OPERATING MANUAL FOR HEATSAN
98-0177A
Page 5
Conductivity
The Conductivity is shown on the top line after the unit operating status. When
the unit is in STANDBY, because of a shut down condition, the reading is
replaced with ‘----’. If the reading is over range, the reading is shown as ‘^^^^’
when in the OPERATE mode.
Operating Hours
The current operating hours are shown on the bottom line.
Temperature
The current water temperature is shown on the bottom line to the right of
operating hours. When the unit is in STANDBY due to a shut down condition,
the reading is replaced with ‘---‘.
Warning Messages
Warning messages are also shown on the second line. If any warnings are
active, the active warnings will alternate with the normal displays for the
bottom line. The following lists the warning messages.
HI COND - The Conductivity reading has exceeded the programmed limit.
Tank Full Operation
The unit can be operated with 1 or 2 level switches. With 1 level switch, the
switch is connected to the tank full high input. When this switch has been
active for 5 seconds, the unit will shut down on tank full. TANK FULL will show
on the display. When the tank full condition clears, the display will show TANK
FULL 99. The number is the tank full restart time and the unit will restart when
this delay times out.
For 2 level switch operation, the upper switch is connected to the tank full high
input and the lower switch is connected to the tank full low input. When both
switches are “open”, the MRO unit will start. The MRO unit will continue to run
when the water level rises, and while the lower switch becomes active
(closed). When the upper switch becomes active (closes), after the 5 second
delay, the MRO unit will shut down. TANK FULL will show on the display.
When the tank level drops and the upper level switch clears, the display will
show TANK FULL 99 and the MRO unit will remain off. The number is the
tank full restart time and the number will blink until the lower level switch
clears (opens). When the lower level switch clears (opens), the number will
remain steady and the MRO will restart when the delay times out.
