Activating Screed Drying; Adjusting The Pump Rate Of The Integral Circulation Pump - Viessmann VITODENS 222-F Installation And Service Instructions Manual

Commissioning, inspection, maintenance

Activating screed drying

Screed drying
6 different temperature profiles can be set for screed
drying:
Preset temperature profiles can be set via parameter
897.0 "Screed drying" in the General group.

Adjusting the pump rate of the integral circulation pump

The pump speed and consequently the pump rate are
regulated subject to the outside temperature and the
switching times for heating mode or reduced mode.
The minimum and maximum speeds for heating mode
can be matched to the existing heating system at the
control unit.
Setting (%) in the "Heating circuit 1" group:
Min. speed: Parameter 1102.0
■
Max. speed: Parameter 1102.1
■
Residual head of integral circulation pump
19 to 25 kW
550 55
L
500 50
450 45 K
400 40
H
350 35
300 30
G
250 25
F
200 20
150 15
E
100 10
D
50
5
C
A B
0 0
0 100 200
Flow rate in l/h
Fig. 30
Operating range upper limit
M
38
300 400 500 600 700
For further details, see "Function description".
■ In the delivered condition, the minimum pump rate
and the maximum pump rate are set to the following
values:
Rated heating output
in kW
19
25
32
■ In conjunction with a low loss header, heating water
buffer cylinder and heating circuits with mixer, the
internal circulation pump runs at a constant speed.
Speed setting (%): Parameter 1100.2 in the Boiler
group
M
800 900 1000 1100 1200
Speed settings in the
delivered condition in %
Min. pump Max. pump
rate rate
50 75
50 95
40 100