Lauda RP 3050 C Operating Instructions Manual Download

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Proline Kryomats

Unit description

YAUE0007 / 10/2/2018

Unit description

4.1

Environmental conditions

The operation of the thermostats is only allowed under the following conditions as specified in
DIN EN 61010-2-010:2003 and DIN EN 61010-1:2001:



Indoor use only.



Altitude up to 2000 m above sea level.



Foundation must be dense, even, non-slippery and non-flammable.



Keep clear distance (



6.1 Assembly and siting).



Ambient temperatures range (



11 Technical data).

Use only within this range for an undisturbed operation.



Mains supply voltage fluctuations (



11 Technical data).



Relative humidity (



11 Technical data).



Transient over voltage according to Installation Categories (Over voltage Categories) II.



Pollution degree: 2.

4.2

Types of unit

The type designation of the Proline Kryomats comprises the prefix R (to designate the refrigeration
machine), a P for Proline, the bath volume in liters and the lowest bath temperature (guide figure
without arithmetic sign).
The designation is supplemented with a "C" which indicates the presence of the Command remote
control.
For units with water-cooling, the type designation is supplemented with a "W".

Examples: RP 4090 CW is a low-temperature thermostat with 40-liter bath and -90 °C lowest
temperature. The unit has a Command remote control and is water-cooled.

4.3

Varioflex pump

All units are fitted with a Varioflex pump with a 4-stage variable drive (pump level 5 to 8). The pump
power can therefore be optimally matched to the relevant task. In order to achieve optimum
temperature homogeneity in the heat transfer liquid in the bath, it is recommended to select the pump
level in dependence of the viscosity of the heat transfer liquid; therefore at higher viscosity to increase
the pump level.
Be cautious at higher bath levels to avoid liquid to slop over the bath edge.
The user cannot set the pump levels 1 to 4, because there is no sufficient temperature homogeneity in
the bath vessel. With pump level 0 the unit goes into the standby mode. It should be noted that the
heat input of the pump into the bath increases with increasing pump level.

With the Varioflex pump, open containers can be operated at a constant level when a level controller
(accessory LCZ 0660) is used.

At the right-hand side and at the back of the unit outflow and inflow nozzles of the pump are fitted for
external loads. This means that up to two external loads can be directly connected without a
distributor. Pump connections, which are not required, must be closed off with the supplied caps and
union nuts.
A bypass valve can subdivide the total volume flow variably between the bath (internally) and the
connected load (externally). Attention: the external application must not block the volume flow. If no
load is connected to the pump connector, the bypass valve must be set to the

“internal” position for

the best bath circulation. All pump connections must be closed off with the supplied caps and union
nuts.