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5797 340 - 01
Vitoflex 300-RF Installation & Operating
Parameters
Flow
“Settings” tab
Parameters
Description
Setting in
Setting
range
Default
value
“Flow temperature” Supply temperature
(°F)
°C
(167 to 203)
75 to 95
(185)
85
“Return temperature,
minimum”
Minimum return temperature
(°F) °C
°C
(°F)
Min. setting
65°C (149°F)
Note:
max.
setting ‘flow
temp.’ less 5°C
(9°F)
70
(158)
“Return temperature,
calculated”
Displays the sliding set value for the return temperature
Only if flow control is activated, see page 56.
“Dissipate excess
heat”
If the boiler water temperature rises above this temperature,
a floating contact is switched. The contact is provided for
on-site actuation of heat consumers.
(°F)
°C
Max. setting
105°C (221°F)
Note:
min.
setting ‘flow
temp.’ less 2°C
(4°F)
(203)
95
“Runtime, boiler
valve”
Runtime of boiler valve
Actual: Displays the valve position in % of greatest opening
seconds
80 to 500
140
“Runtime, boiler
circuit pump,
minimum”
Minimum boiler circuit pump runtime
minutes
1 to 30
10
“Minimum system
temperature, actual”
Selection of whether a minimum system temperature
is specified
If the parameter is set to “Yes”, input the required
minimum set value for the system temperature.
Actual: Set minimum system temperature
Via
selection
“Yes”/”No”
”No”
“Minimum system
temperature”
If the “Minimum system temperature, actual” parameter
was set to “Yes”, a minimum set value can be entered for
the system temperature.
(°F)
°C
(122 to 194)
50 to 90
(158)
70
“Flow temperature
max”
Maximum supply
temperature
If the supply temperature
rises above “Flow
temperature max”, the
system is automatically
shut down after the set
“Flow temperature, delay”
has elapsed.
(°F)
°C
Max. setting
96°C (205°F)
Note:
min.
setting ‘flow
temp.’ plus 1°C
(2°F)
(194)
90
“Flow temperature,
delay”
Switching delay for shutting
down
minutes
1 to 60
1