8
in the hole at the vent end. Push the Vac-Alert
TM
piston towards the adjustment
end until the lockout mechanism is engaged. A clicking sound is heard when the
lockout mechanism is engaged.
2.
Remove the security cap from the adjustment end (white end with Vac-Alert
TM
embossing on body) utilizing the spanner tool shipped with the unit. The security
cap is removed by unthreading it, rotating in a counterclockwise direction. Once
the security cap is removed, the spring compression adjustment screw is visible
inside the Vac-Alert
TM
body. To adjust this screw, a flat bladed (straight slot)
screwdriver is required.
3.
With the Vac-Alert
TM
in the open position, turn the adjustment screw clockwise to
increase spring compression (for higher vacuum operating levels), and counter-
clockwise to decrease spring compression (for lower vacuum operating levels).
¾
To adjust the Vac-Alert
TM
for an operating vacuum level of less
than 5” Hg, rotate the adjustment screw counterclockwise until
the screw travel stop (minimum spring compression setting) is
reached.
¾
To adjust the SVRS unit for an operating vacuum level of up to
15” Hg, rotate the adjustment screw clockwise until the screw
travel stop (maximum spring compression setting) is reached, then
back the adjustment screw off counter-clockwise one revolution.
¾
The adjustment screw must be positioned properly between the
two travel stops to set the Vac-Alert
TM
unit for operating vacuum
levels greater than 5” Hg and less than 15” Hg.
NOTE: Always adjust the Vac-Alert
TM
adjustment screw with the unit in the open
(venting) position. The SVRS can be placed in the open position from the vent end
(gray end) by utilizing a screwdriver. Remove the vent screen and place the
screwdriver in the hole at the vent end. Push the Vac-Alert
TM
piston towards the
adjustment end until the lockout mechanism is engaged. A clicking sound is heard
when the lockout mechanism is engaged. Once screw adjustment is made, the SVRS
can be returned to the closed position by gently pressing down the reset lever.
FINAL ADJUSTMENT
1. The Vac-Alert
TM
should be adjusted to a spring compression level that ensures the
SVRS unit does not lock open during pump start-up. Do not over tighten the
adjustment screw. Adjust the screw in increments of two full rotations, then reset
the unit, and retest for air venting. The SVRS should be tested at various
adjustment levels to determine the balance point at which venting begins to occur
at pump start-up.
2. Once the balance point is determined, the adjustment screw should be positioned
clockwise two (2) full turns beyond this point as the
final SVRS setting.
