Technical data

Rittal Modular Safe LMS 9.3 Description of product
We reserve the right to make technical changes Version 2.2
Operator Manual Page 16
Outdoor solution
In the outdoor solution, the vaporiser section of the air conditioning unit is identical to the compact solution
positioned inside the modular safe.
The weatherproof condensator together with the compressor are yet designed for the outside installation.
Both circuits are connected together on site using coolant lines and the corresponding control cables.
If the distance between the modular safe and the outside unit is more than 20 m and the height difference
more than 5 m project planning will be needed.
The display of the comfort controller displays both the current temperature inside the safe and malfunction
warnings. It is located on the service door of the Modular Safe.
The outdoor solution has the advantage that the discharged heat is guided directly into the open meaning
that no additional room ventilation and air conditioning is necessary. The noise generated by the compressor
is also located on the outside.
The outdoor split air conditioner can be used for temperatures between -15 °C and +35 °C. If the limit values
are exceeded or fallen short of, we cannot guarantee that the air conditioner will function properly.
Outdoor solution with Inverter technology (5 to 8 kW)
A special cooling unit is used to cool the modular safe as required. Together with harmonised modular com-
ponents, this ensures an energy-efficient dissipation of heat.
The external unit (condenser) has been designed on the basis of inverter technology and for the R 410A
refrigerant. The inverter permits the regulation of the compressor speed as required. The amount of refriger-
ant is regulated via the electronic expansion valve.
Adapting to the demand for cooling allows energy savings of up to 40 %.
The internal unit (evaporator) permits the targeted flow of air into the inside of the modular safe.
The cold air is expelled in front of the 19-inch level, while the warm air is sucked in through the rear of the
devices. Further increases in efficiency and an avoidance of hot-spots result from using suitable air baffle
plates.
Power supply to the air-conditioning system
The power supply must be provided by the customer and must correspond to the connection values subse-
quently indicated.
In the compact air-conditioning system, the customer's supply cable is guided via the cable entry point into
the safe interior, guided to the vaporiser section and connected there. The outside device positioned on the
door is supplied via the inside section (vaporiser).
In the outdoor air-conditioning system, the customer's supply cable is guided to the outside device. The
inside device (vaporiser) is supplied with power by the outside device.
Selecting the cooling capacity
The cooling devices for the modular safe must be designed so that the cooling capacity corresponds ap-
proximately to the stray power in the safe.
If there is a deviation of >10–15 % (i. e. at “too little” output loss) the use of a power controller is recom-
mended as otherwise condensation water can build up in the safe. This additional package can be quoted
optionally.
The cooling system with inverter technology is used to cool the modular safe as required within the range of
five to 8 kW.
Air guidance in the safe
The suction and blowing openings in the air conditioner must not be covered by other equipment. Open ar-
eas in the front of the 19“ level have to be closed with dummy plates to avoid air short-circuiting.
Conditions at the area of installation
Installation areas with extreme conditions (aggressive media in the ambient air, high air humidity, etc....),
must be checked before an air-conditioned safe is installed.