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10 Cards in this Set
- Front
- Back
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How can ice be removed from a sight glass?
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Cleaned with an alcohol spray.
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How high should you pressurize an idle low pressure chiller to prevent air accumulation?
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Slightly above atmospheric pressure.
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What effect does air in a chiller have on head pressure?
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Raises head pressure.
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What system failures require taking and oil sample?
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A leak or major component failure (compressor burnout).
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Why must water be circulated through a chiller during refrigerant recovery?
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To prevent freeze-up of the water as pressure is reduced on the refrigerant.
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What is the lowest access valve on a low pressure chiller?
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The evaporator charging valve.
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Where is a centrifugal chiller's rupture disk attached?
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At the evaporator.
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What is the typical pressure setting for a low pressure chiller's rupture disk?
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15 PSIG.
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Where is the outlet of a rupture disk discharged?
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Outdoor for venting.
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How is a chiller typically charged?
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Liquid through the evaporator charging valve.
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