Nu-Air WINDSOR SERIES Operating And Installation Instruction
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Nu-Air WINDSOR SERIES Operating And Installation Instruction

Heat recovery ventilator for nu145; nu165; nu205
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* LEAVE THIS DOCUMENT WITH THE HOMEOWNER
Rev. 2.3 Aug. 19, 2104
Windsor, Nova Scotia, B0N 2T0
Phone: 902-798-2261 Fax: 902-798-2557
www.nu-airventilation.com
Email: nuair@nu-airventilation.com
WINDSOR SERIES
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FOR MODELS NU145, NU165, NU205
Specifications, dimensions and ratings may change without notice
as a result of ongoing product development and improvements
P.O. Box 2758
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  • Page 1 P.O. Box 2758 Windsor, Nova Scotia, B0N 2T0 Phone: 902-798-2261 Fax: 902-798-2557 www.nu-airventilation.com Email: nuair@nu-airventilation.com WINDSOR SERIES & & FOR MODELS NU145, NU165, NU205 * LEAVE THIS DOCUMENT WITH THE HOMEOWNER Specifications, dimensions and ratings may change without notice as a result of ongoing product development and improvements...
  • Page 2 NEVER attempt to repair or service any internal component of this H/ERV while the unit is plugged in or running. DO NOT use your ventilation system to exhaust flammable fumes or gasses. ALWAYS contact your Nu-Air representative if you have any questions or comments about the operation or maintenance of your Nu-Air H/ERV—we are here to help you!

  • Page 3: Table Of Contents

    CONTROLS ................................... 13 4.1. Main Board Features ..........................14 4.2. ES Series Controls (12 VDC) ......................... 15 4.3. Windsor Series Controls & Other 24 V Control Options ..............17 4.4. Furnace Interlock ............................ 18 START-UP ..................................18 OPERATING HINTS..............................18 MAINTENANCE ................................

  • Page 4: Performance Ratings & Physical Data

    Nu-Air Ventilation Systems Inc. - HRV Operating & Installation Manual 1. PERFORMANCE RATINGS & PHYSICAL DATA Model: NU165 VENTILATION PERFORMANCE ENERGY PERFORMANCE EXT. STATIC NET SUPPLY GROSS AIR FLOW SUPPLY POWER SENSIBLE APPARENT PRESSURE AIR FLOW SUPPLY EXHAUST TEMP. AIR FLOW...
  • Page 5 Nu-Air Ventilation Systems Inc. - HRV Operating & Installation Manual MODEL: NU145 VENTILATION PERFORMANCE ENERGY PERFORMANCE EXT. STATIC NET SUPPLY GROSS AIR FLOW SUPPLY POWER SENSIBLE APPARENT PRESSURE AIR FLOW SUPPLY EXHAUST TEMP. AIR FLOW CONSUMED RECOVERY SENSIBLE in wg (Pa)
  • Page 6 Nu-Air Ventilation Systems Inc. - HRV Operating & Installation Manual MODEL: NU205 VENTILATION PERFORMANCE ENERGY PERFORMANCE EXT. STATIC SUPPLY GROSS AIR FLOW SUPPLY POWER SENSIBLE APPARENT PRESSURE AIR FLOW SUPPLY EXHAUST TEMP. FLOW CONSUMED RECOVERY SENSIBLE in wg (Pa) cfm (l/s)

  • Page 7: How The Nu-Air System Works

     Heat Recovery Core  Drain Hose Assembly  Balancing dampers are NOT REQUIRED. Windsor Series HRVs from Nu-Air are equipped with a system which allows the installer to adjust each motor in both high and low speed.  Removable terminal blocks for timers, remote controls, furnace interlock. A 4-wire terminal block for 12 VDC ES Series controls and a 10-wire terminal block for 24 V controls are provided with the unit.

  • Page 8: Installation System Options

    Nu-Air Ventilation Systems Inc. - HRV Operating & Installation Manual  Keep use of flexible ducting to a minimum.  Be sure to observe local codes regarding running and insulating ducts in unconditioned spaces. Poorly insulated ducts run in unconditioned spaces will hamper the efficiency of the HRV.
  • Page 9 Nu-Air Ventilation Systems Inc. - HRV Operating & Installation Manual 3.2.2. The Extended Exhaust System This system uses the HRV in conjunction with a forced air furnace distribution system. In this system the HRV supply air to the house is introduced into the return duct of the forced air furnace.

  • Page 10: Ducting To The Outside

    Nu-Air Ventilation Systems Inc. - HRV Operating & Installation Manual 2) In cases where the HRV is coupled with a central air handling system, the HRV fresh air supply duct to the return air plenum shall be connected at a sufficient distance upstream of the plenum connection to the furnace.

  • Page 11: Mounting & Noise Control

    Access to a drain or sump is required to handle the HRV condensate. Care should be taken to run the condensate tube where it cannot freeze. For best results, Nu-Air recommends the following steps be followed when installing drain kits on residential HRV's.
  • Page 12 Nu-Air Ventilation Systems Inc. - HRV Operating & Installation Manual 2. Insert the drain spouts through the holes in the drain pan (B) 3. Use the provided nut to tightly secure the drain spout 4. Cut two lengths of drain hose (E) long enough to avoid kinking 5.

  • Page 13: Balancing The System: High And Low Speed

    Balanced air flow between the supply and exhaust air streams is essential to the performance of an HRV or ERV. With the Windsor Series, changing motor speeds or balancing is quick and simple with two buttons recessed slightly into the unit’s cabinet. NO BALANCING DAMPERS ARE REQUIRED. Be sure to close windows and doors, and turn off all exhaust fans/appliances during the balancing procedure.

  • Page 14: Controls

    To balance the HRV, you will need a device to measure air flow. It is recommended to use either a magnehelic gauge or an air meter, both of which are available from Nu-Air. Depending on the device you are using, follow one of the two procedures below: Magnehelic Gauge: 1.

  • Page 15: Main Board Features

    Nu-Air Ventilation Systems Inc. - HRV Operating & Installation Manual 4.1. Main Board Features The following sections outline some of these features and explain the board in greater detail. A qualified technician must do any service work done within the electrical panel of the HRV.

  • Page 16: Es Series Controls (12 Vdc)

    Mix and Match Controls. Because the unit circuit board is equipped with separate, removable terminal blocks to accommodate both ES Series and Windsor Series controls, both types of control may be used in the same installation. All ES Series Controls (sold separately) connect to the 12V (4-wire) removable terminal block.
  • Page 17 Nu-Air Ventilation Systems Inc. - HRV Operating & Installation Manual 4.2.4. ES-M3 Control 1. No LED: HRV/ERV is OFF 2. Stby: Unit is in standby, ready for a command 3. Lo: Unit operates in low speed continuously 4. 20 Lo/40 Rec.: Unit cycles between 20 minutes continuous low and 40 minutes recirculation.

  • Page 18: Windsor Series Controls & Other 24 V Control Options

    See Section 10 for wiring diagrams. Mix and Match Controls. Because the unit circuit board is equipped with separate, removable terminal blocks to accommodate both ES Series and Windsor Series controls, both types of control may be used in the same installation.

  • Page 19: Furnace Interlock

    Nu-Air Ventilation Systems Inc. - HRV Operating & Installation Manual 4.4. Furnace Interlock For simplified (return/return) duct systems, it is mandatory that the HRV be interlocked with the furnace blower such that the furnace fan runs when the HRV is on to distribute supply air throughout the space.

  • Page 20: Maintenance

    Dirty filters can reduce ventilation efficiency, result in unbalanced airflow and damage or shorten the life of the motors. Vacuum every three months. Polyester filters should typically be replaced every 1-3 years. Permanent electrostatic filters are available from your Nu-Air dealer. Filters remove easily by opening the front cover.

  • Page 21: Trouble Shooting

    Nu-Air Ventilation Systems Inc. - HRV Operating & Installation Manual 9. TROUBLE SHOOTING SYMPTOM EXPLANATION ANSWER   The humidity level seems HRV air flows incorrectly balanced. Balance Air Flow(s).   too low. Dehumidistat control set too low. Increase Dehumidistat.

  • Page 22: Electrical Schematics

    Nu-Air Ventilation Systems Inc. - HRV Operating & Installation Manual 10. ELECTRICAL SCHEMATICS 10.11. ES Series Wiring Diagrams NU165 p/n 50321 NA-HRV rev F NU145 p/n 50321 NA-HRV rev F Rev. 2.3 Aug. 19, 2014 - 21 -...

  • Page 23: Altering Furnace Interlock Settings

    Nu-Air Ventilation Systems Inc. - HRV Operating & Installation Manual NU205 10.12. Altering Furnace Interlock Settings Depending on local Building Codes, you may choose to interlock whenever the HRV/ERV is operating at any speed, or just high speed. Position 5: interlock at any HRV speed; Position 6: interlock at HRV high speed only.

  • Page 24: Unit Control Board: Status Leds & Remote Control Connections

    Unit Control Board: Status LEDs & Remote Control Connections The unit control board is divided into two “sections” comprising a 12V RS485 control standard and a 24V standard. With this feature, the user may use ES Series 12V controls and/or Windsor Series 24V controls or 2-wire, 24V switch.

  • Page 25: Dstat-1 Control Wiring

    For two-wire switching, and where local building regulations permit, PURPLE Nu-Air recommends a jumper wire between R and SB to engage the unit in standby mode when intermittent operation is desired. PURPLE *It is not necessary to connect jumper wires R-SB and R-LO (low speed overrides standby).

  • Page 26: Win-20 Control Wiring

    For two-wire switching, and where local building regulations permit, BLACK Nu-Air recommends a jumper wire between R and SB to engage the unit in standby mode when intermittent operation is desired. BLACK *It is not necessary to connect jumper wires R-SB and R-LO (low speed overrides standby).

  • Page 27: Warranties

    Lifetime HRV Core Warranty If the recovery plastic core in your NU-AIR Heat Recovery Ventilator fails due to a defect in material or workmanship NU-AIR Ventilation Systems Inc. will supply a new core FOB Factory to replace the defective part. Delivery and labour costs are your responsibility.
  • Page 28 Windsor, Nova Scotia 16 Nelson St. P.O Box 2758 B0N 2T0 Canada Ph: 902-798-2261 Fax: 902-798-2557 Email: nuair@nu-airventilation.com Web: www.nu-airventilation.com...
  • Page 29 READ AND FILL OUT REGISTRATION ’ ’ CARD IMMEDIATELY THIS IS YOUR WARRANTY REGISTRATION CARD In order to properly validate your warranty, you must fill out and return this card. Failure to register unit will FIRST NAME LAST NAME require you to present proof of purchase should the unit NOM DU PRÉNOM ________________________ NOM DE FAMILLE______________________________ require service.

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