Level Sensor / Control - Kessel aqualift f Installation, Operating And Maintenance Instructions

The inlet pipe must be laid as straight as possible and aat a
gradient to the KESSEL lifting station in accordance with EN
12056.
Inlets connected too low on the tank could result in blocka-
ges of the inlet pipe (please see the 'Important' section on
page 10). Connection to the tank can be carried out as de-
scribed under section I or II above.
The ventilation pipe equalized the air pressure inside the lif-
ting station which occurs during filling or pumping out of the
pump body. According to DIN 1986 the ventilation pipe must
have as least the DN 70 size and be connected directly
through the roof of the building to ambient air, which will pre-
vent nuisance odours. Connecting the ventilation pipe to the
lifting station body can be handled as described in the pre-
vious section 4.2 (Connection of drainage pipes).
The pressure pipe for pumping out collected wastewater into
the adjoining sewer should be connected directly to the out-
let pressure pipe.
To reduce noise and force transfer into the pressure pipe the
supplied rubber pressure connection coupling must be used.
It should be fitted at least 4 cm over the outlet spigot of the
lifting station and be secured with a stainless steel pipe
clamp. The supplied rubber pressure connection does not
offer any type of lateral force connection which must be
handled on-site, for example with pipe connection clamps
secured to the wall or ceiling.
According to the regulations of EN 12056, the pressure pipe
must be routed above the backwater level and connected to
a ventilated drainage pipe to the sewer. A gate closure valve
should be connected on-site to the pressure pipe.
The pressure pipe must be connected (see above) in such a
way that no forces are transferred to the system and there is
no direct contact with the building (structure-borne noise). No
other drainage pipes or fixtures may be connected to the
pressure pipe.
Air-tightness and material strength must be guaranteed
under pressure load. This must be checked during commis-
sioning of the system.
Non-return flaps installed in the pressure outlet pipe are
available as accessories.
DN 80 cast iron non-return flap (Article # 206-199)
DN 100 cast iron non-return flap (Article # 206-198)
Ventilation system (Article # 206-200)
4. Installation and assembly
47

4.3 Level sensor / control

Prior to any work taking place on the control unit, pump
CAUTION:
or pressure switch, the main power supply to the system
must be disconnected and secured against accidental ac-
tivation.
This system is equipped with a wastewater pump. Two wa-
stewater levels are monitored to control the system (ON and
ALARM levels). The pressure / level sensor is installed and
pre-set at the factory. The pump activation (ON) level is set
for a wastewater level of 160 mm, the alarm activation
(ALARM) level is set for a wastewater level of 200 mm. The
levels can be changed by re-setting the control unit if custom
ON or ALARM levels are required. However, it is important
that the ALARM level is not set too low to prevent unneces-
sary alarm signals as well as the ON level should not be set
too high to prevent wastewater back-up into the inlet pipes
as well as too frequent pump activation (for pumps manu-
factured on June, 2009 or earlier).
The ON pump activation level can be adjusted using screw
4.3.1 Custom setting of level sensor
1 and the ALARM activation level can be adjusted using
screw 2 as seen on the diagram. Turning the adjustment
screw in the clockwise direction increases the activation
level, turning in the counter clockwise direction lowers the
activation level. Turning a screw half was around will ad-
just change the activation level by 10 mm.
1
The transparent air hose must be laid with a continuous up-
4.3.2 2 Level sensors (for Jan 2010 an on)
ward slope to the control unit so that no condensation liquid
can build up in the hose. Make sure that the hose is not loo-
ped or coiled up. If the air hose is too long it can be shorte-
ned on-site. The air house can be extended to a maximum
length of 20 meters. The activation levels have be set at the
factory and can be changed by control unit adjustments. Ad-
ditional information is available from the KESSEL customer
service department.
2
until model year 12/2009