Mars Air BD-14-96 Installation Manual

Document No: BD-IOM
Date: 1214

WINDGUARD BELT DRIVE (BD) INDUSTRIAL SERIES

Installation, Operation and Maintenance Manual

Please read and save these instructions. Read carefully before attempting to assemble, install, operate or
maintain the product described. Protect yourself and others by observing all safety information. Failure to
comply with these instructions could result in personal injury and/or property damage. Retain these instructions
for future reference.

OVERVIEW

Mars Air Curtains are
designed to cover
door openings,
providing both
temperature
control/environmental
separation and flying
insect control when
the building’s doors
are opened. Typical
installation heights
are: BD-14 Series
(14’), BD-18 Series
(18’), BD-22 Series (22’), BD-26 Series (26’) and
BD-30 Series (30’). The units are typically
overhead mounted horizontally above the door
opening. They can also be vertically mounted
alongside the opening. Heated units must be
mounted on the inside or the protected side of the
opening. The motors used in the BD Series range
from 5 HP to 30 HP (see submittal for details).

All the BD Series come standard with an
expanded metal air intake grille(s). The BD Series
can be configured with Flat Bank or V-Bank
Sections, as options.

GENERAL SAFETY INFORMATION
Use this product only in the manner intended by

the manufacturer. If you have any questions,
contact the manufacturer. Only qualified
personnel should install this product. Installing
personnel should have a clear understanding of
these instructions and should be aware of
general safety precautions. Improper
installation can result in electric shock, possible

WARNING

To reduce the risk of fire, electric shock or injury to
persons, observe the following.
A. Always disconnect, lock and tag power source

before installing or servicing product.

B. Installation work or electrical wiring must be done by

qualified person(s) in accordance with all applicable
codes and standards, including fire-rated
construction.

C. The combustion airflow needed for safe operation of

fuel burning equipment in the area may be affected
by the product’s operation. Follow the heating
equipment manufacturer’s guideline and safety
standards, such as those published by the National
Fire Protection Agency (NFPA), the American
Society of Heating, Refrigeration and Air
Conditioning Engineers (ASHRAE) and local code
authorities.

D. When cutting or drilling into a wall or ceiling, be

careful not to damage electrical wiring and other
hidden utilities.

WARNING

Precaution should be taken in explosive atmospheres.

injury due to
coming in
contact with
moving parts,
as well as
other potential
hazards.

WARNING

When servicing the product, motor may be hot
enough to cause pain or injury. Allow motor to cool
before servicing.

RECEIVING AND INSPECTION

Upon receiving the product, check to make s ure all
items are accounted for by referencing the Bill of
Lading to ensure all items were received. Inspect
each carton for shipping damage before accepting
delivery. Notify the freight carrier if any damage is
noticed. The carrier will make notification on the
delivery receipt acknowledging any damage to the
product. All damage should be note d on all copies
of the Bill of Lading which is countersigned b y the
delivering carrier. A Carrier Inspection Report
should be filled out by the carrier upon arrival
and a report given to the Traffic Department. If
damaged upon arrival, file a claim immed iately with
the carrier. Any physical damage to the unit after
acceptance is not the responsibility of Mars Air
Systems.

UNPACKING

Verify that all parts, components and accessories,
and the correct quantities of each have been
received. If any items are missing, report
shortages to Mars Air Systems directly to arrange
for obtaining the missing items. Again, verify
quantities received against those on the Bill of
Lading only, as multiple shipments may be
involved.

INSTALLATION

Typical Mounting – Wall or Ceiling Mounted
Horizontally Above the Door Opening

1. Overhead installation is recommended to
prevent the possibility of the unit falling if the
wall to which the unit is mounted is hit by a
truck or material handling device. If however,
wall or bracket mounting is preferre d, additional
holes may be drilled in the side panels of the
housing.

Note: Bracket/Support mounting is not
generally recommended for Air Curtains
equipped with steam or hot water coils.
Overhead installation using threaded rods with
independent suspension of coils is
recommended.

2. Center the unit over the opening. The air
curtain shall be equal to or greater than the
width of the opening.

3. Four pre-punched 1/2” mounting holes on the
top of the unit are provided for your
convenience. These holes must be utilized to
secure the product overhead. All hardware is
field provided by others.

4. Mount the product such that the discharge is 1”
above the opening and all obstacles . (FIG. 1)

Note: If the product is installed higher than the
recommended 1” above the opening, then it
must be moved 3/8” away from the wall for
every 1” that it is moved up. Any void between
the wall and the product must be sealed, by
others, to optimize performance.

FIG. 1

5. Use four (4) threaded rods for overhead
installation or four (4) threaded bolts for wall
installation. All hardware is field provided by
others. (FIG. 1)

6. If applicable, for tandem instal lation or products
mounted side by side, allow no more than 6”
between the two products. For overhead
installation using threaded rods, the products
may require a beam, by others, to span the full
distance of the mounting length. (Reference
Accessory Installation Supplement)

7. All wires must be connected to the external
junction box(s) of the unit.

8. The unit must be wired per NEC and local
codes.

Electrical Field Wiring

The unit and any optional accessories must be
wired with the proper voltage to the junction box
per the wiring diagram. (FIG. 2, unheated products
only)

D. Check all field wired components “if supplied” are

wired correctly.

E. Check that the inlet air supply and the discharge air

supply are free of obstructions.

F. Check that all air filter(s) and/or air intake grille(s) are

in place and installed properly, as originally shipped.

G. Verify voltage to the product once more a nd turn

power on.

H. Regardless of whether the product is mounted on the

inside or outside of the door opening, set the air
directional vanes in the discharge nozzle slightly
outward to approximately 10-15° towards the
outside, or the wind load. (FIG. 3).

FIG. 2

NOTE

For accessory installation, reference Accessory
Installation Supplement.

For heated products, reference Heated Products

Supplement.

START-UP

This product has been assembled and tested at the
factory prior to shipping. The following procedures
should be performed to assure its performance.
Before continuing with the start-up, it is important to
recognize the safety controls furnished with the unit.

WARNING

Prevent hazard of electrical shock. More than one
disconnect switch may be required to de-energize this
product.

WARNING

The following items must all be completed by a
qualified installer and checked off when completed

A. Re-check that the product has been installed

properly and is level and secure.

B. Check all terminal screws are tight and field wiring

is connected in accordance to National Electrical
Code and wired per the enclosed wiring diagram.
For electric heated models, ensure that the coils
are secured and not touching each other on any
metal surface.

C. Verify proper voltage prior to powering the

product. (See product label for reference).

FIG. 3

I. For products with control panels, turn the HOA

(Hand-On-Auto) selector switch to “On” position and
open the door to energize the product. For products
without a control panel or an On/Off switch, open the
door to energize the product.

J. If heated products are installed, reference Heated

Products Supplement.

K. For three phase units, verify direction of rotation of

blower wheels (note direction arrows on the blower
wheel housing). Correct if needed by changing
polarity of three phase power.

L. VERY IMPORTANT Using a clamp meter, measure

the amperage to each motor and ensure that they do
not exceed the amperage listed on the product label.

M. If applicable, adjust the air intake grille(s) such that

the output air stream reaches the floor. For
temperature control and environmental separation
applications, the air stream should reach the floor
with sufficient strength to create an air seal around
the door opening without creating turbulent mixing of
the inside and outside air. For flying insect control
applications, the air stream should reach the floor
with maximum strength. If after proper installation
and adjustment, the product appears to be producing
too little or too much air for the application, contact
the manufacturer.

MAINTENANCE

WARNING

To reduce the risk of fire, electrical shock or injury to
persons, observe the following:
A. Maintenance is to be performed only by qualified

personnel who are familiar with local codes and
regulations and are experienced with this type of
product.

B. Before servicing or cleaning the product switch

power off at service panel and lock service panel to
prevent power from being switched “ON”
accidentally.

Routine maintenance is required to keep this product
operating at its peak performance and efficiency.
Over time, the housing, air intake grille, air intake
filter, blower wheels and motor(s) will accumulate a
build up of dust, debris and other residue. It is
imperative to keep these components clean. Failure
to do so will not only lower operational efficiency and
performance, but also reduce the useful life of the
product. The time between cleanings depends on the
application, location and daily hours of use. On
average, under normal use conditions, the product
should require a thorough cleaning once every six (6)
months.

To clean the product, perform the following:

1. Verify the product has been disconnected from the
power source.

2. Use a damp cloth and either a warm mild soapy
water solution or bio-degradable degreaser, to wipe
down the exterior components of the housing.

3. To access the interior of the product, remove the air
intake grille(s) and/or air intake filter(s). This is
accomplished by removing the screws on the face of
the air intake grille(s)/filter(s) or top access panels.

4. Thoroughly clean the air intake grille(s)/filter(s) or top
access panels.

5. Thoroughly wipe down the motor, blower wheels and
blower wheel housings. Be careful not to spray the
motor with a water hose.

6. The motor(s) require no additional lubrication. They
are permanently lubricated and feature double
sealed ball bearings.

7. To re-install the product, reverse the procedures
above.

8. Reconnect the power source to the product.

9. If you have any questions regarding the maintenance
of the product, contact the manufacturer.

DISCLAIMER

Mars reserves the right to change specifications and
product design without notice. Such revisions do not
entitle the buyer to corresponding changes,
improvements, additions or replacements for
previously purchased equipment.

TROUBLESHOOTING

PROBLEM CAUSE SOLUTION

NO AIR BLOWING
OUT OF DISCHARGE
NOZZLE

- Circuit breaker is tripped - Reset circuit breaker

- Blown fuses on power supply - Replace fuses

- Motor overload is open or tripped

- Failed switch - Replace or repair limit switch
MOTOR IS RUNNING
BUT FANS ARE NOT
SPINNING

- Loose set screws on wheel hubs - Tighten set screws on motor shaft flats

- Fan spinning inside fan housing - Tighten fan on shaft or replace fan

- Broken fan hub - Replace fan wheels
ELECTRICAL
CONTROLS NOT
WORKING WHEN
DOOR IS OPEN

- Door limit switch is not operating - Repair or replace door limit switch
UNIT WILL NOT TURN

OFF
LOW AIR FLOW

- Obstruction on intake or discharge - Remove obstruction or move air curtain

- Power leads out of polarity

- Fan rubbing against housing - Free fan from housing

- Blower wheels clogged with dirt - Clean and remove dirt from blower wheels
EXCESSIVE AIR
VELOCITY AT DOOR
OPENING

- Air temperature too cold - Add auxiliary heat to overcome wind chill

AIR NOT HITTING
THE FLOOR

- Obstruction in the direction of air flow

- Negative building pressure
UNEVEN AIR - Shaft rotating inside fan - Replace fan or tighten fan on shaft

- One motor not functioning - Replace or repair motor
EXCESSIVE NOISE
AND OR VIBRATION

- Loose set screws on wheel hubs - Tighten set screws on motor shaft flats

- Fan spinning inside fan housing - Tighten fan on shaft or replace fan

- Broken fan hub - Replace fan wheels

- Bearing end caps worn - Replace Bearing end caps

- Damaged blower wheel - Replace Blower Wheel

- Bearing end caps worn - Replace Bearing end caps

- Balancing clips missing - Replace Blower Wheel

- No power being supplied to the unit
from the electrical power source

- Motor contactor / relay defective
(if applicable)

- Loose or broken coupling (belt drive) - Replace or tighten coupling

- Switch is in off position - Turn unit's switch to the on position

- Door limit switch is permanently
closed or energized

- Discharge air vanes out of
adjustment

- Blower motor rotating below normal
speed

- Nozzle out of adjustment and not
angled far out enough (BD only)

- Air stream pushing air outside of the
building

- Low air velocity

- Loose or broken coupling (belt drive) - Replace or tighten coupling

- Confirm power source / check if in on position

- Allow the motor to cool down; motor has auto reset
internal overload; if unit is panel equipped, press
reset button on overload inside panel, or replace
motor overload if overload remains tripped

- Check voltage to coil; check contacts to see if they
are pulling in

- Position the door switch in a manner that turns off the
unit when the door closes, and turns on the unit when
the door opens. Only light pressure required.

- Adjust vanes to proper position
(Refer to Start-Up Section in this manual)

- Switch power leads to correct polarity
(3 phase models only)

- Apply proper voltage per unit requirement
(see unit label) / Adjust adjustable motor speed knob
(if applicable)

- Adjust nozzle angle to outside

- Adjust discharge angle back into building

- Adjust vanes to proper position or check installation

height (Refer to Start-Up Section in this manual)

- Remove obstruction or move air curtain

(Move out 3/8" for every 1" up from the door)

- Provide a make-up air system to relieve negative
building pressure

WARRANTY

Mars’ warranty coverage, period, extent and
limitations apply to the product only. It does not
apply to labor. Mars warrants that Mars product 1)
Is free from defects in materials and workmanship
and 2) Conforms to Mars’ published specifications.
The warranty period for Mars product except heated
and custom models, is a five (5) year period
commencing on its date of shipment. The date on
customer’s invoice is the date of shipment, unless
Mars or your reseller informs you and Mars
otherwise. For heated and custom models, the
warranty period is an eighteen (18) month period
commencing the date of shipment. Mars will
provide free replacement of any part that fails as a
result of a defect in material or manufacturer’s
workmanship. Changes in operational specification
parameters that are different from those provided on
the original purchase order are not covered. Mars
product is inspected and tested before packaging
and is shipped in working condition. The warranty
for Mars product only covers free-of-charge
replacement of failed parts. The warranty does not
cover labor and transportation expenses that may
be required to provide and to install replacement
parts. Because in many instances, it is impossible
to determine the cause of failure, customer may be
responsible for transportation charges associated
with replacement of failed part. Mars does not
warrant uninterrupted or error-free operation of
Mars product. Under no circumstance is Mars liable
for any of the following: 1) Third-party claims
against you for damages; or 2) Special, incidental,
or indirect damages or for any economic
consequential damages (including lost profits and
savings), even if Mars, its suppliers, or its reseller is
informed of their possibility. The warranty does not
cover repair or exchange of Mars product resulting
from misuse, accident, modification, unsuitable
physical or operating environment, improper
maintenance and installation by customer, or failure
caused by a product for which Mars is not
responsible. The warranty does not cover damages
caused by mishandling during transportation. The
warranty is voided by removal or alteration of Mars
product or parts identification labels, by improper
installation of product, and resulting non-compliance
to federal, state and local codes and regulations.
Additionally, Mars reserves the right to void the
warranty for non-payment of invoice.

CONTACT FACTORY FOR COMPLETE PARTS
LIST FOR ALL MODELS.

KEEP THIS MANUAL FOR YOUR RECORDS.

Model Number: ______________________

Serial Number: ______________________

Date Purchased: _____________________

Dealer Purchased From: _______________

14716 S. Broadway St., Gardena, CA 90248

(310) 532–1555 ● [phone]

Fax: [phone]

Please go to our website at www.marsair.com for a

downloadable version of this document.