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Bosch Buderus SSB399 Control Operations Manual

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Bosch Buderus SSB Boiler Control Operations
SSB255 | SSB399 | SSB512
Control Operations Guide
WARNING:
the heating system can cause personal injury and property damage.
Follow these instructions precisely.
If you require assistance or further information, contact a licensed

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  Summary of Contents for Bosch Buderus SSB399

  • Page 1 WARNING: the heating system can cause personal injury and property damage. Follow these instructions precisely. If you require assistance or further information, contact a licensed Bosch Buderus SSB Boiler Control Operations SSB255 | SSB399 | SSB512 Control Operations Guide...
  • Page 2 2 | Bosch Buderus SSB255 | SSB399 | SSB512 Boilers Control Operations Guide 03.2018 | Bosch Thermotechnology Corp. Data subject to change...
  • Page 3: Table Of Contents

    Control Operations Guide Bosch Buderus SSB255 | SSB399 | SSB512 Boilers | 3 Table of Contents 1 Key to Symbols and Safety Instructions 1.1 Key to symbols 1.2 Safety 2 Boiler Settings Menu 3 Heating Modes 3.1 Central heating (CH) mode...
  • Page 4: Key To Symbols And Safety Instructions

    4 | Bosch Buderus SSB255 | SSB399 | SSB512 Boilers Control Operations Guide 1 Key to Symbols and Safety Instructions 1.2 Safety Please read safety precautions before installation 1.1 Key to symbols Warnings WARNING:  Improper installation, set-up, modification, operation or Warnings in this document are identifi...
  • Page 5: Boiler Settings Menu

    Control Operations Guide Bosch Buderus SSB255 | SSB399 | SSB512 Boilers | 5 2 Boiler Settings Menu Function Parameter Description Central Heating (CH) Mode Pump Mode CH Setpoint System Pump Overrun Boiler Pump Overrun General Operation Central Heating Hysteresis (Diff erential) Anti Cycle Period Anti Cycle Temperature Diff...
  • Page 6: Heating Modes

    6 | Bosch Buderus SSB255 | SSB399 | SSB512 Boilers Control Operations Guide 3 Heating Modes 3.1 Central heating (CH) mode There are 6 onboard CH Mode settings which may be selected with the SSB Boiler. CH Mode = “0” [default mode] Setpoint control of the boiler using dry contacts (TT) CH Mode = “1”...
  • Page 7 Control Operations Guide Bosch Buderus SSB255 | SSB399 | SSB512 Boilers | 7 Central Heating Mode 1 (On/Off with Outdoor Reset using dry contacts #11 and #12) CH Mode “1” - Boiler demand is generated thru a call for heat on low voltage contacts #11 and #12 (dry contacts only).
  • Page 8 8 | Bosch Buderus SSB255 | SSB399 | SSB512 Boilers Control Operations Guide Central Heating Mode 2 (Full Outdoor reset with no heat demand) CH Mode“2” - Boiler demand is generated when the outdoor temperature falls below the value of “Weather Setpoint” (par.#29). When this occurs the Boiler and CH pump contacts are energized and the Boiler will target a system supply water temperature corresponding to a point on the installer programmed heating curve.
  • Page 9 Control Operations Guide Bosch Buderus SSB255 | SSB399 | SSB512 Boilers | 9 Central Heating Mode 3 (Permanent set point demand) CH Mode“3” - Boiler demand is always “ON” in CH Mode 3 – “Permanent Demand Mode”. In this mode the Boiler and CH Pump contacts will always be energized. When the Supply Temperature Sensor falls below the value of “CH Setpoint”...
  • Page 10 1 0 | Bosch Buderus SSB255 | SSB399 | SSB512 Boilers Control Operations Guide Central Heating Mode 4 (Analog 0-10 Vdc Setpoint Control) CH Mode“4” - Boiler demand is generated by a 0-10 Vdc analog signal from a Building Management System (BMS). An initial heat request is generated via a signal of 1.5 VDC or greater.
  • Page 11 Control Operations Guide Bosch Buderus SSB255 | SSB399 | SSB512 Boilers | 11 Central Heating Mode 5 (Analog 0-10 Vdc Power % Modulation) CH Mode“5” - Boiler demand is generated by a 0-10 VDC analog signal from a Building Management System (BMS). An initial heat request is generated via a signal of 1.5 VDC or greater.
  • Page 12: General Operation Settings

    1 2 | Bosch Buderus SSB255 | SSB399 | SSB512 Boilers Control Operations Guide 4 General Operation Settings Parameter Description CH Mode Set Central Heating (CH) Mode based upon the desired control strategy for the boiler. See pages 2 thru 7 of this manual for a detailed explanation of each CH Mode.
  • Page 13 Control Operations Guide Bosch Buderus SSB255 | SSB399 | SSB512 Boilers | 13 Pump mode = 2 (default) Boiler with a manifold and two pump circuits CH/DHW DHW_mode=0 (Ch only) DHW_mode=1 T_flue T_supply Safety Limit Primary J6-1 Heat Exchanger Primary...
  • Page 14: Outdoor Reset Curve Settings

    1 4 | Bosch Buderus SSB255 | SSB399 | SSB512 Boilers Control Operations Guide 5 Outdoor Reset Curve Settings Parameter Description Design Supply Temperature The water temperature the boiler will supply at Design Outdoor temperature (parameter #19) Design Outdoor Temperature...
  • Page 15 Control Operations Guide Bosch Buderus SSB255 | SSB399 | SSB512 Boilers | 15 Parameter Description Boost Temp Increment is active for CH Modes 1. If a call for heat has not been satisfi ed within the period of time Boost Temp Increment defi...
  • Page 16: Domestic Hot Water

    1 6 | Bosch Buderus SSB255 | SSB399 | SSB512 Boilers Control Operations Guide 6 Domestic Hot Water 6.1 Domestic hot water settings Parameter Description DHW Mode When an Indirect tank is present in the system set DHW Mode to “1” when using the factory supplied 10K ohm (parameter #35) sensor or set to “2”...
  • Page 17: Domestic Hot Water Operation

    Control Operations Guide Bosch Buderus SSB255 | SSB399 | SSB512 Boilers | 17 6.2 Domestic hot water operation The SSB Boiler onboard control can support domestic hot water production using an indirect tank. The boiler can use either the supplied 10K ohm domestic sensor or a aquastat (dry contact only, aquastat supplied by installer) to control the heating of an indirect tank.
  • Page 18: Cascade Operation

    1 8 | Bosch Buderus SSB255 | SSB399 | SSB512 Boilers Control Operations Guide 7 Cascade Operation 7.1 Cascade operation settings Parameter Description Enable Emergency Mode in a multiple boiler cascade installation to ensure that any dependent boiler can operate...
  • Page 19 Control Operations Guide Bosch Buderus SSB255 | SSB399 | SSB512 Boilers | 19 Parameter Description Max. Setpoint Off set UP. See Parameter #79 for explanation of Off set UP and Off set Down. Default value of Off set UP is 18 °F. Adjustable (parameter #80) from 0 °F to 36 °F.
  • Page 20: Cascade Operation - Set-Up Of Boilers

    2 0 | Bosch Buderus SSB255 | SSB399 | SSB512 Boilers Control Operations Guide 7.2 Cascade operation - set-up of boilers Connect up to 16 boilers together using standard 18/2 thermostat cable. The Cascade connections can be found on the low voltage terminal block at contacts #1 and #2.
  • Page 21 Control Operations Guide Bosch Buderus SSB255 | SSB399 | SSB512 Boilers | 21 Set System settings on Managing Boiler: There are a number of parameter Parameters which should be set on all other boilers within the cascade: settings which only need to be set on the Managing boiler. Follow the steps outlined in step 4 to access and adjust the following parameters within the ...
  • Page 22: Cascade - Start Sequence

    2 2 | Bosch Buderus SSB255 | SSB399 | SSB512 Boilers Control Operations Guide 7.3 Cascade - start sequence 7.4 Cascade - stop sequence When the power (%) level of one boiler falls below the value of Next Boiler When the system temperature is less than Target Setpoint minus the value Stop Rate (par.#83) the last boiler brought on will be stopped.
  • Page 23: Start-Up & Commissioning Settings

    Control Operations Guide Bosch Buderus SSB255 | SSB399 | SSB512 Boilers | 23 8 Start-up & Commissioning Settings Parameter Description Default setting for Frost Protection is “Disabled”. When “Enabled” Frost Protection Setpoint will be actived when the Frost Protection temperature of the supply or return water sensor reaches Frost Protection Setpoint (see parameter (parameter #89) #90 below).
  • Page 24: Cascade Quick Set-Up

    2 4 | Bosch Buderus SSB255 | SSB399 | SSB512 Boilers Control Operations Guide 9 Cascade Quick Set-Up Turn Power “OFF” to the managing boiler and turn Power “ON” to the next boiler in the Cascade. The power switch must be turned “OFF” on all boilers before beginning set-up of the Repeat steps from Step #4 and enter into the parameter menu for the 2nd cascade.
  • Page 25 Control Operations Guide Bosch Buderus SSB255 | SSB399 | SSB512 Boilers | 25 Bosch Thermotechnology Corp. | 03.2018 Data subject to change...
  • Page 26 2 6 | Bosch Buderus SSB255 | SSB399 | SSB512 Boilers Control Operations Guide 03.2018 | Bosch Thermotechnology Corp. Data subject to change...
  • Page 27 Control Operations Guide Bosch Buderus SSB255 | SSB399 | SSB512 Boilers | 27 Bosch Thermotechnology Corp. | 03.2018 Data subject to change...
  • Page 28 United States and Canada Bosch Thermotechnology Corp. 65 Grove Street Watertown, MA 02472 Tel: 866-642-3198 Fax: 954-776-5529 www.boschheatingandcooling.com BTC 438002101 B / 03.2018...

This manual is also suitable for:

Buderus ssb255Buderus ssb512