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12/30/2020 1 

EI916 

Product Description 

 

This is a self-contained package with a permanent (washable) air filter, electric heating elements, 
modulating element temperature control, powered damper and fan. This product has been designed 
specifically for outside air inlet. 
 
All models include WarmFlo electronic outlet temperature sensor and associated control circuitry to 
modulate the electric elements for a fixed outlet temperature. This means the electric element is only used 
to make-up or heat the outside fresh air to the preset temperature point. There is no overheating or 
inefficient use of the electric element. 
 
Heating elements are locked out when this unit’s outlet air temperature is greater than the set point dial 
switch. 
 
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. 

6.

 

Heating elements are locked out when outlet air temperature is > set point dial switch. 

 

Summary of Contents for EM-MB01

Page 1: ...rn 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...

Page 2: ...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 11 Troubleshooting 12 Routine Maintenance 13 Replacement Parts 13 Drawings UAW873 XX017 ...

Page 3: ...eceiving 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 accum...

Page 4: ...39 63 70 F 45 72 60 F 53 84 50 F 63 101 40 F 79 126 30 F 105 168 Specifications Model kW Btu h Amps Internal CB Motor FLA Motor HP Phase Voltage CFM Max Fuse HACR Duct Connection Max Static EM MB01 120 1 06 1 3 412 8 3 N A 0 5 1 18 1 50 60 Hz 120 150 0 03 15A 6 EM MB02 120 1 06 1 6 5 459 13 3 N A 0 5 1 18 1 50 60 Hz 120 150 0 03 20A 6 ...

Page 5: ...12 30 2020 3 EI916 Dimensional Drawings ...

Page 6: ...L 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 accordi...

Page 7: ...stalling 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 vario...

Page 8: ... 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 higher than inlet end 4 The unit can be mounted within the ceiling between joists where it will fit or ceiling...

Page 9: ...12 30 2020 7 EI916 Horizontal installation Ceiling Mount Vertical Installation Wall Mount Horizontal installation Wall Mount Option A Cover Facing Down Option B Cover Facing Side ...

Page 10: ...amper 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...

Page 11: ...vice size requirements based on UL and NEC code Note These two models require 120VAC source not 240 Source Power route and install proper current carrying conductors as per local code requirements from service panel Nameplate shows current and kW rating Use copper wire only Safety Ground copper wire is required do not depend upon metal conduit ...

Page 12: ...y mode is set to 7 FIGURE 1 Factory default position 6 50 F NOTE MODE dial must 7 Fan Speed Adjustment located in the hinged cover low voltage compartment and on the divider is a plastic shaft knob which allows for fine tuning the fan speed If you do not need full CFM for your application and desire a larger temperature rise the lower factory default set speed may be adequate However you must real...

Page 13: ...elements and warm air after R to W is open for 60 seconds Hi limit manual reset all operations seem normal but the heating element power is interrupted The reset button is in the hinged door compartment on control box divider Auto reset hi limits there are two Temperature control at fan inlet this is set for an approximate 90 F outlet temperature It is in the low voltage logic control circuit LED ...

Page 14: ...is an indication that the micro program cannot read a temperature value This sensor test or indication does not determine a bad temperature reading it simply indicates there is software communication to the sensor itself Temperature Sensor Detail Red wire to J2 1 5VDC or RED Black wire to J2 2 DATA or BLK White wire to J2 3 COM or WHT Air Filter A dirty filter can lead to poor system performance a...

Page 15: ... Filter is simply held within channels Replacement Parts Part Number Description 4037KIT REPLACE TRIAC SSR 50AMP 24 280 VAC 4341 BLOWER SPEED CONTROL 120V 5541 TRANSFORMER 120 240 24 40VA CHNN 5609 LIMIT O 100 C AMP VAC 5610 LIMIT O 99 C 85 10AMP 240VAC 5611 LIMIT 150F CAP BULB MAN RESET EM5621 ELEMENT EM RND 2 5 240 23 OHM EM6613 ELEMENT WX 1 120 14 6 OHM WFCD25605 PCB ASSEMBLY WF 2 STAGE DUCT SE...

Page 16: ...DECAL TITLEBLOCK DO NOT PRINT AS DECAL ...

Page 17: ...acement Labor Allowance Schedule for a period of ninety 90 days from the date of original purchase to the original owner at the original installation site The Repair Replacement Labor Allowance is designed to reduce the cost of repairs This Repair Replacement Labor Allowance may not cover the entire labor fee charged by your dealer contractor TWENTY YEAR 20 LIMITED WARRANTY ON BOILER ELEMENTS AND ...

Page 18: ...ubject to adjustment upon verification of defect 2 Any product or product part that has been damaged as a result of being improperly serviced or operated including but not limited to the following operated during construction phase with insufficient water or air flow allowed to freeze subjected to flood conditions subjected to improper voltages or power supplies operated with air flow or water con...

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