Nu-Air Windsor NU145 Operating, Maintaining & Installing Download Page 1

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Rev. 6.1 November 1, 2016

P.O. Box 2758

Windsor, Nova Scotia, B0N 2T0

Phone: 902-798-2261 Fax: 902-798-2557

www.nu-airventilation.com

Email: [email protected]

Windsor SERIES

OPERATING, MAINTAINING & INSTALLING YOUR HEAT RECOVERY

VENTILATOR

FOR MODELS NU145, NU165, NU205, MANUFACTURED MAY 2015 ONWARD

* LEAVE THIS DOCUMENT WITH THE HOMEOWNER

Specifications, dimensions and ratings may change without notice

as a result of ongoing product development and improvements

Now Featuring the Nu-Air EZ System.

EZ Level suspension straps.

EZ Balance pressure ports to measure
and balance air flows.

Summary of Contents for Windsor NU145

Page 1: ...AINING INSTALLING YOUR HEAT RECOVERY VENTILATOR FOR MODELS NU145 NU165 NU205 MANUFACTURED MAY 2015 ONWARD LEAVE THIS DOCUMENT WITH THE HOMEOWNER Specifications dimensions and ratings may change without notice as a result of ongoing product development and improvements Now Featuring the Nu Air EZ System 1 EZ Level suspension straps 2 EZ Balance pressure ports to measure and balance air flows ...

Page 2: ... a pose risk of personal injury or damage to this product For indoor installations only Your H ERV is equipped with a 3 prong plug which will fit an A C electrical outlet in just one orientation Do not alter this plug or its cord in any way Grip the plug firmly when removing it from an electrical outlet NEVER unplug this product by pulling or twisting its power cord ALWAYS unplug an H ERV before y...

Page 3: ...The Outside 7 Mounting Noise Control 8 Ductwork 9 Drain Connections 10 Furnace Interlock 11 Balancing Air Flows 12 3 CONTROL OPTIONS CONTROL WIRING 14 ES Series Controls 12 VDC 14 Windsor Series Controls Other 24 V Control Options 16 Status LEDs Mode of Operation 18 4 START UP 19 5 MAINTENANCE 19 6 ANNUAL SERVICING 19 7 TROUBLE SHOOTING 20 8 ELECTRICAL SCHEMATICS 21 9 WARRANTIES 23 10 NOTES SERVIC...

Page 4: ...CO2 sensor etc Full Time High Speed The unit runs in high speed on command from a central control or timer Timed High Speed Timers operate the unit in high speed for 20 or 20 40 60 minute intervals 20 Lo 40 Standby The unit runs in a cycle of 20 minutes in low speed followed by 40 minutes of standby 20 Lo 40 Recirculation The unit runs in a cycle of 20 minutes in low speed followed by 40 minutes o...

Page 5: ...andard Issue Items The HRV comes equipped with Filters Anti Vibration Straps Heat Recovery Core Drain Hose Assembly Balancing dampers are NOT REQUIRED ES 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 cont...

Page 6: ...y Exhaust Air Laundry Rooms Kitchens Bathrooms other wet rooms Note Kitchen exhaust grills should be equipped with a grease filter and must be located at least 3 ft horizontally in all directions from the surface of the range extended to the ceiling Installation System Options Before installing your HRV please read these instructions for correct installation The Nu Air HRV is a self contained syst...

Page 7: ...of 40 inches upstream of the supply air connection to avoid short circuiting of the fresh air 2 3 5 1 Simplified System Continuous Ventilation Intermittent Operation For proper supply air distribution with this system and to prevent short circuiting in the return air duct the furnace fan must run during ventilation mode Interlock the furnace and HRV in accordance with Section 2 8 INSTALLATION NOTE...

Page 8: ...join the inner duct to the hood s sleeve 3 Tape the vapour barrier to back of the hood without compressing the insulation Caulk or foam seal around the collars and hoods to eliminate air and water leaks 4 Locate the hoods for easy access to the bird screen for cleaning purposes 5 Be sure to use exterior sealant along the top and side edges of the hoods tooling the sealant to ensure a good seal Mak...

Page 9: ...d in a heated area The HRV is designed to be hung from the ceiling by way of the anti vibration straps supplied Avoid hanging the HRV directly below a bedroom or other quiet area Your unit comes with Nu Air EZ Level adjustable hanging straps for easy mounting and leveling 2 5 1 Connecting To Other Equipment Residential Applications Interconnection with a forced air furnace duct system is permissib...

Page 10: ...Port Recirculation and Defrost Strategies ducting For units equipped with a 5th port there are three options to suit the requirements of the installation 1 Unducted Simply allow the unit to draw ambient air from the space in which the unit is located 2 Ducted with a grill Duct the 5th port to a neutral space This approach is particularly useful in distributing super heated air in which there might...

Page 11: ...epeat for the other side 6 Secure the hose to the spout with the plastic tie wraps D 7 Install the Tee F in either of the two ways shown in the drawings below 8 Attach the free end of the hose to the left fitting Repeat for the other side 9 Use the remaining hose to form a P trap and terminate at the top of the tee 10 Pour approximately one cup of water into the drain assembly to form an air seal ...

Page 12: ...any HRV speed Position 6 interlock at HRV high speed only STANDARD FURNACE INTERLOCK ALTERNATE FURNACE INTERLOCK If the standard interlocking method has the unwanted effect of bringing on the AC i e thermostats that do not isolate G from Y use the alternate method shown above UNIT 24 VAC REMOVABLE TERMINAL BLOCK COOLING SYSTEM FURNACE 24 VAC NC I NO R C TL TS SB Hi LO THERMOSTAT TERMINALS Y R G W ...

Page 13: ...ill need a device to measure air flow It is recommended to use either a magnehelic gauge or differential pressure digital manometer capable of measuring 0 to 0 5 inch of water 0 125 Pa Depending on the device you are using follow one of the two procedures below Magnehelic Gauge and Flow Grid 1 Disconnect the flex connector from the rigid duct before any branch ducts Compress the flex duct and inse...

Page 14: ...FRESH air or EXHAUST air pushbuttons not both for 3 Seconds to initiate SPEED ADJUST MODE 2 Press the corresponding button to adjust the fresh air fan or the exhaust fan speed thereby changing the air flow Each press reduces motor speed until the default minimum is reached at which point the motor will return to its peak speed Allowing a brief pause between presses about 0 5 seconds you will press...

Page 15: ... LED s The touch pad is used to select mode of operation or turn the appliance off The LED s indicate mode of operation ES Tx and Mx controls can be used in virtually any number and can be wired in series or in parallel ES Tx and Mx Controls and their Functions Control Description Functions ES T1 20 40 60 minute timer Initiates timed high speed when unit is in low speed or standby ES M1 Off Standb...

Page 16: ... the only option to access recirculation for these older units 3 1 3 Wiring ES Series Controls Using a 3 mm flat head screwdriver connect 4 conductor wire to the 12 VDC 4 wire removable terminal block provided Wiring ES controls involves simply matching terminals on the control to those of the HRV ERV terminal block see right DO NOT cross the 12V 12 and ground GND G wires For ES controls doing so ...

Page 17: ...speed when unit in standby or low speed Suitable for multi switch gang boxes 3 2 1 Wiring Windsor Series Controls and Other 24 VAC Options Using a 3 mm flat head screwdriver connect 2 4 conductor wire according per requirements to the 24 VAC 10 wire removable terminal block provided 3 2 1 1 DSTAT 1 DSTAT 1 For intermittent high speed operation connect Nu Air PN DSTAT 1 to R and Hi terminals Jumper...

Page 18: ...D yellow SWITCH black WIN 20 Up to 6 Win 20 timers may run off of one system WIN 20 can be combined with ES Series controls or 24V controls discussed in this document For Win 20 2 wiring R and TS terminals are used If you are using ONLY a WIN 20 s to control your unit you must connect a jumper wire between R and SB on the 24V 10 wire removable terminal block In this situation you can add continuou...

Page 19: ...s EXCHANGE HIGH SPEED Green ON Red blinking fast DEFROST Green ON Red ON RECIRCULATION HIGH SPEED Red led ON Green led blinking fast 2 Wire Switch For intermittent high speed operation connect dedicated RNC wall switch CO2 sensor etc to R and Hi terminals Jumper Option 1 For continuous low speed connect jumper wire to R and LO terminals Jumper Option 2 A jumper wire between R and SB to engage the ...

Page 20: ...raps a quantity of water to prevent air from entering the HRV via this tubing Heat Energy Recovery Core The core located behind the cover should be removed and cleaned at least once a year using a mild detergent in cold water To remove the cover of the machine unlatch the two latches slide the door to right to release from hinges Fiber media ERV core must not be washed rather vacuumed at the inter...

Page 21: ...ce HRV Check integral damper function where present Install back draft dampers as needed Check defrost system Note minimal frost build up is expected on cores before unit initiates defrost cycle function The supply air feels cool HRV air flows incorrectly balanced Improper location of supply grills Extremely cold outside temperatures Moving air feels cooler than it actually is Balance HRV Locate g...

Page 22: ...Rev 6 1 November 1 2016 21 8 ELECTRICAL SCHEMATICS NU165 HRV and ERV models ES100 ES150 NU145 p n 50321 NA HRV rev F p n 50321 NA HRV rev F ...

Page 23: ...Rev 6 1 November 1 2016 22 NU205 p n 50321 NA HRV rev F ...

Page 24: ...r 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 Nu Air warrants its ERV core to be free from manufacturing defects for a period of five 5 years Warranty Limitations The above warranty does not cover damage to the unit while in your possession other th...

Page 25: ...Rev 6 1 November 1 2016 24 10 NOTES SERVICE RECORD ...

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