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Proline Kryomats
4
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 (
Ambient temperatures range (
Use only within this range for an undisturbed operation.
Mains supply voltage fluctuations (
Relative humidity (
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.
