Pressure Relief Valve - Laars FT Series Installation And Operation Instructions Manual

The FT Series Heating Only, Boiler

4.15 Pressure Relief Valve

External pressure relief valves must be installed.
Observe the following. Failure to comply with the
guidelines on installing the pressure relief valve and
discharge piping can result in personal injury, death
or substantial property damage.
This boiler is provided with 30 psi safety relief valve
that complies with the ANSI/ASME Boiler and
Pressure Vessel Code, Section IV ("Heating Boilers).
(Model : CASE ACME F-82)
This safety relief valve (30 psi) is shipped loose for
field installation.
For safety, the relief valve(s) must be installed as
close to the boiler as possible on the boiler supply
pipe and not removed or plugged. Failure to comply
with the guidelines on installing the pressure relief
valves and discharge piping can result in personal
injury, death or substantial property damage.
Direct the discharge piping of the pressure relief
valve so that hot water will not splash on anyone or
any nearby equipment. Attach the discharge line to
the pressure relief valve and run the end of the line
within 6-12" (150-300mm) of the floor.
Test the operation of the valve after filling and
pressurizing system by lifting the lever. Make sure
the valve discharges freely. If the valve fails to
operate correctly, replace it with a new relief valve.
Ensure that the discharge capacity of the pressure
relief valve is equal to or greater than the maximum
pressure rating of the boiler.
Ensure that the maximum BTU/H rating on the
pressure relief valve is equal to or greater than the
maximum input BTU/H rating of the boiler.
Pressure Relief Valve must be installed on the CH
supply line as close to the unit as possible. (CH
supply line: maximum 30psi). No other valves should
be placed between the pressure relief valve and the
appliance.
This appliance has a high-temperature shut off switch
built in as a standard safety feature .Therefore a
"pressure only" relief valve is required.
WARNING
Do not operate this appliance before the pressure
relief valve supplied is installed with sufficient
relieving capacity in accordance with the ASME
Rating Plate on the boiler.
WARNING
DO NOT install a CH pipe line relief valve with a
pressure higher than 30 psi. This is the maximum
allowable relief valve setting for the boiler.
Page 47
3/4" 30 psi Relief Valve