Nova Florida VELA COMPACT

Questions and Answers

A
Anne ShepherdJul 30, 2025
What to do if my Nova Florida Boiler is not supplying DHW?
- R
  robleslauraJul 30, 2025
  If your Nova Florida boiler isn't supplying domestic hot water (DHW), several issues could be the cause. Begin by checking the DHW system to ensure the DHW flow meter is working correctly and that there's sufficient pressure and flow rate. Also, inspect the DHW flow meter sensor for faults or disconnections; reconnect or replace it if necessary. A blocked DHW flow meter sensor could also be the problem, so consider replacing it.
L
lopezalexanderAug 4, 2025
Why is the air intake/flue gas exhaust pressure switch not operating in my Nova Florida VELA COMPACT Boiler?
- J
  James ChavezAug 4, 2025
  If the air intake/flue gas exhaust pressure switch (CTFS) in your Nova Florida boiler isn't operating, it could be due to several reasons. Check the air intake/flue gas pressure switch itself and replace it if it's faulty. Also, inspect the silicone pipes of the switch for disconnections or damage; connect or replace them as needed. Ensure that the air intake or flue gas discharge flow is correct. Other potential causes include a faulty fan (replace it) or a faulty PCB (replace it).
R
Rachel AlexanderAug 7, 2025
What to do if the safety thermostat has shut down my Nova Florida VELA COMPACT Boiler?
- C
  Christopher PerezAug 8, 2025
  If the safety thermostat has shut down your Nova Florida boiler, it could be due to a couple of reasons. Check the CH system to ensure that water is flowing correctly, looking for clogged pipes, shut thermostatic valves, or closed system stopcocks. Also, inspect the pump to see if it's blocked or faulty.
K
kylie00Aug 12, 2025
Why has the CH water flow temperature exceeded 85°C in my Nova Florida Boiler?
- F
  Faith CaseAug 12, 2025
  If the CH water flow temperature in your Nova Florida boiler has exceeded 85°C, it indicates inadequate water flow in the system. Check the pump and the CH system to ensure proper circulation.
J
Jason SteeleAug 16, 2025
What to do if the gas valve modulation coil is not working on my Nova Florida Boiler?
- L
  Lisa RobinsonAug 16, 2025
  If the gas valve modulation coil isn't working on your Nova Florida boiler, check the connection between the PCB and the gas valve to ensure it's properly connected and not faulty. If the connection is good, the gas valve modulation coil itself may be faulty and require replacement.
J
Jessica MitchellAug 21, 2025
What to do if the DHW probe is not working on my Nova Florida Boiler?
- K
  Kimberly RamirezAug 21, 2025
  If the DHW probe isn't working on your Nova Florida boiler, check to see if it's disconnected and reconnect it. If the probe is connected, it may be faulty and need replacement.
A
Aaron LongOct 25, 2025
How to fix a Nova Florida Boiler when the burner does not ignite?
- T
  Timothy WilliamsOct 25, 2025
  If the burner on your Nova Florida boiler isn't igniting, several factors could be responsible. First, check for a gas supply failure by verifying the gas pressure and inspecting the gas network stopcock or safety valve. If the gas valve has disconnected, reconnect it. Other potential issues include a faulty gas valve (replace it), a faulty PCB (replace it), or a faulty ignition/flame sensing electrode (replace the electrode). If the burner ignites briefly and then shuts off, check the neutral and phase connection sequence. Also, inspect the ignition/flame detection electrode wire for interruptions and connect or replace if necessary. Ensure the ignition heat input setting isn't too low, and verify the burner setting for correct minimum heat input. Finally, consider replacing the PCB if it...

Summary

1. Instructions for the User

1.1 Control Panel

Details and functions of the boiler's control panel, including LEDs and knobs.

1.2 Operating the Boiler

Step-by-step procedure for switching on and operating the boiler.

1.3 Boiler Shut-down

Guidance on detecting and resolving various boiler shut-down causes indicated by LED status.

1.4 Maintenance

Routine boiler maintenance procedures and recommendations for service.

1.5 Notes for the User

Important advisories for users regarding boiler safety, modifications, and inactivity.

2. Technical Characteristics and Dimensions

2.1 Technical Characteristics

Overview of boiler construction features, user interface, and functional characteristics.

2.2 Dimensions

Detailed physical dimensions and connection points for CTN and CTFS boiler models.

2.3 Hydraulic Layouts

Diagrams illustrating the hydraulic connections and component layout for different models.

2.4 Operating Data

Tables detailing operating parameters like heat input, output, gas pressure, and flow rates.

2.5 General Characteristics

Summary of general technical specifications, consumption, efficiency, and safety ratings.

3. Instructions for the Installer

3.1 Installation Standards

Compliance requirements for boiler installation according to laws and applicable standards.

3.2 Installation

Comprehensive steps for installing the boiler, from packaging to final connections.

3.2.1 Packaging

Details on boiler packaging, included items, and safe handling of materials.

3.2.2 Choosing Where to Install the Boiler

Criteria for selecting an appropriate and safe location for boiler installation.

3.2.3 Positioning the Boiler

Guidance on boiler placement and using the installation template for drilling.

3.2.4 Installing the Boiler

Step-by-step instructions for physically mounting the boiler and connecting pipes.

3.2.5 Boiler Room Ventilation

Specific ventilation requirements for CTN and CTFS boiler models.

3.2.6 Air Intake and Flue Gas Discharge System

Regulations and safety devices for air intake and flue gas discharge systems.

3.2.6.1 Natural Draught Boiler

Requirements for connecting natural draught boilers to a chimney system.

3.2.6.2 Forced Draught Boiler

Configuration of air intake/flue gas ducts for forced draught models, including coaxial and split pipe systems.

3.2.7 Checking Combustion Efficiency

Procedure for checking boiler combustion efficiency for different flue systems.

3.2.7.1 Coaxial Pipe System

Steps to verify combustion performance for coaxial pipe systems.

3.2.7.2 Split Pipe System

Steps to determine combustion performance for split pipe systems.

3.2.8 Gas Mains Connection

Guidelines for connecting the gas supply pipe, including leak testing procedures.

3.2.9 Plumbing Connections

Instructions for connecting central heating and domestic hot water pipes.

3.2.10 Power Mains Connection

Procedure for safely connecting the boiler to the electrical power supply.

3.2.11 Room Thermostat Connection

How to connect an optional room thermostat to the boiler system.

3.3 Loading the System

Step-by-step guide for filling and preparing the central heating system.

3.4 Starting the Boiler

Essential preliminary checks and procedures for initial boiler startup.

3.4.1 Preliminary Checks

List of critical checks required before initial boiler startup.

3.4.2 Switching On and Off

Procedure for switching the boiler on and off as per user instructions.

3.5 Wiring Diagram

Diagram illustrating the electrical connections and components of the boiler's control system.

3.6 Adaptation to Other Gas Types and Burner Adjustment

Procedure for converting the boiler to different gas types and adjusting burner settings.

A) Maximum Heat Output Adjustment

Steps for adjusting the boiler's maximum heat output and burner pressure.

B) Minimum Heat Output Adjustment

Procedure for adjusting the boiler's minimum heat output and burner pressure.

C) Final Settings

Final checks and settings after gas adaptation and burner adjustments.

4. Testing the Boiler

Essential checks and procedures for testing the boiler after installation.

4.1 Preliminary Checks

Final checks to ensure the boiler is ready for testing after installation.

4.2 Switching On and Off

Procedure for switching the boiler on and off during the testing phase.

5. Boiler Maintenance

Maintenance Schedule

List of routine checks, cleaning tasks, and recommended maintenance procedures.

6. Boiler Troubleshooting

Burner Ignition Issues

Troubleshooting steps for burner ignition failures and brief shutdowns.

Air;Flue Gas System Faults

Diagnosing and resolving issues related to air intake and flue gas pressure switches.

Safety Shutdowns

Addressing shutdowns caused by safety thermostats, overheating, or low pressure.

Central Heating Flow Problems

Troubleshooting steps for low CH water pressure and interrupted CH flow.

DHW Supply Issues

Resolving problems with DHW probe, supply, and flow meter operation.

Gas Valve Modulation Issues

Diagnosing and fixing problems with the gas valve modulation coil.