Data Aire gForce Ultra Installation, Operation And Maintenance Manual page 43

Observe the sight glass on the receiver. Meter refrigerant through the suction line until the level of
liquid in the receiver is approximately 1/3 from the bottom (the leveling ball in the receiver will start
to float) of the sight glass. The unit should be allowed to stabilize for 15 to 20 minutes to verify key
measurements in the table below.
Discharge Pressure
Suction Pressure
Superheat
Measure the superheat at the compressor suction line at least 6 inches (152 mm) away from the com-
pressor. Compare suction pressure and temperature reading between the dap4 and the manifolds. If
the difference between the manifold reading and dap4 reading is more than 5%, check for the EEV
wiring and any possible alarms on dap4, or EEV driver. Measure sub-cooling at the liquid line.
When charging is complete, add the correct amount of oil, if the line run exceeds longer than 20m
or 66ft. This procedure must be conducted with the system running at high load (compressor at full
speed).
ALWAYS use original Danfoss POE oil 160SZ from new cans.
Oil addition is calculated based on refrigerant charge, shown in the table below:
Function
Additional Oil Required (oz)
Note: Additional oil is only needed if pipe run is longer than 20m or 66ft.
Total Refrigerant Weight
(lbs.)
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
R-410A Conditions
322 PSIG (2220 kPa)
104 PSIG (717 kPa)
or greater
10 to 12°F (5.56to 6.67°C) Differential
Danfoss Variable Speed
Compressor
12
18
25
31
37
43
49
55
61
67
74
80
86
92
98
104
110
43
Danfoss Fixed Speed
Compressor
6
9
12
15
18
21
25
28
31
34
37
40
43
46
49
52
55