Bosch HPC 400 - Troubleshooting Common Faults; Eliminating Sensed Faults; Removing a Displayed Fault

Service menu
Control types for the heating system
NonCE: System damage!
In case of non-observance of the permissible operating
temperatures of plastic pipes (on the secondary side)
system parts can be damaged .
~ Do not exceed the permissible set value .
•
With weather-compensated control . only summer mode. setback
mode or damping of the outside temperature (through reduced heat
energy demand due to good thermal insulation) can lead to the
heating pump being switched off .
-
The room influence can be set in the Set heating curve menu.
The room influence affects both weather-compensated control
types. The room influence function is only available if a remote
Menu for setting of the heating curve
BOSCH
control or a room temperature sensor is installed in a suitable
reference room .
- Outdoor-temp_-compensated (Default setting)
- Outside temp_ with low end : ~ Simple heating curve . page 21.
Set the heating system and heating curve for weather-compensated
control
~ Set the heating type (radiator . convector or underfloor heating
system) in the Set heating/cooling> Heating eircuit 1 ... 4 >
Heating system heat eirc.l menu .
~ Set the control type (weather-compensated or weather -
compensated with base point) in the Ctrl type h. circ. 1 menu .
Menu items that are not required for the selected heating system and
control type are disabled . The settings only apply for the selected
heating circuit. if available.
or
End point
(radiator/convector)
30 ... 45 ... 60·C
The design temperature is only available with weather-compensated control without base point. The design
temperature is the flow temperature that is reached when the outside temperature is at the min i mum and .
thus. affects the steepness/inclination of the heating curve .
(underfloor heating system) The end point is only available with weather-compensated control with base point (simple heating curve) .
I
The end point is the flow temperature that is reached when the outside temperature is atthe minimum and .
thus . affects the steepness/inclination of the heating curve . If the base point is set to above 30 ·C. the base I
is the minimum value for the end I
Base point _ ~ O ... 25·C ... End:oint
The base point of the heating curve is only available with weather-compensated control with a simple
heating curve.
Max. flow temperature 30 ... 75 ... 85·C
Maximum flow temperature
(radiator/convector)
30 ... 48 ... 60OC
I (underfloor heating system)
Solar influence
- 5 .. . - 1 K Within certain limits. the
tnewe,ltnE !r- C(lmrlens;ated control (the additional heat
Room influence
The weather·compensated control functions of the room temperature .
Deviations in the room temperature by the set amount are offset by parallel displacement of the heating
curve (only available if a remote control or a room temperature sensor is installed in a suitable reference
room) . The higher the setting value. the greater the maximum possible influence of the room temperature
I on the heating curve will be .
I Room temp -e- ra - tu - re - o- ff - se -t -t--- - 10 ... 0 ... 10 K ---, Parallel displacement of the heating curve (e.g . when the room temperature measured with a thermometer
1 I deviates from the set set value)
Table 28 Set heating curve menu
The heating curve is the decisive basic factor for an economic and
convenient operation of the heating system with weather-compensated
control. To calculate the heating curve . the control system requires you
to enter a number of parameters for the heating system. from which it
automatically calculates the optimum heating curve by means of a
mathematical formula .
This calculation takes into account the adjusted outside temperature
and the room control temperature . The room control temperature is an
internal operand based on the desired room temperature (set room
temperature) and the room influence factor.
This allows the end customer to influence the heat i ng curve directly by
modifying the set room temperature .
The most important settings are the design temperature . maximum flow
temperature. room temperature offset (parallel displacement) and
minimum outside temperature .
The heating curve (~ Fig. 8 and 9) is mainly determined by the base
point and end point. The base point is located at 25 DC flow temperature
at a room temperature of 21 DC with an adjusted outside temperature of
20 D C. The end point of the heating curve must be set according to the
design temperature of the heating system .
The course of the heating curve (inclination/steepness) is determined
by the parameters minimum outside temperature (~ page 17) and
design temperature (the flow temperature at minimum outside
temperature) (~F i g. 8 and 9. left).
The heating curve can be shifted up or down parallel to the original curve
by adjusting the room temperature offset parameter and/or the set room
temperature (~ Fig . 8 and 9. right) .