49
Installation
Wiring Work
■Electric wiring
1
．
The power capacity of the power cord to the product must meet the maximum operating current
specifications listed in the chart below. Always properly connect the
ground wire. (An earth cord is accessories for RKS250F1-S)
RKS400F1
Power source
（
V
・
Hz
）
Three phase, 200 50/60
Maximum operating current
（
A
）
3
Ground wire
（㎟）
2 or larger
2
．
The product should have its own earth leakage breaker installed which will
also serve as overload protection.
RKS250F1-S RKS400F1
Breaker capacity
（
A
）
10 5
Current sensitivity (mA)
30mA
3. Attach the power cord to terminals [L1], [L2], and [L3]
in the distribution box.
A power cord with a plug is for RKS250F1-S
(Pass the power cord through the power access hole
in the cabinet.)
4. Always properly ground this product.
Connect the ground wire to a proper earth/ground
point that has been installed by a qualified electrician.
Furthermore, the diameter of the grounding wire must
be at least 2 mm
2
.
An earth cord is accessories for RKS250F1-S
5. Ensure the source voltage is within ±10% of the specified voltage.
6. Three-phase power models, be sure to check that there are no reversed power phases.
If the product is started and there are reversed power phases,
“
”
will be shown on the display
panel. If such a case arises, always cut off the power and reverse 2 of the 3 lines of the power cord
on the primary side.
(RKS400F1)
In addition, never push the electromagnetic switch in order to force start the product, and never
reverse the secondary circuit wiring.
Doing so will damage the compressor by causing it to run in reverse.
IMPORTANT
● When powering up the product, be sure to follow the guidelines described under the
"Operation" section in the "Operating Manual" portion of this guide.
● Never operate the product when the water circuit is empty. Always fill the water tank and
confirm the water level before operating.
● Do not perform withstand voltage tests nor insulation resistance tests on this product. Doing
so can damage the product cooler controller.
Its own earth leakage
breaker installed which
will also serve as
overload protection.
Interchange the
L1 and L3
connections.
Power cord Power cord
Secondary
Side
Primary
Side
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