Rittal Liquid Cooling Unit LCU CW 5
2 Safety instructions
EN
2 Safety instructions
The LCU CW produced by Rittal GmbH & Co. KG are
developed and produced by Rittal with due regard to all
safety precautions. Nevertheless, the unit still causes a
number of unavoidable dangers and risks. The safety in-
structions provide you with an overview of these dan-
gers and the necessary safety precautions.
In the interest of your safety and the safety of others,
please read these safety instructions carefully before as-
sembly and commissioning of the LCU CW.
Follow the user information found in these instructions
and on the unit carefully.
2.1 General safety instructions
Please observe the following general safety instructions.
Always wear the required personal protective equip-
ment when working on this device (see section2.9
"Personal protective equipment").
Please do not make any changes to the LCU CW that
are not described in these operating instructions or
other applicable assembly and operating instructions.
The LCU CW should only be combined and operated
with the prescribed Rittal system accessories.
Other than these general safety instructions, it is also
vital to observe the specific safety instructions when
carrying out the tasks described in the following chap-
ters.
– Danger of injury from electric shock if the unit is
opened while connected to the mains. The unit must
only be opened and repaired by trained specialists or
qualified individuals.
2.2 Safety instructions for transportation
– There is a risk of injury from falling loads. Do not stand
under suspended loads when transporting the unit
with a hoist trolley, a forklift, or a crane. Be sure to use
an appropriate means of transport.
– There is a risk of injury when cutting through the pre-
tensioned tightening straps. Wear personal protective
equipment (PPE)!
– There is a risk of injury due to the heavy weight of the
device. Please observe the maximum permissible
weight to be lifted by one person. Use suitable lifting
devices, if needed.
2.3 Safety instructions for assembly
– Have the devices installed by qualified specialists
trained by Rittal.
– Beware of injuries if the unit tips over. From a horizon-
tal position, the unit should always be set upright by
two people working together, with one person bracing
the unit to prevent it from slipping as it is lifted. Wear
personal protective equipment (PPE)!
– There is a risk of injury from the device tipping over.
While upright, the LCU CW is at risk of toppling over
until it installed and correctly secured inside the server
rack. The second person should hold the unit securely
in an upright position until this has been done.
– While inserting the unit into the server rack, there is a
danger of crushing between the outer edges of the
unit and the frame section of the rack. Wear personal
protective equipment (PPE)!
2.4 Safety instructions for installation
– There is a risk of crushing when the containment sys-
tem is inserted into the server enclosure. Wear per-
sonal protective equipment (PPE)!
– There is a risk of becoming trapped and cut when
screwing on and sealing the coolant lines. Wear per-
sonal protective equipment (PPE)!
– Following installation, ensure that the coolant lines do
not restrict the flow of air through the device.
– Work on electrical systems or equipment may only be
carried out by an electrician or by trained personnel
guided and supervised by an electrician. All work must
be carried out in accordance with electrical engineer-
ing regulations.
– Use only insulated tools. Wear personal protective
equipment (PPE)!
– The voltage values shown in the wiring plan or on the
rating plate must match the mains voltage.
– Incorrect assembly and installation may lead to the risk
of condensation forming in the device, which can lead
to an electrical short circuit or to leaks of liquid.
2.5 Safety instructions for operation
– Risk of malfunction or damage! Do not modify the unit!
Use only original spare parts!
– There may be an increased noise level when the LCP
is in operation, especially when the device is operated
directly on the display. Wear personal protective
equipment (PPE)!
– Proper and flawless unit operation can only be en-
sured when it is operated under the intended ambient
conditions. As far as possible, be sure that the ambi-
ent conditions for which the unit is designed are com-
plied with, e.g. temperature, humidity, air purity.
– The medium necessary for the control system, i.e.
cooling water, must be available throughout the entire
operating time.
– If leaks occur, there is the risk of injury caused by es-
caping refrigerant, in particular glycol. Wear personal
protective equipment, collect any escaped refrigerant
with suitable cloths or absorbent materials, and rectify
the leakage cause without delay.
– The leak sensor built into the unit is for functional leak
detection only and should not be used as part of a
safety chain system.
– Injury caused by fan impellors! Keep persons and ob-
jects away from the fan impellors! Do not remove cov-
ers until the power supply is disconnected and impel-
lors are not moving! Always use mechanical protection
when working! Shut down the respective fan during
