Magnum Venus Plastech DP-1000 (EPO3) - Manual (Page 31)

(Figure 37. Nitrogen Charging System)
 Remove the valve body cap on the top of both accumulators.
Note: Do n ot switch valve body caps between accumulators. The hardener pump’s cap must be returned to
hardener pump to avoid contamination.
 Clean the end of an allen wrench or flat-end rod and insert in the top of the accumulator valve,
press down until all air escapes.
 Attach nitrogen lines to the tops of the accumulators. Always use the same hose on the same
accumulator to avoid contamination.
 Hand tighten the nitrogen hoses to the accumulators. Make sure the nitrogen tank’s regulator is
closed (turn counterclockwise).
 Slowly open the main valve of the nitrogen tank one or two turns (see Figure 34 on previous
page).
 Slowly turn the T-handle clockw9ise until the regulator gauge pressure equals the lower of the
two fluid pressures you found while spraying.
 Slowly t urn the regulator’s T-handle counterclockwise until it is turned off.
 Disconnect the nitrogen hoses from the accumulators.
 Check to see if the valve bodies are leaking by listening for hissing sounds.
 Replace the valve body cap- finger tighten only.
 Listen at the recirculation hose for hissing.
If you hear the charge escaping through the gun-head, the polyball in one or both of the accumulators is
probably not seating and must be cleaned or replaced.
If air still escapes the accumulator, replace the quad ring seal in the charging valve.
Many operators find this system preferable to hand charging. However, nitrogen bottles must be kept in
inventory. The key advantage to nitrogen charging is the assurance that there is not moisture in the charge.
Compressed air often has moisture contamination even with the highest quality refrigeration air frying systems.