34 OM Centrif Micro ΙΙ-5
MOTOR Setpoint Screen
Figure 19, MOTOR Setpoint Screen
Table 17, MOTOR Setpoint Settings
Description No. Default Range
Pass-
word
Comments
Lift @ 100% Speed 15
40 °F 30 to 60 °F
T Temp lift at 100 % speed (cond sat – evap sat temp)
Speed @ 0 Lift 14 50% 0 to 100% T Lift @ min speed as a % of 100 % lift
Minimum Speed 13 70% 60 to 100% T Min VFD speed, has priority over SPs 11 & 12
VFD 12 No No, Yes T VFD on unit or not
Oil No Start Diff
(above Evap Temp)
11
40 °F 30 to 60 °F
T
Minimum Delta-T between oil sump temperature
and saturated evaporator temperature
Nominal Capacity 10 0 to 9999 Tons Determines when to shut off a compressor
Maximum Rate 9
0.5
°F/min
0.1 to 5.0
°F/min
M
Inhibits loading if LWT change exceed the setpoint
value.
Minimum Rate 8
0.1
°F/min
0.0 to 5.0
°F/min
M
Additional compressor can start if LWT change is
below setpoint.
Soft Load Ramp 7 5 min 1 to 60 min M
Time period to go from initial load point (% RLA) set
in SP 5 to 100% RLA
Initial Soft Load Amp
Limit
6 40% 20 to 100% M Initial amps as % of RLA
Soft Load Enable 5 OFF OFF, ON M Soft load on or off
Nameplate RLA 4 Not used on WSC/WDC models
Maximum Amps 3 100% 40 to 100% T % RLA above which loading is inhibited (Load Limit)
Minimum Amps 2 40% 20 to 80% T % RLA below which unloading is inhibited
Demand Limit Enable 1 OFF OFF, ON O
ON sets %RLA at 0% for 4 mA external signal and
at 100% RLA for 20 mA signal
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