Bell & Gossett V51019 ISO-FLO Accessories - Manual (Page 3)

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5. After installation check all joints for leakage and retighten
where necessary.
OPERATING INSTRUCTIONS
(SHUTOFF VALVES)
The ball type shutoff valves will function as a service valve to
isolate hydronic equipment for repairs. To close the shutoff
valves move the formed handle a quarter of a turn until the
handle is perpendicular to the valve and piping.
To return the shutoff valve to the open position move the
formed handle one quarter of a turn until it is inline with the
valve body and system piping.
OPERATING INSTRUCTIONS
(Y-STRAINERS)
If strainer pressure drop becomes excessive accumulated dirt
should be blown down through the blowdown line (if installed)
to a drain. If a blowdown line is not installed see the service
instructions for removing and cleaning the strainer.
SERVICE INSTRUCTIONS
(SHUTOFF VALVES)
Periodically inspect the shutoff valves for signs of corrosion or
leakage. If stem leakage is observed the brass hex packing nut
should be tightened slightly until leak stops. If tightening the
packing nut does not stop the leak or signs of leakage are
noted elsewhere, the shutoff valve must be replaced.
SERVICE INSTRUCTIONS
(Y-STRAINERS)
If excessive pressure drop is noted across the Y-Strainer the
internal strainer has collected a lot of dirt and needs to be
cleaned. If a blowdown line was not installed or if blowing
down the strainer has not solved the pressure drop problem,
the Y-Strainer must be disassembled for cleaning.
To clean the strainer first isolate the Y-Strainer from the system
or drain the system. Allow the system to cool to 100˚F (38˚C).
Leave drains open while servicing the strainer.
Using the appropriate size wrench remove the brass nut on the
Y portion of the strainer. Grasp and remove the strainer. Clean
the strainer in water to remove collected debris. Replace the
strainer nut gasket with a new one. Reinstall the strainer and
the strainer nut. Pressurize the system and check for strainer
gasket leaks. If noted, slightly tighten nut until leakage stops.
Periodically inspect the Y-Strainer for signs of corrosion or
leakage. If corrosion or leakage is noted the Y-Strainer must be
replaced.
SERVICE INSTRUCTION (HOSE ASSEMBLIES)
Periodically inspect the hose for signs of leakage, corrosion or
deterioration of the rubber hose. If noted immediately replace
the hose assembly.
WARNING:
Twisted hose assemblies may rupture,
spraying hot and/or pressurized water. Use proper
installation methods to prevent twisting. Failure to follow
these instructions could result in serious personal injury,
death and/or property damage.
WARNING:
It is possible, depending on the age or
condition of the shutoff valve stem seal, for some
liquid to escape when closing the valve. Do not have
eyes or face directly above valve. Failure to follow these
instructions could result in serious personal injury.
WARNING:
Check for proper sealing when using as
an isolation valve. If the seal is not sealing properly,
liquid will continue to flow from the drain valves. In this
case, the shutoff valve must be isolated from the system
and replaced. Failure to follow these instructions could
result in serious personal injury, death and/or property
damage.
WARNING: Corrosion or leakage are indications
that the shutoff valve may be about to cause serious
damage. The shutoff valve must be replaced. Failure to
follow these instructions could result in serious personal
injury, death and/or property damage.
WARNING: Hot fluids and/or fluids under pressure
are a safety hazard. Do not service the strainer while
it is hot or under pressure. Failure to follow these instruc-
tions could result in serious personal injury, death and/or
property damage.
WARNING: Corrosion or leakage are indications
that the Y-Strainer may be about to cause serious
damage. The Y-Strainer must be replaced. Failure to fol-
low these instructions could result in serious personal
injury, death and/or property damage.
WARNING: Corrosion, leakage or deterioration are
indications that the hose assembly may be about to
cause serious damage. The hose assembly must be
replaced. Failure to follow these instructions could result
in serious personal injury, death and/or property damage.