58
System Start-up (Continued)
Table 5-8
80 Ton Pressure Curve for each Circuit
COOLING CYCLE PRESSURE CURVE
(Based on Indoor Airflow of 400 CFM / Ton)
FULL LOAD
180
200
220
240
260
280
300
320
340
360
380
400
55
60
65
70
75
80
85
90
95
100
105
SUCTION PRESSURE, PSIG
DISCHARG
E PRESSURE, PSIG
105 F OD Ambient
95 F OD Ambient
85 F OD Ambient
75 F OD Ambient
65 F OD Ambient
To Check Operating Pressures
1. Start the unit and allow the pressures to stabilize.
2. Measure the outdoor air dry bulb temperature (F)
entering the condenser coil.
3. Measure the discharge and suction pressure (psig)
next to the compressor.
4. Plot the outdoor dry bulb temperature and the
operating suction pressure (psig) onto the chart.
5. At the point of intersection, read to the left for the
discharge pressure. The measured discharge
pressure should be within ± 7 psig of the graph.
115 F OD Ambient
100 Ton Pressure Curve for each Circuit
COOLING CYCLE PRESSURE CURVE
(Based on Indoor Airflow of 400 CFM / Ton)
FULL LOAD
180
200
220
240
260
280
300
320
340
360
380
400
55
60
65
70
75
80
85
90
95
100
105
SUCTION PRESSURE, PSIG
DISCHARG
E PRESSURE, PSIG
105 F OD Ambient
95 F OD Ambient
85 F OD Ambient
75 F OD Ambient
65 F OD Ambient
To Check Operating Pressures
1. Start the unit and allow the pressures to stabilize.
2. Measure the outdoor air dry bulb temperature (F)
entering the condenser coil.
3. Measure the discharge and suction pressure (psig)
next to the compressor.
4. Plot the outdoor dry bulb temperature and the
operating suction pressure (psig) onto the chart.
5. At the point of intersection, read to the left for the
discharge pressure. The measured discharge
pressure should be within ± 7 psig of the graph.
115 F OD Ambient
Summary of Contents for RAUC-IOM-15
Page 8: ...8 Figure 3 2A RAUC C80 Unit Dimensional Data Recommended Clearances...
Page 9: ...9 Figure 3 2A Continued RAUC D10 Unit Dimensional Data Recommended Clearances...
Page 10: ...10 Figure 3 2A Continued RAUC D12 Unit Dimensional Data Recommended Clearances...
Page 11: ...11 Figure 3 2B EVPB C80 Evaporator Chiller Dimensions...
Page 12: ...12 Figure 3 2B Continued EVPB D10 Evaporator Chiller Dimensions...
Page 13: ...13 Figure 3 2B Continued EVPB D12 Evaporator Chiller Dimensions...
Page 14: ...14 Figure 3 2B Continued EVPB C80 through D12 Chill Water Pipe Stubout Dimensions...
Page 35: ...35 Installation Continued Field Connection Diagram Notes for all System Control Options...
Page 57: ...57 Figure 5 5 Typical Scroll Compressor Terminal Block System Start Up Continued...
Page 67: ...67...
Page 68: ...68...