Power Door Assembly for Aprilaire 5000 Models 2004 and Earlier

Aprilaire 5000 Series 1 and 2

The Aprilaire 5000 electronic air cleaner was redesigned in May of 2005. The new Model 5000 now has a wider frame, the earlier 5000 was 11-3/8" wide and the new 5000 has a 12" wide frame. The access door / power pack was also made wider as well as equipped with a new latch design. The new 5000 also has longer ionizing wires, 25" where as the earlier model had wires 24-15/16" in length. The stainless mounting bracket for the ionizing wires was also changed.

The new Model 5000 has identical performance to the earlier. The new 5000 uses the same internal power supply, same ionizer frame, same filter housing and same 501 filter.

The photo below shows the new and old model 5000. Most notably the door is different.

Built-In Air Flow Sensor

• Sensing Relay RP-51

When first released the Aprilaire 5000 came with a built-in air flow sensor. These models were manufactured from 2000 to 2002.

The Series One replacement power pack is only available without the air flow sensor. If replacing a power pack with a built-in air flow sensor, then you will need an outlet that is only powered when the blower is running. See the RP-51.

Photo below shows the power pack with the air flow sensor.Photo below shows a newer Series One power pack door. This power pack does not have the second smaller circuit board. Most new furnaces provide an EAC connection.

Aprilaire 5000 Wiring

• Sensing Relay RP-51

The Aprilaire 5000 should be plugged in to an outlet that is only powered when the furnace blower is running. Most new furnaces provide a connection for an electronic air cleaner (EAC). If an EAC connection is not available, see the Aprilaire Model 51 current sensing relay.

See the schematic pasted on the inside of your furnace door. Photo below shows the EAC connection in our furnace.

For wiring, see Page 7 of Aprilaire 5000 Installation Manual.