Duke DWIM User Manual
SUGGESTED SPECIFICATIONS FOR VENTILATOR MODEL DWIM
Exhaust Ventilator to be SOUTHERN ENGINEERING SYSTEMS by Duke Mfg Co., model
DWIM, Type I, UL Listed, and in compliance with NFPA Bulletin 96. Ventilator shall be high velocity,
low volume, wash type and have a nominal 95% grease extraction efficiency certified by an independent
testing laboratory.
Build Canopy, front to back, as two (2) separate units. Canopy constructed of 18-gauge stainless steel
(where exposed) with bottom perimeter edges gutterless. Weld extraction chamber, plenum, and
external seams and joints to form a liquid tight construction. Polish stainless steel to a #3 finish.
Exhaust plenum Extraction Chamber to be same material as canopy, full length of section at the
back. Furnish water wash manifold consisting of a series of spray nozzles installed within chamber.
Manifold to be positioned within plenum area out of air-stream to minimize nozzle clogging. Bottom
of exhaust plenum to be formed into a pitched trough to allow laminar flow, during wash cycle, to
drain pipe connection.
Water Wash System to serve the dual purpose of daily cleaning and fire control. The wash cycle shall
be initiated when the stop/wash button on the control cabinet (required with each hood system) is
depressed. Internal cleaning will be achieved by means of 110˚ - 160˚F water mixed automatically with
injected detergent. In the event the fire control system is activated, the system shall supply a continuous
fire quenching spray. Fire quenching spray shall continue to operate until the reset button is pushed.
Pressing the start button will restart the fan system.
Install hinged, motorized Fire Damper full length at air inlet of ventilator. Damper opens when
ventilator is in normal operation, acting as an extracting baffle, and closes when ventilator is turned off
to allow thorough cleansing of extraction chamber interior. Damper automatically closes, sealing
interior of ventilator from fire when thermostat senses 325˚F.
Furnish Duct Collar, fully welded, complete with fire detection thermostat, in top of canopy within
exhaust plenum area. Duct collar size based on an average 1800 F.P.M. air velocity.
Integral Make-Up Air furnished at front of ventilator shall be SOUTHERN ENGINEERING
proprietary “Short Cycle” design. Outside shell constructed of 18-gauge stainless steel integrated with
canopy. Lower inside wall of chamber constructed of perforated 18-gauge stainless steel forming a
continuous make-up air diffuser. Diffuser to lift out using handles provided for easy access to chamber.
Make-up air chamber fitted with an interior diffuser baffle designed to provide even air distribution
across the perforated surface. Top of chamber to be fitted with a properly sized rectangular duct collar.
Make-up air duct collar provided with NFPA 96 damper and sized to permit 60% supply air.
Furnish UL listed, NSF listed, vapor proof incandescent Light Fixtures installed on 3’ to 4’ centers.
Fixtures to be completely inter-wired to a junction box and left ready for final connection to power
source. Field connections, light switch and bulbs by applicable trades.
Furnish Rod Hanger Brackets at front and center to suspend canopy from ceiling.
Canopy shall be UL Listed and NSF approved.
All equipment built in an ISO 9001:2000
approved manufacturing facility.
2305 N. Broadway
St. Louis, MO 63012
Ph 314-231-1130
Fax314-231-5074
www.dukemfg.com
BY
"Your Solutions Partner"
6/07
Exhaust Requirements Make-up Air Requirements
CFM ________________ SP (“w.g.) _____________ CFM ________________ SP (“w.g.) ________
Duct Collar ________ “x ______________” Duct Collar ________ “x _________”
Fire Protection Lighting Fixture (UL listed)
(Submit cooking equipment plan showing make Globe incandescent (100W)
and model on equipment.) Recessed incandescent (150W
Ansul Wet #R-102 Recessed fluorescent
Other ___________________________________ Light switch
Internal Piping Only NOTE: Incandescent lights are located
Complete System on approx. 4’ centers. Fluorescent
By Others fixtures are 3’ (60W) and 4’ (80W)
NOTE: Fuel shut-off devices by others (unless specified
Optional Accessories
otherwise). Enclosure paneling
(Finished ceiling higher than 9’0”)
Continuous Cold Water Mist
Design Option
VC-1C S/S Control Cabinet with push button controls
VC-1M S/S Control Cabinet with programmable Mode Commander Microprocessor
Shipping Wt. 220 lbs./Linear Ft.
COMMENTS/NOTES: _______________________________________________________________
'- "
N.F.P.A. #96 SUPPLY DAMPERS
3/8" DIA. G.I. ROD HANGERS
FURNISHED BY OTHERS
FINISHED SS PANLEING
DIFFUSER BAFFLES
1/2" INSULATION ON INTERIOR
18 GA. S.S. PERF. PANELING
WITH LIFT OFF HANDLES
FOR EASY REMOVAL
INCANDESCENT LIGHTS
(FLOURESCENT LIGHTS OPTIONAL)
BULBS NOT INCLUDED
2'-6"
6'-6" A.F.F.
"5"
9"
2'-0"
9"
VENTILATOR DRAINS
T-STATS
4"
4"4"
"
'- "
(72" MIN. STD.)
"
FIELD JOINT
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