McQuay TSC User Manual

OM Centrif Micro ΙΙ-5 63
Table 24, Compressor Setpoints
Description Default Range PW
Unit (Duplicates)
Unit Enable OFF OFF, ON O
Unit Mode COOL COOL, ICE, HEAT, TEST
O
T
Cool LWT
44. 0°F 35.0 to 80.0 °F
O
Ice LWT
25. 0°F 15.0 to 35.0 °F
O
Heat LWT
135. 0°F 100.0 to 150.0 °F
O
Startup Delta T
3.0°F 0.5 to 10.0 °F
O
Shutdown Delta T
3.0°F 0.0 to 3.0 °F
O
VFD
Compressor VFD No No, Yes T
VFD Minimum Speed 70% 70 to 100% T
Speed @ 0 Lift 50% 0 to 100% T
Lift @ 100% Speed
40 °F 30 to 60 °F
T
Motor Amps
Demand Limit Enable OFF OFF, ON O
Minimum Amps 40% 5 to 80% T
Maximum Amps 100% 10 to 100% T
Soft Load Enable OFF OFF, ON M
Initial Soft Load Limit 40% 10 to 100% M
Soft Load Ramp Time 5 min 1 to 60 min M
Maximum LWT Rate
0.5 °F/min 0.1 to 5.0 °F/min
M
Minimum LWT Rate
0.1 °F/min 0.0 to 5.0 °F/min
M
Staging
Comp Stage Mode Normal
Normal, Efficiency, Pump,
Standby
M
Comp Stage Sequence # 1 1,2, … (# of Compressors) M
Maximum Compressors ON 1 1-16 M
Stage Delta T 1.0 0.5-5.0 M
Full Load Timer 120 sec 0 to 999 sec T
Nominal Capacity Per Comp 0 to 9999 T
Timers
Start-Start 40 min 15 to 60 min M
Stop-Start 3 min 3 to 20 min M
Oil
Oil Feed Temperature
100 °F 100 to 190 °F (Note 1)
T
Oil No Start Diff (above Evap Temp)
40 °F 30 to 60 °F
T
Templifier
Source No Start
70 °F 50 to 100 °F
T
Alarms
Evaporator Freeze Protection
34.0 °F -9.0 to 45.0 °F
T
Condenser Freeze Protetion
34.0 °F -9.0 to 45.0 °F
T
Low Evap Pressure-Stop 26 psi 10 to 45 psi T
Low Evap Pressure-Inhibit 38 psi 20 to 45 psi T
Low Evap Pressure-Unload 31 psi 20 to 45 psi T
High Discharge Temperature-Stop
190 °F 120 to 240 °F
T
High Discharge Temperature-Load
170 °F 120 to 240 °F
T
High Condenser Pressure 140 psi 120 to 240 psi T
Motor Current Threshold 10% 3 to 99% T
High Oil Feed Temperature
140 °F 120 to 240 °F
T
Low Oil Delta Temperature
30 °F 20 to 80 °F
T
Low Net Oil Pressure 40 psi 30 to 60 psi T
Surge Slope Limit
20 °F
1 to 99 Deg F/min T
Surge Temp Limit
7 °F 2 to 25 °F
T
Service
Vane Mode AUTO AUTO, MANUAL T
VFD Mode AUTO AUTO, MANUAL T
Hot Gas Bypass 30% 20 to 70% T
Unload Timer 30 sec 10 to 240 sec T
Postlube Timer 30 sec 10 to 240 sec T
Note 1: Through Version C, minimum value was 90°F.

McQuay TSC Specifications

General

Brand	McQuay
Model	TSC
Category	Controller
Language	English