RenewAire EV SERIES Premium ERV

Safety Precautions

⚠️ CAUTION: RISK OF ELECTRIC SHOCK OR EQUIPMENT DAMAGE
Always disconnect power to the ERV and its controls before connecting, disconnecting, or changing electrical wiring. Lock and tag the disconnect switch or circuit breaker to prevent accidental reconnection of electric power.

⚠️ CAUTION: RISK OF CONTACT WITH HIGH SPEED MOVING PARTS
The appliance contains high-speed fans that can cause injury or damage if objects contact the spinning impellers. Fans may be controlled by external devices and switch on unexpectedly. Ensure electric power to the unit is disconnected when working near the fans.

⚠️ CAUTION: RISK OF INJURY FROM FALLING OBJECTS
Installation requires hoisting hardware overhead and working beneath heavy objects. Observe all OSHA-approved work practices and wear appropriate Personal Protective Equipment (PPE).

ℹ️ IMPORTANT
All ductwork must be designed and installed according to SMACNA guidelines. This ERV is intended for ducted ventilation only, requiring ducting at least 40 inches [1 meter] in length on all four airstreams.

ℹ️ IMPORTANT
Only trained and authorized personnel should access the ERV electrical box and controller. Controller changes must be made by trained and authorized personnel only.

ℹ️ IMPORTANT
Installation must follow industry best practices and all applicable codes. Damage caused by improper installation practices will void the warranty.

Owner Information

NOTICE: This manual includes space for recording operating settings at the time of unit commissioning. See Sections 5.1 and 5.2. Make copies of these pages if documenting multiple ERVs.

UNIT INFORMATION
Record the model and serial numbers from the RenewAire unit label (located outside the appliance, near the terminal block). This information is crucial for factory assistance.

ERV Model: [Space for Model Number]

Serial Number: [Space for Serial Number]

The unit is ETL Listed and certified to UL STD 1812 and CAN/CSA C22.2 No. 113.

Table of Contents

• 1.0 Overview (Description, Operating Modes, Unit Weights)
• 2.0 Component Description (Cabinet, Fans, Controller, Ducts, Enthalpic Core, Filters, Controls Terminal Strip)
• 3.0 Unit Placement (Mounting, Service Clearances, Power Source, Load Bearing Capacity)
• 4.0 Installation (Materials, Electric Service Entry, Low-Voltage Entry, Attaching Ducts, Airflow Settings, Balancing, Wiring Schematics)
• 4.9 Damper Operation (Continuous and Intermittent Installation)
• 5.0 Operation (Manometer Readings, Airflow Readings, Conversions)
• 6.0 Maintenance (Filter Replacement, Core Vacuuming, Duct Inspection, Recalibration, Door Removal)
• 7.0 Troubleshooting (Indications, Noise, Airflow Issues)
• 8.0 Factory Assistance

1.0 OVERVIEW

The EV Premium ERVs are multi-speed, air-to-air energy recovery ventilators designed for residential applications with flexible installation options (floor joists or wall mounting). Models S, M, L, and X include an integral 34" line cord for 120VAC plug-in, while models SH, MH, LH, and XH require hard-wiring.

The ERV exhausts stale Return Air (RA) while transferring latent and sensible energy to the incoming fresh Outdoor Air (OA) via a static plate heat exchanger core. Airstreams do not mix. Each unit uses a 120V EC fan with airflow capacities ranging from 30-130 CFM (S/SH), 30-225 CFM (M/MH), 30-280 CFM (L/LH), and 100-390 CFM (X/XH).

Airflow can be set to Continuous or Boost modes, adjustable via potentiometers and controlled by optional sensors or devices. Balanced airflow is recommended for optimal energy recovery. The unit features a hinged door with an access/viewing port for potentiometer adjustment and is lined with 1" thick foil-backed foam insulation.

Diagram Description (Figure 1.2.0 EV Premium Cutaway View): Illustrates the internal components and airflow paths. Key components shown include the Electrical Box, Interlock Switch, Supply Air Fan, Exhaust Air Fan, Air Filters, Enthalpic Core, and duct connections for Outside Air (OA), Supply Air (SA), Return Air (RA), and Exhaust Air (EA).

2.0 COMPONENT DESCRIPTION

2.1 CABINET

Constructed from 22-gauge galvanized steel, painted white. Features a hinged, removable door, four air pressure test ports, a low-voltage terminal strip, an access/viewing port, and locations for four duct connectors (6" or 8").

2.1.1 Removable Door with Interlock Switch

The insulated door has separable hinges and two securing latches. An access/viewing port allows potentiometer adjustment. A pressure-sensitive interlock switch behind the door cuts power if the door is opened during operation. Four air pressure test ports are located on the door for measurements.

2.2 FANS

Two high-efficiency, electronically commutated (EC) 120VDC variable speed fans are used: one for intake (OA/SA) and one for exhaust (RA/EA). Fan speeds are independently controlled by a 0-10VDC signal from the controller.

2.3 CONTROLLER

The controller signals the EC motors via integral potentiometers. Line voltage powers the fans, and a step-down transformer provides 24VAC to the low-voltage terminal strips. Four user-adjustable potentiometers set fan speeds for each mode.

2.3.1 Controller Power Supply

A 24VAC terminal strip is located on the unit end. The control board provides up to 12VA (approx. 0.5A) for optional control accessories.

2.4 DUCTS

Airstream Terminology:

• Outside Air (OA): External atmosphere air.
• Supply Air (SA): Air downstream of the core, supplied to the occupied space.
• Conditioned Air (CA): Air supplied to an occupied space.
• Return Air (RA): Air returned from a conditioned space to a heating/cooling appliance.
• Exhaust Air (EA): Air removed from a heating/cooling appliance and discharged.

Units include four field-installable duct connectors for 6" or 8" round ducts (S/SH, M/MH, L/LH) or 8" flexible/oval rigid duct (X/XH). Short, straight duct runs are preferred. Follow SMACNA guidelines for duct installation. Rigid ducting is preferred over flexible for lower airflow resistance.

Typically, four duct runs are used:

• OA Duct: Provides clean outdoor air, usually capped with an air inlet cap and bird screen. Wall intakes should be at least 10' from appliance vents or plumbing drainage vents, and 10' from exhaust fan discharge outlets (unless the outlet is 3' or more above the intake).
• EA Duct: Exhausts stale air outdoors, typically ending at an exterior wall exhaust cap.
• SA Duct: Delivers fresh, conditioned air to the residence, ending in a floor or wall grate (min. 28 sq. in. area) or connected to the main HVAC system's return or supply air duct. If connected to the return air duct, it must be at least 3' from the return plenum.
• RA Duct: Collects indoor air from return grilles, passes it through the core, and directs it for exhaust.

Insulation: Ducts connected to the outside within a building require insulation with a sealed vapor barrier (R-value of at least R-6, R-8 recommended). For unconditioned spaces (attics, crawl spaces), all four ducts must be insulated.

Diagram Descriptions:

• Figure 2.4.0 Airstream Illustration: Shows the basic flow of OA, SA, RA, and EA through the unit.
• Figure 2.4.1 Separate Return Air Pick-up: Illustrates connecting SA to the furnace return air trunk and RA from a separate pick-up.
• Figure 2.4.2 Separate Return Air and Supply Air: Shows separate RA and SA connections.
• Figure 2.4.3 Furnace Return Air Back into Return Air: Depicts RA from the furnace connecting to the unit's RA duct. Requires furnace fan operation.
• Figure 2.4.4 Furnace Return Air Back into Supply Air: Depicts RA from the furnace connecting to the unit's SA duct. Requires furnace fan operation.

Notes: ERV blowers can operate independently of the furnace blower. Caution is advised when introducing fresh air at low velocity to avoid drafts.

2.5 ENTHALPIC CORE

Features a static-plate, cross-flow core that separates incoming and outgoing airstreams while transferring total energy (heat and water vapor). Airstreams do not mix.

2.6 FILTERS

Equipped with mesh-type, anti-microbial MERV 8 filters on OA and RA sides. The OA filter can be replaced with an optional MERV 13 pleated paper filter. Filters are not to be cleaned; they must be replaced every three months or more frequently if needed.

Diagram Description (Figure 2.6.0 EV Premium Filter Locations): Shows the placement of the OA filter (protects core and filters incoming air) and RA filter (protects core from return air dust).

2.7 CONTROLS TERMINAL STRIP

Located on the unit end, providing a 24VAC connection for Boost mode or accessories. Includes terminals for High Speed, Common, Damper, and 24VAC. Also shows a 120VAC line cord connection for S, M, L, X models.

Diagram Description (Figure 2.7.0 Controls Terminal Strip): Labels the terminals for various control and power connections.

3.0 UNIT PLACEMENT

RenewAire recommends installation by a professional HVAC installer for proper air stream balancing. The unit can be installed by one person.

3.1 MOUNTING THE UNIT

The unit can be installed in any orientation, but horizontal is preferred for easier door access for filter changes and core cleaning. Mounting can be done on concrete foundation walls or stud walls using appropriate anchors and brackets. Foam tape is used for vibration dampening. Safety screws are recommended. For suspending from floor joists or trusses, use the hanging bracket and integral flange.

Diagram Description (Figure 3.1.0 Mounting the ERV to a Stud Wall): Illustrates mounting hardware and placement on a wall stud.

Notes: The door has slide-off hinges for convenience. Avoid overtightening screws to prevent vibration transfer. Wall brackets require support from two wall studs; use a plywood panel if necessary.

3.2 SERVICE CLEARANCES

Ensure sufficient space for the door to open at least 90° for access to latches and components.

3.3 AC POWER SOURCE

• EV Premium S, M, L, X: Require 120VAC, 3.0 amps (S, M, L) or 5.5 amps (X). Have an integral 34" power cord. A grounded 120VAC outlet is required nearby.
• EV Premium SH, MH, LH, XH: Require 120VAC, 3.0 amps (SH, MH, LH) or 5.5 amps (XH). Must be hard-wired by the installer, following local codes. A disconnect switch may be required.

3.4 LOAD BEARING CAPACITY OF SUPPORTS

The ERV must be attached to structural members like joists, beams, or wall studs. Support from fixtures like ductwork or air handlers is not permitted unless approved by a design engineer.

4.0 INSTALLATION

⚠️ CAUTION: RISK OF INJURY FROM FALLING OBJECTS
Use proper hoisting hardware and PPE during installation.

4.1 USER-SUPPLIED INSTALLATION MATERIALS

Recommended materials include a duct hoist, medium-strength thread-lock, UL-181-rated duct mastic, pliers, drill, screwdriver bits, and a stud finder.

4.2 FACTORY-RECOMMENDED ELECTRIC SERVICE ENTRY

• EV Premium S, M, L, X: Plug the 34" factory-installed line cord into a 120V receptacle.
• EV Premium SH, MH, LH, XH: Hard-wire through the unit's 2" x 2" junction box, which has knockouts for 1/2" metal conduit. The junction box can be remounted for knockout positioning.

4.3 FACTORY-RECOMMENDED LOW-VOLTAGE SERVICE ENTRY

All low-voltage connections are made on the exterior terminal strip; no field wiring enters the unit.

4.4 ATTACHING DUCTS

Fabricate and install ducts per SMACNA guidelines. Use zip ties, UL-181-rated duct mastic, and screws for secure attachment. Observe industry best practices.

4.5 SELECTING AIRFLOW SETTINGS

Consult the RenewAire website (renewaire.com/how-to-buy/home-ventilation-solutions/) for basic airflow volume recommendations based on square footage and bedrooms. Boost mode can be tied to usage patterns (e.g., bathrooms). An HVAC professional should be consulted for optimal settings. Airflow is adjusted using potentiometers on the unit door, referencing pressure readings and charts in Section 5.2.1.

4.6 BALANCING AIRFLOWS

EV Premium ERVs allow for balanced or slightly unbalanced airflows. A slight excess of OA may reduce air infiltration. Some homes may require imbalance due to furnace/water heater venting. An HVAC professional can advise on balance settings. Balancing involves setting OA fan speed and adjusting RA fan speed to match or slightly lower the OA exhaust.

Equipment Required: Magnehelic gauge or manometer (0-1.0 inches water gauge), two pieces of 1/8" I.D. latex tubing.

Differential static pressures (DP) are measured across the core and filters using the installed pressure ports.

Note: Airflow volumes can be adjusted as needed. Re-balancing is recommended after any changes.

Diagram Description (Figure 4.6.0 Pressure Port Locations): Shows the locations of pressure ports for OA and RA airstream measurements.

Note: Adjust low-speed settings with 'L' marked potentiometers and high-speed settings with 'H' marked potentiometers.

Diagram Description (Figure 4.6.1 Fan Speed Control Potentiometers): Illustrates the location of adjustable potentiometers accessible through the unit door.

4.7 WIRING SCHEMATICS

Provides diagrams for both line cord (115VAC, 1 Phase) and hard-wired installations, detailing connections to the control board, SF and EF motors, door kill switch, and external controls.

Diagram Description (Figure 4.7.0 EV Premium Wiring Schematic): Shows the wiring for a unit with a line cord.

Diagram Description (Figure 4.7.1 EV Premium Hard-wired Wiring Schematic): Shows the wiring for a hard-wired unit.

4.8 LOW-VOLTAGE WIRING DIAGRAMS

• 4.8.1 Single Speed Mode CONTINUOUS: Unit runs constantly at low speed. Adjust OA/RA low-speed potentiometers for desired airflow.
• 4.8.2 Low Speed CONTINUOUS/High Speed SWITCHED: Unit runs at low speed continuously and switches to Boost (high speed) via an external control device connected to the 24VAC and High Speed terminals.
• 4.8.3 Single Speed Mode SWITCHED (Intermittent): Unit operates only when activated by an external control device connected to the 24V and High Speed terminals. Low-speed potentiometers should be turned fully counterclockwise.

Diagram Description (Figure 4.8.0 Low-Voltage Wiring Diagram 1): Illustrates connecting a PBT or PTL control for switched operation.

Note: Do not connect PBT wires to the COM terminal.

4.9 DAMPER OPERATION

Optional MD-Series 24-volt dampers can be wired to prevent outdoor air from being pulled through the ERV via the HVAC fan when connected to a ducted return. Refer to the MD series damper manual for details.

4.9.1 Damper installation for Continuous ERV Operation: Wire damper to 24VAC and COM terminals. Damper opens with power, closes when power is lost.

Diagram Description (Figure 4.9.0 Low-Voltage Wiring Diagram 2): Shows damper wiring for continuous operation.

4.9.2 Damper Installation for Intermittent ERV Operation: Wire damper to DAMP and COM terminals. Unit operates and damper opens when High Speed terminal is activated.

Diagram Description (Figure 4.9.1 Low-Voltage Wiring Diagram 3): Shows damper wiring for intermittent operation with a PBT or PTL control.

5.0 OPERATION

5.1 MANOMETER READINGS AT COMMISSIONING

Record pressure readings for Return Air, Exhaust Air, Outside Air, and Supply Air ports, along with calculated Pressure Drops.

Fields:

• Return Air Pressure Port: In. w.g.: ______, Pressure Drop: ______
• Exhaust Air Pressure Port: In. w.g.: ______, Pressure Drop: ______
• Outside Air Pressure Port: In. w.g.: ______, Pressure Drop: ______
• Supply Air Pressure Port: In. w.g.: ______, Pressure Drop: ______

5.2 AIRFLOW READINGS AT COMMISSIONING

5.2.1 Conversion of Pressure Drop to Airflow

Use the following formulas and tables to convert pressure drop readings (in inches w.g.) to airflow in CFM, depending on filter type (MERV 8 or MERV 13).

Formulas for MERV 8 Filters:

• EV Premium S/SH: [Airflow in CFM] = 183 x [Pressure Drop in inches w.g.]
• EV Premium M/MH: [Airflow in CFM] = 283 x [Pressure Drop in inches w.g.]
• EV Premium L/LH: [Airflow in CFM] = 593 x [Pressure Drop in inches w.g.]
• EV Premium X/XH: [Airflow in CFM] = 593 x [Pressure Drop in inches w.g.]

Formulas for MERV 13 OA Filters:

• EV Premium S/SH: [Airflow in CFM] = 154 x [Core Pressure Drop in inches w.g.]
• EV Premium M/MH: [Airflow in CFM] = 235 x [Core Pressure Drop in inches w.g.]
• EV Premium L/LH: [Airflow in CFM] = 487 x [Core Pressure Drop in inches w.g.]
• EV Premium X/XH: [Airflow in CFM] = 487 x [Core Pressure Drop in inches w.g.]

Table: Pressure Drop to Airflow Conversions

5.2.2 Continuous Mode (low speed): Record Outdoor Airflow: ______ CFM, Return Airflow: ______ CFM.

5.2.3 Boost Mode (high speed): Record Outdoor Airflow: ______ CFM, Return Airflow: ______ CFM.

6.0 MAINTENANCE

ℹ️ IMPORTANT: Unit is for use after building construction completion, not during.

The primary maintenance is filter replacement. Filters are mesh-type, anti-microbial MERV 8 and must be replaced, not cleaned. Optional MERV 13 pleated paper filters can be used for the OA filter post-construction. Replace all filters every three months or more frequently based on air quality.

The enthalpic core should be vacuumed annually using a soft-bristled nozzle. Ducts should be inspected annually for damage, contaminants, or leaks.

6.1 MAINTENANCE AFTER 30 DAYS OPERATION

Check and tighten all mounting and support hardware. Inspect filters for cleanliness, as construction dust may have accumulated.

6.2 RECALIBRATION OF AIRFLOWS

Recalibrate fan speed potentiometers if the heating system is reconfigured, structural changes occur, or MERV 13 filters are installed.

6.3 DOOR REMOVAL

To remove the door, disconnect power, unlatch the door, and slide it off its hinges.

6.4 SERVICE PARTS

Key service parts include the Core, Draw Latch, Hanging Bracket, Filter, Door, Filter Clip, Interlock Switch, Electrical Box Assembly, Impeller, and Duct Collar.

Diagram Description (Figure 6.4.0 EV Premium Service Parts): An exploded view showing the main components of the unit for service purposes.

7.0 TROUBLESHOOTING

⚠️ CAUTION: Many troubleshooting steps involve high voltage. Use appropriate PPE (gloves, safety glasses, head gear) and take precautions against electric shock.

7.1 INDICATION OF PROBLEM

Verify that fresh air is not being delivered. Check air filters for cleanliness and proper position. Perform a hard restart (unplug for several seconds, then plug back in). Check ducting and airflow at nearest vents. Test both low and high speed settings.

7.2 EV PREMIUM HAS AIRFLOW BUT IS MAKING NOISE

Check for fan vibration. Imbalance or bad bearings can cause noise. Rotate impellers by hand to ensure they spin freely. Clean impellers if dusty. If noise persists, a fan bearing may be faulty.

7.3 NO APPARENT AIRFLOW FROM THE EV PREMIUM

Verify power. Trace power supply if none. If unit has power but fans don't run, check disconnect switch. Listen for fan noise and feel for vibration. Check filters for cleanliness. Inspect ducts for obstructions, kinks, or disconnections. Check outdoor vent louvers. If only one fan runs, check fan connectors.

7.4 INADEQUATE OR REDUCED AIRFLOW FROM THE EV PREMIUM

Use a manometer to check pressure differential across the core (Section 4.6). Compare readings to initial installation settings. Check low and high speed settings via terminal strip jumpers (Section 4.7). Inspect ducts for bends, blockages, or leaks.

7.5 EV PREMIUM FAILS TO RUN IN EITHER LOW SPEED OR HIGH SPEED MODE

Modes operate independently. Isolate the issue by bypassing the controlling device. Remove wiring from the terminal strip, check operation without jumpers, then test with a jumper from 24VAC to High Speed terminal.

7.6 NO APPARENT REASON FOR LOW AIRFLOW

Reset fan potentiometers using instructions in Section 4.6, restoring settings to original CFM values recorded in Section 5.1.

8.0 FACTORY ASSISTANCE

For assistance, have Unit Information (model, serial number) ready. Contact RenewAire Customer Service by calling 800-627-4499 or emailing RenewAireSupport@RenewAire.com.

About RenewAire

For over 40 years, RenewAire has pioneered indoor air quality (IAQ) solutions. Their fifth-generation, static-plate, enthalpic-core Energy Recovery Ventilators (ERVs) optimize energy efficiency, reduce capital costs, and lower operational expenses. RenewAire ERVs are competitively priced, easy to install, use, and maintain, offering a quick payback and industry-leading warranty. As the largest ERV producer in the USA, RenewAire is committed to sustainable manufacturing, with its Waunakee, WI plant powered by wind turbines and LEED® Gold certified. RenewAire is part of the Soler & Palau (S&P) Ventilation Group, providing access to advanced air-moving technologies. For more information, visit renewaire.com.

Address: 201 Raemisch Road | Waunakee, WI | 53597

Phone: 800.627.4499

Website: RenewAire.com