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There are several types of intake doors to consider; bottom or side hinged (hydraulic or pneumatic) with or without interlock. The standard 15” X 18” bottom hinged, hopper style door is recommended for most chute designs. When opened, the bottom-hinged door allows for easy disposal of waste into the chute, while eliminating unnecessary spillage and overflow of litter on to the floor.


Where specified, sensor activated (WAVE) or push-button operated handicap accessible (pneumatic bottom hinged), hopper style doors; for typical trash chutes are available. This option provides easy disposal of waste into the chute eliminating the need to touch the door to open the door for disposal requirements.

The Electric Interlock feature allows for safe operation of the chute system by locking out all remaining intake doors when one door is in operation, protecting persons using the trash disposal system from falling debris from intakes above.


The side hinged door, typically recommended for linen chutes, provides a greater accessible area to deposit bundles of soiled linen.

Standard bottom hinged doors are self-closing, noiseless and fully self-latching. Both type doors are UL classified, a chute frame and door assembly with a 1½ hour fire rating and a temperature rise of 250° F (max) in thirty minutes.


There are three types of discharge outlets:

Accordion Type Damper Discharge:

The accordion discharge is recommended for use on trash chutes. The discharge is a UL labeled fire damper, held open by a 165°F fusible link and equipped with tension coils on either side of the damper to permit closing if the link

breaks. Monthly inspections of the discharge should be made to ensure that the links are intact and that no waste

has collected in the horizontal tracks, which might interfere with its closing path.


Rolling Incline Type Discharge:
The discharge door of UL construction, is held open by a 165°F fusible link. The door will roll shut if the link is melted. Monthly inspections of the discharge should be made to ensure that the link is intact and that no waste has collected in the horizontal tracks of the discharge, which might interfere with its closing path.


Hopper Type Discharge:
The hopper type discharge is UL labeled and typically used on linen chutes. The discharge is top hinged and held open by chains with a 165°F fusible link. The hopper type discharge can also extend into the discharge room from the ceiling and is supported on a pedestal(s). The hopper discharge should be kept clean and free of damage.


The purpose of a vent is to dissipate odors, as well as to dissipate hot gases in the event of a fire within the chute.


NFPA codes require a full diameter vent, penetrating and extending 3’ above the roof. CHUTES International’s full diameter vent comes complete with roof flashing, riser and metal safety cap and is of 12 gauge aluminum to better resist the external elements.


One automatic sprinkler head (required by NFPA code) is furnished as standard equipment at the top of all chutes. On rubbish chutes in particular, additional sprinkler heads should be furnished at intermediate and lower levels.

A sprinkler at the top intake, at alternate floor levels and the bottom intake for linen, trash and recycling chutes, are required. These heads are normally installed in the top corner of the intake throat to protect them from falling

material and are hidden behind a shield to prevent water from spraying out of the intake door and to prevent material that is charged into the throat from contacting the head.


These automatic sprinkler heads fuse at 165° F to open up and flood the chute. When the fire is out, the fused heads must be replaced. The automatic sprinkler heads furnished with the chute should be piped in accordance with NFPA standards.


Internal facility chutes should be flushed periodically to keep them clean. A flushing spray head is furnished at the top of each chute as standard equipment. When supplied with water (hook-up by others), the head radiates a flow of water to the inner chute wall. The water will tend to channel when first started but will spread out as cleaning occurs. How often and how long the chute should be flushed depends upon many variables such as chute usage, size, condition, water temperature and pressure.




A disinfecting and sanitizing unit is sometimes requested for trash, linen and/or recycling chutes to control odor and bacteria (hook-up by others). The unit is comprised of a reservoir tank and proportioning valve which is located above the top intake of a chute. It injects a disinfecting solution into the water flow from the flushing spray head system.




The Access Door (installed by others), located above the top intake of the chute, allows access to the valves that operate the flushing spray head and/or sanitizing unit. The access door is 15” X 15”, side hinged, constructed of stainless steel, and is classified for a UL 1½ hour fire rating and a maximum temperature rise of 250º F 30 minute label.


Electric Interlock doors are designed to lock out all other intake doors on a chute when one door is opened. When chute is in use, all other chute doors will remain locked with a light showing another door is in use. Maintenance personnel, by means of a key switch at the power supply control box, have the ability to lock out the intake doors

when servicing the equipment. This will close all doors when the discharge container is

out of position or while maintenance is being performed in the discharge area.

Electrical Interlock system comes standard with service switch which will disable the interlock feature.

The interlock system is pre-wired and is designed to be plugged into a 120V receptacle and stepped down to 24VDC located in the power supply box. (120V receptacle supplied by others).


Pneumatic standard and interlock intake doors are designed for ease of operation. Pneumatic doors are controlled by a green push button, which will automatically open the intake door for 7-10 seconds to allow for the disposal of trash into the chute system.


The optional pneumatic interlock feature will function similar to the electric interlock. When the chute is in use; all other chute doors will remain locked and a red indicator light on the top panel will signify chute in use. This will allow for the safe operation of the chute system by protecting persons from falling debris from above.


Pneumatic doors are powered by an air compressor, regulator and dump valve, located in the discharge area. The pneumatic doors can be locked out for routine maintenance by manually turning off the dump valve to release all air from the system. The Pneumatic system is pre-wired with 1/8” supply hoses and is designed to be plugged into an oil-free air compressor (120V receptacle source for air compressor supplied by others). The regulator is recommended to be set between 90-100PSI for continuous operation.


The heat sensor option can be installed on both electric and pneumatic interlock systems. This safety feature will shut the chute system down in the event of a fire emergency. The heat sensor on the electrical interlock will shut down the power source at the control box, which will prohibit intake doors from being opened.

The heat sensor on the pneumatic interlock will automatically dump all air from the chute system disabling chute intake door operation.

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