Wolf Sub-Zero ICB400 Series Service Manual page 57

Sealed System Information
WINE STORAGE SEALED SYSTEM
The following six diagrams illustrate a basic wine stor-
age sealed system. The components are listed in order
of refrigerant flow, with an explanation of their funda-
mental role as part of a sealed system.
Compressor (Figure 4-1)
The compressor creates a high and low side pressure
difference in the sealed system. When the compressor
piston pushes, compressing the refrigerant gas, it caus-
ing the refrigerant pressure and temperature to rise
(high side pressure), while behind the piston, a vacuum
force is created (low side pressure).
The high-pressure/high-heat refrigerant gas is pushed
out the compressor discharge tube and through the
frame heater/hot gas tubing, routed around the door
gasket seat frame to prevent sweating. (On models
ICB424, this hot gas also travels through tubing by the
drain pan to help evaporate water in the drain pan.)
The high-pressure/high-heat gas then enters the con-
denser.
Condenser (Figure 4-2)
The high-pressure/high-heat gas travels through the
condenser tubing, where most of the heat in the refrig-
erant is drawn out and dissipated into the room by the
cooler ambient air that is being drawn over the con-
denser tubing (referred to as heat transfer). This
changes the gas into a high-pressure warm liquid
before it enters the high-side filter-drier.
Filter-Drier (Figure 4-2)
The high-pressure warm liquid travels through the high-
side filter-drier, where the desiccant pellets inside the
drier remove moisture from the refrigerant before it
enters the dual refrigerant valve.
Dual Refrigerant Valve
The tubing that is part of the dual refrigerant valve is a
T-connection with a bead inside. This bead is forced to
one side of the T-connection, or the other, depending
on the electrical signal from the control board to the
valve solenoid. When the bead is to one side of the T-
connection, that side is closed, the other side is open.
The open side of the dual refrigerant valve T-connection
allows the high-pressure warm liquid to enter the appro-
priate capillary tube.
7011544 - Revision A - November, 2008
International W
International W
(Figure 4-3)
ine Storage
ine Storage
(ICB400)
(ICB400)
COMPRESSOR
Figure 4-1. Compressor
COMPRESSOR
Figure 4-2. Condenser & Filter-Drier
COMPRESSOR
DUAL REFRIGERANT VALVE
(NOTE: ONE SIDE OPEN AT A TIME.)
Figure 4-3. Refrigerant Valve(s)
4-4
Series
Series
FRAME HEATER (HOT GAS)
FRAME HEATER (HOT GAS)
CONDENSER
FILTER-DRIER
FRAME HEATER (HOT GAS)
CONDENSER
FILTER-DRIER