VOKERA Excel 25 - 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.
Excel
High efciency combi boiler
Excel 25 G.C. N° 47-364-12
Excel 29 G.C. N° 47-364-13

VOKERA Excel 25 Specifications

General

Output	25kW
Weight	29 kg
Mounting	Wall-mounted
Domestic Hot Water Output	25 kW
ErP Rating	A
Max Working Pressure	3 bar
Fuel Type	Gas
Boiler Type	Combi
Dimensions	700 x 400 x 280 mm
Type	Combination Boiler

Summary

Things You Should Know

Gas Appliances & Electrical Supply

Legal requirements for safe installation, maintenance, and electrical connection.

Installation

Fitting the Flue System

Gas, Water & Electrical Connections

Procedures for connecting gas, water, and electrical supplies to the appliance.

Commissioning

Initial System Filling & Flushing

Initial Lighting & Pre-Operation Checks

Gas Pressure & Combustion Analysis

Procedures for checking gas pressure and performing combustion analysis.

Servicing

Routine Annual Servicing

Step-by-step guide for performing annual maintenance and checks on the boiler.

Checks, Adjustments and Fault Finding

CO₂ and Gas Valve Adjustment

Detailed procedure for adjusting the gas valve based on CO₂ readings.

Combustion Analysis Test

External Faults & Electrical Checks

LPG Instructions

Converting Appliance Gas Type

Checking CO₂ and Gas Valve

Adjusting gas valve and checking CO₂ for LPG operation.

Benchmark

Gas Boiler System Commissioning Checklist

Form for recording installation and commissioning compliance.

Service Record