5
To Maintain Efficient and Trouble-Free Performance
3. Note the operating ranges and always operate the product within these ranges. Operating outside the
specified ranges can damage the product.
RKS250F1-S RKS400F1
Working water temp. range （℃） 5 ~ 25
Ambient temp. range（℃） 5 ~ 40
Power suppry voltage （V・Hz）
Single-phase 100
±
10
％・
50 / 60 Three-phase 200
±
10
％・
50 / 60
Circuration punp flow-rate
（L/min） At least 15
Maximum circulation pump working
pressure <50／60Hz>
(MPa) 0.02 / 0.03 or below
Water tank capacity （L） At least 10 At least 20
IMPORTANT
● Never operate the product when the pump is dry. Always fill the water tank and check the
water level before operating. Failure to add water and running the product dry can result in
pump breakdown.
4．Frequently turning on and off the product can damage it. After stopping the product, wait at least 3
minutes before starting again. Starting the product within 3 minutes after stopping will cause built-in
safety functions to activate and can cause damage to the compressor.
5．Confirm there is no dirt on the water piping and foot valve.
6．Always keep the water clean, inspect the water circuits monthly, and replace the water when
necessary.
(See "Water Circuit Inspection" on page 26 for details.)
7．Clean the condenser filter monthly.
（Refer to Page 25, “Cleaning The Condenser Filter”.）
WARNING
● Cut off power to the product before cleaning, servicing, or inspections. Failure to do so can
lead to electric shock or other injury from the fan.
8．Operate the product in an ambient temperature of 5 ~ 40℃.
Operating at temperature below 5℃will damage the compressor. Also, operating at above 40℃ will
result in a drop in heat transfer of the condenser, and may cause built-in safety devices to activate,
and stopping of product operation.
If the ambient temperature could rise above 40℃, install ducting to bring outside air to the intake on
the cabinet, or ducting to release hot outlet air outside the room. Please consult with a qualified
professional if such work is to be carried out.
9．Please Consult with your dealer if the product stops due to activation of an internal safety device.
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