Bryant F Bedienungsanleitung PDF herunterladen (Seite 57)

The same equation can be used to determine the occupied

or maximum ventilation rate to the building. For example,

an out put of 3.6 volts to the actuator provides a base

ventilation rate of 5% and an output of 6.7 volts provides

the maximum ventilation rate of 20% (or base plus 15 cfm

per person). Use Fig. 72 to determine the maximum

setting of the CO

sensor. For example, an 1100 ppm

setpoint relates to a 15 cfm per person design. Use the

1100 ppm curve on Fig. 72 to find the point when the CO

sensor output will be 6.7 volts. Line up t he point on the

graph with the left side of the chart to determine that the

range configuration for the CO

sensor should be 1800

ppm. The EconoMi$er IV controller will output the 6.7

volts from the CO

sensor to the actuator when the CO

conce ntration in the space is at 1100 ppm. The DCV

setpoint may be left at 2 volt s since the CO

sensor

voltage will be ignored by the EconoMi$er IV controller

until it rises a bove the 3. 6 volt setting of the minimum

position potentiometer.

Once the fully occupied damper position has been

determined, set the maximum damper demand control

ventilation potentiometer to this position. Do not set to the

maximum position as this can result in over-ventilation to

the space and potential high humidity levels.

Sensor Configuration

The CO

sensor has preset standard voltage settings that

can be selected anytime after the sensor is powered up.

(See Table 23.)

Use setting 1 or 2 for Bryant equipment. (See Table 23.)

1. Press Clear and Mode buttons. Hold at least 5

seconds until the sensor enter s the Edit mode.

2. Press Mode twice. The STDSET Menu will appear.

Table23–CO

Sensor Standard Settings

SETTING EQUIPMENT OUTPUT

VENTILATION

RATE

(cfm/Person)

ANALOG

OUTPUT

CONTROL

RANGE

(ppm)

OPTIONAL

RELAY SETPOINT

(ppm)

RELAY

HYSTERESIS

(ppm)

Interface w/Standard

Building Control System

Proportional Any

0 --- 1 0 V

4 --- 2 0 m A

0---2000 1000 50

2 Proportional Any

2 --- 1 0 V

7 --- 2 0 m A

0---2000 1000 50

3 Exponential Any

0 --- 1 0 V

4 --- 2 0 m A

0---2000 1100 50

Economizer

Proportional 15

0 --- 1 0 V

4 --- 2 0 m A

0---1100 1100 50

5 Proportional 20

0 --- 1 0 V

4 --- 2 0 m A

0 --- 9 0 0 900 50

6 Exponential 15

0 --- 1 0 V

4 --- 2 0 m A

0---1100 1100 50

7 Exponential 20

0 --- 1 0 V

4 --- 2 0 m A

0 --- 9 0 0 900 50

8 Health & Safety Proportional —

0 --- 1 0 V

4 --- 2 0 m A

0---9999 5000 500

Parking/Air Intakes/

Loading Docks

Proportional —

0 --- 1 0 V

4 --- 2 0 m A

0---2000 700 50

580J

1 2 ... 52 53 54 55 56 57 58 59 60 61 62 ... 84 85

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