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APPENDIX E — AIR BALANCE INSTRUCTIONS (CONT)
CONSTANT SPEED BALANCING
1. Navigate to the Manual Override screen (
Home
Setup
Man Ovrd
) and set the Supply Fan and Exhaust Fan (if
equipped) output to “On”.
2. Change the percent value to change the fan speed (0-100%)
to achieve the design airflow.
NOTE: allow time between chancing the fan speeds for the sys
-
tem to balance out.
3. Once the proper fan speeds have been identified to achieve
the design airflow, leave the manual override “On” and the
percent set to the needed speed.
NOTE: Whenever the unit fan(s) are commanded on, they will run
in the override mode at the set percent speeds. The fan(s) will turn
off when commanded off by the controller (unoccupied mode).
VARIABLE SPEED BALANCING - PRESSURE CONTROL
1. Navigate to the Manual Override screen (
Home
Setup
Man Ovrd
) and set the Supply Fan and Exhaust Fan (if
equipped) output to “On”.
2. Change the percent value to change the fan speed (0-100%)
to achieve the design airflow.
NOTE: allow time between chancing the fan speeds for the sys
-
tem to balance out.
3. Once the proper fan speeds have been identified to achieve
the design airflow, navigate to the Supply Fan Status screen
(
Home
Sup Fan
) and record the supply fan pressure read
-
ing (SF-DPT).
4. For units with exhaust fan, navigate to the Exhaust Fan Status
screen (
Home
Ex Fan
) and record the building pressure
reading (Zn-DPT).
5. Navigate to the Fan Setpoints screen (
Home
Stp/DB
Fans
) and set the following parameters to match the recorded
values.
• Supply Fan Mod: DPT (for supply fan duct pressure con
-
trol) or ZNDPT (for supply fan space pressure control
ETP).
• Bldg Static Press ZNDPT (for exhaust fan space pressure
control, if equipped).
Navigate to the Manual Override screen (
Home
Setup
Man Ovrd
) and set the Supply Fan and Exhaust Fan (if
equipped) output to “Off”. The fans will now operate to the
DPT set points.
6. For duct pressure control applications, it's also recommended
to set a minimum supply fan speed of no lower than 50%. If
the minimum airflow requirement is known, use the Manual
Override (
Home
Setup
Man Ovrd
) function to find the
required minimum fan speed. Once identified, navigate to the
Tech Settings screen (
Home
Setup Tech.
Setup
) screen
and set the SF Minimum Setting to the identified minimum
speed. Remove the Manual Override function to restore nor
-
mal operation.
VARIABLE SPEED BALANCING - AIRFLOW MONITOR
CONTROL
Navigate to the Fan Setpoints screen (
Home
Stp/DB
Fans
)
and set the following parameters to match design airflow:
• Supply Fan Mod: CFM
• Exhaust Fan Mod: CFM
The fans will now operate to the set CFM when enabled.
AIR BALANCE CHECKOUT
Verify Test Mode has been disabled (
Home
Setup
Test
) by
changing Run Test to “Off”.