section 8: operation
Page 34
8.1 Heat Pump operation
The heat pump control is based on:
1. Outgoing water temperature (measured by outgoing water
temperature sensor on heat pump)
2. Thermal store temperature
During heating operations, parameter 4100 is set to 1. The control
of the heat pump is based on the outgoing water temperature.
The operation by water temperature can be “outgoing water
temperature” or “thermal store temperature”. If parameter 5111 is
set to “enable” for thermal store temperature sensor. In this case
the operation will be based on thermal store temperature.
Set the parameter correctly for enable/disable of thermal store
(parameter 5111), the main water pump setting (parameter 4200).
Refer to Table 8-1.
table 8-1:
Parameters
Parameter 5111
thermal store
temperature
Parameter 4100
heat pump on/
off
Parameter 4200
main water
pump
Outgoing water
temperature
0=disable
1=Water set
point
0=always ON
2=detect cycle
Thermal store
temperature
1=enable
0=room set
point
0=always ON
1=thermal store
temperature
2=detect cycle
For further information, refer to Section 3.8 (volumiser tanks).
8.1.1 Heat Pump controlled based on outgoing Water
temperature
Based on the outgoing water temperature setting, the compressor is
controlled and turned ON/OFF.
start of operation
When the outgoing water temperature is below the water set point,
the heat pump is turned ON.
Heating : Outgoing water temp ≥ Water set point (parameter
2100~2105) – Hysteresis (parameter 2141)
compressor control
The compressor is controlled so that the Outgoing water
temperature can reach the water set point.
When the water setpoint temperature is reached, compressor
is stopped
With the minimum compressor frequency, if the Outgoing water
temperature is in the following conditions, or if the Outgoing water
temperature reaches the water set point to protect heat pump, then
compressor shall be turned OFF.
Heating : Outgoing water temp. ≥ Water set point (parameter
2100~2115) +1°C
Outgoing water temp. ≥ 60.5°C
table 8-2:
Parameters
level
Parameter
function description
Display and input value
remarks
Group
code
Default
Min.
max.
Unit
I
41 00
The heat pump turns ON/OFF based on
1=water set point
1
0
1
-
To be set to
the following
combinations
parameter 5111=0
→Parameter
4200=0 or 2
parameter 5111=1
→Parameter
4200=0 or 1 or 2
I
42 00
Type of configuration of main water pump
0=always ON
1=ON/OFF based on buffer tank temperature
2=ON/OFF based on detect cycles
0
0
2
-
I
51 11
Terminal 11-12: thermal store temperature probe
0=disable
1=enable
0
0
1
-
For details of how to access the parameter settings, refer to Section 9.3.
compressor off→on control
When the Outgoing water temperature reaches the set point and
after the compressor is turned OFF, or when the conditions below
are met, the compressor shall be turned ON.
However, the compressor is not turned ON during 3 minutes OFF-
ON waiting time.
8.1.2 Heat Pump controlled based on thermal store
temperature
In order to reach the thermal store set point, compressor frequency
shall be controlled so that outgoing water temperature can reach
the maximum temperature in Heating mode (60°C) And, the
compressor is turned ON/OFF based on thermal store set point also
being reached.
start of operation
When the Outgoing water temperature does not reach the water set
point, heat pump is turned ON.
compressor control
The compressor is controlled to reach the maximum flow
temperature in Heating mode (60°C).
When the water set point is reached, compressor is stopped
The compressor shall be turned OFF if the thermal store set point
is reached, or if the Outgoing water temperature is in the following
conditions, or the Outgoing water temperature reaches the set point
to protect heat pump.
Heating: thermal store temperature ≥ thermal store set point
(parameter 2161)
Outgoing water temp. ≥ Maximum Outgoing water set point (60°C)
+1°C
Outgoing water temp. ≥ 62.5°C
compressor off→on control
When the thermal store temperature reaches the set point, or when
the conditions below are met after the compressor is turned OFF
due to the set point protecting the heat pump, the compressor is
turned ON.
However, the compressor is not turned ON during 3 minutes OFF-
ON waiting time.
Heating: thermal store temp. ≤ thermal store set point (parameter
2161) – Hysteresis (Parameter 2141)
Outgoing water temp. ≤ Water set point (60°C) – Hysteresis
(parameter 2141)
Outgoing water temp. ≤ 57.5°C
8
operation
Summary of Contents for Aerona3 HPID12R32
Page 71: ...NOTES Notes Page 71...
