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An evaporator assembly through which a refrigerant is circulated to transfer heat out of a volume of air in a housing in which the evaporator assembly is at least partially disposed. The evaporator assembly includes an evaporator in fluid communication with a compressor for compressing the refrigera

An evaporator assembly through which a refrigerant is circulated to transfer heat out of a volume of air in a housing in which the evaporator assembly is at least partially disposed. The evaporator assembly includes an evaporator in fluid communication with a compressor for compressing the refrigerant, a solenoid valve subassembly for controlling circulation of the refrigerant, a thermostat electrically connectable to the solenoid valve subassembly via a solenoid control circuit, one or more fans for circulating the air in the housing, and one or more fan motors for rotating the fans. Drive voltage supplied to the fan motors is controlled by a fan controller. The fan controller provides a first predetermined drive voltage to the motor drive when refrigerant is circulatable and a second predetermined drive voltage to the motor drive when refrigerant is non-circulatable.

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1. An evaporator assembly through which a refrigerant is circulated to transfer heat out of a volume of air in a housing in which the evaporator assembly is at least partially disposed, the evaporator assembly comprising: an evaporator in fluid communication with a compressor configured to compress

1. An evaporator assembly through which a refrigerant is circulated to transfer heat out of a volume of air in a housing in which the evaporator assembly is at least partially disposed, the evaporator assembly comprising: an evaporator in fluid communication with a compressor configured to compress the refrigerant;a solenoid valve subassembly configured to control circulation of the refrigerant, the solenoid valve subassembly being switchable between an open condition, in which the refrigerant is circulatable, and a closed condition, in which the refrigerant is substantially non-circulatable;a thermostat electrically connectable to the solenoid valve subassembly via a solenoid control circuit, the thermostat comprising a single pole double throw switch configured to complete the solenoid control circuit when the temperature of the air in the housing is above a cut-in temperature, and open the solenoid control circuit when the temperature of the air is below a cut-out temperature;the solenoid valve subassembly configured to be in the open condition when the solenoid control circuit is energized and in the closed condition when the solenoid control circuit is open;at least one fan configured to circulate the air in the housing;at least one electronically commutated fan motor configured to rotate said at least one fan, said at least one fan motor operable when a drive voltage is provided to a motor drive thereof across a first conductor and a second conductor connected thereto;said at least one fan motor comprising a fan controller configured to control the drive voltage, the fan controller being electrically connected with the first and second conductors;a fan control circuit comprising a third wire and the first conductor electrically connected with the fan controller;the thermostat configured to complete the fan control circuit when the solenoid control circuit is open, and open the fan control circuit when the solenoid control circuit is completed;the fan controller configured to detect a signal voltage present between the third wire and the first conductor when the fan control circuit is completed, and the fan controller configured to provide a first predetermined drive voltage to the motor drive when said signal voltage is detected;the fan controller configured to provide a second predetermined drive voltage to the motor drive upon a failure of the fan controller to detect the signal voltage, the second predetermined drive voltage being greater than the first predetermined drive voltage; andwherein the first determined drive voltage and the second predetermined drive voltage are each greater than zero such that the fan motor is configured to operate when the temperature of said air in the housing is both above the cut-in temperature when the solenoid valve subassembly is in the open condition in which the refrigerant is circulatable and below the cut-out temperature when the solenoid valve subassembly is in the closed condition in which the refrigerant is substantially non-circulatable. 2. A refrigeration system in which a refrigerant is circulatable to transfer heat out of a volume of air in a housing, the refrigeration system comprising: a compressor through which the refrigerant is circulatable, for compressing the refrigerant;an evaporator assembly through which the refrigerant is circulatable for heat transfer from the air in the housing to the refrigerant, the evaporator assembly comprising: an evaporator in fluid communication with the compressor;a solenoid valve subassembly configured to control circulation of the refrigerant, the solenoid valve subassembly being switchable between an open condition, in which the refrigerant is circulatable, and a closed condition, in which the refrigerant is substantially non-circulatable;a thermostat electrically connectable to the solenoid valve subassembly via a solenoid control circuit, the thermostat comprising a single pole double throw switch configured to complete the solenoid control circuit when the temperature of the air in the housing is above a predetermined cut-in temperature, and open the solenoid control circuit when the temperature of the air is below a predetermined cut-out temperature;the solenoid valve subassembly configured to be in the open condition when the solenoid control circuit is energized, and in the closed condition when the solenoid control circuit is open;at least one fan for circulating the air in the housing;at least one electronically commutated fan motor configured to rotate said at least one fan, said at least one fan motor being operable when a drive voltage is provided to a motor drive thereof across a first conductor and a second conductor;said at least one fan motor comprising a fan controller configured to control the drive voltage, the fan controller being electrically connected with the first and second conductors;a fan control circuit comprising a third wire and the first conductor electrically connected with the fan controller;the thermostat configured to complete the fan control circuit when the solenoid control circuit is open, and open the fan control circuit when the solenoid control circuit is completed;the fan controller configured to detect a signal voltage present between the third wire and the first conductor when the fan control circuit is completed, and the fan controller configured to provide a first predetermined drive voltage to the motor drive when said signal voltage is detected;the fan controller configured to provide a second predetermined drive voltage to the motor drive upon a failure of the fan controller to detect the signal voltage, the second predetermined drive voltage being greater than the first predetermined drive voltage; and wherein the first determined drive voltage and the second predetermined drive voltage are each greater than zero such that the fan motor is configured to operate when the temperature of said air in the housing is both above the cut-in temperature when the solenoid valve subassembly is in the open condition in which the refrigerant is circulatable and below the cut-out temperature when the solenoid valve subassembly is in the closed condition in which the refrigerant is substantially non-circulatable. 3. A kit of parts for modifying a refrigeration system to provide a modified evaporator assembly, a refrigerant circulated therethrough for transferring heat out of a volume of air in a housing, the refrigeration system comprising: a compressor for compressing the refrigerant;an evaporator assembly for heat transfer from the volume of air in the housing to the refrigerant;the evaporator assembly comprising: an evaporator in fluid communication with the compressor;a solenoid valve subassembly configured to control circulation of the refrigerant, the solenoid valve subassembly switchable between an open condition, in which the refrigerant is circulatable, and a closed condition, in which the refrigerant is substantially non-circulatable;at least one fan configured to circulate the air in the housing;at least one electronically commutated fan motor configured to rotate said at least one fan, said at least one fan motor operable when a drive voltage is provided to a motor drive thereof across a first conductor and a second conductor;at least one fan controller configured to control the drive voltage, said at least one fan controller electrically connected with the first and second conductors; the kit of parts comprising: a third wire electrically connectable with said at least one fan controller, the third wire and the first conductor comprising a fan control circuit of the evaporator assembly;a thermostat electrically connectable to the solenoid valve subassembly via a solenoid control circuit, the thermostat comprising a single pole double throw switch configured to complete the solenoid control circuit when the temperature of the air in the housing is above a cut-in temperature and open the solenoid control circuit when the temperature of the air is below a cut-out temperature;the solenoid valve subassembly configured to be in the open condition when the solenoid control circuit is energized and in the closed condition when the solenoid control circuit is open;the thermostat configured to complete the fan control circuit upon opening the solenoid control circuit and open the fan control circuit when the solenoid control circuit is completed;said at least one fan controller configured to detect a signal voltage present between the third wire and the first conductor when the fan control circuit is completed, and said at least one fan controller configured to provide a first predetermined drive voltage to the motor drive when said signal voltage is detected; said at least one fan controller configured to provide a second predetermined drive voltage to the motor drive upon a failure of the fan controller to detect the signal voltage; and wherein the first determined drive voltage and the second predetermined drive voltage are each greater than zero such that the fan motor is configured to operate when the temperature of said air in the housing is both above the cut-in temperature when the solenoid valve subassembly is in the open condition in which the refrigerant is circulatable and below the cut-out temperature when the solenoid valve subassembly is in the closed condition in which the refrigerant is substantially non-circulatable. 4. The evaporator assembly according to claim 1 in which the first predetermined drive voltage is selected to cause said at least one fan motor to rotate at a minimum speed to provide sufficient air circulation in the housing to maintain a substantially uniform air temperature inside the housing. 5. The refrigeration system according to claim 2 in which the first predetermined drive voltage is selected to cause said at least one fan motor to rotate at a minimum speed to provide sufficient air circulation in the housing to maintain a substantially uniform air temperature inside the housing. 6. The kit of parts according to claim 3 in which the first predetermined drive voltage is selected to cause said at least one fan motor to rotate at a minimum speed to provide sufficient air circulation in the housing to maintain a substantially uniform air temperature inside the housing. 7. The evaporator assembly according to claim 1 wherein the fan motor is configured to rotate at a first speed greater than zero when the solenoid valve subassembly is in the closed condition and at a second speed when the solenoid valve subassembly is in the open condition, the second speed set to be greater than said first speed. 8. The evaporator assembly according to claim 2 wherein the fan motor is configured to rotate at a first speed greater than zero when the solenoid valve subassembly is in the closed condition and at a second speed when the solenoid valve subassembly is in the open condition, the second speed set to be greater than said first speed. 9. The evaporator assembly according to claim 3 wherein the fan motor is configured to rotate at a first speed greater than zero when the solenoid valve subassembly is in the closed condition and at a second speed when the solenoid valve subassembly is in the open condition, the second speed set to be greater than said first speed.