Lafferty Equipment Manufacturing, LLC

Installation & Operation Instructions

Model # 975123 · WR-1 Spray / Rinse W/ Pistol Grip Gun

Requirements

Chemical Concentrate
Water
Temperature up to 160°F
Pressure 35 to 125 PSI
Flow 4 GPM @ 40 PSI
Supply Line 1/2"
Hose
Spray 1/2" ID x 50'
Rinse 1/2" ID x 50'
Nozzle
Spray 2550
Rinse 2550

Options

Stainless Steel Hose Racks
Large Stainless Steel Hose Rack# 224150
Stainless Steel Jug Racks
1 Gallon Round/Square# 224200
1 Gallon Round/Square Locking# 224200-L
2 ½ Gallon (8 ½" x 10 ½")# 224210
5 Gallon Round/Square Locking (12" x 12")# 224214
5 Gallon Round/Square (12" x 12")# 224215
Safe Flow Lid™ for 1 Gallon Jugs
Lid, Suction Tube, and Strainer# 709101
Alternate Check Valve - EPDM Standard
Check Valve, Chemical, PP/Viton, 1/4"# 491315
975123
Warning! Read All Instructions Before Using Equipment!

Overview

The WR-1 Spray / Rinse System is a combination medium volume chemical spray applicator with a rinse mode. This venturi injection system uses standard city water pressure (35 - 125 PSI) to draw and blend chemical concentrate into the water stream to create an accurately diluted solution. The solution is then projected on to any surface through the discharge hose, pistol grip gun and recessed fan nozzle as a uniform spray.

Safety & Operational Precautions

  • When connecting to a potable water supply follow all local codes for backflow prevention.
  • WARNING: Severe damage to your facility, or contamination of your potable water supply, can occur without proper backflow prevention.
  • 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 safety goggles 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.
  • Never leave inlet ball valves on when unit is not in use.
  • Follow the chemical manufacturer's safe handling instructions.
  • NEVER mix chemicals without first consulting chemical manufacturer.

To Install (refer to diagram on next page)

If you are connecting to a potable water supply follow all local codes for backflow prevention.

  1. Mount the unit to a suitable surface above the chemical supply to prevent siphoning.
  2. Connect hose(s) as shown in the diagram.
  3. Flush any new plumbing of debris before connecting water.
  4. Connect water supply. Install a water filter if water piping is older or has known contaminants.

Set the chemical dilution ratio by threading one of the color coded metering tips into each chemical check valve. See chemical labels for dilution ratio recommendation or consult your chemical supplier.

  • For the strongest dilution ratio do NOT install a colored metering tip.
  • The dilution ratios in the metering tip chart are based on water thin chemicals with a viscosity of 1CPS.
  • Thicker chemicals will require a larger tip than the ratios shown in the chart.
  • Application results will ultimately determine final tip color.
  • Select the tip color that is closest to your desired chemical strength and thread it into the tip holder. DO NOT OVER-TIGHTEN.
  • Push the chemical tube over the check valve barb and place the suction tube in the chemical concentrate.
  • If necessary, cut suction tube(s) to length before attaching suction strainer.

To Operate

Always make sure the discharge is pointed in a safe direction before turning inlet valve on. Trigger can be released at any time during operation but should not be left unattended for long periods of time without closing inlet ball valve.

OPEN ONLY ONE INLET WATER BALL VALVE AT A TIME

TO SPRAY

  1. With pistol grip gun in hand and the discharge ball valve closed, open the spray ball valve.
  2. Open the discharge ball valve to begin application. 
  3. Make final metering tip adjustments based on results.
  4. When finished, close the discharge ball valve return to the unit and close the spray ball valve.
  5. Briefly open discharge ball valve to relieve pressure in the hose.

TO RINSE

  1. With pistol grip gun in hand and the discharge ball valve closed, open the rinse ball valve.
  2. Open the discharge ball valve to begin application. 
  3. When finished, close the discharge ball valve, return to the unit and close the rinse ball valve.
  4. Briefly open discharge ball valve to relieve pressure in the hose.

Metering Tip Selection

Metering Tip Color
OZ/MIN
Dilution Ratio
@ 40 PSI
SprayRinse
Brown
0.56526:1
Clear
0.88335:1
Bright Purple
1.38213:1
White
2.15137:1
Pink
2.93100:1
Corn Yellow
3.8477:1
Dark Green
4.8860:1
Orange
5.7751:1
Gray
6.0149:1
Light Green
7.0142:1
Med. Green
8.0637:1
Clear Pink
9.4331:1
Yellow Green
11.5026:1
Burgundy
11.9325:1
Pale Pink
13.8721:1
Light Blue
15.1419:1
Dark Purple
17.8816:1
Navy Blue
25.3612:1
Clear Aqua
28.6010:1
Black
50.00
No Tip Ratio Up To:7:1
The dilution ratios above are approximate values. Due to chemical viscosity, actual dilution ratios may vary.

Formula

GPM × 128 ÷ Desired Dilution Ratio = oz/min

  • See Unit Flow Rates chart for GPM
  • Use 20 for 20:1 dilution ratio, 30 for 30:1, etc.
  • Match calculated ounces per minute (oz/min) to nearest oz/min in Metering Tip Selection chart.

Unit Flow Rates

PSIGPM
SprayRinse
352.153.74
402.304.00
502.574.47
602.824.90
703.045.29
803.255.66
903.456.00
1003.646.32
1103.816.63
1203.986.93
1254.077.07
975123.jpg
Troubleshooting Guide
Problem Possible Cause / Solution
StartupMaintenance
A) Unit will not draw chemical
B) Dilution too weak
C) Dilution too strong
D) Water backing up into chemical container
1, 4, 5, 6, 7
2, 4, 5
3
8, 9, 10, 11, 12, 13
8, 9, 10, 11, 12, 13

8
Possible Cause / Solution
StartupMaintenance
  1. Inlet ball valve not completely open or both inlet valves are open
    • Completely open one inlet and the discharge ball valve.
  2. Not enough chemical - metering tip too small
    • Install larger metering tip.
  3. No metering tip installed or metering tip too large 
    • Install smaller metering tip.
  4. Chemical tube not immersed in chemical or chemical depleted 
    • Immerse tube or replenish.
  5. Discharge hose too long or wrong size or kinked
    • Straighten the hose or replace hose.
  6. Nozzle size too small (SEE REQUIREMENTS)
  7. Water pressure or water volume too low/inlet piping too small  causing poor chemical pick up
    • Increase water pressure or water volume (see requirements)
  1. Discharge valve left closed with inlet valves open - chemical check valve stuck or failed
    • Clean or replace check valve. 
    • Close inlet ball valves when not in use.
  2. Chemical strainer or metering tip partially blocked
    • Clean or replace chemical strainer and/or metering tip.
  3. Chemical tube stretched out or pin hole/cut in chemical tube
    • Cut off end of tube or replace tube.
  4. Vacuum leak in chemical pick-up connections
    • Tighten the connection.
  5. Water strainer clogged or missing/injector inlet orifice clogged
    • Clean or replace strainer; check/clean inlet orifice for obstructions. DO NOT DRILL OUT.
  6. Chemical build-up may have formed in the injector body causing poor or no chemical pick-up
    • Follow Preventive Maintenance instructions below, using hot water and/or de-scaling acid. When there is no draw at all, carefully remove fittings and soak entire injector body in de-scaling acid.
PREVENTIVE MAINTENANCE: When the unit will be out of service for extended periods, place chemical tube(s) in water and flush the chemical out of the unit to help prevent chemical from drying out and causing build-up. Periodically check and clean chemical strainer and replace if missing.