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MinimumVentPipeClearance
ff theventpipemustgothrough a
crawlspace, d ouble wall v entpipe
should beused. W here ventpipe
passes through a combustible w ail
or partition, Use a ventilated metal
thimble. The
thimble should be 4
inches larger in diameter than the
vent pipe. If boiler is installed with a
single wall galvanized type vent, it
must have 6" clearance between its
surface and any combustible materi-
al. If Underwriters Laboratories list-
ed type B (insulated vent pipe) is
used, clearance between it and
combustible material to be as listed.
In lieu of thimble protection, all com-
bustible material in the wall shall be
cut away from the vent pipe a suffi-
cient distance to provide the clear-
ance required from vent pipe to
combustible material. Any material
used to close up such opening shall
be non-combustible.
For boilers for connection to gas
vents or chimneys, vent installations
shall be in accordance with Part 7,
Venting of Equipment, of the
National Fuel Gas Cede, ANSI
Z223.1--Latest
Edition, or applica-
ble provisions of the local building
codes.
Automatic Vent Damper
The GA100 Series of boilers are fit-
ted with an integral vent damper
which is operated by an actuator
mounted on the front panel (See
Fig. 1).
The stack damper should be
checked for alignment and freedom
of operation prior to installation and
during subsequent routine service.
6. System Piping
Boiler
Place the boiler in a selected loca-
tion (as near chimne_yy as possible).
Your boiler is shipped assembled.
You need only to install a ¾" relief
valve drain line. Run a pipe from the
relief valve outlet to an open drain,
tub or sink, or other suitable
drainage point not subject to freez-
ing. Failure to do so may cause
water damage or injury should the
relief valve open. Pipe must be
_'ame size as outlet and open end
must not be threaded.
Connect supply and return lines to
boiler. The connections may require
certain additional fittings and parts
as shown on Fig. 2.
If you are replacing an old boiler
with this new one, possibly all you
will need to do is to connect the
existing piping to your boiler.
If you are installing an entire new
heating system, first install all of
your radiation units (panels, radia-
tors, or cabinets) and the supply
and return mains--then make the
connection to the boiler.
When connecting the cold water
supply to the water valve, make
sure that a clean water supply is
available. When the water supply is
from a well or a pump, a sand
strainer should be installed at the
pump.
When boiler is used in connection
with refrigeration systems, it shall be
installed so that the chilled water is
piped in parallel with the heating
boiler with appropriate valves to pre-
vent the chilled water from entering
the heating system boiler.
The boiler piping system of a hot
water heating boiler connected to
heating coils located in air handling
units where they may be exposed to
refrigerated air circulation must be
equipped with flow control valves or
other automatic means to prevent
gravity circulation of the boiler water
during the cooling cycle.
NOTE: A hot water boiler installed
above radiation level must be pro-
vided with a low water cutoff device
at the time of boiler Installation.
It is recommended that the boiler be
installed with gate valves on the
supply and return lines so that it
may be removed for service without
draining the entire system. The gate
valve on the supply pipe must not
be located between the boiler and
the relief valve or expansion tank.
Water Heater
The relief valve and drain valve for
the flow and for the hot water tank
(Fig. 2) are packed in separate
boxes and mount directly to the flow
and return.
If the selected temperature at the
temperature control (Fig. 1, No. 1) is
in excess of 125°F a mixing valve
should be installed to minimize the
danger of scalding.
7. Gas Supply Piping
INSTALL GAS PIPING AS OUT-
LINED IN THE AMERICAN
NA't'IONAL STANDARD ANSI
Z223.1-1984--
NATIONAL GAS
FUEL CODE FOR U.S.A. INSTAL-
LATIONS
The gas pipe to your boiler should
run direct from the gas meter (or
propane regulator). It should supply
only the boiler. It must be the cor-
rect size for the length of the run
and the boiler rating. See Fig. 3 for
the proper size. Be sure your gas
line complies with local codes and
the gas company requirements.
Connecting the Gas Piping
Refer to Fig. 1 for the general layout
at the boiler. It shows the basic fit-
tings you will need. The gas line
enters the boiler from the back. The
following rules apply:
1. Use new, properly cleaned
black iron piping and fittings,
free from chips.
2. Apply good quality pipe dope to
pipe only, leaving 2 end threads
bare.
3. Install a sediment trap to trap
dirt and moisture before it can
enter the boiler.
4. Install a manual shut-off valve in
vertical pipe about 5 feet above,
floor (not supplied by Vaillant).
5. Tighten all joints securely.
6. Propane gas connections
should only be made by a
licensed propane installer.
7. The boiler and its individual
shut-off valve must be discon-
nected from the gas supply pip-
ing system during any.pressure
testing of that system at test
pressures in excess of ½ psig.
8. The boiler must be isolated from
the gas supply piping system by
closing its individual manual
shutoff valve during any pres-
sure testing of the gas supply
piping system at test pressure
equal to or tess than ½psig
(3.5KPa).
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