SMC Networks HRR Series, Manual

Page: 29 / 31

Be sure to read this before handling the products. Refer to the back cover for safety instructions.
For temperature control equipment precautions, refer to the “Handling Precautions for SMC
Products” and the “Operation Manual” on the SMC website: http://www.smc.eu
28
Maintenance
Caution
<Periodical inspection every one month>
1. Clean the ventilation hole.
If the dustproof filter becomes clogged with dust or debris, a
decline in cooling performance can result.
In order to avoid deforming or damaging the dustproof filter,
clean it with a long-haired brush or air gun.
<Periodical inspection every three months>
1. Inspect the circulating fl uid.
1) When using tap water
폷
Replacement of tap water
Failure to replace the tap water can lead to the develop-
ment of bacteria or algae. Replace it regularly depending
on your usage conditions.
2) When using ethylene glycol aqueous solution
Use a concentration meter to confi rm that the concentration
does not exceed 15 %.
Dilute or add as needed to adjust the concentration.
<Periodical inspection during the winter season>
1. Make water-removal arrangements beforehand.
If there is a risk of the circulating fluid freezing when the
product is stopped, release the circulating fl uid in advance.
2. Consult a professional.
For additional methods to prevent freezing (such as commer-
cially available tape heaters, etc.), consult a professional for
advice.
HRR
Series
Specifi c Product Precautions 5
Operation
Warning
1. Confi rmation before operation
1) The fl uid level of a tank should be within the specifi ed range
of “HIGH” and “LOW.”
When exceeding the specifi ed level, the circulating fl uid will
overfl ow.
2) Remove the air.
Conduct a trial operation, looking at the fl uid level.
Since the fl uid level will go down when the air is removed
from the user’s piping system, supply water once again
when the fl uid level is reduced. When there is no reduction
in the fl uid level, the job of removing the air is completed.
2. Confi rmation during operation
폷
Check the circulating fl uid temperature.
The operating temperature range of the circulating fluid is
between 10 and 35
°
C.
When the amount of heat generated from the user’s equip-
ment is greater than the product’s capability, the circulating
fl uid temperature may exceed this range. Use caution regard-
ing this matter.
3. Emergency stop method
폷
When an abnormality is confi rmed, stop the machine immedi-
ately. When operation is stopped by the RUN/STOP key, turn
off the power switch.
Operation Restart Time
Caution
1. Wait fi ve minutes or more before restarting operation
after it has been stopped. If the operation is restarted
within five minutes, the protection circuit may
activate and the operation may not start properly.
Protection Circuit
Caution
1. If operating in the conditions below, the protection
circuit will activate and an operation may not be
performed or will stop.
폷
Power supply voltage is not within the rated voltage range of
±
10 %.
폷
In case the water level inside the tank is reduced abnormally.
폷
Circulating fl uid temperature is too high.
폷
Compared to the cooling capacity, the heat generation
amount of the user’s equipment is too high.
폷
Ambient temperature is too high. (40
°
C or more)
폷
Refrigerant pressure is too high.
폷
Ventilation hole is clogged with dust or dirt.
왎
Refrigerant with GWP reference
Refrigerant
Global warming potential (GWP)
Regulation (EU) No 517/2014
(Based on the IPCC AR4)
Revised Fluorocarbons
Recovery and Destruction
Law (Japanese law)
R134a 1,430 1,430
R404A 3,922 3,920
R407C 1,774 1,770
R410A 2,088 2,090
∗
This product is hermetically sealed and contains fluorinated
greenhouse gases (HFC). When this product is sold on the market
in the EU after January 1, 2017, it needs to be compliant with the
quota system of the F-Gas Regulation in the EU.
∗
See specification table for refrigerant used in the product.