MRO 3 & 4 MANUAL
34
98-0140
Rev. F
SETPOINT
DESCRIPTION
RANGE
FACTORY
SETTING
Flush Interval
The interval between flush cycles. Only valid
with operation hour, elapsed time or off flush
types.
0-99
minutes
0
Flush Mode
Selects if the inlet and RO pump relays
operate during flush.
1-4
0
Maximum Hours
If the current operating hours exceed this
limit, the operating hours warning will occur.
To disable, set to 0.
0-65000
hours
0
Current Hours
Current number of hours of RO system
operation.
0-65000
hours
0
Expander Mode
Not Used
Temp Offset
Allows adjustment of temperature reading by
±5
°
F.
+ 5
0
Temp UOM
Selects display of temperature in
°
F or
°
C
0-1
0
Switch Select
Selects if switch inputs are normally open or
normally closed.
0-32
0
TDS/Cond UOM
Selects display of water quality in µS or PPM
NOTE: If this Set point is changed, the unit must be
recalibrated.
0-1
0
TDS/Cond Range
Selects range of TDS/Conductivity monitor0-
50, 1-100, 2-250, 3-500, 4-1000, 5-2500, 6-
5000.
NOTE: If this Set point is changed, the unit must be
recalibrated.
0-6
1
C2 Range
Selects range of TDS/Conductivity monitor 0-
50, 1-100, 2-250, 3-500, 4-1000, 5-2500, 6-
5000.
NOTE: If this Set point is changed, the unit must be
recalibrated and range components may need to
be changed.
0-6
4
C2 Limit
When this value is met or exceeded, the
alarm lamp will light and high TDS/Cond will
show on the display. To disable, set to 0.
NOTE: If the incoming feed water is greater than 1000 µS (i.e. C2 Range is set to 5 or 6), first turn the
Write Protect off by moving the Write Protect chip in the controller to the off position. Then change the
value of C2 Range to either 5 or 6. Next, remove the resistor in the controller in the R10 position (note
that it has not been soldered in place) and place the resistor in the R9 position (also not soldered in
place) into the now vacant R10 position. Finally, recalibrate the unit using a conductivity meter.
NOTE: If this Setpoint is changed, the unit must be recalibrated and range components may need to be
changed.
%Rej
The 2
nd
TDS/Conductivity is used to monitor 0-1 feed water,
programming this set point to 1 allows the % rejection to be displayed.
Summary of Contents for MRO3
Page 8: ...MRO 3 4 MANUAL 5 98 0140 Rev F SECTION 3 COMPONENTS AND SCHEMATICS 3 1 EXTERNAL FRONT VIEW...
Page 10: ...MRO 3 4 MANUAL 7 98 0140 Rev F 3 2 INTERNAL REAR VIEW...
Page 12: ...MRO 3 4 MANUAL 9 98 0140 Rev F 3 3 ELECTRICAL DIAGRAM MRO3 MRO4...
Page 13: ...MRO 3 4 MANUAL 10 98 0140 Rev F 3 4 FLUID DIAGRAM MRO3 MRO4...
Page 34: ...MRO 3 4 MANUAL 31 98 0140 Rev F FIGURE 6 2...
Page 35: ...MRO 3 4 MANUAL 32 98 0140 Rev F FIGURE 6 3...
Page 52: ...MRO 3 4 MANUAL 49 98 0140 Rev F SECTION 11 MRO3 4 SPARE PARTS LISTING...
