ENERVEX MFD Installation instructions

3916100 07.12 Installation & Operating Manual
USA
CAN
MFD Mechanical
Fireplace Damper
ENERVEX Inc.
1685 Bluegrass Lakes Pkwy.
Alpharetta, GA 30004
P: 770.587.3238
F: 770.587.4731
T: 800.255.2923
[email protected]
www.enervex.com
Job Name:
Installer:
Installation Date:
Product Information
Mechanical Installation
Electrical Installation
Start Up and Conguration
Maintenance and Troubleshooting
.......................... Chapter 1+2
......................... Chapter 3
............................. Chapter 4
.................. Chapter 5
...... Chapter 6
READ AND SAVE THESE INSTRUCTIONS!
Volko Supply
www.chimneyfansource.com
800 685 8263

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3916100 07.12
How to use this manual
This installation manual does not contain any system design
documentation. System design documentation is available from any
authorized EXHAUSTO representative.
Accessories, fans and variable frequency drives are not covered by
this manual. Please refer to these component’s individual manuals.
1. Product Information
1.1 Function ...............................................................................................3
1.2 Shipping ...............................................................................................3
1.3 Warranty...............................................................................................3
1.4 Components.........................................................................................3
2. Specications
2.1 Dimensions & Capacities......................................................................4
3. Mechanical Installation
3.1 Actuator and Cover ..............................................................................5
3.2 Location................................................................................................5
4. Electrical Installation
4.1 General ................................................................................................6
4.2 Wiring of a Gas Fireplace With a Damper............................................7
5. StartupandConguration
5.1 Set Up..................................................................................................8
5.2 Sequence of Operation ........................................................................8
6. Maintenance
6.1 Cleaning .............................................................................................. 8
!
!
TO REDUCE THE RISK OF FIRE, ELECTRICAL SHOCK OR INJURY TO PERSONS,
OBSERVE THE FOLLOWING:
Caution: Indicates an imminent hazardous situation
which, if not avoided, may result in personal injury or
property damage.
SymbolLegend:
The following terms are used throughout this manual to bring attention
to the presence of potential hazards or to important information
concerning the product.
Danger: Indicates an imminent hazardous situation
which, if not avoided, will result in death, serious injury or
substantial property damage.
1. Use this unit in the manner intended by the manufacturer. If
you have questions, contact the manufacturer at the address or
telephone number listed on the front of the manual.
2. Before servicing or cleaning the unit, switch off at service panel
and lock service panel to prevent power from being switched on
accidentally.
3. Installationworkandelectricalwiringmustbedonebyaqualied
person(s) in accordance with applicable codes and standards.
4. Follow the appliance manufacturer’s guidelines 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 the
local code authorities.
5. This unit must be grounded.

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3916100 07.12
ce
b
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1. Product Information
1.1 Function
Use TheENERVEXMFDisalowprole,automatedreplacedamper.Itisforuseonlyinconjunctionwith 
an ENERVEX ADC100 control and RS model chimney fan as part of the EcoDamper System. It prevents
 excessheatfromescapingthroughthechimneywhenthereplaceisnotinuse.
 TheMFDisdesignedforchimneytopinstallationsandisforusewithgasreplacesonly.
Function The MFD is powered by a 120 or 24 VAC actuator. The actuator is interlocked to the control so it only
 operateswhenthereplaceisinuseandthefanisrunning.Whenthereisacallforheatfromthereplace,
the ADC100 control begins its operational sequence to open the damper and start the chimney fan. Once
 thedamperopensandthereissufcientdraftinthechimney,thecontrolreleasesthegasvalvefor 
 replaceoperation.
The actuator has two endswitches to prove damper position (open or closed) and is equipped with the
Enerdrive fail safe system to open the damper in the event of an electrical or mechanical failure.
The damper is rated for temperatures up to 575oF (300oC).Thedamperissizedtoprovidesufcient 
clearance between the damper blade and the fan inlet when open.
Construction The MFD is constructed of 18 gauge, type 304 stainless steel.
Code Compliance System installation must conform to the requirements of the authority having jurisdiction. When required by
the authority having jurisdiction, the installation must also conform to the NFPA31, NFPA54 or NFPA211.
All electrical wiring must be in accordance with the requirements of the authority having jurisdiction or, in
absence of such requirements, with the National Electric Code, NFPA 70.
1.2Shipping
Damper, actuator, cover and hardware are shipped as a unit
* If other components are shipped, they will appear as separate items on the packing list.
1.3 Warranty
2-Year Factory Warranty. Complete warranty conditions are available from ENERVEX, Inc.
1.4 Components
Components of the MFD are listed below:
a. Actuator / Actuator Cover
b. Stop Flange
c. Fan Adapter
d. Collar
e. Damper Blade
Fig.1

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3916100 07.12
Specications
Fan Model: RS009 and RS012
Chimney Size: 8” 10” 12”
Dimensions: Ø A in 7.87 9.87 11.87
mm 200 251 301
BxB in 15.6 15.6 15.6
mm 396 396 396
Cin 17.6 18.5 19.3
mm 447 470 490
Din 1.75 2.0 2.5
mm 44 51 64
Fan Model: RS014 and RS016
Chimney Size: 8” 10” 12”
Dimensions: Ø A in 7.87 9.87 11.87
mm 200 251 301
BxB in 19.0 19.0 19.0
mm 483 483 483
Cin 19.7 20.6 21.5
mm 500 523 546
Din 1.75 2.0 2.5
mm 44 51 64
2.Specications
2.1 Dimensions & Capacities

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3916100 07.12
RS FAN
MFD
STEEL
CHIMNEY
3. Mechanical Installation
3.1 Actuator
Before installing the MFD on the chimney, a power cable should be wired to the actuator (See Ch. 4) and the actuator cover
should be secured.
Use 4-conductor cable (min. 18 AWG) with a weatherproof jacket such as rubber or silicone. Install a weatherproof cable
connector on the side of the actuator cover to prevent water ingress to the actuator.
Use (6) of the included sheet metal screws to secure the actuator cover to the MFD. Once secure, apply a bead of silicone
around the seams of the cover.
3.2 Location
Mount the MFD outdoors at the top of a steel chimney. Slide the collar of the MFD into the steel chimney until the
 damperrestsonthestopange.Sheetmetalscrewsmaybeinstalledaroundthecollarintothechimneyforadditional
support.
Once the MFD is secured, place the RS fan on the adapter. Use the mounting holes on the fan base as a drill template
to make one mounting hole in each corner of the adapter. Use bolts and locking nuts to secure the fan to the MFD.
Fig.3
SHEET METAL SCREWS
(2) ON TOP SIDE
(4) ON BOTTOM SIDE
CABLE
CONNECTOR
Fig.2

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3916100 07.12
CONNECTION OF 24 VAC ACTUATOR
24 VAC
4. Electrical Installation
4.1 General
Danger:Turnoffelectricalpowerbeforeservicing.Contactwithliveelectriccomponentscan
cause shock or death.
 Verifyvoltageofactuatorbeforeconnectingtoapowersupply.Actuatorwillrunoneither120VAC
or 24 VAC
Wire that actuator for 2 wire/ 2 position operation as shown in Fig. 4 (120 VAC) and Fig. 5 (24 VAC) below.
The actuator should be set for clockwise (CW) rotation and should fail to 90o(MFD will open). Verify settings of the
actuator before wiring.
!
Fig.5
120 VAC
CONNECTION OF 120 VAC ACTUATOR
Fig.4

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3916100 07.12
L N
29 30
N
NC
NO COM
25 26
1/120/60
-/~ -/~
C NO C NO
4.2WiringofaGasFireplace
 TheMFDmustbeinterlockedtoanENERVEXcontrol.WhenusedwithagasreplaceaspartoftheEcoDamper 
System, both a RS Chimney Fan and MFD will interlock with the ADC100 control as shown below.
Power to the actuator must be supplied externally. Interlock the damper with the control board via terminals 27 and 28
as shown below. The Normally Open and Common terminals of the actuator endswitches should connect to the damper
prove terminals (29 and 30).
Complete system wiring details are shown in the ADC100 Control Installation Manual.
Fig.6

ENERVEX Inc.
1685 Bluegrass Lakes Pkwy.
Alpharetta, GA 30004
P: 770.587.3238
F: 770.587.4731
T: 800.255.2923
[email protected]
www.enervex.com
3916100 07.12
  5.StartupandConguration
5.1 Set-Up
Once the MFD has been installed, verify operation and rotation of the damper. The end of the damper rod is notched to
indicate position of the damper blade. As the actuator opens the damper, the notch will indicate movement from 0 to 90o
in the clockwise (CW) direction.
If the damper does not operate correctly when power is supplied or if it rotates the wrong direction, verify wiring as
shown in Ch. 4 of this manual.
5.2 Sequence of Operation
See the Ch. 5 of the ADC100 Control Installation Manual for the sequence of operation of the EcoDamper System.
  6.MaintenanceandTroubleshooting
6.1Cleaning
Clean the MFD periodically at the same time the fan and/or chimney are cleaned.
Damper should be cleaned with a cloth or rag. Check for and remove any debris that may be blocking the damper
opening or chimney.
Volko Supply
www.chimneyfansource.com
800 685 8263