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.