Limited effect geothermal heating
There are two heating circuits (H1 and H2)
and one domestic hot water regulating
circuit (HW) in the 203GT.
A compressor running command is given
or
+
-
or
The compressor stops running (relay 2 is inactive, strip connector space 71-72 opens) when
+
and
+
and
+
Compressor running is inhibited
The electrical heating resistor switches on when
-
-
or
The electrical heating resistor switches off (relay 1 is active, strip connector space 73-74 opens), when
-
and
Heating with electrical heating resistance is inhibited,
- when the temp. of the accumulator's upper part (meas. 9) drops below the [
/2)]
- when the temperature of the accumulator's lower part (meas. 10) drops below the [
5° C
”
”]
- when the temperature of the accumulator's lower part is below the “
” setting
- the temperature of the accumulator's upper part (meas. 9) rises above the [
(
/ 2)]
temperature
- the temp. of the accumulator's lower part (meas. 10) rises above the [
5°C]
the [”
” “
”] temperature
(the compressor does not run)
- if under 5 minutes has lapsed since the last running period
- if the hot gas temp. measurement (meas. 11) is connected and the temp. of the hot gas exceeds 120° C (the compressor
can start up when the temperature has dropped to 117° C).
- if the temp. of the accumulator's upper part (meas. 9) exceeds 95° C (the compressor can start up when the temperature
has dropped to 85° C)
- if the temperature of the controller's lower part exceeds the calculated “Lower part maximum limit” (53...55°C). The
compressor can start up when the temperature of the accumulator's lower part has dropped 3° C below the calculated
“Lower part maximum limit”.
- the temperature of the accumulator's upper part (meas. 9) drops below the [
(
/ 2)
”El.HeatUppHyst”] temperature
- the temperature of the accumulator's upper part (meas. 9) is below
the [
“
”].
- the temperature of the accumulator's upper part (meas. 9) exceeds the [
(“
” / 2)]
temperature
- the temperature of the accumulator's upper part exceeds the
.
- if the temperature of measurement 9 exceeds 95° C, the temperature must drop to 85° C before the electrical heating
resistor can switch on
Upper part setting
“AccumUppHyst”
controller indicated H1 supply water
temp
AccumLowHyst
AccumLowMin
Upper setting
“AccumUppHyst”
controller indicated H1 supply water temp
AccumLowMin
AccumLowHyst
Upper part setting
”AccumUppHyst”
controller indicated H1 supply water temp
El.HeatUppHyst
Upper part setting
AccumUppHyst
controller indicated H1 supply water temp
-
-
Function and its terms:
Relay 1
Relay 2
Geothermal heating unit's electrical
heating resistor control. When relay is
inactive, the electrical heating resistor is
switched on (strip connector 73-74 is
closed).
geothermal heating unit's
compressor control. When the relay is
active, the compressor is switched on (strip
connector71-72 is closed).
27
Measurement 1: Outdoor temperature
Measurement 2: H1 Supply water temperature
Measurement 4: Compressor's running information
Measurement 9: Accumulator upper part temperatur
Measurement 10: Accumulator lower part temperatur
Measurement 11: Hot gas temperature
AccumUpperMin
AccumUppHyst
ElHeatUppHyst
AccumLowerMin
AccumLowHyst
AccumUppComp
5... 80 °C
3... 10 °C
2... 10 °C
30... 55 °C
3... 10 °C
0... 10 °C
55 °C
6 °C
2 °C
45 °C
6 °C
5 °C
Minimum temperature of accumulator's upper part
Temperature control hysteresis of accumulator's upper part
Additional hysteresis for electrical heating resistor control
Minimum temperature of accumulator's lower part
Temperature control hysteresis of accumulator's lower part
Outdoor compensation of the accumulator's upper part when the outdoor
temperature drops to -20° C or below.
Settings:
Range:
Explantion:
Factory settings:
Compensation grows linearly so that it is 0 at an outdoor temp. of + 20° C and reaches the
“AccumUppComp” setting at an outdoor temp. of -20° C
Calculate according to the formula: “AccumUppMin” + Amount of outdoor compensation
The maximum limit varies from 53° C to 55° C:
- When the outdoor temperature is above +15°C, the maximum limit is 53° C.
- When the outdoor temperature is below -5° C, the maximum limit is 55 ° C.
- When the outdoor temperature is from +15° C to -5° C the temperature limit changes
linearly from 53° C to 55° C.
Calculated setting
Outdoor compensation:
Upper part setting:
Maximum limit for the lower part
compressor
electrical
heating
resistor
Actuator
Actuator
H2
H1
