U-Line CLRCO2175 Service and Repair, Air flow in at evaporator blade, 3-18, Thermistors, Defrost

Models: 2175R 2115R 2115WC 2175/2275DWRR 2115WCOL 2175BEV 2175WC 2175RF CLR2160 CO2175/CO2275DWR CO2175F CLRCO2175 2275DWRWOL 2175WCOL 2275DWRWS

1 180
Download 180 pages 38.87 Kb
Page 33
Image 33
Air flow in at evaporator blade

Section 3 - Service and Repair

Air flow in at evaporator blade

Air flow out at evaporator outlet

Air passes though fin tube evaporator

Condensate drains down trough under evaporator, into drain pan, and into condensate pan through drain hose. The drain trough is warmed during defrost by contact with evaporator fins and drain heater attached to the drain pan.

ULIN_0370_A

Figure 12. CO2175R & 2175RF Only: Typical Frost Free Airflow Configuration

THERMISTORS

Three or four thermistors are employed. All are of the type 2. These measure the refrigerator, freezer, ice maker, or evaporator drain pan.

REED SWITCH

These units defrost on time and temperature. The Defrost Cycle runs for a minimum of 18 minutes (adjustable), and stops at a maximum of 45 minutes or when T4 reaches 42°F (non- adjustable), whichever comes first.

A reed switch is mounted to the underside of the cabinet and a magnet is mounted to the door. When the door is closed the magnet trips the switch which turns the light and display off.

For the CO2175DWR model there is a second reed switch mounted on the inside rear left corner of the top drawer.

Both drawers are monitored individually; however, when either drawer is opened both cabinets light and the displays energize.

DEFROST

3-18

Page 33
Image 33
U-Line CLRCO2175 Service and Repair, Air flow in at evaporator blade, Air flow out at evaporator outlet, 3-18, Thermistors