Terminal Board & TD Relay | NBK-21078

NBK-21078 – Terminal Board & TD Relay – Special Order

The NBK-21078 Terminal Board & TD (Time Delay) Relay is engineered for use in greenhouse heaters and various HVAC systems requiring coordinated time-delay blower operations. This replacement assembly integrates essential wiring connections with a built-in time delay relay to help manage blower cycles, safeguarding your heating equipment and optimizing comfort.

⚠️ SPECIAL ORDER NOTICE: This is a special order product from NBK, requiring an additional 1–2 business days for processing before shipment.

Key Features:
✅ Integrated Design: Combines terminal block wiring with a precision time delay relay in a single unit
✅ Protects Heat Exchanger: Ensures blower runs only after adequate warm-up, preventing cold air discharge
✅ Reliable Cycle Control: Time delay prevents short cycling, extending system and component life
✅ Direct Replacement: Matches OEM specs for straightforward swap with existing control boards

Specifications:
📌 SKU: 21078
📌 Category: Greenhouse / Terminal Boards & Relays
📌 Description: NBK-21078 Terminal Board & TD Relay
📌 Equivalent To:

• Modine 4015315

• Modine 3H36849-1

• Modine 5H78126-1

Why Replace This Component:
A worn or failing terminal board with integrated TD relay can cause blower malfunctions, short cycling, or system lockouts. Replacing it with the NBK-21078 restores proper timing and electrical connections, protecting both your heating system and your crop or greenhouse environment.

Shipping & Availability:
This item is a special order product from NBK, and requires 1–2 extra business days to process prior to shipping.