Bryant F, 580J*08--14D appendix Economizer Controls, Outdoor Air Enthalpy Control PNO HH57AC077

580J

SEN J20-1

SEN J20-2

C08460

Fig. 46 - RTU-MP T-55 Sensor Connections

Connect T-56

See Fig. 47 for T-56 internal connections. Install a jumper between SEN and SET terminals as illustrated. Connect T-56 terminals to RTU-MP J20-1, J20-2 and J20-3 per Fig. 48.

1	2	3	4	5	6	RED(+)
					WHT(GND)		CCN COM
						BLK(-)
			SEN		SET
	SW1					BLK
						(T56)
					BRN (GND)		SENSOR WIRING
					BLU (SPT)
							JUMPER
							TERMINALS
							AS SHOWN

Cool Warm

C08202

Fig. 47 - T-56 Internal Connections

SEN J20-1

SEN J20-2

Jumper

SET

SET J20-3

C08461

Fig. 48 - RTU-MP T-56 Sensor Connections Connect T-59

The T-59 space sensor requires a separate, isolated power supply of 24 VAC. See Fig. 49 for internal connections at the T-59. Connect the SEN terminal (BLU) to RTU-MP J20-1. Connect the COM terminal (BRN) to J20-2. Connect the SET terminal (STO or BLK) to J20-3.

BRN (COM)

BLK (STO)SENSOR

WIRING

BLU (SPT)

OR SET	SEN
OPB	COM- PWR+

	POWER
24 VAC	WIRING

NOTE: Must use a separate isolated transformer.

C07132

Fig. 49 - Space Temperature Sensor Typical Wiring

(33ZCT59SPT)

Economizer Controls

Outdoor Air Enthalpy Control (PNO HH57AC077)

The enthalpy control (HH57AC077) is available as a field-installed accessory to be used with the EconoMi$er2 damper system. The outdoor air enthalpy sensor is part of the enthalpy control. (The separate field-installed accessory return air enthalpy sensor (HH57AC078) is required for differential enthalpy control.)

Locate the enthalpy control in the economizer hood. Locate two GRA leads in the factory harness and connect these leads to enthalpy control sensors 2 and 3. (See Fig. 50.) Connect the enthalpy control power input terminals to economizer actuator power leads RED (connect to TR) and BLK (connect to TR1).

Enthalpy	LCTB
	ECON
Switch

2	GRA	6
3	GRA	7
	Factory Wiring Harness
		C08218

Fig. 50 - Enthalpy Switch (HH57AC077) Connections

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

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