Orion-system SA Controller Manual de usuario descargar pdf (Pagina 30)

Zone

Programming

SA Controller Operator Interface

Setpoint Screen #19 - Static Setpoint,

Deadband & Control Rate

SA Unit Spts ID 102

Static Spt...: 0.50”

Deadband.....: 0.10”

Control Rate.: 10 s

For VAV units, a Supply Fan VFD or Bypass Damper Actuator is used to

maintain the Duct Static Pressure Setpoint. The Static Pressure Output

Signal varies to control the Static Pressure Setpoint. If the Duct Static

Pressure is above the Static Setpoint plus the Deadband, the Static Pres-

sure Output Signal will be reduced at every Control Rate interval. If the

Static Pressure is below the Static Setpoint minus the Deadband, the

Output signal will be increased at every Control Rate interval.

The Duct Static Pressure Control Output Signal is a non-conﬁ gurable

Direct Acting Signal (0-10 VDC). This can be used to directly connect

to a Supply Fan VFD without any modiﬁ cations.

When you are using a Bypass Damper Actuator to control the Duct

Static Pressure, you must set up the Bypass Damper Actuator or the

Bypass Damper so that it is Reverse Acting in operation. The Output

Signal increases (closes Bypass Damper) if the Duct Static Pressure is

below the Duct Static Pressure Setpoint by the Deadband amount and

the Output Signal decreases (opens Bypass Damper) if the Static Pres-

sure is above the Setpoint by the Deadband amount.

Description Minimum Default Maximum

Static Spt 0.10″ WG 0.50″ WG 3.0″ WG

Deadband 0.10″ WG 0.10″ WG 1.0″ WG

Control Rate 1 Sec 10 Sec 30 Sec

SA Controller Setpoint Screens

Setpoint Screen #17 - Head Pressure Output

Minimum Position Setpoint

SA Unit Spts ID 102

Head Pressure

Output Min Position

Setpoint: 35%

This is the minimum position the Condenser Water Valve or the Con-

denser Fan will be allowed to modulate down to when the compressors

are active. This will ensure adequate water ﬂ ow or airﬂ ow during

compressor cooling operation. For a Water Cooled Condenser, a proper

setting will prevent the Water Flow Switch from opening which would

create a proof of water ﬂ ow Failure.

Description Minimum Default Maximum

Head Pressure Output

Minimum Position Setpoint

0% 35% 100%

Setpoint Screen #18 - Water Side Economizer

Setpoints

SA Unit Spts ID 102

Water Side Econo

Delta Spt: 10ºF

Deadband: 2ºF

If an Entering Air Humidity Sensor is not connected to the SA Control-

ler and the Entering Air Temperature falls below the Delta Setpoint, the

Economizer can be used for Free Cooling. If an Entering Air Humidity

Sensor is connected to the SA Controller, then a Wetbulb Temperature

will be calculated and used instead of the Entering Air Drybulb Tem-

perature to determine when Free Cooling can be used.

Description Minimum Default Maximum

WS Econo Delta Setpoint 3ºF 10ºF 20ºF

WS Econo Deadband 2ºF 2ºF 10ºF

1 2 ... 25 26 27 28 29 30 31 32 33 34 35 ... 67 68

Comentarios a estos manuales

Sin comentarios

Orion-system SA Controller Manual de usuario Pagina 30

Comentarios a estos manuales

Relacionado con productos y manuales para Hardware Orion-system SA Controller