Selecting The Boiler Sequence (If Required); Connecting The Control Unit To The Lon System - Viessmann VITOTRONIC 200 Installation And Service Instructions Manual

Vitotronic 200, HO1B and 300-K, MW2C Installation/Service
Selecting the Boiler Sequence

Connecting the Control Unit to the LON System

Installation and service
instructions, Vitotronic 200-H
Example of a multi boiler system
Using KMK boiler communication to the Vitotronic 300-K
Legend
A Vitodens 200-W
B Vitodens 200-W
C Vitotronic 300-K
D Vitotronic 200-H
E Vitocom
F LON system
(if required)
Subject to the coding set in the "Cascade" group and
internal control calculations, the control unit offers various
boiler sequences. Coding that influence the boiler
sequence:
"38"
"39"
"3a"
"41" to "44" ECO thresholds
"65", "6f"
"74", "7d"
H Via the ECO threshold, every boiler can be blocked or
enabled subject to the outdoor temperature.
H The ECO threshold has no effect if a boiler is required
to achieve the set supply temperature in the case of
enabled boilers failing.
H At least the lead boiler remains in operation when all
boilers in a system would otherwise be blocked by the
ECO threshold.
From the home screen tap the following buttons:
1. Tap "Menu".
2. "Boiler sequence"
3. Select the required boiler sequence and confirm with
"OK".
Vitotronic 300-K and 200-H:
H
The LON communication module (accessories) must
be fitted.
Within one LON, the same participant number must
H
not be allocated twice.
Within one LON, the system number (coding "98"
H
in the "General" group) must always be the same.
Only one Vitotronic may be selected as fault manager.
H
The data transfer via LON can take several minutes.
H
LON communication is for LON equipped accessories,
H
communication between the Vitodens and the
Vitotronic 300-K is the KMK bus.
Commissioning
Changing the lead boiler and the boiler sequence
Permanent lead boiler
Permanent last boiler
ECO thresholds
ECO thresholds
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