Install Instructions
Table Of Contents
- Table of Contents
- 1 Key to symbols and safety instructions
- 1.1 Key to symbols
- 1.2 General safety instructions
- 2 Scope of delivery
- 3 Information about the appliance
- 3.1 Proper use
- 3.2 Overview of boiler types
- 3.3 Rating plate
- 3.4 Appliance description
- 3.5 Accessories
- 3.6 Product dimensions and minimum clearances
- 3.7 Appliance layout heating boiler KBR..-3A
- 3.8 Appliance layout combi boiler KWB..-3A
- 3.9 Electrical wiring heating boiler KBR..-3A
- 3.10 Electrical wiring combi boiler KWB..-3A
- 3.11 Technical data heating boiler KBR 16-3
- 3.12 Technical data heating boiler KBR 21 -3
- 3.13 Technical data heating boiler KBR 28-3
- 3.14 Technical data heating boiler KBR 35-3
- 3.15 Technical data heating boiler KBR 42-3
- 3.16 Technical data combi boiler KWB 28-3
- 3.17 Technical data combi boiler KWB 35 - 3
- 3.18 Technical data combi boiler KWB 42 - 3
- 3.19 Condensate composition
- 4 Regulations
- 5 Common Applications of KBR boilers
- 6 Installation
- 6.1 Installation and operation
- 6.1.1 Notes on installation and operation
- Fill and make-up water for the heating system
- Recommended steps for commissioning a new or retrofit boiler installation
- Recirculation pump/DHW recirculation lines
- Open vented heating systems
- Gravity heating systems
- Galvanized radiators or pipes.
- Plastic pipe work
- Use of a room temperature control
- Primary-secondary piping or a Low Loss Header (LLH)
- Water Chemistry Guidelines
- Corrosion inhibitors
- Boiler sealer
- LPG
- 6.1.2 Other important information
- 6.1.1 Notes on installation and operation
- 6.2 Comparing the size of the integrated expansion vessel (KWB-3A boiler only)
- 6.3 KBR..-3A appliances (heating boilers): Selecting an expansion vessel
- 6.4 Selecting the installation location
- 6.5 Low Loss Header (LLH) utilization
- 6.6 Locating the appliance
- 6.7 Installing a low water cut off (LWCO)
- 6.8 Connecting flue gas accessories
- 6.9 Testing gas and water connections for leaks
- 6.1 Installation and operation
- 7 Making the electrical connections
- 8 Commissioning
- 8.1 Before operating the appliance
- 8.2 Switching the appliance ON/OFF
- 8.3 Setting up space heating
- 8.4 Programming the FW 200 heating control unit (optional accessory)
- 8.5 FW 200 outdoor reset heating control quick start (optional accessory)
- 8.6 After commissioning
- 8.7 KBR..-3A appliances (heating boilers) with DHW tank: Setting the DHW temperature
- 8.8 KWB..-3A appliances (combi boilers): Setting the DHW temperature
- 8.9 Setting manual summer mode
- 8.10 Setting frost protection
- 8.11 Activating the key pad lock
- 9 KBR..-3A appliances (heating boiler) with DHW tank: Thermal disinfection
- 10 Boiler circulator
- 11 Heatronic boiler control settings
- 11.1 Guideline to service functions
- 11.2 Overview of the service functions
- 11.3 Description of the service functions
- 11.3.1 First service level
- Service function 1.A: Maximum space heating output
- Service function 1.b: Maximum DHW output
- Service function 1.E: Pump mode for space heating operation
- Service function 1. F: Pump mode (only heating boiler KBR..-3A)
- Service function 2.A: Heating circuit pump lockout time (only heating boiler KBR..-3A)
- Service function 2.b: Maximum supply temperature
- Service function 2.C: Purging function
- Service function 2.d: Thermal disinfection (legionella protection)
- Service function 2.F: Operating mode
- Service function 3.A: Automatic anti-cycle function
- Service function 3.b: Set anti-cycle time
- Service function 3.C: Switching differential
- Service function 3.d: Minimum output (heating and DHW)
- Service function 3.E: Cycle time, keeping DHW hot (only combi boiler KWB..-3A)
- Service function 3.F: Constant DHW period (only combi boiler KWB..-3A)
- Service function 4.b: Maximum heat exchanger temperature (only combi boiler KWB..-3A)
- Service function 4.d: Audible fault warning tone
- Service function 4.E: Appliance type
- Service function 4.F: Condensate trap filling sequence
- Service function 5.A: Reset inspection interval
- Service function 5.b: Fan post purge time
- Service function 5.E: Functionality of black plug in boiler junction box
- Service function 5.F: Set inspection interval
- Service function 6.A: Display the latest fault code
- Service function 6.b: Room temperature control, current voltage, terminal 2
- Service function 6.C: Supply temperature required by weather compensation control
- Service function 6.d: Current DHW turbine flow rate (only combi boiler KWB..-3A)
- Service function 7.A: Indicator lamp for burner operation / faults
- Service function 7.b: 3-way valve in center position
- Service function 7.d: Connecting an external supply or low-loss header temperature sensor
- Service function 7.E: Building drying function
- Service function 0.A: Do not use this setting!
- Service function 0.d: Altitude adjustment
- Service function 0.E: Metric or US customary units
- 11.3.2 Second service level
- Service function 8.A: Software version
- Service function 8.b: Code plug number
- Service function 8.C: GFA Gas burner control unit status
- Service function 8.d: GFA Gas burner control unit fault
- Service function 8.E: Restore boiler to factory settings
- Service function 8.F: Permanent ignition
- Service function 9.A: Constant mode
- Service function 9.b: Current fan speed
- Service function 9.C: Current boiler output
- Service function 9.d: Set fan start speed
- Service function 9.E: Turbine signal delay (only combi boiler KWB..-3A)
- Service function 9.F: Heating zone pump post purge
- Service function A.b: Display DHW temperature
- Service function A.C: Display DHW tank temperature
- Service function b.F: Solar DHW backup heating delay (only combi boiler KWB..-3A)
- Service function C.d: Display current heat demand
- 11.3.1 First service level
- 12 Gas type conversion
- 13 Flue gas test
- 14 Environmental responsibility/disposal
- 15 Inspection and maintenance
- Heat exchanger
- Heatronic boiler control
- Notes on installation and operation
- After the inspection/maintenance
- 15.1 Description of various steps
- 15.1.1 Calling up the latest fault (service function 6.A)
- 15.1.2 Fresh water filter (only combi boiler KWB..-3A)
- 15.1.3 Plate type heat exchanger (only combi boiler KWB..-3A)
- 15.1.4 Checking the electrodes
- 15.1.5 Burner servicing
- 15.1.6 Heat exchanger block inspection and cleaning
- 15.1.7 Condensate trap cleaning
- 15.1.8 Checking the mixer diaphragm
- 15.1.9 Expansion vessel
- 15.1.10 Setting the boiler water pressure
- 15.1.11 Testing system water quality
- 15.1.12 Inspecting electrical wiring
- 15.2 Checklist for annual inspection and maintenance
- 16 Readings on the display
- 17 Faults
- 18 Commissioning log for the appliance
- 19 Spare parts
- Index
Installation | 35
6 720 810 590 (2015/05)
Greenstar FS
6.7 Installing a low water cut off (LWCO)
The boiler is equipped with several sensors that prevent firing or running
the boiler in case of low water pressure or low water levels. Nevertheless
code may require the installation of a separate low water cut off (LWCO)
device.
The boiler is equipped with a dedicated port for installation of a LWCO
device on the supply pipe on the back of the boiler cabinet. This location
represents the minimum water level for safe operation of the boiler.
The LWCO device must be specified for an ambient temperature of
176 °F (80 °C) and a water temperature of 250 °F (121 °C).
The following LWCO is approved with the boiler:
• Hydrolevel Safgard 1100
The device is available at most Bosch wholesalers. It requires an
external 24VAC minimum 20VA transformer provided on site.
▶ Disconnect the boiler from power by shutting off the emergency
switch or disengaging the heating system circuit breaker.
▶Drain the boiler.
1. Remove the safety clip from the dummy plug in the supply pipe.
2. Pull off the dummy plug and place with the boiler documentation.
▶ Ensure the O-ring remains in place on the pipe.
▶ Lubricate the O-ring.
Fig. 23 Installing a LWCO device - removing dummy plug
▶ Screw the LWCO as far as possible into LWCO adapter located in the
boiler accessory kit. Follow the Hydrolevel Safgard 1100
instructions.
Fig. 24 Installing a LWCO device - LWCO adapter
1. Push the adapter with the LWCO onto the pipe
2. Secure with the clip
Fig. 25 Installing a LWCO device – securing with a clip
▶ Connect the wires of the LWCO ( chapter 7.4, page 48).
If other LWCO devices are to be used, they must be
installed external to the boiler.
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The LWCO is positioned upright for technical reasons.
Tests have shown that all air will bleed from the pipe
during commissioning and full functionality is
established.
If fault d3 is displayed when commissioning the boiler,
purge the boiler properly and check the boiler water
pressure.
6720810590-53.1Wo
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