Functions; Operating Conditions - Viessmann Cascade control unit Installation, Operating And Service Instructions

Weather-compensated cascade control for up to four gas fired wall-mounted boilers
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Operating conditions

You can scan the operating conditions from the "Operating details" menu in
the "Multi-boiler control unit" function area (see page 15).
The following operating conditions may apply:
H Standard mode (standard room temperature, e.g. day)
H Reduced mode (reduced room temperature, e.g. night)
H Holiday mode (reduced room temperature, e.g. holiday periods)
H Standby mode (the system is not operational)
H Fault
Subject to the current operating state, certain components are either
operational or not, and those set values which control the various functions
therefore change.
Set room temperatures can be adjusted in the "Set values" menu (see
page 16).
In some cases, the reason for the prevailing operating condition will be
displayed, e.g.
"External demand":
Displaying the control state
The following status indications can be displayed:
Multi-boiler control unit
Flow
Actual
Status display
fault
The control unit is in standard mode, as the
"External demand" function is active.
(Status display)
Display of set flow and actual flow temperatures.
20ºC
20ºC
This is displayed if there is a fault.

Functions

17

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