Bryant DuraPac Series 580f User Manual download pdf (Page 17)

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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 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 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.

500

1000

1500

2000

2500

0.05

0.15

0.25

STATIC PRESSURE (in. wg)

FLOW IN CUBIC FEET PER MINUTE (cfm)

0.13 0.20 0.22 0.25 0.30 0.35 0.40 0.45 0.50

STATIC PRESSURE (in. wg)

FLOW IN CUBIC FEET PER MINUTE (cfm)

1000

2000

3000

4000

5000

6000

0.05 0.10 0.15 0.20 0.25 0.30 0.35

STATIC PRESSURE (in. wg)

FLOW IN CUBIC FEET PER MINUTE (cfm)

Fig. 23 — Barometric Flow Capacity

Fig. 24 — Outdoor-Air Damper Leakage

Fig. 25 — Return-Air Pressure Drop

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 63 64

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Bryant DuraPac Series 580f User Manual Page 17

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