Airflow Instruments PAN300 Series, Operation And Service Manual

Page: 15 / 40

Preparing PAN300 System for Air Duct Leak Testing
9
c. For negative pressure,
high-flow testing,
remove the low flow
nozzle if it is installed.
Then, connect the grey
cast aluminum cam
lock connector to the
inlet side of the blower
per Figure 8. Close
both cam lock arms at
the same time to
ensure proper fit.
Connect the free end of
Figure 8. Negative Pressure,
High-Flow Set-Up
the 16-ft (5-m) silicone tube to pressure tap marked DUCT
PRESSURE P4 (-) on the black square box.
Finally, verify that the FLOW GRID MODE pressure taps on
the inlet tubes are connected to the FLOW GRID pressure
taps, i.e., P1 (+) to P1 (+) and P2 (-) to P2 (-) .
d. For negative pressure,
low-flow testing, add
the low-flow nozzle to
the blower inlet if it is
not installed. Then,
connect the grey cast
aluminum cam lock
connector to the low-
flow nozzle per
Figure 9.
Close both
cam lock arms at the
same time to ensure
proper fit.
Connect the free end of
Figure 9. Negative Pressure,
Low-Flow Set-Up
the 16-ft (5-m) silicone tube to pressure tap marked DUCT
PRESSURE P4 (-) on the black square box.
Fan
Inlet
Cam Lock
Connector
Fan
Inlet
Low Flow
Nozzle
Cam Lock
Connector