Emerson E2 operation manual Dewpoint Probe, Light Level Sensor, Duct-mounted Insertion RH Probe

Figure 3-24- Outdoor RH Sensor - Exploded View

3.5.8.3Duct-mounted Insertion RH

Probe

Emerson Retail Solutions specs a duct-mounted rela- tive humidity (RH) sensor (P/N 203-5771)with a 0-5VDC output for use in building control and anti-sweat control applications using Emerson Retail Solutions input boards.

1.Cut a small circular hole in the duct large enough for the sensor tube to fit through.

2.Bolt the sensor enclosure against the outside of the duct wall so that the sensor element fits through the hole and into the duct. The enclosure may be mounted horizontally, as shown in Fig- ure 3-25or vertically. The screws should be tight enough for the foam gasket around the bottom of the sensor to form an airtight seal between the hole in the duct wall and the outside air.

Figure 3-25- Duct-mounted RH Sensor - Exploded View

3.5.9Dewpoint Probe

3.5.9.1Location

The Dewpoint Probe (P/N 203-1902)should be located

4 to 6 feet from the floor with the probe pointing up. It is recommended that the Dewpoint Probe be mounted in an area where it will be exposed only to minimal amounts of dust.

3.5.9.2Mounting

Mount the probe using the standard switch cover sup- plied with the unit as shown in Figure 3-26.

Figure 3-26- Dewpoint Probe Mounting

.

3.5.10 Light Level Sensor

3.5.10.1Location

The Light Level Sensor (P/N 206-0002)should be located facing away from direct sunlight, preferably facing north in the Northern Hemisphere or south in the Southern Hemisphere.

3.5.10.2Mounting

The light level sensor is not supplied with mounting hardware. The sensor should be mounted horizontally through the knockout of a standard weather-resistant junc- tion box. Figure 3-27shows a typical mounting configu- ration.

3-10 • E2 RX/BX/CX I&O Manual 026-1614 Rev 4 5-JAN-2013