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5-12 l Maintenance
Checking the Refrigerant Charge and
Quality
WARNING: Refrigerant Hazard
Only certified refrigerant technicians should examine and correct problems
involving the refrigerant circuit.
All chillers are fully charged with R-134A refrigerant from Conair. Your chiller’s
model nameplate identifies the type and amount of total refrigerant charge required.
See Description section entitled, Specifications: EarthSmart ECM Series Chillers.
Check refrigerant charge while the chiller is running under normal load. Check the
refrigerant charge through the sight glass. Use a flashlight, if necessary, and check the
liquid-line sight glass:
• Under full load conditions, the refrigerant should be clear (no bubbles).
• Under low load conditions, when the Hot-Gas Bypass valve (HGBP) is
operating, bubbles may be visible in the sight glass. This is normal.
A refrigerant quality label is located within the sight glass. A green label is normal. A
yellow or dark brown label indicates that the refrigerant is contaminated and must be
replaced.
If the charge is low or contaminated and the chiller is under warranty, contact Conair
service; or have a local, certified refrigeration technician service the system.
Sight glass
CAUTION: Always disconnect and lock out the main power sources before making
electrical connections. Electrical connections should be made only by a qualified
electrical technician.
NOTE: In this diagram, the
chiller’s panels are removed
for clarity.
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