Lafferty 920118 Installation instructions

Lafferty Equipment Manufacturing, LLC
Installation & Operation Instructions
Model # 920118 · Rinse / Pump Fed Foam Hose Drop Station
# 224150
# 491409
# 491411
# 491348SS-T
# 150350-1
# 491306
# 536603-X
REQUIREMENTS
Ready-to-Use Chemical Solution
Temperature up to 160°F
Pressure 35 to 125 PSI
Flow 1.7 GPM @ 40 PSI
Supply Line 3/4"
Compressed Air up to 3 CFM
Hose
Foam 3/4" ID x 50'
Rinse 3/4" ID x 50'
Nozzle
Foam 50250
Rinse 4 Hole Rinse Nozzle
OPTIONS
Stainless Steel Hose Racks
Large Stainless Steel Hose Rack
Foam Solution Check Valves & Strainer
Check Valve, PP, 1/2'' (EPDM)
Check Valve, PP, 1/2'' (Viton)
Check Valve, 316SS, 1/2", MF (Teflon)
Strainer, "Y", SS, 1/2" MF
Alternate Air Check Valve - EPDM Standard
Check Valve, Air, SS, 1/4" MM (Viton /
Hast)
Stainless Steel Foam Wand (Upgrade)
Convert PP Wand to SS (New Units)
WEIGHT & DIMENSIONS
Single Package
Shipping Weight 42 lbs.
Shipping Dimensions 28" x 28" x 8"
www.laffertyequipment.com
501-851-2820
OVERVIEW
The Rinse/Pump Fed Foam Hose Drop Station is a medium volume foam applicator for projecting ready-to-use foaming chemicals and for rinsing. This unit receives
ready-to-use chemical solution from a central chemical feed system and creates rich, clinging foam by injecting compressed air into the solution to greatly increase
volume and coverage ability. The foam is then projected through the discharge hose and fan nozzle on to any surface up close or at distances up to 12 feet. Rinse
through a separate hose with a unique and powerful 4-hole nozzle.
W AR N I N G ! R E A D A L L
I N S T R U C T I O N S B E F O R E
U S I N G E Q U I P M E N T !
Lafferty Equipment Manufacturing, LLC • 5614 Oak Grove Road • North Little Rock, Arkansas 72118

SAFETY & OPERATIONAL PRECAUTIONS
For proper performance do NOT modify, substitute nozzle, hose diameter or length.
Manufacturer assumes no liability for the use or misuse of this unit.
Wear protective clothing, gloves and eye-wear when working with chemicals.
Always direct the discharge away from people and electrical devices.
For pressures over 100 PSI, remove the discharge valve or lower pressure
Follow the chemical manufacturer’s safe handling instructions.
Turn off solution supply and air when unit is not in use for extended periods.
TO INSTALL (REFER TO DIAGRAM ON NEXT PAGE)
A check valve is required on the foamer solution inlet to prevent air from going back into the solution line. (See
Options)
1. Mount the unit to a suitable surface.
2. Connect the discharge hoses as shown in the diagram and close the ball valves.
3. Install a solution check valve on the foamer solution inlet(s) and connect pre-mixed solution supply.
4. To prevent blocking the small jets, flush any new plumbing of debris before connecting. (And/or install a strainer)
5. Connect compressed air supply. If piping is older and has known contaminants, install a filter.
TO OPERATE
Always make sure the discharge is closed or pointed in a safe direction before turning inlet valve on. Discharge
can be shut off at any time during operation but should not be left off for long periods of time with the inlet
valve on.
TO FOAM
1. With wand in hand open the inlet ball valve, and the air ball valve.
Wait a few seconds and observe foam consistency.
Use the least amount of air needed to achieve good foam quality to prevent solution pressure
fluctuations from affecting performance. Air pressure must be kept lower than solution pressure.
To adjust the foam consistency pull out on the air regulator knob, turn slightly clockwise for dryer foam
and counterclockwise for wetter foam. Wait a few seconds to see each adjustment.
Medium wet foam will give the best cleaning results! Dry foam will NOT clean as well!
You may also have to try different chemical ratios and air settings until foam consistency and cleaning
results are acceptable. Once this is set and desired foam consistency is achieved push lock the knob.
you are ready to start application.
2. When foaming is completed, close the discharge ball valve, return to the unit and close the solution and air ball
valves. Briefly re-open the discharge ball valve to relieve pressure in the hose. Rinse before the foam dries.
TO RINSE
1. With spray wand in hand and the discharge ball valve closed open the inlet ball valve.
2. Open the discharge ball valve to rinse.
3. When complete, close the discharge ball valve then close the inlet ball valve.
4. Briefly re-open the discharge ball valve to relieve pressure in hose.
UNIT FLOW RATES
PSI GPM
FOAM RINSE
35 1.59 6.73
40 1.70 7.20
50 1.90 8.05
60 2.08 8.82
70 2.25 9.52
80 2.40 10.18
90 2.55 10.80
100 2.69 11.38
110 2.82 11.94
120 2.94 12.47
125 3.01 12.73
920118 • Rinse / Pump Fed Foam Hose Drop Station
- Page 2 -

920118 • Rinse / Pump Fed Foam Hose Drop Station
- Page 3 -

Troubleshooting Guide
Problem Possible Cause / Solution
Startup Maintenance
A) Foam surges and/or hose "bucks".
B) Foam too wet.
C) Foam does not clean properly or too dry.
D) Chemical solution backing up into air line.
1, 2, 3, 4, 5, 6, 7, 8
2, 3, 4, 5, 6
1, 4, 9
11
10, 12, 13
10, 12, 13
10
Possible Cause / Solution
Startup Maintenance
1. Air pressure too high
Adjust the air regulator slowly counterclockwise until
output stabilizes.
2. Use of an oiler in the airline will cause poor foam quality
Use only clean, dry air.
3. Inlet ball valve or discharge ball valve not completely open
Completely open the inlet and discharge ball valves.
4. Improper chemical or solution too weak
Ensure product is recommended for foaming and/or the
application. Increase chemical concentration.
5. Discharge hose too long, wrong size, kinked or
spliced/sectioned together (SEE REQUIREMENTS)
Straighten the hose - Replace hose with correct size or
one piece continuous hose.
6. Nozzle size is wrong (SEE REQUIREMENTS)
7. Solution pressure or volume too low/inlet piping too small
Increase solution pressure or volume (SEE
REQUIREMENTS).
8. Air backing up into solution line
Install optional solution check valve (see OPTIONS,
page 1).
9. Soil has hardened on surface; always rinse foam before it
dries
Reapplication may be necessary.
10. Air regulator failed allowing too much air or not enough air
Clean or replace.
11. Air check valve failed
Replace.
12. Inlet orifice clogged
Check/clean inlet orifice for obstructions. DO NOT
DRILL OUT. Install optional solution "Y" strainer (see
OPTIONS, page 1).
13. Chemical build-up may have formed in the body causing
restriction
Carefully remove fittings and soak entire body in
descaling acid.
PREVENTIVE MAINTENANCE: When the unit will be out of service for extended periods, run water through the system to flush the chemical and help
prevent chemical build-up.
920118 • Rinse / Pump Fed Foam Hose Drop Station
May 4th 2022 - Page 4 -