INSTALLATION GUIDE FOR BROAN ERV100S

ABOUT THIS MANUAL

This manual uses specific symbols to emphasize information:

NOTE: Indicates supplementary information needed to fully complete an instruction.

ABOUT THESE UNITS

LIMITATION

For residential (domestic) installation only. Installation work and electrical wiring must be done by qualified person(s) in accordance with all applicable codes and standards, including fire-rated construction codes and standards.

1. TYPICAL INSTALLATIONS

The unit can be hung from joists or ceiling using included brackets or optional chains and spring kit (part no. V61239, sold separately). Bathroom fans and range hoods can exhaust stale air. For multi-level homes, one exhaust register at the highest level is recommended. A standard 3-prong electrical outlet must be available within 3 feet of the unit.

1.1 FOR HOUSE

There are three installation methods for houses:

1.1.1 FULLY DUCTED SYSTEM

Stale air from registers at the highest level is exhausted outdoors. Fresh air from outdoors is filtered and supplied by registers at the lowest liveable level. Multi-level homes require at least one exhaust register at the highest level. This system is primarily for homes with radiant hot water or electric baseboard heating. (Diagram shows a house with ducts connecting to various rooms, exhausting stale air from upper levels and supplying fresh air to lower levels.)

1.1.2 CENTRAL DRAW POINT (CONNECTION TO A FORCED AIR SYSTEM)

Stale air from registers at the highest level is exhausted outdoors. Fresh air from outdoors is filtered and supplied to the return (plenum) or supply duct of the forced air unit. It is not essential for the forced air system blower to run when the unit is in operation, but it is recommended. Homes with multiple forced air systems should have one unit on each system. (Diagram shows a house with ducts connecting to a central forced air system, exhausting stale air from upper levels and supplying fresh air to the return/supply plenum.)

1.1.3 SIMPLIFIED INSTALLATION (CONNECTION TO A FORCED AIR SYSTEM)

Stale air is exhausted outdoors. Fresh air from outdoors is filtered and supplied to the return (plenum) or supply duct of the forced air unit. To avoid cross-contamination and achieve highest efficiencies, the forced air system blower must always be ON. Homes with multiple forced air systems should have one unit on each system. (Diagram shows a house with ducts connecting to a central forced air system, similar to central draw point but emphasizing continuous blower operation.)

1.2 FOR HIGH-RISE DWELLING

1.2.1 FULLY DUCTED SYSTEM (PRIMARILY FOR HOMES WITH RADIANT HOT WATER OR ELECTRIC BASEBOARD HEATING)

Stale air from registers in bathrooms and kitchen is exhausted outdoors. Fresh air from outdoors is filtered and supplied by registers in bedrooms and living room. (Diagram shows a high-rise dwelling layout with ducts exhausting from kitchen/bathrooms and supplying to bedrooms/living room.)

1.2.2 CENTRAL DRAW POINT (CONNECTION TO A FAN-COIL SYSTEM)

Stale air from registers in bathrooms and kitchen is exhausted outdoors. Fresh air from outdoors is filtered and supplied to the supply duct of the fan-coil system unit. It is not essential for the fan-coil system blower to run when the unit is in operation, but it is recommended. (Diagram shows a high-rise dwelling layout with ducts connecting to a fan-coil system, exhausting from kitchen/bathrooms and supplying to the fan-coil unit.)

2. INSTALLATION

2.1 INSPECT THE CONTENTS OF THE BOX

• Inspect the exterior of the unit for shipping damage (door, hinges, power cord).
• Open the unit door and inspect the interior for damage (energy recovery core, core filters, insulation, dampers).

2.2 UNIT PREPARATION

All units have 2 ports with integrated balancing dampers (Fresh air to building and Exhaust air to outdoors ports). Before installation, ensure these ports are in wide open position. If not:

1. Loosen the damper lever locking screw.
2. Use the damper lever to open the damper.
3. Lock the damper in position by tightening the locking screw.

(Diagram shows a damper lever and a screw, indicating how to adjust the damper.)

2.3 LOCATING THE UNIT

Choose an appropriate location:

• Within an area where ambient temperature is between 65°F and 104°F.
• To provide easy access for quarterly and annual maintenance.
• Close to an exterior wall to limit insulated flexible duct length.
• Away from hot chimneys and other fire hazards.
• Allow for a power source within 3 feet (standard 3-prong grounding outlet).

2.4 HOW TO HANG THE UNIT

Hang the unit using 2 included brackets. (Diagram shows a unit being held by its sides.)

1. Mount brackets to ceiling or joists. Use the template printed on the cardboard filler located in the unit box to ease location. Align bracket notches with cardboard filler tabs. Use at least 2 end screws (A) (or nails) per bracket; the center one is optional. (Diagram shows brackets being mounted to joists, with a cardboard filler template for alignment.)
2. Bend 90° integrated hooks (2 places) on the unit. (Diagram shows bending hooks on the unit.)
3. Hang the hooks onto the brackets. (Diagram shows the unit being hung onto the brackets.)
4. Clip the other side of unit onto the brackets (2 places). (Diagram shows the unit fully clipped onto the brackets.)

NOTE: The unit can also be hung using 4 hooks (shaded part in illustration), chains, springs and screws (kit sold separately, part no. V61239). (Diagram shows the unit with four hooks for alternative hanging.)

2.5 PLANNING OF THE DUCTWORK

• Keep it simple: minimum bends and joints.
• Keep insulated ducts to a minimum length.
• Do not ventilate crawl spaces or cold rooms.
• Do not attempt to recover exhaust air from a dryer or range hood (causes clogging).
• If the house has two floors or more, plan for at least one exhaust register on the highest lived-in level.

2.6 INSTALLING THE DUCTWORK AND REGISTERS

2.6.1 FULLY DUCTED SYSTEM

Stale air exhaust ductwork:

• Install stale air exhaust registers where contaminants are produced (kitchen, living room, etc.). Position registers as far from stairway as possible for air circulation in all lived-in spaces.
• Kitchen registers must be at least 4 feet from the range.
• Install registers 6 to 12 inches from the ceiling on an interior wall OR in the ceiling.

Fresh air distribution ductwork:

• Install fresh air distribution registers in bedrooms, dining rooms, living room and basement.
• Locate fresh air registers as far as possible from stale air registers.
• Install registers in the ceiling OR 6 to 12 inches from the ceiling on an interior wall.
• If a register must be floor installed, direct the airflow up the wall.

2.6.2 CENTRAL DRAW POINT SYSTEM

Stale air exhaust ductwork: Same as for Fully Ducted System.

Fresh air distribution ductwork:

Supply side connection:

• Cut an opening into the furnace supply duct at least 18 inches from the furnace/air handler.
• Connect this opening to the Fresh air to building port of the ERV (use steel duct).
• Ensure the ERV duct forms an elbow inside the furnace/air handler ductwork.
• If desired, interlock (synchronize) the furnace/air handler blower operation (see Section 4).

(Diagram shows a steel duct connecting the ERV to the furnace supply duct, with a minimum 18" distance from the furnace/air handler.)

2.6.3 SIMPLIFIED INSTALLATION

Supply-return connection:

Stale air intake:

• Cut an opening into the furnace/air handler return duct not less than 10 feet from the furnace/air handler (A+B).
• Connect this opening to the Exhaust air from building port of the ERV.

Fresh air distribution: Same instructions as Supply side connection, Section 2.6.2.

NOTE: It is not essential to synchronize the furnace blower operation with the unit operation, but we recommend it.

(Diagram shows a steel duct connecting the ERV to both the furnace supply and return ducts, with minimum distances specified.)

2.7 CONNECTING THE DUCTS TO THE UNIT

NOTE: All unit ports are designed for minimum 5" diameter ducts, but can connect to bigger sizes using appropriate transitions.

Insulated flexible ducts:

All units have Fresh air to building and Exhaust air to outdoors ports equipped with integrated balancing dampers. Ensure these are wide open before installing insulated flexible ducts (See Section 2.2).

Procedure for connecting insulated flexible ducts to the unit ports (Exhaust air to outdoors and Fresh air from outdoors ports):

1. Pull back the insulation to expose the flexible duct.
2. Attach the flexible duct to the port using a tie wrap.
3. Pull the insulation over the joint and tuck in between the inner and outer rings of the double collar, then pull down the vapor barrier (shaded part in illustrations below) over the insulation and tuck in between the inner and outer rings.
4. Apply duct tape to the joint (outer ring and vapor barrier) making an airtight seal. Avoid compressing insulation.

(Four diagrams illustrate the steps of connecting flexible ducts: 1. Insulation pulled back, 2. Duct attached with tie wrap, 3. Insulation pulled over joint, 4. Duct tape applied.)

Rigid ducts:

Use a small length (6" length) of flexible duct to connect the rigid duct to the ports to avoid vibration transmissions. Use tie-wraps for connections, then seal with duct tape.

2.8 INSTALLING 2 EXTERIOR HOODS

Choose appropriate location for exterior hoods:

• Minimum distance of 10' between hoods to avoid cross-contamination.
• Minimum distance of 18" from the ground.

Refer to figure for connecting insulated ducts to exterior hoods. An "Anti-gust intake hood" should be installed in regions with a lot of snow. (Diagram shows exterior hoods on a wall, indicating minimum distances between intake and exhaust hoods, and from the ground. It also shows duct connections with tape and tie.)

2.9 INSTALLING A TANDEM® TRANSITION* KIT

If desired, a Tandem transition kit can be used instead of 2 exterior hoods.

• An additional backdraft damper (not included) must be installed on the stale air to outdoors duct following common best practice. If it interrupts insulation, add insulation around it.
• Follow the instructions included with the tandem termination kit.

*Patented.

(Diagrams show two types of Tandem Transition kits: VTYIK1 and V14695.)

3. CONTROLS

The ERV100S unit has an integrated control located under the unit, in front of the electrical compartment. Plug in the unit. (Diagram shows the front of the ERV100S unit with an integrated control panel, highlighting an LED (1) and a push button (2).)

3.1 BOOTING SEQUENCE

The unit booting sequence is similar to a personal computer. Each time the unit is plugged in or after a power failure, it performs a booting sequence before operating.

During booting, the integrated control LED (1) will light up and remain GREEN or AMBER for 3 seconds, then shut off (booting done). Or it will light up in the color of the previous mode if controlled by its integrated control. No command is taken until the unit is fully booted.

If a problem occurs or the unit enters Protection Mode, its LED (1) will blink. The color and pattern depend on the error type or Protection Mode. Refer to the sticker on the unit and Section 9 Troubleshooting for details.

3.2 INTEGRATED CONTROL

Use the push button (2) to control the unit. The LED (1) indicates the unit's mode:

NOTE: When using main control, the integrated control must be turned off.

3.3 SETTING EXTENDED DEFROST

Units are factory set to normal defrost. For cold regions (outdoor temperature -17°F and lower), extended defrost may be necessary. During the first 3 seconds of booting, the integrated control LED shows the current defrost mode:

Within the first 3 seconds of booting, press the push button until the LED blinks, then release. The LED will blink AMBER 5 times, then shut off, then turn RED (unit returns to booting sequence).

3.4 ELECTRICAL CONNECTION TO WALL CONTROLS

The ERV100S unit can be controlled using an optional main control.

NOTES: 1. The integrated control must be turned OFF to use an optional main control. 2. If an optional auxiliary control is used, if activated, this auxiliary control will override the optional main control operation.

Open the unit door. Insert the terminal connector (included in the installation kit) under the unit, on the electrical compartment front face. Use this terminal connector for electrical connection for main and optional wall controls, then secure the cable(s) with a tie wrap. (Diagram shows the terminal connector being inserted and secured with a tie wrap.)

Check if all wires are correctly inserted in their corresponding holes in the terminal block. A wire is correctly inserted when its orange receptacle is lower than another one without wire. Splice back the end of the cable to access the 4 wires. Strip the end of each wire. Connect each wire to its corresponding terminal: YELLOW wire to "Y", RED wire to "R", GREEN wire to "G" and BLACK wire to "B". Connect the auxiliary control cable, if installed. (Diagram shows a terminal block with wires inserted, illustrating correct and incorrect insertion.)

3.4.1 ELECTRICAL CONNECTION TO VT7W MAIN WALL CONTROL

(Diagram shows wiring connections for the VT7W main wall control to the unit's terminal block, indicating NO, C, NC, I, OC, OL, Y, R, G, B terminals.)

3.4.2 ELECTRICAL CONNECTION TO VT4W MAIN WALL CONTROL

(Diagram shows wiring connections for the VT4W main wall control to the unit's terminal block, indicating NO, C, NC, I, OC, OL, Y, R, G, B terminals and rear view of VT4W.)

3.4.3 ELECTRICAL CONNECTION TO VT6W MAIN WALL CONTROL

(Diagram shows wiring connections for the VT6W main wall control to the unit's terminal block, indicating NO, C, NC, I, OC, OL, Y, R, G, B terminals.)

3.4.4 ELECTRICAL CONNECTION TO OPTIONAL AUXILIARY WALL CONTROLS (VBATHW AND VB20W)

NOTE: If an optional auxiliary wall control is activated, this control will override the main wall control commands. (Diagram shows wiring connections for VBATHW or VB20W auxiliary wall controls to the unit's terminal block, indicating NO, C, NC, I, OC, OL, Y, R, G, B terminals.)

Once wall control(s) connections are made and checked, close the unit door.

NOTE: For information about the operation of the wall controls, refer to the Main and auxiliary wall controls user guide.

4. ELECTRICAL CONNECTION TO THE FURNACE

For a furnace connected to a cooling system:

On some older thermostats, energizing the “R” and “G” terminals at the furnace also energizes “Y” at the thermostat, turning on the cooling system. If this occurs, use the ALTERNATE FURNACE INTERLOCK WIRING.

STANDARD FURNACE INTERLOCK WIRING: Connects the unit to the furnace's 24-volt thermostat terminals (R, G, W, Y) and the unit terminal connector (NO, C, NC, I, OC, OL, Y, R, G, B). (Diagram shows wiring for standard furnace interlock with 4 wires for heating/cooling and 2 wires for heating only.)

ALTERNATE FURNACE INTERLOCK WIRING: Connects the unit to the furnace's 24-volt thermostat terminal (R, G, W, Y) and the unit terminal connector (NO, C, NC, I, OC, OL, Y, R, G, B) using wiring nuts for NO and NC connections. (Diagram shows wiring for alternate furnace interlock with 4 wires for heating/cooling and 2 wires for heating only.)

5. SPEED SELECTION

The factory set high speed is 100 CFM, and low speed is approximately 50 CFM. To change these values, the transformer wire taps connections must be changed (see table and illustration below).

(Diagram shows the internal electronic assembly with transformer taps (BK, BL, BN, GY, R) and JU1 jumper, illustrating connections for different CFM settings. A color code table for wires is also present: BK-BLACK, BL-BLUE, BN-BROWN, G-GREEN, GY-GREY, O-ORANGE, R-RED, W-WHITE, Y-YELLOW, NC-NO CONNECTION.)

6. WIRING DIAGRAM

A detailed wiring diagram (ref: 24600_REV-A) is provided in the manual for qualified personnel, showing connections for motors, capacitors, transformer, controls, and the CPU. It includes notes on UL/CSA certification, wire replacement, compliance with codes, and class 2 circuits. (The original document contains a complex wiring diagram with various components and connections, which is not transcribed here due to complexity and length constraints.)

7. BALANCING THE UNIT

7.1 WHAT YOU NEED TO BALANCE THE UNIT

• A magnehelic gauge capable of measuring 0 to 0.5 inch of water (0 to 125 Pa) and 2 plastic tubes.
• The balancing chart located on the unit door.

(Diagram shows a magnehelic gauge with two tubes.)

7.2 PRELIMINARY STAGES TO BALANCE THE UNIT

• Seal all unit ductwork with tape. Close all windows and doors.
• Turn off all exhaust devices (range hood, dryer, bathroom fans).
• Make sure integrated balancing dampers are fully open (on Exhaust air to outdoor port and Fresh air from outdoor port). Ensure lever rotation won't exceed 90° to avoid damper not closing. (Diagram shows a damper lever with a 90° max rotation indicator.)
• Make sure all filters are clean.

Make sure the unit is not running in defrost mode while balancing.

Defrost mode can activate below 32°F, preventing balancing. To cancel defrost, use the auxiliary control or jump OC-OL on unit terminal block for 20 minutes of high speed ventilation. Remove jumper after 20 minutes. Another way is to wait 10 minutes after plugging in the unit. Both units start in defrost mode within the first minute of operation.

7.3 BALANCING PROCEDURE

1. Set the unit to high speed. Make sure the furnace/air handler blower is ON if connected to cold air return ductwork; otherwise, leave it OFF.
2. Place the magnehelic gauge on a level surface and adjust to zero.
3. Connect tubing from gauge to exhaust air flow pressure taps and fresh airflow pressure taps. Connect tubes to appropriate high/low fittings. If gauge drops below zero, reverse connections. (Diagram shows airflow paths for FRESH AIRFLOW (HIGH/LOW) and EXHAUST AIRFLOW (HIGH/LOW) with pressure taps for measurement.)
4. Measure both flows; adjust higher flow to equal the lower one using the balancing damper lever.

(Diagram shows a hand using a screwdriver to adjust a damper lever.)

(Diagrams show correct and incorrect positions for the damper lever.)

5. Secure both damper levers in place using their locking screw, then shut all pressure taps with small plastic plugs.
6. Write required air flow information on a label and stick it near the unit for future reference (date, maximum speed air flows, your name, phone number and business address).

NOTE: The unit is considered balanced even if there is a difference of ±10 cfm between the two air flows.

8. SERVICE PARTS

To ensure good working condition, use only Broan-NuTone LLC genuine replacement parts. These parts are designed to comply with certification standards and maintain safety. Third-party parts may cause damage or reduce performance. Broan-NuTone LLC recommends contacting a certified service depot for all replacement parts and repairs.

The manual provides a detailed list of service parts including: Installation Brackets Kit, Balancing and Backdraft Damper Port Kit, Metal Port Kits, Adjustable Port Kit, Door Metal Keepers and Latches Kit, Blower Kits (Cold Side, Warm Side), Thermistors, Transformer Kit, Capacitors, Electronic Board Kit, Magnet with Bracket Kit, Door Assembly, Filter Kits (Standard and Optional MERV 8), ERV Core, Core Locking Device Kit, Terminal Connector, and Optional Hardware Kit. (The original document contains an exploded view diagram of the ERV100S unit with numbered parts and a corresponding table listing part numbers and descriptions. This table is summarized here.)

9. TROUBLESHOOTING

If the unit does not work properly, reset it by unplugging for one minute and then replugging. If issues persist, refer to the table below.

If the unit's LED is flashing, its sensors have detected a problem. The table indicates where the problem occurs:

Common problems and solutions: