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HRX-OM-L014
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HRGC001-A HRGC002-A HRGC005-A
1
st
edition : Jun. 2007
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-4
7.2.4 Inspection every 6 months
Check for water leakage from pump
Remove the panel and check the mechanical seal of the pump for excessive
leakage. If the leakage is found, replace the mechanical seal. Order the
mechanical seal described in “7.3 Consumables” as a service part.
7.2.5 Inspection for winter seaon
Prevention of freezing of recirculating fluid
The unit can be prevented from freezing in the recirculating fluid during
winter season or at night.
If the freezing is concerned due to the change of setting up conditions and
operating environment (operating term and weather), conduct the following
operations in prior.
Anti-freezing function (automatic pump operating function)
(only for HRGC00
∗
∗
∗
∗
-A)
When the recirculating fluid temperature
reaches 3
o
C, the pump will start
automatically.
The operation of pump will heat the
recirculating fluid with its power.
Then, when the recirculating fluid
temperature reaches 5
o
C, the pump will
stop automatically.
As a result, the recirculating fuid
temperature is ketp between 3 and 5
o
C,
and can be prevented from freezing.
1.
Keep the power supply on. ([POWER] LED: ON, [RUN] LED: OFF).
2.
Fully open the valve and manual relief valve installed by user, and make the condition
where the recirculating fluid can circulate when the pump will start automatically.
Leakage from the mechanical seal
It is impossible to prevent the leakage from the mechanical seal completely
because of its structure. Although the leakage is described as 3cc/hr or less
(reference value) based on the JIS, consider the standard for leakage requiring
the replacement of the mechanical seal to be 0.3cc/hr or more.
The recommend life time of the mechanical seal before needing replacement is
6000 to 8000 hours (usually 1 year)
This function can not prevent freezing of the unit completely in the
installation area exposed to sever cold weather condition.
For that condition, consult with a specific vendor to install other
anti-freezing equipment (commercial tape heater, etc.).
Also, the facility water circuit does not have the similar function.