1. Introduction
This manual provides essential information for the installation, operation, and maintenance of the Nu-Air ES100 Residential Heat Recovery Ventilator (HRV). The ES100 is designed to provide fresh air while recovering heat from exhaust air, contributing to improved indoor air quality and energy efficiency in homes up to 2500 sq. ft. Please read this manual thoroughly before installation and operation to ensure proper functioning and safety.
The Nu-Air ES100 unit meets ENERGY STAR requirements for HRVs, offering quiet and efficient performance.
2. Safety Information
Always follow basic safety precautions when installing, operating, and maintaining this appliance to reduce the risk of fire, electric shock, or injury to persons.
- Disconnect power before servicing.
- Installation must comply with all local and national electrical and building codes.
- This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety.
- Children should be supervised to ensure that they do not play with the appliance.
- Do not use this unit with any solid-state speed control device.
- Ensure proper grounding.
3. Setup and Installation
3.1 Unpacking and Inspection
Carefully remove the unit from its packaging. Inspect for any shipping damage. Report any damage immediately to your supplier.
3.2 Mounting the Unit
The ES100 is designed for easy hanging with adjustable straps. Ensure the mounting location is structurally sound and allows for proper ducting and maintenance access.
Figure 1: Front view of the Nu-Air ES100 HRV unit. This image shows the compact design and the Nu-Air branding on the side.
3.3 Ducting Connections
The unit features 5-inch round duct connections at the top. Refer to the diagram below for proper connection of return air, outside air, supply air, and exhaust air ducts.
Figure 2: Dimensional drawing of the Nu-Air ES100 HRV, illustrating duct connection points for Return Air (3), Outside Air (1), Supply Air (2), and Exhaust Air (4). Also shows electrical connection point.
3.4 Electrical Wiring
The ES100 operates on 115-120V/1/60 electrical supply. It features removable wire blocks for safe wiring at floor level. Ensure all wiring is done by a qualified electrician and complies with local codes.
- Electrical: 115-120/1/60
- Removable wire blocks for safe wiring.
3.5 Reverse Configuration
The unit features a double door system for immediate reverse configuration without effort, allowing flexibility in installation.
4. Operating Instructions
4.1 Controls
The ES100 is compatible with a new line of attractive, easy-to-use touch controls which can be mounted in single- or multiple-gang boxes. Refer to the control unit's specific manual for detailed operation.
ES Series (12 VDC) Controls:
- ES-M1: Off/Stby/Lo/Hi
- ES-M2: Off/Stby/Lo/20 Lo—40 Stby
- ES-M3: Off/Stby/Lo/20 Lo—40 Recirculation
- ES-M4: Off/Stby/20 Recirculation (Lo)
- ES-T1: 20-40-60-minute timer
- Lumina (NAV-561): Low speed, high speed, intermittent, recirculation, 20/40 standby, 20/40 recirculation, 20-40-60 minute timer, filter service alert (clock)
WINDOR Series (24 VAC) Controls:
- DX-AT-T: Humidity control
- WIN-1: Humidity control/OFF/STBY/Continuous/Intermittent/Full-time high speed
- *WIN-20: 20-minute timer (up to 6)
- *WIN-21: Gang box for multi-switch wall boxes
- Also: Any 24 VAC, two-wire switch.
- *Compatible with Nu-Air 12 VDC control options
4.2 Defrost Operation
When outdoor temperature falls to -5° C (23° F), an automatic timed defrost cycle is initiated. The fresh air motor will go to high speed and the exhaust air motor will turn off. A damper will shut off the cold supply port, directing ambient air through the core for defrosting. The unit will resume normal operation for a fixed duration, then the processor will read outdoor temperature and initiate defrost as necessary. Defrost varies with outdoor temperature.
5. Maintenance
Regular maintenance ensures optimal performance and longevity of your Nu-Air ES100 HRV.
5.1 Filter Cleaning/Replacement
The unit includes two washable filters. Regularly inspect and clean these filters to maintain airflow and efficiency. Refer to the control unit for filter service alerts.
5.2 Core Maintenance
The unit's double door system allows for easy access to the core for routine maintenance. The high-efficiency crossflow HRV core is designed for sensible energy recovery.
5.3 General Cleaning
Keep the exterior of the unit clean. Do not use abrasive cleaners.
6. Troubleshooting
This section provides solutions to common issues. For problems not listed here, contact Nu-Air customer support.
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit not operating | No power; control unit off; tripped breaker | Check power supply; ensure control is on; reset breaker. |
| Reduced airflow | Clogged filters; blocked ducts | Clean or replace filters; inspect ducts for obstructions. |
| Excessive noise | Loose components; fan imbalance | Inspect for loose parts; contact service if fan noise persists. |
| No heat recovery | Core blockage; defrost cycle active | Check and clean HRV core; allow defrost cycle to complete. |
7. Specifications
Detailed technical specifications for the Nu-Air ES100 HRV.
Figure 3: Performance and energy data table for the Nu-Air ES100 HRV, showing airflow, power consumption, and energy recovery efficiency at various static pressures.
| Feature | Detail |
|---|---|
| Model | ES100 |
| Airflow Capacity | Up to 118 cfm |
| Recommended Home Size | Up to 2500 sq. ft. |
| Cabinet Dimensions (LxHxW including duct connections) | 24 x 19 x 13 inches (60.96 x 48.26 x 33.02 cm) |
| Duct Connections | 5-inch round, top |
| Electrical | 115-120V/1/60 |
| Weight | 34 lbs (15 kg) |
| Construction | Lightweight aluminum, double door system |
| Core Type | High efficiency crossflow HRV core with sensible energy recovery |
| Certifications | cCSAus C22.2, ASHRAE 62.2, HVI, ENERGY STAR |
| Special Feature | Door-mounted pressure ports for easy air flow measurement |
Figure 4: Nu-Air ES100 HRV unit with key dimensions labeled in centimeters, showing its compact size for installation.
8. Warranty Information
Nu-Air provides the following warranty for the ES100 HRV:
- 5-year parts warranty
- 15-year HRV core warranty
This warranty covers defects in materials and workmanship under normal use and service. For full warranty terms and conditions, please refer to the official Nu-Air warranty document or contact customer support.
9. Customer Support
For technical assistance, troubleshooting, or warranty claims, please contact Nu-Air customer support.
Nu-Air reserves the right to change specifications without notice.
Note: In defrost and recirculation modes, this unit will not induce indoor negative pressure nor recycle exhaust air; rather, it will redistribute ambient room air.
