Berner DTU1026 Instructions Manual
READ AND SAVE
THESE INSTRUCTIONS
No. II-450
Date January, 2009
DRIVE-THRU UNIT
www.berner.com
800-343-7991
AIR DOOR
MADE IN THE USA
Installation & Maintenance Instructions
TABLE OF CONTENTS
I. UNCRATING.................................................................................................................................................................. 2
II. MOUNTING INSTRUCTIONS ..................................................................................................................................... 2
III. WALL MOUNTING ..................................................................................................................................................... 3
IV. ELECTRICAL CONNECTIONS .....................................................................................................................................4
V. OPERATION AND CONTROLS .................................................................................................................................. 4
VI. AIRFLOW ADJUSTMENTS ......................................................................................................................................... 4
VII. MAINTENANCE AND CLEANING .............................................................................................................................4
VIII. SERVICE ..................................................................................................................................................................... 5
Your new Drive-Thru air door (sometimes referred to as an air curtain) , properly installed, maintained
and operated, will keep fumes out of your restaurant, increase employee comfort, and save energy.
WARNING: TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK OR INJURY TO PERSONS, OBSERVE THE FOLLOWING:
A. Use this unit only in the manner intended by the manufacturer. If you have any questions, contact the manufacturer.
B. Before servicing or cleaning unit, switch power o at service panel and lock the service disconnecting means to prevent power from being
switched on accidentally. When the service disconnecting means cannot be locked, securely fasten a prominent warning device, such as a
tag, to the service panel.
C. Installation work and electrical wiring must be done by qualied person(s) in accordance with all applicable codes and standards, including
re-rated construction.
D. Sucient air is needed for proper combustion and exhausting of gases through the ue (chimney) of fuel burning equipment to prevent
back drafting. Follow 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, Refrigeration and Air Conditioning Engineers (ASHRAE), and local
code authorities.
E. When cutting or drilling into wall or ceiling, do not damage electrical wiring and other hidden utilities.
I. UNCRATING
Carefully examine the carton(s) for damage before opening. If
the carton is damaged, immediately notify shipping company.
If the unit(s) were shipped on wooden skids, remove protective wood and banding straps securing the carton(s) to the
skid. Open the carton(s) and remove all protective packaging.
Immediately verify that the electrical rating nameplate located
on the cover matches electrical power supply available. Retain
the shipping carton(s) until the unit(s) is installed and properly
operating.
ACCESSORIES: If the unit(s) was ordered with optional electrical accessories, the accessories may be found in the carton
containing the unit or in a separate carton(s) accompanying
the unit(s). Check all of the cartons/skids for accessories before
discarding.
II. MOUNTING INSTRUCTIONS
(General Notes for All Mounting Congurations)
INDOOR MOUNTING ONLY!
Environmental/Insect/Dust & Fume Control
The Drive-Thru air door is designed to be an eective barrier
against cold drafts in the winter and hot air in the summer. To
achieve optimum protection, the unit should be mounted on
the inside of the building, as close to the top of the window
opening as possible. To ensure peak performance, keep the
air stream free of obstructions. The unit is equipped with
mounting brackets to ensure proper mounting in most applications.
A. When determining the mounting location for the unit(s), make
sure that nothing interferes with the curtain of air developed
when the discharge vanes are directed from 0º to 20º toward
the drive-thru window opening. If the air stream strikes any
obstruction (the top edge of the window, a window opening device, etc.), the eectiveness of the unit will be greatly
reduced (See Drawing 1).
AIR
Discharge
Nozzle
18” minimum
Air
Air
Exterior
Interior
The air door will not perform properly if negative air pres-
sure exists in the building. Under these conditions, a means
for makeup air to the building must be provided so that the
air pressure on both sides of the opening is in balance.
Before mounting the unit, check the supporting structure to
verify that it has sucient load-carrying capacity to support
the weight of the unit(s). The mounting hardware should be
capable of supporting a minimum of three (3) times the weight
of the unit (See Table 1).
MODEL
DTU1018 11 12
DTU1026 16 17
TABLE 1
NET WEIGHT
AMBIENT (lbs)
NET WEIGHT
ELECTRIC (lbs)
DRAWING 1
B. For optimum performance, the bottom of the unit (discharge
nozzle) should be no more than 1” above the top of the
drive-thru window opening with the unit mounted ush to the
wall. If the unit must be mounted higher, it must be spaced
out from the wall 3/8” for every inch the unit is above the
drive-thru window opening.
C. Electric heated units shall:
1. Have a minimum clearance of at least 1” between the sides
and top of the unit and any combustible material.
2. Have a minimum clearance of at least 18” between the bottom of the unit and the counter.
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