Sterlco M2B, Owner'S Manual

Page: 11 / 49

10
Display
• DELIVERY - The process display is showing the temperature of the
outgoing fluid.
• RETURN - The process display is showing the temperature of the
incoming fluid.
•
∆
T - The process display is showing the difference between delivery
and return temperatures.
• FLOW - The process display is showing the flow of the fluid in GPM or
LPM. Must have optional flow sensor.
Alarms
• FLUID PRESSURE - Fluid pressure low. Unit shuts down and will
resume operation when pressure is restored (disabled in oil units).
• SAFETY THERMO - Over temperature fault. Heater outputs are
disabled. Pump continues to operate and the “cool” solenoid is
energized. This is a fatal fault which requires the main power to be
disconnected to reset the M2B.
• HI/LO ALARM - The alarms can be set individually via the keypads. The
HI deviation is +200
o
F (+93.3
o
C) above the setpoint. The LOW
deviation is -100
o
F(-37.7
o
C) below the setpoint. Oil temperature
control unit alarms are set to “ ” as default and must be activated
through the keypad if needed. The alarm settings can be changed to
absolute, “
” in the secondary menu. Alarms reset automatically.
• PROBE FAIL - A temperature sensing probe has failed. A delivery probe
fail will display “ ” in the display. Failure of the return probe will
display “ ”. The alarm will reset when the probe is replaced.
• MOTOR FAIL - Improper pump rotation, motor out of phase or thermal
overload. This is a fatal fault which requires the main power to be
disconnected to reset the M2B (water units only).
Input Keypad
Depressing any program keypad (SETPOINT, HI ALARM, LO ALARM)
displays the stored value and allows the parameters to be adjusted. The
following programmable features are allowed by the M2B.
• PROGRAM SETPOINT - Depress and hold the SET POINT keypad and
either the UP or DOWN arrow to increase or decrease the set point
display.
• PROGRAM HI ALARM - Depress and hold the HI ALARM and either
the UP or DOWN arrows to set the alarm high limit. To disable the
function, set the limit out of range or go into the secondary menu by
depressing the UP and ENTER keys together. Use the index key to
access the “
” function. Use the UP or DOWN key to select “ ”.
Depress ENTER to accept the function change.
Note: The controller will automatically program a high alarm of +200
o
F
(+93.3
o
C) above set point and -100
o
F (-73.3
o
C) below setpoint.