Hydro systems HydroChem 912 Quick Start Manual

Troubleshooting Guide:

Problem Cause
1. No discharge a. No water
b. Excessive water pressure
c. Eductor clogged
2. No concentrate draw a. Clogged check valve
b. Metering tip clogged
c. Eductor clogged
d. Clogged water inlet
e. Clogged foot strainer
f. Low water pressure and/or
volume
g. Concentrate container empty
h. Check valve not screwed into
eductor firmly
3. Excess concentrate draw a. Metering tip not in place
(Or wrong metering tip)
4. Water flow won't shut off a. Ball valve defective
5. Leaks at plastic and a. Compression nut loose
copper junctions
6. Low or no water flow a. Inlet screen clogged
b. Supply source inadequate
c. Scaled eductor or fittings
7. Backflow into concentrate a. Eductor check valve inoperable
* In hard water areas, scale (mineral deposits) may form at the discharge of the eductor. This scale may be
removed by soaking the eductor in a descaling (deliming) solution or by running the descalant through the
system. When removing an eductor for soaking, firmly grasp the eductor and unthread the adapters located
above and below the eductor. Replace in the same manner.
Solution
a. Open water supply
b. Install regulator if pressure
exceeds 85 PSI
c. Clean* or replace
a. Clean or replace
b. Rinse in hot water or replace:
DO NOT REAM CLEAN!
c. Clean or replace
d. Clean screen
e. Clean or replace
f. Minimum 25 PSI and 4 GPM
flow required to operate unit
g. Replace with full container
h. Tighten, but DO NOT OVER
TIGHTEN!
a. Press correct tip firmly into barb
a. Replace
a. Tighten nut 1/2 turn
a. Clean or replace
b. 4 GPM flow necessary to unit.
Move unit or replumb incoming
line.
c. Clean* or replace
a. Clean or replace check valve
Hydro Systems Company
3798 Round Bottom Rd.
Cincinnati, OH 45244
Phone: 513-271-8800
10069291 Rev. F
2/02
HydroChem Model 912
Multifunction Proportioning and Dispensing System
Wall mounted, high volume washing, foaming and/or sanitizing proportioner with two product eductors.
THANK YOU FOR YOUR INTEREST IN OUR PRODUCTS
Hydro Systems manufactures quality proportioning and dispensing equipment. Please use this equipment carefully and
observe all warnings and cautions.
************************************************************ NOTE ********************************************************
WEAR
protective clothing and eyewear when dispensing chemicals or other materials.
ALWAYS
observe safety and handling instructions of the chemical manufacturers.
ALWAYS
direct discharge away from you or other persons or into approved containers.
ALWAYS
dispense cleaners and chemicals in accordance with manufacturer's instructions. Exercise
CAUTION when maintaining your equipment.
CLEAN
equipment after each use in accordance with instruction sheet.
WEAR
protective clothing and eyewear when working in the vicinity of all chemicals, filling or emptying
equipment or changing metering tips.
ALWAYS
re-assemble equipment according to instruction procedures. Be sure all components are firmly
screwed or latched into position.
ATTACH
only to tap water outlets (85 PSI maximum).

Package includes:

-- complete unit mounted on stainless steel back plate with formed ABS plastic cover
-- (2) 7-foot vinyl product suction tubes with foot strainers
-- (2) metering tip kits
-- (4) screws and (4) wall anchors for wall mounting (use 9/32" drill)
-- parts list and product structure diagram

Instructions for Operation:

1. Attach unit to wall using hardware provided.
2. Select metering tips (see section on metering tip selection) and press tips firmly into hose barbs provided at
the side of the eductors. Install product suction tubes on hose barbs. The strainer end of the suction tubes can
be dropped directly into the concentrate containers.
3. Connect water inlet hose with 3/4" male garden thread to female swivel at top left side of unit. Tighten to avoid
leaking.
4. Connect discharge hose to male 3/4" discharge provided at bottom of unit.
5. Turn on water supply to unit. Minimum 25 PSI water pressure and 4 GPM flow are required to operate the unit.
Hose of 1/2" ID is recommended if the hose length will be 50 feet or less. Use 3/4" ID hose if the total length
of the hose will exceed 50 feet.
6. Turn on product valve to begin proportioning and dispensing. Shut off the valve and turn on rinse (bottom) lever
for full volume rinse.
NOTE: By removing the four cover-attaching screws (two top and two bottom), the cover can be removed by
sliding it to the RIGHT (handles in the horizontal, or OFF position). Reassembly is the reverse of this
process: Align the handles with holes in the cover and slide the cover on from right to left. Replace the
screws.

Metering Tip Selection:

The final concentration of the dispensed solution is related to the size of the metering tip orifice, the viscosity of the
liquid being siphoned, water pressure, water flow rate, and other factors in the application. A chart is provided on
the next page which can be used as a guideline for selecting a metering tip when proportioning water-thin
concentrates. Test the actually achieved dilution using the Measurement of Concentration procedure discussed
on the next page. If product viscosity is greater than that of water, choose a tip with a larger orifice than that which
would deliver the desired water-to-product ratio for a water-thin product. Test the actually achieved ratio using the
Measurement Of Concentration procedure on the next page. Continue to choose and test tips until the desired
dilution is achieved. Two clear, undrilled tips are supplied to permit drilling orifice sizes not listed if necessary.