Hydro AccuDose 3871GB-2 User manual

Installation and Operation:
1. Remove cabinet cover. Drill holes for the three wall anchors with a 8mm 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
1.8 meters above the bottom of the concentrate container, nor below the highest concentrate level (never mount the
concentrate container 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 colour) 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 an open end of each piece of tubing over one barb
on the valve. Ensure suction tubes are on the barbs far enough to prevent air from leaking into tube.
4. Slide tubes from each side through the notch in the cabinet.
5. Place foot valve end of supply tube assembly into concentrate container. REMEMBER TO CHECK FOOT VALVE
STRAINER PERIODICALLY FOR CLOGGING: CLEAN IF NECESSARY.
6. A short discharge tube is used with a 4 LPM (grey) eductor – Model 3872GB-2 ; minimum tube length is (20 cm) for correct
operation. A longer tube (1.2 m) is used with a 16LPM (yellow) eductor – Model 3871GB-2. Slide end of tube over eductor
discharge outlet. The hose hook supplied with Model 3871GB-2 may be installed on the long tube to allow it 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 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. 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.
10. 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 below)
This allows the button to be fully depressed and allows it to latch in the "on" position. TO UNLOCK, PULL THE BUTTON
OUT.
11. 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.
AccuDoseSeries Proportioner
Models 3871GB-2 & 3872GB-2
Package Should Contain:
1. Proportioner unit.
2. Chemical inlet tubing
assembly with foot valve
& weight.
3. Discharge tube.
4. Metering tip kit.
5. Mounting hardware.
6. Hook for discharge tube
(Model 3871GB-2 only).
7. Instruction sheet.
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 16 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:
423 1
5
1238100 Strainerwasher
210082835 Swivelcollar
310082816 Swivel stem
10075950 O-ring(stem/valveconnection)
410075925 Pipeplug
510080710 Button, dark grey (standard)
10080711 Button,skyblue
10080712 Button,red
10080713 Button,green
10080714 Button,lightgrey
10080715 Button,yellow
610080894 Cabinet
710020700 Selector valve grommet
10020900 Back up ring for grommet
DescriptionPart No.
Key
6
7
No Tip .187 (3/16) 2:1 3:1
Grey .128 (30) 2:1 3:1
Black .098 (40) 2:1 4:1
Beige .070 (50) 3:1 8:1
Red .052 (55) 4:1 14:1
White .043 (57) 5:1 20:1
Blue .040 (60) 6:1 24:1
Tan .035 (65) 8:1 30:1
Green .028 (70) 12:1 45:1
Orange .025 (72) 16:1 56:1
Brown .023 (74) 18:1 64:1
Yellow .020 (76) 24:1 90:1
Aqua .018 (77) 32:1 128:1
Purple .014 (79) 45:1 180:1
Pink .010 (87) 128:1 350:1
Ratio (per Eductor Flow)
16 LPM
Tip Colour
APPROXIMATE DILUTIONS
AT 2.86 BAR FOR WATER-THIN PRODUCTS (1.0 CP)
Orifice Std. Drill
Size Number 4 LPM

910
AccuDose Parts Diagram/List:
a
bc
d
8
15
Suction tube assembly:
attach open ends to barbs
on selector valve
20 20
20
19c
21
22
19a 19a
19b
810075980 Valvepartskit
a. diaphragm, b. armature, c. spring,
d.valvebonnet
910079010 Spring
10 10079000 Magnet
11 10035310 Siphonbreaker
12 270702 Washer
13 a440215 4 LPM Eductor kit (grey)
b441210 16 LPM Eductor kit (yellow)
14 a6422-A 4 LPM discharge tube
b10074815 16 LPM discharge tube
15* 10080730 Hose hook, dark grey (std)
10080731 Hose hook, sky blue
10080732 Hose hook, red
10080733 Hose hook, green
10080734 Hose hook, light grey
10080735 Hose hook, yellow
* Hose hook provided with Model 3871GB-2 only
16 10061100 Support
17 10080920 Selector valve replacement kit:
e. Suction stub, f. O-ring, g. selector valve
assembly
18 690014 Metering tip (kit)
19 a10068730 Tubing, 6mm x 63.5mm
b10062550 Tubing, 6mm x 600mm
c500870 Tubing, 6mm x 2.1 m
20 10068720 Barbed Y fitting
21 509900 Weight
22 10076301 Foot valve -- Viton (EPDM also available. Order 10076302.)
NOT SHOWN:
641750 Security screws (cabinet sides)
DescriptionPart No.
Key
11
12
13
e
16
14
fg
17
17

Troubleshooting Chart:
*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.
1. No discharge a. No water a. Open water supply
b. Magnetic valve not functioning b. Install valve parts kit
c. Excessive water pressure c. Install regulator if water pressure
exceeds
60 PSI (flowing)
d. Eductor clogged d. Clean* or replace
2. No concentrate draw a. Clogged foot valve a. Clean or replace
b. Metering tip or eductor has b. Clean (descale)* or replace
scale build-up
c. Low water pressure c. Minimum 20 PSI (with water running)
required to operate unit properly
d. Discharge tube(s) not in place d. Push tube firmly onto eductor discharge
or flooding ring missing from hose barb; be sure inner discharge tube
inner discharge tube is installed and has flooding ring.
e. Concentrate container empty e. Replace with full container
f. Inlet hose barb not screwed f. Tighten, but do not overtighten
into eductor tightly
g. Clogged water inlet strainer g. Disconnect inlet water line and clean
strainer
h. Selector out of position h. Assure selector is in position desired
3. Excess concentrate draw a. Metering tip not in place a. Press correct tip firmly into barb on
eductor
b. Chemical above eductor b. Place concentrate below the eductor
4. Failure of unit to turn off a. Water valve parts dirty or a. Clean* or replace with valve parts kit
defective
b. Magnet doesn't fully return b. Make sure magnet moves freely.
c. Push button stuck c. Remove button and clean cabinet/button
to remove any dirt lodged in slide recess
5. Excess foaming in discharge a. Air leak in pick-up tube a. Put clamp on tube or replace tube if brittle
b. Inner discharge tube not in place b. Install inner discharge tube
6. Water discharge from air a. Restricted discharge hose a. Be sure discharge tube is not immersed,
vents on eductor kinked or elevated. Be sure there is no
liquid in the discharge tube when begin-
ning to operate dispenser
b. High water pressure b. Install pressure regulator if flowing water
pressure exceeds 60 PSI (flowing)
SolutionCause
Problem
10084448
Proportioning & Dispensing Equipment
Hydro Systems Europe Ltd
Unit 3, The Sterling Centre
Eastern Road
Bracknell
Berks.
RG12 2PW ENGLAND
Tel: [phone]
Fax: [phone] www.hydrosystemseurope.com