Resideo - Honeywell Home L8148E1299 Hydronic Control Relay

Hydronic Control Relay from Resideo – Honeywell Home L8148E1299 is a versatile Multi-Function switch designed for hydronic heating systems. This SPST (High Limit and Circulator) relay delivers reliable control and safety in a compact package, perfect for demanding boiler and radiant setups.

Built for robust performance, it supports multiple load ratings (0.8 A at 24 V AC, 44.4 A at 120 V AC, 22.2 A at 240 V AC) and a wide operating range. The unit features a 120 V AC input, a temperature rating of 180–240°F, and a 255 psi immersion well. With High Limit Protection, a 50 VA transformer, heat-conductive compound, and a Molex plug, this relay is designed for long service life. It is UL and CSA listed and intended for vertical mounting in hydronic heating systems, using either quick-connect or screw connections. The device handles humid environments (0–95% RH non-condensing) and maintains a fixed 15°F differential temperature, ensuring steady, safe operation across seasonal changes.

• High Limit Protection
• 50 VA Transformer
• Heat Conductive Compound
• Molex Plug
• UL & CSA Listed
• Vertical Mounting
• Quick Connect / Screw Connections
• Fixed 15°F Differential