20
OM 200MICRO
approach temperature. This temperature is calculated by subtracting the evaporator refrigerant
temperature from the evaporator leaving water temperature.
Press the "NEXT ITEM" key and screen 3 will display additional information. Line 1, field 1 indicates
the compressor lift pressure. This value is calculated by subtracting the evaporator pressure from the
condenser pressure. This indicates the work by the compressor.
Menu 3, Refrigerant Temps/Press
Item
Screen
Line
Display
Field
Range
Extended Name
1
Saturated Evap=xx.x°F/xx.xpsi
1
Saturated Refg Evap Temp/Press
2
Saturated Cond=xx.x°F/xx.xpsi
1
Saturated Refg Cond
Temp/Press
Suct Line=xx.x°F
1
Suction Line Refg Temp
1
3
Liquid Line=xx.x°F
2
Liquid Line Refg Temp
Suct Suprht=xx.x°F
1
Suction Superheat
1
SubCool=xx.x°F
2
Liquid SubCooling
Discharge=xx.x°F
1
Discharge Temp
2
Cond Apprch=xx.x°F
2
Condenser Approach Temp
Dsch Suprht=xx.x°F
1
Discharge Superheat
2
3
Evap Apprch=xx.x°F
2
Evap Approach Temp
1
Lift Press=xx.xpsi
1
System Lift Pressure
3
2
Lift Temp=xx.x
F
1
System Lift Temperature
Press the "NEXT MENU" key and Menu 4
(Motor Amps)
will be displayed. Menu four has one
screen. Line 1, field 1 indicates the percent rated load amps. This value is calculated by comparing
measured run amps with a full load amp value entered by the start-up technician. Line 2, field 1
indicates the actual motor amps as measured by a current transformer on one leg of the compressor
wiring. Line 3, field 1 indicates the amp limiting value if limiting is being enforced by the control
software. Pressing the switch key will toggle between this menu and Menu
13 (MotorAmp Set
Points)
. This allows the operator to compare actual operating conditions versus set points.
Menu 4, Motor Amps
Item
Screen
Line
Display
Field
Range
Extended Name
1
% Rated Ld amps=xx.x%
1
Percent Rated Load Amps
2
Motor Amps=xxxx
1
Actual Motor Amps
1
3
Limit=xxx
1
Effective Amp Limiting
Press the "NEXT MENU" key and Menu 5 (Oil Temperatures) will be displayed. Menu five has one
screen. Line 1, field 1 indicates the oil vent pressure as measured with a pressure transducer in the oil
sump housing. Line 1, field 2 indicates the oil temperature in the oil sump as measured with a
thermister located in the oil sump housing. Line 2, field 1 indicates the oil feed pressure as measured
by a pressure transducer in the oil line of the oil pump discharge. Line 2, field 2 indicates the
temperature of the oil as measured by a thermister in the oil line after the oil cooler. This is the
temperature of the oil that is supplied to the compressor for lubrication. Line 3, field 1 indicates the
net oil pressure as calculated by subtracting the evaporator pressure from the oil feed pressure. This
indicates the actual oil pump pressure. Pressing the switch key will toggle between this menu and
Menu 21
(Oil Set Points)
. This allows the operator to compare actual operating conditions versus set
points.
Menu 5, Oil Temperature
Item
Screen
Line
Display
Field
Range
Extended Name
Vent Press=xx.xpsi
1
Oil Vent Pressure
1
Sump Temp=xx.x°F
2
Oil Sump Temp
Feed Press=xx.xpsi
1
Oil Feed Pressure
2
Feed Temp=xx.x°F
2
Oil Feed Temp
1
3
Net Press=xx.xpsi
1
Oil System Net Pressure
