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: https://www.smcworld.com
HRLE
Series
Specific Product Precautions 4
Facility Water Supply
Warning
2. When using tap water as facility water, use tap water that
conforms to the appropriate water quality standards.
Use tap water that conforms to the standards shown below.
If the water quality standards are not met, clogging or leakage
in the facility water piping, or other problems such as refriger-
ant leakage, etc., may result.
Tap Water (as Facility Water) Quality Standards
The Japan Refrigeration and Air Conditioning Industry Association
JRA GL-02-1994 “Cooling water system – Circulation type – Make-up water”
Item
Unit
Standard value
Influence
Corrosion Scale generation
Standard item
pH (at 25
°
C)
—
6.5 to 8.2
v
v
Electric conductivity (25
°
C) [
μ
S/cm]
100
*
1
to 800
*
1
v
v
Chloride ion (Cl
–
)
[mg/L]
200 or less
v
Sulfuric acid ion (SO
4
2–
)
[mg/L]
200 or less
v
Acid consumption amount (at pH4.8) [mg/L]
100 or less
v
Total hardness
[mg/L]
200 or less
v
Calcium hardness (CaCO
3
) [mg/L]
150 or less
v
Ionic state silica (SiO
2
)
[mg/L]
50 or less
v
Ref
erence item
Iron (Fe)
[mg/L]
1.0 or less
v
v
Copper (Cu)
[mg/L]
0.3 or less
v
Sulfide ion (S
2
–
)
[mg/L] Should not be detected
v
Ammonium ion (NH
4
+
)
[mg/L]
1.0 or less
v
Residual chlorine (Cl)
[mg/L]
0.3 or less
v
Free carbon (CO
2
)
[mg/L]
4.0 or less
v
*
1 In the case of [M
Ω
·cm], it will be 0.001 to 0.01.
•
v
: Factors that have an effect on corrosion or scale generation
• Even if the water quality standards are met, complete prevention of corrosion
is not guaranteed.
3. Set the supply pressure between 0.3 to 0.5 MPa. Ensure
a pressure difference at the facility water inlet/outlet of
0.3 MPa or more.
If the supply pressure is high, it will cause water leakage. If the
supply pressure and pressure difference at the facility water in-
let/outlet is low, it will cause an insufficient flow rate of the facil-
ity water, and poor temperature control.
Operation
Warning
1. Confirmation before operation
1. The fluid level of a tank should be within the specified range
of H (High) and L (Low). When exceeding the specified level,
the circulating fluid will overflow.
2. Remove the air.
Conduct a trial operation, looking at the fluid level.
Since the fluid level will go down when the air is removed
from the customer’s piping system, supply water once again
when the fluid level is reduced. When there is no reduction
in the fluid level, the job of removing the air is completed.
2. Confirmation during operation
Check the circulating fluid temperature.
The operating temperature ranges of the circulating fluid are
as follows: 15 to 25
°
C for CH1, and CH1 + 0 to 15
°
C for CH2
When the amount of heat generated from the customer equipment
is greater than the product’s capability, the circulating fluid temper-
ature may exceed these ranges. Use caution regarding this matter.
3. Emergency stop method
When an abnormality is confirmed, stop the machine immedi-
ately. After stopping operation, disconnect the power supply
from the customer equipment.
Operation Restart Time / Operation and Suspension Frequency
Caution
1. Wait five minutes or more before restarting operation
after it has been stopped. If the operation is restarted
within five minutes, the protection circuit may acti-
vate and the operation may not start properly.
2. Operation and suspension frequency should not ex-
ceed 10 times per day. Frequently switching be-
tween operation and suspension may result in the
malfunction of the refrigeration circuit.
Protection Circuit
Caution
If operating in the conditions below, the protection cir-
cuit will activate and an operation may not be per-
formed or will stop.
Power supply voltage is not within the rated voltage range of
±
10%.
In case the water level inside the tank is reduced abnormally
Circulating fluid temperature is too high.
Compared to the cooling capacity, the heat generation amount
of the customer equipment is too high.
Ambient temperature is too high. (Check the ambient tempera-
ture in the specifications.)
Ventilation grille is clogged with dust or dirt.
Maintenance
Caution
<Periodical inspection every one month>
Clean the ventilation grille.
If the dustproof filter of air-cooled type product 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>
Inspect the circulating fluid.
1. When using tap water or deionized (pure) water
Replacement of circulating fluid
Failure to replace the circulating fluid can lead to the develop-
ment of bacteria or algae. Replace it regularly depending on
your usage conditions.
Tank cleaning (same as the HRS series)
Consider whether dirt, slime or foreign matter may be present
in the circulating fluid inside the tank, and carry out regular
cleanings of the tank.
2. When using ethylene glycol aqueous solution
Use a concentration meter to confirm 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 and facility water freez-
ing when the product is stopped, release the circulating fluid
and facility water in advance.
2. Consult a professional.
This product has an “anti-freezing function.” Read the Opera-
tion Manual carefully, and if any additional anti-freezing func-
tion (e.g. tape heater) is needed, ask for it from the vendor.
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