30
OM 200MICRO
Menu 18, Pump Set Points
Item
Screen
Line
Display
Field
Range
Extended Name
Pmp 1 Only
Pmp 2 Only
Auto Lead
#1 Primary
1
Evap=Pmp 1 Only
1
#2 Primary
Evap Pump Selection Mode
Pmp 1 Only
Pmp 2 Only
Auto Lead
#1 Primary
1
2
Cond=Pmp 1 Only
1
#2 Primary
Cond Pump Selection Mode
Evap=
This value determines how the pumps will be controlled by the MicroTech. The controlling of
the pump
(s)
is optional.
Pmp 1 Only
—The pump designated as number 1 will be started and the second pump
(number 2)
will not be started if number 1 fails.
Pmp 2 Only
—The pump designated as number 2 will be started and the second pump
(number 1)
will not be started if number 2 fails.
Auto Lead
—The MicroTech will try and balance the operating hours between the two pumps by
starting the pump with the least amount of run time. In case of pump failure, the MicroTech will
start the next pump.
#1 Primary
—The number 1 pump will be started each time with number 2 as a standby. If pump 1
fails the standby pump will be started
.
#2 Primary
—The number 2 pump will be started each time with number 1 as a standby. If pump 2
fails the standby pump will be started.
Cond=
This value determines how the pumps will be controlled by the MicroTech. The controlling of
the pump
(s)
is optional.
Pmp 1 Only
—The pump designated as number 1 will be started and the second
pump (number 2)
will not be started if number 1 fails.
Pmp 2 Only
—The pump designated as number 2 will be started and the second pump
(number 1)
will not be started if number 2 fails.
Auto Lead
—The MicroTech will try and balance the operating hours between the two pumps by
starting the pump with the least amount of run time. In case of pump failure, the MicroTech will
start the next pump.
#1 Primary
—The number 1 pump will be started each time with number 2 as a standby. If pump 1
fails the standby pump will be started.
#2 Primary
—The number 2 pump will be started each time with number 1 as a standby. If pump 2
fails the standby pump will be started.
Press the "NEXT MENU" key and menu 19 will be displayed. When cooling tower control is desired,
up to four digital outputs may be used to stage multiple tower fans. An optional analog output is
available for tower bypass valve control. Separate temperature set points are provided for each
cooling tower stage. The first tower stage is turned on when the entering condenser water
temperature exceeds the stage 1 set point. Subsequent stages are turned on when the time since the
last stage change exceeds the minimum stage up time. The number of stages will no be increased
above the total number of tower stages defined in the cooling tower menu. The number of tower
stages is decreased when the entering condenser water temperature drops below the current stage set
point by more than the stage differential and the time since the last stage change exceeds the minimum
