Lampoassa 203GT, User Manual

Page: 28 / 44

Limited effect geothermal heating
Alarms:
Measurement 4
Measurement 9
: If the controller has given the compressor a running permit but measurements does not receive running
information, a ”CompressorRun” deviation alarm is given and the controller deletes the compressor's running permit. The compressor
tries to restart after 5 minutes and after that at 60 minute intervals if the electrical heating resistor is not on. If the compressor starts
up, it has to remain running for at least 2 minutes so the compressor alarm is deleted. An alarm can be caused by:
- the overcurrent protection of the overpressure pressostat, compressor or geothermal heating pump (acknowledged by the
electricity distribution cabinets) or
- the low pressure pressostate ( acknowledged by the pressostat).
: the temp of the accumulator's upper part exceeds 95°C, an “Overheat” alarm is given; (the alarm disappears when
the temperature drops below 85°C)
28
Geothermal heating unit control using factory settings. The outdoor temperature at the time of inspection is +20° C
and the controller indicated supply water temperature is 21° C.
Measurement 9 gives the compressor a running command because the temperature of meas. 9 is below
the [Upper part setting (” "/ 2)
The compressor stops running, because the temperature of meas. 9 is above the [“ ( ”/2)] setting
the temperature of measurement 10 is above the [ 5] above [ ” “ ”]
-
+
+ +
AccumUppHyst
Upper part setting" “AccumUppHyst
controller indicated H1 supply water temp “AccumLowMin AccumLowHyst
and
and
*2)
*4)
*1)
An example of automatic control:
Measurement 10 gives the compressor a running command because the temperature of measurement 10 is below “ ”
The electrical heating resistor switch on because the temperature of measurement 9 is below
the [
( ” / 2) “ ” temperature
The electrical heating resistor switches off because the temperature of measurement 9 is above the [ (“AccumUppHyst "/ 2)]
setting above the [ 5] setting
AccumLowMin
Upper part setting “AccumUppHyst El.HeatUppHyst
Upper part setting
controller indicated H1 supply water temp
-
-
-
+
and
*5)
*3)
Note! With partial effect geothermal heating the electrical heating resistor can be switched on when
the compressor is running
*4)
*1
)
Uppper part setting at outdoor temp. +20°C
Upper part setting - (”AccumUppHyst”/2)
The controller indicated temp. of H1
supply water
+ 5 - “AccumLowHyst”
“AccumLowerMin”
The controller indicated temp. of H1
supply water + 5
*2)
Upper part s (”AccumUppHyst”/2)
The controller indicated temp.
of H1 supply water
20
45
50
55
60
58
52
26
21
*3)
*5)
*2)
-
-
-
-
-
-
-
-
-
-
°C
Time
M
itt
au
s
9
M
itt
a
u
s
1
0
19
GeothHeatPart
AccumUpperMin55
AccumUppHyst
6
ElHeatUppHyst 2
AccumLowerMin45
AccumLowHyst
6
AccumUppComp 5
53
Max. limit of the accumulator's lower part
51
Electrical heating resistor
is switched on
Compressor is switched on
Compressor
is switched on
The controller indicated temp. of H1
supply water
- “ElHeatUppHyst”
“AccumLowerMin” + “AccumLowHyst”
Upper part setting - (”AccumUppHyst”/2) -
“ElHeatUppHyst”