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Italtherm CITY CLASS 25 K User Manual

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CITY CLASS
Manual
SERVICE
ENG
25 K - 30 K - 35 K
25 KR - 35 KR
Green Heating Technology
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Italtherm CITY CLASS 25 K Specifications

General IconGeneral
Gas TypeNatural Gas/LPG
FuelGas
Max. Heating Output25 kW
DHW Output25 kW
EfficiencyUp to 98%
Energy Efficiency ClassA
NOx Class5
Heat Exchanger MaterialStainless Steel
Control SystemElectronic
Weight32 kg
Modulation1:5
Water pressure0.5 - 3 bar
Max working temperature80 °C
IgnitionElectronic
Flue gas outlet diameter60/100 mm
Power supply230V/50Hz
Protection ratingIPX5D
TypeCondensing
Dimensions (HxWxD)700x400x mm

Summary

PCB Configuration and Reset

PCB Total Reset Procedure

Resets the PCB to factory settings, requiring reconfiguration.

Boiler PCB Configuration

Steps to configure the PCB for the correct boiler model after reset or replacement.

First Ignition and Gas Conversion

First Ignition Checklist

Comprehensive checks for installation, flues, hydraulic, and gas systems before initial ignition.

Field Service Calibration Procedures

Component Replacement Calibration

Outlines calibration steps (automatic, manual, combustion check) for replaced boiler components.

Field Calibration Sequence

Details the sequence of operations for boiler calibration, including gas type setting and combustion tests.

Electrical Wiring Diagram (K Model)

Electrical Wiring Diagram (KR Model)

Heating System Filling and Pressurizing

System Filling Procedure

Step-by-step guide for filling and pressurizing the heating system to the correct pressure.

Heating System Draining

Component Dismounting and Mounting

Main Exchanger Service

Main Exchanger Dismounting and Mounting

Procedures for dismounting, cleaning, and mounting the main exchanger, including checks.

Gas Valve Service and Calibration

Gas Valve Dismounting and Mounting

Provides steps for removing and installing the gas valve, including calibration.

Automatic Gas Valve Calibration

Automatic Calibration Procedure

Detailed steps for performing automatic gas valve calibration using the control panel.

Automatic Gas Valve Calibration (Cont.)

Manual Gas Valve Calibration

Manual Calibration Procedure

Detailed steps for performing manual gas valve calibration using the control panel.

Manual Gas Valve Calibration (Cont.)

Calibration Process Monitoring

Explains how to monitor the manual calibration process and interpret displayed values.

Accessing Boiler Parameters

Parameter Navigation and Selection

Guides on how to navigate and select parameters using the control panel buttons.

Storing Parameter Values

Explains how to store changed parameter values and exit the parameter access mode.

General Use Parameters

Advanced Parameters

Configuration and Info Menu

Error History and Diagnostics

Accessing Error Log

Instructions on how to access the boiler's error history using control panel buttons.

Interpreting Error Codes

Explains how to read the error codes and identify the chronological order of errors.

Troubleshooting Error Codes

Error Codes E01-E17

Lists common error codes, their descriptions, and suggested solutions for initial errors.

Error Codes E24-E50

Lists error codes related to plant, electrical supply, and probe issues with troubleshooting advice.

Error Code E74

Details the error code for Antilegionella function issues and related parameters.

Service Function Management

Parameter Values and Settings

Technical Data (K Models)

Technical Data (Electrical and Gas)

Technical Data (KR Models)

Technical Data (Gas Supply KR)

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