump is factory tested with water. The test water is sealed in the pump
head keeping the valves dry to aid in priming. If the valves have dried or priming
is difficult due to back pressure, do the following:
1. Remove the opaque discharge tubing from the top valve fitting in the
pumphead.
2. Remove the top and bottom valve fittings and immerse in water to wet the
valves. Reinstall the fittings.
3. With the discharge tubing removed, start the pump. Stop the pump when the
fluid enters the pumphead.
4. Attach the discharge tubing to the top valve fitting.
5. Be sure the footvalve/strainer is attached to the suction tubing and is installed
in a vertical position.
If your installation is at high altitude, priming may be more difficult since the
atmospheric pressure is decreased. When the suction line is dry, the diaphragm
may not create enough pull. If this is the case, do the following:
1. Remove the clear suction tube from the bottom valve fitting and fill completely
with water.
2. While the pump is running, attach the tube (filled with water) to the bottom
valve fitting.
3. When the fluid enters the pumphead, place the foot valve in the solution tank.
4. Be sure the footvalve/strainer is attached to the suction tubing and is installed
in a vertical position.
6 6
0 1
2
3
4
5 Adjustment Knob
Wing Nut
FIG. 5.1 Adjustment Cam
C-600 Page 9