Copeland 998-0746-00 Valve
The Copeland 998-0746-00 Discharge Temperature Control (DTC) Valve is a critical liquid injection component designed specifically for low-temperature scroll compressors. As a veteran technician knows, scroll sets in low-temp applications lack the thermal mass to dissipate heat effectively. This DTC valve acts as the compressor's internal cooling system, utilizing a thermostatic element with a 194°F sensing bulb. When dome temperatures hit this threshold, the valve injects saturated liquid refrigerant directly into the scroll set, preventing compressor overheating and maintaining the integrity of the lubricant and internal seals.
Constructed from high-grade brass and copper, the Copeland 998-0746-00 features a 3/8" sweat connection for a leak-free, permanent fit. This OEM valve is compatible with R-22, R-404A, R-407C, and R-410A refrigerants. By precisely regulating the discharge gas temperature, it ensures stable system operation and prevents the premature scroll failure often seen in demanding commercial refrigeration environments. For a reliable installation, ensure liquid refrigerant is available at the inlet before startup to avoid damage to the injection valve.
Key Benefits for Technicians:
- Precision Thermal Management: Opens at 194°F to provide immediate liquid injection cooling, safeguarding the compressor from high-discharge-temp trips.
- Broad Refrigerant Compatibility: Engineered for multi-refrigerant use, including R-404A and R-410A low-temp systems.
- Durable Construction: Heavy-duty brass and copper body designed to withstand high-pressure fluctuations and vibration.
- Serviceable Design: Features a 3/8" ODF inlet and a compact profile for easier access in tight condensing unit housings.
- OEM Reliability: Genuine Copeland part ensures exact fitment and factory-spec performance for Copeland scroll compressors.
Common Questions & Troubleshooting:
How do I test if the DTC valve is stuck open?
Perform a pump-down. If the suction pressure rises steadily (more than 6-10 psi) after the compressor stops, close the ball valve feeding the DTC. If the pressure stabilizes, the 998-0746-00 valve or its internal screen is likely fouled or stuck.
Is a solenoid required before the 998-0746-00?
While not always mandatory, many technicians install a solenoid valve in the liquid line ahead of the DTC valve, wired through the compressor contactor, to prevent refrigerant migration during the off-cycle.
What is the sensing bulb temperature limit?
The sensing bulb is calibrated for a 194°F crack-open point and should not be exposed to temperatures exceeding 293°F during operation to prevent damage to the thermostatic element.
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.
Original: $446.64
-65%$446.64
$156.32Copeland 998-0746-00 Valve
The Copeland 998-0746-00 Discharge Temperature Control (DTC) Valve is a critical liquid injection component designed specifically for low-temperature scroll compressors. As a veteran technician knows, scroll sets in low-temp applications lack the thermal mass to dissipate heat effectively. This DTC valve acts as the compressor's internal cooling system, utilizing a thermostatic element with a 194°F sensing bulb. When dome temperatures hit this threshold, the valve injects saturated liquid refrigerant directly into the scroll set, preventing compressor overheating and maintaining the integrity of the lubricant and internal seals.
Constructed from high-grade brass and copper, the Copeland 998-0746-00 features a 3/8" sweat connection for a leak-free, permanent fit. This OEM valve is compatible with R-22, R-404A, R-407C, and R-410A refrigerants. By precisely regulating the discharge gas temperature, it ensures stable system operation and prevents the premature scroll failure often seen in demanding commercial refrigeration environments. For a reliable installation, ensure liquid refrigerant is available at the inlet before startup to avoid damage to the injection valve.
Key Benefits for Technicians:
- Precision Thermal Management: Opens at 194°F to provide immediate liquid injection cooling, safeguarding the compressor from high-discharge-temp trips.
- Broad Refrigerant Compatibility: Engineered for multi-refrigerant use, including R-404A and R-410A low-temp systems.
- Durable Construction: Heavy-duty brass and copper body designed to withstand high-pressure fluctuations and vibration.
- Serviceable Design: Features a 3/8" ODF inlet and a compact profile for easier access in tight condensing unit housings.
- OEM Reliability: Genuine Copeland part ensures exact fitment and factory-spec performance for Copeland scroll compressors.
Common Questions & Troubleshooting:
How do I test if the DTC valve is stuck open?
Perform a pump-down. If the suction pressure rises steadily (more than 6-10 psi) after the compressor stops, close the ball valve feeding the DTC. If the pressure stabilizes, the 998-0746-00 valve or its internal screen is likely fouled or stuck.
Is a solenoid required before the 998-0746-00?
While not always mandatory, many technicians install a solenoid valve in the liquid line ahead of the DTC valve, wired through the compressor contactor, to prevent refrigerant migration during the off-cycle.
What is the sensing bulb temperature limit?
The sensing bulb is calibrated for a 194°F crack-open point and should not be exposed to temperatures exceeding 293°F during operation to prevent damage to the thermostatic element.
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.
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Description
The Copeland 998-0746-00 Discharge Temperature Control (DTC) Valve is a critical liquid injection component designed specifically for low-temperature scroll compressors. As a veteran technician knows, scroll sets in low-temp applications lack the thermal mass to dissipate heat effectively. This DTC valve acts as the compressor's internal cooling system, utilizing a thermostatic element with a 194°F sensing bulb. When dome temperatures hit this threshold, the valve injects saturated liquid refrigerant directly into the scroll set, preventing compressor overheating and maintaining the integrity of the lubricant and internal seals.
Constructed from high-grade brass and copper, the Copeland 998-0746-00 features a 3/8" sweat connection for a leak-free, permanent fit. This OEM valve is compatible with R-22, R-404A, R-407C, and R-410A refrigerants. By precisely regulating the discharge gas temperature, it ensures stable system operation and prevents the premature scroll failure often seen in demanding commercial refrigeration environments. For a reliable installation, ensure liquid refrigerant is available at the inlet before startup to avoid damage to the injection valve.
Key Benefits for Technicians:
- Precision Thermal Management: Opens at 194°F to provide immediate liquid injection cooling, safeguarding the compressor from high-discharge-temp trips.
- Broad Refrigerant Compatibility: Engineered for multi-refrigerant use, including R-404A and R-410A low-temp systems.
- Durable Construction: Heavy-duty brass and copper body designed to withstand high-pressure fluctuations and vibration.
- Serviceable Design: Features a 3/8" ODF inlet and a compact profile for easier access in tight condensing unit housings.
- OEM Reliability: Genuine Copeland part ensures exact fitment and factory-spec performance for Copeland scroll compressors.
Common Questions & Troubleshooting:
How do I test if the DTC valve is stuck open?
Perform a pump-down. If the suction pressure rises steadily (more than 6-10 psi) after the compressor stops, close the ball valve feeding the DTC. If the pressure stabilizes, the 998-0746-00 valve or its internal screen is likely fouled or stuck.
Is a solenoid required before the 998-0746-00?
While not always mandatory, many technicians install a solenoid valve in the liquid line ahead of the DTC valve, wired through the compressor contactor, to prevent refrigerant migration during the off-cycle.
What is the sensing bulb temperature limit?
The sensing bulb is calibrated for a 194°F crack-open point and should not be exposed to temperatures exceeding 293°F during operation to prevent damage to the thermostatic element.
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.
