LG PESC0RV0 Installation Manual page 7

Wiring Procedure
1. Power down the ERV.
2. Attach one male end of the extension cable to the female connection on the hard-wired cable.
3. Attach the other male end of the extension cable to the CN-CO2 terminal on the ERV Main PCB.
4. Reattach the CO2 sensor PCB to the bottom of the case (that has already been wall-mounted).
Figure 6: Wiring from ERV PCB to CO2 Sensor.
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ERV PCB Example
(Actual Appearance Depends on Model)
Operation
1. At initial power up, a wrench symbol will appear on the LCD and the yellow LED on
the CO2 sensor PCB lights up for two (2) to three (3) seconds.
2. Turn ERV on at the zone controller or central controller. Set the ERV fan mode to Auto.
3. The ambient CO2 concentration in parts per million (ppm) will then appear on the
LCD. Permit the system to operate for about five [5] minutes before obtaining an
accurate reading.
4. The CO2 reading will update every three (3) seconds, using data from the CO2
infrared sensor.
5. ERV fans will automatically operate according to CO2 sensor readings (see table at right).
troubleshooting
• The wrench symbol displays on the LCD and the yellow LED on the CO2 sensor PCB turns on if there is an error and / or if the reading is
outside the measuring range (0 to 2,000 ppm).
• Both the wrench symbol and the yellow LED will turn off when the CO2 sensor returns to normal operation.
• If CO2 readings fluctuate ±200 ppm, the reading may be unstable.
• If the system has been operating for more than five (5) minutes, and readings continue to be unstable, verify that the CO2 sensor's
connections are properly secured.
WIRING PROCEDURE, OPERatION,
CN-CO2
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Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. "LG" is a registered trademark of LG Corp.
aND tROUBLEShOOtING
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33-Foot Extension Wire
Use only the hard-wired factory supplied 33-foot extension wire.
Field-supplied wires and / or splicing is not / are not permitted.
There is risk of unit failure or malfunction if cables other than LG
supplied components are used.
Table 3: ERV Operation Sequence with CO2 Sensor.
CO2 Sensor Reading
500-700 ppm
700-900 ppm
CO2 Sensor
ERV Fan Operation
<500 ppm Off
Low Speed
High Speed
>900 ppm Super High Speed
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