Hydro 38741GB, 38751GB Quick User Manual

AccuDose Series Proportioner

Models 38741GB & 38751GB

with E-Gap Eductors

Package Should Contain:

1. Proportioner unit.

2. Supply tubing 6.4m total.

3. Foot valve assemblies & weights (5).

4. Discharge tubing for each eductor.

5. Metering tip kits.

6. Mounting anchor kit.

7. Hose hook for 14 LPM eductor.

8. Instruction sheet.

Installation and Operation:

1. Remove cabinet cover. Drill holes for the three wall anchors with an 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).

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 not being
used. (This may be used for dispensing water only).

3. Attach the chemical suction tube assembly to the selector valve, sliding the open end of each piece of tubing over
one barb on the valve. Make sure suction tubes are on the barb far enough to prevent air from leaking into tube.

4. Slip other end of supply tube through an opening in either side of the cabinet and slide a ceramic weight over the
tube, then push a footvalve into the end of the tube. (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 4 LPM eductor; minimum tube length is 20cm for correct operation. Longer
tubes (1.2 m) are used with a 14 LPM 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
longertubes to allow discharge tube to 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 13mm ID to water inlet swivel. (Minimum 1.76 Bar pressure, with water running,
is required for correct 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 wishto 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 pushed fully in and so lock in the “on” position. To unlock, PULL THE BUTTON OUT.

Clip or bend
these tabs to
depress
button into
locked
position.

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 water-thin 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.

Dilution Ratio (X:1) where X = Amount of Mixed Solution — 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.

AT 40 PSI FOR WATER-THIN PRODUCTS (1.0 CP)

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

Amount of Concentrate Drawn

APPROXIMATE DILUTIONS

Orifice Std. Drill
Size Number)

Ratio (per Eductor Flow)

1 GPM 3.5 GPMTip Color

AccuDose Select Parts Diagram List:

4

6

3

2

1

5

Key DescriptionPart No.

1 238100 Strainer washer
2 10082835 Swivel collar (moulded)
3 10082816 Swivel stem (moulded)

10075950 O-ring (two per nipple)
4 10075925 Pipe plug
5 10080710 Button, grey (standard)

10080711 Button, sky blue

10080712 Button, red

10080713 Button, green

10080714 Button, light grey

10080715 Button, yellow
6 10080894 Cabinet
7 10020700 Selector valve grommet

7

10020900 Back up ring for grommet