Tecumseh AG 4581 P-TZ (Old Code: TAG 4581 Z) 8 Hp R-404A Refrigeration Compressor

The TAG 4581 Z compressor by Tecumseh (France), well known in commercial refrigeration, is now produced under the code AG 4581 P-TZ following the brand's global catalogue update. The code change is only a naming standard: housing dimensions, rotalock valve connections and cooling capacity are identical. You can fit this original compressor with its new code in place of a failed TAG 4581 Z as a direct drop-in, without modifying the chassis or the fittings.

New Code and Old Code Cross-Reference

• New Model Code: Tecumseh AG 4581 P-TZ (AG4581P-TZ)
• Old Model Code: Tecumseh TAG 4581 Z (TAG4581Z)
• Code Suffix: TZ = three-phase motor, 400 V 3~ 50 Hz / 440 V 3~ 60 Hz
• Motor Power: 8 HP
• Cooling Capacity (R-404A, 50 Hz): 14,518 W / 49,540 BTU/h (−10 °C evaporating / +45 °C condensing); EN12900 rating (+5 °C / +50 °C) 16,819 W / 57,390 BTU/h
• Application: Medium/high back pressure (MBP/HBP), evaporating −15 … +15 °C
• Approved Refrigerants: R-404A, R-448A, R-449A, R-452A, R-454C, R-455A
• Displacement: 145 cm³
• Current (50 Hz): RLA 12.3 A, LRA 85 A
• Oil: POE (polyolester), 1760 cm³
• Connection Type: Rotalock valves

Model: Tecumseh TAG 4581 Z

Connection: With valves

Power: 8 HP

Voltage: 400V, 3-phase, 50Hz (or 440V, 3-phase, 60Hz)

Refrigerant: R404A (also compatible with R507)

Displacement: 145 cm³

Oil Type: Polyolester (POE)

Oil Quantity: 1960 cm³

Connection Sizes:

• Suction Line: 1-1/8" (28.6 mm)

Design: Hermetic, Reciprocating

Motor Type: Three-phase induction

Cooling Capacity

Cooling Capacity with R404A (W):

• -10°C evaporating and 45°C condensing: 14,518 W (approx. 49,540 BTU/h)

Technical Data

Weight: 56 kg

Sound Level: 84 dB(A)

Expansion Device: Capillary Tube or Expansion Valve

Operating Temperature Range: -15°C to +15°C evaporating (Medium/High Back Pressure)

Condensing Temperature: 45°C to 55°C

Origin: France