Lauda UC-140SP, Operation Manual, Page: 9 / 23

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3
Start-Up
3.3 Chiller start-up
When the ultracool unit is started for the first time, it is necessary to turn
ON the Main power switch (element 1 in the control panel, see point 4)
and wait
six
hour
s
before continuing with the start-up sequence. This
time is necessary for the crankcase of the compressor to heat it up.
The oil in the crankcase of the compressor remains warm whenever the
main power switch is in the ON position and the unit is connected to the
line voltage. For this reason stop the ultracool unit by using the off-
switch, leaving the Main power switch in the ON position.
Fill the tank
with water of the required quality (see annex 9) or with
refrifluid through the provided connection until the maximum level of the
tank is reached.
Start the ultracool unit with the On/Off switch (element 2 in the control
panel, see point 4). Stop the ultracool unit and refill the tank to the
correct water level.
Repeat this procedure until the water level in the tank remains constant.
It’s necessary to verify the direction of rotation of the pump at the
initial start up.
To do so, start and stop the ultracool unit, using the
On/Off switch (it is easier to see the turn direction when the pump is
stopping). In the case of the pump rotating in the opposite direction from
the indicated, it will be necessary to exchange two phases in the main
power supply. It will not be necessary to check the turn direction of the
fans, because they are delivered in phase with the pump. Since it may
be difficult to see the pump’s rotation direction, verify that you did this
operation correctly when the motor fan starts working: The air should
enter the condenser and go out through the top of the chiller. If the air is
moving in the opposite direction then exchange two phases in the main
power supply.
Connect the On/Off switch so that the ultracool unit starts. At the same
time the digital thermometer and all the indicators that should light up will
turn on too, according to their function.
On the control thermostat select the desired temperature of the cold
water outlet (see point 4.2.1). The ultracool units are delivered with a
pre-set temperature of 10ºC (50ºF).
Adjust the water pressure, using an external valve at the ultracool outlet,
to the value indicated on the data plate (Nominal pressure).
UC-140
IND
IGO
50
/60Hz
30
.0
4
.0
3 re
v.
1