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 HydroGap
TM
Air Gap Eductors
Package Contains:
1. Proportioner unit.
2. Chemical inlet tubing .
3 Foot 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.
