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PRICE INTELLIGENT CONTROLLER WITH LCD THERMOSTAT - Manual
PRICE INTELLIGENT CONTROLLER WITH LCD THERMOSTAT
AIR BALANCING GUIDE
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AIRFLOW TWEAK
0%
For Controllers with Airflow Tweak Menu
To make adjustments on controllers with airflow tweak instead
of airflow factor, scroll to the airflow tweak menu. The screen
will display the current CFM. Press the menu button and the
CFM reading will change to a flashing ‘0%’.
Adjust the % by the percentage high or low that the balancing
hood is reading versus the thermostat. For example, if the
thermostat reads 250 CFM, but the balancer’s hood reads 300
CFM, follow the formula below to calculate the % higher or
lower to offset the tweak.
Tweak = (1 / (CFM stat / CFM hood) -1)*100
Now the thermostat’s displayed CFM should much more closely match the hood’s CFM reading.
THEN
AIRFLOW TWEAK
250 CFM
For Controllers with Airflow Factor Menu
If any adjustment is required, press the ‘DOWN’ arrow key,
the thermostat will now read ‘AIRFLOW FACTOR’ and will
display its current CFM reading. Press the menu button and
the CFM reading will change to display the current K factor,
and the value will be flashing, indicating it is ready to be
changed using the arrow keys.
Adjust the K factor by the percentage high or low that the
balancing hood is reading versus the thermostat. For example,
if the thermostat reads 250 CFM but the balancer’s hood
reads 300 CFM, divide 250 by 300 to get .833, this means
the controller is reading 83.3% of what the balancer’s hood is
reading, so the K factor must be adjusted up. Supposing the
box is an 8” inlet size, the K factor would be 890, so you would
divide 890 by .833, and the new corrected K factor would be
1068.
K adjusted = K original / (CFM stat / CFM hood)
THEN
AIRFLOWFACTOR
250 CFM
AIRFLOWFACTOR
890
OR
OR
Tech Support - CALL 204 654-5613 option 4
