Viessmann Vitocrossal 300 Service Instructions For Contractors page 120

Function description
Control functions
External demand
Input DE1
Input DE2
Input DE3
The effect on the circulation pump for
cylinder heating is selected with code
5F.
The effect on the relevant heating circuit
pump is selected with code d7.
Screed drying function
The screed function enables screeds to
be dried. For this, always observe the
details specified by the screed manufac-
turer.
When the screed drying function is acti-
vated, the heating circuit pump of the
mixer circuit is switched on and the flow
temperature will be held in accordance
with the selected profile. After comple-
tion (30 days), the mixer circuit will again
be regulated automatically via the set
parameters.
Observe EN 1264. The report to be pro-
vided by the heating contractor must
contain the following heat-up details:
Temperature profile 1: (EN 1264-4) code "F1:1"
50
40
30
20
10
1 5
120
(cont.)
10 15 20
The minimum set boiler water tempera-
ture in case of external demand is selec-
ted in coding address "9b".
■ Heat-up data with respective flow tem-
peratures
■ Max. flow temperature achieved
■ Operating conditions and outside tem-
perature during handover
The various temperature profiles are
adjustable via coding address "F1".
The function continues after power fail-
ure or after the control unit has been
switched off. "Heating and DHW" will be
started after the screed drying function
has been terminated or if code "F1:0" is
manually adjusted.
25 30
Days
Code
3A:2
3b:2
3C:2