What should be done to reduce refrigerant loss from a purge unit on a R-
123 chiller?
Repair the leak in the system
To raise the pressure of a low-pressure refrigeration system for leak
checking, you can
Heat the system by circulating hot water, raising the temperature of the
room, or using heating blankets
Low-pressure systems must be evacuated to
25 mm of Hg absolute before being discarded.
Purge units are required on low-pressure chillers because?
these systems operate below atmospheric pressure.
What is the safety classification of R-123
B1
hydrostatic tube test kit is used to?
find leaks in the tube.
What is a valid reason to request an extension from the EPA on the
appliance leak repair deadline?
Local permit regulation make the repair within 30 days impossible AND
more time is needed to obtain the necessary repair parts from the
manufacturer.
, For low pressure chiller, it is best to begin refrigerant recovery with
______ removal to avoid freezing of the water in the chiller barrels
liquid.
Every recovery and recycling unit must be _____________.
labeled as certified to meet EPA's requirements
The best method to determine a chiller's normal charge for leak rate
calculations is to
use the charge stated on the equipment nameplate.
What safety precautions should be adhered to for low-pressure systems?
Use gloves and safety goggles when working with liquid refrigerant.
If possible, the temperature of the equipment room where the chiller is
located ______.
Should be increased to speed recovery
To prevent freezing, when recharging an evacuated water-cooled chiller
system with R-123, first charge with vapor to a pressure of at least
_______________.
20 in Hg vacuum
When evacuating a system and the freezing of moisture in the system is
preventing you from achieving a deep vacuum, it may be necessary to
prevent freezing by
increasing the system pressure with nitrogen
123 chiller?
Repair the leak in the system
To raise the pressure of a low-pressure refrigeration system for leak
checking, you can
Heat the system by circulating hot water, raising the temperature of the
room, or using heating blankets
Low-pressure systems must be evacuated to
25 mm of Hg absolute before being discarded.
Purge units are required on low-pressure chillers because?
these systems operate below atmospheric pressure.
What is the safety classification of R-123
B1
hydrostatic tube test kit is used to?
find leaks in the tube.
What is a valid reason to request an extension from the EPA on the
appliance leak repair deadline?
Local permit regulation make the repair within 30 days impossible AND
more time is needed to obtain the necessary repair parts from the
manufacturer.
, For low pressure chiller, it is best to begin refrigerant recovery with
______ removal to avoid freezing of the water in the chiller barrels
liquid.
Every recovery and recycling unit must be _____________.
labeled as certified to meet EPA's requirements
The best method to determine a chiller's normal charge for leak rate
calculations is to
use the charge stated on the equipment nameplate.
What safety precautions should be adhered to for low-pressure systems?
Use gloves and safety goggles when working with liquid refrigerant.
If possible, the temperature of the equipment room where the chiller is
located ______.
Should be increased to speed recovery
To prevent freezing, when recharging an evacuated water-cooled chiller
system with R-123, first charge with vapor to a pressure of at least
_______________.
20 in Hg vacuum
When evacuating a system and the freezing of moisture in the system is
preventing you from achieving a deep vacuum, it may be necessary to
prevent freezing by
increasing the system pressure with nitrogen
