White-Rodgers Fan Control Center Model 90-118E Instruction Manual

Introduction

This manual provides detailed instructions for the installation, operation, and maintenance of the White-Rodgers Fan Control Center, Model 90-118E. This device is designed to manage fan operations in heating, ventilation, and air conditioning (HVAC) systems. Please read this manual thoroughly before installation and use to ensure safe and efficient operation.

Consignes de sécurité

AVERTISSEMENT : Risque de choc électrique. Coupez l’alimentation avant toute installation ou intervention.

• L'installation doit être effectuée par un technicien qualifié, conformément à toutes les normes électriques locales et nationales.
• Ensure the power supply to the HVAC system is completely disconnected before beginning any work.
• Verify all wiring connections are secure and correct to prevent damage to the unit or system.
• N’utilisez pas l’appareil si une pièce est endommagée.

Produit terminéview

The White-Rodgers Fan Control Center 90-118E is a robust component designed for reliable fan control. Key features include:

• Plug-in style relay: Facilitates easy field replacement.
• Pre-stripped, color-coded leads: Simplifies wiring connections.
• Five combination screw/solder terminals: Pour bas voltage câblage.
• Standard double-throw relays: Capable of handling both one and two-speed motors.
• Mounting design: Suitable for a 4-inch electrical box.

Figure 1 : White-Rodgers Fan Control Center 90-118E. This image shows the control center from an angled perspective, highlighting the metal mounting plate, the central transformer component, and the pre-stripped, color-coded wires neatly bundled and connected to the terminal block.

Installation

Outils requis :

• Tournevis (Phillips et/ou plat)
• Pinces à dénuder/coupe-fils
• Multimètre (pour vérification)

Étapes d'installation :

1. Débrancher l'alimentation : Turn off the main power supply to the HVAC system at the circuit breaker. Verify power is off using a multimeter.
2. Remove Existing Unit (if applicable): Carefully disconnect and remove the old fan control center, noting all wiring connections.
3. Installez le nouvel appareil : The 90-118E is designed for mounting in a standard 4-inch electrical box. Secure the unit using appropriate screws.
4. Connexions filaires : Connect the pre-stripped, color-coded leads to the corresponding terminals in your HVAC system. Refer to your specific HVAC system's wiring diagram for accurate connections. The unit features five combination screw/solder terminals for low voltage câblage.
5. Relay Installation: The plug-in style relay should be securely seated in its receptacle.
6. Vérifiez les connexions : Vérifiez minutieusement que tous les branchements électriques sont bien serrés et corrects.
7. Restaurer l'alimentation : Once all connections are verified, restore power to the HVAC system.

Opération

The White-Rodgers Fan Control Center 90-118E operates automatically as an integral part of your HVAC system. It receives signals from the thermostat or other control devices to activate and deactivate the fan motor. Its primary function is to provide reliable switching for fan operations, supporting both single and two-speed motors.

• Upon receiving a call for fan operation (e.g., from a thermostat), the internal relay will energize, closing the appropriate contacts to power the fan motor.
• When the call for fan operation ceases, the relay de-energizes, opening the contacts and turning off the fan motor.
• The double-throw relay design allows for flexible control of different fan motor types and speeds, depending on the system's configuration.

Entretien

The White-Rodgers Fan Control Center 90-118E is designed for minimal maintenance. Regular inspection by a qualified technician is recommended as part of routine HVAC system checks.

• Inspection annuelle: During annual HVAC system servicing, have a technician inspect the control center for any signs of wear, corrosion, or loose connections.
• Nettoyage: Ensure the unit is free from dust and debris. Use a soft, dry brush or compressed air for cleaning. Do not use liquid cleaners.
• Remplacement du relais : The plug-in style relay is designed for easy replacement if it fails. Ensure power is disconnected before attempting to replace the relay.

Dépannage

If you experience issues with your fan control center, refer to the following common troubleshooting steps. For complex issues, contact a qualified HVAC technician.

• Le ventilateur ne s'allume pas :
  • Check if the main power supply to the HVAC system is on.
  • Verify the thermostat is calling for fan operation.
  • Vérifiez que les connexions électriques ne sont pas desserrées ou endommagées.
  • Test the relay for continuity (requires a multimeter and electrical knowledge).
• Fan Running Continuously:
  • Check if the thermostat is stuck in the "Fan ON" position.
  • The relay contacts may be fused closed. The relay may need replacement.
• Intermittent Fan Operation:
  • Connexions de câblage desserrées.
  • Faulty relay or control board in the HVAC system.
• Pas de faible volumetage (24V) Output:
  • Check the primary 120V input to the control center.
  • The internal transformer may be faulty.

Caractéristiques

Garantie et assistance

For warranty information and technical support, please refer to the official White-Rodgers webConsultez leur site web ou contactez leur service client. Conservez votre reçu d'achat pour toute réclamation au titre de la garantie.

White-Rodgers Customer Service: Visit Emerson.com/contact-us (White-Rodgers is an Emerson brand)