HRX-OM-M090
Chapter 5 Display and setting of various functions
5.10 Anti-freezing function HRS Series
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5.10 Anti-freezing function
5.10.1 Anti-freezing function
The product can prevent the circulating fluid from freezing during winter time.
If there is a possibility of the circulating fluid freezing due to changes in the
installation and operating environment (operating period and weather), set
the protection in advance.
z
If the circulating fluid temperature falls below 3℃, the pump will start
operating automatically.
z
The heat generated by the pump operation will warm up the circulating
fluid.
When the circulating fluid temperature reaches 5℃ or higher, the pump
will stop operating automatically.
z
As a result, the circulating fluid maintains a temperature of between 3℃
and 5℃, preventing freezing.
If the anti-freezing function is set, [RUN] lamp flashes for 2 sec. during
waiting (pump does not operate). The [RUN] lamp flashes at 0.3 sec.
intervals during the automatic operation of the pump. The default setting of
this function is “OFF”.
z This function starts in stand-by condition (power supply switch is
ON).
z 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.
z In extremely cold weather conditions, the heat generated by the
pump as described above may not be enough to prevent freezing.
z During the automatic operation, the pump does not stop even if you
press "RUN/STOP" key.
z In an emergency, stop operation by shutting off the power supply.
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