FOAMit FI-20N 20 Gallon Foam Unit

Product Information

Specifications

• Model: FI-20N
• Capacity: 20 Gallons
• Maximum Incoming Air Pressure: 100 psi (6.9 bar)

Product Usage Instructions

Safety Precautions
It is crucial to follow all safety instructions to prevent personal injury or damage. Always wear appropriate Personal Protective Equipment (PPE) as indicated in the Safety Data Sheet (SDS).

Using the Unit

1. Ensure the unit is not damaged or leaking before use.
2. Avoid pointing the discharge wand at yourself, others, or unwanted objects.
3. Do not use hydrocarbons or flammable products with the unit.

Cleaning and Maintenance

1. Depressurize and clean the unit after each use by opening the discharge ball valve.
2. Flush the unit thoroughly with fresh water when switching between alkaline and acid solutions.

Proper Servicing
Only use authorized parts listed in the manual for servicing. Do not use an air lubricator before the unit to avoid performance issues and damage. Ensure the incoming air is filtered, clean, dry, and free of moisture to prevent pump damage.

FAQ

Q: What should I do if the unit is damaged or leaking?

A: Never operate a damaged or leaking unit. It may result in exposure to chemical solutions, serious injury, or death. Contact a qualified service technician for repairs.

Q: Can I exceed the maximum incoming air pressure of 100 psi?

A: No, exceeding 100 psi may lead to pressure buildup, explosion, serious injury, or death. Always operate the unit within the specified pressure range.

Q: How should I protect myself when using the unit?

A: Always wear the appropriate Personal Protective Equipment (PPE) as indicated in the Safety Data Sheet (SDS). Protect your eyes, skin, and lungs against drifting spray.

READ ALL INSTRUCTIONS BEFORE USING OR SERVICING THIS UNIT. KEEP THIS MANUAL IN A LOCATION THAT IS READILY AVAILABLE TO USERS AND SERVICE TECHNICIANS.

Scan this code for the service manual

Safety

WARNING
PEOPLE OR OBJECTS CAN BE HURT OR DAMAGED IF THIS UNIT IS NOT USED CORRECTLY!

• Failure to read all the instructions before operating the unit may result in personal injury or death from the improper use of the chemical solution. Anyone handling, operating, or using the unit must read and understand the instructions in the manual. The buyer assumes all responsibility for safety and proper use by the instructions.

• Using or servicing the unit without appropriate personal protective equipment (PPE) may result in serious injuries such as burns, rashes, eye, throat, or lung damage, and death. Always wear PPE as indicated in the Safety Data Sheet (SDS) when using or servicing the unit. Protect eyes, skin, and lungs against drifting spray.

• Chemical solutions may pose a health risk and death if they contact the skin or eyes, and are inhaled or swallowed. Always read and follow all chemical safety precautions and handling instructions provided by the chemical manufacturer and the SDS associated with the chemical solution before using the unit.

• Pressure within the equipment may cause an unexpected release of the chemical solution and cause serious injuries such as burns, rashes, eye damage, throat or lung damage, and death. Always depressurize and clean the unit after each use. Release any remaining air pressure by opening the discharge ball valve. Never leave the unit unattended while pressurized.

• Using the unit with fluid temperatures above 100°F (37.8°C) may result in scalding, burns, serious injury, or death. DO NOT use a solution with a temperature above 100°F (37.8°C).

• Operating the unit when damaged or leaking may result in exposure to chemical solutions, serious injury, or death. Never use the unit if it is damaged or leaking.

• Never point the discharge wand at yourself, another person, or any object you do not want to be covered in chemicals.

• Using incoming air pressure exceeding 100 psi (6.9 bar) may result in pressure buildup, explosion, serious injury, or death. DO NOT exceed 100 psi (6.9 bar) incoming air pressure when operating
  the unit.

• Use of hydrocarbons and flammable products may result in explosions, fire, and serious injury or death. Never use hydrocarbons or flammable products with the unit.

• Mixing an alkaline with an acid may result in a chemical reaction. Overheating of the mixture may cause it to splatter caustic compounds or release hazardous fumes, gas, and vapors. Always flush the unit with fresh water thoroughly when switching from an alkaline to an acid or an acid to an alkaline.

NOTICE

• Servicing or modifying this unit with parts not listed in this manual may cause the unit to operate improperly. Do not use unauthorized parts when servicing the unit.
• Use of an air lubricator before the unit may result in diminished performance and damage to the unit. Do not use an air lubricator before the unit.
• Moisture in the airlines will damage the pump and diminish the pump’s life. The air must be filtered, clean, dry, and free of moisture. If needed, install an air dryer before the unit.

PROTECT THE ENVIRONMENT
Please dispose of packaging materials, old machine components, and hazardous fluids in an environmentally safe way according to local waste disposal regulations.

Service Guide

WARNING
Performing any maintenance with the unit pressurized and connected to the air supply may result in serious injury or death. Always ensure that the unit has been depressurized and disconnected from the air supply before conducting any maintenance. Servicing or modifying this unit with parts not listed in this manual may cause the unit to operate improperly. Do not use unauthorized parts when servicing the unit.

Maintaining Your Unit

To keep your unit operating properly, periodically perform the following maintenance procedures:

• Inspect the pump for wear and leaks.
• Inspect all hoses for leaks or excessive wear. Make sure all hose clamps are in good condition and properly secured.
• Replace the filter located within the air regulator as needed. Clean by unthreading the air regulator bowl from the air regulator.
• Check the suction line and strainer for debris. Clean as needed.
• Drain your air compressor tank regularly to help extend pump life. An air source with a high moisture content will accelerate pump wear.

Note:
If your air source has a high moisture content, install a water separator to the air fitting on the backplate. See Page 8 for more details. (Back plate assembly)

Servicing Your Unit

Most repairs on the unit can be performed with the following tools:

• Crescent wrench (2x)
• ⁷/16 in. (11 mm) open-ended wrench
• Flat head screwdriver
• Thread seal tape

• 2 Phillips head screwdriver

• 3 Phillips head screwdriver

• Hose cutters
• Knife

Troubleshooting Your Unit

If your unit is not operating properly, try using these troubleshooting tips:

The air regulator bowl or air filter has debris such as water, oil, or rust particles| •   Clean by unthreading the air regulator bowl from the air regulator.
The pump is cycling improperly| •   The needle valve is open too far. Close and readjust the needle valve as described in the operation section.

•   Ensure proper foaming chemicals and concentrations are being used.

Air passes through the pump without cycling| •   The pump needs to be replaced.
The solution backs up into the air regulator bowl| •   The check valve needs to be replaced.
Foam comes out wet, no matter where the needle valve is positioned| •   Check for proper air pressure on the air gauge. The air regulator is factory set at 50 psi (3.4) bar. The operating range is 40 to 80 psi (2. 8 to 5.5 bar) with

5 to 10 CFM (141.6 to 283.3 l/min).

•   The check valve may need to be replaced.

•   Verify correct chemical concentration is being used.

The unit operates at a reduced pressure| •   Check the suction line and strainer for debris or damage. Clean or replace as needed. To prevent damage to the unit, the strainer must always be used.

•   Check the air compressor supplying the unit. If the pressure is less than 40 psi (2.8 bar), turn off the unit until the compressor can catch up.

•   If the air supply is 50 psi (3.4 bar) or above, check the air gauge, which should read near 50 psi (3.4 bar). If the air gauge reads more or less than 50 psi (3.4 bar), adjust the pressure by turning the knob on the top of the

air regulator.

•   Check if the stainless steel mixing mesh is plugged. Remove and clean it by following the instructions below:

1.    Verify the unit is not plugged into an air supply and then relieve all stored pressure in the unit by turning the ball valve to the open position.

2.    Remove the discharge hose from the hose barb on the back of the unit.

3.    Open the back plate assembly and hold the stainless tee with a wrench to remove the hose barb from the tee fitting.

4.    Remove the screen and the mixing mesh from inside the tee fitting.

5.    Clean any particles from the mixing mesh and the screen. If the mixing mesh has a lot of foreign particles in it, make sure the suction strainer is still in place.

6.    Replace the mixing mesh and screen into the back of the tee. Screw the stainless hose barb back into the tee.

NOTE: It is recommended to use a pipe thread sealant when reinstalling the stainless hose barb back into the tee fitting.

Assembly Instruction

Tank Assembly

TNKA-20N-BK:
20 gallon natural tank assembly – black* lid – includes drain plug, wheels, suction valve, and backplate thumb nuts

LDA-7BK:
Lid assembly – includes 7 in. black* lid, lid flange, hinge pin, and mounting screws

TNKA-20N-BK:
20-gallon natural tank assembly – black* lid – includes drain plug, wheels, suction valve, and backplate thumb nuts

BPTNA:
Backplate thumb nut assembly – includes bolt, thumb nut, and tether

Back Plate Assembly

PA-PF34:
Plate assembly for portable foam units with ¾ in. hose – Santoprene pump

Additional plate assembly pump options:

• PA-PF34K: Kalrez pump
• PA-PF34V: Viton pump

1

| ****

A P56

| Pump with Santoprene seals – includes hose barbs, air fitting, and exhaust barb
 | ****

B P56K

| Pump with Kalrez seals – includes hose barbs, air fitting, and exhaust barb

C P56V

| Pump with Viton seals – includes hose barbs, air fitting, and exhaust barb
2| NV14| Needle valve – ¼ in. NPT – includes black knob

3

| ****

R25

| Air regulator – two ¼ in. FPT ports – two ⅛ in. FPT ports – includes filter and bowl
4| AG100| Air gauge – ⅛ in. NPT – 100 PSI dry model

5

| ****

CV38-AP

| Check valve – ⅜ in. barbs – PVC body – Hastelloy spring – Teflon ball – white
6| SSC38| Stainless screw band clamp for

⅜ in. hose

7

| ****

SST12HB38A-MX

| Stainless tee assembly – ½ in. FPT x ⅜ in. barb – includes mixing material and screen
8| STR38-IL| In-line strainer – ⅜ barb – EPDM gasket – 20 mesh SS – black bowl
9| H14BL-F| ¼ in. blue hose – hybrid TPE – available per ft.
10| H38BL-F| ⅜ in. blue hose – hybrid TPE – available per ft.

Back Plate Assembly

PA-PF34:
Plate assembly for portable foam units with ¾ in. hose – Santoprene pump

Additional plate assembly pump options:

• PA-PF34K: Kalrez pump
• PA-PF34V: Viton pump

¼ NPSM

4| AP14| Air fitting ¼ MPT x plug – nickel-plated brass
5| FW12NPT| Flat washer for 1/2 in. NPT – stainless –

0.88 in. id x 1.5 in. od x 0.05 in. thk

6| HBSS1234| Stainless hose barb ½ MPT x ¾ barb

Optional Components

WSA-20CFM:
Water separator assembly – 20 CFM – ¼ in. FPT ports – includes air plug and union fittings

Back Plate Sub-assemblies

NVA-NV14-PF:
Needle valve assembly for portable foam units – includes hose barbs and screw band clamps

⅜ in. hose

SST12HB38A-MX:
Stainless tee assembly – ½ in. FPT x ⅜ in. barb – includes mixing media and screen.

screen

Back Plate Sub-assemblies

RGA-R25-PF:
Air regulator assembly for portable foam units – includes air gauge, pump barb, hose, bulkhead fittings, and air plug

⅜ in. hose

6| H38BL-F| ⅜ in. blue hose – hybrid TPE – available per ft.
7| HBSSEL1438| Stainless hose barb ¼ MPT x ⅜ barb elbow

8

|

R25

| Air regulator – two ¼ in. FPT ports – two ⅛ in. FPT ports – includes filter and bowl
9| AG100| Air gauge – ⅛ in. NPT – 100 PSI dry model
10| SSA14BKH| Bulkhead adapter – stainless – ¼ NPT x ¼ NPSM
11| SSSFN12| Serrated flange nut – stainless – ½ in.
12| AP14| Air fitting ¼ MPT x plug – nickel-plated brass

Suction Assembly

SCTNA-PF:
Suction assembly for portable foam units – includes suction valve, hose, in- line strainer, and pump hose barb – for Santoprene pump

Additional suction assembly options:

• SCTNA-PFK: Portables with Kalrez pump
• SCTNA-PFV: Portables with Viton pump

black bowl
3| SSC38| Stainless screw band clamp for

⅜ in. hose

4| H38BL-F| ⅜ in. blue hose – hybrid TPE – available per ft.
5| HBSSEL1438| Stainless hose barb ¼ MPT x ⅜ barb elbow
6| HHPB3414| Hex head poly bushing ¾ MPT x ¼ FPT
7| BVPVC34MF| Ball valve – PVC – 3/4 NPT to 3/4 FNPT EPDM seal

Hose Assembly

HA34BL-30:
Hose assembly – 30 ft. of ¾ in. blue* hose – includes ferruled hose barb

Additional colors are available, see the datasheet for options.

AKSS34:
Stainless anti-kink spring for ¾ in. hose

Wand Assembly Options

SSWA347:
Stainless wand assembly for 3/4 in. hose – 7 in. SS wand-includes ball valve, bushing, hose barb, and screw band clamp

threaded one end only
2| HHSB1238| Hex head stainless bushing ½ MPT x

⅜ FPT

3| BVSS12| Stainless ball valve – 1/2 in. NPT
4| HBSS1234| Stainless hose barb ½ MPT x ¾ barb
5| SSC34| Stainless screw band clamp for ¾ in. hose

SSWA3410-ST:
Stainless wand assembly for 3/4 in. hose – 10 in. SS wand – includes ST80200SS spray tip, ball valve, hose barb, and screw band clamp

PWA3410-ST:
Poly wand assembly for 3/4 in. hose – 10 in. poly wand – includes ST80200SS spray tip, ball valve, connector, hose barb, and screw band clamp

10 in. long
13| SN1212| Stainless hex nipple ½ MPT x ½ MPT
14| BVSS12| Stainless ball valve – 1/2 in. NPT
15| HBSS1234| Stainless hose barb ½ MPT x ¾ barb
16| SSC34| Stainless screw band clamp for ¾ in. hose

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