Air Elimination Device; Low Water Cut-Off (Field Supplied); Applications - NTI FTVN085 Installation Start-Up Maintenance

G. Air Elimination Device
A micro bubble air elimination device must be installed in every boiler
installation. Automatic air vents alone are not an acceptable substitute
for a micro bubble air elimination device. Here are a few examples of
acceptable devices.
• Spirovent
• TACO 4900 Series
• Caleffi Discal
H. Low Water Cut-Off (Field Supplied)
This boiler is provided with a factory installed Water Pressure Switch. In the
event water pressure drops below 7 PSI, the control will go to a blocking
error "FILL - 108", inhibiting burner operation.
However, a low water cut-off may be required by local codes. This is to be
remote-mounted and field supplied. See Figure 13 for basic Low Water
Cut-Off installation instructions. Do not install an isolation valve between
boiler and low water cut-off.
When wiring the low water cut-off follow the installation instructions
provided by the low water cut-off manufacturer.
NOTE: During a low water condition, the field supplied low water cut-off
normally open contacts must break the main power supply to the boiler.
Failure to follow this instruction will defeat the purpose of a low water cut-
off and will result in damage to the boiler. Such damages are not covered
by boiler warranty.
I. Applications*
CAUTION
In mixed temperature applications, mixing valves are required for the
protection of low temperature loops.
Figure 14 - Piping Symbol Legend
Part 1 - General Safety Information
Figure 13 - Low Water Cut-Off Basic Installation
Part 4 - Water Piping
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