Dantherm NF-8HD - DTC Mode 3 Operation; External Ap-Terminal Control

01AUG 1005GB Cat.20 / Tab. 05.91 / Page 05.06
DTC Mode 3:
Fig. 3: In DTC Mode 3 the down-time cleaning procedure is started when the pressure comes under the ∆p-
DTCmin limit, but only if the ∆p-DTCmax has been exceeded. The terminals E1 and E2 are not taken
into account.
Cleaning in connection with the start/stop output (external ∆p-terminal):
The terminals D1 and D2 can be bridged with a potentialfree switch. The cleaning procedure
can be seen from the below table:
„∆p-Mode OFF“
Switch (terminals D1,D2) Cleaning
open ON
closed OFF
„∆p-Mode ON“
Switch (terminals D1,D2)
Differential pressure ∆p
Cleaning
open
∆p > ∆p MAX
ON
closed
∆p > ∆p MAX
OFF
open
∆p < ∆p MIN
OFF
closed
∆p < ∆p MIN
ON
Delta-P DTCmax