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31318G 

12. PARTS LIST

 

The following is a list of parts found in the NRS Model ELC 12/20-D (Dual Voltage) and –S (Single Voltage). When 
replacing a part, USE ONLY ORIGINAL FACTORY REPLACEMENT PARTS of the correct size and rating. 
 
 
 

PART 

NO. 

QTY.  DESCRIPTION 

       

 
 

22305S 

TRANSFORMER ASSEMBLY (12/20-S) 

 

22295S 

TRANSFORMER ASSEMBLY (12/20-D) 

 18696S 

SHUNT 

ASSEMBLY 

 

31306S 

CONTROL MODULE (W/ ELECTRONIC BOARD #21505) 

 

31104S 

CONTROL MODULE MOUNT 

 31179S 

CONTROL 

CABLE 

 

31102S 

BASE ASSEMBLY (12/20-D) 

 

31329S 

BASE ASSEMBLY (12/20-S) 

 31128S 

COVER 

ASSEMBLY 

 05322S 

FUSEHOLDER 

ASSEMBLY 

 

15834S 

FUSE, 4 AMP (12/20-D) 

 

31304S 

CIRCUIT BREAKER ASSEMBLY 

 

31177S 

AC SWITCH ASSEMBLY (12/20-D ONLY) 

 

27317S 

AMMETER, 25 AMP 

 14197S 

BUSHING, 

1" 

 

14123S 

TEMPERATURE TRANSDUCER, 10' (BOX W/ ADHESIVE) 

 

14124S 

TEMPERATURE TRANSDUCER, 20' (BOX W/ ADHESIVE) 

 

14126S 

TEMPERATURE TRANSDUCER, 30' (BOX W/ ADHESIVE) 

 

29741S 

TEMPERATURE TRANSDUCER, 10' (W/ TERMINAL) 

 

29742S 

TEMPERATURE TRANSDUCER, 30' (W/ TERMINAL) 

 

31344S 

HEATSINK ASSEMBLY, W/ SCR 

 

26769S 

SCR ASSEMBLY, 22 AMP 

 

14417S 

OUTPUT CAPACITOR, C, 10,000 UF, 50V 

 

14786S 

DIODE ASSEMBLY, D 

 

18796S 

CAP ASSEMBLY, W/ DIODE ASSEMBLY 

 

14759S 

VARISTOR ASSEMBLY, VR2, 130V  

 

31171S 

TAP STRIP ASSEMBLY (12/20-D) 

 

31309S 

VARISTOR ASSEMBLY, VR1, 320V 

 

31327S 

TAP STRIP ASSEMBLY (12/20-S) 

 

31301S 

DOOR LATCH, BASE 

 

31302S 

DOOR LATCH, STUD 

 

19623S 

FUSE, 8 AMP (12/20-S) 

 
The adhesive used on the temperature probes (#s 14123S, 14124S, and 14126S) is 3M Scotch #Y-9473, which is 
a thermally conducting, two-sided adhesive tape.  If a replacement adhesive is needed, use this type of tape or an 
equivalent adhesive. 
 

Summary of Contents for ELC-12/20-D

Page 1: ... when the battery is charging in an enclosed area d Batteries contain caustic material which may cause burns Do not get in eyes on skin or clothing If the gelled or liquid content of the batteries contacts the skin or clothing wash the area thoroughly with water In the case of contact with the eyes flush immediately with clean water for 15 minutes and obtain medical attention e Only qualified pers...

Page 2: ...probe is not being used or the temperature probe is working improperly Temperature compensation uses a temperature reference of 77 F 25 C a voltage reference of 2 23 volts the voltage of a standard gel cell battery at 77 F and a compensation value of 3 0 mV per F The equivalent equation for the compensated voltage is Vcomp V k t 77 F Where V is the voltage of the battery at 77 F t is the temperatu...

Page 3: ... AS POSSIBLE IN THE BUNGALOW OR CABINET Terminal Type Probe The terminal type probe should be attached to the negative battery post near the center of the battery pack If the threaded stud is long enough above the battery jumper nut attach the probe with another nut Torque this nut to proper specifications If the stud is too short the nut holding the jumper wire will need to be removed Open or rem...

Page 4: ... of the batteries b Check the AC voltage selection switch for the proper setting c Check the fuses to make sure they have not blown d Check the circuit breaker to see if it has opened and push it in to reset it if necessary e Check the polarity between DC output and the battery and make sure their connections are tight f Remove the small cover on the front of the charger and make sure all of the b...

Page 5: ...LY 27317S 1 AMMETER 25 AMP 14197S 4 BUSHING 1 14123S 1 TEMPERATURE TRANSDUCER 10 BOX W ADHESIVE 14124S 1 TEMPERATURE TRANSDUCER 20 BOX W ADHESIVE 14126S 1 TEMPERATURE TRANSDUCER 30 BOX W ADHESIVE 29741S 1 TEMPERATURE TRANSDUCER 10 W TERMINAL 29742S 1 TEMPERATURE TRANSDUCER 30 W TERMINAL 31344S 1 HEATSINK ASSEMBLY W SCR 26769S 1 SCR ASSEMBLY 22 AMP 14417S 1 OUTPUT CAPACITOR C 10 000 UF 50V 14786S 1...

Page 6: ...www nationalrailwaysupply com 1 800 357 3572 6 31318G 13 WIRING DIAGRAM ...

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