LP-719 Rev. 000 Rel. 000 Date 6.25.20
22
RE-INSPECTION OF RELIEF VALVES: Relief valves should be
inspected AT LEAST ONCE EVERY THREE YEARS, and replaced
if necessary,
by a licensed plumbing contractor or qualified
service technician to ensure that the product has not been affected
by corrosive water conditions and to ensure that the valve and
discharge line have not been altered or tampered with illegally.
Certain naturally occuring conditions may corrode the valve and
its components over time, rendering the valve inoperative. Such
conditions can only be detected if the valve and its components are
physically removed and inspected.
Do not attempt to conduct an
inspection on your own.
Contact your plumbing contractor for a
re-inspection to assure continued safety.
FAILURE TO RE-INSPECT THE RELIEF VALVE AS DIRECTED COULD
RESULT IN UNSAFE TEMPERATURE AND/OR PRESSURE BUILD-UP
WHICH CAN RESULT IN PROPERTY DAMAGE, SERIOUS PERSONAL
INJURY, OR DEATH.
WARNING
!
I. Applications*
In mixed temperature applications, a mixing valve is required for the protection of low temperature loops.
Figure 12 - Low Water Cut-Off Basic Installation
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 12 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.
Figure 13 - Piping Symbol Legend
