Nu-Air WINDSOR SERIES Operating And Installation Instruction

Also see for WINDSOR SERIES: OPERATING, MAINTAINING & INSTALLING

Nu-Air WINDSOR SERIES Operating And Installation Instruction Manual pdf 14 page image

Nu-Air Ventilation Systems Inc. - HRV Operating & Installation ManualRev. 2.3 Aug. 19, 2014 - 13 -The equipment recommended for balancing your system is easy to use, reliable and costefficient.Once the HRV system is installed and the vapour barrier is completed, ensure thefollowing: Close all windows, doors and fireplace dampers Turn off any exhaust systems such as dryers, range hoods, bath fans and centralvacuums. With multiple-speed forced air furnaces in Extended or Simplified systems, thefurnace should operate at continuous low speed.To balance the HRV, you will need a device to measure air flow. It is recommended touse 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. Disconnect the flex connector from the rigid duct before any branch ducts andCompress the flex duct and insert the flow grid. Tape the joint between the flow gridand ductwork.2. Set the HRV on high speed. Mount the magnehelic gauge level and plumb. Join the hoses from theflow grid to the magnehelic gauge. The needle of the magnehelic gauge should read positively.Switch hose connections if the needle falls below zero.3. Record reading from gauge and adjust the motor speed to the desired CFM.4. Repeat the procedure for the next duct. Adjust motor speeds until air flowreadings are equal or within 10% of each other.Air meter (Nu-Air Part Number 100460):The 460 air meter is available from Nu-Air wholesalers and can be used toquickly balance the HRV in less than five minutes.1. Drill a ¼” hole in both the supply and exhaust ducts on the warm-side of themachine at least 12” away from the HRV and any elbows, tees, etc.2. Set the HRV on high speed.3. Take a pressure reading in each duct and record the results.4. Go back to the duct having the higher reading, and adjust the airflow downuntil the pressure reads to within 10% of the other air flow.5. Use tape to reseal the holes.6. To convert pressure readings to airflow (cfm or L/s) refer to the instructionsand table included with the air meter.4. CONTROLSYour machine is equipped for remote controls. Options include humidity sensing, off-on control,intermittent and continuous modes, recirculation as well as high speed control from the dehumidistat ortimer(s). You can also interlock the furnace blower to the HRV. Various means of controlling thesystem are described below.