PTAC Service Manual

Service Manual
Technical Information
51
4. Refrigerant System Diagram
(1)Cooling + Heat Pump + Auxiliary Electric Heater
(2) Cooling + Electric Heater
COOLED AIR
HOT DISCHARGED AIR
OUTDOOR COILS
CAPILLARY
AXIAL FAN
COMPRESSOR
HEATING MODE
COOLING MODE
NOTES:
REFRIGERANT FLOW DIRECTION
CENTRIFUGAL
OR CROSS FAN
HOT AIR
INDOOR COILS
ELECTRIC HEATER
COOLED AIR
outdoor heat
exchanger
hot wind
compressor
axial flow blade
centrifugal
blade
capillary
flow direction of refrigerant
cool wind
indoor heat
exchanger
electric heater
(Note: electric heater
is not available for
cooling only unit)