NTI FTVN - Air Elimination Device; Low Water Cut-Off (Field Supplied); Applications

25
Part 1 - General Safety Information
Part 4 - Water Piping
I. Applications*
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
• Cale Discal
In mixed temperature applications, mixing valves are required for the
protection of low temperature loops.
CAUTION
Figure 12 - Low Water Cut-O Basic Installation
Figure 13 - Piping Symbol Legend
H. Low Water Cut-O (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-o may be required by local codes. This is to be
remote-mounted and eld supplied. See Figure 12 for basic Low Water
Cut-O installation instructions. Do not install an isolation valve between
boiler and low water cut-o.
When wiring the low water cut-o follow the installation instructions
provided by the low water cut-o manufacturer.
NOTE: During a low water condition, the eld supplied low water cut-o
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-
o and will result in damage to the boiler. Such damages are not covered
by boiler warranty.