Twin-Line Pre-mix Doorway Foam Unit

Service Manual

Model: DS-WL-TL

Important Information

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

Language: English (Original Instructions)

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Safety

⚠ WARNING

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

Notice

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. [Recycle Symbol Placeholder]

Service Guide

⚠ WARNING

Performing any maintenance with the unit turned ON, plugged into an electrical power source and connected to the air supply may cause serious injury or death. Always ensure that the unit has been turned OFF, unplugged from the electrical power source, and disconnected from the air supply before conducting any maintenance.

Servicing, or modification, of 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:

Note: If your air source has a high moisture content, install a water separator (sold separately) before the unit.

Servicing Your Unit

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

Troubleshooting Your Unit

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

Issue Solution
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.
Pump is cycling improperly due to lack of air pressure
  • The needle valve is open too far. Close and readjust the needle valve as described in the operation section.
  • Ensure proper foaming chemical is being used.
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). Operating range is 40 to 80 psi (2.8 to 5.5 bar) with 3.5 to 8 CFM (99.1 to 226.5 l/min).
  • The check valve may need to be replaced.
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 the unit off 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.

Control Box Assembly

DS-WL-TL-CB: Control Box Assembly

Control box assembly for pre-mix twin line doorway foam unit with 24VDC timer - Santoprene pump.

Additional control box pump options:

Inside view:

Item number Description
1Wall mount screw - #14 x 1 1/4 in. - Stainless steel - hex head slotted
2Poly box foot - gray polypropylene
3Wall mount screw anchor - #14 x 1 1/4 in. - plastic - 5/16 in. drill size
4Screw - #10 x 3/4 in. - stainless steel flat head Phillips - hi-lo thread
5Poly box assembly - 16 in. x 13 in. x 8 in. - gray polypropylene - includes mounting hardware
6A P56: Pump with Santoprene seals - includes hose barbs, air fitting, and exhaust barb
B P56K: Pump with Kalrez seals
C P56V: Pump with Viton seals
7Timer assembly - repeat cycle - 24VDC - 5A resettable circuit protector - includes 120VAC NA power cord
8Toggle switch - body - single pole single throw - nickel-plated brass - 1/4 in. spade terminals - 1/2 in. mounting hole - 15/32-32 keyed threaded bushing
9Toggle switch - mounting boot - black silicone rubber - 15/32-32 integrated nut
103/8 in. id blue hose - hybrid TPE - available per ft.
11Check valve - 3/8 in. barbs- PVC body- Hastelloy spring - Teflon ball - white
121/4 in. id blue hose - hybrid TPE - available per ft.
13Screw band clamp - stainless steel - for 3/8 in. hose
14Needle valve - 1/4 in. NPT - includes black knob
15Regulator - air - 2x 1/4 in. FPT and 2x 1/8 in. FPT ports with bowl and filter - no gauge
16Air gauge - 1/8 in NPT - 0-100 PSI markings - dry model
17Quick fit - 1/2 MPT x 1/2 od tube-polypropylene
18Hose barb - polypropylene - 1/2 in. FPT x 3/8 in. barb

Diagram Description: An internal view of the control box shows various components connected by hoses and wires. Numbered labels point to specific parts like screws, feet, anchors, pumps, timer, toggle switches, hoses, check valves, regulators, and gauges.

Control Box Sub-assemblies

RGA-R25-WF-ACV-24VDC-RH: Air Regulator Assembly

Air regulator assembly for wall mounted foam units - includes air gauge, needle valve, 24VDC valve, air inlet valve, screw band clamp, and hose barb - for use on right hand side of box.

Item number Description
13/8 in. id blue hose - hybrid TPE - available per ft.
2Screw band clamp - stainless steel - for 3/8 in. hose
3Hose barb - stainless steel - elbow - 1/4 in. MPT x 3/8 in. barb
41/4 in. hose barb - brass - for G57/P56 air fitting with o-ring
5Ear clamp - Oetiker - stainless steel for 1/4 in. hose
61/4 in. id blue hose - hybrid TPE - available per ft.
7Black knob for needle valve
8Needle valve - 1/4 in. NPT - includes black knob
9Stainless hex nipple 1/4 MPT x 1/4 MPT
10Stainless hose barb 1/8 MPT x 1/4 barb elbow
11Air gauge - 1/8 in. NPT - 100 PSI dry model
12Regulator - air - 2x 1/4 in. FPT and 2x 1/8 in. FPT ports with bowl and filter - no gauge
13Air control valve - MAC - 1/4 in. FPT in. - 2x 1/4 in. FPT out - aluminum body - 24VDC solenoid - normally closed - 18 in. 18 AWG flying leads
14Bulkhead adapter - stainless - 1/4 NPT x 1/4 NPSM
15Serrated flange nut - stainless - 1/2 in.
16Ball valve - brass - nickel plated - air inlet valve - 1/4 in. FPT x 1/4 in. FPT
17Hose barb - stainless steel - 1/4 in. MPT x 3/8 in. barb

Diagram Description: An external view of a control box sub-assembly, showing an air regulator setup. Numbered labels point to hoses, clamps, barbs, a needle valve, air gauge, regulator, air control valve, bulkhead adapter, flange nut, and ball valve.

SCTNA-WL-HA38BL-8-NB: Suction Hose Assembly

Suction hose assembly - includes 8 ft. of 3/8 in. blue* weighted hose and foot valve - no hose barb.

Item number Description
13/8 in. id blue* hose - hybrid TPE - available per ft.
2Suction hose weight - 15/16 in. id x 1 1/2 in. od x 3 1/4 in. long - PVC coated stainless
3Screw band clamp - stainless steel - for 3/8 in. hose
41/4 in. MPT x 3/8 in. hose barb - plastic
540 mesh suction line strainer 1/4 FNPT

* Additional colors available, see datasheet for options.

Diagram Description: A diagram of the suction hose assembly. Numbered labels point to the hose, a weighted foot valve assembly with a strainer, and a hose barb.

Nozzle Assembly

NZA-DS-TL-1: Nozzle Assembly

Adjustable doorway foam nozzle assembly for twin line units with one nozzle installation - includes mounting hardware, 50 ft. tubing, and ST80200SS fan tip.

Additional nozzle assembly options*:

Item number Description
11/2 in. od natural tube - polyethylene - available per ft.
2Quick fit - 1/2 MPT x 1/2 od tube - polypropylene
3Stainless tee 1/2 FPT
4Stainless hex nipple 1/2 MPT x 1/2 MPT
5Hex head stainless bushing 1-1/4 MPT x 1/2 FPT
61 1/4 in. FNPT and 1 1/4 in. FNPT foam tube - polished stainless - 9 1/2 in. long
7Mixing assembly - doorway system twin line discharge - includes stainless steel mixing media and screen
81/2 check valve 7 lb - Hastelloy spring - Viton seals
9Stainless street elbow - 304 stainless steel - 1/2 in. FPT x 1/2 in. MPT
10Wall mount screw anchor - #14 x 1 1/4 in. - plastic - 5/16 in. drill size
11Bracket - stainless steel - for mounting 1 1/4 in. discharge wand
12Wall mount screw - #14 x 1 1/4 in. - stainless steel - hex head slotted
13Nozzle mount body - 1/2 in. MPT - black and gray polypropylene - accepts nozzle mount ball
14Nozzle mount ball - 1/2 in. FPT - black polypropylene - for nozzle mount body
15A ST80200SS: Spray tip - 80 degree - 20.0 GPM - stainless - 1/2 MPT
B ST80100SS: Spray tip - 80 degree - 10.0 GPM - stainless - 1/2 MPT
C ST8060-12SS: Spray tip - 80 degree - 6.0 GPM - stainless - 1/2 MPT

*Note: Spray tip size varies based on number of nozzles used - refer to Operation Manual for more information.

Diagram Description: An exploded view of the nozzle assembly, showing various fittings, hoses, a mixing assembly, check valve, elbows, mounting hardware, and spray tips. Numbered labels identify each component.

Models: DS-WL-TL Twin Line Pre Mix Doorway Foam Unit, DS-WL-TL, Twin Line Pre Mix Doorway Foam Unit, Pre Mix Doorway Foam Unit, Doorway Foam Unit, Foam Unit

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