Advanced Quieter Operation; Setting The Time Program For Quieter Operation; Operating Status For Quieter Operation; Switching Emergency Mode On/Off - Viessmann VITOCAL 150-A Operating Instructions For The System User

Quieter operation

Setting the time program for quieter operation

In the time program for quieter operation, set the time
phases in which the speed of the fan and, if required,
of the compressor are limited.
To do so, select an operating status for each time
phase: See chapter "Operating status for quieter oper-
ation".
Factory setting: No time phase from 00:00 to 24:00 h
for every day of the week. The fan speed is not limited.
Tap the following buttons:
1.
2. "Advanced"
3. "Quieter operation"
4. "Time program"

Operating status for quieter operation

You can choose between 2 operating statuses:

Switching emergency mode on/off

In emergency mode, the outdoor unit is switched off.
The room heating and DHW heating is done by instan-
taneous heating water heater built into the indoor unit.
In emergency mode, room cooling is switched off.
Tap the following buttons:
1.
5. Set the required time phases and operating status.
■ to change the time phase
■ for a new time phase
■ to delete a time phase.
to select the time phase if more than one
■
time phase is set.
Note
■ The fan speed is not limited between the set time
phases.
If your heating contractor has blocked the quieter
■
operation setting, "Cannot be changed" is shown
for 4 s. Your contractor can unlock the controls. You
can check a time program set by the contractor for
quieter operation under "Information".
For how to set a time program: See page 19.
■ "Slight"
The max. fan speed and, if required, that of the com-
pressor are reduced by a small amount.
"Significant"
■
The max. fan speed and, if required, that of the com-
pressor are reduced by a large amount.
2. "Advanced"
3.
4. Emergency mode "ON"
or
Emergency mode "OFF"
Advanced
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