Bryant 548J*14D Outdoor Air Enthalpy Control PNO 33CSENTHSW, Return Air Enthalpy Sensor

NOTE:

Optional Outdoor Temperature Control

at One Heater Stage –

Move either heater wire to this terminal and connect outdoor temperature switch between 2nd and 3rd terminals.

548J*14D

C10354

Fig. 31 - Accessory Electric Heater Control Connections

Outdoor Air Enthalpy Control (PNO 33CSENTHSW)

The enthalpy control (33CSENTHSW) is available as a field-installed accessory to be used with the EconoMi$er2 damper system. The outdoor air enthalpy sensor is part of

Return Air Enthalpy Sensor —

Mount the return-air enthalpy sensor (33CSENTSEN) in the return-air section of the economizer. The return air sensor is wired to the enthalpy controller (33CSENTHSW). See Fig. 32.

the enthalpy control. (The separate field-installed accessory return air enthalpy sensor (33CSENTSEN) is required for differential enthalpy control. See Fig. 32.)

Locate the enthalpy control in the economizer next to the Actuator Motor. Locate two GRA leads in the factory harness and connect the gray lead labeled “ESL” to the terminal labeled “LOW”. See Fig. 32. Connect the enthalpy control power input terminals to economizer actuator power leads RED (connect to 24V) and BLK (connect to GND).

The outdoor enthalpy changeover setpoint is set at the enthalpy controller.

Differential Enthalpy Control —

Differential enthalpy control is provided by sensing and

B R

LE K D

Enthalpy
Switch	24V	RED
– 4-20 mA
	GND	BLK
In

+VDC Out

LOW GRA

Return Air

Enthalpy Sensor

+24-36 VDC In

–4-20 mA Out

ESL

	ECONO
	MOTOR
7	CTB
	ECON

Factory

Wiring

Harness

C10282

comparing the outside air and return air enthalpy conditions. Install the outdoor air enthalpy control as described above. Add and install a return air enthalpy sensor.

Fig. 32 - Outside and Return Air Enthalpy Sensor

Wiring

18