Bryant 580F Barometric Flow Capacity, Outdoor-AirDamper Leakage, Return-AirPressure Drop

(cfm)	2500
MINUTE	2000
PER	1500
FEET
	1000
CUBICIN
	500
FLOW	0
			0.05			0.15			0.25
				STATIC PRESSURE (in. wg)
		Fig. 23 — Barometric Flow Capacity
(cfm)	30
MINUTE
	25
PER	20
	15
FEET
	10
CUBICIN
	0
	5
FLOW	0.13		0.20	0.22	0.25	0.30	0.35	0.40	0.45	0.50
				STATIC PRESSURE (in. wg)
	Fig. 24 — Outdoor-Air Damper Leakage
(cfm)	6000
MINUTE	5000
PER	4000
	3000
FEET
	2000
CUBIC
	1000
IN
FLOW	0
	0.05		0.10		0.15	0.20	0.25		0.30	0.35

STATIC PRESSURE (in. wg)

Fig. 25 — Return-Air Pressure Drop

C. EconoMi$er+ Control Mode

Determine the EconoMi$er+ control mode before installing sensors and accessories. Different sensors are required for different control modes, and a number of accessories are available. Refer to Tables 3 and 4.

Outdoor Dry Bulb Changeover

The standard control mode for the EconoMi$er+ is Outdoor Dry Bulb Changeover. The outdoor air and supply air tem- perature sensors are also included as standard. EconoMi$er+ control is based on the outdoor temperature relative to a set point in the software. If the outdoor air

temperature is above the set point then the EconoMi$er should be in minimum position. If the outdoor air tempera- ture is below the set point, the position should be controlled to maintain the leaving air temperature set point. The set point range is 45 to 70 F.

Differential Dry Bulb Changeover

The control supports differential dry bulb changeover con- trol. This requires an accessory return air temperature sensor CRTEMPSN001A00 installed in the return air- stream. Refer to the Start-up section for details on how to configure and enable the control mode. The user can check the operation of the sensor using the Read function.

Outdoor Air Enthalpy Changeover

The control supports outside air enthalpy changeover con- trol. This mode requires a factory-supplied outdoor air tem- perature sensor (OAT) and an accessory outdoor air humidity sensor (ORH) (part no. CRHUMDSN001B00). Refer to the Start-Up section for details on how to configure and enable the control mode. The user can check the opera- tion of the sensors using the Read function.

Differential Enthalpy Changeover

The control supports differential enthalpy changeover con- trol. This requires the factory-supplied outside air tempera- ture sensor, an accessory outdoor air humidity sensor, an accessory return air temperature sensor, and an accessory indoor air humidity sensor. Refer to the Start-Up section for details on how to configure and enable the control mode. The user can check the operation of the sensors using the Read function.

D. Damper Movement

When the EconoMi$er+ board receives initial power, it will take the damper up to 21/2 minutes before it begins to posi- tion itself. After the initial positioning, subsequent changes to damper position will take up to 30 seconds to initiate. Damper movement from full open to full closed (or vice versa) takes 21/2 minutes.

If the damper is in the process of changing positions (for example it is trying to open to 100%) and the fan signal is turned off, the damper will continue to its 100% open posi- tion before closing.

NOTE: Occupied minimum position can not be set lower than +1% higher than the value of IAQ minimum economizer position. Refer to the setup examples on page 42.

E. EconoMi$er+ Controller Wiring

The EconoMi$er+ is supplied from the factory with a supply air temperature sensor and an outside air temperature sen- sor. This allows for operation of the EconoMi$er+ with out- side air dry bulb changeover control. Additional accessories can be added to allow for different types of change over con- trol and operation of the EconoMi$er+ and unit.

F. Thermostats

The EconoMi$er+ control works with conventional thermo- stats that have a Y1 (cool stage 1), Y2 (cool stage 2), W1 (heat stage 1), W2 (heat stage 2), and G (fan). The EconoMi$er+ control does not support sensor thermostats like the T56 and T57. Connections are made at the thermo- stat terminal connection board located in the main control box.

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