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Use the White/Blue and White/Yellow wires for 10-30V control signals
the York filter drier provides a reliable solution for ensuring refrigerant purity during compressor swaps or leak repairs
upgrading from carbide to nitride typically requires a specific conversion kit or a different part number within the Resideo line
reflecting its heavy-duty design
including LH33ZS001
Robertshaw 190-065 Metal Guard Use the White/Blue and White/YellowThe Robertshaw 190 065 Metal Guard (BTG 54 VL) is a heavy duty thermostat lock box designed for high traffic commercial environments where tamper resistance is critical. Constructed from industrial grade 18 22 gauge steel with a baked enamel finish, this rectangular guard provides a physical barrier against unauthorized temperature adjustments. This kit features a solid mounting base, ensuring the thermostat is fully enclosed. For the service tech,