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microKool Portable Chillers UGH004/0999
5-6 MAINTENANCE
All chillers are fully charged with refrigerant at the factory.
Your chiller mode’s nameplate identifies the type and amount
of total refrigerant charge required.
While the unit is running, check the refriger-
ant charge through the sight glass
located
between the evaporator and the condenser. Use a flash-
light to look at the liquid-line sight glass.
◆ Under full-load conditions, the sight glass should be
clear.
◆ Under low-load conditions, when the hot-gas bypass
valves are operating, bubbles may be visible in the
sight glass. This is normal.
If the charge is low, recharge the system.
Contact a certified refrigerant technician to recharge or
replace refrigerant. This procedure should be performed
only be a qualified technician.
CHECKING
REFRIGERANT
CHARGE
1
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