REMEHA Calenta 25s User Manual

Name: REMEHA Calenta 25s
Brand: REMEHA
Rating: 4 (1 reviews)

100 pages

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Netherlands

High-efficiency wall-hung condensing gas boilers

Calenta 25s - 28c - 35s - 40c

Installation and

Service Manual

7600585-01

Default Chapter3
- Table of Contents3
Introduction8
Symbols Used8
Abbreviations8
General8
- Manufacturer's Liability8
- Installer's Liability9
Homologations9
- Certifications9
- Equipment Categories11
- Additional Directives11
- Factory Test11
Safety Instructions and Recommendations12
Safety Instructions12
Recommendations12
Technical Description14
General Description14
Main Parts14
Operating Principle15
- Gas/Air Setting15
- Combustion16
- Heating and Domestic Hot Water Production16
- Control System16
- Adjustment16
- Regulation of the Water Temperature17
- Protection against a Shortage of Water17
- Maximum Temperature Protection17
- Skeleton Diagrams18
- Shunt Pump18
- Water Flow Rate19
Technical Specifications19
Installation22
Regulations Governing Installation22
Package List22
- Standard Delivery22
- Accessories23
Choice of the Location24
- Data Plate24
- Location of the Boiler24
- Ventilation25
- Main Dimensions26
Positioning the Boiler27
Alternatives for Hydraulic Connections28
- Connection of the Underfloor Heating28
- Connection of a Solar Hot Water Tank28
- Connection of an Independent Hot Water Tank29
- Geyser Use30
- Solo Use31
Hydraulic Connections31
- Flushing the System31
- Connection of the Heating Circuit32
- Hydraulic Connection of the Water Circuit for Domestic Use33
- Connecting the Expansion Vessel33
- Connecting the Condensate Discharge Pipe33
Gas Connection34
Connections for the Air and Exhaust Pipes34
- Classification34
- Outlets35
- Lengths of the Air/Flue Gas Pipes36
- Specific Air/Flue Gas Applications38
- Additional Directives38
- Air/Exhaust Adapter39
- Connection of the Combustion Gas Exhaust Pipe40
- Connection of the Air Intake Pipe40
Electrical Connections41
- Control Unit41
- Recommendations42
- Standard Control PCB43
- Connecting the Room Thermostat44
- Connecting the Outside Temperature Sensor45
- Connect Frost Protection45
- Connecting the Calorifier Sensor/Thermostat46
- Pc/Laptop Connection47
- Shutdown Input47
- Release Input47
4.10 Optional Electrical Connections48
- Connection Options for the 0-10 V Control PCB (IF-01)48
- Connection Possibilities for the PCB (SCU- S02)49
4.11 Electrical Diagram52
4.12 Filling the System53
- Water Treatment53
- Filling the Siphon53
- Filling the System54
Commissioning55
Control Panel55
- Functions of the Keys55
- Meaning of the Symbols on the Display55
Check Points before Commissioning56
- Preparing the Boiler for Commissioning56
- Gas Circuit57
- Hydraulic Circuit57
- Electrical Connections57
Commissioning the Boiler57
Gas Settings59
- Adapting to Another Gas Type59
- Setting the Air/Gas Ratio (Full Load)59
- Setting the Air/Gas Ratio (Part Load)61
- Basic Setting for the Gas/Air Ratio62
Checks and Adjustments after Commissioning62
- Finalizing Work62
Reading out Measured Values63
- Reading the Various Current Values63
- Readout from the Hour Counter and Percentage of Successful Starts64
- Status and Sub-Status65
Changing the Settings66
- Parameter Descriptions66
- Modification of the User-Level Parameters68
- Modification of the Installer-Level Parameters69
- Setting the Maximum Heat Input for Central Heating Operation70
- Return to the Factory Settings71
- Carrying out an Auto-Detect72
- Setting the Manual Mode72
- Setting the Legionella Protection Function72
Switching off the Boiler73
Installation Shutdown73
Frost Protection73
Switching off the Central Heating74
Shutting down Domestic Hot Water Production74
Checking and Maintenance75
Maintenance Message75
Preventive Maintenance with Automated Service Message75
- Resetting the Automatic Maintenance Message76
- Dealing with the Next Maintenance Message and Starting the New Maintenance Period76
Standard Inspection and Maintenance Operations77
- Checking the Hydraulic Pressure77
- Checking the Ionization Current77
- Checking the Transfer Capacity77
- Checking the Tightness of the Flue Gas Evacuation and Air Inlet Connections78
- Checking Combustion78
- Checking the Automatic Air Vent79
- Checking the Safety Valve79
- Checking the Siphon79
- Checking the Burner and Cleaning the Heat Exchanger80
Specific Maintenance Operations81
- Replacing the Ionization/Ignition Electrode81
- Cleaning the Plate Exchanger (Domestic Hot Water End) and the Water Filter Cartridge81
- Replacing the 3-Way Valve84
- Replacing the Non-Return Valve85
- Assembling the Boiler86
Troubleshooting87
Error Codes87
Shutdowns and Lock-Outs90
- Blockage90
- Blocking90
Error Memory92
- Error Readout Memorised93
- Deletion of the Error Display94

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REMEHA Calenta 25s Specifications

General

Output	25 kW
Efficiency	Up to 98%
Weight	37 kg
ErP Rating	A
Mounting	Wall-mounted
ErP Heating	A
ErP Water	A
Fuel Type	Natural Gas
Boiler Type	Combi
Flow Rate	10.2 l/min
Fuel	Natural Gas

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Table of Contents

Questions and Answers:

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