Thermo King SB-200TG, Operation Manual

Page: 106 / 121

Glossary
105
defrost timer: A solid state module that initiates defrost at
selected intervals. Also establishes a maximum defrost
duration if normal circuits malfunction.
dehydrator: A device used to remove moisture from
refrigerant. Also called a drier.
discharge air temperature: The temperature of air leaving
the evaporator.
drier: See dehydrator.
ECT: A ceiling-mounted Thermo King remote evaporator. See
EW and TLE.
ERC: Extended Remote Unit Control. (Door switches) An
option on Thermo King multi-temperature units to improve
temperature control when doors are opened during delivery.
When a compartment door is opened, the refrigeration unit for
that compartment may be forced to NULL, defrost, or some
other mode. Opening a compartment door may also affect the
operating mode of other compartments. ERC systems are
connected in a variety of ways to meet customer needs.
ETV (Electronic Throttling Valve) : A device used with a
microprocessor to precisely control the refrigeration system.
evaporator: The part of the refrigeration system that absorbs
heat during the cooling cycle.
EW: A wall-mounted Thermo King remote evaporator. See
ECT and TLE.
F: See Fahrenheit.
Fahrenheit: A unit of temperature measurement used in the
United States. Abbreviated “F.”
freeze up: 1) Failure of a refrigeration system to operate
normally due to moisture in the refrigerant and the formation
of ice at the expansion valve. The expansion valve may be
frozen shut or open, causing improper unit operation in either
case. 2) The formation of a solid ice mass over the evaporator
coil reducing air flow.
fuse: An electrical safety device (typically a cartridge)
inserted into an electrical circuit. It contains material that will
melt or break when the current is increased beyond a specific
value. When this occurs, the circuit is opened and electrical
current flow is stopped.
Glossary
105
defrost timer: A solid state module that initiates defrost at
selected intervals. Also establishes a maximum defrost
duration if normal circuits malfunction.
dehydrator: A device used to remove moisture from
refrigerant. Also called a drier.
discharge air temperature: The temperature of air leaving
the evaporator.
drier: See dehydrator.
ECT: A ceiling-mounted Thermo King remote evaporator. See
EW and TLE.
ERC: Extended Remote Unit Control. (Door switches) An
option on Thermo King multi-temperature units to improve
temperature control when doors are opened during delivery.
When a compartment door is opened, the refrigeration unit for
that compartment may be forced to NULL, defrost, or some
other mode. Opening a compartment door may also affect the
operating mode of other compartments. ERC systems are
connected in a variety of ways to meet customer needs.
ETV (Electronic Throttling Valve) : A device used with a
microprocessor to precisely control the refrigeration system.
evaporator: The part of the refrigeration system that absorbs
heat during the cooling cycle.
EW: A wall-mounted Thermo King remote evaporator. See
ECT and TLE.
F: See Fahrenheit.
Fahrenheit: A unit of temperature measurement used in the
United States. Abbreviated “F.”
freeze up: 1) Failure of a refrigeration system to operate
normally due to moisture in the refrigerant and the formation
of ice at the expansion valve. The expansion valve may be
frozen shut or open, causing improper unit operation in either
case. 2) The formation of a solid ice mass over the evaporator
coil reducing air flow.
fuse: An electrical safety device (typically a cartridge)
inserted into an electrical circuit. It contains material that will
melt or break when the current is increased beyond a specific
value. When this occurs, the circuit is opened and electrical
current flow is stopped.