Valmet Valmet MCA, Инструкция по установке и эксплуатации, Страница: 50 / 66

11.6. TCU
NOTE: Before removing the antennas, check that the
process pipe is empty and unpressurized and that remov-
al is safe.
Removal:
1. Disconnect the network voltage form the TCU and
remove the network voltage lines from the TCU
terminal block.
2. Remove the sensor cable and the factory's system
cable from the TCU terminal block.
3. Remove TCU from its shield.
Installation:
1. Attach the new TCU to the shield.
2. Connect the sensor cable, network voltage cable
and the factory's system cable to the TCU terminal
block.
3. Switch on the network voltage.
NOTE: It may take a few minutes for text to appear on
the display. This is due to the charging of the device's
internal back-up battery.
4. If the program asks you to select calibration, select
– Sensor electronics calibration if you did not replace
sensor electronics.
– Default calibration if you replaced sensor electronics
as well.
Fig. 4. Installing Vortex Cooler.
11.7. Installing Vortex Cooler
Vortex Cooler is available as an option. Its code is
OUL00285 (Fig. 4).
Vortex Xooler is used to cool the sensor electronics
unit. Cooling is necessary if the electronics internal
temperature (Cab Temp) rises above 75 C (167 F) due
to the effects of its surroundings. Perform installation
as for FT and Fork sensors.
Vortex Cooler installation kit contains the following
parts:
1. Cooler with 6 hose coupling.
2.
Screws M6x25, 2 pieces.
3. Lock washers M6, 2 pieces.
4.
Thermal conductivity grease.
Installation:
1. Apply thermal conductivity grease to the installation
surface of the cooler's black casing.
2. Set the cooler on the base plate such that the
mounting holes are in line with each other.
3. Screw in the washers and screws and tighten them
with a 5mm Allen wrench.
4. Insert the air hose with internal diameter of 6 mm
(1/ 4") into the hose nipple using a hose clamp.
During installation, note the following:
The cooler is installed between elements. If lack of
available space so dictates, you can move the cooler
to one end of the element by removing the plug and
placing the cooler into that thread. Then put the plug
in the central thread. The cooler's outlet pipe can point
upwards (recommended) or to the side, but not down-
wards.
Cooling:
The maximum volume flow in cooling is 230 nl/min. If
you do not use a flow meter, start the air flow carefully
and then increase it slowly until the necessary cooling
efficiency is reached.
NOTE: The outlet pipe releases hot air. Check that there
are no cables that touch the outlet pipe or in its near vi-
cinity.
Installation & Owner’s manual OUL00298 V2.3 EN 50 Valmet Mircowave Consistency Transmitter