Fantech MUAS 1600, MUAS 2000, MUAS 750, MUAS 1200 Installation Manual

Installation Manual

MUAS Series

Makeup Air System & Controller

Item #: 497868

Rev Date: 2017-09-27

Technical / Customer Support:

United States Tel.: [phone] Canada Tel.: [phone]

2

Note Warning /

Information Technical

Important

note

Warnings

TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK, OR INJURY TO PERSONS,
OBSERVE THE FOLLOWING:

1. Installation work and electrical wiring must be done by a qualified
person(s) in accordance with national electric codes, local electric
codes, ordinances and regulations, including fire-rated construction
codes and standards.

2. This system is not designed to provide combustion air for fuel­burning appliances.

3. Do not connect the system directly to a combustion appliance of any
type.

4. Before servicing or cleaning any system component, switch power off
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.

5. When performing installation, servicing or cleaning of the system, it
is recommended to wear safety glasses and gloves.

6. Locate the outside air inlet hood above any anticipated snow drift
level and away from any architectural and landscape features to
ensure that the intake area for the outside air duct is not blocked and
provides a clear pathway for outside air to enter the system.

7. When cutting or drilling into wall or ceiling, do not damage electrical
wiring or other hidden utilities.

8. When notching or drilling into framing including floor supports, rim
joists, and wall studs, comply with code and manufacturer limitations
on allowable modifications to these structural members.

9. This system can only be used for its intended design. Any internal
wiring changes, modifications or bypass of any controls, or
installation practices not according to the details of the instruction
manual will void the product warranty. Follow all installation, wiring
and setup instructions indicated in the manufacturer’s manual.

Practical tip

information

Caution

1. Do not locate outside air inlet near hazardous materials or
explosives.

2. System shall not be installed to introduce air from crawlspaces,
garages, attics, adjacent dwelling units, or other locations within the
building shell. System shall be installed to introduce air directly from
outdoors.

3. Do not install the makeup air system and supply ductwork directly
above or closer than a distance of two feet to any furnace or its
supply plenum, boiler, or other heat producing appliance.

4. Any ductwork used in conjunction with the system must be installed
in compliance with all local and national codes that are applicable.

5. Do not operate the system until all system filters have been installed
per the system design.

6. Please read the specification label on each system component for
further information and requirements.

7. Each system component, including filters, should be inspected and
maintained on a regular basis.

8. This system is intended for installation in a dry location protected
from moisture.

9. This system must be installed in an accessible location which allows
for system inspection and maintenance.

10. This system will automatically provide outdoor air into a building.

Coordinate with the HVAC designer/contractor the effects that the
supply of outdoor air will have on the building’s comfort and
mechanical systems. The HVAC designer should take into
consideration the makeup air system's frequency and duration of
use as well as the outdoor air flow quantity.

11. Use this system only in the manner intended by the manufacturer. If

you have questions, contact the manufacturer at the address or
telephone number provided in this document.

12. When federal, provincial or state legislation comprises more

restrictive installation and/or certification requirements, the
aforementioned requirements prevail over those of this document
and the installer agrees to conform to these at his own expense.

fantech

13. Do not supply outdoor air to a space or duct system where water

pipes or water coils might be susceptible to freezing due to the
supply of outdoor air.

Application

3

The Fantech Exhaust Makeup Air System is a low voltage controlled
assembly of components which provides the automatic supply of outdoor
air into a building. When controlled by the current sensing Fantech
Makeup Air Controller “FMAC”, the system is suitable as compensation
for single speed, multi-speed, and variable speed exhaust fans.

The FMAC initiates the makeup air system upon sensing the exhaust fan
motor current, and controls the supply of outside air into the building in
proportion to that being exhausted.

This system may be used to replace air being removed by a kitchen hood
exhaust fan or other continuously or intermittently operating powered
exhaust system. Mechanical replacement of exhaust air allows an
exhaust system to function more effectively, helps to maintain pressure
equilibrium between the building interior and the exterior, and allows
for management (quantity, cleaning, tempering and location) of the
introduction of outside air to the building’s interior space. An electric
heater (optional) may be included as a system component. The heater
is not intended to provide heating to the interior space, but rather to
temper the supply of cold outdoor air before it is delivered to the building.

Due to its component-based, eld-assembled nature, the Fantech Makeup
Air System offers exibility as to where and how it can be installed
into a building. The installation location should be suitable for periodic
inspection and maintenance. It is not required that the individual system
components be installed in a linear (straight line) arrangement. System
components may be connected by duct work (by others) to permit
lengths and elbows for accommodating the physical space available for
installation. It is important to adhere to all instructions included with
each system component for proper installation, however, keeping service
clearances and straight duct lengths upstream and downstream of
components as required.

Depending upon the version of the building code that governs the
installation, there are potentially many code-compliant methods of
introducing the makeup air into the building.

Realizing this, Fantech deems it unacceptable to use central HVAC system

equipment and duct work for treatment and conveyance of makeup air.

Reasons for this include:

• Furnace manufacturers often limit the temperature of air entering
the heat exchanger to no less than 50-55ºF. The equipment warranty
could be voided if the limit is broken.

• Residential HVAC heating and cooling systems typically cycle on/
off with one or two stages of capacity on a signal from the space
thermostat. To put it another way, the central HVAC system is
intended to maintain a condition in the living space, and it only
operates when the living space condition becomes uncomfortable.
Since makeup air comes directly from outdoors, it is often quite
uncomfortable. The uncomfortable makeup air would be conditioned
only when the space thermostat is calling for action.

• The temperature difference between the indoor condition and the
outdoor condition can at times be signicant. Cold makeup air
could cause the formation of condensation on the exterior of poorly
insulated duct work and equipment. Very humid makeup air could
result in condensation on the interior of poorly insulated duct work
and equipment.

The air discharged from the Fantech Makeup Air System will almost
always be contained in duct work (by others), so that the supply of
makeup air may be routed to a suitable location for delivery to the interior
space.

The Fantech Makeup air system components and the system's duct work
must be insulated to prevent the formation of condensation.

Fantech recommends that makeup air be ducted to the space from where
the compensated exhaust is being removed. For example, makeup air
used to compensate a kitchen exhaust hood should be delivered directly
to the kitchen space. For this same example, it is advisable that the air
be delivered to the kitchen in such a way as to not disturb the exhaust
air pattern at the hood. In general, this can be accomplished by locating
the makeup air supply grille at least a few feet away from the footprint of
the kitchen hood, and ensuring that no streams of makeup air supply are
directed toward the area between the range top and the hood. Depending
on the makeup air ow rate, grilles might be suitably located above
kitchen cabinets, behind refrigerators, or simply at a convenient location
on a wall or the ceiling.

fantech

4

Exhaust Makeup Air System Components

7

2

Figure 1. Makeup Air System for Exhaust Fan

1 Wall Intake Hood, FML

2 Fast Clamp, FC

3 Shut-off Damper, ADC

4 Filter cassette, FGR HV

6

5

2

2

5 Makeup Air Fan, prioAir EC or FKD

EC

6 Silencer, LD

7 Duct Heater, Stelpro (optional)

8 Controller, FMAC*

8

4

3

1

2

2

*The FMAC Controller includes a transducer, system control board, 24V transformer, NEMA enclosure,

enclosure back plate for mounting transformer and controller, 4" x 4" electrical box for supporting the
transformer.

Items Which Must Be Furnished By Others:

a. Insulation
b. Wiring
c. Electrical Wiring Boxes
d. Equipment Supports/Hangers
e. Duct work
f. Electrical Disconnect Means
g. Miscellaneous Hardware and Any Other Items not described in this document

fantech

Dimensions

J

MUAS 750 & MUAS 1200

5

Ø

A

B

C

D

E

F

G

Model A B C D E F H (optional) G J

MUAS 750 10 10 30 1/2 7 7/8 26 5/8 85 14 99 8

MUAS 1200 10 10 30 1/2 9 13/16 38 1/2 98 13/16 14 112 13/16 10

Dimensions are in inches.

MUAS 1600 and MUAS 2000

A

B

C

Ø

J

D

E

H

Ø

K

H

Model A B C D E F H (optional) G J K

MUAS 1600 10 1/2 12 30 1/2 18 7/8 38 1/2 110 3/8 14 124 3/8 12 12

MUAS 2000 10 3/4 14 30 1/2 20 /8 38 1/2 114 1/8 24* 138 1/8 14 12

All dimensions are in inches.
*

This dimension includes a 14"-12" duct size reducer (not shown), not provided.

F

G

fantech