Catalogue

UV-PRC004-EN 51
Controls
2. An analog discharge air sensor monitors the temperature of the air coming off of the coil and
if the temperature falls below 40°F the outside air damper is closed, the fan is turned off and
the valves are fully opened.
3. When in the unoccupied mode, the
controller has an adjustable freeze avoidance setpoint. If the
outside air temperature is below the setpoint, the unit will open the valves to allow water to flow
through the coils.
Zone Sensors
Zone sensors are available as either unit, wall, or split-mounted options for design flexibility. Unit
ventilators with the unit-mounted zone sensor option include a thermistor in the unit’s return air
path. Wall-mounted zone sensor options have an internal thermistor. Zone sensors operate on
24 Vac.
Figure 17. Wireless temp sensor with display
(SP, OALH, COMM)
Digit 19 = 3
Figure 18. Wireless temp sensor
(SP, OALMH, COMM)
Digit 19 = 4
Figure 19. Wall mtd temp sensor
(SP, OCC/UNOCC, OA, LMH, COMM)
Digit 19 = J
Figure 20. Unit mtd temp sensor
(SP, OALH, COMM)
Digit 19 = L
X13790822-04 (wall)
X13790855-01 (unit)
X13790492-01 (wall)
X13790855-01 (unit)
X13790842-01 (wall)
X13651467-02 (comm)
X13790843-01 (unit)
Zone Sensors
UV-PRC004-EN.book Page 51 Monday, February 4, 2013 11:01 AM