Rated Output Secondary Pump (Pwm) - Viessmann VITOTRONIC 200 Service Instructions Manual

7340 Operating mode secondary pump
Value Meaning
Central heating
"0" No switching via PWM signal, e.g. with standard circulation pump (multi stage)
"1" Switching via PWM signal:
Standard mode: 100 %/0 %
"2" Switching via PWM signal:
Operation with fixed speed
"3" Switching via PWM signal:
Speed is adjusted via output control (PID con-
troller), so that a constant temperature spread
results in the secondary circuit.
"4" Switching via PWM signal:
Speed control as for "3"
"5" : Regulating to a constant flow rate in the secondary circuit
"6" : Regulating to a constant flow rate in the secondary circuit: The current set flow rate is de-
pendent on the compressor speed.

7343 Rated output secondary pump (PWM)

The meaning depends on the setting of "Operating
mode secondary pump 7340".
Setting "7340" Meaning "7343"
"2" Speed specification for fixed speed
operation
"3" Start value for speed control
"4"
734A Rated output heating circuit pump HC2
Only in conjunction with the installation kit with mixer
("Type of assembly kit 7044" set to "1"):
The rated output of the circulation pump contained in
the integration kit with mixer for the heating circuit
M2/HC2 can be specified. For this, determine the
required flow rate. Then set the rated output in accord-
ance with the pump curve.
735A Secondary circuit pump type
Manufacturer of the secondary pump: Required in
order to process operating data of the circulation pump
in the heat pump control unit.
Parameter group Internal hydraulics
!
(cont.)
DHW heating
Switching via PWM signal:
Default speed 100 %
Switching via PWM signal:
Default speed 100 %
Switching via PWM signal:
Default speed 100 %
Switching via PWM signal:
Without cylinder loading system: Operating
■
mode set via "Operating mode cylinder pri-
mary pump 6020".
With cylinder loading system: Specified
■
speed 100 %
?
Note
The secondary pump will be controlled with the set
value after the compressor is started.
Setting in %
Note
■ Output control is switched off with setting "0". The
circulation pump is not switched on.
In order to prevent flow rate differences, the mini-
■
mum speed of the secondary pump is automatically
adjusted to the value set here for the heating circuit
pump M2/HC2.
Setting in %
!
Value Meaning
"0" Wilo
"1" Grundfos
231