OSF NR-12-TRS-2 User manual

Installation and operating manual
Water level control for overflow collecting tank
Art. No. 3030000020 (without solenoid valve)
Function:
The NR-12-TRS-2 collection reservoir control system is a technically high-quality product which can only
correctly fulfil its function if it has been connected and assembled in accordance with the instructions and if this
operating manual is followed. The NR-12-TRS-2 is particularly suitable for use in swimming pools with
overflow channels. It is constructed with integrated circuitry and consists of:
electronic controller
submerged electrodes (option)
The submerged electrodes do not cause any electrolyte formation in the water because they are operated with
alternating current. The electrode cables can be extended up to 20 m (min. 1.5mm2) without requiring electronics
balancing. The electronic circuitry has been specially developed for overflow collection reservoirs. Wave
movements do not cause direct switching processes due to special circuitry in order to avoid switching cycles
which may be too short.
The submerged electrodes are operated using non-hazardous safety low voltage. The controller itself has been
designed to comply with the currently applicable German VDE and CE regulations.
Specifications:
Control system:
Dimensions:
220mm x 219mm x 100mm
Operational voltage:
230V/50Hz
Control system power consumption:
ca. 7VA
Switching capacity:
max. 1.1kW (AC3)*
Protection class:
IP 40
Submerged electrodes:
Dimensions:
ø24mm x 134mm
Cable length:
3m
Operational voltage:
12V
*See also connection plan.
Installation:
The controller must be installed in accordance with its protection class. Before opening the housing, the
device must be switched voltage-free using a multi-pole main switch with a contact opening distance of
at least 3 mm. This main switch must be integrated in the on-site installation. It is imperative that you
observe the throughflow direction (arrow direction) indicated on the solenoid valve.
Use in open-air pools:
Depending on the swimming pool design, it is possible that rainwater raises the water level in open-air pools and
activates the "forced switching" function. If this operating behaviour is not required, "forced switching ON"
(terminal 8) can be disconnected.

Operating manual NR-12-TRS-2 Page: 2
Installing the submerged electrodes:
submerged electrodes are supplied as series with waterproof and ozone-proof special cables. The tensile
strength of the cable is sufficient for hanging the electrodes from the special cable in the overflow collection
reservoir, and it is also possible for individual electrodes to touch each other. Fixing takes place above the
reservoir. Fixing should be made with the aid of strain-relief clamps, cable clamps, cable binders or similar
elements in accordance with the relevant local conditions. The special cables are connected in a distribution box
to be installed on site. A cable (e.g. NYM-0 5x1.5mm2) is then routed from the distribution box to the control
system. The submerged electrodes are not suitable for saline baths.
Ground
Individual submerged electrode functions
Forced switching ON
Double function:
solenoid valve CLOSED
forced switching OFF
Double function:
solenoid valve ON
forced switching OPEN
Dry run protection: pump OFF
In normal operation, the water
level varies between the
"solenoid valve CLOSED" and
"solenoid valve OPEN".
The height difference is
dependent on individual
conditions. A minimum of 5 cm
should be ensured to achieve
sufficient sensing distance.
Electrical power supply:
The electrical power supply may only be installed by an approved specialist electrician. The following
wiring diagram and the relevant applicable safety regulations must be observed. The electrical
equipment must include a residual current circuit breaker with IFN=30mA on site.
Application examples:
These 3 application
examples clarify
combinations using the
Pool-Control-Plus
(PCP) filter control, a
PC-230-ES or PC-400-ES
filter control and any other
control system.
The NR-12-TRS-2
collection reservoir control
system can also be directly
combined with other
devices, e.g. backflushing
and solar control systems.
Appropriate wiring
diagrams are included with
the control systems.
Mains
Solenoid valve
230V
Forced switching
Max. level
Min. level
Dry run protection
Ground
Solenoid valve
230V
Mains
Forced switching
Max. level
Min. level
Dry run protection
Ground

Operating manual NR-12-TRS-2 Page: 3
Relay K2 switches the filter
pump on once the water
level reaches the top
electrode.
Relay K3 switches the
pump off once the water
level falls below the "dry
operation protection"
electrode.
Connecting the submerged electrodes:
When connecting the submerged electrodes you must ensure that the sequence is not mixed up,
because mixing up the electrodes always leads to failures in the installation.
If the "forced switching" function is not required, the corresponding submerged electrode (terminal 8)
can be omitted. Terminal 8 then remains unused. It does not require bypassing.
All other submerged electrodes are necessary for control system function and may not be omitted or
bypassed.
Functional information:
The NR-12-TRS-2 collection reservoir control system has the following functions:
a) Water level regulation.
Once the water level falls below the "solenoid valve OPEN" submerged electrode due to water
losses in the swimming pool, e.g. due to evaporation or backflushing, the solenoid valves opens
and the fresh water flowing in raises the water level. As soon as the rising water level reaches
the "solenoid valve CLOSE" (terminal 5) submerged electrodes position and contacts the
electrodes, the solenoid valve closes freshwater inflow off.
b) Filter pump dry run protection.
If the water level sinks to below the "dry run protection pump OFF" submerged electrode due to
water losses in the collection reservoir, e.g. due to backflushing, the collection reservoir control
system switches the filter pump off so that it is not damaged by dry running. As soon as the
water level rises to the height of the "dry run protection pump ON" (terminal 6) and contacts the
electrode, the collection reservoir control system switches the filter control system on
again automatically.
c) Forced switching.
If the water level rises in the collection reservoir due to water displacement in the swimming pool
and contacts the "forced switching ON" submerged electrode (terminal 8), the NR-12-TRS-
2 collection reservoir control system switches the filter pump on automatically (in connection with
an filter control system). Now the water is pumped back into the swimming pool to prevent
unnecessary loss of valuable water. The "forced switching ON" submerged electrode must be
located a few centimetres deeper than the overflow.
An electroless closed solenoid valve must be used.
A complete function test must be carried out once installation and assembly work has been completed.
Mains
Solenoid valve
230V
Forced switching
Max. level
Min. level
Dry run protection
Ground
Forced switching
Error messaging
Dry run protection

Operating manual NR-12-TRS-2 Page: 4
Device setting facilities:
The control system includes 4 DIP switches and 2 trimmers which can be used to set additional control
system functions.
DIP switch functions:
DIP 1:
OFF
The solenoid valve works without time limitations.
Solenoid valve time
limitation
ON
The solenoid valve on duration is limited to the time with which trimmer
1 is set (0.5….60 minutes). If the maximum operating level has not
been achieved within this period, the solenoid valve (K1) is switched off
and the collective error messaging system (K4) is activated if
necessary (see DIP 4).
DIP 2
OFF
Dry run protection works without time limitation. When the water level
sinks below the "dry run protection" electrode, the pump (K3) is
switched off. It is only switched on again once the water level has
reached minimum operating level.
Dry run protection
time limitation
ON
Dry run protection works with without time limitation. When the water
level sinks below the "dry run protection" electrode, the pump (K3) is
switched off. It is switched on again once the "dry run protection"
electrode has been immersed in water for 60 seconds, or if the water
level has reached the minimum operating level.
Trimmer 1
Time limitation
Solenoid valve
Trimmer 2
Time limitation
Forced switching
DIP switch

Operating manual NR-12-TRS-2 Page: 5
DIP 3:
OFF
Forced switching works without time limitation. When the water level
reaches the "forced switching" electrode, the pump (K2) is switched on.
It is only switched on again once the water level has sunk below the
maximum operating level.
Forced switching time
limitation
ON
Forced switching works with without time limitation. When the water
level reaches the "forced switching" electrode, the pump (K2) is
switched on. It is only switched on again once the water level has sunk
below the maximum operating level. If this level has not been achieved
within the time set using trimmer 2 (0.5 ... 60 minutes) the pump is
switched off and the error message (K4) is switched on.
DIP 4:
Group error message
OFF
Relay K4 is used for group error messaging. It is switched on if:
the dry run protection activates
the solenoid valve time limitation activates (see DIP 2)
the forced switching time limitation activates (see DIP 3)
inadmissible measured values are detected in the electrodes
(e.g. "forced switching" electrodes in water and "dry run
protection" electrodes not in water - electrodes mixed up).
ON
Relay K4 is switched on if the forced switching is switched on for
longer than the period set using trimmer 2 (0.5 ... 60 minutes). This
can be used to trigger backflushing using K4 in connection with the
EUROTRONIK 10 pressure switch input in order to remove
excess water from the system.

Operating manual NR-12-TRS-2 Page: 6
Service terminal:
There is a connecting plug inside the control unit which can be used to connect the service
terminal.
The service terminal is used to display the level regulation operating status clearly in order to help in
possible troubleshooting. Caution! The service terminal may only be plugged in or unplugged
when the control system is switched off!
Zwg
Max
Min
TRS
MV:
TRS:
Zwg.
K4:
360s
OFF
600s
Samm.
Forced switching
Maximum operating level
Minimum operating level
Dry run protection
Water level display
Solenoid valve time limitation
Dry run protection time limitation
Forced switching time limitation
Use of contact K4
(group error messaging or backflushing start)
Socket for service
terminal

Operating manual NR-12-TRS-2 Page: 7
Installation instructions solenoid valve
The piping system must be cleaned before the valve installation, because dirt will
malfunction.
If necessary, a strainer should be mounted in front of the valve inlet.
Mechanically clamping the valve housing, for example for non-aligned pipes or
improper sealing material is to be avoided.
Use only suitable tools.
Do not use the solenoid coil during mounting as a lever arm.
During installation, the flow direction must be observed! The brass body is
labeled near the thread with IN and OUT. The valve closes tightly only in the
specified direction of flow. In the opposite direction, the solenoid valve may be
damaged.
The preferred installation location is " solenoid vertical on top ". In this position, the
wear and contamination risk is lowest.
Electrical connection
The electrical connection may only be carried out by an authorised electrician taking
into account the applicable regulations. The protective earth connection is essential.
The junction box may be inserted or removed only when the power is off. AC
solenoids are destroyed when operating without armature.
Maintenance
Maintenance work must be performed by an expert only when the pipework is
pressure-free and the magnet is voltage-free.
Trouble shooting
If the valve does not open or close, the control bores and the armature must be
cleaned.
We wish you a lot of fun and relaxation in your swimming pool.
Subject to alterations!
Mai 2018

Operating manual NR-12-TRS-2 Page: 8