Dover Hydro 3874-2 Manuel de démarrage rapide
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Troubleshooting Chart:
Problem
Cause
1. No discharge
a. No water
b. Magnetic valve not functioning
c. Excessive water pressure
d. Eductor clogged
2. No concentrate draw
a. Clogged check valve
b. Metering tip or eductor has
scale build-up
c. Low water pressure
d. Discharge tube(s) not in place
or flooding ring missing from
inner discharge tube
e. Concentrate container empty
f. Inlet hose barb not screwed
into eductor tightly
g. Clogged water inlet strainer
h. Selector out of position
3. Excess concentrate draw
a. Metering tip not in place
b. Chemical above eductor
4. Failure of unit to turn off
a. Water valve parts dirty or
defective
b. Magnet doesn't fully return
c. Push button stuck
5. Excess foaming in discharge
a. Air leak in pick-up tube
b. Inner discharge tube not in place
6. Water discharge from air
a. Restricted discharge hose
vents on eductor
b. High water pressure
* In hard water areas, scale may form inside the discharge end of the eductor, as well as in other areas of the unit that are
exposed to water. This scale may be removed by soaking the eductor in a descaling solution (deliming solution). To remove
an eductor located in the cabinet, firmly grasp water valve and unthread eductor. Replace in same manner. Alternatively,
a scaled eductor can be cleaned (or kept from scaling) by drawing the descaling solution through the unit. Operate the unit
with the suction tube in the descaling solution. Operate the unit until solution is drawn consistently, then flush the unit by
drawing clear water through it for a minute. Replace concentrate container and put suction tube into concentrate.
Hydro Systems 3798 Round Bottom Road, Cincinnati, OH 45244
Solution
a. Open water supply
b. Install valve parts kit
c. Install regulator if water pressure exceeds
60 PSI (flowing)
d. Clean* or replace
a. Replace check valve
b. Clean (descale)* or replace
c. Minimum 20 PSI (with water running)
required to operate unit properly
d. Push tube firmly onto eductor discharge
hose barb; be sure inner discharge tube
is installed and has flooding ring.
e. Replace with full container
f. Tighten, but do not overtighten
g. Disconnect inlet water line and clean
strainer
h. Assure selector is in position desired
a. Press correct tip firmly into barb on
eductor
b. Place concentrate below the eductor
a. Clean* or replace with valve parts kit
b. Make sure magnet moves freely.
c. Remove button and clean cabinet/button
to remove any dirt lodged in slide recess
a. Put clamp on tube or replace tube if brittle
b. Install inner discharge tube
a. Be sure discharge tube is not immersed,
kinked or elevated. Be sure there is no
liquid in the discharge tube when begin-
ning to operate dispenser
b. Install pressure regulator if flowing water
pressure exceeds 60 PSI (flowing)
Phone: (513) 271-8800
Fax: (513) 271-0160
10084445
Rev. A 3/05
AccuDose
Series Proportioner Models 3874-2 & 3875-2
THANK YOU FOR YOUR INTEREST IN OUR PRODUCTS
Please use this equipment carefully and observe all warnings and cautions.
****************************************************** NOTE ****************************************************
protective clothing and eyewear when dispensing chemicals or other
WEAR
materials.
ALWAYS
observe safety and handling instructions of the chemical manufacturers.
ALWAYS
direct discharge away from you or other persons or into approved containers.
ALWAYS
dispense cleaners and chemicals in accordance with manufacturer's
instructions. Exercise CAUTION when maintaining your equipment.
KEEP
equipment clean to maintain proper operation.
WEAR
protective clothing and eyewear when working in the vicinity of all
chemicals, filling or emptying equipment or changing metering tips.
ALWAYS
re-assemble equipment according to instruction procedures. Be sure all
components are firmly screwed or latched into position.
ATTACH
only to tap water outlets (85 PSI maximum).
Installation and Operation:
1 . Remove cabinet cover. Drill holes for the three wall anchors with a 5/16" drill bit, using the cabinet back as a template
for proper spacing of the mounting screws. Install mounting anchors, and then screws in top two anchors. Slide key
holes in cabinet back over screw heads, tighten screws, then install bottom screw. Do not mount more than 6 feet
(1.8 meters) above the bottom of the concentrate container, nor below the highest concentrate level (never mount
your concentrate higher than the proportioner).
2 . Select metering tips (up to 4) for the selector valve. (see next two sections) Push each tip firmly into a separate hose
barb extending from the selector valve. A tip with no hole (clear plastic) can be used to block any valve port being
used. (This may be used for dispensing water only).
3. Cut tubing provided into separate supply tubes for each product to be dispensed (tubing allows 7 feet of tube per
product). Supply tubes should reach from hose barbs on the selector valve body and eductor to bottom of concentrate
containers. Slide ceramic weights over one end of each tube and slide foot valves into the same ends of the tubes.
4 . Slip other end of supply tube through an opening in either side of the cabinet and push over the hose barb/metering
tip on the eductor. (Repeat for all eductors.)
5 . Place foot valve ends of supply tubes into concentrate containers. REMEMBER TO CHECK FOOT VALVE STRAINERS
PERIODICALLY FOR CLOGGING: CLEAN IF NECESSARY.
6 . A short discharge tube is used with the 1GPM eductor; minimum tube length is 8 inches (20cm) for proper operation.
Longer tubes (4 feet) are used with a 4 GPM eductor. Do not remove the flooding rings from inside the tubes. Slide
end of tube with flooding ring over eductor discharge outlet. (Repeat for all eductors.) Hooks may be installed on longer
tubes to allow discharge tube to conveniently hang from dispenser when not in use.
7 . Replace cabinet cover. Push the sides in, behind the latch holes, to snap the cover in place. The two screws provided
may be installed in the holes in the cabinet sides to prevent easy removal of cover.
8 . Connect water supply hose of at least 1/2" ID to water inlet swivel. (Minimum 25 PSI pressure, with water running,
is required for proper operation.) Connect opposite end of hose to water supply. Turn water supply on.
9 . Push button to start flow of desired water/concentrate solution, and hold until supply tube is primed (filled). Then
push the button whenever dispensing is desired, and release button to stop flow of solution.
If you wish to be able to lock the button in the "on" position: clip or bend the two tabs behind the lower front portion
of the button (see diagram). This allows the button to be fully depressed and allows it to latch in the "on" position.
To unlock, pull the button out.
Package Should Contain:
1. Proportioner unit.
2. Chemical inlet tubing.
3. Footvalves (4) and
weights (4).
4. Discharge tubie
5. Metering tip kit.
6 . Mounting anchor kit.
7. Hook for discharge tube
(Model 3874-2 only.)
8. Instruction sheet.
Clip or
bend
these
tabs to
depress
button
into locked
position.