R-410A Quick Reference Guide
DuraSea Condenser Installation, Start-Up & Service Manual
2
L-3153
UNPACKING AND INSPECTION
Units are securely packed in shipping crates. Upon arrival, carefully check all items against the packing list to ensure all cartons
were received and correct equipment was received. Always keep the unit in the "up" orientation as indicated by the arrows on
each carton.
Check the cartons for external damage, removing the units from the packaging if necessary. If damage is found, file a request in
writing for inspection by the carrier agent immediately. The carrier is responsible for making prompt inspection of damage and
for a thorough investigation of each claim. The distributor or manufacturer will not accept claims from dealers for transportation
damage. If no damage is found, carefully remove all shipping material and properly dispose of it.
After unpacking, keep the units as upright as possible. Laying a unit on its side or top could cause equipment damage.
R-410A Q
UICK
R
EFERENCE
G
UIDE
•
This system uses R-410A refrigerant.
•
R-410A is an environmentally safe hydrofluorocarbon (HFC) refrigerant.
•
R-410A refrigerant operates at 50-70% higher pressures than R-22. Ensure that the servicing equipment and
replacement components used are designed to operate with R-410A.
•
R-410A refrigerant cylinders are light maroon (pink) in color.
•
R-410A refrigerant cylinders have a dip tube which allows liquid to flow out of the cylinder in an upright position.
NOTE:
Recovery cylinder service pressure rating must be 400 psig (2758 kPa), DOT RBA400 or DOT BW400.
•
R-410A systems should be charged with liquid refrigerant. Use a commercial type metering device in the manifold
hose.
•
R-410A requires a different set of gauges than those used for R-22.
•
Manifold sets should be 800 psig (5516 kPa) high side and 250 psig (1724 kPa) low side with 550 psig (3792 kPa) low
side retard.
•
Use hoses with 800 psig (5516 kPa) service-pressure rating.
•
R-410A requires matched evaporator and condenser systems.
•
Leak detectors should be designed to detect HFC refrigerant.
•
R-410A, as with other HFCs, is only compatible with POE or PVE oils.
•
POE oils absorb moisture rapidly. Do not expose oil to atmosphere.
•
Vacuum pumps will not remove moisture from oil.
•
A liquid line filter dryer listed for R-410A is required on every unit.
•
Do not use liquid line filter dryers with rated working pressures less than 600 psig (4137 kPa).
•
Do not install a suction line filter dryer in a liquid line.
•
Wrap all filter dryers and service valves with wet cloth when brazing.
•
Do NOT use an R-22 thermal expansion valve (TXV).
•
Never open system to atmosphere while it is under a vacuum.
•
When system must be opened for service, evacuate then break vacuum with dry nitrogen and replace filter dryers.
•
Do not vent R-410A into the atmosphere.
M
ODEL
N
UMBER
N
OMENCLATURE
For an explanation of the model numbers see Figure 1, page 3.
Summary of Contents for DuraSea DCA120D
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