PHD4 Series F and WPH4 Series B 14 SEER Single Package Heat Pump with R-410A Refrigerant Single Phase 2-5 Nominal Tons (Sizes 24-60) Three Phase 3-5 Nominal Tons (Sizes 36-60) Installation Instructions PHD4 Series F and WPH4 Series B 14 SEER Single Package Heat Pump with R-410A Refrigerant Single Phase 2-5 Nominal Tons (Sizes 24-60) Three Phase 3-5 Nominal Tons (Sizes 36-60) Installation Instructions