Adjusting The Heating Curves (Only For Weather- Compensated Control Units) - Viessmann VITOLADENS 300-W Installation And Service Instructions Manual

Commissioning, inspection, maintenance
Further details regarding the individual steps
qQ Heating circuit with mixer M3
(heating circuit 3)
qW Temperature limiter to restrict the
maximum temperature of underfloor
heating systems
qE Flow temperature sensor M3
Function/system components
System only with two heating circuits with mixer with
extension kit for mixer (without unregulated heating
circuit)
■ With DHW cylinder
■ Without DHW cylinder
DHW circulation pump connection at extension AM1,
terminal A2
Adjusting the heating curves (only for weather-compensated
control units)
The heating curves illustrate the relation-
ship between the outside temperature
and the boiler water or flow tempera-
ture.
To put it simply, the lower the outside
temperature, the higher the boiler water
or flow temperature.
The boiler water or flow temperature in
turn affects the room temperature.
Settings in the delivered condition:
■ Slope = 1.4
■ Level = 0
48
(cont.)
qR Heating circuit pump M3
qT Extension kit for one heating circuit
with mixer M3
qZ Low loss header
qU Flow temperature sensor, low loss
header
Adjust
Note
If the heating system includes heating
circuits with mixers, then the flow tem-
perature of the heating circuit without
mixer is higher by a selected differential
(8 K in the delivered condition) than the
flow temperature of the heating circuits
with mixers.
The differential temperature is adjusta-
ble via coding address "9F" in the "Gen-
eral" group.
Code
Group
00:8 "General"
00:7 "General"
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