Pump Position; Electrical Connection; Terminal Box Positions - Grundfos MTD Montage- Und Betriebsanleitung

4.2 Pump position

The pump can only be mounted in vertical position.
Provide a clearance of minimum 50 mm above the
motor to ensure cooling of fan-cooled motors.
The pump is designed for indoor operation only.
Fig. 2 Mounting position
Make sure that there is always a clearance of 25 mm
to the mounting flange. Note that a minimum
clearance of 30 mm from the pump inlet to the
bottom of the tank is required.
Fig. 3 Required clearance for pump inlet and
mounting flange
The motor must not be exposed to direct
water or liquid sprays.

4.3 Electrical connection

WARNING
Electric shock
Death or serious personal injury
- Before starting any work on the product,
make sure that the power supply has
been switched off and that it cannot be
accidentally switched on.
- Connect the pump to an external main
switch close to the pump and to a
motor-protective circuit breaker or a
CUE frequency converter. Make sure
that you can lock the main switch in
OFF position (isolated). Type and
requirements as specified in EN 60204-
1, 5.3.2.
The electric motor must be connected to the supply
as shown in the diagram inside the terminal box
cover.
The pump must be earthed. The electrical
connection must be carried out in accordance with
local regulations.
We do not recommend operation via
frequency converter.
The operating voltage and frequency are marked on
the motor nameplate. Make sure that the motor is
suitable for the power supply on which it will be used.
The motor must be connected to a motor-
protective circuit breaker.
Single-phase Grundfos motors incorporate a thermal
switch and require no additional motor protection.
Three-phase motors must be connected to a motor-
protective circuit breaker.

4.3.1 Terminal box positions

The terminal box can be turned to another position.
Position 3 Position 6
o'clock o'clock
Fig. 4 Terminal box positions, top view
Proceed as follows:
1. Remove the bolts securing the motor to the
pump.
2. Turn the motor to the required position.
Refit and tighten the bolts securing the motor to the
pump.
Position 9 Position 12
o'clock o'clock
7