Multi 2 Twin Pump Control Panel | Duty/Assist, 4 Float Inputs
Built for the job
Multi 2 twin pump control panel for duty/assist sumps and pump stations
Runs two submersible pumps from four float switches, alternates them to share the running hours, and brings the second pump in when the level keeps rising.
The Multi 2 is an electronic control panel for two pumps in a sump, chamber or pump station. It gives each pump its own adjustable overload, motor thermal (klixon) protection and manual / off / auto control, with high level alarm outputs for a siren, a flashing beacon and a volt-free contact. It is available for 230V single phase and 400V three phase pumps up to 11kW, in thermoplastic or steel enclosures, and in two versions with the siren and beacon built in.
Part of our pump accessories and float switches range.
How the four floats work
Each float has its own pair of terminals, so the panel always knows which level has been reached.
In sewage mode, from the bottom up: the stop float (terminals 1-2), the pump 1 start float (3-4), the pump 2 start float (5-6) and the high level alarm float (7-8).
As the level rises the duty pump starts. The panel alternates which pump runs as duty, so both pumps share the work. If the level keeps rising, the second float brings in the other pump to assist. If it reaches the alarm float, both pumps run and the alarm outputs switch on.
The pumps keep running until the level drops below the stop float.
At a glance
- Two pumps, four float inputs: stop, pump 1 start, pump 2 start and high level alarm, each on its own terminals.
- Automatic alternation: the duty pump swaps each cycle to share running hours. Can be switched off.
- Adjustable overload for each pump: 2–18A (230V), 0.5–16A or 4–25A (400V).
- Motor protection: maximum current, klixon thermal overload, minimum and maximum voltage, and phase loss and sequence on three phase models.
- Alarm outputs: 2 x 12V DC (max 200mA) for a siren and flashing LED lamp, plus a volt-free contact (max 5A, NC-COM-NO).
- Works with floats, level probes or pressure switches: probe sensitivity adjustable from 10 to 100 kΩ.
- IP55 enclosures with side-hinged doors and external fixing lugs, so there is no need to drill the enclosure.
Which version do I need?
Choose the supply that matches your pumps, then the enclosure. The pump's running current must fall within the overload range of the version you choose.
| Model | Supply | Motor power | Motor current | Enclosure | Built-in siren and beacon | Size W x L x H | Weight |
|---|---|---|---|---|---|---|---|
| Multi 2-P-230 | 230V single phase | 0.37–2.2kW | 2–18A | Thermoplastic | No | 245 x 285 x 140mm | 2.2 kg |
| Multi 2-P-230VA | 230V single phase | 0.37–2.2kW | 2–18A | Thermoplastic | Yes | 245 x 285 x 140mm | 2.7 kg |
| Multi 2-M3-230 | 230V single phase | 0.37–2.2kW | 2–18A | Steel, 300 x 300mm | No | 300 x 300 x 150mm | 7.3 kg |
| Multi 2-M4-230 | 230V single phase | 0.37–2.2kW | 2–18A | Steel, 300 x 400mm | No | 300 x 400 x 150mm | 8.8 kg |
| Multi 2-P-400-10 | 400V three phase | 0.37–7.5kW | 0.5–16A | Thermoplastic | No | 245 x 285 x 140mm | 2.8 kg |
| Multi 2-P-400-10VA | 400V three phase | 0.37–7.5kW | 0.5–16A | Thermoplastic | Yes | 245 x 285 x 140mm | 3.3 kg |
| Multi 2-P-400-15 | 400V three phase | 2.2–11kW | 4–25A | Thermoplastic | No | 300 x 380 x 150mm | 4.2 kg |
| Multi 2-M4-400-15 | 400V three phase | 2.2–11kW | 4–25A | Steel, 300 x 400mm | No | 300 x 400 x 150mm | 10.1 kg |
Thermoplastic enclosures close with two side screws. Steel enclosures have a key lock.
Setting up
- Operating mode: sewage, clean water or pressure boosting, set by DIP switch.
- Pump alternation: on or off by DIP switch.
- Voltage protection: on or off by DIP switch. Trips below 185V or above 255V on single phase, and below 345V or above 440V on three phase.
- Overloads: one trimmer per pump. Turn it to full scale, run the pump, turn it down until the protection light comes on, then increase the setting by 20%.
- Resetting: alarms reset automatically, except motor overcurrent, which resets by holding the button for 2 seconds.
Adding an alarm
The P-230VA and P-400-10VA versions have a siren and flashing beacon built in. Every version has 12V DC outputs for a siren and flashing lamp and a volt-free contact, so a separate alarm unit or a GSM dialler can be connected instead. For the other versions, our Basic Alarm in 12V DC connects to the panel's 12V alarm outputs.
Images are representative and may not show the exact model selected.
What's included
1 x Multi 2 twin pump control panel, in the version selected. Pumps, float switches and cable are not included.
Installation
We supply the panel only. It must be selected, installed, tested and certified by a qualified electrician to BS 7671, who should confirm that the pump's nameplate power and running current sit within the range of the version you choose, and that the supply, protection and float arrangement suit the site.
