4.2 Safety devices
The pressures in the commotherm SW/WW heat pump should remain within a define range. To ensure this,
so-called pressure switches are built in. These serve on the one hand as a safety
hand to ensure that the heat pump works in the defined range. The pressure switches are designed as
chamber pressure switches, i.e. the set, adjusted pressures cannot be reset by unauthorised persons. The
pressure switches are also used as low or high pressure switches.
below.
4.2.1 Low pressure switch
The low pressure switch turns off the compressor at an operating pressure of < 1 bar and therefore protects
this at low pressure (low pressure may be ca
4.2.2 High pressure switch
High pressure switches also serve to switch off the compressor in an emergency. In contrast with low
pressure switches, however, this turns off the compressor at a higher pressure. In the ev
heat pump this occurs at pressures of > 42 bar.
4.3 Operation conditions to be maintained
Some important operating conditions are described below, which must be adhered to. In addition,
Table 4. 2 summarizes an overview of the operating conditions to be observed.
Table 4. 2Table 4.2 also gives a summary on avoiding faults, if these conditions are not adhered to.
4.3.1 Permissible temperatures
Flow temperature
The heat pump should be operated with a maximum flow temperature of 55° C. If a flow temperature of more
than 55° C is selected, the heat pump works inefficiently. In addition, the compressor is heavily loaded and
the system is constantly on failure.
In general, the flow temperature should actually be adapted to the actual operating temperatures and be set
as low as possible.
Temperature of the brine
The temperature of the brine shouldn't be lower than
the can freeze.
4.3.2 Flow rate
No flow rate for heating equipment
If there is no flow rate in the heating equipment, the system will be extremely overloaded until release of the
safety device, in this case the high pressure switch. The water flow
therefore be checked.
No flow rate for brine equipment
If there is no flow rate on the brine equipment, the system will be extremely loaded until release of the safety
device, in this case the low pressure switch. In additio
exchanger and subsequent escape of refrigerant can take place. In the worst case, the device is destroyed
and must be replaced! A remedy here, in turn, a control of the brine flow and the system pressur
check of the frost resistance (at least
No ground water flow (only for WW
If there is no flow rate on the brine equipment, the system will be extremely loaded until release of the safety
device, in this case the low pressure switch
exchanger is possible. Compensation is provided by a control of the warer flow rate, the system pressure
and the groundwater supply system, a cleaning of the filter and an annual maintenance of
pump.
In addition, Table 4. 2 summarizes an overview of the operating conditions to be observed.
Mode of operation
The pressures in the commotherm SW/WW heat pump should remain within a define range. To ensure this,
called pressure switches are built in. These serve on the one hand as a safety device, and on the other
hand to ensure that the heat pump works in the defined range. The pressure switches are designed as
chamber pressure switches, i.e. the set, adjusted pressures cannot be reset by unauthorised persons. The
o used as low or high pressure switches. These devices are briefly described
The low pressure switch turns off the compressor at an operating pressure of < 1 bar and therefore protects
this at low pressure (low pressure may be caused by a lack of refrigerant, for example).
High pressure switches also serve to switch off the compressor in an emergency. In contrast with low
pressure switches, however, this turns off the compressor at a higher pressure. In the ev
heat pump this occurs at pressures of > 42 bar.
Operation conditions to be maintained
Some important operating conditions are described below, which must be adhered to. In addition,
summarizes an overview of the operating conditions to be observed.
Table 4.2 also gives a summary on avoiding faults, if these conditions are not adhered to.
The heat pump should be operated with a maximum flow temperature of 55° C. If a flow temperature of more
than 55° C is selected, the heat pump works inefficiently. In addition, the compressor is heavily loaded and
In general, the flow temperature should actually be adapted to the actual operating temperatures and be set
The temperature of the brine shouldn't be lower than -6°C. If it is lower, the machine will work in
No flow rate for heating equipment
If there is no flow rate in the heating equipment, the system will be extremely overloaded until release of the
safety device, in this case the high pressure switch. The water flow rate and system pressure should
If there is no flow rate on the brine equipment, the system will be extremely loaded until release of the safety
device, in this case the low pressure switch. In addition, a freeze of the system and the device
exchanger and subsequent escape of refrigerant can take place. In the worst case, the device is destroyed
and must be replaced! A remedy here, in turn, a control of the brine flow and the system pressur
check of the frost resistance (at least -15°C).
No ground water flow (only for WW-devices)
If there is no flow rate on the brine equipment, the system will be extremely loaded until release of the safety
device, in this case the low pressure switch. In addition, a freezing of the system and the external heat
exchanger is possible. Compensation is provided by a control of the warer flow rate, the system pressure
and the groundwater supply system, a cleaning of the filter and an annual maintenance of
summarizes an overview of the operating conditions to be observed.
Mode of operation
4
13
The pressures in the commotherm SW/WW heat pump should remain within a define range. To ensure this,
device, and on the other
hand to ensure that the heat pump works in the defined range. The pressure switches are designed as
chamber pressure switches, i.e. the set, adjusted pressures cannot be reset by unauthorised persons. The
These devices are briefly described
The low pressure switch turns off the compressor at an operating pressure of < 1 bar and therefore protects
used by a lack of refrigerant, for example).
High pressure switches also serve to switch off the compressor in an emergency. In contrast with low
pressure switches, however, this turns off the compressor at a higher pressure. In the event of the SW/WW
Some important operating conditions are described below, which must be adhered to. In addition, In addition,
Table 4.2 also gives a summary on avoiding faults, if these conditions are not adhered to.
The heat pump should be operated with a maximum flow temperature of 55° C. If a flow temperature of more
than 55° C is selected, the heat pump works inefficiently. In addition, the compressor is heavily loaded and
In general, the flow temperature should actually be adapted to the actual operating temperatures and be set
6°C. If it is lower, the machine will work inefficient and
If there is no flow rate in the heating equipment, the system will be extremely overloaded until release of the
rate and system pressure should
If there is no flow rate on the brine equipment, the system will be extremely loaded until release of the safety
n, a freeze of the system and the device-inernal heat
exchanger and subsequent escape of refrigerant can take place. In the worst case, the device is destroyed
and must be replaced! A remedy here, in turn, a control of the brine flow and the system pressure and a
If there is no flow rate on the brine equipment, the system will be extremely loaded until release of the safety
. In addition, a freezing of the system and the external heat
exchanger is possible. Compensation is provided by a control of the warer flow rate, the system pressure
and the groundwater supply system, a cleaning of the filter and an annual maintenance of the submersible
summarizes an overview of the operating conditions to be observed.
Summary of Contents for commotherm 30 SW
Page 1: ...Operating instructions commotherm SW WW brine water water water heat pump ...
Page 76: ...10 Notes 76 10 NOTES ...
Page 77: ...Notes 10 77 ...
Page 78: ...10 Notes 78 ...
Page 79: ...Notes 10 79 ...
