Installation Manual
LTU 101 Digital
Product description
2. Check that there is no damage inside the enclosure
around the M20 hole.
The LTU 101 Digital is a high level module suited for the
FGC-range of pump controllers. The LTU 101 Digital is
used together with the open bell system. The output is a
digital signal indicating whether or not there is a high level
in the pump sump.
The area around the M20 hole must be free from
damages within 2 mm from the edge of the hole.
Module parts
The parts of the module are shown below.
6
1
Figure 3. M20 hole
The figures exemplifies the mounting using
one M20 hole. You can use another M20 hole
to install the LTU 101 Digital, for example if
you prefer to install any analogue level sensor
in the right-most M20 hole.
2
3
Mount the sensor house
4
1. Place the sensor house in the M20 hole.
5
Figure 1. Module parts
No.
1
3
5
Part
Sensor house
Lock screw
Decrement
No.
2
4
6
Part
Sensor nut
Conduit entry
O-ring
Figure 4. Mounted sensor house
Mount the module
2. Check that the O-ring is fitted correctly into the notch.
3. Is the hose in the sensor element fitted tightly?
(It must not be loose.)
The assembly instruction is exemplified with the
mounting of an LTU 101 Digital in an M20 hole in an FGC
300 small enclosure.
– If Yes, continue by mounting the sensor nut.
– If No, fit the hose tightly onto the most central of
the two pipes in the sensor element.
If the open bell is mounted in an ATEX zone,
it is extra important to follow the instructions.
The LTU 101 Digital can never be mounted in
an ATEX zone.
Mount the sensor nut
1. Fit the sensor nut manually, turn the nut until it starts
to tighten, and then turn it an additional half turn.
Inspect the module
2. Make sure that:
1. Check that neither the sensors face of sealing joint,
nor the O-ring is damaged.
– Lock screw can be fitted.
– Sensor house is secured tightly to inside of the
enclosure.
Figure 2. Sealing joint and notch with O-ring
2
FGC 200
3. Fit and tighten the lock screw.
Connect the wires from the module as follows:
•
Red wire to terminal 14.
•
Yellow wire to terminal 17.
•
Black wire to terminal 18.
4-20mA
10
Figure 5. Mounted sensor nut
Mount the decrement
11
12
13
14
15
16
17
18
19
20
Red
Yellow
Black
1. Mount the decrement.
2. Check that the decrement is fitted tightly.
Figure 8. Connection diagram for an FGC 200
Technical data
Denomination and standards
Part no.
40 501556
ATEX
Yes
Power supply and environment
Supply voltage:
Figure 6. Mounted decrement
Operating temperature:
Connect the module
Input and output
The connection differs between an FGC 300 and an FGC
200.
Detection level:
Digital output:
Temperature drift:
FGC 300
18-25 VDC
-20°C to +50°C
High level signal
4±1 cm
±5% below -10°C
Material
There are two connection alternatives for an FGC 300.
Connect the wires as follows:
Material:
Enclosure:
IP54
•
Red wire to terminal 25.
Weight:
50 g
•
Yellow wire to terminal 27.
Dimensions:
•
Black wire to terminal 28 or 30.
Mounting:
PVC and Epoxy
Ø 38x41
M20 cable entry
Cable data
24 VDC
Max 10W
22
23
24
25
26
27
28
29
Cable length:
4-20 mA
30
31
Max length air tube:
32
Red
Yellow
Black
Figure 7. One of the connection alternatives for FGC 300
3
0,30 m
20 m (Open Bell System)
ITT Water & Wastewater AB
Box 2058
291 02 Kristianstad
Sweden
Visiting address:
Industrigatan 50
291 36 Kristianstad
Sweden
4
Tel +46-44-20 59 00
Fax +46-44-20 59 01
897807_01_EN_GB_INST_LTU101.pdf © ITT Water & Wastewater AB This document can be changed without any prior notice.
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