Chapter 4: E2 Controller

Table 4-13. Factory>Group>Group Rotation (Screen 2) parameters.

Display

 

 

 

Description

Description

Variables

Default

 

 

 

 

 

This field only appears on the lead controller. If you select “On” and press ( ) it initiates

0= Off

 

Force Rotation

a manual rotation cycle to rotate duty between active and standby units. It also rotates

0

 

the role of lead controller. The fi eld will disappear after the role of Lead is rotated to

1= On 0

 

 

 

the next A/C unit.

 

 

 

 

 

 

 

 

Number of Days

Enter the number of days between rotating active units.

0 to 999

0

 

 

 

 

Hour of Day

Enter the hour of day for unit rotation to occur.

0 to 23

0

 

 

 

 

Cur Lead

Identifies which A/C unit controller is currently the lead unit in the group.

1 to 8

0

 

 

 

 

Next lead

Identifies which A/C unit controller is designated to be the next lead unit.

1 to 8

0

 

 

 

 

Rot Unit

Identifies which A/C unit is designated to be the next unit to rotate duty.

1 to 8

0

 

 

 

 

 

Identifies the duty of the A/C unit by displaying the variable number assigned in

 

 

Value

Factory>Group screen.

0 to 6

0

 

1 (0=Out of Service, 1=Active, 2=Standby, etc.).

Figure 4-78. Factory>Group> Capacity Assist (Screen 3).

Each A/C unit in the group may be assigned local cut-in and cut-out setpoints for its capacity assist operation. The values entered are offsets that are applied to the control setpoints established at the lead controller. Each unit in the group should be assigned incrementally increasing/decreasing offsets for cooling, humidifying, and dehumidifying so they will turn on one at a time only if the unit(s) currently operating are unable to satisfy the demand.

Table 4-14. Factory>Group> Capacity Assist (Screen 3) parameters.

Display

 

 

 

Description

Description

Variables

Default

 

 

 

 

Assist Time

Enter the delay period for capacity assist unit(s) to begin operating.

0 to 999

300

 

 

 

 

Cooling Cut in

Enter a temperature setpoint offset for cooling capacity assist operation to begin.

-99.9 to 99.9

1.0

 

 

 

 

Cut out

Enter a temperature setpoint offset for cooling capacity assist operation to stop.

-99.9 to 99.9

0.0

 

 

 

 

Figure 4-79. Factory>Group>Capacity Assist (Screen 4).

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Black Box CRDX-A-FS-24KW user manual FactoryGroupGroup Rotation Screen 2 parameters, FactoryGroupCapacity Assist Screen

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