Installation Instructions
1
WARNING
TO  REDUCE  THE  RISK  OF  FIRE,  ELECTRIC 
SHOCK,  OR  INJURY  TO  PERSONS,  OBSERVE 
THE FOLLOWING:
1. Use this unit only in the manner intended by the
manufacturer. If you have questions, contact the 
manufacturer or your distributor.
2. Before servicing or cleaning unit, switch power off 
at service panel and lock the service disconnect-
ing means to prevent power from being switched 
on accidentally. When the service disconnecting 
means cannot be locked, securely fasten a promi-
nent warning device, such as a tag, to the service 
panel.
3. Installation work and electrical wiring must be done
by a qualified person(s) in accordance with all ap-
plicable codes and standards, including fire-rated 
construction codes and standards.
4. Sufficient air is needed for proper combustion and
exhausting of gases through the flue (chimney) of 
fuel burning equipment to prevent backdrafting. Fol-
low the heating equipment manufacturer's guideline 
and safety standards such as those published by 
the National Fire Protection Association (NFPA), 
and the American Society for Heating, Refrigera-
tion and Air Conditioning Engineers (ASHRAE), 
and the local code authorities.
WARNING
CAUTION
1. For general ventilating use only.  Do  not  use  to
exhaust  hazardous  or  explosive  material  and
vapors.
2. To avoid motor bearing damage and noisy and/or
unbalanced  impellers,  keep  drywall  spray,  con-
struction dust, etc. off power unit.
3. Please  read  specification  label  on  product  for
further information and requirements.
4. Electrical circuit, including speed control, (if used),
must be rated 6 AMPS minimum.
Blower Dimensions
28.25 x 24.75 x 7.17
PLAN THE INSTALLATION
1. Locate  the  ventilator  so  the  length  of  the  duct
run and number of elbows needed are kept to a
minimum.
2. Where  possible,  ventilator  should  be  centered
between wall studs or roof rafters.
3. Avoid pipes, wires, or other ductwork that may be
running through the wall.
ALL INSTALLATIONS
MODEL  VOLTS  AMPS  CFM  DUCT SIZE
DEV900  120  5.7  900  10 " DIA.
SPECIFICATIONS
INSTALLER: Leave This Manual With The Homeowner
HOMEOWNER: Use And Care Information On Page 4
5. When cutting or drilling into wall, or ceiling, do not
damage electrical wiring or other hidden utilities.
6. Ducted fans must always be vented to the out-
doors.
7. To reduce risk of fire, use only metal ductwork.
8. This unit must be grounded.
READ AND SAVE THESE INSTRUCTIONS
VIKING MODEL DEV900
EXTERIOR MOUNTED VENTILATOR
FOR USE WITH VCWH, VICH, DBCV, DICV, DCWH, DCWL, DCWN, DTWS AND 
DCIH :-/-2+RANGE00' HOODS. 30" TO 42" WIDE, 9" TO 18" HIGH.










