HRW HPD0440BNMR V401 Manual 111116.doc E. & O. E. / Subject to change without notice Page 25 of 43
Digital Logic (DL) & Analogue Logic (AL)
The Digital Logic and Analogue Logic block statuses may be displayed by entering D1, D2… D8 or A1,
A2… A8 respectively. Below is the display of the active Digital Logic blocks of the subject application:
DL1, Point 37 – OR function for BMS or Local enable; either VDI1 (point 29) or DI1 (point 1)
being high will result in point 37 being high
DL2, Point 38 – OR function for release of SA cooling when the room cooling loop (point 69)
has demand present
DL3, Point 39 – OR function for release of SA heating when the room heating loop (point 71)
has demand present
AL1, Point 53 – Proportion (shift) function; CL1 output (point 69, room cooling demand)
proportionally shifts the supply air cooling set point from 22°C down to 12°C
AL2, Point 54 – Proportion (shift) function; CL3 output (point 71, room heating demand)
proportionally shifts the supply air heating set point from 22°C up to 35°C