Reznor rz201946 Door Switch Udas

Product Description

The REZNOR rz201946 is a door switch designed for UDAS series unit heaters. Door switches are safety interlock components that interrupt the control circuit when an access panel or service door is opened, preventing equipment operation during maintenance or inspection. This switch is a direct-fit replacement part installed by licensed HVAC technicians servicing commercial and industrial heating equipment. It plays a critical role in the safety control chain of gas-fired unit heaters, ensuring the burner and blower circuits cannot energize while a cabinet door is ajar.

The rz201946 door switch is intended for use in REZNOR UDAS series unit heaters, which are commonly found in commercial and industrial applications such as warehouses, manufacturing facilities, and large mechanical rooms. Technicians servicing UDAS series equipment will encounter this switch as part of routine maintenance or safety system repairs when the existing interlock switch fails or becomes damaged.

Key Features

• Safety interlock function prevents heater operation when access door is open
• Direct-fit OEM replacement for REZNOR UDAS series unit heaters
• Interrupts control circuit to protect technicians during service access
• Compatible with commercial and industrial gas-fired unit heater applications

Compatibility

Designed as an OEM-style replacement door switch for REZNOR UDAS series unit heaters.

Installation Notes

Installation should be performed by a licensed HVAC technician familiar with commercial gas-fired heating equipment. Before servicing, shut off all electrical power to the unit at the disconnect switch and allow the heat exchanger to cool completely. The door switch is a control-circuit component; verify wiring connections against the unit wiring diagram before restoring power. Follow all applicable local codes and manufacturer service guidelines when replacing safety interlock components.

Technical Specifications

• Application: UDAS Series Door Switch

Standard Information

• Brand: REZNOR
• Manufacturer Part Number: rz201946