Data Aire gForce DX - Additional Oil; Flooded System Charging (Systems with Low Ambient Receiver Package)

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Table 3 Refrigerant Charge Values
Function
R-410A Conditions
R-407C Conditions
Discharge Pressure
322 PSIG (2220 kPa)
minimum
199 PSIG (1372 kPa)
minimum
Liquid Line Pressure
290 to 390 PSIG
(2000 to 2688 kPa)
245 to 285 PSIG
(1689 to 1965 kPa)
Liquid Line
Temperature
85 to 100°F
(29.4 to 37.8°C)
106 to 115°F
(41.1 to 46.1°C)
Suction Pressure
103 to 130 PSIG
(710 to 896 kPa)
53 to 70 PSIG
(365 to 483 kPa)
Suction Saturated
Temperature
33 to 45°F
(0.56 to 7.2°C)
33 to 45°F
(0.56 to 7.2°C)
Subcooling
8 to 15°F
(-13.3 to -9.4°C)
8 to 10°F
(-13.3 to -12.2°C)
Differential Temperature - Depending on ambient conditions, at
compressor’s maximum speed
Superheat
8 to 18°F
(-13.3 to -7.8°C)
8 to 15°F
(-13.3 to -9.4°C)
Differential Temperature
Measure the superheat at the compressor suction line at least 6 inches (152 mm) away from
the compressor. If the unit has optional Electronic Expansion Valve(s) (EEV) compare suction
pressure and temperature reading between the controller and the manifolds. If the difference
between the manifold reading and controller reading is more than 5%, check for the EEV
wiring and any possible alarms on controller, or EEV driver. Measure sub-cooling at the liquid
line.
Additional Oil
When charging is complete, add the correct amount of oil to each circuit. In installations with
good oil return and line runs up to 50 ft (15 m), no additional oil is required. If installation lines
exceed 50 ft (15 m), additional oil needs to be added. 1 or 2% of the total system refrigerant
charge (in weight) can be used to roughly define the required oil top-up quantity.
Top-up the oil while the compressor is idle. Use any accessible connector on the compressor
suction line and a suitable pump. ALWAYS use clean original Danfoss POE oil 160SZ or
equivalent from new cans.
After charging, verifying subcooling and oil level.
Close the valve on the refrigerant manifold gauge set and close the service valve on the
refrigerant tank and disconnect the refrigerant manifold gauge set.
Repeat the above steps for circuit 2 on a dual compressor unit.
Flooded System Charging (Systems with Low Ambient Receiver Package)