Service manual

(The parts listed below are not part of the sealed refrigeration system and are available separately.
For part numbers, see the refrigeration assembly in the common parts section of the manual.)
CONDENSER FAN ASSEMBLY
The condenser fan pulls cool air from outside the vendor, through the condenser, over the
compressor and blows it out the back of the vendor. This cool air removes excess heat from
refrigerant in the condenser. The condenser fan runs when the compressor is engaged. The fan
assembly is mounted on the refrigeration base between the condenser and compressor.
EVAPORATOR FAN ASSEMBLY
The Evaporator fan pulls air from the front of the refrigerated space, through the evaporator, up the
rear of the refrigerated space into the vend stack. The fan blows air through the evaporator (which
removes the heat from the air). It circulates the cool air over the product, removing excess heat
from the product. The evaporator fan assembly is mounted to a fan bracket, mounted to the
extensions of the evaporator. These parts are located in the refrigerated area of the cabinet.
TEMPERATURE CONTROL
The temperature control regulates the temperature inside the refrigerated space of the vendor. The
control is adjustable. The temperature control consist of two main parts: the temperature control
box and the thermostat feeler bulb. The control box is mounted to the side of the evaporator. The
bulb is mounted on the evaporator fan bracket, in the air flow of fan. The bulb is a very narrow tube
with a refrigerant liquid inside. Small tubing connects the bulb to the control box. As liquid in the
feeler bulb warms, it expands into the tubing and then into the control box, pressing against a
bellows. The bellows closes a switch in temperature control, activating the compressor and the
condenser fan. As the liquid in the feeler bulb cools it contracts and releases the pressure against
the bellows, opening the switch, deactivating the compressor and the condenser fan.
START CAPACITOR - (WHEN USED)
The start capacitor is used on start up of the refrigeration system to phase out excess power to and
from the refrigeration system.
STARTING RELAY
The starting relay is mounted in the terminal box on the side of the compressor housing. When the
compressor first starts up, the starting relay closes and completes a starting circuit. When the
compressor motor reaches operating speed, the starting relay opens and breaks the starting circuit.
THERMAL OVERLOAD SWITCH
The thermal overload switch is mounted in the terminal box on the side of the compressor housing.
If the compressor motor gets hot or draws too much current, the thermal overload opens and breaks
the starting and running circuit of the motor. As the motor cools, the thermal overload closes,
allowing the compressor to run.
S-17