Electrical Wiring
Read and carefully follow the manufacturer’s installation instructions before attempting to make any wiring connections. All wiring should be done in accordance with local codes and regulations. Always disconnect the power source before beginning any work in order to prevent electric shock or damage to the equipment.
Electronic air cleaners operate on regular 120-volt current and use less electricity than a 60-watt light bulb. Typical wiring connections for a Trane Model EAP-12A Electrostatic Air Cleaner are shown in Figure 12-24. A ground wire for this unit is required. No
ground wire is required for the return grille electronic air cleaner shown in Figure 12-25. Other than installing the ground wire (where required), wiring an electronic air cleaner generally consists of simply hooking the unit up to the power source.
When making external circuit connections to the line voltage lead wires of an electronic air cleaner, only connectors listed by Underwriters Laboratories should be used.
An electronic air cleaner can be connected electrically to the sys- tem blower motor or directly through a disconnect switch to the 120- volt power source. If the unit is connected to the system blower motor, the electronic cell will energize each time the blower operates.
As shown in Figure 12-25, resistors are installed in the circuit to bleed off the electrical charges that the collector plates, acting as capacitors, are capable of storing. As a result, the serviceperson and homeowner are protected against shock. On a unit that does not include bleed-off resistors in its circuit, the cell must be grounded out before it is touched.