Honeywell 221729A Dust Cover

The Honeywell 221729A Dust Cover is a professional-grade protective housing designed specifically for the 7800 Series Relay Modules. As a veteran in the field, you know that keeping sensitive microprocessor-based integrated burner controls free from site debris is non-negotiable for system reliability. This authentic Honeywell flame safeguard accessory provides an essential physical barrier for configuration jumpers and plug-in purge timers on modules that do not utilize an S7800 Keyboard Display Module. Engineered from high-strength composite materials, the 221729A features a precision-molded design with two interlocking ears that align perfectly with the mating slots on RM7823, RM7885, RM7890, and RM7840 units. The hinge-action installation ensures a secure, vibration-resistant fit, maintaining the integrity of the 7800 series burner control environment. Utilizing this OEM Honeywell dust cover prevents premature component failure caused by airborne contaminants in demanding boiler rooms and industrial heating applications.

• Direct Compatibility: Engineered specifically for the 7800 Series Relay Modules to ensure a seamless, gap-free fit.
• Component Protection: Shields critical configuration jumpers and purge timer cards from dust, moisture, and debris.
• Simple Installation: Tool-free, hinge-action mounting allows for quick field attachment and removal during maintenance.
• NEMA-Standard Reliability: Maintains the rugged environmental profile required for industrial flame safeguard systems.

• Is this cover required if I am using a Keyboard Display Module? No, if an S7800 Keyboard Display is installed, it occupies the same mounting area; the 221729A is for units without a display.
• Which specific 7800 series models does this fit? It is compatible with RM7823, RM7885, RM7890, RM7895, and RM7840 primary and programming controls.
• Does this include the relay module? No, this is the standalone Honeywell logo protective cover accessory only.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.