Hydro 3876GBA-2, 3876GB-2 Quick User Manual
Installation and Operation:
1. Remove cabinet cover. Install the short, white inner discharge tubes on the outlets of the eductors. They go over the
smaller barbed parts on the bottom of the eductors. These tubes must be in place for the eductors to function. The inner
discharge tube for the 14 LPM (yellow) eductor has a yellow flooding ring inside it. The inner discharge tube for the 4.0
LPM (grey) eductor has a grey flooding ring inside it. Install the end of the tube nearest the flooding ring on the eductor's
inner discharge barb. To ensure the IDTs are on correctly, the metal rings should be above the small barbs.
2. Drill holes for the three wall anchors with a 8mm drill bit, using the cabinet back as a template for correct 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 1.8 metres above the bottom of the
concentrate container, nor below the highest concentrate level (never mount your concentrate higher than the
proportioner).
3. 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 not being
used. (This may be used for dispensing water only.) Select and install a metering tip for the single product eductor (on
right hand side) in the same manner.
4. Cut tubing provided into separate supply tubes for each product to be dispensed (tubing allows for 2.1 m of tube per
product). Supply tubes should reach from hose barb 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.
5. Slip open end of each supply tube through an opening in either side of the cabinet and push over a hose barb/metering
tip on the selector valve and on the eductor.
6. Place foot valve ends of supply tubes into concentrate containers. REMEMBER TO CHECK FOOT VALVE STRAINERS
PERIODICALLY FOR CLOGGING: CLEAN IF NECESSARY.
7. A short discharge tube is used with the 4 LPM eductor (selector valve); minimum tube length is 20 cm for correct
operation. A longer tube (1.2 m) is used with the 14 LPM eductor. Slide end of tube over inner discharge tube and onto
eductor discharge outlet. The hose hook supplied may be installed on the long tube to allow it to hang conveniently from
dispenser when not in use.
8. 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.
9. Connect water supply hose of at least 13 mm ID to water inlet swivel. (Minimum 1.7 bar pressure, with water running,
is required for correct operation.) Connect opposite end of hose to water supply. Turn water supply on.
10. Purge air from the system by depressing the buttons briefly. There may be some water discharge from the eductor vents
until the air is purged.
11. 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
at right.) This allows the button to be fully depressed and allows it to latch in
the "on" position. To unlock, PULL THE BUTTON OUT.
12. It is essential that the discharge hose is not obstructed. If discharge is
restricted, water will flow out of the eductor vents. Do not start to
operate the dispenser with liquid in the discharge tube.
AccuDose Series Proportioner Model 3876GBA-2
with HydroGap Air Gap Eductors
Package Should Contain:
1. Proportioner unit.
2. Supply tubing : 6.4m total.
3. Foot valve assemblies & weights (5).
4. Discharge tube for each eductor.
5. Metering tip kits.
6. Mounting anchor kit.
7. Hook for 14 LPM discharge tube.
8. Instruction sheet.
Clip or
bend
these
tabs to
depress
button
into locked
position.
4 LPM 14 LPMTip Colour
APPROXIMATE DILUTIONS
AT 40 PSI FOR WATER-THIN PRODUCTS (1.0 CP)
Orifice Std. Drill
Size Number)
Ratio (per Eductor Flow)
No Tip .187 (3/16) 3:1 6.5:1
Grey .128 (30) 3:1 6.5:1
Black .098 (40) 3:1 7:1
Beige .070 (50) 4:1 10:1
Red .052 (55) 5:1 16:1
White .043 (57) 7:1 20:1
Blue .040 (60) 8:1 24:1
Tan .035 (65) 10:1 30:1
Green .028 (70) 16:1 45:1
Orange .025 (72) 20:1 56:1
Brown .023 (74) 24:1 64:1
Yellow .020 (76) 32:1 90:1
Aqua .018 (77) 38:1 128:1
Purple .014 (79) 64:1 180:1
Pink .010 (87) 128:1 350:1
Metering Tip Selection:
The final concentration of the dispensed solution is
related to both the size of the metering tip opening and
the viscosity of the liquid being siphoned. For waterthin products, the chart at right can be used as a
guideline. If product is noticeably thicker than water,
consult the Measurement of Concentration Procedure below to achieve your desired water-to-product
ratio. Because dilution can vary with water temperature and pressure, actual dilution achieved can only be
ascertained by using the Measurement of Concentration Procedure. The clear, undrilled tip is provided to
permit drilling to size not listed should you need a
dilution ratio that falls between standard tip sizes.
NOTE: A 4 LPM eductor is grey; a 14 LPM eductor is
yellow. Refer to parts diagram if unfamiliar with names
of system components.
Measurement of Concentration:
You can determine the dispensed water-to-product
ratio for any metering tip size and product viscosity. All
that is required is to operate the primed dispenser for
a minute or so and note two things: the amount of
dispensed solution, and the amount of concentrate used in preparation of the solution dispensed. The water-to-product ratio
is then calculated as follows:
Dilution Ratio (X:1) where X =
Amount of Mixed Solution — Amount of Concentrate Drawn
Amount of Concentrate Drawn
Dilution Ratio, then, equals X parts water to one part concentrate (X:1). If the test does not yield the desired ratio, choose
a different tip and repeat the test. Alternative methods to this test are 1) pH (using litmus paper), and 2) titration. Contact your
concentrate supplier for further information on these alternative methods and the materials required to perform them.
AccuDose Parts Diagram:
5
7 8
4 23 1
6
1 238100 Strainer washer
2 10082835 Swivel collar
3 10082806 Swivel stem
4 10075911 Hex nipple
10075950 O-ring (two per nipple)
5 10075925 Pipe plug
6 10080710 Button, dark grey (standard)
10080711 Button, sky blue
10080712 Button, red
10080713 Button, green
10080714 Button, light grey
10080715 Button, yellow
7 10080895 Cabinet
8 10020700 Selector valve grommet
10020900 Back up ring for grommet
9 10075980 Valve parts kit
a. diaphragm, b. armature,
c. spring, d. valve bonnet
10 10079010 Spring
11 10079000 Magnet
12a 160GB 4 LPM Eductor assembly
b 161GB 14 LPM Eductor assembly
c 3401-R Eductor hose barb only
13a 10070170 4 LPM inner discharge tube
b 10070470 14 LPM inner discharge tube
14a 10064794 4 LPM outer discharge tube (18cm)
b 10077315 14 LPM outer discharge tube (1.2 m)
DescriptionPart No.Key
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