I bought a GE room pressure monitor (RPM-1), and I'd like to install it in my house to operate a make-up air fan for when the house becomes depressurized (e.g., my wife turns on both gas clothes dryers, or a piece of wood is burning in the fireplace, sending a ton of air up the chimney). The sensor will be on the outside of the house, effectively turning the house into the 'room'.
The room pressure monitor literature indicates:
--The room pressure monitor comes standard with a SPDT relay (for supplemental controls such as audible alarm or remote status indication), and 3
analog output signals, 0 to 5 VDC, 0 to 10 VDC and 4 to 20 mA. These analog outputs are proportional to the room pressure.
From this description, I believe it means that as the pressure difference between the outside of the house and the inside increases, that the analog output signal will increase as well.
I believe I can connect the analog output signal from the RPM to an electronic fan speed controller (EFSC):
Here is the description of an EFSC by sentera-controls:
EVS
The EVS automatically controls the speed of single phase (230 VAC 50 Hz) voltage controllable electric motors with a 0-10 VDC or 0-20 mA control signal selectable by switch. It is possible to invert the control signal to 10..0 VDC/20..0 mA. To power on, an external switch on the power supply is provided. A supplementary terminal block is foreseen to branch off 230 VAC not controlled for 3-wire motor connection, a telltale or to control a valve or damper.
There are two working modes, internally selectable by switch: kick start or soft start.
Any advice would be appreciated--I am experienced with 120 volt residential wiring, and have a multi-meter, but this low power circuit stuff is a little foreign to me.
Thanks,
toddmanqa
The room pressure monitor literature indicates:
--The room pressure monitor comes standard with a SPDT relay (for supplemental controls such as audible alarm or remote status indication), and 3
analog output signals, 0 to 5 VDC, 0 to 10 VDC and 4 to 20 mA. These analog outputs are proportional to the room pressure.
From this description, I believe it means that as the pressure difference between the outside of the house and the inside increases, that the analog output signal will increase as well.
I believe I can connect the analog output signal from the RPM to an electronic fan speed controller (EFSC):
Here is the description of an EFSC by sentera-controls:
EVS
The EVS automatically controls the speed of single phase (230 VAC 50 Hz) voltage controllable electric motors with a 0-10 VDC or 0-20 mA control signal selectable by switch. It is possible to invert the control signal to 10..0 VDC/20..0 mA. To power on, an external switch on the power supply is provided. A supplementary terminal block is foreseen to branch off 230 VAC not controlled for 3-wire motor connection, a telltale or to control a valve or damper.
There are two working modes, internally selectable by switch: kick start or soft start.
- Supply: 230 VAC 50 Hz
- According to Low voltage directive: 2006/95/EC, EMC directive: 2004/108/EC
Any advice would be appreciated--I am experienced with 120 volt residential wiring, and have a multi-meter, but this low power circuit stuff is a little foreign to me.
Thanks,
toddmanqa