Nu-Air NU0820, Руководство по эксплуатации продукта

Страница: 43 / 48

Document # CSM001 Revision Date: August 9, 2016
Page 43 of 48
10.6 Balancing The System
Unless otherwise specified by the system designer, set up the HRV with balanced
supply and exhaust air flows.
The pulleys used on the supply and exhaust motors are a split type that allows
some field adjustment of the fan rpm and corresponding air flow. Adjust the
pulley in ½ turn increments.
Close to increase rpm, open to decrease rpm.
Once the HRV system is installed, do the following:

Close all windows and doors.

Turn off any exhaust only systems.

To balance the HRV, set the machine on high speed.

Make a small hole in the supply duct at least 10 feet downstream of the fan.
Insert a Pitot tube in the cross sectional center of the duct.

Measure the pressure with a digital manometer or magnehelic gauge.

Record the value and repeat the procedure for the exhaust air stream.

Install a balancing damper in the air stream with the greater flow and damper
back until the pressure equals that of the opposite air stream.