Tunstall Macon STV Series Manual page 147

INSTALLATION & OPERATING INSTRUCTIONS
PRESSURE TEMPERATURE PORT ( PT ) / PRESSURE TEMPERATURE VENT ( PTV )
PT Ports and PTV are typically factory installed.
Factory installed accessories (PT Port, PTV, Vent and
Drain Valve) are installed with a hydraulic sealant and
should not be disturbed. If it is absolutely necessary to
remove, tighten and/or adjust an accessory, it should
be cleaned and resealed with new sealant and/ or
Teflon tape.
Care should be taken not to over tighten.
Field installations are done in accordance with general
plumbing/fitting practices. Pipe dope or Teflon tape
should be used to seal threads.
Do not expose PT Ports and PTV to soldering,
brazing or weld heat. Complete this work before
installing the PT Ports and/or PTV.
The PTV should always be installed in a vertical
position.
It is preferable to install the PT Port horizontally
or higher.
Do not install down at the 6 o'clock position.
SAFETY INSTRUCTIONS
Seals are made of EPDM. EPDM is compatible with hot
and cold water. EPDM is resistant to: glycol, alcohol,
phosphates, esters, ketones and detergents.
Do not use with : Petroleum products, hydrocarbons
solvents and/or oils, chlorinated hydrocarbon or
turpentine.
Always wear eye protection when using PT Ports
an d /or PTV.
Attach a drain hose to the hose barb connection
for collecting water or water vapor from the PTV.
Always use a pressure gauge with a rating greater
than the pressure in the system.
Recommended for use in hydronic systems only.
Not recommended for gas, steam or high
temperature hot water.
OPERATION
PTV Venting:
Venting is achieved by rotating the valve body ½ turn
or until you hear air escape. Close valve when venting
is completed.
PT Port and PTV Temperature/Pressure Readings:
Remove cap slowly, look and listen for leaks.
Remove any foreign material from the entrance hole.
Select either the pressure or the temperature device to
be used. Examine the probe and remove any existing
burrs. Apply silicone lubricant to the probe, especially
for first time use. Insert probe slowly with a twisting
motion. As soon as the necessary readings and
adjustments are made, remove the probe
and replace cap.
MAINTENANCE
If the device leaks persistently, replace it.
Keep debris out of the device and keep caps on.
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Tunstall Corporation
118 Exchange Street
Chicopee, MA 01013
Form # IOM-03.14