Dover Hydro systems HydroChem 919 User manual

Troubleshooting Guide:
Problem Cause Solution
1. No discharge a. No water a. Open water supply
b. Excessive water pressure b. Install regulator if pressure
exceeds 85 PSI
c. Eductor clogged c. Clean* or replace
2. No concentrate draw a. Clogged check valve a. Clean or replace
b. Metering tip clogged b. Rinse in hot water or replace:
DO NOT REAM CLEAN!
c. Eductor clogged c. Clean or replace
d. Clogged water inlet d. Clean screen
e. Clogged foot strainer e. Clean or replace
f. Low water pressure and/or f. Minimum 25 PSI and 4 GPM
volume flow required to operate unit
g. Concentrate container empty g. Replace with full container
h. Check valve not screwed into h. Tighten, but DO NOT OVER
eductor firmly TIGHTEN!
3. Excess concentrate draw a. Metering tip not in place a. Press correct tip firmly into barb
(Or wrong metering tip)
4. Water flow won't shut off a. Ball valve defective a. Replace
5. Leaks at plastic tube a. Compression nut loose a. Tighten nut 1/2 turn
6. Low or no water flow a. Inlet screen clogged a. Clean or replace
b. Supply source inadequate b. 4 GPM flow necessary to unit.
Move unit or replumb incoming
line.
c. Scaled eductor or fittings c. Clean* or replace
7. Backflow into concentrate a. Eductor check valve inoperable a. Clean or replace check valve
* 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.
THANK YOU FOR YOUR INTEREST IN OUR PRODUCTS
protective clothing and eyewear when dispensing chemicals or other materials.
observe safety and handling instructions of the chemical manufacturers.
direct discharge away from you or other persons or into approved containers.
dispense cleaners and chemicals in accordance with manufacturer's instructions. Exercise CAUTION
when maintaining your equipment.
equipment after each use in accordance with instruction sheet.
protective clothing and eyewear when working in the vicinity of all chemicals, filling or emptying equip-
ment or changing metering tips.
re-assemble equipment according to instruction procedures. Be sure all components are firmly screwed
or latched into position.
only to tap water outlets (85 PSI maximum).
WEAR
ALWAYS
ALWAYS
ALWAYS
CLEAN
WEAR
ALWAYS
ATTACH
Hydro Systems manufactures quality proportioning and dispensing equipment. Please use this equipment carefully and observe
all warnings and cautions.
************************************************************ NOTE ********************************************************
Wall mounted, high volume washing, foaming and/or sanitizing proportioner with two product eductors.
HydroChem 919
Multifunction Proportioning and Dispensing System
Package includes:
-- complete unit mounted on stainless steel front plate
-- (2) 7-foot vinyl product suction tubes with foot strainers
-- (1) metering tip kit
-- (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 tip (see section on metering tip selection) and press firmly into hose barb provided at the side
of the eductor. Install product suction tube on hose barb. The strainer end of the suction tube can be dropped
directly into the concentrate container.
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. 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.
5. Turn on water supply to unit. Minimum 25 PSI water pressure is required to operate the unit.
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: You may only use either one product or the rinse feature - only one valve may be
in use at a time.
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.
One clear, undrilled tip is supplied to permit drilling orifice sizes not listed if necessary.
10084409
Rev. C 5/15
Hydro Systems 3798 Round Bottom Road, Cincinnati, OH 45244 Phone: [phone] Fax: [phone]

PARTS LIST (Refer to diagram)
Key # Part Number Description Key # Part Number Description
HydroChem Parts Diagram:
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
water/product mixture, and the amount of concentrate used in preparation of the solution dispensed. The wa-
ter-to-product ratio is then calculated as follows:
Dilution (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.
APPROXIMATE DILUTIONS
AT 40 PSI FOR WATER-THIN PRODUCTS (1.0 CP)
Orifice Std. Drill
Size Number) Ratio
Tip Color
CONVERSION CHART:
Ratio Equivalents to
Standard Measures
Oz./Gal. Ratio %
No Tip .187 (3/16) 10:1 128 1:1 50.0
Gray .128 (30) 10:1 64 2:1 33.3
Black .098 (40) 10:1 32 4:1 20.0
Beige .070 (50) 12:1 21 6:1 14.3
Red .052 (55) 16:1 16 8:1 11.1
White .043 (57) 24:1 14 9:1 10.0
Blue .040 (60) 28:1 8 16:1 5.9
Tan .035 (65) 32:1 6 24:1 4.0
Green .028 (70) 48:1 4 32:1 3.0
Orange .025 (72) 64:1 3 48:1 2.0
Brown .023 (74) 80:1 2 64:1 1.5
Yellow .020 (76) 96:1 1 128:1 0.8
Aqua .018 (77) 128:1 1/2 256:1 0.4
Purple .014 (79) 256:1 1/4 512:1 0.2
Pink .010 (87) 384:1
Lt. Purple .009 (89) 512:1
1 238100 Strainer washer
2 2767-K Connector swivel
3 10091700 Brass top manifold
4 10075925 Pipe plug
5 10084020 Ball valve (includes a)
a 10088100 Yellow handle sleeve
6 10067810 Pipe nipple
7 440800 3.5 GPM eductor
8 10069270 Check valve - Viton*
9 506502 Swivel nut
10 276800 Swivel stem, short
11 10091710 Brass bottom manifold
12 10005803 Nut
13 10091720 Cover
14 605400 Hose hanger
15 10084701 Hex nipple
16 326001 Hose barb, 3/8"NPT x 1/2" barb
17 608300 Hose clamp
18 90087108 Hose, 1/2"ID x 2.88"
19 10027209 Metering tip kit
20 500814 Suction tube
21 509900 Ceramic weight
22 609600 Foot strainer
*EPDM check valve available: order 10069271
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