Additional Features
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
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.
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