KSB MK, Installation & Operating Manual

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5 Installation at Site
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MK
NOTE
The switching points - measured from the cover plate - are located at 300 mm for
"ON" and 800 mm (for installation depth 1000 mm) or 1700 mm (for installation
depth 1900 mm) for "OFF" and cannot be altered. The max. contact rating is 1 A;
for MK pumps separately at the tank.
5.3.1.3 EURO float switch control (non-ATEX applications only)
The pump set is started/stopped by the float switch in response to the fluid level.
The free length of the float's connection cable (= length from the attachment point
to the float switch) defines the fluid levels for starting/stopping the pump.
Float switches with 5, 10 or 20 m connection cable must only be used for fluids with a
maximum temperature of 70 °C.
5.3.2 Control element for MKY
Pump sets installed in heat transfer fluid and recirculating systems usually do not
need any control elements.
If the pump set is used for handling condensate at temperatures of up to 110 °C and
is installed at installation depths of 1000 mm or 1900 mm, it can be equipped with
magnetic float switch control. (
ð
Section 5.3.1.2, Page 22)
5.4 Installing the pump set
ü The installed motor is protected against flooding.
ü Motor and (optional) float switch are located outside the pit or tank.
ü Motor and (optional) float switch are ventilated and protected against moisture.
1. Remove the transport plugs from the volute casing and the discharge pipe.
2. For pump sets with installation depths of 1900 mm and 2800 mm without cover
plate (MK) fit the pipe union 731, which is supplied separately strapped to the
pump. (
ð
Section 9.1.2, Page 53) (
ð
Section 9.1.4, Page 55)
3. Place the pump set on the floor of a pit (approximately 500 x 500 mm) or, if the
pump set is installed in a tank, fit it to the tank edge with a cover plate.
4. If the pump set is installed in a pit without a cover plate and angular frame,
secure it to the pit wall using mounting clamps.
5.5 Connecting the piping
DANGER
Impermissible loads acting on the pump nozzles
Danger to life from leakage of hot, toxic, corrosive or flammable fluids!
▷ Do not use the pump as an anchorage point for the piping.
▷ Anchor the pipes in close proximity to the pump and connect them properly
without transmitting any stresses or strains.
▷ Take appropriate measures to compensate for thermal expansion of the piping.
CAUTION
Incorrect earthing during welding work on the piping
Destruction of rolling element bearings (pitting effect)!
▷
Never earth the electric welding equipment on the pump or soleplate.
▷ Prevent current flowing through the rolling element bearings.