Set Values For Compressor - Viessmann PLC VITOCAL 350-HT PRO Service Instructions For Contractors

Adjusting set values

Set values for compressor

Launch with
■ "Menu"
■ "Set val."
■ "Comprssr"
Fig. 16
The following settings can be changed:
"Restart block"
■
Duration of restart block
■ "Oil sump heating max. not running"
Period of time until the compressor is blocked by the
oil sump heater.
"Oil sump htg min op. time before comprssr
■
start"
Duration of blocking by the oil sump heater (after the
oil sump heater has started up again)
■ "Min. oil press. diff."
When the oil pressure differential has been under-
shot for more than 45 s, a fault is triggered
(cont.)
"Min. time betw. compressor starts"
■
Minimum waiting time between starts of the individ-
ual compressors
■ "Reduction, t maint. before compressor start"
The temperature for high temperature maintenance
has to drop below this temperature before a com-
pressor can start up.
Note
To allow the high temperature maintenance function
to respond sufficiently quickly, the value must not be
too high.
The value should not be too high because when a
compressor starts up, the output increases and the
condensation temperature rises.
Configuring the system
23