Ignition Safety System Test; Low Water Cut-Out Test - Harsco Industrial SC-1500 Owner's Manual

controls, lighting, and shut-down procedures.

3.10.1 Ignition Safety System Test

Test the ignition system safety shutdown as follows:
1. Cycle the boiler on by generating a heat request. (The
method for this will depend on your boiler configuration.)
2. During the pre-purge cycle (before ignition), smoothly close
the downstream manual isolation valve (inside the boiler
cabinet) to reduce the gas flow.
3. Closing the manual isolation valve will prevent a successful
ignition, and the NURO will display either:
109: "Ignition Failed"
110: "Ignition Failure Occurred"
These alarms indicate an ignition failure and the lockout will remain until the control is reset. After completing
this test, turn the boiler off, open the downstream manual isolation valve, then turn the boiler back on.

3.10.2 Low Water Cut-out Test

The boiler is furnished with a probe-type low water cut-out. The probe is installed near the boiler's outlet in
order to detect the presence of water at the highest possible location in the boiler and is connected to the low
water cut-out circuit board by a single wire. The low water cut-out circuit board is located inside the boiler's front
door, toward the top of the control panel and is identified with a yellow label.
In order to test the low water cut-out, press and hold the red "Push to Test" button for at least 5 seconds. A
manual lockout reset error displaying
The red indicator on the Low Water cut-off will no longer be illuminated.
LED
Optional Test Method: First turn the boiler off, and then turn off the boiler's circulating pump. Isolate
the boiler from the system. Drain the water level below the low water cut-off probe. Turn the boiler
back on. It should not operate, and a manual lockout reset error displaying
on the NURO touchscreen should occur. The red
be illuminated.
Return the system to normal operation by refilling with water, restarting the boiler's circulating pump, and then
turning the boiler back on.
10010: "Low Water Limit"
LED
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The user should become
thoroughly familiar with the
operation of the boiler and
controls before attempting to
make any adjustments.
Changing parameters requires
an understanding of the
parameters and the
functionality of the boiler. The
boiler may not function properly
if parameters are changed from
the factory values.
on the NURO touchscreen should occur.
10010: "Low Water Limit"
indicator on the Low Water cut-off will no longer
Gas Fired Boiler