Riello VOKERA VISION PLUS 25C User Manual

Users Instructions
Installation &
Servicing
Instructions
THESE INSTRUCTIONS
TO BE RETAINED
BY USER
Vokèra is a licensed member of the Benchmark scheme
which aims to improve the standards of installation and
commissioning of domestic hot water systems in the UK.
VISION PLUS
High efciency combi boiler
VISION PLUS 25 C G.C. N° 47-364-52
VISION PLUS 30 C G.C. N° 47-364-53

Riello VOKERA VISION PLUS 25C Specifications

General

Boiler Type	Combi
Type	Combi
Fuel Type	Gas
Fuel	Natural Gas
Mounting	Wall Mounted
Output	25 kW
Flow Rate	10.2 L/min
Weight	32 kg
Warranty	5 years
Domestic Hot Water Output (kW)	25 kW
Efficiency Rating	A Rated
Efficiency	93%

Summary

1A THINGS YOU SHOULD KNOW

1.1A GAS APPLIANCES

Ensures compliance with Gas Safety (Installation and Use) Regulation (UK).

1.2A ELECTRICAL SUPPLY

Appliance must be correctly connected to the electrical supply.

1.9A CONTROL PANEL

Details the boiler's control panel, LCD display, and icons.

2A GETTING STARTED

2.3A OPERATING MODE

How to change the operating status: WINTER, SUMMER, or OFF.

2.3.4A ADJUSTING THE HEATING WATER TEMPERATURE WITHOUT AN OUTDOOR TEMPERATURE SENSOR CONNECTED

How to set the heating water temperature when no outdoor sensor is fitted.

2.3.5A ADJUSTING THE HEATING WATER TEMPERATURE WITH AN OUTDOOR TEMPERATURE SENSOR CONNECTED

How to adjust heating temperature with an outdoor sensor.

2.3.6A ADJUSTING THE DOMESTIC HOT WATER TEMPERATURE

How to adjust the domestic hot water temperature using the control panel.

2.3.7A SAFETY STOP

2.3.8A RESET FUNCTION

2.5A BOILER FAULT CODES

List of boiler fault codes, their faults, and alarm types.

4A WHAT IF...

4.1A WHAT IF I SUSPECT A GAS LEAK

Immediate actions to take if a gas leak is suspected.

DESIGN PRINCIPLES AND OPERATING SEQUENCE

2.3 MODE OF OPERATION (HEATING)

Explains how the boiler operates when a heating request is received.

2.4 MODE OF OPERATION (HOT WATER)

Explains how the boiler operates when a domestic hot water request is received.

2.5 SAFETY DEVICES

Lists the safety devices ensuring safe operation of the appliance.

2.6 TECHNICAL DATA

2.8 HOW TO FREE THE PUMP

3 GENERAL REQUIREMENTS (UK)

3.3 GAS SUPPLY

Requirements for the gas supply, meter, and pipework installation.

3.4 FLUE SYSTEM

Guidelines for the correct installation and positioning of the flue system.

3.7 ELECTRICAL SUPPLY

Requirements for the electrical supply, fuse, and connection method.

4 INSTALLATION

4.1 PREPARATION FOR MOUNTING THE APPLIANCE

Steps for preparing the mounting surface and marking bracket positions.

4.2 FITTING THE FLUE

Instructions for fitting the flue system, including concentric and rear flue options.

4.2.1 CONCENTRIC HORIZONTAL FLUE

4.2.2 FITTING THE TELESCOPIC HORIZONTAL FLUE KIT

4.2.3 FITTING THE HORIZONTAL FLUE KIT

4.3 CONNECTING THE GAS AND WATER (FIG. 25)

Connecting the gas and water service valves to the appliance.

4.3.1 GAS

Connecting the 15mm gas service valve.

4.3.2 FLOW & RETURN

Connecting the 22mm service valves for flow and return connections.

4.4 ELECTRICAL CONNECTIONS

Connecting the boiler to the electrical supply via a fly-lead or direct connection.

4.5 CASING REMOVAL

4.7 CONNECTING THE MAINS (230V) INPUT

Connecting the 230V mains supply cable to the appliance.

5 OPERATION

5.2 CONTROL PANEL

Description of the control panel's LCD display and button functions.

5.3 SETTINGS MENU TREE STRUCTURE

Overview of the programmable parameters and their access levels.

5.4 STARTING THE BOILER

Steps to follow before supplying power and starting the boiler.

5.5 BOILER CONFIGURATION

Accessing and configuring boiler settings via menus P1, P3, and P4.

5.6 FIRST COMMISSIONING

Steps required before supplying gas and electrical supply to the appliance.

5.8 OPERATING STATUS

How to change the boiler's operating status between WINTER, SUMMER, and OFF.

5.8.4 ADJUSTING THE HEATING WATER TEMPERATURE WITHOUT AN OUTDOOR TEMPERATURE SENSOR CONNECTED

How to set the heating water temperature when no outdoor sensor is fitted.

5.8.5 ADJUSTING THE HEATING WATER TEMPERATURE WITH AN OUTDOOR TEMPERATURE SENSOR CONNECTED

Adjusting heating temperature when an outdoor sensor is connected.

5.8.6 ADJUSTING THE DOMESTIC HOT WATER TEMPERATURE

Adjusting domestic hot water temperature via the control panel.

5.8.7 SAFETY STOP

5.8.8 RESET FUNCTION

6 COMMISSIONING

6.1 GAS SUPPLY INSTALLATION

Inspection of gas supply, testing for tightness and purging.

6.4 INITIAL FILLING OF THE SYSTEM

Steps for initially filling the heating system and venting air.

6.5 INITIAL FLUSHING OF THE SYSTEM

Procedure for flushing the heating system both cold and hot.

6.6 PRE-OPERATION CHECKS

Essential checks before attempting initial lighting of the appliance.

6.8 CHECKING GAS PRESSURE AND COMBUSTION ANALYSIS

Procedure for checking gas pressure and performing a combustion analysis.

7 SERVICING INSTRUCTIONS

7.1 GENERAL

Ensuring continued safe operation and the importance of genuine spare parts.

7.2 ROUTINE ANNUAL SERVICING

Checklist for routine annual servicing of the appliance.

7.4 COMPONENT REMOVAL PROCEDURE

7.6 PUMP ASSEMBLY (FIG. 31)

7.7 SAFETY VALVE (FIG. 32)

7.8 LOWER AUTOMATIC AIR RELEASE VALVE (FIG. 31)

7.9 WATER PRESSURE TRANSDUCER (FIG. 33)

7.10 FLOW THERMISTOR (FIG. 4 - POS. 21)

7.11 RETURN THERMISTOR (FIG. 4 - POS. 23)

7.12 PRINTED CIRCUIT BOARD (FIG. 34)

7.13 GAS VALVE (FIG. 35)

Procedure for replacing the gas valve unit.

7.14 ELECTRODES (FIG. 36 - FIG. 37)

7.15 FLUE FAN & MIXER (FIG. 37 - FIG. 38)

7.16 BURNER (FIG. 37)

7.17 MAIN HEAT EXCHANGER (FIG. 38)

Procedure for removing and replacing the main heat exchanger.

7.18 AUTOMATIC BY-PASS & DHW NON-RETURN (FIG. 39)

7.19 EXPANSION VESSEL REMOVAL (FIG. 40)

7.20 CONDENSE TRAP REMOVAL (FIG. 41)

7.21 FLUE COLLECTOR REMOVAL (FIG. 42)

7.21.1 DHW FLOW RESTRICTOR (FIG. 43)

7.21.2 DHW FLOW SWITCH (FIG. 43)

7.21.3 VALVE ACTUATOR (FIG. 44)

7.21.4 DHW THERMISTOR (FIG. 33)

7.21.5 DIVERTER VALVE ASSEMBLY (FIG. 44)

7.22 REPLACING INTERFACE

7.23 REPLACING PCB OR INTERFACE

8 CHECKS, ADJUSTMENTS AND FAULT FINDING

8.1 CHECKING APPLIANCE OPERATION

Ensuring continued safe operation through commissioning procedures.

8.2 APPLIANCE MODES OF OPERATION

8.2.2 ON-BOARD FUNCTIONS

8.2.3 HEATING MODE

8.2.4 DHW MODE

8.3 CHECKING THE CO, AND ADJUSTING THE GAS VALVE

Procedure for checking gas pressure and performing a combustion analysis.

8.4 CHECKING THE EXPANSION VESSEL

8.5.1 INSTALLATION FAULTS

8.6 ELECTRICAL CHECKS

Essential electrical checks to be performed by a qualified person.

8.6.1 EARTH CONTINUITY TEST

Testing earth continuity of the appliance and cable connections.

8.6.2 SHORT CIRCUIT CHECK

Testing for short circuits between Live, Neutral, and Earth connections.

8.6.3 POLARITY CHECK

Performing voltage tests to check electrical polarity.

8.6.4 REVERSED POLARITY OR SUPPLY FAULT

8.6.5 RESISTANCE TO EARTH CHECK

Checking the resistance to earth of the appliance.

8.7 FAULT FINDING

Procedure for fault finding, including electrical checks and external control disconnection.

8.9 ADJUSTMENTS

Procedures for adjusting maximum/minimum power settings and fan speeds.

8.10 GAS VALVE CALIBRATION

8.11 RANGE RATED

8.12 SETTING THE THERMOREGULATION

8.13 LIGHTS AND FAULTS

Explanation of display icons, fault codes, and reset procedures.

8.14 BOILER FAULT CODES

10 LPG INSTRUCTIONS

10.2 TECHNICAL DATA

10.3 GAS CONVERSION

Procedure for converting the boiler from natural gas to LPG.

COMMISSIONING: CO AND COMBUSTION RATIO CHECK

Benchmark Commissioning & Warranty Validation Service Record

GAS BOILER SYSTEM COMMISSIONING CHECKLIST & WARRANTY VALIDATION RECORD

SERVICE & INTERIM BOILER WORK RECORD

Vokèra Warranty Terms and Conditions

RANGE RATED - EN 15502