PT Chart & Superheat

Pressure: bar g
Temperature: Celsius °C

Safety class A1 · GWP 1387 · Zeotropic (glide)

F-Gas: Phase-down

GWP 1387. Subject to phase-down quotas; restricted in many new equipment types.

Suggested: Low-GWP options: R-290, R-744, R-1234ze

Saturation temp (°C)

Dew (vapour)

2.57

bar g

Bubble (liquid)

3.45

bar g

Use dew for superheat, bubble for subcooling.

Superheat

Superheat (TXV target 4–8 K)

—

Subcooling

Subcooling (TXV target 3–6 K)

—

Charge optimiser

Measured discharge-gas temperature is not liquid-line temperature. Charge mass cannot be inferred from pressures or sound; weigh charge using manufacturer procedures.

Suction (bar g)Suction-line (°C)High-side (bar g)Liquid-line (°C)Outdoor ambient (°C)Box / space (°C)Manufacturer target superheat (K)Manufacturer target subcooling (K)Liquid line length (m)Factory included length (m)Manufacturer extra charge (g/m)

Manufacturer model / curve reference

F-Gas compliance record

Client / operatorClient siteAsset identifier / serial

JurisdictionRefrigerantVerified system charge (kg)Last leakage check

Charge and recovery masses must be verified by weighing or documented equipment records, never inferred from pressure or worn text.

Labelled hermetically sealedAutomatic leak detection installed

Tonnes CO₂e

0.000

GWP

1387

Routine F-Gas check exempt

No GB routine interval established · Due not established

ActivityActivity dateLeakage check resultRefrigerant added (kg)Refrigerant recovered (kg)Gas originCylinder serial / IDCylinder movement fromCylinder movement toWeighing / leak-check methodRecovery destination / waste carrierRecycling facility name and addressFacility certificate numberContractor companyContractor addressCompany F-Gas certificate numberCertified engineer nameRecord notes

For guidance and logging assistance only. The inspecting engineer and operating company remain solely responsible for statutory UK compliance, physical testing, and record accuracy.