Unified Brands VENTILATION SYSTEMS manual

integral water wash system cleans the inside of the grease extraction chamber either by manual activation of the Wash Start button or by a programmable timer. The duration of the wash is electrically controlled. The wash system is also activated by an electrical thermostat or a manual switch in the event of a fire condition. A surface fire extinguishing system is required and may be factory supplied.

Auto Wash control panels are provided with these systems. Wiring diagrams are provided with this manual.

Installation shall be in accordance with NFPA 96.

D.Airflow Requirements

Minimum exhaust airflow requirements and maximum make-up airflow requirements [where air is introduced directly inside the canopy] are shown on the chart below. These flow rates were established under laboratory conditions. Greater exhaust airflows and/or reduced make-up airflows may be required for complete capture.

	CFM REQUIREMENTS
400°F Cooking		600°F Cooking	700°F Cooking
Model No. Surface Equip.		Surface Equip.	Surface Equip.
AFWO,AFBO	200	300	525
AFDO,AFWP
AFBP,AFDP
AFWE,AFDE
AFBE
AFWI,AFBI	250[175]	N/R	N/R
AFDI,AFWD
AFBD,AFDD
AFIO,AFIP	250	400	600
AFIE
AFII,AFID	300[150]	N/R	N/R
AXWO,AXBO	200	275	525
AXDO,AXWP
AXBP,AXDP
AXWE,AXDE
AXBE
AXWI,AXBI	250[175]	N/R	N/R
AXDI,AXWD
AXBD,AXDD
AXIO,AXIP	250	400	600
AXII	300[150]	N/R	N/R
AWWO,AWWP	194	270	*525
AWWE,AWDO
AWDP,AWDE
AWBO,AWBP
AWBE
AWWI,AWBI	250[190]	270[146]	N/R
AWDI,AWWD
AWBD,AWDD
AWTE,AWTP	400	420	N/R
AWTO

N/R = Not Recommended

*=Manufacturer's test results not yet submitted to U.L. for capture tests.

E.Fire Extinguishing Systems

There are two basic types of ventilator fire extinguishing systems in use today:

Wet Chemical and Water Mist. Wet Chemical Systems may be all or partially factory installed [by the Fire System Manufacturer]; final hook up and certification at job site is done by the Fire System Manufacturer's local representative. These systems must be periodially inspected, and critical parts replaced. It is suggested that a service contract be purchased from the local representative. For further details refer to the manufacturer's technical manual.

AVTEC manufactures and installs a water mist fire extinguishing system, "MIST-A-FIRE", that connects to the building fire sprinkler system [must be "wet" type system]. Final connect of this system must be done in the field by the sprinkler

contractor or authorized plumber. A certification/inspection report is done by an authorized AVTEC representative. Periodic inspection is generally required, but replacement of parts and periodic maintenance is virtually eliminated. For further details, refer to the AVTEC MIST-A-FIRE Installation and Operating Technical Manual.

II. INSTALLING THE VENTILATOR

The ventilator is supplied with brackets to facilitate the attachment of hanger rods to the vent. Hanger rods should be attached to all brackets to ensure proper support.

A.Ascertain that the ceiling/roof structure is strong enough to support the weight of the hood and support system. The approximate weight of the hood is shown below:

45 lbs/linear ft. for hoods w/o AMU plenums.

55 lbs/linear ft. for hoods w/AMU plenums.

125 lbs for fire control cabinet.

B.Carefully uncrate the hood so as not to dent or scratch the outer surface.

C.Position the hood on the floor in approximately its final installed location.

D.Use 1/2" threaded rods to hang the hood. The hanger rods should be approximately 1/2" closer to the wall at the structural attachment location than at the top of the hood. [see fig. #4] This ensures that the hood is held tightly against the wall.

Note! Do not remove Support Brace until Ventilator installation is complete. Upon completion of installation, dispose of Support Brace and replace the Acorn Nuts to their original locations.