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Boiler Controls
BC3150
Blowdown Controller
Description
The BC3150 is a blowdown controller for steam boilers. It controls
TDS (total dissolved solids – salts in solution) by opening and closing a blowdown valve. It works in conjunction with a Spirax
Sarco conductivity sensor, a boiler blowdown valve or condensate dump valve.
The product can be panel, DIN rail or chassis mounted and powered by a 110 to 240 Vac mains supply.
The front panel has a 3 digit LCD and a five-button keypad.
The product has no battery. The programmed settings are held in non-volatile memory (Flash) and are written to after changing a parameter and pressing the OK key.
Principal features:
-
Blowdown controller with temperature compensation.
-
Type approved as a TDS limiter and controller.
-
Works with CP10, CP30 or CP32 conductivity probes.
-
Wide range: 1-9990 µS/cm or ppm – (x1, x 10, x 100 x 1000).
-
LCD display with direct probe condition indicator.
-
Infrared communications.
Approvals
This product complies with the Electromagnetic Compatibility
Directive 2004 / 108 / EC and all its requirements.
The BC3150 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 BC3150 2008.
The BC3150 complies with the Low Voltage Directive by meeting the standards of:
-
EN 61010-1:2010 safety requirements for electrical equipment for measurement, control, and laboratory use.
The BC3150 has been type-tested as a TDS controller and limiter by meeting the standard:
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Vd TÜV Equipment for Water Control 100 (07.2010).
Function
All ranges and operating parameters are selected using the software menu.
Commissioning is carried out using the two lower buttons.
Once fully commissioned, the TDS value is displayed in μS/cm (or ppm if selected).
If the water conductivity exceeds the Set Point level, the TDS value shown on the display will alternate with 'bld', and the valve relay will be energised until the conductivity drops below 5% of full scale (FS) below the set point.
If the water conductivity exceeds the alarm level, the TDS value will alternate with 'AL' , and the valve relay will be energised until the conductivity drops 3% (FS) below the alarm level.
If the system is carrying out a purge, The TDS value will alternate with 'Pur', and the valve relay will be energised until the conductivity drops 5% (FS) below the set point.
BC3150
CLN
OK
AL x1000 x100 x10
Clamping screw
LCD display
5 button display
Clamping screw
Inputs
The BC3150 can accept a signal from a Spirax Sarco conductivity probe (CP10, CP30, or CP32).
A Pt100 temperature sensor may be connected to provide temperature compensation (2% / °F). This is recommended if the boiler is working at varying pressures, or for other applications, such as condensate monitoring or coil boilers, where the temperature may vary. If a Pt100 is not fitted, the product uses a default temperature of 363°F (145 psig).
Outputs
Pulsed output - For smaller boilers where the capacity of the blowdown valve is relatively high compared to the boiler size, the blowdown may be set to pulsed, rather than continuous output, opening for 10 seconds, and closing for 20 seconds. This slows the rate at which the boiler water is removed so that the level is not unduly affected, avoiding the risk of triggering a low water alarm.
Other features
To prevent unwanted or inadvertent changes being made, all commissioning parameters are protected with a pass code.
The BC3150 can communicate via an infrared link between adjacent controllers.
This feature enables the parameters of this product (OEM) to be passed to a product fitted with RS485 (user).
The BC3150 is always an IR slave – No set-up or adjustment is needed.
An isolated 4 - 20 mA output is provided as standard, and may be used for remote display of the TDS level or as an output to a computerised management system.
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Local regulation may restrict the use of this product below the conditions quoted. Limiting conditions refer to standard connections only.
In the interests of development and improvement of the product, we reserve the right to change the specification.
TI-P403-91-US
10.13
BC3150
Blowdown Controller
Technical data BC3150
Power supply
Environmental
Cable / wire and connector data
Mains and signal
TDS probe connector
Mains voltage range
Power consumption
General
110 Vac to 240 Vac at 50/60 Hz
7.5 W (maximum)
Indoor use only
Maximum altitude 2 000 m (6 562 ft) above sea level
Ambient temperature limits 0 - 55 °C (32-131°F)
Maximum relative humidity 80% up to 31 °C (88°F) decreasing linearly to 50% at 40°C(104°F)
Overvoltage category III
Pollution degree
2 (as supplied)
3 (when installed in an enclosure) -
Minimum of IP54
Enclosure rating
(front panel only)
LVD (safety)
EMC
Enclosure
Front panel
Solder
Termination
Cable size
Stripping length
Type
Shield type
Gauge
Maximum length
Recommended type
Type
Shield type
Pt100 probe
Number of cores
cable / wire
Gauge
Maximum length
Recommended type
Type
4 - 20 mA
Shield type
output
Number of pairs
cable / wires
Gauge
Maximum length
Recommended type
IP65 (verified by TRAC Global)
Electrical safety EN 61010-1
Immunity/Emissions Suitable for heavy industrial locations
Material
Material
Polycarbonate
Silicone rubber, 60 shore.
Tin / lead (60 / 40%)
Rising clamp plug-in terminal blocks with screw connectors.
Caution: Use only the connectors supplied by Spirax Sarco Ltd. -
Safety and Approvals may be compromised otherwise.
0.2 mm ² (24 AWG) to 2.5 mm² (12 AWG).
5 - 6 mm (0.2")
High temperature
Screened
1 – 1.5 mm ² (18 - 16 AWG)
0 - 9.99 range - 10 metres (33ft)
0 - 99.90 range - 30 metres (100ft)
0-999.0 range and 0-9990 ranges - 100 metres (328ft)
Prysmian (Pirelli) FP200, Delta Crompton Firetuf OHLS
High temperature, twisted
Screened
3
1 - 1.5 mm² (18 - 16 AWG)
100 m (328 ft)
Various
Twisted pair
Screened
1
0.23 - 1 mm ² (24 - 18 AWG)
100 m (328 ft)
Various
Boiler Controls
Spirax Sarco, Inc., 1150 Northpoint Blvd., Blythewood, SC 29016 • Phone: (803) 714-2000 • Fax: (803) 714-2222
© Spirax Sarco, Inc. 2001
TI-P403-91-US
10.13
47
Boiler Controls
BC3150
Blowdown Controller
Technical data BC3150 (continued)
Output technical
data
Probe types
Water
Ranges
conductivity
Accuracy
µS/cm to ppm conversion
Neutralising factor
Input
Resolution
technical
Drive:
CP10, CP30 and CP32
0 – 9.99 ppm or µS/cm
0 – 99.9 ppm or µS/cm
0 – 999 ppm or µS/cm
0 – 9990 ppm or µS/cm
±2.5% FSD (possibly > in high EM locations)
0.7
0.7
0.1% FSD
ac – 4 wires
data
Temperature
Sensor type
Range
Pt100 – Class B or better
0 - 250°C
(With Pt100 not fitted – user programmed temperature 100 - 250°C, 1°C steps)
compensation
Accuracy
(TC)
Resolution 0.1% FSD
Probe cleaning
Drive:
Maximum voltage
Drive
Time
Minimum current
dc – 3 wires
32 Vdc
Pulsed (1 second on, 1 second off)
20 seconds
0 mA
4 - 20 mA
Relays
Maximum current
Open circuit voltage
(maximum)
Resolution
Maximum output load
Isolation
20 mA
19 Vdc
0.1% FSD
500 ohm
100 V
Output rate
Contacts
10 / second
2 x single pole changeover relays (SPCO)
Voltage ratings (maximum) 250 Vac
Resistive load
Inductive load
3 amp @ 250 Vac
1 amp @ 250 Vac ac motor load
Pilot duty load
¼ HP (2.9 amp) @ 250 Vac
1 /
10
HP (3 amp) @ 120 Vac
C300 (2.5 amp) - control circuit / coils
Electrical life (operations) 3 x 10 5 or greater depending on load
Mechanical life (operations) 30 x 10 6
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Spirax Sarco, Inc., 1150 Northpoint Blvd., Blythewood, SC 29016 • Phone: (803) 714-2000 • Fax: (803) 714-2222 TI-P403-91-US
10.13
BC3150
Blowdown Controller
Safety information, installation and maintenance
Warning: This document does not contain sufficient information to install the unit safely. The unit operates at a potentially fatal mains voltage. Before attempting to install the unit read the Installation and Maintenance Instructions supplied with it.
Caution: before installing and connecting the power ensure there is no condensation within the unit. The product may be installed on a DIN rail, on a chassis plate, or in a panel cutout. A bezel is supplied.
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) is required. Spirax Sarco can provide suitable plastic or metal enclosures
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.
Do not cover or obstruct the infrared beam between products.
No special servicing, preventative maintenance or inspection of the product is required.
Boiler water level controls and level alarms do, however, require testing and inspection.
Dimensions / weight
(approximate)
Weight 1 lb
52 mm
(2.05")
120 mm
(4.72")
Boiler Controls
BC3150
CLN
OK
AL x1000 x100 x10
140 mm
(5.51")
120 mm
(4.72")
How to specify
Blowdown controller with LCD display and five-button keypad, and infrared communications.
How to order
Example: 1 off Spirax Sarco BC3150 blowdown controller.
Spirax Sarco, Inc., 1150 Northpoint Blvd., Blythewood, SC 29016 • Phone: (803) 714-2000 • Fax: (803) 714-2222 TI-P403-91-US
10.13
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