Proline Edition X heating thermostats
18
Device description
YACE0099 / 10/9/2018
At the right-hand side and at the back of the unit outflow and inflow nozzles are fitted for external
loads. This means that up to two external loads can be directly connected without a distributor. Con-
nections 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). Consequently, no "pump short circuit" is needed. If no load is connected
to the pump connector, the bypass valve must be set to the
“internal” position for the best bath circula-
tion.
In the heating range the Varioflex pump operates up to viscosity values of 150 mm²/s. In the closed-
loop control mode 50 mm²/s should not be exceeded. The temperature control is the best with
30 mm²/s and lower viscosity.
With small bath thermostats (e.g. P 8) power level 3 to 6 is practicable.
For operation as a circulating thermostat with an external load, a higher power level is practicable to
maintain the temperature difference low, among other things also with higher temperatures in con-
junction with oils as heat transfer liquids.
The pump connections on the unit are fitted with M16 x 1 threads.
Pump characteristics
(
Section 11).
The pump outflows of the Varioflex pump can be closed off without any impairment to the pump. Here,
the "internal" setting of the bypass controller is recommended.
4.4
Materials
All parts being exposed to with the heat transfer liquid are made of high quality material appropriate to
the operating temperature. Non-rusting stainless steel and high quality temperature-resistant, primarily
solvent-resistant plastics are used.
4.5
Temperature display, control and safety circuit
In the Master Version, the units are equipped with a 5-character green LED display, which is used for the
display of the measurements and settings, as well as the operating status. The entry of setpoints and
other settings occurs under menu guidance via four keys.
The extra features of the Command Version include a removable console with a backlit graphical dis-
play. The entry of the setpoint and other settings occurs under menu guidance via situation-dependent
cursor keys and soft keys.
A Pt100 temperature probe acquires the outflow temperature in the bath. A high-resolution A/D converter
processes the measurement. Further measurement conditioning occurs using a special control algorithm
for controlling the heater actuator, which has a low reactive effect on the mains.
An external Pt100 can be connected via a socket (10S) for the acquisition of an external temperature.
This value can be displayed and, if required, used as the controlled variable with external control (Mas-
ter) switched on. In this way the system controls the external measurement and not the outflow tempera-
ture (
The safety system conforms to DIN EN 61010-2-010. The SelfCheck Assistant monitors about 50 unit
parameters, A dual-channel system is used in which two microcontrollers monitor one another. Along
with the bath temperature measurement and control probes, there are also two safety temperature
probes (Pt100) for the safety circuit for the overtemperature cut-off and for monitoring the bath tempera-
ture probe.
The overtemperature cut-off point is displayed on pressing the key
on the Master.
Changing the overtemperature cut-off point: (
7.2) (Switching on) on page 28.
Summary of Contents for PROLINE Edition X P 12 C
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