Berner DTU03-1026 Installation Manual
IMPORTANT INSTRUCTIONS
READ AND SAVE
THESE INSTRUCTIONS
No. II-450
Saving energy and creating healthy, comfortable environments
Date July, 2015
DRIVE-THRU
UNIT 3
AIR CURTAIN SERIES DTU03
for outdoor use
unheated only
Your new Drive-Thru air curtain(air door), properly installed, maintained and operated,
will keep fumes out of your restaurant, increase employee comfort, and save energy.
Installation & Maintenance Instructions
TABLE OF CONTENTS
I. UNCRATING.................................................................................................................................................................................... 2
II. MOUNTING INSTRUCTIONS ....................................................................................................................................................... 2
III. WALL MOUNTING ....................................................................................................................................................................... 3
IV. ELECTRICAL CONNECTIONS ..................................................................................................................................................... 4
V. OPERATION INSTRUCTIONS .......................................................................................................................................................4
VI. MAINTENANCE AND CLEANING .............................................................................................................................................4
VII. SERVICE .......................................................................................................................................................................................5
VIII. WARRANTY ................................................................................................................................................................................6
WARNING: TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK OR INJURY TO PERSONS, OBSERVE THE FOLLOWING:
A. Read all instructions before installing or using this air curtain.
B. Use this unit only in the manner intended by the manufacturer and described in this manual. Any other use not recommended by the
manufacturer may cause re, electric shock, or injury to persons. If you have any questions, contact the manufacturer.
C. 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.
D. Installation work and electrical wiring must be done by qualied person(s) in accordance with all applicable national and local codes
having jurisdiction, including re-rated construction. See page 4, ELECTRICAL CONNECTIONS (NEC Code ANSI/NFPA No. 70).
E. When cutting or drilling into wall or ceiling, do not damage electrical wiring and other hidden utilities.
F. To reduce the risk of re, do not store or use gasoline or other ammable vapors and liquids in the vicinity of the air curtain.
G. This air curtain is hot when in use. To avoid burns, do not let bare skin touch hot surfaces. Keep combustible materials, such as furniture,
pillows, bedding, papers, clothes, etc. and curtains at least 1 inch from the top, back, front, sides and at least 6 feet from the discharge of
the air curtain.
H. Extreme caution is necessary when any air curtain is used by or near children or invalids, and whenever the heater is left operating
unattended.
I. Do not operate any air curtain after it malfunctions. Disconnect power at the service panel and have the air curtain inspected by a
reputable electrician before reusing.
J. To disconnect the air curtain, turn controls to “o”, and turn o power to the air curtain circuit at main disconnect panel.
K. Do not insert or allow foreign objects to enter any ventilation or discharge opening as this may cause an electric shock or re, or damage
the air curtain.
L. To prevent a possible re, do not block the air intake or discharge of the air curtain in any manner.
M. The air curtain has hot and arcing or sparking parts inside. Do not use it in areas where gasoline, paint, or ammable vapors or liquids are
used or stored.
N. This heater may include an audible or visual alarm to warn that parts of the heater are getting excessively hot. If the alarm sounds (or
illuminates), immediately turn the heater o and inspect for any objects on or adjacent to the heater that may have blocked the airow or
otherwise caused high temperatures to have occurred. DO NOT OPERATE THE HEATER WITH THE ALARM SOUNDING (OR ILLUMINATING).
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 Unit 3 air curtain is designed to be an eec-
tive 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 curtain will not perform properly if negative air
pressure 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
DTU03-1018 11 12
DTU03-1026 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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