Key facts
- Brand
- Fleck
- Model
- 5800 LXT
- Documents
- 3
- Languages
- EN
- Last added
- 2026-10-22
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Fleck 5800 LXT Water Softener Control Service Manual
This document serves as a service manual for the Fleck 5800 LXT downflow/upflow water softener control. It provides detailed instructions for dealer use, including system configuration charts, job specification sheets, and installation procedures for the control valve, powerhead, meter, and bypass valves. The manual emphasizes safety precautions regarding water pressure, temperature, and electrical connections.
Read onlineFLECK 5800 LXT specifications
| Operating Voltage | 120 VAC |
|---|---|
| Control Voltage | 12 VDC |
| Minimum Water Pressure | 20 psi (1.4 bar) |
| Maximum Water Pressure | 125 psi (8.6 bar) |
| Maximum Water Temperature | 110°F (43°C) |
| Minimum Operating Temperature | 32°F (0°C) |
| Maximum Operating Temperature | 125°F (52°C) |
| Drain Line Size (Residential) | 1/2" (13 mm) |
Source: Fleck 5800 LXT Water Softener Control Service Manual
All FLECK 5800 LXT documents by type
Disassembly, diagnostics and part numbers, for repair.
Questions answered in these manuals
What happens if power is interrupted for more than 8 hours?
The controller may lose the time setting and it must be re-entered when power is restored.
How can a regeneration be triggered immediately?
Press and hold the Extra Cycle button for five seconds.
What is the minimum water pressure required for the regeneration valve to operate effectively?
A minimum of 20 pounds (1.4 bar) of water pressure is required for the regeneration valve to operate effectively.
From: Fleck 5800 LXT & SXT Downflow/Upflow Service Manual
What are the maximum limits for water pressure, water temperature, and freezing conditions?
Water pressure must not exceed 125 psi (8.6 bar), water temperature must not exceed 110°F (43°C), and the unit cannot be subjected to freezing conditions.
From: Fleck 5800 LXT & SXT Downflow/Upflow Service Manual
What is the maximum water pressure rating for this unit?
The maximum pressure rating is 125 psi (8.6 bar), though daytime pressure can exceed 80 psi if a regulator is installed.
What are the minimum and maximum water temperatures for installation?
The unit must not be installed where temperatures drop below 32°F (0°C) or rise above 125°F (52°C).