RenewAire EV450IN Energy Recovery Ventilator

About RenewAire

For over 30 years, RenewAire has been a pioneer in enhancing indoor air quality (IAQ) in commercial and residential buildings of all sizes. This is achieved while improving sustainability through fifth-generation, static-plate enthalpic-core, Energy Recovery Ventilators (ERVs) that maximize energy efficiency, lower capital costs via load reduction and decrease operational expenses by minimizing equipment needs, resulting in significant energy savings. RenewAire ERVs are competitively priced, simple to install, easy to use and maintain, and offer a quick payback. They also benefit from the industry's lowest warranty claims due to long-term reliability derived from innovative design practices, expert workmanship, and Quick Response Manufacturing (QRM).

As the first manufacturer of static-plate energy recovery ventilators in North America, RenewAire presently has over 180,000 units in operation and is now one of the largest ERV companies in the USA. RenewAire is committed to sustainable manufacturing and lessening its environmental footprint. Its Madison, WI plant is 100% powered by wind turbines and is LEED-, Green Globes-certified, and has achieved ENERGY STAR Building status. In 2010, RenewAire joined the Soler & Palau (S&P) Ventilation Group to provide direct access to the latest in HVAC technologies. For more information, visit: www.renewaire.com.

EV450IN Information

Table of Contents

• EV450IN Info: Pages 2-4
• Installation: Pages 5-14
• Start-up: Pages 15-16
• Maintenance: Pages 17-18

EV450IN Configuration Chart

The EV450IN model number is configured using a series of codes to specify standard and optional features. The chart details each position in the model number, such as Model, Core type, Indoor/Outdoor configuration, Wall Type, Phase, Voltage, Horsepower, Unit Control, Disconnect type, and various Options.

Example Configuration: EV450 J I N - S 1 5 E A N - T -

Key to Configuration:

• 1-5 MODEL: "EV450"
• 6 CORE: "J" = G5
• 7-8 INDOOR/OUTDOOR: "IN"
• WALL TYPE: "S" = SINGLE, "D" = DOUBLE
• PHASE: "1" = SINGLE-PHASE, "3" = THREE-PHASE
• VOLTAGE: "1" = 115V, "4" = 460V, "5" = 208-230V, "9" = 277V
• FA HORSEPOWER: "-" = STANDARD EV450 MOTORS, "E" = EC DIRECT DRIVE MOTORS
• EA HORSEPOWER: (Refer to specific model details)
• UNIT CONTROL: "A" = STANDARD UNIT CONTROL WIRING, "G" = TERMINAL STRIP FOR EC MOTORS
• DISCONNECT: "N" = NON-FUSED (STANDARD), "F" = FUSED
• OPTION 1: 24V TRANSFORMER "T" = TR (TRANSFORMER WITH ISOLATION RELAY)
• OPTION 4: OTHERS "-" = NONE, "W" = WHITE PAINT, "C" = CUSTOM PAINT, "X" = CUSTOM UNIT
• SAFETY LISTING: "L" = LISTED, "N" = NON-LISTED

Restrictions: Specific voltage and phase combinations are noted, as are limitations for ECM motors with single-phase applications.

Specifications

Ventilation Type: Static Plate, Heat and Humidity Transfer

Typical Airflow Range: 200-540 CFM

AHRI 1060 Certified Core: One L85-G5

Number of Motors: One qty., 0.6 hp (Single Phase); One qty., 0.5 hp (Three Phase)

Standard Features: Non-fused Disconnect, 24 VAC Transformer/Relay Package

Filters: Two total, MERV 8, 2" pleated, 14" x 20" nominal size

Weight: 134 lbs (unit), 153 lbs (in carton), 193 lbs (on pallet, up to 3 units on 40 lb pallet)

Shipping Dimensions: 48" L x 41" W x 18" H (in carton); 55" L x 42" W x 22" H (on pallet)

Options: ECM Motor (0.5 hp, Single Phase, 115V or 208-230V), Fused Disconnect, Double Wall Construction.

Accessories: Hanging Bracket/Foot Kit (45EVHB), Rectangular Flange Kit (45EVDF), Round Transition Kit (45EVT10), Wall Caps, Back Draft Dampers, Vibration Isolation Kit (45VIB).

Motor Performance

Core Performance

Note: Airflow performance ratings include the effect of clean, standard filters. Watts is for the entire unit. *At AHRI 1060 standard conditions.

Product Dimensions

The EV450IN unit dimensions are provided for installation planning. The unit can be mounted to a wall using integral flanges or hung from a ceiling using optional kits. Service areas are indicated for access.

Overall Dimensions (approximate):

• Height: Varies based on configuration, case height ~33 7/8"
• Width: Varies based on configuration, case width ~15 7/8"
• Depth: Varies based on configuration, case depth ~26 1/4"
• Overall with flanges: ~47 1/8"
• Overall with round transitions: ~54 1/2"

Service Area Requirements: Minimum 14 1/4" service area clearance for doors and 44 1/2" minimum service area clearance.

Duct Connections: Typically 12" x 8" rectangular or 10" round ports, with optional flange or transition kits available.

Pressure Ports: Four pressure ports are located on the front of the core access doors for airflow measurement.

Electrical Connections: Power and control wiring entry points are indicated on the unit (e.g., 7/8" holes for wiring in the bottom of the E-Box).

Installation Orientation: The unit may be installed in any orientation.

Note: Dimensions are rounded to the nearest eighth of an inch. Specifications are subject to change without notice.

Installation

Placement of the EV450IN

The EV450IN is designed for indoor installation. Select a location central to the inside duct runs and close to both the exhaust duct (to the outside) and the fresh air duct (from the outside). The unit can be installed in any orientation, but the contractor is responsible for safe installation.

To maximize air performance, minimize the number of elbows and avoid placing them within three feet of the EV450IN's discharges. For applications sensitive to duct noise, use noise-attenuating techniques such as duct isolation, insulation, and proper duct design per SMACNA or ASHRAE standards.

Planning Your Installation

Ducts to the Outside

The EV450IN requires four ducts: Exhaust Air Duct, Outside Air Duct, Room Air Duct, and Fresh Air Duct. Ducts connecting to the outside must be insulated with a sealed vapor barrier on both inside and outside of the insulation or use closed-cell foam insulation. Recommended duct types are 8" X 12" insulated duct or 10" I.D. flexible insulated duct.

The exhaust outlet and fresh air inlet on the outside of the building should be at least ten feet apart to avoid cross-contamination. The exhaust outlet should not dump air into an enclosed space or any other structure. Inlets and outlets should be screened against insects and vermin and shielded from weather.

Using Flex Duct to Connect EV450IN to Outside: Use the optional Duct Adapter Kit (45EVT10) or fabricate equivalent for 10" flexible insulated duct. Ensure continuous vapor barrier. Keep insulated duct runs short and direct, and suspend or support ducts per manufacturer's instructions.

Caution: Tape inner and outer vapor barriers of insulated duct to collars on duct adapters and wall caps to prevent moisture migration. Seal any tears.

Caution: Do not vent exhaust duct up through the roof. Slope duct slightly downhill to a horizontal-discharge wall cap to allow condensate to drain outside.

Note on Preventing Rain Entry:

• Inlet hood velocity should not exceed 500 fpm.
• Inlet duct must be at least 12" inside diameter.
• Centerline length along duct from weather hood to unit inlet must be at least 48".
• Centerline of inlet hood must be at least 18" below the centerline of the unit inlet.
• Outlet duct must pitch downward to the outside with a slope of at least 1/4" per foot.

Applications: See Figure F2 for common installation approaches.

Inside Ductwork System

Use optional 8" X12" to 10" round transitions (45EVT10) or equivalent to connect 10" duct to Room Air and Fresh Air Ports. Position duct adapters over openings and install with screws. Alternatively, use an 8" X 12" duct flange (45EVDF) or fabricate equivalent. Ensure an airtight seal with appropriate duct sealant or tape.

Note: Inside ducts running through unconditioned spaces must be insulated with a sealed vapor barrier. In heated spaces, uninsulated duct is acceptable, but insulated duct offers better noise resistance.

For ventilating multiple spaces, evaluate if air is regularly mixed by the HVAC system. If not, provide a room air pick-up and fresh air supply in each space.

Connecting to an Existing Air-Circulation System

Connecting the Fresh Air duct to a return duct of an existing heating/cooling system is effective. This ensures fresh air distribution whenever the system is running. Connect the Fresh Air duct to a branch return duct away from the air handler to minimize unintended air draw.

Ducting Fresh Air Directly into Space: Locate Fresh Air supplies where they will not blow directly on occupants, especially in cold or hot weather.

Installation Warnings and Cautions

Warning: Risk of Fire, Electric Shock, or Injury. Observe all codes and follow safety guidelines.

• Disconnect power before servicing. Lock-out/tag-out the unit.
• Installation work and electrical wiring must be done by qualified professionals.
• Comply with all applicable building, health, and safety codes.
• Unit must be grounded.
• Ensure sufficient air for combustion and exhausting of gases from fuel-burning equipment.
• If exhausting air from a space with chimney-vented fuel-burning equipment, ensure combustion air supply is not affected.
• Use the unit only as intended by the manufacturer.
• This unit is for general ventilation only. Do not use to exhaust hazardous or explosive materials. Do not connect to range hoods, fume hoods, or collection systems for toxics.
• Avoid damaging electrical wiring and hidden utilities when cutting or drilling.
• Unit must be properly ducted to the outdoors.

Sound Attenuation:

• Outside the Building: Size exhaust duct and grille for less than 1000 fpm air velocity. Orient exhaust air hood away from public areas.
• Ducts: Ensure ductwork at unit outlets is stiff to resist booming. Use smooth, straight transitions from ERV outlets to ducts.
• Radiated Noise: Insulate FA and EA ducts for sound control, starting at the unit and extending at least ten feet. Insulate all parts of FA and EA ducts in mechanical spaces.
• Aerodynamic (Velocity) Noise: Velocity noise at the Fresh Air blower outlet is a primary concern. Average velocity is 1100 FPM at 600 CFM.

Wiring Schematics

The manual provides wiring schematics for both single-phase (EV450 P1) and three-phase (EV450 P3) units. These illustrate field-wired power supply connections, transformer connections, and control device wiring.

Control Device: 24VAC power is available between the Red and Blue leads to power external control devices. Do not interconnect the unit's Class 2 Power Supply with an external power supply.

Low-Voltage Control System: The ERV provides a Class II 24VAC power supply for the unit's contactor and can power external controls (up to 8VA). An isolation relay allows use of external controls with contact ratings as low as 50mA (1.2VA).

Circuit Breaker: A built-in circuit breaker protects low-voltage components from short-circuits or overloads. The transformer is designed to fail safely in extreme cases.

Specifications: Nominal Output Voltage: 24VAC. Circuit Breaker Trip Point: 3A.

Caution: Connect only to components intended for 24VAC power. Do not undersize low-voltage wires. Do not overload the 24VAC power supply (max 8VA). If using an external 24VAC source, consult schematics and connect only to specified terminals. Connect only CLASS II power to control terminals.

Wire Length and Gauge Limits: Tables are provided to ensure reliable operation of the control system based on wire gauge (#22 to #12) and circuit length (100' to 1000').

Control Wiring Examples:

• A. Single 2-wire Control: For controls requiring no power (simple on/off switch). Connect blue lead to one yellow lead. Connect control contacts to red lead and remaining yellow lead.
• B. Control Sending 24VAC from External Source: Cap blue and red leads. Apply 24VAC to the two yellow leads to operate the isolation relay.
• C. Control Operating on Unit's 24VAC Power Supply: Connect one yellow lead to the blue lead. Connect the switched output of the control to the red lead to operate the isolation relay.

Caution: Ensure external control system does not draw more than 8VA.

Mounting the Unit

The EV450IN weighs approximately 135 lbs. Ensure fasteners are properly selected for loads and substrates to prevent the unit from falling or tipping.

Mounting Options:

• Integral flanges for wall mounting (Figure 1).
• Hanging from a ceiling using integral flanges (Figure 2).
• Optional vibration isolator kit (45VIB) for hanging.
• Optional hanging bracket kit (45EVHB) for ceiling mounting or floor mount legs (Figure 3 & 4).

Note: Threaded rod, bolts, nuts, or other fasteners are not included. Hanger bolts or threaded rod must be 3/8" diameter minimum.

Caution: Do not stand on the unit. Do not stack items on the unit. Keep unit clean from construction dust to avoid motor bearing damage.

Door Keepers: Rubber door keepers (Figures 7 & 8) must be removed to open doors.

Start-Up

Measuring Air Flow

Equipment Required: Magnehelic gauge or similar device (0-1.5 in. water differential pressure), 2 pieces of natural rubber latex tubing (1/8" ID, 1/16" Wall).

Cross Core Static Pressure Measurement:

• Use installed pressure ports on the front of the core access doors.
• To read SCFM of Fresh Air (FA): Connect the "high" pressure side of the gauge to the Outside Air (OA) port and the "low" pressure side to the Fresh Air (FA) port.
• To read SCFM of Room Air (RA): Connect the "high" pressure side of the gauge to the Room Air (RA) port and the "low" pressure side to the Exhaust Air (EA) port.
• Use the measurement device reading to cross-reference CFM output using the conversion chart.

Note: Ensure tubing is well seated in pressure ports and extends approximately 1 inch. Replace port caps after measurement.

Caution: Ensure clean filters are installed before balancing airflow.

Airflow Balance: For best performance, Fresh Air and Exhaust Air rates should be roughly equal ("balanced"). The unit can operate with up to 20% imbalance without significant loss in energy recovery efficiency.

Differential Static Across Core vs. CFM Table: Provides differential static pressure (DSP) values for Fresh Air (FA) and Room Air (RA) at various CFM outputs.

Filter Specifications

• The unit is supplied with two 14" x 20" x 2" (nominal) pleated filters, actual size 13.5" x 19.5" x 1.75".
• Filters are MERV-8; minimum recommended effectiveness is MERV-6.
• Graphs show initial pressure drop for MERV-8 and optional MERV-13 filters.

Note: Pressure drop of standard filters is included in unit airflow performance tables.

Maintenance

Service Parts

The diagram illustrates key serviceable parts of the EV450IN unit, including the Motor Blower Assembly, Core, Filters, Transformer, Contactor, Circuit Breaker, Relay, Disconnect, Voltage Adapter, Wire Harness, Latch, Hinge Set, Bumper, and Filter Door/Blower Door.

Requirements

Warning: Disconnect power before servicing. Lock-out/tag-out the disconnect.

Caution: DO NOT WASH THE ENERGY EXCHANGE CORE. Keep it away from water or fire. Handle carefully.

To Clean the Energy Exchange Element

Vacuum the face of the energy exchange element yearly. Dust collects only on the entering face where the filter sits. The interior remains clean.

1. Remove the filters.
2. Vacuum exposed faces of the element with a soft brush attachment.
3. Vacuum dust from the unit case.
4. Install new filters.

Inspect and Change Filters Regularly

Inspect and/or replace filters every two to three months, or as needed. Using filters is crucial to prevent the core from becoming blocked by dust.

1. Unlatch access doors to access filters. Doors may be removed.
2. Pull out dirty filters and replace with new ones.

Note: Supplied filters typically keep the core clear for several months. Finer filters can be used but require more frequent cleaning and must be accounted for in system design due to increased airflow resistance.

Motor Maintenance

The motor requires no lubrication. Annually, vacuum clean the blower wheels when cleaning the energy exchange element face.

Warning: Risk of Injury or Damage. Motor may have a manual reset thermal protector. Disconnect power before servicing. Use caution as the motor may be hot.

If the motor thermal protector trips, correct the overheating cause (e.g., over-amperage, locked rotor). If the manual reset button (red) does not reset, allow the motor to cool completely. You should feel or hear a click when it resets.

Notes

This section is reserved for general notes and additional information not covered elsewhere.

Unmatched Ventilation Support

RenewAire customers can rely on professional support staff for swift, professional assistance with all technical, application, and service needs, anytime and anywhere.

RenewAire focuses exclusively on advanced ventilation solutions. For commercial projects, RenewAire is presented as the expert in HVAC.

Contact Information:

• USA: (800) 627-4499, Fax: (608) 221-2824, 4510 Helgesen Drive, Madison, Wisconsin 53718 USA, www.renewaire.com
• Canada: (905) 475-8989, Fax: (905) 475-5231, www.mitsubishielectric.ca
• Mexico, Central & South America: 52 (222) 2 233 911, Fax: 52 (222) 2 233 914, www.soler-palau.mx