Terminal Board & Td Relay

Modine – Terminal Board & TD Relay The NBK-21078 Terminal Board & TD (Time Delay) Relay is designed for use in greenhouse heaters and HVAC systems requiring coordinated blower control. This precision assembly integrates essential terminal wiring with a built-in time delay relay, ensuring reliable sequencing between heating and blower functions. It prevents premature blower activation, improving comfort and extending equipment life.Key Features:• Integrated Design: Combines terminal wiring and time delay relay into a single compact control board• Protects Heat Exchanger: Delays blower activation until proper temperature is reached, preventing cold air discharge• Reliable Cycle Control: Prevents short cycling, reducing system stress and extending component longevity• Direct Replacement: Matches OEM specifications for easy installation and consistent operationSpecifications:• SKU: 21078• Category: Greenhouse / Terminal Boards & Relays• Description: NBK-21078 Terminal Board & TD Relay• Equivalent To:   – Modine 4015315   – Modine 3H36849-1   – Modine 5H78126-1Why Replace This Component:A failing terminal board or time delay relay can lead to blower malfunctions, frequent cycling, or system shutdowns. Replacing it with the NBK-21078 ensures proper timing and electrical coordination, protecting both your heating system and your greenhouse environment.