Wilo Drain MTC 32, Installation And Operating Instructions Manual

Page: 37 / 348

Installation and operating instructions Wilo-Drain MTC 32 37
INSTALLATION English
Wilo-Drain MTC 32F 17...33 39...55
Maximum pump flow [Q]: See name plate
Activation type [AT]: See name plate
Liquid temperature [t]: 3 to 40 °C 3 to 35 °C
Protection class: IP 68 IP 68
Insulation class [Cl.]: F F
Speed [n]: See name plate
Max. submersion: 20 m 20 m
Explosion protection: ATEX ATEX
Free passage: 6 mm 7 mm
Discharge port (PN6):
DN 36/G 1¼/
G2
DN 32
Operating modes
Submerged [OT
S
]: S1 S1
Emerged [OT
E
]: S2 15 min* S3 30%*
Starts per hour
Recommended: - 20/h
Maximum: 15/h 50/h
* To ensure the motor is cooled sufficiently, it
must be completely flooded for at least one min
-
ute before it is switched on again!
4.6. Type code
Example: Wilo-Drain MTC 32F17.16/20/3-400-50-2-Ex
MTC
Gray cast waste water pump with macerator
32
Nominal discharge port diameter
F
Open multi-channel impeller
17 Max. pump head (m)
16
Maximum flow volume (m³/h)
20
/10 = rated output P2 (kW)
3
Motor version
1 = 1~
3 = 3~
400 Rated voltage
50
Frequency
2 Number of poles
Ex
With ATEX ex-approval
4.7. Scope of delivery
• Unit with 10 m cable and free cable end
• Installation and operation manual
4.8. Accessories (optionally available)
• Cable lengths up to 50 m in fixed increments of
10 m or individual cable lengths on request
• Suspension device
•
Pump pedestal
• External leak electrode
• Level controllers
•
Fixing accessories and chains
• Switching devices, relays and plugs
5. Installation
In order to prevent damage to the product or seri-
ous injury during installation, the following points
must be observed:
• Installation work – assembly and installation
of the machine – may only be carried out by
qualified persons. The safety instructions must be
followed at all times.
• The machine must be inspected for transport
damage before carrying out any installation work.
5.1. General requirements
For planning and operation of technical waste
water systems, pay attention the pertinent
local regulations and directives for wastewater
technology (such as the German Association for
Water, Wastewater and Waste).
Pay attention to pressure surges, in particu
-
lar with stationary installations where water is
pumped with longer discharge pipes (especially
with steady ascents or steep terrain).
Pressure surges can cause irreversible damage
to the unit/system and noisy operation result-
ing from valve knocking. This can be avoided by
taking appropriate measures (e.g. non-return
valves with adjustable closure time or laying the
discharge pipe in a special way).
After pumping water containing lime, clay or
cement, flush out the product with clean water
in order to prevent encrustation and subsequent
breakdowns.
If you are using level controllers, make sure that
the minimum water coverage is present. Air pock-
ets must not be allowed to enter the hydraulic
housing or the pipeline system, and they must
be removed with suitable bleeding equipment or
by inclining the product slightly (with a portable
installation). Protect the product from frost.
5.2. Types of installation
• Vertical stationary wet installation with suspen-
sion device
• Vertical portable wet installation with pump
pedestal
5.3. The operating area
The operating area must be clean, free of coarse
solids, dry, frost-free and, if necessary, de-
contaminated. It must also be suitable for the
product. When working in shafts, a second person
must be present for safety reasons. If there is risk
of poisonous or asphyxiating gases forming, the
necessary precautions must be taken!
When installing in shafts, the size of the shaft and
the cool-down time of the motor must be deter-
mined by the system planner, depending on the
ambient conditions prevailing during operation.
To keep dry motors sufficiently cooled when
they are not submerged, they must be flooded
completely before being switched back on!
It must be ensured that hoisting gear can be
fitted without any trouble, since this is required
for assembly and removal of the product. It must