valent ERC-M Energy Core Ventilator Instruction Manual

valent ERC-M Energy Core Ventilator

Product Information

Specifications

• Model: ERC-M
• Product: Energy Core Ventilator
• Installation, Operation and Maintenance Manual: Document 486437

General Safety Information
Only qualified personnel should install this system. Personnel should have a clear understanding of these instructions and should be aware of general safety precautions. Improper installation can result in electric shock, possible injury due to coming in contact with moving parts, as well as other potential hazards. Other considerations may be required if high winds or seismic activity are present. If more information is needed, contact a licensed professional engineer before moving forward.

DANGER
Always disconnect power before working on or near this equipment. Lock and tag the disconnect switch or breaker to prevent accidental power-up.

CAUTION
When servicing the unit, the internal components may be hot enough to cause pain or injury. Allow time for cooling before servicing.

CAUTION
Precaution should be taken in explosive atmospheres.

Additional Safety Instructions:

1. Follow all local electrical and safety codes, as well as the National Electrical Code (NEC), and the National Fire Protection Agency (NFPA), where applicable. Follow the Canadian Electrical Code (CEC) in Canada.
2. All moving parts must be free to rotate without striking or rubbing any stationary objects.
3. The unit must be securely and adequately grounded.
4. Do not spin the fan wheel faster than the maximum cataloged fan RPM. Adjustments to fan speed significantly affect motor load. If the fan RPM is changed, the motor current should be checked to make sure it is not exceeding the motor nameplate amps.
5. Do not allow the power cable to kink or come in contact with oil, grease, hot surfaces, or chemicals. Replace the cord immediately if damaged.
6. Verify that the power source is compatible with the equipment.
7. Never open access doors to the unit while it is running.

Product Usage Instructions

Unit Overview
The Energy Core Ventilator is designed for both summer and winter operations to precondition outdoor air before it is mixed with return air for final conditioning by the air handler.

Summer Operation
During summer operation, the energy recovery core transfers energy from the cooler, drier return air to the outdoor air, decreasing its temperature and moisture levels. The preconditioned outdoor air is then mixed with return air and sent back to the air handler for final conditioning.

Diagram:

Winter Operation
During winter operation, the energy recovery core transfers energy from the warmer, more humid return air to the outdoor air, increasing its temperature and moisture levels. The preconditioned outdoor air is then mixed with return air and sent back to the air handler for final conditioning.

Diagram:

Receiving and Handling
When receiving and handling the Energy Core Ventilator units, follow these guidelines:

• Rig and move units using the lifting brackets provided or by the skid when a forklift is used.
• Handle the unit in a manner that prevents scratching or chipping the coating. A damaged finish may reduce the ability of the unit to resist corrosion.

FAQ (Frequently Asked Questions)

• Q: Who should install the Energy Core Ventilator?
  A: Only qualified personnel should install this system. Personnel should have a clear understanding of the instructions and be aware of general safety precautions.

• Q: What should I do before servicing the unit?
  A: Allow time for cooling before servicing as the internal components may be hot enough to cause pain or injury.

• Q: What precautions should be taken in explosive atmospheres?
  A: Precaution should be taken to ensure safety in explosive atmospheres.

• Q: Can I adjust the fan speed?
  A: Do not spin the fan wheel faster than the maximum cataloged fan RPM. Adjustments to fan speed significantly affect motor load, and if the fan RPM is changed, the motor current should be checked to ensure it is not exceeding the motor nameplate amps.

Installation, Operation and Maintenance Manual
Please read and save these instructions for future reference. Read carefully before attempting to assemble, install, operate or maintain the product described. Protect yourself and others by observing all safety information. Failure to comply with these instructions will result in voiding of the product warranty and may result in personal injury and/or property damage.

Technical Support
Call 1-800-789-8550

General Safety Information

Only qualified personnel should install this system. Personnel should have a clear understanding of these instructions and should be aware of general safety precautions. Improper installation can result in electric shock, possible injury due to coming in contact with moving parts, as well as other potential hazards. Other considerations may be required if high winds or seismic activity are present. If more information is needed, contact a licensed professional engineer before moving forward.

• DANGER
  Always disconnect power before working on or near this equipment. Lock and tag the disconnect switch or breaker to prevent accidental power up.

• CAUTION
  When servicing the unit, the internal components may be hot enough to cause pain or injury. Allow time for cooling before servicing.

• CAUTION
  Precaution should be taken in explosive atmospheres.

1. Follow all local electrical and safety codes, as well as the National Electrical Code (NEC), the National Fire Protection Agency (NFPA), where applicable. Follow the Canadian Electrical Code (CEC) in Canada.
2. All moving parts must be free to rotate without striking or rubbing any stationary objects.
3. Unit must be securely and adequately grounded.
4. Do not spin fan wheel faster than maximum cataloged fan RPM. Adjustments to fan speed significantly affects motor load. If the fan RPM is changed, the motor current should be checked to make sure it is not exceeding the motor nameplate amps.
5. Do not allow the power cable to kink or come in contact with oil, grease, hot surfaces or chemicals. Replace cord immediately if damaged.
6. Verify that the power source is compatible with the equipment.
7. Never open access doors to the unit while it is running.

Unit Overview

Summer Operation
Outdoor air is preconditioned (temperature and moisture levels are decreased) by the transfer of energy from the cooler, drier return air through the energy recovery core. The preconditioned air is typically mixed with return air going back to the air handler for final conditioning.

Winter Operation
Outdoor air is preconditioned (temperature and moisture levels are increased) by the transfer of energy from the warmer, more humid return air through the energy recovery core. The preconditioned air is typically mixed with return air going back to the air handler for final conditioning.

Receiving, Handling, Storage

Receiving
This product may have been exposed to road salt during transit. If so, immediately wash off all visible white residue from all exterior surfaces. Upon receiving the product, check to ensure all items are accounted for by referencing the delivery receipt or packing list. Inspect each crate or carton for shipping damage before accepting delivery. Alert the carrier if any damage is detected, do not refuse shipment. The customer shall make notation of damage (or shortage of items) on the delivery receipt and all copies of the bill of lading should be countersigned by the delivering carrier. If damaged, immediately contact your manufacturer’s representative. Any physical damage to the unit after acceptance is not the responsibility of the manufacturer.

Handling
Units are to be rigged and moved by the lifting brackets provided or by the skid when a forklift is used. Location of brackets varies by model and size. Handle in such a manner as to keep from scratching or chipping the coating. Damaged finish may reduce the ability of unit to resist corrosion.

Unpacking
Verify that all required parts and the correct quantity of each item have been received. Inspect the interior of the unit cabinet for any shipped loose items. If any items are missing, report shortages to your local representative to arrange for obtaining missing parts. Sometimes not all items for the unit may be shipped together due to the availability of transportation and truck space. Confirmation of shipment(s) must be limited to only items on the bill of lading.

Storage
Units are protected against damage during shipment. If the unit cannot be installed and operated immediately, precautions need to be taken to prevent deterioration of the unit during storage. The user assumes responsibility of the unit and accessories while in storage. The manufacturer will not be responsible for damage during storage. These suggestions are provided solely as a convenience to the user. The ideal environment for the storage of units and accessories is indoors, above grade, in a low-humidity atmosphere that is sealed to prevent the entry of blowing dust, rain, or snow. Units designed for outdoor applications may be stored outdoors. All accessories must be stored indoors in a clean, dry atmosphere.

Indoor
Maintain temperatures evenly to prevent condensation. Remove any accumulations of dirt, water, ice, or snow and wipe dry before moving to indoor storage. To avoid condensation, allow cold parts to reach room temperature. Leave coverings loose to permit air circulation and to allow for periodic inspection.

The unit should be stored at least 3½ in. (89 mm) off the floor. Clearance should be provided to permit air circulation and space for inspection.

Outdoor
The unit should be placed on a level surface to prevent water from leaking into the unit. The unit should be elevated so that it is above water and snow levels. Ensure sufficient support to prevent unit from settling into soft ground. Locate parts far enough apart to permit air circulation, sunlight, and space for periodic inspection. To minimize water accumulation, place all unit parts on blocking supports so that rain water will run off. Do not cover parts with plastic film or tarps as these cause condensation of moisture from the air passing through heating and cooling cycles.

Inspection and Maintenance
While in storage, inspect units once per month. Keep a record of inspection and maintenance performed. If moisture or dirt accumulations are found on parts, the source should be located and eliminated. At each inspection, rotate the fan wheel by hand ten to fifteen revolutions to distribute lubricant on motor. If paint deterioration begins, consideration should be given to touch- up or repainting. Units with special coatings may require special techniques for touch-up or repair.

Machined parts coated with rust preventive should be restored to good condition promptly if signs of rust occur. Immediately remove the original rust preventive coating with petroleum solvent and clean with lint-free cloths. Polish any remaining rust from surface with crocus cloth or fine emery paper and oil. Do not destroy the continuity of the surfaces. Wipe thoroughly clean with Tectyl® 506 (Ashland Inc.) or the equivalent. For hard-to-reach internal surfaces or for occasional use, consider using Tectyl® 511M Rust Preventive, WD-40® or the equivalent.

Removing from Storage
As units are removed from storage to be installed in their final location, they should be protected and maintained similarly until the equipment goes into operation.

Prior to installing the unit and system components, inspect the unit assembly to make sure it is in working order.

1. Check all fasteners, set screws on the fan, wheel, bearings, drive, motor base, and accessories for tightness.
2. Rotate the fan wheel(s) by hand and assure no parts are rubbing.

Dimensional Data and Weights

All dimensions are in inches.

Service Clearances and Access Panel Locations

Recommended Service Clearances

• The ERC-M requires minimum clearances to perform routine maintenance, such as filter replacement, energy core cleaning and fan inspection. Fan and motor assemblies, energy recovery core, and filter sections Model Inches are provided with a service 20 door or panel for proper component access.
• When mounted on its side, the ERC-M only requires access on one side of the unit. It is recommended that access is kept on the electrical input side.
• Minimum service clearance should be provided on the side of the unit for routine service and component removal should it become necessary.
• If the unit is to be mounted on its side (Reference the Mounting Options sections of this IOM), then service clearance should be on the electrical input side.

Access Panel Locations

• Outdoor and exhaust fans, and motor
• Electrical connection
• Energy core and internal filters

Intake and Discharge Locations

The ERC-M comes standard with end connections. The option for configurable intake and discharge connections (shaded in below drawing) are available and can be interchanged based on application in the field.

Changing the Discharge Location

• Step 1 – Disconnect and lock out all power switches.
• Step 2 – Remove the sheet metal block from the desired discharge location.
• Step 3 – Cut the insulation from the desired discharge location opening.
• Step 4 – Remove the backdraft damper from its current position and reinstall in the desired discharge location. The hinged door should be on the discharge end of the unit.
• Step 5 – Glue the cutout insulation to the sheet metal block. Install where the damper had been located.
• Step 6 – Using a 1/2-inch wrench, remove the four (4) bolts from the discharge end of the unit that holds the blowers.
• Step 7 – Remove the four (4) plastic plugs from the desired discharge location and reinstall the plastic plugs in the holes where the bolts were removed from in Step 6.
• Step 8 – Position the blowers to line up with the desired discharge location. The motor needs to be on the discharge end of the blower and unit. If the motor is positioned on the return side of the blower/unit, the motor/blower will interfere with the energy recovery core. The blower adjacent to the control center needs to be rotated 90°. The blower not adjacent to the control center needs to be flipped and rotated such that the motor is now opposite the control center side of the unit. It may be necessary to unwire the motors.
• Step 9 – Bolt the blowers in their desired locations. Securely reconnect and fasten all wires.

Changing the Inlet Location

• Step 1 – Remove the metal cover for the optional inlet location by unfastening the four (4) sheet metal screws holding it in place.
• Step 2 – Hand bend flanges out to form a duct collar in the newly uncovered intake opening.
• Step 3 – Cut insulation.
• Step 4 – Hand bend flanges in on the original intake and replaces the metal cover removed in Step 1.

Installation

IMPORTANT
The ERC-M unit can be hung in any orientation. The installation contractor is responsible for safely mounting the unit to provide appropriate removal or access to the panels and unit components.

• The system design and installation should follow accepted industry practices, such as described in the ASHRAE Handbook and SMACNA.
• As standard, the ERC-M is to be mounted in a horizontal orientation but can also be mounted on its side or a vertical position.

Hang Mounting with Hanging Vibration Isolators

• The hanging isolator kit includes four (4) isolators and required hardware.
• Locate the support rods as shown in the drawing.
• Assemble each isolator as shown below.

Base Mounting with Base Vibration Isolators

• The base isolators kit includes four (4) isolators, four (4) brackets and required hardware.
• Assemble and mount the isolators as shown in the figures below.

Ductwork Connections
Examples of poor and good fan-to-duct connections are shown. Airflow out of the fan should be directed straight or curve the same direction as the fan wheel rotates. Poor duct installation will result in low airflow and other system effects.

Recommended Discharge Duct Size and Length

• Recommended duct sizes are based on velocities across the airflow range of each model at approximately 800 feet per minute (PM) at minimum airflow and up to 1600 fpm at maximum airflow. Recommended duct sizes are only intended to be a guide and may not satisfy the requirements of the project. Refer to plans for appropriate job-specific duct size and/or velocity limitations.
• Straight duct lengths were calculated based on 100% effective duct length requirements as prescribed in AMCA Publication 201. Calculated values have been rounded up to a nearest foot.

Electrical Connections

• Before connecting power to the unit, read and understand the following instructions and wiring diagrams. Complete wiring diagrams are attached inside the blower door of the unit.

• All wiring should be done in accordance with the National Electrical Code ANSI/NFPA 70 latest edition and any local codes that may apply. In Canada, wiring should be done per the Canadian Electrical Code. The equipment must be properly grounded.

• CAUTION
  If any of the original wire must be replaced, the replacement wire must have a temperature rating of at least 105ºC.

• DANGER
  High voltage electrical input is required for this equipment. This work should be performed by a qualified electrician.

Electrical Connection Location

All dimensions are in inches.

Sequence for Wiring Unit

1. The unit’s nameplate contains the voltage and total amperage required. The wire supplying power to the unit should be sized accordingly.
2. The main power line should be connected to the appropriate terminal blocks. Power may be routed to the unit through the opening on the underside of the unit. The locations for the opening are provided in the figure above.
3. Refer to the wiring diagrams in this manual or in the unit for controlling the unit.

Frost Control
Extremely cold outdoor air temperatures can cause moisture condensation and frosting on the energy recovery core. Frost Control is a selectable timer control that will prevent frosting. Frost control uses a Therm-O-Disc P/N: 314886 T-O-D 60T11 (L15-10F) mounted in the outdoor air intake compartment. Thermo-O-Disc has pre-set temperature of 5°F and uses the normally closed contacts; contacts open on temperature rise. Use the test procedure for troubleshooting.

Frost Control Test Procedure

1. Remove power from unit.
2. Jumper the temperature indicating Therm-O-Disc in the unit control center. Therm-O-Disc has a pre-set temperature of 5ºF.
3. Set the frost control timer scale for T1 and T2 to 5m. Set the timer settings for T1 and T2 to 0.
4. Add power to the unit. Blower should cycle on for 5 minutes, then turn off for 5 minutes.
5. Remove power from unit and remove jumpers that were placed. Re-set timer settings.
   • T1 timer ON setting set to 5 for 30 minutes of wheel on time.
   • T2 timer OFF setting set to 0 for 5 minutes of wheel off time.

Timer Settings:

T1 ON Timer

• 0 = 5 MIIN
• 1 = 10 MIN
• 2 = 15 MIN
• 3 = 20 MIN
• 4 = 25 MIN
• 5 = 30 MIN (default)
• 6 = 35 MIN
• 7 = 40 MIN

T2 OFF Timer

• 0 = 5 MlN (default)
• 1 = 10 MIN
• 2 = 15 MIN
• 3 = 20 MIN
• 4 = 25 MIN
• 5 = 30 MIN
• 6 = 35 MIN
• 7 = 40 MIN

Control Components
Verify that all of the following parts and hardware have been received prior to beginning installation. Contact your local representative or the manufacturer if replacement parts are required.

• NOTE: Additional parts (provided by others) may be required to complete the control installation, including additional wiring and hardware for mounting the control to the building structure.
• NOTE: See following page for diagram of control components.

Mounting & Wiring

HOA Controller Mounting

ERV Control PCB GPN: 387192

HOA Wiring

Specifications

ERV Specifications

• AC Input Power
  1115Vac, 230Vac, 277Vac 50/60 Hz.

• Motor and Aux Input

  • 115Vac — 208Vac Input, 50/60 Hz.
  • 230Vac — 277Vac Input, 60/60 Hz.

• Motor Output

  • QTY (2) 115Vac 8.8FLA 3/4HP
  • QTY (1) Wheel Motor 115Vac 0.75 FLA

• Remote ON Input
  Provide a close contact between TB2-1 and TB2-2 will active the ERV Controller.

• Sensor Remote Power
  +24Vdc Pin 3 of TB2 and GND Pin 4 of TB2 is available for source powering sensors. (Maximum 100ma).

• Frost Control
  Extremely cold outdoor air temperatures can cause moisture condensation and frosting on the energy recovery wheel. Frost Control timer is a selectable timer control that will prevent control wheel frosting. Frost control uses a Therm-O-Disc P/N: 314886 T-O-D 60T11 (L15-10F) mounted in the outdoor air intake compartment. Thermo-O-Disc has pre-set temperature of 5°F and uses the normally closed contacts; contacts open on temperature rise. Use the test procedure for troubleshooting.

Remote Thermostat/Therm-O Disc Input:
Wire between Pins 5 and 6 of TB2.

Timer Settings:

T1 ON Timer

• 0 = 5 MIIN
• 1 = 10 MIN
• 2 = 15 MIN
• 3 = 20 MIN
• 4 = 25 MIN
• 5 = 30 MIN (default)
• 6 = 35 MIN
• 7 = 40 MIN

T2 OFF Timer

• 0 = 5 MlN (default)
• 1 = 10 MIN
• 2 = 15 MIN
• 3 = 20 MIN
• 4 = 25 MIN
• 5 = 30 MIN
• 6 = 35 MIN
• 7 = 40 MIN

Single Mode Speed Control
Place the SW2 slide switch on the ERV PCB in a Single position. Provide a 0- 10Vdc command signal to Pin 7 (-) and Pin 8 (+) of TB2. This will control the speed of both A and B motors.

Dual Mode Speed Control
Place SW2 slide switch on ERV PCB to the dual mode. Provide a 0-10Vdc command signal to Pin 7 (-) and Pin 8 (+), of TB2 for speed control of Motor A. Provide another 0-10V command signal to Pin 9 (-) and Pin 10 (+) of TB2 for speed control of Motor B.

Inlet/Outlet Motor Swap
In the event the Inlet and Exhaust vents are swapped, slide SW1 switch on ERV PCB A and B motors to reverse.

• Agency Approval: UL E479135

Conditions of Acceptability

1. ERV Controller must be mounted in a suitable end-use enclosure.
2. Load motors rated 3/4HP shall be R/C (XDNW2) Electronically Protected Motor with Locked Rotor Protection.

Operation

IMPORTANT:
Ensure all wiring is complete before applying power to the ERV controller.

Check Voltage
Before starting the ERV Controller, compare the supplied voltage with the unit’s nameplate voltage and the motor voltage.

Initial Setup

1. Apply power to the ERV controller.

2. Remote ON: To turn ‘’ON” the ERV Controller, provide a close contact between Pins 1 and 2 of TB2 on ERV PCB. The Green LED will illuminate when activated {“ON”)

3. Validate Motor operation: With Remote “ON” activated, verify Energy Wheel, Inlet and Exhaust motors are functioning.
   Note: If the A or B motor is “OFF”, check the following:

   • Frost control may be activated depending on the Thermostat input Pins 5 and 6 of TB2.
   • 0-10Vdc Speed control settings are too low. From 0-1.9V, the A and B motor(s) will be off and will operate within the 2-10V range.

4. Validate inlet and Outlet (Exhaust) motor operation with the setting of SW1 on the ERV Controller. Make sure SW1 is in the correct position A or B. If the Inlet and Outlet (Exhaust) are reserved, simply slide SW1 switch on the ERV PCB to the opposite position. This will swap Inlet and Outlet motors without re-wiring.

5. If +24Vdc is required for Remote sensor power, , validate +24Vdc between Pins 3 and Pin 4 (GND) of TB2. (Maximum 100ma).

HOA Troubleshooting

ERV Troubleshooting Guide

Symptoms| Potential Issues| Fix

Unit is NOT operating

| ¦ Loss of Input Power

¦ Incorrect wiring

¦ Green LED is not illuminated for Remote ON

¦ No contact closure between Pins 1 & 2 of TB2 for Remote “ON”

| ¦ Check Breaker

¦ Check input power Wiring

¦ Validate correct Input Power to Terminal Block TB1

¦ Validate a short between Pins 1 & 2 of TB2 for Remote “ON”

¦ Validate Green LED is illuminated for Remote ON

Energy Wheel Motor does not turn ON

| ¦ No contact closure between Pins 1 & 2 of TB2 for Remote “ON”

¦ Validate Motor wiring to W5 and W6 (1/4”) Spade Faston tabs on ERV Controller

| ¦ Validate Motor Wiring

¦ Validate Green LED on ERV Controller is illuminated “ON”

¦ Energy Wheel is stuck and is not free. Turn the energy recovery wheel by hand to verify free operation

¦ Replace motor

A Motor does not turn ON

| ¦ No contact closure between Pins 1 & 2 of TB2 for Remote “ON”

¦ Validate Motor wiring to W3 and W4 (1/4”) Spade Faston tabs on ERV Controller

¦ Validate speed potentiometer is above

2.0Vdc

| ¦ Validate Motor Wiring

¦ Validate 0-10V Motor command Voltage at Motor. Motor command voltage must be> than 2.00V

¦ Validate Frost control is not activated. Check SW1 Inlet/Outlet switch

B Motor does not turn ON

| ¦ No contact closure between Pins 1 & 2 of TB2 for Remote “ON”

¦ Validate Motor wiring to W1 and W2 (1/4”) Spade Faston tabs on ERV Controller

¦ Validate speed potentiometer is above

2.0Vdc

| ¦ Validate Motor Wiring

¦ Validate 0-10V Motor command Voltage at Motor. Motor command voltage must be> than 2.00V

¦ Validate Frost control is not activated Check SW1 Inlet/Outlet switch

No Frost Control

| ¦ Validate Thermostat Wiring Pins 5 and 6 of TB2

¦ Validate Blue LED is Illuminated

¦ Inlet and Exhaust vents are swapped simply slide SW1 switch on ERV PCB A and B motors to reverse setting

| ¦ Validate Frost control is not activated.

¦ Validate SW1 Inlet/Outlet switch is set correctly.

¦ Validate Timers T1 and T2 for correct settings.

No remote +24V Sensor Power

| ¦ Check wiring to Pins 3 and 4 of TB2.

¦ Measure Voltage at Pins 3 and 4 of TB2 for +24Vdc

| ¦ Check input power Wiring

¦ Validate correct Input Power to Terminal Block TB1

¦ Remove wires at Pins 3 and 4 of TB2 and measure the voltage for +24Vdc. If

+24Vdc is measured, there is too much current draw (sensor can be damaged or drawing too much power) Check Breaker

System Start-Up

• DANGER
  Electric shock hazard. Can cause injury or death. Before attempting to perform any service or maintenance, turn the electrical power to the unit to OFF at the disconnect switch(es). The unit may have multiple power supplies.

• CAUTION
  Use caution when removing access panels or other unit components, especially while standing on a ladder or other potentially unsteady base. Access panels and unit components can be heavy and serious injury may occur.

• CAUTION
  Do not operate without the filters installed. They prevent the entry of foreign objects such as leaves, birds, etc.

• CAUTION
  Do not run the unit during the construction phase. Damage to internal components may result in and void warranty.

• WARNING
  Do not jump any safety devices when operating the unit. This may damage components within or cause serious injury or death.

SPECIAL TOOLS

• Voltmeter
• Incline manometer or equivalent
• Tachometer
• Amperage meter

Every installation requires a comprehensive start-up to ensure the proper operation of the unit. As part of that process, the following checklist must be completed and information recorded. Starting up the unit in accordance with this checklist will not only ensure proper operation but will also provide valuable information to personnel performing future maintenance. Should an issue arise that requires factory assistance, this completed document will allow unit experts to provide quicker resolution. Qualified personnel should perform start-up to ensure safe and proper practices are followed.

Unit Documentation Record

• Unit Model No. __
• Unit Serial No. ____
• Start-Up Date ____
• Start-Up Personnel Name _____
• Start-Up Company ____
• Phone Number ___

Pre-Start-Up Checklist

• Disconnect and lock out all power switches
• Remove any foreign objects that are located in the energy recovery unit.
• Check all fasteners, set screws, and locking collars on the fans, bearings, drives, motor bases, and accessories for tightness.
• Rotate the fan wheels by hand to ensure no parts are rubbing.
• Confirm the EC motor voltage is correct. Reference unit wiring diagram.
• Filters can load up with dirt during building construction. Replace any dirty pleated filters and clean the aluminum mesh filters in the intake hood (refer to Routine Maintenance section).
• Verify that non-motorized dampers open and close properly.
• Check the tightness of all factory wiring connections.
• Verify control wire gauge (refer to the Electrical Connections section).

Start-Up Checklist
The unit will be in operational mode during start-up. Use necessary precautions to avoid injury. All data must be collected while the unit is running. In order to measure volts & amps, the control center door must be open, and the unit energized using a crescent wrench to turn the disconnect handle.

• General
  Check all fasteners and set screws for tightness. This is especially important for bearings and fan wheels. Also, if dampers are not motorized, check that they open and close without binding.

• Check Voltage
  Before starting the unit compare the supplied voltage with the unit’s nameplate voltage and the motor voltage.

• Check the Blower Wheel Rotation
  First, hand-rotate the blower to ensure that the wheel is not rubbing against the scroll. If the blower is rotating in the wrong direction, the unit will move some air but not perform properly.
  To check the rotation, open the blower access panel, and run the blower momentarily to determine the rotation.

• Air Volume Check and Measurement

  • Along with the building balance, the unit’s airflow (cfm) should be measured and compared with its rated air volume. The unit is directly driven, therefore balancing dampers or speed controls are required for airflow balancing.
  • Air volume measurement must be conducted with access doors on the unit.
  • The most accurate way to measure the air volume is by using the pitot traverse method in the ductwork away from the blower. Other methods can be used, but should be proven and accurate.
  • To adjust the air volume, change the fan rpm or the system static pressure.
  • With all access panels on the unit, compare measured amps to the motor nameplate full load amps and correct if they overlap.

• Measure Motor Voltage, Amperage, and Fan RPM

  • With all access panels installed, run the measurement leads through the electrical access hole in the bottom access panel of the unit. Measure and record the input voltage and motor amperage(s).
  • Compare measured amps to the motor nameplate full load amps and correct if overlapping.

Routine Maintenance

WARNING
Disconnect all electrical power to the ERC-M before inspection or servicing. Failure to comply with this safety precaution could result in serious injury or death. Improper installation, adjustment, alteration, service or maintenance can cause property damage, injury, or death. Read the installation, operating, and maintenance instructions thoroughly before installing or servicing this equipment.

• After the ERC-M has been put into operation, an annual inspection and maintenance program should be set up to preserve reliability and performance.
• The energy recovery ventilator requires very little maintenance. However, small problems left unchecked, over time, could lead to loss of performance or early motor failure. We recommend that the unit be inspected once a year.

Fasteners and Set Screws
Any fan vibration tends to loosen mechanical fasteners. A periodic inspection should include checking all fasteners and set screws for tightness. Particular attention should be paid to set screws attaching the fan wheel to the shaft. Loose bearing set screws will lead to premature failure of the fan shaft.

Removal of Dust and Dirt
The fan motor and wheel(s) should be checked for dust and dirt accumulation. Dirt buildup clogs cooling openings on the motor housing and causes motor overheating. Dirt buildup can contaminate bearing lubricant and collect on fan wheel blades causing loss of performance or premature failure. Cleaning can be accomplished by brushing off any dust that may have accumulated. Under no circumstances should motors or bearings be sprayed with steam or water. Even filtered units can accumulate build-up and should be checked when cleaning filters. Maintenance to these components is achieved through the provided access panels.

Internal Filter Maintenance
Opening the access panel provides access to the two-inch deep, pleated MERV 8 (30% efficient) filters. These filters should be checked regularly, cleaned, or replaced as needed.

Model

| Internal Filter Size (in.)|

Quantity

---|---|---
ERC-M1| 15 x 20| 2
ERC-M2| 20 x 20| 2

Energy Recovery Core

Fiber Membrane

• Frequency of cleaning – A regular cleaning cycle must be established for the energy recovery core to maintain optimum sensible and latent energy transfer. In reasonably clean environments such as schools, offices or retail stores, the energy recovery core should be inspected annually and cleaned as needed. Failure to follow a regular cleaning cycle for the energy recovery core can result in significant energy transfer performance losses.
• Accessing the energy recovery core – Disconnecting the power to the unit. Remove the access panel.
• Removing the energy recovery core – Once the energy core access doors are removed, the core can be pulled from the housing. To replace the core, reverse the procedure.
• Recommended cleaning procedure – Once the core is removed, gently vacuum the surfaces of the core to remove the dirt and debris that has accumulated.

Polymer Membrane

• Frequency of cleaning – A regular cleaning cycle must be established for the energy recovery core to maintain optimum sensible and latent energy transfer. In reasonably clean environments such as schools, offices or retail stores, the energy recovery core should be inspected annually and cleaned as needed. Failure to follow a regular cleaning cycle for the energy recovery core can result in significant energy transfer performance losses.
• Accessing the energy recovery core – Disconnecting the power to the unit. Remove the access panel.
• Removing the energy recovery core – Once the energy core access doors are removed, the core can be pulled from the housing. To replace the core, reverse the procedure.
• Recommended cleaning procedure – Once the core is removed, ensure that the plates are orientated in a way for proper draining. Use low-pressure tap water to clean the core. If the core is extremely dirty, use a mild detergent such as Dawn® in a solution of no more than 1:100 parts soap to water.

WARNING

• Do not use a high-pressure water source (pressure washer) or harsh, corrosive detergents. This will result in a damaged core and will not be covered by the warranty.
• The energy core shall not be subjected to temperatures greater than 140ºF. This will result in a damaged core and will not be covered by warranty.

Standard Components

Vari-Green® Electronically Commutated Motor

Features

• Soft Start – All motors feature soft-start technology which eliminates inrush current at start-up. The motors will reliably start at any speed setting.
• Overload Protection – If the motor becomes overloaded, it will automatically reduce its speed until it is no longer overloaded. This means that the motor will never operate in the “service factor” which is possible with many AC motors.
• Locked Rotor Protection – If the motor ever encounters a locked-rotor scenario, the motor will automatically shut itself down. It will try to restart up to 3 times and if after the 3rd time the motor will still not rotate, the motor will not attempt to start again until power is cycled.
• Thermal Protection – The motors will have internal thermal protection which electronically regulates the RPM limit until an acceptable temperature is met.

Operation and Wiring
These motors can accept a plug-in potentiometer for speed adjustment AND the ability to accept a 0-10V signal for remote control.

• Motor Potentiometer – Turn the dial with your fingers to adjust. To increase the speed, rotate the dial clockwise. To decrease the speed, rotate the dial counterclockwise. Turning the dial full counterclockwise will turn the motor off.
• 0-10 Vdc Signal – From 0-1.9V, the motor will be off and will operate within the 2-10V range. This motor does not require 24V power for operation.

Dampers
Gravity backdraft dampers are always included at the discharge positions.

Troubleshooting

Unit is NOT operating

| Electrical| Check fuses/circuit breakers, and replace them if needed. Check for On/ Off switches. Check for the correct supply voltage.
Motor| Check motor horsepower is correct and not tripping overloads.
Excessive noise| Fan wheel rubbing on the inlet| Adjust the wheel and/or inlet cone. Tighten the wheel hub or bearing collars on the shaft.
Bearings| Replace defective bearing(s). Lubricate bearings. Tighten collars and fasteners.
Wheel out of balance| Clean, replace, or rebalance.
Low airflow (cfm)| Fan speed too low| Increase fan speed.
Dirty filters or energy core| Replace filters and/or follow the cleaning procedures.
High static pressure| Incorrect fan-to-duct connections. Make sure dampers open appropriately. Increase fan speed
High airflow (cfm)| Fan speed too high| Decrease fan speed.
Low static pressure| Make sure grilles, filters and access doors are installed. Decrease fan speed.

Always provide the unit model and serial number when requesting parts or service information. Always check motor amps and compare to nameplate rating.

Maintenance Log

Contact Us

Technical Support and Service

• 800-789-8550
• support@doas.com
• Valent Dedicated Outdoor Air Systems 60–28th Avenue North Minneapolis, MN 55411
• Main: 612-877-4800

More Information

Unit Schematics
For configuration and connection questions, see the schematics that shipped with your unit. They can typically be found attached to the main control panel door.

Mechanical and Controls Manuals
Find current mechanical and controls manuals here: www.valentair.com/resources.

© 2023 Valent
Continuous product improvement is the policy of Valent; therefore, product functionality and specifications are subject to change without notice. For the most recent product information visit the product website.

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