Table of Contents
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Installation and Servicing
E-Tec Plus 28NX, 33NX and 38NX
Wall Mounted, Fan Assisted, Room Sealed,
Gas Fired, High Efficiency Condensing Combination Boiler
These instructions have been carefully prepared but we reserve the right
to alter the specification at any time in the interest of product improvement.
© Alpha Therm Limited 2023.
Instructions
For Technical help or for Service call ...
ALPHA HELPLINE Tel: 0344 871 8764
website: www.alpha-innovation.co.uk
Nepicar House, London Road,
Wrotham Heath, Sevenoaks,
Kent TN15 7RS
Alpha E-Tec Plus 28NX
Alpha E-Tec Plus 33NX
Alpha E-Tec Plus 38NX
Leave these instructions with the User
G.C. No. 47 532 89
G.C. No. 47 532 90
G.C. No. 47 532 91
Part No. 1.048200 rev. ST.006992/002
0923/D468
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Table of Contents
Related Manuals for Alpha E-Tec Plus 38NX
Summarization of Contents
1 Introduction
IMPORTANT
Key warnings and legal obligations regarding boiler installation and warranty.
2 Safety Symbols and Information
Personal Protective Equipment
Details on required safety gear for handling the appliance.
2.1 Electrical Supply
Attention: Electrical Connection Requirements
Crucial safety notes for connecting the boiler to the mains electrical supply.
3 Technical Data
3.1 Technical Performance Data - Natural Gas
Detailed technical specifications for natural gas operation.
3.2 Technical Performance Data - LPG
Detailed technical specifications for LPG propane gas operation.
3.3 Flue Lengths
Information on required flue lengths and extensions for installation.
3.4 Pump
Details on the boiler's variable speed pump and its operating modes.
3.6 Electrical Connections
Appliance Must Be Earthed
Mandatory safety requirement for earthing the appliance.
4 General Boiler Information
4.1 Gas Supply
Requirements for the gas supply and installation testing.
4.2 Air Supply
Information on the boiler's air supply and ventilation requirements.
4.3 Flue System
Guidelines for installing the flue system, including length and bends.
4.6 Central Heating System
System Volume and Expansion Vessel
Details on system volume, expansion vessel capacity, and pressure gauge.
4.7 Filling the Central Heating System
Procedure for filling and pressurising the central heating system.
5 Installation
5.1 Unpacking
Instructions for unpacking the boiler and its components.
5.2 Clearances Required
Minimum clearances needed around the boiler for installation and servicing.
5.3 Prepare the Wall
Steps for preparing the wall for boiler mounting and flue installation.
5.4 Fit the Boiler
Instructions for safely fitting the boiler onto the mounting bracket.
5.5 Connect the Pipework
Guidance on connecting the central heating, DHW, and condensate pipework.
5.6 Fit the Flue Turret
Procedure for fitting the flue turret to the boiler.
5.7 Fit the Flue - Push Fit Easy-Flue
Detailed instructions for fitting the push-fit flue system.
5.8 Reducing the Flue
Guidance on how to reduce the flue length if required.
5.9 Extending the Flue
Instructions for extending the flue assembly using extension kits.
5.7b Fit the Flue - Clamped Flue
Instructions for fitting the clamped flue system.
5.9b Extending the Flue
Instructions for extending the clamped flue system.
5.10 Fit Plume Management Components
Optional components for managing flue gas plume emission.
5.11 Connect the Mains Supply
Steps for connecting the boiler to the mains electrical supply.
5.12 Fitting Boiler Controls
Guidance on installing optional Alpha and compatible third-party controls.
6 Commissioning
6.1 Fill the System
Procedure for filling and venting the central heating system.
6.2 Control Panel Features
Overview of the boiler's control panel buttons and their functions.
6.3 Test for Gas Tightness and Purge the Supply
Essential safety checks for gas supply integrity.
6.5 Initial Lighting
Step-by-step guide for the initial lighting and startup of the boiler.
6.6 Boiler Operation
Explanation of how the boiler operates in different modes.
6.7 Checking the Combustion
Procedure for checking and recording combustion performance (CO2 levels).
6.8 Final Commissioning
Final steps to ensure the system is correctly commissioned and balanced.
6.10 User Information
Important advice for the end-user on boiler operation and maintenance.
6.14 Programming the PCB
Guide to accessing and modifying boiler parameters via the control PCB.
6.15 Password Protected Special Functions
Accessing and using advanced functions requiring a password.
6.16 Screed Heater Function
Procedure for activating the screed heating function for new floor systems.
6.17 Maintenance Function
Function to activate specific boiler operating devices for testing.
6.18 Automatic Vent Function
Function for automatic air venting of heating systems.
6.19 Flue Installation Function
Function to test the fan for flue installation checks.
6.20 Solar Panels Coupling Function
Function for integrating solar thermal systems with the boiler.
6.21 Pump Anti-Block Function
Function to prevent the pump from locking up due to inactivity.
6.23 Antifreeze Function
Automatic function to protect the boiler from freezing.
7 Routine Servicing
Competence to Carry Out Combustion Performance Check
Requirements for engineers performing combustion analysis.
Combustion Check
Procedure for measuring and recording combustion performance.
7.2 Casing Removal
Steps for safely removing the boiler casing panels for servicing.
7.4 Cleaning the Electrodes, Burner and Fan
Maintenance tasks for cleaning key internal components.
7.5 Cleaning the Heat Exchanger
Procedure for cleaning the heat exchanger and condensate trap.
8 Component Replacement
8.1 General Access
Steps to gain access to internal components for replacement.
8.2 Draining the Boiler
Procedure for safely draining the boiler before component replacement.
8.3 Ignition and Sensing Electrode
Instructions for replacing the ignition and sensing electrode.
8.4 Main Burner
Procedure for replacing the main burner assembly.
8.5 Fan
Instructions for replacing the boiler fan unit.
8.7 Fuse
Procedure for replacing the fuse on the PCB.
8.8 PCB
Instructions for replacing the main printed circuit board (PCB).
8.9 Gas Valve
Procedure for replacing the boiler's gas valve.
8.11 Condensate Trap
Instructions for removing and replacing the condensate trap.
8.13 Primary Heat Exchanger
Procedure for replacing the primary heat exchanger.
8.20 DHW Heat Exchanger
Instructions for replacing the domestic hot water heat exchanger.
8.21 Diverter Valve Motor
Procedure for replacing the diverter valve motor.
8.24 Combustion Chamber Insulation
Instructions for replacing combustion chamber insulation panels.
9 Wiring Diagram
9.1 Illustrated Wiring Diagram
Diagram showing electrical connections for the boiler components.
10 Error Codes and Fault Finding
10.1 Carry Out Initial Fault Finding Checks
Preliminary checks to perform when a fault is suspected.
10.2 Error Codes and Fault Finding
Table of error codes, causes, and boiler status/solutions.
12 Energy Classification
12.1 Technical Parameters for Mixed Boilers
Technical data related to energy efficiency according to Regulation 811/2013.
12.2 Product Data Sheet
Energy performance data sheet for the boiler models.
12.3 Facsimile for Filling in Room Heating System Assembly Chart
Form for calculating and recording room heating system energy efficiency.
12.4 Facsimile for Filling in Domestic Hot Water Production System Assembly Chart
Form for calculating and recording DHW system energy efficiency.
12.5 Domestic Hot Water Production System Assembly Chart
Data entry chart for domestic hot water system energy efficiency.
12.7 Room Heating System Assembly Chart
Data entry chart for room heating system energy efficiency.
9 Important Notes
Boiler Location and Clearances
Important notes on boiler placement and required clearances.
Flue Terminal and Mains Failure
Notes on flue terminal obstruction and behaviour during mains failure.
Cleaning and Servicing
Guidance on cleaning the boiler and the importance of routine servicing.
Gas Leak and Electrical Supply
Safety procedures for gas leaks and electrical supply requirements.
10 Optional Boiler Controls
Information on compatible optional controls for the boiler.
2 Operating the Boiler
Boiler Controls Location and Operation
Description of the boiler's control panel and basic operation.
Troubleshooting Lock-out Faults
Instructions for clearing lock-out faults using the RESET button.
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