Table of Contents
Advertisement
Fan Calibration
NOTE
Integral fan – front recirculating models shouldn't have
to be calibrated, as these require no added ductwork.
Fan calibration is necessary for integral fan – rear
discharge and external fan configurations (both inline
and fan by others).
NOTE
To avoid poor hood performance, it is important for
the hood to be balanced for the designed CFM. For
NFPA 101 compliant models, 500 designed CFM is
required.
Hood Length
NFPA 101
(in.)
Compliance
No
No
No
30
No
Yes
Yes
Yes
No
No
No
36
No
Yes
Yes
Yes
Once balancing is complete, press the back arrow button to navigate back to the previous screen.
14
Fire Ready Hood
Ventilation
Integral Fan – Front Recirculating
Integral Fan – Rear Discharge
External Fan - Top Discharge
External Fan - Top Discharge
Integral Fan - Rear Discharge
External Fan - Top Discharge
External Fan - Top Discharge
Integral Fan – Front Recirculating
Integral Fan – Rear Discharge
External Fan - Top Discharge
External Fan - Top Discharge
Integral Fan - Rear Discharge
External Fan - Top Discharge
External Fan - Top Discharge
Once hood and fan (if external) is installed and powered,
navigate into the service menu on the user interface.
Navigation instructions can be found on pages 17-19.
Press the "Balance Exhaust Fan" button, and fan will
turn on and ramp to full speed.
Once fan is on, connect one end of manometer to
plenum pressure port (1/8 inch MNPT barb located near
grease filter) and take reading. Adjust the max speed as
necessary to match the pressure with the corresponding
value on the screen (or reference the table below based
on your hood size and configuration).
For example, for a 36 inch, non-NFPA 101 compliant,
external fan – top discharge, inline fan configuration
model, to obtain the designed 300 CFM, we need the
plenum pressure reading to be 0.25 in. wc.
External Fan
Plenum Pressure Reading
CFM
Type
for Designed CFM
Not applicable
250
Not applicable
250
Inline
250
Fan by Others
250
Not applicable
500
Inline
500
Fan by Others
500
Not applicable
300
Not applicable
300
Inline
300
Fan by Others
300
Not applicable
500
Inline
500
Fan by Others
500
Default Max
Balance Speed
.21
70%
.27
50%
.13
100%
.13
100%
.67
80%
.34
100%
.34
100%
.28
80%
.20
50%
.25
100%
.25
100%
.54
100%
.62
100%
.62
100%
Advertisement
Table of Contents
