English (GB)
18
Thermal overload switch
The pump has a built-in thermal overload switch with
the following data: 250 VAC / 1.6 A, cos φ 0.6.
The switch is a potential-free normally closed contact
which opens when the pump temperature becomes
too high and closes again when the pump has cooled
to normal temperature.
To provide overload protection, connect the switch to
an external thermal overload switch (figs 12 and 13
at the end of these instructions) or fit a Grundfos
protection or relay module.
If the pump is protected via an overload relay, i.e.
motor current only and not using the built-in switch,
the relay must be adjusted to the pump full-load
current (stated on the pump nameplate) according to
the selected speed. See fig. 20 at the end of these
instructions.
Start/stop input (basic module/relay module)
External potential-free contact.
Maximum load: 250 V, 1.5 mA.
Minimum load: 100 V, 0.5 mA.
Operating/fault signal output (relay module)
Internal potential-free changeover contact.
Maximum load: 250 V, 2 A, AC.
Minimum load: 5 V, 100 mA, DC.
11. Disposal
This product or parts of it must be disposed of in an
environmentally sound way:
1. Use the public or private waste collection service.
2. If this is not possible, contact the nearest
Grundfos company or service workshop.
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