24
Optional Electric Water Level Control Package
As an option, an electric water level control package is available in lieu of the mechanical
make-up assembly. The package consists of a probe-type liquid level control assembly
and a slow-closing solenoid valve. Stainless steel electrodes, factory-set at predetermined
lengths, extend from an electrode holder into the cold water basin. For more information,
refer to the Electric Water Level Control Operation & Maintenance Manual available at
www.BaltimoreAircoil.com.
• Clean the stainless steel electrodes periodically to prevent accumulations of scale,
corrosion, sludge, or biological growth, which could interfere with the electrical circuit.
• The water level is maintained at the recommended operating level regardless of the
system thermal load. Therefore, it is not recommended that the operating level be
adjusted.
• During the start-up of units equipped with the electric water level control package,
bypass the control unit in order to fill the unit to the overflow connection.
L.E.D. Status Codes
•
Steady one second flashing:
Indicates dirty probes, reading in the capacitance mode.
The unit will still operate but will give the following status code of 1 second on, 1
second off (steady 1 second flashing). This status code continue until the probes are
cleaned and the power has been reset. Note: No other status codes will be displayed
until the dirty probes are cleaned.
•
Two flashes and off for 5 seconds
: Indicates make-up valve ran for more than 1 hour.
The unit will continue to fill, with the following status code of 1 second on, 1 second
off, 1 second on and then off for 5 seconds before repeating. This status will continue
until power has been reset. Possible causes: leaking tank, obstructed fill / defective
valve or reduced flow rate.
•
Three flashes and off for 5 seconds
: Indicates shorted probes or highly conductive
water. The unit will continue to operate but will give the following status code of 1
second on, 1 second off, 1 second on, 1 second off, 1 second on and then off for 5
seconds before repeating. This status will continue until the water is diluted or the
short is removed from the probes and power is reset.
•
Four flashes and off for 5 seconds
: Indicates black probe (P6) reads covered, but
white probe (P5) does not read covered (white should also be covered because it is
longer than the black). This will cause the fill solenoid valve to short cycle and lead to
premature failure of the fill valve. The unit will short cycle and give the status code of
1 second on, 1 second off, 1 second on, 1 second off, 1 second on, 1 second off, 1
second on and then off for 5 seconds before repeating. The unit will continue to short
cycle until the condition has been corrected (clean white probe) and the power reset.
•
L.E.D. on steady
: Indicates normal operation.
•
L.E.D. does not come on after power up or resetting power
: Indicates unit inoperative.
