20
In case of a fault the contact is closed between terminals 6 and 7
and terminals 9 and 10 respectively.
Terminals 12 to 14 :
Terminals 12, 13 and 14 are used for the max. water level alarm
(potential-free).
In case of an alarm the contact is closed (between terminals 12 and
13).
Terminals 3, 4 and 5 are active with any kind of fault, i.e. also in case
of a max. water level alarm.
If the interval alarm is activated via software, these alarm outputs are
operated, so that the blinking light can be replaced by a less expen-
sive indicator light.
Terminals 17 to 24 (float switches) :
Float switches can be connected to terminals 17 to 24.
The display shows which switch is closed.
The contact of the float switch must be closed when the level is rea-
ched or exceeded. When the float switches are used in explosive
areas, isolating switch amplifiers must be provided.
Terminals 17 and 18
Pump base load / Pump peak load OFF
Terminals 19 and 20
Pump base load ON
Terminals 21 and 22
Pump peak load ON
Terminals 23 and 24
max. water level
Terminals 18, 20, 22, 24 are interconnected, so that also a common
conductor can be used.
Terminals 25 and 26 :
An external sensor (0-1 mCW) with an output signal of 4-20mA in two-
wire technique can be connected to terminals 25 (+) (brown) and 26
(-) (green). The sensor is supplied with a stabilised DC voltage of
approx. 14V. Make sure to check the polarity. When the sensor is used
in explosive areas, a safety barrier must be provided.
When using and setting the pneumatic or electronic level sensor, a
float switch can be connected to the terminals for the max. water
level alarm (terminals 23 and 24) for added safety. Upon activation of
the float switch, both pump are forced to operate and the condition
is indicated via the alarm contact (terminals 12, 13 and 14). As soon
as the value has dropped below the alarm level the peak load pump
is switched off. The base load pump can be switched off with a delay
via a set run-down time.
6. STARTING-UP
- We recommend that you ask your SALMSON Customer Service to
commission your unit.
- Connecting the unit to the mains.
- Coarse level setting.
- Performing settings (motor current, run-down time etc.).
- Functional check and start-up.
- Note that connection of the mini-compressor will result in increased
levels.
7. MAINTENANCE
The system must be switched off for all maintenance and
repair work and secured against unauthorised operation.
The YN3000 switchgear is virtually maintenance-free. In order to ensure
optimum operating safety at minimum operating costs, we recom-
mend that you complete the following checks every 6 months :
- When an external level sensor or float switch is used, it should be
checked and possibly cleaned depending on the degree of
contamination.
ENGLISH
Summary of Contents for YN3000 Series
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