10.0 Air Flow Balancing - Broan ERV100HC Installer Manual

10.0 Air Flow Balancing

W N
HAT YOU EED TO
• A magnehelic gauge capable of measuring 0
to 0.25 inch of water (0 to 62.5 Pa) and 2 plastic
tubes.
• Two "Flow Measuring Stations" or two flow
collars (the size will vary depending on the
duct diameter).
P S
RELIMINARY TAGES TO
• Seal all the unit ductwork with tape. Close all windows and doors.
• Turn off all exhaust devices such as range hood, dryer and bathroom fans.
• Make sure all filters are clean (if it is not the first time you balance the unit).
• Make sure the balancing dampers are fully open (F and G in figure 21).
Choose appropriate locations for the 2 flow collars (or flow measuring stations), according to figure 21:
• On the exhaust air duct (first measuring location, A)
• On the fresh air distribution duct (second measuring location, B
• At least 36" away from the unit; at least 12" before or after a 90° elbow; at least 12" away from a
register.
OR
B
12¨(30 mm) 04m
12¨(304mm)
VP0012
Figure 21
I F
NSTALLATION OF LOW
• If you are using Flow Collars:
Insert the flow collars in the duct at each location. Make sure their arrows are pointing in the direction
of the airflow. Tape collars in place temporarily.
• If you are using "Flow Measuring Stations":
Cut a 1" (25.4mm) diameter hole in the duct at each location. Insert the "Flow Measuring Stations".
Make sure their arrows are pointing in the direction of the airflow. Tape the "Flow Measuring Stations"
in place temporarily.
B U
ALANCE THE NIT
B U
ALANCE THE
36¨(914mm)
F
C "F
OLLARS OR LOW
Flow collar
NIT
M S
EASURING TATIONS
29
VP0006
Flow measuring station
A
36¨(914mm)
G
"