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574CL & 575CL FOR CORROSIVE LIQUID CHEMICALS
5. OPERATION:
The MixRite will operate as soon as water is allowed to flow through it. If the pump is operating but not
drawing, check #7 below if you have model 574, otherwise, check #8 below if you have model 575.
ADJUSTING THE DEMA MIXRITE:
6.
Directions to adjust the volume (ratio) of the liquid chemical.
Use the Percent/Ratio scale found on the lower half of the MixRite
1.
proportioner to preset the amount of chemical desired.
adjust past the last marking.
Loosen the Lower Nut Latch (ring collar below the adjusting sleeve).
2.
Turn the Adjusting Sleeve clockwise to increase the amount of
3.
chemical (the Adjuster will go UP the scale).
Turn the Adjusting Sleeve counterclockwise to decrease the amount
4.
of chemical (the Adjuster will go DOWN the scale).
After adjusting for the proper amount of chemical retighten the Lower Nut Latch (ring collar).
5.
7. AIR-RELEASE VALVE FOR MODEL: 574
To release air from the DEMA MixRite, apply pressure to the cap (Air Release Valve)
for several seconds to open valve that allows trapped air to escape. This air release is
accompanied by a slight loss of water.
8. ON/OFF AND AIR-RELEASE VALVE FOR MODEL: 575
1. To turn the unit off (pumping stops but there is still free flow of water through the
MixRite):
Push the handle in and turn it clockwise so that it is in the closed state.
2. To turn the unit on (pumping action resumes as water still flows through the
MixRite):
Turn the handle counterclockwise and pull it out so that it is in the
opened state.
3. To release air from the DEMA MixRite:
Turn the handle and pull it out so that it is in the opened state.
Locate the nut beneath the handle.
Turn the nut counterclockwise until the two bleed holes are
exposed.
Push down on the handle until water comes out of the bleed
holes. After the air is bled off, turn the nut clockwise until it is
tight again.
I-871
Rev. C-34072
1/14/09
DEMA MIXRITE PROPORTIONING PUMP
MODELS 574 & 575
INSTALLATION INSTRUCTION
Do not
PRESS TO
RELEASE AIR
NUT
Page 4
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