Screed Drying - Viessmann VITOCROSSAL Service Instructions Manual

Function description
Control functions
(cont.)
Plug lH
■ The function is selected via code 4b:1 in the "Gen-
eral"/1 group.
The effect on the circulation pump for cylinder heat-
■
ing is selected with code 5F in the "DHW"/3 group.
The effect on the relevant heating circuit pump is
■
selected with code "d7" in the "Heating circuit"
group.
External demand
Input DE1
Input DE2
Input DE3
■ The effect on the circulation pump for cylinder heat-
ing is selected with code 5F in the "DHW"/3 group.
■ The effect on the relevant heating circuit pump is
selected with code "d7" in the "Heating circuit"
group.
The minimum set boiler water temperature for exter-
■
nal demand is selected in coding address "9b".

Screed drying

The screed drying function enables screeds to be
dried. For this, observe the screed manufacturer's
instructions.
When screed drying is enabled, the heating circuit
pump for the heating circuit with mixer starts and the
flow temperature is maintained in accordance with the
selected profile. On completion (30 days), the heating
circuit with mixer is regulated automatically according
to the set parameters.
Observe EN 1264. The report to be provided by the
heating contractor must contain the following details
regarding heat-up:
Temperature profile 1: (to EN 1264-4) code "F1:1"
ϑ/°C
50
40
30
20
10
1 5 10 15 20
Fig. 49
Temperature profile 2: (acc. to ZV parquet and flooring technology) code "F1:2"
ϑ/°C
50
40
30
20
10
1 5 10 15 20
Fig. 50
88
25 30
t/d
25 30 t/d
EA1 extension
The "External demand" function is implemented via the
EA1 extension. There are 3 inputs available at the EA1
extension (DE1 to DE3).
The function is selected via the following codes:
■ Heat-up data with the relevant flow temperatures
■ Max. flow temperature achieved
Operating state and outside temperature during
■
handover
The various temperature profiles are adjustable via
coding address "F1".
The function continues after a power failure or after the
control unit has been switched off. "Heating and DHW"
is started if screed drying is finished or if code "F1:0" is
set manually.
Code
3A:2
3b:2
3C:2