HRX-OM-R026
Chapter 5 Display and setting of various functions
HRSH Series
5.11
Anti-freezing function
5-29
5.11 Anti-freezing function
5.11.1 Anti-freezing function
To prevent the circulating fluid freezing during winter, this function operates
pump automatically to heat the circulating fluid by the pump
’s heat radiation
while the product
’s operation is stopping. If there is a possibility of the
circulating fluid freezing due to changes in the installation and operating
environment (season and weather), set this function in advance.
If the circulating fluid temperature falls below 3
o
C
, the pump will
start operating automatically.
The heat generated by the pump operation will warm up the
circulating fluid.
When the circulating fluid temperature reaches 5
o
C
or higher, the
pump will stop operating automatically.
As a result, the circulating fluid maintains a temperature of between
3
o
C
and 5
o
C
, preventing freezing.
When the anti-freezing function is set, [RUN] lamp blinks every 2 sec. during
waiting (pump does not operate). The [RUN] lamp blinks every 0.3sec.
during the automatic operation of the pump. The default setting of this
function is “OFF”.
When the warming up function is
“ON” (refer to “5.18Warming up function”),
the warming up function will be prioritized higher than the anti-freezing
function and anti-freezing function does not start.
This function can be used only while the power supply is ON and
the operation is stopping.
Fully open the valve or manual bypass valve arranged by the
customer so that the circulating fluid can circulate when the pump
starts automatic operation.
In extremely cold weather conditions, the heat generated by the
pump as described above may not be enough to prevent freezing.
During the automatic operation, the pump does not stop even if you
press "RUN/STOP" key. To stop the pump, shut off the power or
make this function
“OFF”.
The power supply should be ON for this function. Otherwise this
function cannot start.
