1. Introdución
This manual provides essential information for the safe installation, operation, and maintenance of your Stelpro Ultra-Quiet Wall Convector Heater, model ASHC0502WCW. Please read these instructions thoroughly before installation and retain them for future reference. This heater is designed to provide supplemental heat for small indoor spaces.
2. Información de seguridade
WARNING: Risk of electric shock. Installation must be performed by a qualified electrician in accordance with all national and local electrical codes.
- Este aquecedor está deseñado para hardwired connection only. It is not a plug-in unit.
- Esta unidade does not include a built-in thermostat. An external electronic wall thermostat (sold separately) is required for operation. Mechanical thermostats are not compatible.
- Ensure the power supply is disconnected at the circuit breaker before attempting any installation, maintenance, or wiring.
- Do not install the heater near flammable materials, curtains, or furniture. Maintain adequate clearance as specified in installation guidelines.
- Do not insert foreign objects into any ventilation or exhaust opening as this may cause electric shock, fire, or damage to the heater.
- Este aquecedor está quente cando está en uso. Para evitar queimaduras, non deixe que a pel espida toque superficies quentes.
- Do not use this heater in wet or moist locations unless specifically rated for such environments.
3. Contido do paquete
Comprobe que todos os compoñentes estean presentes antes de comezar a instalación:
- Stelpro Wall Convector Heater Unit (ASHC0502WCW)
- Soporte de montaxe
- Ferraxes de instalación (parafusos, ancoraxes)
- Manual de instrucións

Imaxe 1: Ángulo frontal view of the Stelpro Ultra-Quiet Wall Convector Heater.
4. Especificacións
| Marca | Stelpro |
| Número de modelo | ASHC0502WCW |
| Potencia de saída | 500W (at 240V) / 375W (at 208V) |
| Voltage | 240 Volts (also compatible with 208V) |
| Dimensións (D x W x H) | 3.94" de profundidade x 17.31" de ancho x 17.56" de alto (101 mm de profundidade x 440 mm de ancho x 446 mm de alto) |
| Cobertura de calefacción | Ata 50 pés cadrados |
| Tipo de montaxe | Soporte de parede |
| Cor | Branco |
| Peso | 11.2 libras |

Imaxe 2: Lateral view of the heater showing its compact dimensions: 17 9/16" H x 17 5/16" W x 3 15/16" D.
5. Configuración e instalación
The Stelpro ASHC0502WCW heater is designed for surface-mount wall installation with a concealed bracket for a clean finish. It requires a 240V or 208V hardwired electrical connection and an external electronic wall thermostat.
5.1 Lista de comprobación previa á instalación
- Ensure the power supply is OFF at the main circuit breaker.
- Confirm you have an appropriate electronic wall thermostat (not included).
- Gather necessary tools: drill, screwdriver, wire strippers, level, measuring tape.
- Select a suitable wall location, ensuring proper clearances from floors, ceilings, and adjacent walls as per local codes and the heater's specifications.
5.2 Montaxe do calefactor
- Retire con coidado o quentador da súa embalaxe.
- Detach the mounting bracket from the back of the heater.
- Position the mounting bracket on the wall at the desired height, ensuring it is level. Mark the screw hole locations.
- Drill pilot holes if necessary and secure the mounting bracket to the wall using the provided hardware. Ensure it is firmly attached.
- The heater features a back entry plate with cable clamps para cableado.

Image 3: Illustration of the concealed mounting bracket system for secure and discreet installation.
5.3 Conexión eléctrica
IMPORTANT: All wiring must comply with the National Electrical Code (NEC) and local codes. Consult a qualified electrician if you are unsure about any part of the wiring process.
- Route the 240V or 208V electrical supply wires to the heater's junction box located at the back entry plate.
- Connect the heater's wires to the supply wires according to the wiring diagram provided in the full installation guide (refer to the diagram on the heater or in the included manual). Typically, this involves connecting the two hot wires and the ground wire.
- Asegure todas as conexións cos conectores de cable axeitados.
- Ensure all wiring is neatly tucked into the junction box and the cover is securely fastened.

Image 4: Visual representation of the 240V hardwired connection required for the heater.
5.4 Finalizing Installation
- Carefully hang the heater unit onto the mounted bracket, ensuring it clicks securely into place.
- Install your electronic wall thermostat according to its specific instructions.
- Once the heater and thermostat are fully installed and all connections are secure, restore power at the circuit breaker.

Image 5: The Stelpro convector heater seamlessly installed on a wall in a home office environment.
6. Instrucións de funcionamento
Since the Stelpro ASHC0502WCW heater does not have a built-in thermostat, its operation is entirely controlled by the external electronic wall thermostat you have installed.
- Encendido: After installation, ensure the circuit breaker supplying power to the heater is in the 'ON' position.
- Control de termostato: Adjust the desired temperature setting on your electronic wall thermostat. The heater will activate when the room temperature falls below the set point and deactivate when it reaches the set point.
- Funcionamento silencioso: This convector heater operates silently, providing natural convection heat without a fan.
7. Mantemento
Regular maintenance ensures optimal performance and longevity of your heater. Always disconnect power at the circuit breaker before performing any maintenance.
- Limpeza: Limpe periodicamente o exterior do quentador cun pano suave eamp cloth. Do not use abrasive cleaners, solvents, or spray directly onto the heater.
- Eliminación de po: Use a vacuum cleaner with a brush attachment to remove dust from the air intake and discharge grilles. Ensure these areas remain clear for proper airflow.
- Inspección: Annually inspect the heater for any signs of damage, loose connections, or unusual wear. If any issues are found, contact a qualified electrician or Stelpro support.
8 Solución de problemas
If your heater is not functioning as expected, consult the following common issues before contacting support.
| Problema | Causa posible | Solución |
|---|---|---|
| O quentador non se acende. | Sen alimentación á unidade. Thermostat set too low or off. Conexión de cableado solta. | Comprobar o interruptor automático. Ensure thermostat is set above room temperature and is functioning. Verify wiring connections (power off first). |
| O quentador produce calor insuficiente. | Heater size inadequate for room. Obstrución do fluxo de aire. Mal funcionamento do termostato. | Ensure heater coverage (50 sq ft) matches room size. Clear any obstructions from intake/discharge grilles. Test or replace thermostat. |
| Unusual odors or sounds. | New unit burn-off (initial use). Acumulación de po. Problema de compoñentes internos. | Initial odors are normal and will dissipate. Clean heater as per maintenance section. If persistent or severe, disconnect power and contact support. |
If troubleshooting steps do not resolve the issue, please contact Stelpro customer support or a qualified electrician.
9. Garantía e soporte
Your Stelpro Ultra-Quiet Wall Convector Heater ASHC0502WCW is backed by a comprehensive warranty:
- 5 ano de garantía limitada on the overall unit.
- Garantía de por vida no elemento calefactor.
- 3 anos de garantía on electronic components.
For warranty claims, technical assistance, or further support, please visit the official Stelpro websitio web ou póñase en contacto co seu departamento de atención ao cliente. Garde o comprobante de compra para a validación da garantía.
Stelpro Websitio: www.stelpro.com





