Hydro AccuDose 3874GBA-2 Instruction 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 3.5 GPM (yellow) eductor has a yellow flooding ring inside it. The inner discharge tube
for the 4 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 must be above the small
barbs.
2. Drill holes for the three wall anchors with a 6mm 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, or below the highest concentrate level (never mount 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 color) can be used to block any valve port not
being used. (This may be used for dispensing water only.)
4. Cut tubing supplied for chemical inlet (6mm ID) into lengths required so that tubes reach from barbs on selector valve
to bottom of concentrate containers. For each inlet tube, slide a weight over one end and slip end over the barb on
a footvalve. Slide weight down to foot valve and attach opposite end of each tube over one of the hose barbs on the
selector valve.
5. Slide tubes from each side through the notches in the cabinet.
6. Place footvalve 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 a 4 LPM (grey) eductor – Model 3875GBA-2 ; minimum tube length is 20 cm
for correct operation. A longer tube (1.2m) is used with a 14 LPM (yellow) eductor – Model 3874GBA-2. Slide end
of tube over inner discharge tube and onto eductor discharge outlet. The hose hook supplied with Model 3874GBA-
2 may be installed on the long tube to allow it to hang 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 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.
10. Purge air from the system by pressing 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 required, 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. (Seediagram
below.) 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 3874GBA-2 & 3875GBA-2
with HydroGapTM Air Gap Eductors
Package Contains:
1. Proportioner unit.
2. Chemical inlet tubing .
3Foot valves (4) and
weights (4).
3. Discharge tube.
4. Metering tip kit.
5. Mounting hardware.
6. Hook for discharge tube
(Model 3874GBA-2 only).
7. Instruction sheet.
Clip or
bend
these
tabs to
depress
button
into locked
position.

4 LPM 14 LPMTip Colour
APPROXIMATE DILUTIONS
AT 2.86 BAR 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 water-
thin products, the chart at left 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 ascer-
tained 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:
4
6 7
23 1
5
1238100 Strainer washer
210082835 Swivel collar
310082806 Swivel stem
10075950 O-ring (stem /valve connection)
410075925 Pipe plug
510080710 Button, dark grey (standard)
10080711 Button, sky blue
10080712 Button, red
10080713 Button, green
10080714 Button, light grey
10080715 Button, yellow
610080894 Cabinet Set
710020700 Selector valve grommet
10020900 Back up ring for grommet
DescriptionPart No.Key

910
11a
11b
12a
12b
13a
13b
16
AccuDose Parts Diagram/List:
a
bc
d
8
14
16
15
ef g
Suction tube assembly
(materials for 4 provided):
attach open ends to barbs
on selector valve
18
19
17
810075980 Valve parts kit
a. diaphragm, b. armature,
c. spring, d. valve bonnet
910079010 Spring
10 10079000 Magnet
11 a160GB 4 LPM Eductor kit (grey)
b161GB 14 LPM Eductor kit (yellow)
Kits include inner and outer
discharge tubes
12 a10070170 4 LPM inner discharge tube
b10070470 14 LPM inner discharge tube
13 a10064794 4 LPM outer discharge tube
b10077315 14 LPM outer discharge tube
14* 10080720 Hose hook, dark grey (std)
10080721 Hose hook, sky blue
10080722 Hose hook, red
10080723 Hose hook, green
10080724 Hose hook, light grey
10080725 Hose hook, yellow
* Hose hook provided with
Model 3874GBA-2 only
15 10080920 Selector valve replacement
kit:
e. Suction stub, f. O-ring,
g. selector valve assembly
16 690014 Metering tip (kit)
17 500870 Tubing, 6mm x 2.1 m
18 509900 Weight
19 10076301 Foot valve -- Viton (EPDM
also available. Order
10076302.)
NOT SHOWN:
641751 Security screws (cabinet
sides)
Key DescriptionPart No.

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 4.3 Bar (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 1.76 Bar (flowing) is
required to operate unit correctly
d. Discharge tube(s) not in place d. Push tube firmly onto eductor
or flooding ring missing from hose barb; ensure inner discharge
inner discharge tube 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. Ensure 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. Make sure discharge tube is not
vents on eductor immersed, kinked or elevated. Ensure
there is no liquid in the discharge tube
when beginning to operate dispenser
b. High water pressure b. Install pressure regulator if flowing
water pressure exceeds 4.3 Bar
Solution
Cause
Problem
10082112
Hydro Systems Europe Ltd, Unit 3 The Sterling Centre, Eastern Road, Bracknell, Berks. RG12 2PW U.K.
Tel: [phone]
Fax: [phone]
www.hydrosystemseurope.com