Fulton VMP Hot Water (VMPW) - Manual (Page 17)

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SECTION 2
VMPW-IOM-2012-1001
INSTALLATION
2-11
boiler supply.
5. On multi-zoned systems (or a system with both space and domestic water
heating), air elimination must be provided either in the common piping or
on every loop.
6. When the boiler is installed at a higher level than baseboard radiation (if
used), air elimination must be provided directly above the unit.
Piping Specifi cations
For piping, the basic considerations are: the design temperature, the pressure
retained by the pipe, the fl uid in the pipe, the load resulting from thermal
expansion or contraction, impact or shock loads imparted such as water hammer,
external loads, wind loads and vibration from equipment.
Adhere to the following for piping installation:
1. Ensure the arrangement of the piping and its appurtenances takes into
consideration the location of other structures and equipment adjacent to
the piping, which may result in freezing interference and/or damage as a
result of expansion, contraction, vibration, or other movements.
2. Consider the appropriate location and orientation of valves necessary
for safe operation and isolation of the piping. Valves are used in piping
systems to stop and start the fl ow of fl uids, to regulate fl ow, to prevent the
back fl ow, and to relieve excessive pressure build up in the piping.
3. Ensure all piping and piping components are suitable for the design
temperatures, pressure and fl uid used in the system.
4. Ensure all pipework is constructed from seamless mild steel pipe, Schedule
40 or Schedule 80 as required by code and/or application; or copper if
system parameters allow.
5. During construction of the installation, ensure that no dirt, water, or
residue from welding is left in the system.
6. Provide expansion joints or properly designed and sited loops to
accommodate thermal expansion. Thermal expansion should be calculated
using the maximum possible utilization fl uid temperature, regardless of
whether the pipe considered is in the feed or return circuit. Steel pipe will
expand approximately 1 “ per 100’ over a 100° F temperature rise (1 mm
per meter over 100 C rise).
7. Provide supports and anchors for all pipes where necessary to prevent
undue stresses from being placed on items of equipment, including
pumps, valves, and the boiler. Supports and anchors which will not
interfere with thermal expansion should be chosen.
8. Cut screw threads carefully and accurately. If possible, new tools should be
used. It is recommended that GR5 or higher tensile steel bolts be used for
all fl anged joints.
9. Use gaskets to make all fl anged connections. Gasketing material must be
ã
WARNING
All information in this manual is for
reference and guidance purposes,
and does not substitute for required
professional training, conduct, and strict
adherence to applicable jurisdictional/
professional codes and regulations.
The vent line connection on the gas
pressure regulator must be piped to
outdoor air by the installer in accordance
with National Fuel Gas Code, ANSI Z223-
1-1991 or latest addenda. In Canada, gas
installations must be in accordance with
the current CAN/CGA B149.1 and 2 and/or
local codes.
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CAUTION
Some soap used for leak testing is
corrosive to certain types of metals. Use
an appropriate leak test solution. Clean all
piping thoroughly after completing the leak
check.