Spirax Sarco LC2250 User manual

IM-P402-130 EMM Issue 9
Commissioning password
Current legislation states that in order to prevent tampering and potentially hazardous
programming errors, access to the pass codes required to enter commissioning mode
should only be available to qualified and trained personnel.
Enter commissioning
To enter the commissioning mode, press and hold the OK button for 5 seconds.
The display will show the pass code '888'. Enter the pass code '745'. This is fixed and cannot
be changed.
If an incorrect pass code is entered, the display will return to showing the current valve / pump
status – run mode.
If the correct pass code is entered, the display will show the main menu structure. Select
'End' to leave the menu.
Once in the commissioning mode press the button:
- to scroll through the menus.
- to increase digits when in a menu.
Press the OK button to enter a menu choice (select a parameter or digit) and shift right, onto
the next digit.
This page MUST be removed after
commissioning and kept in a safe,
access controlled location.
© Copyright 2017
Printed in GB
IM-P402-130
EMM Issue 9
4025251/9
LC2250
Level Controller
Installation and Maintenance Instructions
1. Safety information
2. User instructions and
delivery information
3. System overview
4. Mechanical installation
5. Electrical installation
6. Commissioning
- Quick set-up
- Full
7. Communications
8. Maintenance
9. Fault nding
10. Technical information
- Default settings
11. Appendix
- Data registers
12. Menu map
LC2250
%
OK
AL

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1. Safety information
Safe operation of this product can only be guaranteed if it is properly installed,
commissioned, used and maintained by qualified personnel (see Section 1.11) in
compliance with the operating instructions. General installation and safety
instructions for pipeline and plant construction, as well as the proper use of tools
and safety equipment must also be complied with.
Your attention is drawn to IEE Regulations (BS 7671, EN 12953, EN 12952 and
EN 50156). Elsewhere, other regulations will normally apply.
All wiring materials and methods shall comply with relevant EN and IEC standards
where applicable.
Warning
This product is designed and constructed to withstand the forces encountered during
normal use. Use of the product other than as a boiler controller, or failure to install
the product in accordance with these Instructions, product modifications or repair
could:
-Cause injury or fatality to personnel.
-Cause damage to the product / property.
-Invalidate the marking.
These instructions must be stored in a safe place near the product installation at all
times.
Warning
This product complies with Electromagnetic Compatibility Directive 2014/30/EU and
all its requirements.
This product is suitable for Class A Environments (e.g. industrial). A fully detailed
EMC assessment has been made and has the reference number:
-UK Supply BH LC2250 2012.
The product may be exposed to interference above the limits of heavy Industrial
Immunity if:
-The product or its wiring is located near a radio transmitter.
-Excessive electrical noise occurs on the mains supply. Power line protectors (ac)
should be installed if mains supply noise is likely. Protectors can combine
filtering, suppression, surge and spike arrestors.
-Cellular telephones and mobile radios may cause interference if used within
approximately 1 metre (39") of the product or its wiring. The actual separation
distance necessary will vary according to the surroundings of the installation
and the power of the transmitter.
This product complies with Low Voltage Directive 2014/35/EU by meeting the
standards of:
-EN 61010-1:2010 Safety requirements for electrical equipment for measurement,
control, and laboratory use.
This product has been type tested as a level control by meeting the standard:
-VdTÜV requirements for water level control and limiting devices, water level
100 (2010).
IM-P402-130 EMM Issue 9

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Static precautions (ESD)
Static precautions must be observed at all times to avoid damage to the product.
Level control and level limiting products in steam boilers
Products /systems must be selected, installed, operated, and tested in accordance
with:
-Local or National standards and regulations.
-Guidance Notes, (Health and Safety Executive BG01 and INDG436 in GB).
-The requirements of Approvals Authorities.
-Boiler Inspection Bodies.
-Boiler manufacturer’s specifications.
Two independent low water limiting systems must be installed on steam boilers.
Level probes must be installed in separate protection tubes /chambers, with sufficient
clearance between the tips, and earth.
Each probe must be connected to an independent controller. The alarm relays must
isolate the boiler heat supply at low alarm status.
A high water alarm may be part of the water level control, or a separate system.
An independent high water alarm system must be fitted if it is considered a safety
requirement.
In this case, the relays must simultaneously isolate the feedwater supply and the
boiler heat supply at high alarm status. All boiler water limiters require regular
functional testing.
The level probe and controller is only part of the safety system. To complete the
system, additional circuitry (wiring, relays, alarm bell / lamp etc.) is required.
A suitable water treatment regime must be used to ensure continuous safe and
correct operation of the control and limiter systems. Consult the above authorities
and a competent water treatment company.

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Symbols
Equipment protected throughout by double insulation or reinforced
insulation.
Functional earth (ground) terminal, to enable the product to function
correctly.
Not used to provide electrical safety.
Clean earth / ground.
Safety earth.
Caution, risk of electric shock.
Caution, risk of danger, refer to accompanying documentation.
Optically isolated current source or sink.
Caution, Electrostatic Discharge (ESD) sensitive circuit. Do not touch
or handle without proper electrostatic discharge precautions.
ac, alternating current.

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1.1 Intended use
i) Check that the product is suitable for use with the intended fluid.
ii) Check material suitability, pressure and temperature and their maximum and
minimum values. If the maximum operating limits of the product are lower than
those of the system in which it is being fitted, or if malfunction of the product
could result in a dangerous overpressure or overtemperature occurrence, ensure
a safety device is included in the system to prevent such over-limit situations.
iii) Determine the correct installation situation and direction of fluid flow.
iv) Spirax Sarco products are not intended to withstand external stresses that may
be induced by any system to which they are fitted. It is the responsibility of the
installer to consider these stresses and take adequate precautions to minimise
them.
v) Remove protection covers from all connections and protective film from all name-
plates, where appropriate, before installation on steam or other high temperature
applications.
1.2 Access
Ensure safe access and if necessary a safe working platform (suitably guarded)
before attempting to work on the product. Arrange suitable lifting gear if required.
1.3 Lighting
Ensure adequate lighting, particularly where detailed or intricate work is required.
1.4 Hazardous liquids or gases in the pipeline
Consider what is in the pipeline or what may have been in the pipeline at some
previous time. Consider: flammable materials, substances hazardous to health,
extremes of temperature.
1.5 Hazardous environment around the product
Consider: explosion risk areas, lack of oxygen (e.g. tanks, pits), dangerous gases,
extremes of temperature, hot surfaces, fire hazard (e.g. during welding), excessive
noise, moving machinery.
1.6 The system
Consider the effect on the complete system of the work proposed. Will any proposed
action (e.g. closing isolation valves, electrical isolation) put any other part of the
system or any personnel at risk?
Dangers might include isolation of vents or protective devices or the rendering
ineffective of controls or alarms. Ensure isolation valves are turned on and off in a
gradual way to avoid system shocks.

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1.7 Pressure systems
Ensure that any pressure is isolated and safely vented to atmospheric pressure.
Consider double isolation (double block and bleed) and the locking or labelling of
closed valves. Do not assume that the system has depressurised even when the
pressure gauge indicates zero.
1.8 Temperature
Allow time for temperature to normalise after isolation to avoid danger of burns.
1.9 Tools and consumables
Before starting work ensure that you have suitable tools and / or consumables
available. Use only genuine Spirax Sarco replacement parts.
1.10 Protective clothing
Consider whether you and / or others in the vicinity require any protective clothing
to protect against the hazards of, for example, chemicals, high /low temperature,
radiation, noise, falling objects, and dangers to eyes and face.
1.11 Permits to work
All work must be carried out or be supervised by a suitably competent person.
Installation and operating personnel should be trained in the correct use of the
product according to the Installation and Maintenance Instructions.
Where a formal 'permit to work' system is in force it must be complied with. Where
there is no such system, it is recommended that a responsible person should know
what work is going on and, where necessary, arrange to have an assistant whose
primary responsibility is safety.
Post 'warning notices' if necessary.
1.12 Handling
Manual handling of large and / or heavy products may present a risk of injury. Lifting,
pushing, pulling, carrying or supporting a load by bodily force can cause injury
particularly to the back. You are advised to assess the risks taking into account the
task, the individual, the load and the working environment and use the appropriate
handling method depending on the circumstances of the work being done.
1.13 Residual hazards
In normal use the external surface of the product may be very hot.
Many products are not self-draining. Take due care when dismantling or removing
the product from an installation.
1.14 Freezing
Provision must be made to protect products which are not self-draining against
frost damage in environments where they may be exposed to temperatures below
freezing point.

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1.15 Disposal
On disposal of the unit or component, appropriate precautions should be taken in
accordance with Local/National regulations.
Unless otherwise stated in the Installation and Maintenance Instructions this product
is recyclable and no ecological hazard is anticipated with its disposal providing due
care is taken.
1.16 Returning products
Customers and stockists are reminded that under EC Health, Safety and Environment
Law, when returning products to Spirax Sarco they must provide information on any
hazards and the precautions to be taken due to contamination residues or mechanical
damage which may present a health, safety or environmental risk. This information
must be provided in writing including Health and Safety data sheets relating to any
substances identified as hazardous or potentially hazardous.

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Certain computer programs contained in this product were developed by
Spirax-Sarco Limited ("the Work(s)").
Copyright © Spirax-Sarco Limited 2017
All rights reserved
Spirax-Sarco Limited grants the legal user of this product (or device) the right to
use the Work(s) solely within the scope of the legitimate operation of the product
(or device). No other right is granted under this licence.
In particular and without prejudice to the generality of the foregoing, the Work(s)
may not be used, sold, licensed, transferred, copied or reproduced in whole or in
part or in any manner or form other than as expressly granted here without the prior
written consent of Spirax-Sarco Limited.
2.1 General description
The LC2250 is a level controller for conductive liquids. It has two alarms that can be configured
high or low.
WARNING: The minimum conductivity when used with the LP20 / PA20 or PA420.
2.2 Front panel
The front panel has a 3-digit LCD and a five-button keypad.
2. User instructions and delivery
information
Fig. 1
Front panel keypad and definitions
Test the alarms
Scroll up the menu
Clear any
latched
alarms or
errors
(5 Seconds)
LCD display
LC2250
%
OK
AL

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2.3 Using the buttons
Use the button to:
- scroll through the menus.
The OK button is used to:
- enter the commissioning mode (press and hold for five seconds).
- enter the alarm reset passcode.
The AL button is used to:
- test the alarm relays.
- test the external circuits.
2.4 LCD display
The LCD display shows what the system is doing.
It indicates whether:
- an alarm condition is present.
- the pump is operating (on / off control).
- the valve is moving (proportional control).
Moving segments show whether the water is rising or falling. A single static segment indicates
the water input / steam output is in equilibrium.

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Alarm
ALarm. This warns of a level alarm condition.
Level alarm if occuring or has been latched.
Testing the alarm relays and circuit. To do this press the
'AL' button, either in run or commissioning mode.
Note: In commissioning mode only AL is displayed.
The level signal is out of range (OOr).
On / off control
Water level rising – pumping in.
Pumping in mode, pump on - vessel filling.
The moving segment display shows that the
level is rising.
Water level falling – pumping out
Pumping out mode, pump on ~ vessel draining.
The moving segment display shows that the
level is falling.
Pump off
Water level between pump on / pump off positions.
Segment does not move.
Proportional control
Valve opening.
The moving segment display shows that
the valve is opening, causing the amount of
water entering the boiler / tank to increase.
Valve closing.
The moving segment display shows that
the valve is closing, causing the amount of
water entering the boiler / tank to decrease.
Valve stationary – Water input / steam output in equilibrium.
Segment does not move.
or
and
and

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2.5 View parameter mode
Press the button in run mode to view the current level as a percentage of the gauge glass.
The display remains in view for 2 minutes to give time to record it if required. Reference
Section 6.4, Figure 11.
Press the button again to step through the parameters selected. Each parameter will
remain on view for a further 2 minutes unless the button is pressed again.
2.6 Alarm / error display messages
If an error occurs, an error menu 'ErX' will be displayed at the end of the parameter screens.
Pressing and holding the OK button for 3 seconds can clear a message and re-energize the
alarm relay(s). If the cause has not been corrected, the same error message will reappear.
If the error or alarm is of a latching type, only the message will disappear. The alarm relay
will remain de-energised until cleared by the operator. This is achieved by holding the ' OK '
button for 5 seconds and entering the alarm reset code '325' or by entering the correct
passcode for the commissioning menu. If more than one error or alarm has occurred, the
next message will appear (in priority order) after the previous one has
been cleared. See Section 9 - Fault finding.
2.7 Equipment delivery, handling and storage
Factory shipment
The product is tested, calibrated and inspected prior to shipment, to ensure reliable operation.
Receipt of shipment
Each carton should be inspected at the time of delivery for possible external damage. Any
visible damage should be recorded immediately on the carrier's copy of the delivery slip.
Each carton should be unpacked carefully and its contents checked for damage. If it is found
that some items have been damaged or are missing, notify Spirax Sarco immediately and
provide full details. In addition, damage must be reported to the carrier with a request for
their on-site inspection of the damaged item and its shipping carton.
Storage
If the product is to be stored for a period prior to installation, the environmental storage
conditions should be at a temperature between 0 °C and 65 °C (32°F and 149°F), and between
10% and 90% relative humidity (non-condensing).
Before installing and connecting the power ensure there is no condensation within the unit.
Operator instructions
An alternative operator instruction manual, in place of this manual, for operating the equipment
is required. This will avoid the commissioning menu passcode being disclosed to the operator.
The alarm reset passcode may optionally be disclosed if this is deemed necessary.

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3. System overview
3.1 Function
The product can be configured to control the level of a boiler, tank or vessel, by operating a
pump, valve or solenoid. Typical applications:-
On / off control:
-Pump control.
-Two alarm outputs.
-4 - 20 mA level retransmission output (isolated).
Note: A solenoid valve may be used instead of a pump.
Modulating control:
Modulating valve control using a valve motor drive or 4 - 20 mA control signals.
-Two alarm outputs.
-4 - 20 mA level retransmission output (isolated).
Note: The 4 - 20 mA level output is only available when the product is configured for
valve motor drive systems.
3.2 Inputs
The product has two inputs to accept the following signals:
-Level probe or transmitter 1 - 6 V or 4 - 20 mA.
Note: The level probe must be long enough to sense over the complete level range.
-A 1 K potentiometer input ~ for Valve Motor Drive (VMD).
3.3 Outputs
The output control signal can be configured /wired to work with a pump or a modulating
control valve. It also provides relay outputs for high or low level alarms and can provide an
isolated 4 - 20 mA retransmission output.
3.4 Other features
An additional filter can be selected to increase the damping effect for turbulent conditions.
To prevent unwanted or inadvertent changes being made, all commissioning parameters are
protected with a pass code.
The product can communicate via an infrared link between adjacent boiler house controllers
(Spirax Sarco products only). It is designated as a slave unit only - see Section 7 -
Communications.

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Note: Read the 'Safety information' in Section 1 before installing the product.
The product must be installed in a suitable industrial control panel or fireproof enclosure
to provide impact and environmental protection. A minimum of IP54 (EN 60529) or Type 3,
3S, 4, 4X, 6, 6P and 13 (UL50/NEMA 250) is required. If installed in a harsh environment
(conductive dust and / or wet conditions), extra protection is required.
During installation or maintenance, the rear of the product must be protected from
environmental pollutants entering the product. Alternatively, the tasks can be performed in
a dry clean environment.
Caution 1: The product must only be installed in the vertical orientation.
Caution 2: Do not cover or obstruct the infrared beam between products.
Ensure that the display can be easily read by the operator.
Warning: The boiler control panel or enclosure doors must be kept closed at all
times unless installation or maintenance work is being carried out.
4.1 Environmental conditions
Install the product in an environment that minimises the effects of heat, vibration, shock and
electrical interference (see Section 1 -'Safety information').
Do not install the product outdoors without additional weather protection.
Do not attempt to open the product -it is sealed and has no replaceable parts or
internal switches.
4.2 Installation on a DIN rail
The product is provided with a clip and a set of self-tapping screws to secure it to a 35 mm DIN
rail. On the rear of the enclosure, two sets of holes are provided to give two height positions.
The clip can be adjusted to give further positions. Locate the clip onto one set of holes and
secure it using the two screws provided. Ensure the spring clip is fully engaged with the rail.
Warning: Only use the screws provided with the product.
4. Mechanical installation

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Fixing template cutout notes:
- Solid line indicates cutout required for panel mounting.
- Broken line indicates product outline.
- A minimum gap of 15 mm between units must be provided for product cooling.
- Mounting hole dimensions are the same for both panel and wall mounting.
4.3 Installation on a chassis plate:
- Drill holes in chassis plate as shown in Figure 2.
- Fit unit to chassis plate and secure with 2 screws, nuts and washers, using the slots
provided at the top and bottom of the case.
Warning: Do not drill the product case or use self-tapping screws.
4.4 Installation in a panel cutout:
(Minimum panel thickness 1 mm if the bezel is used).
- The product has integral threaded inserts (M4 x 0.7) at the top and bottom of the front
panel.
- Two M4 x 25 mm screws are provided, together with fibre washers and a bezel.
Warning:
Do not use screws over 25 mm in length -danger of electric shock.
- Cut the panel to the dimensions given in Figure 2. Drill the screw holes in the panel in
the positions indicated.
- Remove the backing from the gasket supplied and apply to front face of the product.
- The bezel can be used to enhance the appearance of the panel cutout. If required, fit
this to the outside of the panel.
- Fit the unit from the rear of the panel, and secure using the screws, washers (and bezel)
provided.
- Tighten the M4 screws to 1.0 - 1.2 Nm.
Warning: Do not drill the product case or use self-tapping screws.

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Ø 4.2 mm
10 mm
22
mm
Fig. 2
Chassis plate / panel -
cutout diagram
112 mm
67 mm
10 mm
45 mm
92 mm 22.5
mm
Ø 4.2 mm
15
mm
Ø 4.2 mm
Ø 4.2 mm
120 mm
8 mm 112 mm
120 mm

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Note: Before installing read the 'Safety Information' in Section 1.
Warning:
Isolate the mains supply before touching any of the wiring terminals as
these may be wired to hazardous voltages.
Use only the connectors supplied with the product, or spares obtained
from Spirax-Sarco Limited. Use of different connectors may compromise
product safety and approvals. Ensure there is no condensation within the
unit before installing and connecting the power.
Connecting the mains supply incorrectly can cause damage and may
compromise safety.
5.1 General wiring notes
Every effort has been made during the design of the product to ensure the safety of the user
but the following precautions must be observed:
1. Maintenance personnel must be suitably qualified to work with equipment having
hazardous live voltages.
2. Ensure correct installation. Safety may be compromised if the installation of the product
is not carried out as specified in this IMI.
3. The design of the product relies on the building installation for overcurrent protection
and primary isolation.
4. Overcurrent protection devices rated at 3 amps must be included in all phase conductors
of the installation wiring. If overcurrent protection is included in both supply wires then the
operation of one must also cause the operation of the other. Refer to IEC 60364 (Electrical
Installations of Buildings) or National or Local standards for full details of requirements
for overcurrent protection.
5. A 3 A quick-blow overcurrent protection device must be fitted to the relay circuit(s).
6. Relay contacts must be supplied on the same phase as the mains supply.
7. The product is designed as an installation category III product.
8. Install wiring in accordance with:
- IEC 60364 - Low-voltage electrical installations.
-EN 50156 Electrical Equipment for furnaces and ancillary equipment.
-BS 6739 - Instrumentation in Process Control Systems: Installation design and
practice or local equivalent.
-National and Local Electrical Code (NEC) or Canadian code (CEC) for the US and
Canadian markets. Note; use NEC Class 1 wire with a temperature rating greater than
75 °C. If the cable is to be exposed to a higher temperature, then a higher temperature
rating needs to be selected.
9. It is important that the cable screens are connected as shown in order to comply with the
electromagnetic compatibility requirements.
5. Electrical installation

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10. All external circuits must meet and maintain the requirements of double / reinforced
installation as stated in IEC 60364 or equivalent.
11. Additional protection must be provided to prevent accessible parts (e.g. signal circuits)
from becoming Hazardous Live if a wire or screw is accidentally loosened or freed. Ensure
all wires are secured to at least one other wire from the same circuit. The attachment
must be as close to the terminal block as possible but must not apply undue stress on
the connection. Example: Use a cable tie to secure the live and neutral wire together.
If one wire becomes loose the other wire will prevent it from touching accessible parts.
12. A disconnecting device (switch or circuit breaker) must be included in the building
installation. It must:
- Have a rating with sufficient breaking capacity.
- Be in close proximity to the equipment, within easy reach of the operator, but not fitted
in a position that makes it difficult to operate.
- Disconnect all phase conductors.
- Be marked as the disconnecting device for the product.
- Not interrupt a protective earth conductor.
- Not be incorporated into a mains supply cord.
- Comply with the requirements for a disconnecting device specified in IEC 60947-1
(Specification for low-voltage switchgear and control gear -General rules) and
IEC 60947-3 (Switches, disconnectors, switch-disconnectors and fuse-
combination units).
13. See Section 10 - 'Technical information' for terminal and cable specification.

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Disconnect device conforming to
IEC 60947-1 and IEC 60947-3
Disconnect device conforming to
IEC 60947-1 and IEC 60947-3
1
2
1
2
L
N
L1
L2
3 A fuse
Product
Product
3 A fuses
5.2 Mains wiring notes:
1. Read Section 5.1 - 'General wiring notes', before attempting to wire the supply to the product.
2. The wiring connections are identified on the terminal plugs.
3. Fuses must be fitted in all live conductors.
4. Double or reinforced insulation must be maintained between:
-Hazardous live conductors (mains and relay circuits) and
-Safety extra low voltages (All other components / connectors / conductors).
5. The wiring diagrams show relays and switches in the Power off position.
Fig. 3
Fig. 4

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Mains circuit
(view from the underside)
Relays are shown in the
power off position
Caution live
terminals
ac supply
Control relay Alarm 1 relay
Front
Back
3 A
fuse
Input Alarm L
N
See Section 5.2
Mains wiring notes
3 A fuses
Input
8 7 6 5421
3
Open
Modulating
control
Control valve electric
actuator (valve motor
drive)
Fig. 5 Mains circuit
Close
ON / OFF control
Pump contactor
Pump
contactor
N
N
Norm
22 21 20
Input
Alarm
Norm
Alarm 2 relay
3 A fuse

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+
-
5.3 Signal wiring notes
An earth current loop is created if a wire or screen is connected between two earth points
that are at different potential (voltage). If the wiring diagram is followed correctly, the screen
will only be connected to the earth at one end.
The earth terminal is a functional earth rather than a protective earth.
A protective earth provides protection from electric shock under a single fault condition. This
product has double insulation and therefore does not require a protective earth. A functional
earth is used in order for the product to operate. In this application, the earth is used as a
sink or drain for any electrical interference. The earth terminal must be connected to a local
earth in order to conform to the EMC directive.
5.4 Probe wiring
The maximum cable length for all transducers is 100 m (328 ft).
Note: It is essential to select the correct sensitivity on the PA20 preamplifier,
(see the PA20 Installation and Maintenance Instructions for details).
Back
Front
Notes:
Do not connect terminal 54 to any other earth
Ensure that the resistance from the probe body to the pipework / boiler shell is less than 1 ohm.
E = Functional earth - connect these pins to a clean earth local to the panel.
Fig. 6 Signal circuit
Signal circuit
(view from the top)
50 51 52 53 54 55 6256 57 58 59 60 61
Open
Close
+24 V SCNVin Iin COM SCN
Level input(s) Feedback Pot
COMRin
4 - 20 mA
output
Capacitance probe
(See PA20 IMI for
sensitivity selection)
Connect to
a clean local
earth in the
panel 4 - 20 mA
valve positioner
Screens
1 2
E