Electro Industries EM-MB00 Instrucciones de instalación
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Installation & Operating Manual
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Packaged Make-Up Air
No Heat Model EM-MB00
Included With This Product
Permanent washable air filter
Powered inlet damper
Temperature sensor
Chain kit for ceiling installations
Other Requirements
Turn-on device (switch closure) connected to R & W (Class II wiring)
High voltage wiring
Fresh air intake wall vent
Inlet/outlet ductwork
Application
This product aids in preventing building depressurization where there is an exhaust blower/fan, coupled
with a tight building envelope.
Conforms to: UL STD.UL1995
Certified to: CSA STD.C22.2#236
DO NOT DESTROY THIS MANUAL. PLEASE READ CAREFULLY AND KEEP IN A SAFE
PLACE FOR FUTURE REFERENCE BY A SERVICE TECHNICIAN.
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Table of Contents
Page
Product Description 1
Handling & Storage 1
Placement & Mechanical Information 1
Product Configurator 2
Specification Tables 2
Dimensional Drawings 3
Safety Consideration 4
Installation Requirements 4
Installation Overview 5
Mechanical Installation 6
Electrical Installation 8
Control Wiring 8
High Voltage Hookup 9
Basic Setup 10
Operational Indicators 10
Troubleshooting 11
Routine Maintenance 11
Replacement Parts 11
Drawings UAW863
XX017
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Product Description
This is a self-contained package with a permanent (washable) air filter, powered damper and fan. This
product has been designed specifically for outside air inlet.
Diagrams used throughout the installation manual represent general installation requirements. Due to
various model sizes available, actual unit mechanical and wiring requirements will vary dependent upon
specific model.
Handling & Storage
Receiving
It is the receiver’s (person and/or company signing off on the receiving Bill of Lading) responsibility to
inspect for shipping damage. All shipping claims must be made by the receiver.
Storage
Packed or unpacked, the Make-Up Air unit shall not be exposed to rain, snow, or other adverse
environment. This product is designed for in-building storage and installation only.
As much as possible this product must be protected throughout the construction phase to avoid
accumulation of dust and moisture on the components and control box. The installing contractor is
responsible for maintaining the cleanliness and quality of this unit until installation is complete and
approved by the user/end customer.
Placement & Mechanical Information
This product is designed for zero clearance, but use the following mounting and spacing criteria:
1. Unit can be installed vertically or horizontally. When vertical, inlet must face down.
2. Make mounting provisions for a 1” air space at the top.
3. The sides, any location, can be in direct contact with wood framing materials.
4. No materials shall be in contact with the cabinet housing which has a flame point less than wood,
300°F (150°C).
5. Product shall be installed in a conditioned space only.
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Specification Table
Specifications
Model
CFM
Volts Phase Internal
CB
Motor
FLA
Motor
HP
Max Fuse/
HACR
Amps
Duct
Connection
Max Static
EM-MB00-120-1-06 150 0.03” 120 1-50/60 Hz N/A 0.5 1/18 15A 6”
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Dimensional Drawings
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Safety Consideration
WARNING
BEFORE PERFORMING SERVICE OR MAINTENANCE OPERATIONS ON A SYSTEM, TURN OFF
MAIN POWER SWITCHES TO THE INDOOR UNIT. IF APPLICABLE, TURN OFF THE ACCESSORY
HEATER POWER SWITCH. ELECTRICAL SHOCK COULD CAUSE PERSONAL INJURY.
Installing and servicing electric heating equipment can be hazardous due high voltage and electrical
components. Only trained and qualified service personnel should install, repair or service heating and air
conditioning equipment. Untrained personnel can perform the basic maintenance functions of cleaning
coils and cleaning and replacing filters. All other operations should be performed by trained service
personnel. When working on heating and air conditioning equipment, observe precautions in the
literature, tags and labels attached to the unit and other safety precautions that may apply, such as the
following safety measures:
Follow all safety codes.
Wear safety glasses and work gloves.
Installation Requirements
1. All installation work must be performed by trained, qualified contractors or technicians. Electro
Industries sponsors installation and service schools to assist the installer. Visit our Website at
www.electromn.com for upcoming service schools.
WARNING
ALL ELECTRICAL WIRING MUST BE IN ACCORDANCE WITH NATIONAL ELECTRIC CODE AND
LOCAL ELECTRIC CODES, ORDINANCES, AND REGULATIONS.
WARNING
OBSERVE ELECTRIC POLARITY AND WIRING COLORS. FAILURE TO OBSERVE COULD CAUSE
ELECTRIC SHOCK AND/OR DAMAGE TO THE EQUIPMENT.
CAUTION
This unit can only be used for its intended design as described in this manual. Any internal
wiring changes, modifications to the circuit board, modifications or bypass of any controls, or
installation practices not according to the details of this manual will void the product warranty,
the safety certification label, and manufacturer product liability. Electro Industries cannot be
held responsible for field modifications, incorrect installations, and conditions which may
bypass or compromise the built-in safety features and controls.
CAUTION
This unit shall not be operated (blower) until the interior of the structure is completed and
cleaned. This also means all duct work must be complete with filter, etc. Manufacturer’s
warranty is void if this unit is operated during structure construction.
CAUTION
Hazards or unsafe practices could result in property damage, product damage, severe personal
injury and/or death.
2. At Electro Industries the safety of the installer and the end user is of highest priority. Remember,
safety is the installer’s responsibility and the installer must know this product well enough to instruct
the end user on its safe use. Professional installers should be trained and experienced in the areas of
handling electrical components, sheet metal products, and material handling processes.
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Installation Overview
This Make-Up Air unit contains interface/logic devices, outlet temperature sensor, power open/spring
close damper, permanent washable filter and fan motor. Based on the application, other system
components may be required to make your system operate as desired. These components must be
provided by the installing contractor. These components may include but are not limited to:
Outside inlet hood
Insulated inlet ducting
Outlet ducting
The turn-on method or switch
- Remote damper with END switch (also see Control Wiring section)
- Current sensing switch, building exhaust fan/blower
- Relay contact detecting the building exhaust fan/blower running
Source power wiring
Refer to the below diagrams which show various system configurations.
Make-Up Air Independent System Make-Up Air Combined Return Tie-In &
Independent System
Make-Up Air Return Tie-In System
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Mechanical Installation
This product is designed for zero clearance, but use the following mounting and spacing criteria:
1. Unit can be installed vertically or horizontally. When vertical, inlet must face down.
2. Observe the airflow direction decal and the inlet decal.
3. Make mounting provisions for a 1” air space at the top.
4. The sides, any location, can be in direct contact with wood framing materials.
5. No materials shall be in contact with the cabinet housing which has a flame point less than wood,
300°F (150°C).
6. Product shall be installed in a conditioned space only.
General:
1. Select a location which will provide minimal noise vibration and minimal fan noise to the
building occupants.
2. The outside hood and ducting material are not included with this unit. It is the installer’s
responsibility to provide the necessary weather protection for the inlet.
In cold climates, insulated ducting must be used between the outside inlet air hood and the
inlet of this unit.
3. Install unit with a slight air inlet incline (housing outlet end is ¼” higher than inlet end).
4. The unit can be mounted within the ceiling (between joists where it will fit) or ceiling hung, at
any convenient location between the outside inlet hood and the fresh air discharge connection.
The discharge connection is wherever the conditioned fresh air is distributed within the
building – furnace cold air return, special ducting, hallway register, furnace room, etc.
5. 6” inlet and outlet ducting is adequate for these two mini models.
Note: In cold climates, frost and or condensation may collect on metal parts of this product. External field
provided insulation may be required in certain situations. The inlet damper and insulated inlet piping will
prevent cold air migration and a slight incline will keep moisture collection at the inlet end.
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Horizontal installation – Ceiling Mount Vertical Installation – Wall Mount
Horizontal installation – Wall Mount
Option A: Cover Facing Down Option B: Cover Facing Side
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Electrical Installation
Temperature Sensor
Air outlet temperature sensor is included. Without proper installation of this probe the Make-Up Air
unit will not operate correctly.
The sensor probe/cable is attached to the control board. However, the sensor probe must be installed
external to this unit. Install in the outlet duct, 24” to 36” away from discharge fan.
Control Wiring
Dry Type Switch Contact
This on and off control contact applied across R and W depends upon installation requirements and can
take on several possibilities:
Pressure differential switch
CT with integrated switch contact
Relay across exhaust blower motor
End switch associated with exhaust damper/motor
Connection Details
Connect one side of the field provided switch to the TB1 R
and the other side of the switch to the TB1 W.
External Damper, Field Furnished and Installed
If this installation requires or desires a power damper at the
through-wall hood, this can be field furnished and wired
using the following guidelines:
Required is a 24VAC power to open, spring close.
Note: It is assumed the existing power damper will be removed, damper blocked open, or actually used in
parallel with the field added damper.
External damper without end switch:
1. Locate the two wires connected to the existing damper (violet and gray).
2. Splice and extend these two wires (powered to open) to the external damper, powered to open.
External damper with end switch:
1. The external damper motor is driven from the exhaust blower turn-on contact closure or device.
2. Locate the external damper END switch closed when open contact terminals or two wires.
3. Extend these two wires to the R and W terminal block.
4. Sequence:
a. With this arrangement (paragraph 1 above) there is no other turn-on device (current
switch, thermostat, airflow switch, etc.)
b. When the exhaust blower comes on, that same component or mechanism also opens this
external damper.
c. When the external damper end switch closes it turns on this Make-Up Air unit, at R to W.
d. All other functions now begin with the R to W turn-on.
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