Power Supply with AFS for Trion HE Series

Retrofit 348818-001A as F858-0475 replacement

The Trion power supply 348818-001A with transformer 239071-008 can be used as replacement for power supply F858-0475. It does require some creativity and soldering to install inside a White-Rodgers power box. See PDF document for photo details.

F858-0475 or F858-1001	348818-001A w/ Transformer
Input: 120 vac 50/60 Hz Output: 6450 vdc	Input: 120 vac 50/60 Hz Output: 6200 vdc

1. Terminals J6 and J7 must be jumped together.

2. The Trion PS have an onboard air flow sensor. You can bypass it by moving jumper on JP9 terminal to "D" position.

3. The power supply needs to share same ground as the cells (chassis). The mounting hole on bottom right on the board is the ground connection. Underneath you should find soldering contact.

4. The indicator led light (red) solder can be removed from underneath the board and moved to power box indicator view using extra wiring. Green led indicates power source (transformer) is live.

• Replacement Instructions

Trion HE Power Supply 348818-001

The 348818-001 has been replaced by the 348818-001A. The original 348818-001 had a separate circuit board for the air flow sensor 248090-001. Photo below shows the thermistor on the air flow sensor daughter card.

The photo below shows the revised 348818-001A. The new power supply does not use an AFS daughter card. The AFS thermistor and circuitry is now included and mounted directly on the 348818-001A power supply board.

Trion HE Series Air Flow Sensor

The HE Series has a built-in air flow sensor. When the blower is running, the vacuum in the duct will cause air to be drawn in thru the hole shown below.

A thermistor on the back side of this hole will sense the air flow. The thermistor heats up to 130° and when cooled by air flow will power up the HE2000. Blowing in to this hole with a straw will also power up the unit.

Trion HE & SE Switch Wiring

Photo below shows the switch wiring for the HE and SE series. The Interlock and on-off switch is wired in series and connect to the power supply (348818-001). The orange wire connects to J6. The white/orange wire is connected to J7. Hover over the photo to zoom in.