Checking The Direction Of Rotation - Wilo Drain MTC 32 F 39-55 Notice De Montage

English
7.2.4 Star switching MTC 32 F 39
U(L1) V(L2)
1 2
X
* = Marking for motor protection with PTC thermistors
Y = Squeezing connector (not as standard)
X = Plug connection
8 Commissioning
DANGER! Risk of fatal electrical shock!
The pump must not be used for draining swim-
ming pools, garden ponds or similar installations
if there is someone in the water.
CAUTION! Danger of damage!
Before installation, clear the sump and the sup-
ply pipes of all solid materials such as rubble.

8.1 Checking the direction of rotation

(three-phase AC motors only)
WARNING! Risk of injury!
Jerking occurs when the freely suspended pump
is switched on. People may be injured if the
pump drops down. Make sure that the pump is
safely suspended and cannot fall.
The rotating impeller creates an increased risk
of injury. Do not reach into the pump housing
during operation.
The pumps are checked for the correct direction
of operation and set at the factory.
Check that the pump is rotating in the correct
direction before submersion.
• To do this, suspend the pump safely in a hoist.
• Manually switch on the pump briefly. When this
is done, you should be able to see the pump jerk
in a direction opposite to the direction of
motion.
If the direction of rotation is incorrect, proceed as
follows:
• When using Wilo switchgears:
Wilo switchgears are designed so that the con-
nected pump is operated in the correct direction
of rotation. If the direction of rotation is wrong,
2 phases/conductors of the mains power supply
to the switchgear must be swapped.
• For onsite switchboxes:
For motors with direct starting, swap 2 phases.
For motors with star-delta starting, swap the
connections of two windings, e.g. substitute U1
for V1 and U2 for V2.
16
40* 41*
30 32
W(L3)
3 4 5
Y
9 Maintenance
Have maintenance and repair work carried out by
PE
qualified personnel only!
WARNING! Risk of infection!
Wear appropriate safety clothing (gloves) to
prevent the risk of infection while performing
maintenance work.
DANGER! Risk of fatal injury!
Take appropriate steps to prevent all danger
posed by electrical currents
• Before all maintenance and repair work, discon-
nect the pump from the power supply, and make
sure it cannot be switched back on by unauthor-
ised persons.
;
• Any damage to the connection cable should be
repaired only by a qualified electrician. For
safety reasons, carry out maintenance work
only in the presence of a second person.
• Before performing any work:
1. Disconnect the pump from the mains.
2. Check the rubber hose for mechanical and
chemical damage.
• DANGER! Risk of injury!
When using a chain to lift the pump, observe the
relevant accident prevention regulations (e.g.
18.4 Maschinenbau- und Metall-Berufsgenos-
senschaft: Professional Association for the
Mechanical Engineering and Metalworking
Industry). Chains should be checked regularly by
an expert.
NOTE: Motors in this series concur with the "Pres-
sure-proof enclosure" protection class. Repair
work affecting the explosion protection may only
be carried out by authorised companies or by the
manufacturer. When repair work is carried out, the
gap-defining surfaces must be checked for dam-
age, and replaced with original parts from the
manufacturer if necessary.
To maintain proper functioning, the first oil
change should be performed after 300 operating
hours, followed by an oil change every 1000 oper-
ating hours thereafter. For low operating hours,
the first oil changes and all later oil changes should
be carried out at least once a year. If you notice a
decrease in pump output, increase in operating
noise, or diminishing of cutting power (tendency
for the pump to become blocked), check the
macerator and impeller for wear and adjust as
necessary, or contact our after-sales service
department for replacements.
9.1 Checking the oil chamber
The opening for filling and draining the oil cham-
ber is sealed externally by a sealing plug (SW 13)
("Oil" is written on the housing). To check the
mechanical seal, drain the oil from the oil chamber,
including all residual amounts (for pumps posi-
tioned at an angle), into a clean measuring con-
tainer. If visual inspection reveals that the oil
contains water (appears milky), the oil should be
changed (see Changing oil) and checked again
after 300 operating hours or max. 6 months. If,
however, the oil contains water and contami-
WILO SE 01/2009