GM4000A™ Switch Machine - Alstom

General Description1.7.3. Condensation HeaterThe GM4000A can be configured with at least one condensation heater. There are twoheaters available, and the switch machine may be ordered with one, both, or none:1. The 24 VDC heater produces approximately 30 watts at 19.2 ohms (± 10%).2. The 110 VDC/110 VAC heater produces approximately 30 watts at 441.0 ohms(± 10%).The condensation heater is used to reduce moisture caused by condensation in theGM4000A and prevent ice from forming in the cam bar slot.Figure 1-7 shows the condensation heater, while Figure 1-4 shows its location on amounting plate in the switch machine. The 24 VDC version faces the motor end, and the110 VDC/110 VAC version faces the terminal end. When both versions are installed,they are located on both sides of the mounting plate.EACH ASSEMBLY IS IDENTIFIED BY ITS PART NUMBER AND OPERATING VOLTAGE.ALSTOM PART NO.VOLTAGEVOLTAGEVOLTAGETHE WIRES FOR EACH ASSEMBLY IDENTIFY 110 OR 24 VOLT OPERATION.PRESSURE SENSITIVE ADHESIVE(THIS SIDE ONLY)Figure 1-7. Condensation HeaterP2496, Rev. 6, Jul/11 1-14 Alstom Signaling Inc.