Setting Supply Fan Maximum Speed Setpoint - ERM-Drive Fan Type
When a system is equipped with an External Rotor Motor (ERM), the minimum and maximum ERM parameters can be adjusted to tune the airflow to meet the application requirements. In addition to this, the Symbio™ 700 supports setpoints that can adjust airflow as needed:
3 HP RPM Max = 1840
5 HP RPM Max = 1940
Supply Fan Maximum Speed Setpoint
– Range: Determined by unit tonnage. See the table below.
– Operation: This setpoint “trims” the maximum fan speed, based on the configured maximum
ERM rpm.
– Example: rpm max = 1940 rpm
- SupplyFanMaximumSpeedSetpoint @75%yields a maximum of 1358 rpm ERMoutput.
- Effective ERM Max(to be used in Supply Fan Minimum Speed Setpoint application) will be
set to 1358 rpm.
Supply Fan Maximum Speed Setpoint Heating
- High-efficiency 3 to 5 tons heat pump units with staged gas heat are provided a Supply Fan
Maximum Speed Setpoint Heating point to adjust airflow.
Supply Fan Minimum Speed Setpoint
– Range: 0-100%
– Operation: 0-100% over minimum to effective maximum ERM configured fan speed
– Example: ERM Min = 0 rpm, Effective ERM Max = 1940 rpm
- Supply Fan Minimum Speed Setpoint @ 50% yields 970 rpm ERM output.
- MinimumandMaximumSpeedSetpoints interact to ensure that the minimum defined fan speed at a
given equipment operating condition is maintained.
Step 1
Go to the Setting Icon
Step 2
Scroll down until you see Supply Fan Maximum Speed Setpoint
Step 3
Click on the green numbers with the percentage sign
Step 4
Click on the valve and change it to the desired supply fan max speed setpoint
Step 5
Click APPLY to save the new max speed setpoint
Click the e-library symbol for the latest version
WARNING:
Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central air conditioning product. Any attempt to install, service, or repair a heating or central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of the information contained herein, nor can it assume any liability in connection with its use.