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CHAPTER-1 GENERAL CONDITIONS & INTRODUCTION
1.1. Delivering the Boiler to the User ..................................................................................................5
1.2. Recommendations on Using the Boiler Economically .........................................................7
1.3. Points which Users must Pay Attention for Terms of Warranty ......................................7
12 Reasons to Choose Viwa Boiler ...............................................................................................8
Technical Data ....................................................................................................................................10
CHAPTER-2 CONTROL OF THE INSTALLATION
2.1 Measurements and Weight .............................................................................................................11
2.2 Heating and Domestic Hot Water Systems ............................................................................ 12
2.3. Filling the Flusher for Condensation Line ............................................................................... 12
2.4. Flue Pipe Set of Exhaust Gas and Connection of Accessories ....................................... 12
2.5. Flue Accessories, Measurements and Weight ....................................................................... 15
2.6. Installation in Partially Preserved Outsides ............................................................................ 16
2.7. Electrical Connections .................................................................................................................... 16
2.8. Optional Control Devices: Room Thermostat,
Outside Temperature Sensor and Others ............................................................................... 16
2.9. Technical Data .................................................................................................................................... 16
2.10. Usage of Outside Temperature Sensor (Optional) .............................................................. 18
2.11. Installation Rules of Hydraulic System ..................................................................................... 18
2.12. Water Purification ............................................................................................................................. 19
2.13. Electrical Connection Diagram (HDIMS 50-Motherboard ...............................................20
90 - 150 Connection Diagram of Condensing Boiler Terminal ....................................... 21
CHAPTER-3 BOILER AND PARAMETER SETTINGS
3.1. Control Panel ..................................................................................................................................... 22
3.2. Display Symbols ............................................................................................................................... 22
3.3. On-Off Mode ...................................................................................................................................... 24
3.4. Temperature Adjusting of Heating and Domestic Hot Water ........................................ 25
3.5. Adjusting Info Menu ........................................................................................................................ 26
3.6. Adjusting Technical Service Parameter Menu ...................................................................... 29
3.7. Technical Service Parameter Menu ...........................................................................................30
3.8. Adjusting Flue Mode....................................................................................................................... 34
3.9. Resetting ............................................................................................................................................. 34
CHAPTER-4 ERRORS AND FAULT SOLUTIONS
4.1. Overheating ....................................................................................................................................... 38
4.2. No Display on Screen ..................................................................................................................... 38
4.3. Flame Burns Before Gas Valve Opens ..................................................................................... 39
4.4. Low Water Pressure ........................................................................................................................ 39
4.5. Flame Loss ..........................................................................................................................................40
4.6. Fan Fault. .............................................................................................................................................40
4.7. Flow NTC Sensor Fault ................................................................................................................... 41
4.8. Return NTC Fault .............................................................................................................................. 42
4.9. (DHW) Boiler NTC Sensor Fault ................................................................................................. 43
4.10. Exhaust Gas-Flue Gas-NTC Sensor Fault ...............................................................................44
4.11. Outside Temperature Sensor Fault ........................................................................................... 45
4.12. Heating Doesn’t Work / (DHW) Boiler Works .....................................................................46
CHAPTER-5 MAINTENANCE-REPAIR & CONTROL
5.1. Interior Appearance and Components ................................................................................... 47
5.2. Removing the Boiler .......................................................................................................................48
5.3. Boiler Components .........................................................................................................................49
5.4. Removing and Cleaning Burner .................................................................................................50
5.5. Combustion Performance Control ............................................................................................. 51
5.6. Adjustments on Gas Valve Boiler Screen ................................................................................ 51
5.7. Removal and Maintenance of Burner ...................................................................................... 52
5.8. Fan Unit................................................................................................................................................54
5.9. Water Pressure Sensor. ..................................................................................................................54
5.10. PCB (Printed Circuit Board-HDIMS-50 ................................................................................... 55
5.11. Gas Valve ............................................................................................................................................. 56
5.12. Flow and Return NTC Sensors .................................................................................................... 58
5.13. Safety Limit Thermostat ...............................................................................................................60
5.14. Flue Gas (Exhaust Gas) Sensor ................................................................................................... 61
5.15. Ignition-Ionized Transformer ....................................................................................................... 62
5.16. Ignition Electrode ............................................................................................................................ 62
CHAPTER-6 INSTALLATION AND SETTINGS OF CASCADE SYSTEM
6.1. What is Cascade System............................................................................................................... 65
6.2. Is Cascade System More Expensive Than Other Systems ............................................... 65
6.3. How Does Condensing Cascade System Operate .............................................................. 65
6.4. Viwa Cascade Installation Settings ........................................................................................... 65
6.5. 90-150 kW Cascade System Installation ................................................................................66
6.6. MLC-30.Cascade Zone Management Card and Places of Usage .................................. 67
6.7. Direct Heating with Using MLC-30 + MLC-30 + Two 3-way Circuit Connection ....68
6.8. Direct Heating Circuit Connection with Using MLC-30 + MLC-30 ...............................69
6.9. Direct Heating with Using MLC-30 + MLC-30+ One 3-way Circuit Connection .....69
6.10. Adjusting Cascade Parameter Menus ......................................................................................70
6.11. Control Accessories for Cascade System .................................................................................71
6.11.2. Control Accessories for Cascade System (Continuation) .............................................72
CHAPTER-7 VIWA DIAGRAMS FOR INSTALLATION OF
BOILER HEATING SYSTEM
7.1. Diagram Samples for Installation with Single Boiler ..........................................................73
7.1.2. Single Boiler (1 High Temperature Zone) + System Diagram for DHW Boiler ..........74
7.1.3. Single Boiler (1 High + 1 Low Temperature Zone) +
System Diagram for DHW Boiler / Optional MLC 30 .........................................................75
7.1.4. Cascade System (1 High Temperature Zone) + Diagram for DHW Boiler ................. 76
7.1.5. Cascade System (1 High + 1 Low Temperature Zone) +
System Diagram for DHW Boiler / Optional MLC 30 .........................................................77
7.1.6. Cascade System (3 High Temperature Zone) +
System Diagram for DHW Boiler / Optional MLC 30 ........................................................ 78
7.1.7. System Diagram for 1 High + 1 Low Temperature Zone .................................................... 79
7.1.8. Single Boiler (1 High Temperature Zone) + System Diagram for DHW Boiler .........80
CHAPTER-8 CASCADE SYSTEM DIAGRAMS UP TO 15 BOILERS
WITH BOILER MOTHERBOARD AND RVS ADDITIONAL
CASCADE CONTROL UNIT
Cascade System: 1 High Temperature Zone + DHW Boiler Heating System Diagram ... 82
Cascade System: 1 Low Temperature Zone + DHW Boiler Heating System Diagram .... 83
Cascade System: 3 Low Temperature Zone + DHW Boiler Heating System Diagram ...84
Commissioning the Boiler and Control Checklist ......................................................................... 85
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