A direct-digital (DDC) field controller for RTUs typically actuates and monitors which of the following at minimum?
Choices
- (A) Structural steel rebar
- (B) Satisfy safety interlocks, supply fan, economizer, cooling and heating stages, and alarms to BMS (per I/O map)
- (C) Domestic only
- (D) Refrigerant charge from sight glass only
Correct answer: (B)
Satisfy safety interlocks, supply fan, economizer, cooling and heating stages, and alarms to BMS (per I/O map)
Explanation
BAS/DDC: points list, I/O, sequences of operation per ASHRAE Guideline 0 practice.