Data Aire gPod - Flooded System Charging

Installation, Operation and Maintenance Manual
Page 29 of 100
NOTICE ALWAYS use POE oil from new cans.
Oil addition is calculated based on refrigerant charge, shown in the table below:
Table 1 - Additional Oil Required When Charging
Additional Oil Required (oz) When Changing
Note: Additional oil is only needed if pipe run is longer than 66 feet (20m)
Total Refrigerant
Charge (lbs.)
Fixed Speed
Compressor
Total Refrigerant
Charge (lbs.)
Fixed Speed
Compressor
20
6
140
43
30
9
150
46
40
12
160
49
50
15
170
52
60
18
180
55
70
21
190
58
80
25
200
61
90
28
210
64
100
31
220
67
110
34
230
71
120
37
240
74
130
40
250
77
4.1.3 Flooded System Charging
Flooded type systems are supplied with optional liquid receiver and head pressure control valve. When the ambient
temperature falls during cold weather, the head pressure control valve will regulate the flow of refrigerant to ensure
nearly constant receiver pressure. The condenser is partially flooded with liquid refrigerant in cold weather. In warm
weather the extra refrigerant is stored in the receiver.
Flooded systems require more refrigerant than fan speed control systems. Connect the pressure gauge manifold
set to the high and low ports near the compressor. Connect the charging line to the refrigerant tank and set for
liquid feed. Open the refrigerant tank valve and purge the line. Open the high side valve on the manifold only and
allow the refrigerant to flow until the system pressure equalizes. At this point the system will have 75 to 85% of the
total refrigerant charge. Start the evaporator motor. Start the compressor and check the operating pressures and
temperatures.
A quick and easy way to run the compressor is using the manual switch on the unit’s microprocessor. Switch the
compressor manual switch to the ON position. All automatic control is disabled but safety switches will remain
functional. Manual Control mode in dap4 or Mini-dap4 Menu I can be used to run fan and compressor as well.
For units with blowers, switch the blower manual switch to the “ON” position.
For units with plug fans, using the manual switch operation will not bring the fans to full speed. Enabling the
BLOWER manual mode switch engages the system powering the high voltage to the plug fans but sets the control