Copeland 998-1000-52 DTC Valve & Thermostat Kit

The Copeland 998-1000-52 DTC Valve & Thermostat Kit is a Discharge Temperature Control (DTC) retrofit kit that protects Copeland refrigeration and air conditioning compressors from damaging overheating conditions, built for 120/240V electrical systems. The kit pairs a discharge-line-mounted DTC valve with a thermostat that continuously monitors discharge line temperature; when readings climb toward an unsafe threshold, the thermostat opens the DTC valve to inject liquid refrigerant into the compressor, pulling discharge temperature back down before heat damage can occur to valves, reeds, or motor windings.

This is the dual-voltage version of Copeland's DTC kit family, giving a single stocked part coverage across both 120V and 240V control circuits rather than requiring a voltage-specific kit. It's intended for HVAC and refrigeration technicians servicing or replacing existing discharge temperature protection components on Copeland compressor systems — particularly on low-temperature and high-compression-ratio applications where discharge temperature runs hottest and compressor life is most sensitive to thermal overload. Neuco's own parts breakdown lists the kit's individually serviceable components as the 510-0993-00 DTC valve group, the 998-0177-00 EVI T-fitting adapter kit, and the 998-7022-09 thermostat kit.

Key Benefits

• Dual-Voltage Coverage: Works on 120V or 240V control circuits, so one part number covers both common voltage configurations.
• Active Overheat Protection: The thermostat and DTC valve work together to inject cooling refrigerant automatically when discharge temperature rises, rather than relying on a fixed bleed.
• Protects Valves and Windings: Reduces the risk of reed valve fatigue, carbon buildup, and motor winding damage caused by sustained high discharge temperature.
• Complete Retrofit Kit: Includes both the valve and thermostat components needed for a full discharge temperature control installation, not just one half of the system.

Common Questions

• What does a DTC valve and thermostat kit actually do? The thermostat monitors discharge line temperature and works with the DTC valve to inject liquid refrigerant into the compressor when temperatures approach an unsafe level, protecting the compressor from thermal damage.
• Is this rated for both 120V and 240V? Yes — the 998-1000-52 is Copeland's dual-voltage 120/240V DTC kit.
• When would I install this instead of a Demand Cooling kit? DTC (Discharge Temperature Control) and Demand Cooling are Copeland's two discharge-protection strategies; use whichever system the compressor's model nomenclature and existing wiring are built for — confirm against the nameplate and existing control wiring before substituting one for the other.

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.