6.13 Solid Fuel Boiler - Siemens AVS75.39 Series User Manual

Overview
Operating mode
Locks other heat sources
Charging priority DHW
storage tank
Setpoints
Setpoint min
Temperature differential
minimum
Temperature differential
ON
120 / 239
Siemens
Building Technologies

6.13 Solid fuel boiler

B22
B72
Q10
Y25/Y26
Line no. Operating line
4102 Locks other heat sources
4103 Charg prio DHW stor tank
Off ¦ On
When the solid fuel boiler is put into operation, other heat sources, such as oil / gas
boilers, will be locked.
Locking takes place as soon as an increase of the boiler temperature is detected.
This predictive function allows locked heat sources to end any overrun of pumps
before the solid fuel boiler pump is activated.
Also, in the case of a common flueway, it can be made certain that only one boiler
is in operation at a time.
When the solid fuel boiler is in operation, the DHW storage tank can be charged
with priority (on) against the other consumers.
When selecting "Off", normal DHW charging priority applies (line 1630).
Line no. Operating line
4110 Setpoint min
4114 Temp differential min
4130 Temp diff on
The boiler pump is starts up the boiler temperature has reached the minimum level
and the temperature differential reaches ON.
The pump is shut off again after the overrun if the boiler temperature drops below
the minimum level.
The pump is shut off after overrun when the temperature differential (difference
between the boiler temperature and return temperature) is too small.
The temperature differential is calculated from the boiler temperature and the
return setpoint minimum (e.g. when using a thermal return temperature controller).
See description for setpoint minimum.
User manual RVS43.345
The settings in detail
At a sufficiently high solid fuel boiler temperature, the
boiler pump is switched on and the DHW storage and/or
buffer storage tank is heated.
The solid fuel boiler can in principle only be operated
Only with boiler sensor B22, or
With boiler sensor B22 and return sensor B72.
CE1U2354en_021
2013-09-02