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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 5.3) and the unit will start up.
Phase Sequence Verification (only required on 3-Phase units): 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.
Increase the cold water setpoint up to the maximum allowed value (see point
4.1) to prevent the compressor from starting. Switch the main power switch
OFF and then back ON. Open the right panel, make sure the water inlet valve
is fully open and adjust the water outlet valve so that the pump works at the
nominal pressure indicated in the chiller’s data plate. You can see the pump
pressure on the “Info – Process circuit” screen from the Information screens
loop on the controller display (see point 5.3).
If the water tank temperature is above the programmed setpoint, the compressor will start roughly 2 minutes
after switching the main power switch ON. If this happens switch the main power switch OFF and perform
the operation again within 2 minutes. If the compressor works with the lateral panel open the chiller could trip
by high pressure alarm, see point 7.
After 5 minutes, or when the unit stops by low water level alarm, turn the main power switch OFF, open the
lateral panel and check the level in the tank. If the level is below the maximum refill the water tank until the
maximum level.
Repeat this operation until water level in the tank remains constant.
When refilling the tank respect the ethylene glycol concentration as per point 4.1.
Select the desired temperature of the cold water outlet (see point 5.3). The Ultracool units are delivered with
a pre-set temperature of 10ºC (50ºF).
Check the working pressure of the water pump, if it is higher than the nominal value indicated in the
characteristics plate and all manual valves in the circuit are fully open, then check that the water pipes meet
the requirements on point 3.5.
Please note that, under normal operation, the refrigerant compressor and some copper pipes can reach
temperatures above 100ºC (212ºF).
Be careful not to touch these elements shortly after turning Off the chiller; allow enough time for the
components inside to cool down before opening the access panels.
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