Sensor Assembly; Figure 5.4 Sensor Assembly - Carrier EverFRESH Operation, Service And Parts Manual

6. Remove the two 1/4" x 20 screws with a 7/16" socket and remove the coil assembly.
7. Remove the EN from the unit.
8. To install, follow removal steps in reverse.
When reinstalling the EN, remove the fittings from the existing valve body and place on the replace-
ment valve body. This is best suited to be completed on a work bench using wrenches. It is not recom-
mended to place the valve body in a vice as it could distort the valve, preventing it from functioning
properly.
5.6

Sensor Assembly

Refer to Warnings in the beginning of this
The sensor assembly (Figure
levels and allows the system to prevent O2 levels from dropping below the lower setpoint. A CO2 sensor provides
CO2 levels to the controller to allow the control algorithm to activate the required EverFRESH components.
CO2 Sensor
NOTE
Service section before performing maintenance.
5.4) consists of an air filter, O2 sensor and CO2 sensor. The O2 sensor monitors O2

Figure 5.4 Sensor Assembly

5–23
O2 Sensor
A i r F i l t e r
Element
T-374