Key facts
- Brand
- Fleck
- Model
- 5800 SXT
- Category
- Water heater
- Industry
- Appliances
- Documents
- 3
- Languages
- EN
- Last added
- 2026-09-30
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Fleck 5800 SXT Water Softener Controller Installer Manual
This installer manual covers the complete installation process for the Fleck 5800 SXT water softener controller, including safety requirements, system sizing, wiring, and valve connection details. It also describes the programming steps needed to set parameters such as regeneration time, flow rates, and reserve capacity.
Additional sections address commissioning, normal operation, routine maintenance, troubleshooting of common errors, spare parts lists, and end‑of‑life scrapping guidelines, ensuring users can safely and efficiently manage the system throughout its lifecycle.
Fleck 5800 SXT specifications
| Valve body material | Fiber‑reinforced polymer |
|---|---|
| Weight (valve with controller) | 2 kg (max) |
| Recommended operating pressure | 1.4 – 8.6 bar |
| Maximum inlet pressure | 8.6 bar |
| Hydrostatic test pressure | 20 bar |
| Water temperature range | 1 – 43 °C |
| Ambient temperature range | 5 – 40 °C |
| Continuous flow rate (3.5 bar inlet) | 4.7 m³/h |
| Peak flow rate (3.5 bar inlet) | 6.1 m³/h |
| Valve connections – tank thread | 2½" - 8 NPSM |
| Transformer input voltage | 100 to 240 VAC |
| Motor input voltage | 12 VDC |
| Controller max power consumption | 6 W |
| Protection rating | IP 22 |
Source: Fleck 5800 SXT Water Softener Controller Installer Manual
All Fleck 5800 SXT documents by type
Mounting, wiring and first power-up. Read it before the hardware goes in.
Disassembly, diagnostics and part numbers, for repair.
Questions answered in these manuals
What must be checked regarding safety tags during installation?
All safety tags on the device must be completely legible and clean; replace them with new tags if necessary.
From: Fleck 5800 SXT Water Softener Controller Installer Manual
How is the regeneration time (RT) set in the controller?
Enter the master programming mode and set the RT parameter under the regeneration time menu.
From: Fleck 5800 SXT Water Softener Controller Installer Manual
What is the minimum water pressure required for the regeneration valve to operate effectively?
A minimum of 20 psi (1.4 bar) of water pressure is required.
What voltage supply is required for the control unit?
An uninterrupted alternating current (120 VAC) supply is required.
What is the maximum water pressure rating for the unit?
The maximum pressure rating is 125 psi (8.6 bar).
Can the unit be installed outdoors?
Yes, but it must be used with a Listed Class 2 power supply suitable for outdoor use.