Nova-Tech LMI Roytronic Excel Series AD Metering Pump - Manual (Page 12)

12
INSTALLATION
3.5 Four-Function Valve Installation
To install a 4-FV, the 4-FV Fitting and Coupling Nut should be
assembled with the appropriate cartridges into the discharge port
of the pump. Use a 13/16” or 20 mm socket to tighten fitting. Tight-
ening to 50 inch-pounds is recommended. Do not over tighten.
To assemble the Four-Function Valve Body, insert the large opening
on the Four-Function Valve Body into the 4-FV Coupling Nut and
hand tighten. You can position the valve to have the Bleed Nut
pressure relief port in any convenient location by tightening the
4-FV Coupling Nut with the Bleed Nut positioned 90º CCW from
desired location, then holding the 4-FV Coupling Nut stationery
while turning the 4-FV Valve Body the final 90º to desired position.
Next, insert the ¼” tubing through the Bleed Nut. Ensure that about
¼” (6 mm) of tubing is protruding through the tip of the Bleed Nut.
Firmly hand tighten the Bleed Nut in the hole on the side of the
4-FV. This tubing should be routed back to the supply tank. To
ensure proper function of the priming function, the end of this
tubing should not be submerged in the solution.
This return line tubing must be secured to ensure pumped solution will safely return to supply
tank.
3.6 FastPrime™
The FastPrime ™ Head is equipped with a valve that allows for opening the head to at-
mospheric pressure. When installing a pump equipped with a FastPrime ™ Head connect
the 3/8" outer diameter clear vinyl tubing provided with the pump to the barbed nozzle.
Route the vinyl return line back to the solution tank. This tubing must not be submerged
in the solution.
Four-Function Valve Tubing Connection
FastPrime TM Valve
FastPrime™ Head
3/8" Clear Vinyl Tubing