8
PART NO.
24861
REV
A.0
INSTALLATION AND OPERATION MANUAL |
TO SAVE THE NEW VALUE
After changing parameters, hold the magnet over the magnetic
switch for 3 seconds. The green LED turns off then flashes a
brief message (3 short pulses and a long pulse), and return to
normal mode. This can be done even if the parameters have
not been changed.
TO ABANDON THE PROCESS WITH NO CHANGES
Allow the LCD-8 to sit for two (2) minutes. The unit will flash the
green LED quickly for 2 seconds and return to normal
operation, displaying a steady green LED. This can be done at
any time in the process.
NOTE: changes to the operating temperature or the state of
the low- temperature lockout take effect immediately.
Changing the hold-on time does not affect any active hold-on
cycles; new values will be used the next time a hold-on cycle
initiates.
POST–INSTALLATION LCD-8 TEST
Most problems result from installation errors. Before testing,
verify that unit is prop- erly installed.
Connect power to snow melting system. Wait 15 seconds;
system should not actuate.
Using ice water or other cooling agent, cool ambient air
temperature sensor to below 38°F (3.3oC); system should
not actuate. Apply moisture to moisture sensing grid.
System should actuate in less than 15 seconds.
Dry moisture sensing grid. Disconnect power to snow
melting system. Wait 1 minute, then reconnect power. If
system actuates, ensure sensing grid is dry and ambient air
temperature is above 38°F (3.3°C), then repeat this step.
1.
2.
3.
TO ENTER THE CONFIGURATION PROCESS
The unit will flash the values of the three Field parameters in
order, repeatedly. The pattern begins with:
The four (4) second gap helps the user identify Field 1, the
starting point of the sequence, even after the sequences of
pulses have repeated several times. The LCD-8’s default
configuration is represented in Figure 6, above.
After changing the parameters of any field, the LCD-8 returns
to the display mode.
Hold the magnet to the switch for 3 seconds
The green LED will go off
Remove the magnet
Process begins
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TO CHANGE A FIELD’S PARAMETERS
Hold the magnet to the switch during the pause after that field.
The green LED turns and remains on until the magnet is
removed. That sets the value to 1. Positioning the magnet on
again, the LED turns on, then remove the magnet: that sets that
value to 2. Continue in this fashion.
There are two (2) seconds between swipes. After 2 seconds, the
LCD-8 main- tains the entered value and returns to display
mode. If a value exceeds parameters, the green LED flickers
briefly and returns to displaying the previous values.
Note: if the magnet is held for 3 seconds during the process of
setting a value (having been released at least once), the green
LED flickers briefly and restarts the display process.
Field 1’s green LED pulses
2 seconds between Field 1 and Field 2
Field 2’s green LED pulses
2 seconds between Field 2 and Field 3
Field 3’s LED pulses
4 seconds between Field 3 and returning to Field 1;
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