Laars MASCOT LX, Руководство по обслуживанию

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56
Mascot LX Service Manual
Low Water Cutoff Switch (continued)
Checking for an Actual Low Water
Condition
1. Check the water supply, water pressure, and auto
makeup valve.
2. This controller can sometimes produce a false
positive reading if the system uses ultra-pure water.
Very pure water will not conduct electrical current,
and will affect the reading from the probe.
Resetting the Low Water Cutoff
The Low Water Cutoff can be reset without removing it
from the Mascot LX.
1. Remove the upper front panel on the Mascot LX.
2. Unplug the connector on the front of the Low Water
Cutoff.
3. Wait 30 seconds.
4. Plug in the connector again.
Removing and replacing the unit
Tools and equipment required:
• Teflon® tape
1. Turn off power to the unit. Use the main disconnect
switch on the front panel.
2. Isolate the boiler. Turn off the water shutoff valves
located upstream and downstream of the unit.
3. Drain the boiler.
4. Remove the upper front panel on the unit.
B19
cont.
5. Disconnect the wires running to the front of the unit.
6. Turn the assembly by counter-clockwise by hand to
remove it. You should not need to use a wrench.
7. To reassemble, reverse the procedure we have just
described. Keep these points in mind as you do this:
• Use two or three wraps of Teflon
®
tape on the
threaded part of the assembly. Do not use pipe
dope or any other kind of sealant.
• Start the thread carefully so you do not cross-
thread the parts.
• Hand-tighten only. Do not use a wrench.
• Be sure the wiring connector is seated firmly.
Procedure - Cleaning the probe
Clean the probe whenever you see the amber signal on
the Service LED.
1. Remove the low water cutoff as described above.
2. Clean the probe by wiping it with a clean cloth.
3. Replace the low water cutoff as described above.
4. If, after the probe is cleaned, the low water cutoff
does not operate normally, replace the unit.