Parameter

Description

Value/Range

Default

3FREEZE POS

Anti-freeze protection damper position (closed or minimum) when the Controller is under MAT-based anti-freeze protection.

CLO

MIN

CLO

3STG3 DLY

Highest stage cooling delay time

0...240m;

increment by 5

15m

3SD ACT POS

Damper position during shutdown (open or closed)

CLO

OPN

CLO

3DIF T LOC

MAT sensor location:

  • Choose 'MAT' if the sensor is installed before the DX (Direct Expansion) coil.
  • Choose 'LAT' if the sensor is installed after the DX coil.
  • Choose 'AUTO' to let the Economizer Controller automatically detect the location.

MAT

LAT

AUTO

LAT

3LAT LOW

Low limit of leaving air temperature (For 4LLA ALARM)

Dynamic item. Appears only if 'LAT' or 'AUTO' is selected for '3DIF T LOC'.

35...65 °F;

increment by 1

45 °F

3LAT HIGH

High limit of leaving air temperature (For 4HLA ALARM)

Dynamic item. Appears only if 'LAT' or 'AUTO' is selected for '3DIF T LOC'.

70...158 °F;

increment by 1

80 °F

3OAT CAL

OAT sensor calibration

-2.5...2.5 °F;

increment by 0.5

0 °F

3RAT CAL

RAT sensor calibration

Dynamic item. Appears only if an RAT sensor is configured.

3OAH CAL

OAH sensor calibration

Dynamic item. Appears only if an OAH sensor is configured.

-10...10%;

increment by 0.5

0%

3RAH CAL

RAH sensor calibration

Dynamic item. Appears only if an RAH sensor is configured.

3MAT CAL

MAT or LAT sensor calibration

-2.5...2.5 °F;

increment by 0.5

0 °F

3MAT SET

Setpoint of MAT or LAT sensor

38...70 °F;

increment by 1

53 °F

3FRZ PROT

Anti-freeze protection setpoint of MAT sensor

35...55 °F;

increment by 1

45 °F

3ACT TOLR

Actuator tolerance setpoint between output (in percentage) and feedback (in percentage).

0...15%;

increment by 1

8%

3OAT LOCK

OAT lockout setpoint for anti-freeze protection

20...45 °F;

increment by 1

32 °F