OAD_CMD Outside Air Damper Command - Operation Manual - ELC.E14 - EM1.8D - EM1.8R - EM1.8U

Description

This function block set is used to control the start and stop of an on-off outside air damper. It can also control the damper to be shut down a certain time later after a supply fan is stopped. With the low limit temperature protection function, when activated, it closes the damper immediately.

Function

When "Unit Start/Stop" is "1" (ON) and "Low limit Temperature" is "0", "Outside Air Damper Command" is "1".

When "Unit Start/Stop" is "0" (OFF) and "Supply Fan Command" is "0" (OFF) and starts timing until "Damper On-Off Time Delay" has elapsed, "Outside Air Damper Command" is "0".

At any time when "Low limit Temperature" is "1", "Outside Air Damper Command" is "0".

Internal logic

Input

Output

Example