100340202 Lochinvar Control Transformer (120V → 24V, 100VA)

🔥 Product Overview

The 100340202 Lochinvar Control Transformer is designed for all Knight XL Condensing Boilers, providing reliable voltage conversion from 120V primary to 24V secondary for safe and efficient control system operation. This high-quality transformer ensures consistent performance in residential and commercial boiler applications.

Voltage & Capacity:

• Input (Primary): 120V AC, 50/60Hz

• Output (Secondary): 24V AC, 100VA

• Frequency: 50/60 Hz

Wiring:

• Primary: Black & White (120V)

• Secondary: Yellow & Blue (24V)

⚠️ Note: ❗ Compatible with all Knight XL Condensing Boilers. Always verify your boiler model before installation.

⚙️ Key Features

• ✅ Converts 120V AC to 24V AC for control circuits

• ✅ 100VA capacity suitable for all Knight XL Condensing Boilers

• ✅ Works with 50/60 Hz systems

• ✅ Durable construction for long-lasting operation

• ✅ Easy installation with clearly labeled primary and secondary wires

📊 Specifications

⚠️ Common Symptoms Indicating Replacement

• Low or no 24V output

• Control circuits failing to operate

• Tripped breakers or blown fuses

• Visible damage, overheating, or burnt smell

❓ Frequently Asked Questions (FAQ)

Q: Which boilers is this transformer compatible with?
A: All Knight XL Condensing Boilers.

Q: Can it handle 50/60 Hz systems?
A: Yes — designed for both 50 Hz and 60 Hz operation.

Q: How do I identify primary and secondary wires?
A: Primary: Black & White (120V) | Secondary: Yellow & Blue (24V)

Q: Is this a direct replacement?
A: Yes — it is a direct replacement for Lochinvar part number 100340202.

🛒 Shopping Tips

• Always verify your boiler model before purchasing

• Ensure proper voltage and wiring connections for safety

• Inspect for damage before installation

• Replace transformers during routine maintenance to prevent system failure