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Slide 1This is the Schematic Diagram for the 30” All
Refrigerator.
In order to begin this training move the cursor over the Main Power Switch. Using your mouse, left Click the switch to begin.
30” All Refrigerator Schematic
COOLING OPERATION
When the Main Power switch is turned on, Line Voltage and Neutral are sent to the High Voltage board. Line Voltage is supplied at E10 (L) and Neutral is supplied at E9 (N). This supplies the on-board transformer to provide DC operating voltage.
Continue
COOLING OPERATION
The N.C. Light Relay supplies Neutral to the cavity lights and the Sabbath Mode Relay.
When set to Sabbath Mode via the Keypad input, the Light relay is energized. This removes the Neutral side from the cavity lights and Sabbath relay coil.
This is explained under Sabbath Mode Section
Continue
COOLING OPERATION
Line Voltage is also supplied from the Main Power switch to E3. This is the common Line voltage feed for the Compressor Relay and the Evaporator Fan relay.
Continue
COOLING OPERATION
When the unit is switched ON and the temperature is set, the DC Fan Relay energizes and sends 30 VDC from E1 to Terminal # 4 in the Temperature Translator. This is connected to the coil of the SPDT relay.
COOLING OPERATION
30” All Refrigerator Schematic
30 VDC enters the Temperature translator and the internal relay energizes. The Relay contact closes to the Normally open contact
COOLING OPERATION
30” All Refrigerator Schematic
With the relay engaged, the 180k resistor is brought into the circuit The board reads this as a temperature of approximately 11° F.
COOLING OPERATION
< 180k
The LV board thinks the simulated Freezer is too warm and will turn on the cooling system.
The L.V board will now close the compressor relay on the H.V. board. 120 volts is sent to the inverter and the condenser fan motor.
COOLING OPERATION
< 3.5 volts D.C.
At the same time 3.5 Volts D.C is sent to the inverter
The compressor and condenser fan motor will begin operation
Click mouse to advance
Click mouse to advance
COOLING OPERATION
At the same time that the compressor and condenser fan motor are running, the evaporator fan relay also closes.
120 volts is sent to the upper door switch (N.O.) as well as the N.C. contact of the Sabbath mode relay
30” All Refrigerator Schematic
From there, the voltage enters the temperature translator and supplies primary voltage to the internal transformer
Continue
COOLING OPERATION
With power supplied to terminals 1 (L) and 2 (N) of the internal transformer of the Temperature Translator , 24 VDC is produced on the secondary side at terminals #5 and #6.
24 volts is sent to the upper and lower cavity fan motors. The fan motors activate and begin to circulate air throughout the compartment.
30” All Refrigerator Schematic
COOLING OPERATION
When the Fresh Food Compartment is cold enough, the thermistor is read by the LV Board. The L.V. board will now need to cycle off the fans and the compressor.
30” All Refrigerator Schematic
30” All Refrigerator Schematic
The L.V. board now opens the DC fan relay, removing the 30 volts being sent to the internal relay, terminal #4 of the temperature translator.
Continue
30” All Refrigerator Schematic
The relay now closes the N.C. contact. This removes the 180k resistor from the circuit and brings the 560k on-line.
Continue
< 560k
With the relay engaged, the 560k resistor is brought into the circuit The board reads this as a temperature of approximately -23° F.
The L.V board interprets this as a satisfied Freezer Thermistor and will now shut off the cooling system.
30” All Refrigerator Schematic
COOLING OPERATION
The L.V. board now opens both the compressor relay and the evaporator fan relay.
30” All Refrigerator Schematic
COOLING OPERATION
With the compressor relay open, we no longer have 120 volts to the compressor and condenser fan motor.
30” All Refrigerator Schematic
COOLING OPERATION
At the same time, the Evaporator fan relay also opens. With the primary voltage removed from the Temperature Translator, we remove our 24 VDC to the evaporator fans.
The unit has now shut off.
30” All Refrigerator Schematic
Continue
In order to begin this training move the cursor over the Main Power Switch. Using your mouse, left Click the switch to begin.
30” All Refrigerator Schematic
COOLING OPERATION
When the Main Power switch is turned on, Line Voltage and Neutral are sent to the High Voltage board. Line Voltage is supplied at E10 (L) and Neutral is supplied at E9 (N). This supplies the on-board transformer to provide DC operating voltage.
Continue
COOLING OPERATION
The N.C. Light Relay supplies Neutral to the cavity lights and the Sabbath Mode Relay.
When set to Sabbath Mode via the Keypad input, the Light relay is energized. This removes the Neutral side from the cavity lights and Sabbath relay coil.
This is explained under Sabbath Mode Section
Continue
COOLING OPERATION
Line Voltage is also supplied from the Main Power switch to E3. This is the common Line voltage feed for the Compressor Relay and the Evaporator Fan relay.
Continue
COOLING OPERATION
When the unit is switched ON and the temperature is set, the DC Fan Relay energizes and sends 30 VDC from E1 to Terminal # 4 in the Temperature Translator. This is connected to the coil of the SPDT relay.
COOLING OPERATION
30” All Refrigerator Schematic
30 VDC enters the Temperature translator and the internal relay energizes. The Relay contact closes to the Normally open contact
COOLING OPERATION
30” All Refrigerator Schematic
With the relay engaged, the 180k resistor is brought into the circuit The board reads this as a temperature of approximately 11° F.
COOLING OPERATION
< 180k
The LV board thinks the simulated Freezer is too warm and will turn on the cooling system.
The L.V board will now close the compressor relay on the H.V. board. 120 volts is sent to the inverter and the condenser fan motor.
COOLING OPERATION
< 3.5 volts D.C.
At the same time 3.5 Volts D.C is sent to the inverter
The compressor and condenser fan motor will begin operation
Click mouse to advance
Click mouse to advance
COOLING OPERATION
At the same time that the compressor and condenser fan motor are running, the evaporator fan relay also closes.
120 volts is sent to the upper door switch (N.O.) as well as the N.C. contact of the Sabbath mode relay
30” All Refrigerator Schematic
From there, the voltage enters the temperature translator and supplies primary voltage to the internal transformer
Continue
COOLING OPERATION
With power supplied to terminals 1 (L) and 2 (N) of the internal transformer of the Temperature Translator , 24 VDC is produced on the secondary side at terminals #5 and #6.
24 volts is sent to the upper and lower cavity fan motors. The fan motors activate and begin to circulate air throughout the compartment.
30” All Refrigerator Schematic
COOLING OPERATION
When the Fresh Food Compartment is cold enough, the thermistor is read by the LV Board. The L.V. board will now need to cycle off the fans and the compressor.
30” All Refrigerator Schematic
30” All Refrigerator Schematic
The L.V. board now opens the DC fan relay, removing the 30 volts being sent to the internal relay, terminal #4 of the temperature translator.
Continue
30” All Refrigerator Schematic
The relay now closes the N.C. contact. This removes the 180k resistor from the circuit and brings the 560k on-line.
Continue
< 560k
With the relay engaged, the 560k resistor is brought into the circuit The board reads this as a temperature of approximately -23° F.
The L.V board interprets this as a satisfied Freezer Thermistor and will now shut off the cooling system.
30” All Refrigerator Schematic
COOLING OPERATION
The L.V. board now opens both the compressor relay and the evaporator fan relay.
30” All Refrigerator Schematic
COOLING OPERATION
With the compressor relay open, we no longer have 120 volts to the compressor and condenser fan motor.
30” All Refrigerator Schematic
COOLING OPERATION
At the same time, the Evaporator fan relay also opens. With the primary voltage removed from the Temperature Translator, we remove our 24 VDC to the evaporator fans.
The unit has now shut off.
30” All Refrigerator Schematic
Continue
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