Nova-Tech Pulsatron Plus Series T7 - Manual (Page 12)

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Apply grease to areas of the diaphragm that contact the deflection plate.
Slide the diaphragm deflection plate onto the back of the diaphragm stud, radius side towards the diaphragm. Next slide
two shims onto the diaphragm threaded stud and screw the diaphragm into the EPM unit. Refer to Figure 14. Turn
diaphragm clockwise until deflection plate and shims are tight against solenoid shaft and the diaphragm stops turning. If
there is a gap between the adaptor and diaphragm, repeat the procedure removing one shim each time until the
diaphragm just touches the adaptor or is slightly recessed.
If not already done, adjust stroke length to 50%. Place the pump head onto the adaptor with valve flow arrows pointing up
and install and tighten pump head screws. Tighten screws until pump head pulls up against adaptor.
NOTE: Adjust stroke length only when pump is running!
Adjust stroke length back to 100% for easier priming and place pump back into service.
6.4 Valve Replacement
Flush pump to clean any chemical from pump head.
Unplug pump, release system pressure, and disconnect tubing or piping.
Unscrew valve cartridges and discard. Also remove o-rings down inside the pump head.
Install new valve cartridges with stamped letters reading from top to bottom, and the arrow pointing in the direction of flow.
Hand-tighten only, do not use wrenches or pliers.
Reconnect tubing or piping and reinstall the pump.
Check for leaks around newly installed fittings.