Nordson_EFD_781RC_Operating_Manual.pdf - 第10页
9. Once 781RC system is fully primed, set pump speed control to approximately 9 o’clock — . 10. Using the button on the ValveMate controller, place the controller in the mode. In mode, channels and can be selected in…
Initial 781RC Installation / Setup Procedures
Prior to installing this system, please read the associated spray valve
and valve controller operating instructions to become familiar with the
operation of all components of the spray system. Select an appropriate
system setup location for all system components — pump enclosure
assembly, 1-liter reservoir, ValveMate 8040, and 781RC* Spray Valve.
*The 781RC system is also available with a 787MS-SS-RC MicroSpray
™
valve. Setup is exactly the same regardless of the valve type.
Important Note: Turn pump enclosure power switch to OFF and
ensure speed control is turned fully counterclockwise to OFF
position.
1. Cut feed tube hose to desired length and install into tank lid outlet
port. Insert tube to bottom of tank liner. Cut tube at slight angle to
avoid fluid blockage at bottom of tank.
2. Connect the fluid supply line from tank outlet to pump inlet
compression fitting.
3. Connect the fluid line from pump outlet to the 781RC inlet port
compression fitting.
4. Cut recirculation feed hose to desired length and install into tank lid
recirculation port. Insert recirculation hose to bottom of 1-liter liner.
Cut tube at slight angle to avoid fluid blockage at bottom of tank.
Attach other end to 781RC recirculation port outlet compression
fitting.
5. Connect the control air hose and the nozzle air hose to
corresponding outputs on solenoid block. Reference ValveMate
8040 Quick Start Guide.
6. Fill reservoir by pouring fluid directly into tank liner or
manufacturer’s bottle placed inside reservoir. Secure cover.
a. Confirm the speed control knob is OFF by turning fully
counterclockwise.
b. Set ValveMate 8040 to mode.
c. Turn pump enclosure power switch to ON.
7. Turn 781RC valve stroke to no less than 1/2 turn or more open.
Priming the pump. (Important Note: Dry running time should be
kept to an absolute minimum.)
8. During initial startup / priming, keep pump speed LOW
(approximately 9 o’clock position) until fluid reaches the pump and
begins to recirculate to the 781RC Spray Valve. Increase pump
speed after initial prime to accelerate recirculation.
NOTE: Make changes to pump speed slowly to avoid surge loads
on external power supply.
Setup steps 9, 10, 11, and 12 continued on next page.
781RC MicroMark Recirculating Spray Marking System
9www.nordsonefd.com info@nordsonefd.com +1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide.
9. Once 781RC system is fully primed, set pump speed control to
approximately 9 o’clock — .
10. Using the button on the ValveMate controller, place the
controller in the mode.
In mode, channels and can be selected independently
without nozzle air pressure.
11. While in mode, depress button and adjust speed control to
set fluid flow rate to one or two drops per second.
NOTE: Flow adjustments should be made with speed control as
opposed to reductions of valve needle stroke. Tight valve stroke
settings will cause blockage / clogging of valve outlet.
12. Set the nozzle air pressure on the nozzle to 0.3 bar (5 psi) and
actuate the controller. Adjust higher as needed to create even
spray. The valve will produce a fine spray.
To change fluid flow, use the needle stroke control knob and / or
pump speed control. Maintain balanced settings. Do not set stroke
too tightly as this will cause nozzle clogging.
To change nozzle air, use the nozzle air pressure regulator. Higher
pressures will provide finer spray.
Initial Installation / Setup Procedures (continued)
10
11
781RC MicroMark Recirculating Spray Marking System
10 www.nordsonefd.com info@nordsonefd.com +1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide.
If factory regulations require system shutdown during evening and /
or weekends or after long periods of pump system shutdown, some
settling may have occurred in your ink or paint.
Before starting to spray mark, it will be important to remix / agitate your
fluid to return settled pigments back into solution.
To remix, follow these simple procedures.
1. Make certain pump is SHUT OFF.
2. Remove lid from reservoir and stir contents in liner until thoroughly
mixed. Replace lid.
3. Open pump box to access internal speed control. (Make notation
of speed control setting to return to this position after remix /
agitation procedure.)
4. Slowly turn Speed Control clockwise to the 2 o’clock–3 o’clock
position. This will dramatically increase flow volume.
5. Close pump box cover and turn pump ON.
6. Let fluid recirculate for 1–2 minutes. This should provide ample
recirculation of fluid in feed lines and spray valve.
* Important note: Do not cycle test the spray valve at this high flow
condition as this will result in excessive spray mark volume!
7. Shut OFF pump. Open pump box cover and return Speed Control
to original cycle setting — about the 9 o’clock position is
sufficient if prior setting is unknown.
8. Close pump cover. Turn pump ON.
9. Cycle test 781RC spray valve until desired spray mark occurs.
Recirculation System Startup Procedures after
Prolonged Periods of Downtime
781RC MicroMark Recirculating Spray Marking System
11www.nordsonefd.com info@nordsonefd.com +1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide.