Full effect geothermal heating
There are two heating circuits (H1 and H2)
and one domestic hot water regulating
circuit (HW) in the203GT.
AccumUpperMin
AccumUpperHys
ElHeatUppHyst
AccumLowerMin
AccumLowerHys
A compressor running command is given (relay 2 is active, strip connector space 71-72 closes), when
or
+
or
The compressor stops running (relay 2 is inactive, strip connector space 71-72 opens), when
+
) and
+
and
+
Compressor running is inhibited (the compressor will not run)
The electrical heating resistor switches on if
1.
or
and
2.
or
The electrical heating resistor switches off (relay 1 is active, strip connector space 73-74 opens), when
and
The hour delay for electrical heating resistor start up is reactivated when measurement 4 receives running
information from the compressor
Electrical heating resistor control always stops
- the temperat. of the accumulator's upper part (meas. 9) drops below the [
(
/ 2)]
- the temperature of the accumulator's lower part (meas. 10) drops below [
5° C
]
- the temperature of the accumulator's lower part (meas. 10) drops below the
setting.
- the temperat. of the accumulator's upper part (meas. 9) rises above the [
(
]
- the temp. of the accumulator's lower part (meas. 10) rises above the [
5°C]
- the temperature of the controller's lower part (meas. 10) rises above the [“
”
] temperature.
-if less than 5 minutes has lapsed since the previous running period
-if the hot gas temperature measurement (meas. 11) is connected and the temperature of the hot gas rises above 120°C
(the compressor starts running when the temperature drops to 117° C).
-if the temp. of the accumulator's upper part (meas. 9) exceeds 95° C (the compressor starts running when the temperature
has dropped to 85° C)
-if the temperature of the accumulator's lower part exceeds the calculated “Lower part maximum limit” (53...55°C).
The compressor starts up when the temperature of the accumulator's lower part has dropped 3° C below the calculated
“Lower part maximum limit”)
-if the electrical heating resistor has been switched on
Compressor control has been on for an hour and the temperat. of the accumulator's lower part has not risen a degree
the compressor alarm is active and an attempt has been made to restart the compressor after a delay time of 5 minutes
The temperature of the compressor's upper part is below [
(
/ 2)
”
”]
the temp. of the accumulator's upper part (meas. 9) is below the [
] (This calculation takes into account that the temperature of the controller indicated H1 supply water
temperature is a maximum of 50° C.)
- the temperature of the accumulator's upper part (meas. 9) rises above the [”
”
(
/ 2)]
- the temperature of the controller's upper part is above the [
]
-if the temperature of measurement 9 rises above 95° C; the temp. must drop to 85° C before the electrical heating element
can start up
”AccumUpperMin”
“AccumUppHyst”
controller indicated H1 supply water temperature
“AccumLowHyst”
“AccumLowerMin”
”AccumUpperMin”
“AccumUppHyst” / 2
controller indicated H1 supply water temp
AccumLowMin
“AccumLowHyst”
“AccumUppMin”
“AccumUppHyst”
El.HeatUppHyst
controller indicated H1 supply water temp.
El.HeatUppHyst”
AccumUpperMin
“AccumUppHyst”
controller indicated H1 supply water temp
-
-
-
-
-
-
"
Function and its terms:
5... 55 °C
3... 10 °C
2... 10 °C
30... 55 °C
3... 10 °C
55 °C
6 °C
10 °C
45 °C
6 °C
Temperature control setting for the accumulator's upper part
Temperature control hysteresis for the accumulator's upper part
Additional hysteresis for electrical heating resistor control
Minimum temperature for the accumulator's lower part
Temperature control hysteresis for the accumulator's lower part
Settings:
Range:
Explantion:
Factory settings:
Relay 1
Relay 2
Geothermal heating unit's
electrical heating resistor control. When
relay is inactive, the
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).
electrical heating
resistor
25
Measurement 4: Compressor's running information
Measurement 1: Outdoor temperature
Measurement 2: H1 Supply water temperature
Measurement 9: Accumulator upper part temperatur
Measurement 10: Accumulator lower part temperatur
Measurement 11: Hot gas temperature
Calculated setting
Maximum limit for the lower part
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.
compressor
electrical
heating
resistor
Actuator
Actuator
H2
H1
