IM-P405-39 4058152/1 AB Issue 1 BT1050 Boiler Blowdown Timer Installation and Maintenance Instructions A ve rc hi BT1050 1. Safety information 2. General product and delivery information 3. System overview 4. Mechanical installation 5. Electrical installation 6. Commissioning - Quick set-up - Full 7. Communications 8. Maintenance 9. Fault finding 10. Technical information - Default settings 11. Appendix - Summary of the Modbus protocol 12.
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. In the UK, your attention is drawn to IEE Regulations (BS 7671). Elsewhere, other regulations will normally apply.
Symbols Equipment protected throughout by double insulation or reinforced insulation. ve Functional earth (ground) terminal, to enable the product to function correctly. Not used to provide electrical safety. hi Clean earth / ground. rc Safety earth. A 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.
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.
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 hi 1.
2. General product and delivery information 2.1 General description The BT1050 is a timer for the control of a bottom blowdown valve. It allows a valve at the bottom of the boiler to open, removing precipitated solids that could otherwise build up, eventually causing damage. The product can be panel, DIN rail or chassis mounted and is powered by a 99 - 264 Vac mains supply. 2.2 Front panel ve The front panel has an LCD graphics display and five-button keypad: Fig.
Time Information line / Date Timer information Which timer is to time-out next: Timer number Day Time Fig. 2 Graphic display Indicates an error or alarm ve 5 Another timer is blowing down or Recovery timer: Indicates the time before another blowdown can safely occur, because the blowdown vessel is still cooling down. Features only available on linked BT1000 or BT1050 timers. Seconds hi Data to be edited is always displayed on the bottom right of the screen.
2.4 Alarm / error display messages If an error occurs, an exclamation mark (!) will flash in the bottom left corner of the run display (see Figure 2). The details of the error or alarm will appear on a new message screen (see Figure 3), which can be accessed by scrolling through the run menu. 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 message will reappear.
2.6 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.
4. Mechanical installation 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. This product meets the requirements of Clause 23.2 of UL508 and can be considered part of the 5 VA fire enclosure for industrial use. 4.
Ø 4.2 mm Ø 4.2 mm 10 mm 15 mm ve 45 mm 22.5 mm 92 mm hi 112 mm A rc 22 mm 10 mm Ø 4.2 mm Ø 4.2 mm 67 mm Fig. 4 Chassis plate / panel cutout diagram 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.
5. Electrical installation 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. 5.
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.
5.2 Mains wiring notes: 1. Read Section 5.1, General Wiring notes, before attempting to wire the supply to the product. 2. Fuses must be fitted in all live conductors. Disconnect device conforming to IEC 60947-1 and IEC 60947-3 Product 2 Disconnect device conforming to IEC 60947-1 and IEC 60947-3 230 / 115 Vac from supply Product L 3 A fuse 1 2 N 230 / 115 Vac from supply L1 3 A fuses L2 ve 1 3.
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. ve A protective earth provides protection from electric shock under a single fault condition.
5.4 EIA / TIA-485 communication wiring diagram Front The product can be connected as a slave to a two or four-wire EIA / TIA-485 multi-drop network. Slave(s) (Boiler controller) COM SCN Tx- 97 96 95 94 93 92 91 90 rc R* hi ve E Tx+ Rx- Rx+ H / D H / D Common R* B' A' R* R* B A A Rx Earth* * See wiring notes Tx Master Fig.
Front Slave(s) (Boiler controller) COM SCN Tx- E Tx+ Rx- Rx+ H / D H / D 97 96 95 94 93 92 91 90 A R* rc hi ve Add link between terminals 91 and 90 Common R* Earth* * See wiring notes Rx Tx Master Fig. 8 RS485 / Modbus half duplex circuit (view from the top) EIA / TIA-485 wiring notes continued: - The bus common must be connected directly to protective ground / earth at one point only. Generally this point is at or near the master device.
6. Commissioning The programmed settings are held in non-volatile memory (Flash) and are written to after changing a parameter and pressing the OK button. For quick set-up see Section 6.2. An internal battery is used to keep the clock calendar running when the mains supply is switched off. To connect the battery, set both switches of SWI (see Section 5.3), to the on/down position.
6.1.1 Enter commissioning This is done from the run mode by pressing and holding down the PASS CODE OK button for 5 seconds. The run mode display will disappear and the display will show 'PASS CODE' with '8888' at the bottom right corner of the screen. The flashing leading digit indicates the position of the cursor. The default, or factory set pass code is 7452 but this can be changed from within the commissioning mode.
6.1.3 Changing settings (parameters) If a particular sub-menu requires a parameter to be modified, the corresponding units (if any) will appear on the next line (in brackets) and the parameter itself will appear on the bottom right hand corner. The first digit will start flashing and the parameter can be modified. If the OK button is pressed, the displayed value will be entered into memory. If the button is pressed the value remains unchanged.
6.3 Commissioning - full 6.3.1 Main menu structure MODE DATA Allows the user to view and change the valve status OFF, OPEN or AUTO. Allows displayed units to be configured:Temperature in °C or °F, multiple timer priority and recovery time to allow blowdown vessel contents to cool. Configures the link to switch box on the bottom blowdown valve. ve INPUT OUTPUT Configures the output communications link. Sets actual year, date and time.
6.3.2 Commissioning via the sub-menus Sub-menus and their functions are outlined below, and enable the user to programme the unit. Additional information is given where further choices can be made. On selecting the sub-menu, the changeable variables will appear on the screen bottom right. The initial parameter will be the value currently stored in memory. To change the parameter, scroll through the options using the and buttons. Note the parameters currently saved /selected will flash.
6.3.4 DATA sub-menu DATA TEMP °F or °C (°C default). Select the preferred option and press OK button. Prevents more than one boiler blowing down at the same time. Selects which timer has priority (opens the blowdown valve first). 9 = highest priority and 1 = lowest priority If the timer is not linked to other timers, set priority to '0'. Sets time (in hours and minutes) for blowdown vessel to cool. Setting the recovery time to 'zero' will clear any recovery time in process.
6.3.6 OUTPUT sub-menu Selects MODBUS communication settings OUTPUT COMMS ADDRESS Address This sets the address for Modbus communication. The default is 001, and the maximum is 247. OUTPUT COMMS BAUD IR Comms Sets Infrared master / slave configuration. Select SLAVE unless communication is required. A rc OUTPUT COMMS IR COMMS hi ve Baud rate defines the speed of communication between the product and an interrogating device in bits per second.
6.3.7 CLOCK sub-menu CLOCK HRS HRS (24) sets time in hours. CLOCK MINS CLOCK YRS rc CLOCK MONTH Sets current year (e.g. 09). hi ve Sets time in minutes. A Sets month (e.g. 05 for May). CLOCK DATE Sets date (1-31). CLOCK DAY Sets actual day of the week. Note This is not day(s) on which blowdown occurs. CLOCK FORMAT IM-P405-39 AB Issue 1 Sets date / month format. Select day / month, as UK, Europe, or month / day, as USA.
6.3.8 TIMER sub-menu This timer controls the bottom blowdown times and their duration. The parameters will vary according to the type of boiler. Seek advice from a boiler manufacturer, insurance company, or a competent water treatment company. Timers 1, 2, and 3 are set in exactly the same way see below:- ve This is the time (in seconds) the blowdown valve is to open the actual blowdown period. Seek advice from a boiler manufacturer, insurance company, or a competent water treatment company.
6.3.9 ALARM sub-menu Only shows if the switch is FITTED. Set ON or OFF. ON The alarm will sound if the valve fails to lift within the time set in INPUT / LIFT. OFF No alarm. Note: If ON selected, alarm will operate if MODE set to OPEN, or if valve is manually opened. ALARM LIFT ALARM LATCH hi ve ON Alarm will latch until commissioning mode is entered. OFF Alarm will only sound until the alarm condition is removed. TEST DISPLAY Tests the display: - (black on white or white on black).
6.3.11 SOFTWARE VERSION sub-menu SW VER Allows the software version to be viewed. See separate literature for further information. ve 6.3.12 PASS CODE sub-menu This allows the default pass code to be changed to a user-defined value. It is important that if the default pass code is changed that the new value is noted and kept safe.
7. Communications 7.1 Infrared (IR) All products in the range can communicate via an infrared bus between adjacent controllers. It enables the parameters of up to seven slave products to be passed to a master product fitted with RS485 (products with a graphics display). The product connected to the RS485 networks must be fitted on the left of all the slaves fitted to the IR bus (Figure 10) and have ‘master’ selected in the ‘output-comms’ menu.
7.2 RS485 addressing An offset is added to the register addresses (see above) for each device, depending on their position on the IR bus, i.e. the master’s offset is 0, the device to its right hand side has an offset of 100, the one to its right 200 and so on. Master Slave ve RS485 Slave Slave Slave IR address 1 RS485 Offset 0 hi IR Bus 2 3 4 5 100 200 300 400 rc Fig. 12 A 8. Maintenance Note: Read the 'Safety information' in Section 1 before doing any maintenance. 8.
8.2 Replacement and disposal of battery Caution: - Permanent damage will occur if the printed circuit board (pcb) is completely removed. - Do not remove the front keypad. rc hi ve 8.2.1 Cut the two side labels along the join line. A 8.2.2 Squeeze enclosure in positions indictated to release locking tabs.
rc hi ve 8.2.3 Remove the rear half of the enclosure only. A 8.2.4 Remove the blue support.
8.2.5 Caution: permanent damage will occur if the printed circuit board (PCB) is completely removed. Slide the PCB out just far enough to access the cable tie securing the battery. rc hi ve Cable tie hole A 8.2.6 Cut the cable tie and lift the battery from the PCD.
8.2.7 Insert the new battery. See Section 10.5 for the battery type. rc hi ve Note: the battery is polarised and only fits one way round. 8.2.8 Thread a new cable tie through holes in the PCB, fasten securely around the battery A and trim the end.
8.2.9 Slide the PCB fully back into position and refit the blue support. Ensure the arrow rc hi ve shapes on the support point toward the front. A 8.2.10 Replace the rear half of the enclosure.
9. Fault finding The most likely time for faults to occur is during installation and commissioning. The most common fault is incorrect wiring. If after applying power to the product an error message is displayed, it may be necessary to fault find. To simplify and aid in this process, the product has a Test menu (see Section 6.3.10 and 2.4). WARNING: Before fault finding read the Safety information in Section 1 and the General wiring notes in Section 5.1.
Symptom Action 2 1. Switch off the mains supply to the product. 2. Disconnect all signal wires. 3. Switch the mains supply on: If symptoms are still present, return the product for examination. 4. Replace each signal wire in turn until the fault occurs. 5. Investigate and rectify any faults in the wiring, external sensors / transducers and modules associated with that connection. The internal power supply is unable to power up.
Operational error messages Any operational errors that occur will be displayed in the run mode, on the alarms and errors screen. Error message 1 There has been a loss of power to the product during operation. 1. Remove the power from the product. 2. Check that all the wiring is correct. 3. Check that the power supply is secure, i.e. does not suffer from 'brown outs'. 4. Reapply power. 5. Press the OK button to clear. rc Valve failed to open Blowdown valve fails to start to open.
Error message 8 Action Cause 1. See 'Data timer X 'Invalid' action. 2. Press the OK button to clear. 9 Data in the timer flag register has been lost or corrupted. Values have been restored. 1. See 'Data timer X 'Invalid' action. 2. Press the OK button to clear. 10 Data in the error flag register has been lost or corrupted. Values have been restored. 1. See 'Data timer X Invalid' action. 2. Press the OK button to clear.
10. Technical information 10.1 For technical assistance Contact your local Spirax Sarco representative. Details can be found on order / delivery documentation or on our web site: www.spiraxsarco.com 10.2 Returning faulty equipment Please return all items to your local Spirax Sarco representative. Please ensure all items are suitably packed for transit (preferably in the original cartons). ve Please provide the following information with any equipment being returned: 1.
10.5 Battery (Clock calendar) Type Voltage Capacity Temperature range Shelf life Working life TADIRAN SL-360/PT 0965057 AA (PCB tagged) Lithium Thionyl Chloride (Lithium content 0.65 g) 3.6 V 2.4 Ah minimum 0 - 70°C minimum 10 years - With battery switch OFF @ Tamb: 25°C 10 years - Mains power on 35 hours / week @ Tamb: 55°C ve Manufacturer Manufacturers part number Spirax Sarco part number 10.
10.7 Input technical data Switch box Maximum voltage Maximum current 32 Vdc (no load, open circuit) 3 mAdc (short circuit) Lockout (link) Maximum voltage Maximum pulldown voltage Maximum current 32 Vdc (no load, open circuit) 0.25 Vdc 1.5 mAdc ve 10.8 Output technical data Relay(s) ac motor load A rc Pilot duty load Electrical life (operations) Mechanical life (operations) RS485 2 x single pole changeover relays (SPCO) 250 Vac 3 amp @ 250 Vac 1 amp @ 250 Vac ¼ HP (2.
10.10 Default settings 10.10.1 MODE MENU Allows the valve to be manually opened or closed, automatically opened and closed under the control of the timer Ranges AUTO, OPEN, OFF Default AUTO 10.10.2 DATA MENU °C or °F °C PRIORITY Ranges Default Resolution (steps) 0 - 9 (Highest priority) 0 (Timer not linked) 1 ve TEMP (temperature units) Ranges Default 00 - 11 4 1 Hours (HRS) rc HRS HOURS Ranges Default Resolution (steps) Units hi 10.10.
10.10.5 OUTPUT MENU COMMS ADDRESS (MODBUS communication) Ranges 0 - 247 Default 1 Resolution (steps) 1 COMMS BAUD (MODBUS communication) Ranges 1200, 9600, 19200 Default 9600 COMMS IR (units in network) Ranges 10.10.
10.10.7 TIMER X (1 - 3) MENU DURATION (valve open time) Ranges Default Resolution (steps) Units 0 - 999 0 1 Seconds Note: If the mains power supply drops below the required specification, or power down occurs during a blowdown, the relays will de-energize and close the valve. If the mains supply is restored after the blowdown time has elapsed, the valve will remain shut until the next scheduled blowdown time.
10.10.
11.
Parameter Illegal function Illegal data address Byte 1 Device Address XX Byte 2 Function Code 83 Byte 3 Exception Code 01 Byte 4 CRC (LSB) XX Byte 5 CRC (MSB) XX XX 83 02 XX XX rc hi Modbus CRC programme in BASIC Dim crc Dim TempCrc Dim i As Integer Dim j As Integer Dim Character crc = 65535 ve The Modbus Cyclic Redundancy Routine (CRC) is defined as follows: - First load the 16 bit CRC register with FFFF hex.
IM-P405-39 AB Issue 1 8888 The tinted zone indicates a feature that is not always shown. (ERROR) LIFT / SEC CLOSING / SEC RECOVERY / HRS PRIORITY TIMER 3 TIMER 2 TIMER 1 TIME: DATE/ PASSCODE Run mode Only visible if an error or alarm has occured Not visible if the switch is not fitted Not visible if the duration = 0 49 01 01 MONTH DATE New format X.X.X.X.
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