Technical information

CHECKING THE
REFRIGERANT
CHARGE
Portable Chillers UGH024/1103
5-10 MAINTENANCE
Check refrigerant charge while the chiller is running. Check
the refrigerant charge through the sight glass. Use a flashlight,
if necessary, and check the liquid-line sight glass:
l Under full load conditions, the refrigerant should
be clear (no bubbles).
l 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 and the Chiller is under warranty, contact
Conair service; or have a local, certified refrigeration techni-
cian add refrigerant to the system.
Sight
glass
All chillers are fully charged with refrigerant at the factory.
Your chiller’s model nameplate identifies the type and amount
of total refrigerant charge required.
WARNING: Refrigerant hazard
Only certified refrigerant technicians should
examine and correct problems involving the
refrigerant circuit.
WARNING: Hazardous substance
When burned, Freon R22 refrigerant forms
Phosgene gas. If the chiller is placed in the
vicinity of equipment with combustible systems,
the combustion air intake must be ducted in
from the outside and sealed in such a manner
as to prevent any refrigerant from entering the
combustion chamber. Refer to the Material
Safety Data Sheet for Freon R22 included in the
Appendix. This sheet explains the potential haz-
ards and how to avoid them.