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Summary of Contents for Buderus 24C
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Page 1: Messages - Universal Automatic Burner (Uba)
7210 1300 - 02/2006 GB(EN) For trade use Servicing manual Gas wall hung boiler condensing 600 Series - 11S / 19S / 24S / 24C Please read thoroughly before attempting to diagnose fault... -
Page 2: Table Of Contents
3.1.36 Checking connections at the ERC or RC ..67 3.1.37 Replacing the room-temperature control device . 67 Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 3: Messages - Universal Automatic Burner
600 Series 11S / 19S / 24S / 24C: Open the control panel cover Press the "Service" button. Fig. 3 "Service" button Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 4: Uba Operating Level 1.5
(fig. 5, item 1). Fig. 5 Service tool connection Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 5: Operating Messages
Burner interval circuit, 10 min from burner start-up Waiting for the three-way valve and/or pump to switch Standby activated, 600 Series 11S / 19S / 24S / 24C ready to provide heat or hot water Initial safety period: self-testing of UBA during burner start-up... -
Page 6: Fault Messages
Flame dies out after gas valve is opened page 29 Flame goes out during warm-up phase page 30 Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... - Page 7 UBA system fault Non-compatible UBA fitted page 42 Table 2 Displayed UBA fault warning messages Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006...
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Page 8: Faults That The Uba Does Not Display
600 Series 11S / 19S / 24S / 24C wall-mounted condensing gas boiler fails to go into heating mode. Troubleshooting flow diagram: page 45. Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 9: Troubleshooting
Remember to return the chimney-sweep switch to “0” once work is complete. Fig. 6 Chimney sweeper switch on UBA Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 10: C Safety Sensor Exceeds 100 °C
600 Series 11S / 19S / 24S / 24C page 46 Fig. 7 Fault warning message 2C: Safety sensor temp. exceeds 100 °C Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 11: Excessive Temperature Increase At Safety Sensor
600 Series 11S / 19S / 24S / 24C page 46 Fig. 8 Fault warning message 2P: Excessive temperature increase at safety sensor Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 12: Bad Plug-In Connection At Cable Loom, Or Damaged Wiring
600 Series 11S / 19S / 24S / 24C Fig. 9 Fault warning message 3C: Bad plug-in connection at cable loom, or damaged wiring Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 13: Feed Sensor Above 100 °C
If yes, is it unclogged? page 14 page 14 Fig. 10 Fault warning message 4A: Feed sensor above 100 °C Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... - Page 14 11S / 19S / 24S / 24C Fig. 11 Continuation of fault warning message 4A: Feed sensor above 100 °C Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006...
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Page 15: F2 Fuse Malfunction, Or Exhaust-Gas Sensor Tripped
16 page 16 Fig. 12 Fault warning message 4C: F2 fuse malfunction, or exhaust-gas sensor tripped Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... - Page 16 46 Fig. 13 Continuation of fault warning message 4C: F2 fuse malfunction, or exhaust-gas sensor tripped Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006...
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Page 17: F Safety Sensor Exceeds 100 °C
600 Series 11S / 19S / 24S / 24C page 46 Fig. 14 Fault warning message 4F: Safety sensor temp. exceeds 100 °C Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 18: Dripping Tap
600 Series 11S / 19S / 24S / 24C Fig. 15 Fault warning message 4H: Dripping tap Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 19: L Short Circuit In Safety Sensor
11S / 19S / 24S / 24C Fig. 16 Fault warning message 4L: Short circuit in safety sensor Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 20: P Safety Sensor, Loose Contact Or Defective
11S / 19S / 24S / 24C Fig. 17 Fault warning message 4P: Safety sensor, loose contact or defect Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 21: Short Circuit In Feed Sensor
11S / 19S / 24S / 24C Fig. 18 Fault warning message 4U: Short circuit in feed sensor Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 22: Feed Sensor, Loose Contact Or Defective
11S / 19S / 24S / 24C Fig. 19 Fault warning message 4Y: Feed sensor, loose contact or defective Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 23: C 600 Series Has Switched Off After Disconnection Of Diagnosis Plug
Fig. 20 Fault warning message 5C: 600 Series has switched off after disconnection of diagnosis plug Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 24: F1 Fuse Defective, Or No Ionisation Message After Ignition
25 Fig. 21 Fault warning message 6A: F1 fuse defective, or no ionisation message after ignition Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... - Page 25 Fig. 22 Continuation of fault warning message 6A: F1 fuse defective, or no ionisation message after ignition Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006...
- Page 26 Fig. 23 Continuation of fault warning message 6A: F1 fuse defective, or no ionisation message after ignition Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006...
- Page 27 Fig. 24 Continuation of fault warning message 6A: F1 fuse defective, or no ionisation message after ignition Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006...
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Page 28: Ionisation Message, But No Flame
11S / 19S / 24S / 24C Fig. 25 Fault warning message 6C: Ionisation message, but no flame Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 29: H Flame Dies Out After Gas Valve Is Opened
11S / 19S / 24S / 24C Fig. 26 Fault warning message 6H: Flame dies out after main gas valve is opened Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 30: Flame Goes Out During Warm-Up Phase
11S / 19S / 24S / 24C Fig. 27 Fault warning message 6L: Flame goes out during warm-up phase Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 31: Mains Voltage
Connect correctly Fig. 28 Fault warning message 7A: Voltage in UBA too low or too high Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 32: Mains Voltage Interrupted Following A Fault Warning Message
Fig. 29 Fault warning message 7C: Mains voltage interrupted following a fault warning message Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 33: F3 Fuse Defect, Or Uba System Error
11S / 19S / 24S / 24C Fig. 30 Fault warning message: 7F: F3 fuse defect, or UBA system error Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 34: Voltage Peaks In Uba
11S / 19S / 24S / 24C Fig. 31 Fault warning message 7H: Voltage peaks in UBA Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 35: Uba Timer Error
11S / 19S / 24S / 24C page 46 Fig. 32 Fault warning message 7L: UBA timer error Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 36: External Switching Contact, E.g. Temperature Monitor For Floor Heating, Has Been Tripped
Fault warning message 8Y: External switching contact, e.g. temperature monitor for floor heating, has been tripped Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 37: System Error
11S / 19S / 24S / 24C Fig. 34 Fault warning message 9A (with any character except P): System error Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 38: C Incorrect Cable Connection At Kim, Or Kim Defective
11S / 19S / 24S / 24C Fig. 35 Fault warning message 9C: Wiring to KIM connected incorrectly Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 39: System Error (Uba Defective)
11S / 19S / 24S / 24C Fig. 36 Fault warning message 9F,H,P: System error (UBA defective), or KIM defective Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 40: Wiring To Gas-Burner Assembly Incorrect, Or Loose Wiring Connections In Uba
Fig. 37 Fault warning message 9L: Wiring to gas-valve assembly incorrect, or loose wiring connections in UBA. Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 41: Ukim Defective
11S / 19S / 24S / 24C Fig. 38 Fault warning message 9U: Incorrect cable connection at UBA (KIM defective) Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 42: P Non-Compatible Uba Fitted
11S / 19S / 24S / 24C Fig. 39 Fault warning message EP: Non-compatible UBA installed Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... - Page 43 44 page 44 Fig. 40 Malfunction: No mains water, despite system being ready for operation Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006...
- Page 44 11S / 19S / 24S / 24C Fig. 41 Continued malfunction: No mains water, despite system being ready for operation Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006...
- Page 45 Malfunction: No heating operation, despite request for activation and display message indicating that system is ready for use Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006...
- Page 46 Continued malfunction: No heating operation, despite request for activation and display message indicating that system is ready for use Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006...
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Page 47: Troubleshooting Tasks
Fig. 45 Chimney-sweep switch heats up to its preset feed temperature. Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 48: Removing And Refitting The Outer Casing
Fig. 47 600 Series 11S / 19S / 24S / 24C: Remove combustion-chamber cover Fig. 48 600 Series 24C: Combi-unit Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 49: Checking The Exhaust-Gas Sensor
Screw the mounting into place. Fig. 50 600 Series 11S / 19S / 24S / 24C: Replacing the exhaust-gas sensor Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 50: Checking The Air Intake And Outlet Openings
Fit the casing. Connect system to mains power supply. Fig. 53 Carefully lift the UBA to remove Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 51: Checking The Fan
Loosen the union nut (fig. 55, item 4) on the gas burner fitting. Fig. 55 Replacing the fan on the 600 Series: Loosen plug and union nut Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... - Page 52 600 Series 11S / 19S / 24S / 24C. Fig. 58 Replacing the fan on the 600 Series: Replace the fan Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006...
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Page 53: Checking The Wiring Connections Of The Uba
(fig. 61, item 3). Fig. 61 Connections for the second solenoid valve, modulating pump and external switching contact Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 54: Checking The Circulation Pump
Disconnect the system from the power supply. Shut the servicing cock. Drain the 600 Series 11S / 19S / 24S / 24C as per the "Installation and Servicing Instructions". Loosen the screw on the terminal box (fig. 63, item 2) of the circulation pump and open the terminal box. -
Page 55: Checking The Safety Sensor
Checking the safety sensor 3.1.17 Replacing the safety sensor Shut the servicing cock. Drain the 600 Series 11S / 19S / 24S / 24C as per the "Installation and Servicing Instructions". Loosen the plug-in connection (fig. 65, item 1). Unscrew the sensor (fig. 65, item 2) and replace with a new unit. -
Page 56: Checking The Feed Sensor
Checking the feed sensor 3.1.20 Replacing the feed sensor Shut the servicing cock. Drain the 600 Series 11S / 19S / 24S / 24C as per the "Installation and Servicing Instructions". Loosen the plug-in connection (fig. 68, item 1). Unscrew the sensor (fig. 68, item 2) and replace with a new unit. -
Page 57: Checking The Domestic Hot Water
1990 1700 1458 1255 1084 939,6 817,2 Table 3 Resistance values for hot-water/mains-water sensor (approximate values) Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 58: Changing The Domestic Hot Water
3.1.23 Changing the domestic hot water / mains water supply Shut the servicing cock. Drain the 600 Series 11S / 19S / 24S / 24C as per the "Installation and Servicing Instructions". Disconnection plug-and-socket connection on cable to hot- water/mains-water sensor. -
Page 59: Checking The Hot Surface Ingitor
Detach retaining plate of hot surface ingitor (fig. 74, item 3) and remove hot surface ingitor. Fig. 75 Disconnect the plug-in cable from the UBA housing Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 60: Checking The Gas-Burner Control System For Correct Activation
Fig. 77 Replacing the gas burner fitting on the 600 Series: Loosen plug and union nut Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... - Page 61 Fig. 80 Replacing the gas burner fitting on the 600 Series: Replace the gas burner fitting Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006...
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Page 62: Checking And Adjusting The Gas-To-Air Ratio
Fig. 82 Check the default gas-air ratio settings (factory default) setting. Turn the mains power switch to “I”. Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 63: Measuring The Ionisation Current
Pull electrode to remove, and fit new unit. Reassemble by following the above procedure in reverse. Fig. 84 Replacing the ionisation electrode Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 64: Checking The Three-Way Motorised Valve For Correct Operation
Remove regulating motor. Set the mains switch to “I” and press the “reset” button. Once the 600 Series 11S / 19S / 24S / 24C is in operation, open one of the hot-water taps. The UBA displays "... -
Page 65: Replacing The Three-Way Valve
A: Mains water, B: Heating, AB: Boiler feed line Shut the servicing cock and drain the 600 Series 11S / 19S / 24S / 24C as per the "Installation and Servicing Instructions". Dismantle condensate trap. Remove protective cap from three-way valve. -
Page 66: Checking The Erc/Rc Connections To The Uba
Connect the cables, in the right order, to the new terminal strip. Fig. 89 Opening the UBA housing Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... -
Page 67: Checking Connections At The Erc Or Rc
Attach cables, in the right order, to the new room-tempera- ture control device. Carry out the corresponding adjustment settings on the room-temperature control device. Subject to modifications resulting from technical improvements! Buderus Ltd. • http://www.buderus-domestic.co.uk Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006... - Page 68 Fax: 01905 - 456 445 / 455 394 Returns: Tel: 01905 - 752 531 Fax: 01905 - 455 392 Spares: Tel: 01905 - 752 576 Fax: 01905 - 754 620 www.buderus-domestic.co.uk Buderus is a trading name of BBT Thermotechnology UK Ltd.
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