2013/09 - Kessel

1. Safety precautions
Caution - Heavy weight
The pre-assembled chamber base sections (excluding pump(s)) of the KESSEL Aqualift F weigh between
40 and 60 kg depending on the model, the manhole covers weigh between 38 and 58 kg and an
individual pump weighs approximately 39 kg. The Aqualift F components should be handled with appropriate
equipment (e.g. safety shoes, back support, winching devices).
Health Safety
The Aqualift F is designed to pump wastewater containing untreated raw sewage which may pose a
health hazard. It is important that no direct or indirect contact between the Aqualift F and skin, eyes or
mouth occurs. If contact does occur it is important to immediately wash and disinfect the contaminated
area. In addition, the atmosphere inside the pump station chamber can also pose a health risk. Before
entering the chamber be sure to properly vent the entire chamber. During access an active ventilation
system must also be in place and operating. It is recommended that anyone entering the chamber
is equipped with a portable multi-warning device with audible and optical alarm. This person should be
harnessed to a hoisting device set up above the cover of the chamber – this hoisting device should be
operated by a second individual. KESSEL recommends that an approved portable multi gas warning
device with optical and acoustic alarm is worn by the party entering the pumping station.
Noise
During operation of the Aqualift F pumps emit noise. Based on the installation of the Aqualift F this could
present a nuisance. If on-site noise regulations come into effect, appropriate actions may need to be
taken. Take care in selecting the installation location of the system.
Pump operation / commissioning of the pumps
Before placing the pump(s) into operation please observe the conditions on site. Proper operation of
the pumps is a basic requirement to assure their explosion safety rating which they offer.
• Dry-running or semi-submersion running of the pumps must not occur! The cutting blades, impeller
and pump housing must always be fully submerged underwater.
• The minimal submersion level must always be maintained!
• The pump(s) may not be placed into operation when people are located in the wastewater
storage area of the pumping systems.
• During operation, the pump(s) build up a pumping pressure.
Surrounding conditions / lighting
Any additional equipment brought into the pumping station (such as external lighting or power tools)
must be equipped with the explosion proof rating.
EX
Explosion protected components of the pumping system are identified by the Ex and ATEX symbols on
the identification stickers of the pump and control unit.
Information concerning the Explosion Proof Rating
The set up of systems in an explosion risk area must follow the 94/9/EG (ATEX 100a).
The motors can be connected to low voltage with nominal voltage and voltage tolerance according to
IEC 38 or other power sources with a supply tolerance of plus / minus 10%.
The pump(s) are to be secured with an overload breaker. This is controlled inside the system´s control
unit by:
- Current limiter (motor protection switch according to EN 60 974-2). Motor will turn itself off with a
factor 1.15 rated current within 15 minutes.
- Temperature limiter within an integrated bimetallic switch in the stator.
The motors can also be operated with a frequency converter. In this case the pump ratings must be considered
and not exceeded. In order to prevent overheating, pumps operating with a frequency converter
must be equipped with an internally installed bimetallic switch in the stator. The pump must be capable
of shutting off when the temperature limit has been reached in order to conform with ATEX 100a regulations.
This shut off system must be connected to the intended measurement switch to assure that
the system complies with the required temperature class.
41