12
(see annex 9.1), the suitable glycol concentration and the Refrifluid B additive
according to
point 3.1
of this
manual. Fill it directly to the tank until the maximum level of the tank is reached. On UC 50 and UC 65
models, lift the level switch manually to make sure it resets itself: when it resets you will hear its contact
“click”.
While filling the tank, make sure no water splashes onto any electrical components. Keep the cover of the
electrical box closed during the filling procedure.
Prime the pump in order to release any air inside:
Remove the priming plug (P, see diagram below).
Keep the priming plug open until only liquid runs out the priming plug.
Replace the priming plug and tighten securely.
Do not start the Ultracool unit until the pump has been properly vented.
Open the water inlet valve completely and close the outlet water valve completely as shown on the following
pictures:
Make sure that the external fuses are installed, see point 2.6.
Switch OFF the main power switch during any electrical intervention.
Connect the Remote ON/OFF control in terminals 23 and 24. If you do not use a remote control, connect
the wire-bridge supplied inside the electrical box to link terminals 23 and 24.
Close both access panels. Switch ON the general switch and, if remote On/Off is used, give a remote On
signal. Finally switch the chiller On from the controller display (see point 4.2) and
the unit will start up
.
Check that the working pressure of the pump is higher than the nominal pressure indicated on the
characteristics plate. If it is below this value, the pump is turning in the wrong direction. If this happens
switch
OFF the main power switch, disconnect the chiller from the power supply
and exchange two phases in the
main power supply.