Legacy Stoves VF2500, Инструкция по установке и эксплуатации

Страница: 11 / 37

When you measure the draft, it is best if the
furnace has been operating with suMcient time for
the furnace and chimney to warm up. Burning for at
least thirty minutes will provide for this.
e draft
reading is best taken 18” up from the center of the
Lue outlet, in the connector pipe. Drill a hole in the
pipe for the meter tube, and 6ll it with a screw or
silicone when done with the test.
Venting Guidelines
Your Legacy Stoves hot-air furnace must be vented
to it’s own separate Lue. is must be a lined “Class
A” chimney. If the chimney is a listed manufactured
chimney, it is not to be less than 6 inches in diameter
for the VF2500/VF2500 Plus.
e chimney must be
capable of providing a draft reading of at least -.06”
water column on a draft meter, in order to function
properly.
e minimum recommended height for solid fuel
chimneys is 16 feet from the furnace collar. e
chimney must be two feet higher than anything
within ten feet. It also must extend three feet above
the point where it intersects or exits the roof line.
The three foot, two foot, ten foot rule
In order to have a properly operating solid fuel
heating system, the chimney must be capable of
providing the necessary draft.
e minimum required
draft is -.06 inches of water column (WC). is must
be measured using a draft gauge. If the chimney
cannot supply this constant draft, the furnace will not
operate properly. A barometric damper may be used
and properly adjusted to compensate for excessive
draft only.
Combustion Air (Make Up Air)
e airLow through the system and out the
chimney means that oxygen is leaving the home and
will create an oxygen de6cit if this air is not replaced.
Adequate combustion air is critical for the
performance of your heater.
ere is usually suMcient
leakage in older homes to provide for this, but in well-
insulated homes it may be necessary to provide
additional outside air into the home. Combustion air
can be provided with a duct to the outside. A louvered
vent can also be used.
The airflow through the system and
out the chimney means that oxygen
is leaving the home and will create
an oxygen deficit if this air is not
replaced.
Types of Chimneys
e chimney is one of the most important, yet
most neglected and misunderstood portions of any
solid fuel burning heater installation. Where an
existing chimney is used, it must be large enough to
provide a draft adequate for removing gaseous
products of combustion.
From NFPA 211 2013:
1. e cross-sectional area of the chimney
system must not be less than that of the Lue
collar.
2. Chimney systems which are completely
internal below the roof line must be no more
than three times the cross-sectional area of the
Lue collar (28.3 in
2
X 3 = 84.8 in
2
).
3. Chimney systems which are exposed to the
exterior on one or more sides below the roof
line must be no more than two times the
cross-sectional area of the Lue collar (28.3 in
2
X 2 = 56.5 in
2
).
- 11 -