Buderus AM200 Notice D'installation page 21

Buffer primary pump
Menu item Setting area: function description
Config. pump Yes: primary pump connected to module (PR1).
No: no primary pump connected to module.
Output for pump On/Off: the pump at the alternative heat source is
activated via an On/Off signal.
Note: if DHW is heated in the upper part of the buffer
cylinder, set the output of the pump as low as possible
to prevent blending.
PWM: the pump at the alternative heat source is variably
activated via a pulse width modulation signal.
Inv.PWM: the pump at the alternative heat source is
variably activated via an inverted pulse width
modulation signal (pump with solar characteristics).
0-10V: the pump at the alternative heat source is
variably activated via a 0-10 V signal.
Min. output of pump 12 ... 35 ... 50 %: the lowest permitted output of the
primary pump during normal operation. The setting
value is specified as a percentage of the maximum pump
output.
Temp.: the pump at the alternative heat source is
Start conf. pump
started if temperature sensor TA1/TF1 detects heat in
the alternative heat source.
AHS: the pump at the alternative heat source starts at
the same time as the alternative heat source (e.g. pellet
stove with On/Off or 0-10 V signal input required).
Table 8 Buffer primary pump
Mixer return AHS
Menu item Setting area: function description
AHS return temp rise Yes: mixer for return temperature increase at
alternative heat source is connected to module (VR1).
The module controls the mixer in such a way that the
primary cylinder and heating system are bypassed until
the required minimum return temperature at the
alternative heat source is reached.
No: no return temperature increase
Mixer run time 0 ... 120 ... 600 s: maximum mixer operating time for
return temperature increase.
Set temp. return 40 ... 60 ... 75 °C: this set temperature should be
reached during return temperature increase.
Notice: to avoid damage, observe the manufacturer's
specifications for the minimum return temperature of
the alternative heat source.
If a thermal mixer is used, the temperature set at the
thermal mixer must be specified.
Table 9 Mixer return AHS
AM200 – 6720884574 (2018/04)
Buffer
Menu item Setting area: function description
Set flow temp. AHS 40* ... 70 ... 75 °C: set temperature for charging of the
buffer cylinder, the primary pump modulates via the
sensor TA1 with reference to the value set here.
Can only be adjusted with a primary pump connected to
the module.
Notice: observe manufacturer's specifications for the
maximum permissible temperature of the alternative heat
source! We recommend you adjust the set temperature so
it is 5 K below the maximum permissible temperature.
Note: if the buffer cylinder is not charged via the module
(Config. pump: No and Alt. heat source activation: Yes),
the menu remains Set flow temp. AHS visible. In this
case, the Set flow temp. AHS is used to apply a limit
during external charging.
* the value cannot be less than the set temperature
specified for the return temperature increase
(set temp. return)
Buffer bypass Mixer: mixer bypassing the buffer cylinder connected to
the module (VB1).
Valve: 3-way diverter valve for bypassing the buffer
cylinder connected to the module (VB1).
No: no bypass valve for bypassing the buffer cylinder
connected to the module.
Bypass mixer run time 0 ... 120 ... 600 s: maximum elapsed time of mixer/
valve for bypassing buffer cylinder..
DHW via buffer Yes: buffer cylinder is used for DHW heating.
No: no DHW heating via buffer cylinder.
Config. DHW cylinder Notice: a default setting does not exist. During
commissioning, either "Dual: DWH..." or "Mono:
DHW..." must be set without fail!
Dual: DHW is heated passively via buffer cylinder
(e.g. Tank in Tank, combi buffer cylinder with DHW part,
freshwater station, buffer cylinder with DHW in upper
area).
Mono: DHW is actively heated via buffer cylinder
(e.g. DHW cylinder heated by single heat source with
primary pump or 3-way valve)
Table 10 Buffer
Blocking mode
Menu item Setting area: function description
Config. htg. Never: if a conventional heat source is connected, this
1)
blocking mode responds to heat requirements of the heating system
independently of the alternative heat source.
Autom.: the conventional heat source is released if the
alternative heat source cannot heat the buffer cylinder.
Otherwise the conventional heat source remains
blocked until the waiting time to be observed before the
boiler is released has elapsed.
Always: the conventional heat source is permanently
blocked for the heat energy demand.
Conf. DHW Never: if a conventional heat source is connected, this
1)
blocking mode responds to heat requirements for DHW independently
of the alternative heat source.
Autom.: the conventional heat source is released if the
alternative heat source cannot heat the buffer cylinder.
Otherwise the conventional heat source remains blocked.
Always: the conventional heat source is permanently
blocked for the DHW demand.
4
Commissioning
21