Power Supply for dual cell F50A and F50E 240v 16x25 20x20. Ionizer current is set by jumper for 1.65mA or 2.1mA. See Setting Ionizer Current below. This power supply is for power boxes with the W8600 terminal strip and without the air flow sensor. Honeywell 2 year warranty.
The circuit board has an approximate size of 4½ x 6½ x 1¾ inches. This kit includes the power supply with the wiring harness and terminal strip. Also included is the metal base.
Replaces 208427P. For 120v use the 207427AB or 208420A.
The 208427AC power supply provides the connection for the W8600 remote indicator. The 208427AC is for a power box with the terminal strip as in photo below on right. The 208427 has a w8600e daughter card and includes the wiring harness and terminal strip for the W8600E.
If your powerbox has an unused terminal strip because you are not using the W8600, you can use this power supply and internally not connect the unused terminal strip.
The 208427 series provides a connection for the W8600E whereas the 208425 series does not. For 120v use the 207427AB or 208420A.
The 208427AC does not require an air flow sensor. This power supply runs as soon as 120v is applied. Used in an F50E that is wired to the furnace blower or through a sail switch.
This power supply has been configured for use in a power box without the air flow sensor. The animated photo below shows a power box with and without the air flow sensor.
Honeywell has disabled the air flow sensor feature by cutting the jumper J8. Restoring the jumper will allow the use of an air flow sensor. If your F50A-F50E power box has the air flow sensor and it is needed, then you need to replace the complete power box with the 208420A.
Here is a PDF with high resolution photos of the F50E power box. The photos show the box stripped and then with a new 208427AB installed. Also shown is a photo and schematic of the switch with the neon lamp.
Also see the PDF showing the uncommon edge connector and the piggy back connector.
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