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24 Combi
Baxi 24 Combi User Manual
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These instructions include the Benchmark Commissioning Checklist
& Boiler Fiche
and should be left
with the
user for safe keeping.
They must be read in conjunction with the Flue Installation Guide.
United Kingdom
en
600 Combi 2
24 - 30 - 36
For LPG conversion see p.48.
Installation and Service Manual & Boiler Fiche
High-efficiency wall-hung condensing gas boiler
2
Table of Contents
Table of Contents
3
Safety
6
Benchmark
6
Building Regulations and the Benchmark Commissioning Checklist
6
The Benchmark Scheme
6
Installer Notification Guidelines
7
General Safety Instructions
8
Recommendations
8
Specific Safety Instructions
9
Handling
9
Liabilities
10
Manufacturer's Liability
10
Installer's Liability
10
User's Liability
10
About this Manual
11
General
11
Additional Documentation
11
Symbols Used
11
Symbols Used in the Manual
11
Abbreviations/Glossary
11
Technical Specifications
12
Homologations
12
3.1.1 Safety, Performance & Quality
12
Certifications
12
Gas Category
12
Standards
12
Technical Data
13
Technical Information
13
Features of the Temperature Sensors
16
Dimensions and Connections
16
Electrical Diagram
18
Description of the Product
19
General Description
19
Operating Principle
19
Air-Gas Adjustment
19
Combustion
19
Heating and Domestic Hot Water Production
19
Control Panel Description
21
Description of the Control Panel
21
Contents of the Package
21
Accessories & Options
21
Before Installation
22
Installation Standards and Rules
22
Installation Requirements
22
Gas Supply
22
Electrical Supply
22
Hard Water Area
23
Bypass
23
System Control
23
Treatment of Water Circulating Systems
23
Showers
24
Expansion Vessel (CH Only)
24
Safety Pressure Relief Valve
24
Flow Rate/Head at the Plate Characteristics
25
Choice of the Location
26
Location of the Boiler
26
Bath and Shower Rooms
26
Ventilation
27
Condensate Drain
27
Clearances
29
Flue/Chimney Location
29
Horizontal Flue/Chimney Systems
31
Flue/Chimney Trim
34
Terminal Guard
34
Flue/Chimney Deflector
34
Flue/Chimney Accessories
34
Data Plate and Boiler Service Level
35
Transport
35
Unpacking and Initial Preparation
36
Unpacking
36
Initial Preparation
37
Connecting Diagrams
37
Filling Information
37
Domestic Hot Water Circuit
38
Installation
39
General
39
Assembly
39
Fitting the Pressure Relief Discharge Pipe
39
Connecting the Condensate Drain
40
Air Supply/Flue Gas Connection
40
Connecting the Flue/Chimney
40
Electrical Connections
42
Accessing the Electrical Connections
42
Connecting the Room Thermostat
42
Service Connection (SERVICE)
43
Connecting on Wall Outdoor Sensor
43
Connecting the Outside Sensor
43
Identifying Label
43
Filling the Installation
44
Flushing the System
44
Filling the Condensate Trap
44
Draining the Installation
44
Commissioning
45
General
45
Checklist before Commissioning
45
Commissioning Procedure
45
Gas Settings
46
Checking the Working Gas Inlet Pressure and Gas Rate
46
Combustion Parameters
46
Service Settings
50
Calibrating the Gas Valve
51
Final Instructions
52
Handover
52
Operation
53
Use of the Control Panel
53
Browsing the Menus
53
Running the Automatic Detection Function
53
Information Menu Display
53
Counter Menu Display
53
Start-Up
54
Procedure for First Start-Up
54
Changing the Heating Flow Temperature
54
Changing the Domestic Hot Water (DHW) Temperature
54
Shutdown
55
Switching off the Heating and Domestic Hot Water (DHW)
55
Degassing Function
55
Frost Protection
55
Settings
56
Accessing the Settings
56
List of Parameters
56
Resetting Factory Settings
57
Setting the Parameters
57
Setting the Heating Curve
57
Reading out Measured Values
58
Statuses and Sub-Statuses
59
Reading Counters
61
10 Maintenance
62
General
62
Maintenance Message
63
Service Notification
63
Resetting the Displayed Maintenance Message
63
Resetting the Upcoming Maintenance Message
64
Checking the Water Pressure
64
Checking the Expansion Vessel
64
Checking the Flue Gas Discharge and the Air Supply
65
Checking the Combustion
65
Checking the Automatic Air Vent
65
Cleaning the Siphon
65
Checking the Burner and Cleaning the Heat Exchanger
66
Water Unit
67
10.3.10 Removing Limescale
67
Specific Maintenance Operations
68
Detection/Ignition Electrode Replacement
68
Dismantling the Water-Water Exchanger
68
10.4.5 Replacing the 3-Way Valve
69
Pump Motor Replacement
71
10.4.11 Replacing the Expansion Vessel
71
Replacing the PCB
71
11 Troubleshooting
72
Temporary and Permanent Faults
72
Error Codes
72
12 Decommissioning
77
Disassembly
77
Recommissioning
77
13 Disposal
78
Disposal and Recycling
78
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Baxi 24 Combi Specifications
General
Type
Combi Boiler
Output
24 kW
Efficiency Rating
A
Fuel Type
Natural Gas
Flow Rate
9.8 l/min
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