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HRV 1500 SFD or SFDE Speed Selection
The HRV 1500 SFD and HRV 1500 SFDE are equipped with
ECM motors that can be programmed to maintain various
different airflows. The HRV 1500 SFD and HRV 1500 SFDE
have three selectable speeds (High medium and low). Each
of these speeds can be further adjusted to obtain the desired
airflow.
This is done on the ECM circuit board located within the
Additional Features
electrical box. Both motors contain a separate ECM circuit
board to allow for independent adjustment of the motors.
The “adjust” tap will change the airflows on all three of the
speeds. Please note that this unit has been factory set to
obtain 1500CFM at 1" w.g. external static pressure. Adjust-
ment of the high speed settings will produce higher flows
only in situations where the external static pressure is be-
low 1" w.g.