--------------------------------------------------------------------------------------- Installation & Operating Manual --------------------------------------------------------------------------------------- Packaged Make-Up Air Heat Models EM-MC*, EM-MD*, EM-ME*, EM-MF*, EM-MG* Included With This Product Permanent washable air filter Powered inlet damper (2) temperature sensors (1) current transformer (CT doughnut) Chain kit for ceiling installations Other Requirements Low voltage (Class II t
Table of Contents Page Product Description 1 Handling & Storage 1 Placement & Mechanical Information 1 Product Configurator (EC904) 2 System Status 2 Specification Tables 3 Dimensional Drawings 4 Safety Consideration 5 Installation Requirements 5 Installation Overview 6 Mechanical Installation 7 Electrical Installation 10 Control Wiring 11 High Voltage Wiring 14 Basic Setup & Configuration 15 Software Configuration 17 Understanding the Product Display 18 Normal Operation Sc
Product Description This is a self-contained package with a permanent (washable) air filter, electric heating elements, modulating element temperature control, powered damper and blower. 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.
System Status STATUS LED Status LED (front yellow LED) – is software driven LED which alerts the user that a message is available in the message center. Status LED OFF = No message is available Status LED Blinking = Message is available o To access available messages, the user must press and hold the “SELECT” button for 3 seconds.
Specification Tables Temperature Rise & CFM Chart Specifications CFM Max Static Max Fuse/ HACR Amps Duct Connection 240/208 350 .50 30 8” 3 208 350 .50 20 8” 1/5 1 240/208 600 .50 60 10” 0.8 1/5 1 240/208 600 .50 30 10” N/A 0.8 1/5 3 208 600 .50 35 10” 13.3 N/A 0.8 1/5 3 208 600 .50 20 10” 51182/38386 62.5/54.1 60A + 30A 1.5 1/4 1 240/208 900 .50 90 14” 10/7.5 34121/25591 41.7/36.1 N/A 1.5 1/4 1 240/208 900 .
Dimensional Drawings 05/21/2019 4 EI914
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.
Installation Overview This Make-Up Air unit contains interface/logic devices, one current transformer (CT doughnut), inlet and outlet temperature sensors, power open/power close damper, permanent washable filter and blower 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.
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. When using CT doughnut, use Class II low voltage wiring methods to connect CT to Make-Up Air unit. 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).
Horizontal installation – Ceiling Mount: Horizontal installation – Wall Mount: Option A: Cover Facing Down Option B: Cover Facing Side 05/21/2019 8 EI914
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Electrical Installation Diagrams below represent general installation requirements. Due to various model sizes available, actual unit mechanical and wiring requirements will vary dependent upon specific model. Low Voltage Wiring Temperature Sensors Two temperature sensors are included, one used to sense inlet air temperature, the other to sense supply or outlet air temperature. Without proper installation of these probes the Make-Up Air unit will not operate correctly.
Control Wiring There are two “tie-in” options available in connecting the Make-Up Air unit to a vent hood or other venting equipment. Option 1 – Connect an isolated “dry” switch or relay contact to the R & W terminal block (TB1).
High Voltage Vent Hood Lighting Note: For multi-speed vent hood installations, consideration must be made with vent hoods that include higher wattage lighting. It is possible that the low speed trigger point of the fan is equal to or lower than the current draw of the integrated lighting in the vent hood itself. In this case, the CT must be installed at the motor in the vent hood minus the lighting. WARNING DO NOT RETURN SOURCE POWER TO UNIT UNTIL CT SECONDARY IS TERMINATED AT CONTROL BOARD.
4. Example – required three wraps, means the wire must go through the CT, loop back around, and then loop back around the second time through before it’s terminated at its original connection point. 5. The phasing or direction through the CT is not critical, simply one continuous wire. 6. The secondary side of the CT (pigtail wires) is connected at terminal block (TB2). a. CT black wire, connect to either: i. TB2-2, TB2-4 or TB2-6 b. CT red wire, connect to either: i. TB2-1, TB2-3 or TB2-5.
High Voltage Wiring Service Panel Circuit Breaker(s) Sizing – based upon unit size, the specification page shows appropriate service size requirements based on UL and NEC code. Note: Larger models include factory provided circuit breaker(s). This qualifies as a local disconnect at the product. 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.
Basic Setup & Configuration Control Board Configuration Temperature Set Point – Located on the back of the control board is a dial labeled “SET POINT”. This dial is used to set the desired output temperature. Setting the desired output temperature is completed in three steps. See Figure 1 for temperature ranges. Step 1 – Determine the required temperature output for the application. o HINT: Most Make-Up Air applications suggest an output set point typically around 50°F (10°C).
Fahrenheit/Celsius Selection – Labeled “°F °C” (J22). This jumper allows for selection of degrees Fahrenheit or Celsius to be displayed on the display. NOTE: Factory default is °F. A power down reset is required upon changing of this jumper. Blower Speed Adjustment – the blue adjustment dial allows for fine tuning the blower speed. If you do not need full CFM of your application and desire a larger temperature rise, the blower speed can be reduced with this adjustment dial.
Software Configuration Software Setup Based on Specific Application – Multiple applications exist for this product. The unit is shipped preprogrammed for a range of applications with the ability to be reprogrammed to meet others. Below are the most prevalent applications.
Understanding the Product Display SELECT Scroll through available options during installation and setup. DISPLAY NEXT Select available onscreen options during field installation and setup. STATUS LED Indicates whether or not a message is available: Solid = No message available – status good Pulsing = Message available Note: If pulsing, press and hold select button.
Normal Operation Screens Under normal operating conditions, there are two screens that may be displayed based on system activity. Screen one – Idle screen – displayed when the unit is off. FAN OFF Screen two – Active screen – displayed when the unit is on.
Multi-Speed Setup If your application includes a multi-speed blower, follow the setup steps in this section. Step 1 Enter into “MULTI-SPD SETUP” mode: Press and hold “SELECT” and “NEXT” for 5 seconds FAN OFF Step 2 Select “NEXT” to begin “MULTI-SPD SETUP” (select HOME to return) MULTI-SPD NEXT HOME Turn on vent hood to its highest setting, then press “NEXT” Step 3 SET EXT BL – HI PRESS NEXT NOTE: If display reads: ERROR: 1 = 0.
Set vent hood to medium speed “if applicable”, then press “NEXT” Step 5 SET EXT BL = MED PRESS NEXT If vent hood has a low speed select Y, if not select N Step 6 LO SPD Y N Set vent hood to low speed “if applicable”, then press “NEXT” Step 7 SET EXT BL = LO PRESS NEXT Press “NEXT” after vent hood has been shut off Step 8 TURN OFF EXT BL PRESS NEXT 05/21/2019 21 EI914
Operational Indicators LED Monitor Lights Green LED – is a representation of low voltage control power. Green LED ON = good 24VAC power and fuse is in good working condition. Green LED OFF = Fuse open or no 24VAC from transformer (or primary source breaker open). Red LEDs – there are 4 red LEDs on the control, each LED represents a stage of electric heating elements.
Start Up Inspection & Observations Entering Air Temperature: Heating is locked out when entering air temperature is greater than 55°F (12.7°C). Blower Delay/Control – At the end of a cycle, the blower continues to run for approximately 30 seconds to cool off the electric elements. Depending upon inlet temperature, outlet temperature set point, and/or larger kW unit size; a power outage while the unit is in operation could cause the manual reset temperature limit control to open.
Advanced Installation & Special Equipment Concerns Override Electric Element Staging, “E” Tab Input – during an active call, spade terminal labeled “E” (T7) can be jumpered to R (24VAC HOT) to bring on all four electric element stages and bypass any temperature sensing or stage modulation functions. However, the > 55°F (12.7°C) disable still applies. NOTE: Does not apply to models with no electric heat.
External Damper, Field Furnished and Installed: Preparation or Pre-Wiring Sequence 1. Power up the Make-Up Air unit. 2. Jumper “R” and “W” screw terminal block (control board upper right). 3. Fan/blower will turn on and the internal damper will open. Observe the opening of the internal damper. 4. With the internal damper open, disconnect all three wires. Separate, do not allow the gray wire to touch either brown or violet wires. 5. Turn off the unit power and remove jumper at “R” and “W” terminal block.
Troubleshooting 1. This product contains several interference suppression components, but as an electronic logic product unpredictable and unusual transients or interferences may sometimes cause strange results. If this product is “acting strange”, turn off the source power, count to 10, and reenergize. 2. Terminal blocks are clamp-down type. If there is no wire connected and the screw is loose, the screw may not necessarily make a good electrical contact to the inside components.
Troubleshooting Display is blank and nothing is turning on Solution Unit is not producing heat Unit is not delivering adequate warm air temperature The “Status LED” is blinking 05/21/2019 This unit includes a 2A fuse located on the control board, verify it is in good working condition. If 2A fuse is open, replace. If 2A fuse is not open, check the primary and secondary side of the transformer to ensure power is available.
Troubleshooting The blower is not turning on Solution The blower runs in “high speed” only The blower runs in “MED speed” only The blower runs in “LOW speed” only Condensation or frost buildup on cabinet or ductwork Check unit display. Display should show “FAN OFF” or temperature screen. If screen is blank, check 2A fuse. If screen displays the “FAN OFF” screen, unit is not being told to turn on.
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DECAL + TITLEBLOCK DO NOT PRINT AS DECAL
DECAL + TITLEBLOCK DO NOT PRINT AS DECAL
DECAL + TITLEBLOCK DO NOT PRINT AS DECAL
DECAL + TITLEBLOCK DO NOT PRINT AS DECAL
DECAL + TITLEBLOCK DO NOT PRINT AS DECAL
DECAL + TITLEBLOCK DO NOT PRINT AS DECAL
Electro Industries, Inc. Residential Limited Product Warranty Effective November 1, 2009 Electro Industries, Inc. warrants to the original owner, at the original installation site, for a period of two (2) years from date of original purchase, that the product and product parts manufactured by Electro Industries, Inc.
CONDITIONS AND LIMITATIONS: 1. This warranty is limited to residential, single family dwelling installations only. Any commercial or multi-unit dwelling installations fall under the Electro Industries Commercial Limited Product Warranty. 2. Electro Industries, Inc. shall not be liable for performance related issues resulting from improper installation, improper sizing, improper duct or distribution system, or any other installation deficiencies. 3.
