Shaefer BigDog Installation Manual

®

72" Ventilator

INSTALLATION

MANUAL

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TABLE OF CONTENTS

INSTALLATION GUIDELINES FOR THE 72" BIGDOG FAN _____________________________ 3
Introduction _______________________________________________________________ 3
Proper design and installation ________________________________________________ 3
Receiving the system _______________________________________________________ 4
Optional electrical components ________________________________________________ 4

OVERVIEW OF THE PROJECT MECHANICAL INSTALLATION

__________________________ 5

BIGDOG installation preparation ______________________________________________ 5

MECHANICAL INSTALLATION PROCEDURE

________________________________________ 6

Before you raise the BIGDOG ________________________________________________ 6
Two step installation ________________________________________________________6

DIRECTIONS FOR HANGING/MOUNTING THE BIGDOG

_______________________________ 7

Ceiling suspended method ___________________________________________________ 7
Wall or column mount method ________________________________________________ 7
Floor standing mount method _________________________________________________ 7

ASSEMBLY REQUIRED WITH THE BIGDOG IN THE AIR _______________________________ 8

 Deectorsupportbracketsandinstallation _______________________________________ 8
BIGDOG fan velocity diagram ________________________________________________ 9

ELECTRICAL INSTALLATION PROCEDURE ________________________________________ 10

 Generalnotesforvariablefrequencydrive(VDF)systems _________________________ 10
 Variablefrequencydrive(VFD)installation ______________________________________ 10
 PowermotortoVFDterminalwiring ___________________________________________ 11
 Powerwiringfrombuildingsystem ____________________________________________ 11

Low voltage control wiring __________________________________________________ 11
Manual control system _____________________________________________________ 11
Automatic control system ___________________________________________________ 11

START UP PROCEDURE ________________________________________________________ 12

VFD PROGRAMMING NOTES ____________________________________________________ 12

MANUAL CONTROL SYSTEM____________________________________________________12

AUTOMATIC CONTROL SYSTEM _________________________________________________ 12

BIGDOG®isaregisteredtrademarkofSchaeferVentilation.

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INSTALLATION GUIDELINES FOR THE 72" BIGDOG® FAN

INTRODUCTION:

The Schaefer Ventilation Equipment, LLC. BIGDOG
fan is one of the most innovative and efcient fans
available in the world today. Our BIGDOG can be used
to move large volumes of air, create velocity for cooling
and run on low speed to de-stratify the air in your

building. It does all of these applications efciently and

quietly. The BIGDOG can be used as a stand alone
ventilation system or to improve your existing ventila­tion. This brief manual is recommended reading before
installing the new system and will also be handy during
the installation. (See Figures 1 and 1A)

PROPER DESIGN AND INSTALLATION

Your sales professionals have given you a
recommendation for placement, orientation and
operation. If you are unsure then call our
800-779-3267 number for customer care.

It is up to you as the owner to ensure that your
building is made ready for the system.

• We recommend that you hire licensed and insured

consultants and contractors to install this equipment.
The installation is by design made simple for skilled
tradesmen.

• We recommend that the receiving of this system be
coordinated and veried to avoid lost time due to

misplaced equipment.

FIGURE 1

FIGURE 1A

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RECEIVING THE SYSTEM

MECHANICAL COMPONENTS

The BIGDOG is shipped in one skid (Figure 2 and 2A).

1. BIGDOG: fan, motor, belts, sheaves, and framing
are shipped as one piece and no further assembly is
required.

a. Weight 375 lbs without packaging and skid.

i. Package 1 weight is 500 lbs
ii. Skid size are roughly 8' L x 3' W x 8' H.

2. The deectors, mounting hardware and deector

mounting brackets are shipped with the fan and

require assembly. The additional weights of these

units are 50 lbs.

3. Optional mounting units (purchased seperately)

a. Ceiling Hung Unit (Package weight is 15 lbs)
b. Wall or Column Mounting Assembly (Package

weight is 140 lbs w/o skid)

c. Base and Post Mounting Assembly (Package

weight is 235 lbs w/o skid)

FIGURE 2

4. The BIGDOG Cable Kit has a safe working load

rating of 1,038 lbs with cables at 45 degrees and a

safety factor of 5:1.

OPTIONAL ELECTRICAL COMPONENTS:

To achieve the full performance of the BIGDOG fan we
recommend using a Variable Frequency Drive (VFD). The
VFD will allow you to manually run your fan from low
speed (300 watts) to high speed (2200 watts). You can also
add one of our temperature controls that can be wired to
the VFD and change the speeds based on
temperature, time or humidity. Call our technical
support line (800-779-3267) for a list of Schaefer
Ventilation Equipment, LLC. approved controls. It is
important that controls are sized properly for the amp
loading of the fan.

FIGURE 2A

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OVERVIEW OF INSTALLATION OF THE

PROJECT MECHANICAL INSTALLATION

BIGDOG INSTALLATION PREPARATION

Review this entire manual with the installation
team and share information with necessary
personnel.

 Physically conrm the arrangements and

locations of the system BIGDOGs and
controls. Verify your order documents for the

system conguration.

 There are several components that can be

assembled on the oor for economical

BIGDOG system installations.

Consult your construction professionals.

 Consult with your professional construction team

and review this installation.

 Review and prepare your electrical and structural

building components.

Plan to receive and store the system components.

 CHECK THE FREIGHT IN AND INSPECT IT

WHILE THE DRIVER IS PRESENT. REPORT
ANY DAMAGES TO THE DRIVER AND
SCHAEFER CUSTOMER CARE.

 Store the freight in a location that has proper

access for material handling.

 Set the

storage
space aside.

All the oor work should be in a dedicated
workspace to begin the installation. The fans have
heavy eye loops for handling and hanging. The
BIGDOG is heavy and awkward to handle. Please
use caution and maximum safety when handling.

 As an option, the variable frequency drive can

be resilient mounted to this side of the fan. This
requires drilling ¼" holes in the BIGDOG hous­ing. Install the VFD onto the BIGDOG while it is
on the ground using grommets or 1/8" thick
rubber washers and 1/4-20 x 2" bolts with captive
nuts and washers. The VFD shall be positioned

upright to allow airow out both sides of the heat

sink.

 When installing this fan in high moisture applica-

tions, a waterproof connector and drip loop in the
wire should be used.

 Check sheaves and belts for alignment and

tension in case they have moved during shipping.
They should be adjusted if required.

 The bearings can be inspected and greased as

required. We recommend yearly greasing and

maintenance. Grease nipple is located on the
back of the blade shaft.

 Inspect for defects or missing parts.

Discrepancies shall be reported to Customer
Care. (Figures 3, 4 and 9)

Prepare to move and erect the BIGDOG.

FIGURE 3

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FIGURE 4

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MECHANICAL INSTALLATION PROCEDURE

BEFORE YOU RAISE THE BIGDOG

®

Inspect and check the belts, sheaves, motor, blades,

housing, deectors, brackets, controls and mounting

hardware.

Install the Variable Frequency Drive (VFD) and wire the

motor while the BIGDOG is on the oor. (See Figure 9

for Electrical Installation Procedure)

WARNINGS:

• Do not install the top of the fan housing closer than

6' to the ceiling/roof deck.

• Do not install the bottom of the fan lower than 7'

above the ground.

• Do not install fans where they may affect the
performance of emergency sprinkler systems.

TWO STEP INSTALLATION

1. BIGDOG is suspended.

a. Two-way airow BIGDOGs shall be installed

level. (See Figure 4 and 8)

b. One-way airow BIGDOGs shall be tilted 0 - 30

degrees up in the direction of airow.
(See Figure 5, 6 and 7)

2. BIGDOG deectors are installed.
a. The outside deector brackets and deectors

should be installed after the fan is securely

mounted to prevent damage to the deectors.

FIGURE 4

TWO METHODS OF INSTALLATION:

1. Ceiling Suspended

2. Wall Mount

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FIGURE 5

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DIRECTIONS FOR HANGING THE BIGDOG

CEILING SUSPENDED METHOD

Install the fans in the locations directed by your
system provider.

Use Grade 80 or 100 Chain or Aircraft Steel Cable that
can handle minimum of 425 LBS of hanging weight.

Follow the chain or cable manufacturer’s directions
for installing and connecting the suspension sys­tem components. All components must be rated for
OVERHEAD LIFTING.

®

POLE MOUNT AND WALL MOUNTED
METHOD

Pole Mount assembly anchors to concrete oor.
Use with Straight or Angled fan mount.

There are 4 eyelets factory installed on the fan. These
metric eyelets are M10 x 75 shanks with 30 mm loops.
These eyelets are placed near the corners of the fan

housing at approximately 54" center to center.

Cable or chain shall be installed vertically to the

ceiling at up to a 45 degree angle away from the center

of the fan.

Ceiling structure fasteners shall be done with Heavy

Beam Clamps and 3/8" Eyelets or drilled 3/8" eyelets
with heavy backing washers and double heavy nuts.

• Z-Purlins may require reinforcement to prevent

twisting.

• Be sure to evaluate that the structure is strong

enough to support the 425 LBS BIGDOG.

Wall brackets can be mounted to columns or walls.
Use with Straight or Angled fan mount.

The BIGDOG fan will be cantilevered away from the

mounting structure by approximately 62".

Refer to the BIGDOG Pole & Wall Mount specica-

tions sheets to review the forces that will be exerted.

Be sure to evaluate that the structure is strong enough

to support the BIGDOG fan and mount assembly.

As an added safety measure, we recommend adding

the Safety Cable Kit when the fan is mounted in fork-

lift trafc areas or mounted over people.

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ASSEMBLY REQUIRED WITH THE BIGDOG® IN THE AIR

DEFLECTOR SUPPORT BRACKETS
AND INSTALLATION

Deector support Brackets are to be installed on the
inside of and on opposite at sides of the BIGDOG

housing. The brackets are located on the sides that
have a curved bottom edge contour with holes drilled

to mount the deector brackets.

There is a difference in the bracket arrangements for
the one-way (See Figure 6 and 7) or two-way airow

(See Figure 8).

Use (12) M8 x 30mm bolts, the (12) nylock nuts
and (24) 8mm x 25mm fender washers to mount the
deector brackets.

Install the turning vanes in-between the brackets

with the (24) M8 x 40mm bolts, and the (24) 8mm x
25mm fender washers. Notice the difference between
two-way or one-way airow. (See Figures 7 and 8).

Finger thread and snug these bolts being careful not
to over tighten these bolts.

FIGURE 6

When you have completed setting the deector
angles you must wrench tighten these bolts to no
more than 20 ft-lbs. Refer to fan adjustments in

the start up section.

See the next page for suggested Air Flow Pattern
and Velocity Mapping.

12 Set

(4) bolt
M8*30

(2) lock-nut M8

No. Name Qty.
4 bolt M8*30 12
3 bolt M8*40 24
2 lock-nut M8 12
1 washer 08*025 48

(1) washer 08*025

(1) washer 08*025

(3) bolt
M8*40

24 Set

FIGURE 7

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FIGURE 8

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BIGDOG® FAN VELOCITY DIAGRAM

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ELECTRICAL INSTALLATION PROCEDURE

GENERAL NOTES FOR VFD SYSTEMS

1. We recommend that a licensed electrician perform

all electrical work per Federal, State and Local
Electrical and Safety Codes.

2. The Building Voltage system must be understood.

Each voltage system has a variable frequency
drive (VFD) that matches.

a. The BIGDOG Motor requires 230V or 460V

3 phase alternating current 60-Hertz power.

See the nameplate and/or motor tap box for
motor terminations.

i. Use the 230V (Low Voltage) motor pigtails

for 240/1 and 200-230/3 wiring systems.

ii. Use the 460V (High Voltage) motor pigtails

for 460/3 wiring systems.

b. The VFD is specied for the 240/1/60, 208-

230/3/60 and 460/3/60 voltage system in your
building. See VFD manufacturer’s installation

manual for specic terminations and settings.

3. The VFD shall not be located where corrosive

gasses and/or chemicals, water and condensation

are present. An Optional VFD Rated NEMA 4/4X

is available for special high humidity applications.

a. Consult your licensed electrician for special

occupancy and exposure requirements.

b. The VFD comes standard as a NEMA 1

usage. NEMA 1 means indoor clean and dry
locations. Moisture, dust, water, chemicals,

gases that occur where the VFD is installed
demands that the VFD is protected. Severe

Duty Locations require specic protection.
The NEMA Type 4/4x enclosure is considered

non-corrosive and moisture proof.

4. The VFD shall not be located near furnaces or

panel heating devices. Avoid heat sources.

5. The VFD shall not be located near magnetic

detection systems. Special optional lters are

available.

6. Do not install anything in the wiring between the

VFD and the Motor.

7. GROUNDING IS IMPORTANT FOR PEOPLE

AND ELECTRONIC SAFETY.

a. Be sure that the buildings electrical system is

properly grounded.

b. Be sure to terminate the ground systems per

the VFD instruction manual.

8. Poor electrical power systems demand special
considerations.

a. Consult with experienced Electrical Engineer

and/or Certied Electrician.

b. Consult with the VFD manufacturer.
c. Call Schaefer Ventilation Equipment, LLC.

technical support (800-779-3267).

FIGURE 9

OPTIONAL INSTALLATION SCHEME
FOR VARIABLE FREQUENCY DRIVE (VFD)
(Figure 9)

See the General Notes and the Manufacturer’s
Instruction.

The drive and motor terminal wiring can be done

ahead of time on the oor.

The VFD shall be resiliently mounted in an upright

position that allows airow through the fan powered
cooling ns on the back of the VFD. The VFD is not

position sensitive.

Be sure that rubber grommets or 1/8” rubber at
washers are installed between BIGDOG housing and
VFD.

Check to see that the new bolts and new captive nuts
were tightened such that the rubber washer/grommet
just begins to compress.

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POWER MOTOR TO VFD TERMINAL WIRING

NOTE: The wiring for the motor shall be separate
from the power wiring to the VFD.

• A 3HP, 82% efciency 3-phase 1760RPM totally

enclosed fan cooled alternating current motor
drives the BIGDOG fan. Verify the nameplate
data of the motor and note this information to use
in programming the VFD parameters.

• The variable frequency drive (VFD) must be closer
than 50’ using normal wiring methods.

• The VFD can be resiliently mounted to the BIG­DOG™ housing and wired in exible conduit or

with heavy-duty cord.

• Minimum wire for motor wiring shall be AWG
#12 stranded copper wire. Use type THHN/MTW

for the four separate conductors or 4 conductor

SJO/SOO/SO cord. Use proper wiring and termi­nation methods per NEC. On wire runs exceeding
200 feet use AWG #10.

• Use the proper connectors to connect the wiring
to the VFD and the Motor Tap Box per the NEC.
Strap the cable/exible conduit properly to keep

wiring away from the fan blades. In high humidity
applications we recommend using water tight
connectors and installing a drip loop on the motor.

• Size the OCP (Breaker or Fuse) per the VFD
manufacturer’s instructions and per the Code.

• The VFD is rated IP 55. Consult your electrical
contractor and the VFD manufacturer for input
regarding multiple VFD branch circuits and poten­tial for input line reactors.

• Always refer to the VFD manufacturer’s installa­tion manual for specic details.

• A separate electrical disconnecting method is

recommended. This disconnecting means maybe as
simple as a cord and plug. Consult your electrical

contractor for specics.

LOW VOLTAGE CONTROL WIRING

• The low voltage wiring shall be separate from the

power wiring. This is a 10V DC analog signal.

• Shielded cable is recommended. Tape the shield

back at the remote speed control box and terminate
the shield at the VFD ground terminal per manu­facturer’s directions.

MANUAL CONTROL SYSTEM

Requires one Class 2, 3-conductor shielded cable
connected between the VFD and the remote speed
control. The VFD provides the 10V DC power source
for this 3-wire control loop.

• Terminate the motor wiring per the VFD
manufacturer’s instructions.

VFD Note: There are 2 grounding points that are
each marked PE. Land the motor ground lead and the
mechanical ground lead properly!

POWER WIRING FROM BUILDING SYSTEM

• The power wiring shall be separate from the motor

wiring.

• The current required for the VFD and Motor is

different for the various typical voltage systems.

• Size all conductors for 3% voltage drop.

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• Use AWG #22 stranded copper conductors for
distances up to 100’.

• Use AWG #20 stranded copper for distance up to
500’.

• Use AWG #18 stranded copper for distance up to

1000’.

AUTOMATIC CONTROL SYSTEM

Specic directions will be provided for the Automatic

Control System Options.

Page 11

START UP PROCEDURE

 Check that the power is turned off.

 Check VFD and Wiring Terminations for tight

connections.

 Verify that the VFD is clean and dry.

 Test power wiring for short and open circuits.

VFD PROGRAMMING NOTES

Refer to the VFD Instruction Manual before
programming VFD.

MANUAL CONTROL SYSTEM

• Fan is started when the power is turned on.

• A jumper is required on the VFD low voltage

terminals 1 & 4.

 Ensure that suspension cable clamps or chain

links are tight and closed.

 Ensure the fasteners of the wall or post supports

are tight.

 Check that the BIGDOG and the circuit breaker or

fuse clip is labeled.

 Ensure that the fan turns freely and is quiet. Check

the belts too.

 Clear the area around and below the BIGDOG.

 Energize the power circuit.

 Test the voltages at the drive and record them.

 Program the VFD per the VFD instruction manu-

al. See programming notes below.

 Jog the fan motor on and off to ensure the proper

rotation. The fan will turn clockwise looking up
at the fan. Note: If the fan blade turns counter

clockwise, you will need to de-energize the fan
and wait for the VFD to discharge. Then reverse
two of the motor wiring phase terminals leads.
Jog the fan again to ensure the proper rotation.

 Start the fan and check the airow.

 Setting the airow. The deector vanes can be

adjusted to direct the air stream. Allow 2-3 min-

utes for air ow stability before making more

adjustments.

• Remote speed potentiometer box controls the

speed.

• The pot is wired to the VFD low volt terminals 2,

5 & 6 where the pot wiper is landed on terminal 5.

• The drive parameters are set to default unless listed

below. Refer to the VFD

P101 = Standard Reference Source = 1 (0-10Vdc)
P102 = Minimum Frequency = 20
P110 = Start Method = 1 (Start on power up)
P302 = Motor Nameplate Voltage
P303 = Motor Nameplate Rated Current
P304 = Motor Nameplate Rate Frequency
P305 = Motor Nameplate Rated Speed
P306 = Motor Nameplate Cosine Phi = or use

calculation in manual

AUTOMATIC CONTROL SYSTEM

Call your authorized Schaefer Ventilation Equipment,

LLC. customer support team (800-779-3267) for a list
of manual and automatic temperature controls.

Thank you for purchasing one of our Schaefer Ventilation Equip-

ment, LLC. products. The BIGDOG has a two year warranty
covering all parts of the fan. The warranty is for the original
purchaser only and is void if installed incorrectly, damaged
or not maintained properly. You must call Schaefer Ventilation
Equipment, LLC. 800-779-3267 to get a return authorization
number. The product must be returned freight prepaid in the
original packaging for repair. The repaired fan will be returned

freight collect.

BIGDOG® is a registered trademark of Schaefer Ventilation

Equipment.

©2012 Schaefer Ventilation Equipment. Rev. 5-13-13.

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