Boiler Location; Clearances; Chimney Requirements; Air Supply And Venting - Slant/Fin Liberty II LD-20 Installation And Operating Instructions Manual

LIBERTY

BOILER LOCATION

Provide a level, solid foundation for the boiler. Location should be
near the chimney so that the Flue Pipe Connector or Breeching to
the chimney is short and direct.
A. The foundation must be capable of supporting the weight of the
boiler when filled with water:
Boiler Approximate Total Weight of Boiler
Size Assembly, filled with water
LD-20
LD-30
LD-40
LD-50
LD-60
LD-70
B. The Liberty Boiler has full wet base sections which surround
fire-box for maximum heat absorbtion of burning fuel, and low
floor temperature.
C. If boiler is to be located over buried conduit containing electric
wires or telephone cables, consult local codes or the National
Board of Fire Underwriters for specific requirements.
MINIMUM CLEARANCE
Provide accessibility clearance of 24" from surfaces requiring
servicing (top and front) and 18" on any side requiring passage. The
boiler shall be installed with the following MINIMUM
clearances from combustible materials:
A. CHIMNEY CONNECTOR -18"
B. BACK AND SIDES - 6" EXCEPT as limited by 18" clearance
from chimney connector.
NOTE: Except in closets and alcoves, clearances above in (A) and (B)
may be reduced by providing forms of protection as specified in
NFPA31, latest edition.

CHIMNEY REQUIREMENTS

A. The chimney must be constructed in accordance with all local
applicable codes and the National Board of Fire Underwriters.
See boiler models and rating table shown on page 2 for
chimney sizes.
B. Check chimney condition.
Existing chimneys and stacks may have deteriorated; without re-
B ROMETRIC DR FT REGUL TOR
INST LLED ON HORIZONT L CONNECTOR
440
550
660
785
895
1000
pairs their use would be hazardous. Before connecting to an
old chimney or stack.
1. Clean it.
2. Inspect it thoroughly.
3. Remove obstructions.
4. Replace worn secctions of metal stacks.
5. Seal bad masonry joints.
6. Repair damaged linings.
C. Where more than one appliance vents into a common chimney,
the area of teh common breeching should at least equal the
area of the largest appliance flue plus 50% of the additonal flue
areas.
D. Breeching area must not be reduced at connection into chim-
ney. Breeching must be inserted into, but not beyond, inside of
chimney liner.
E. Chimney height shall extend at least 3 feet above where it
passes through the roof of the building, and at least 2 feet
above any ridge within 10 feet of the chimney.
F. The use of a vent cap, where permitted by code, gives addition-
al protection against adverse wind conditions and precipitation.
G. Flue Connection: Connect flue pipe between top of boiler and
chimney. Horizontal sections of flue pipe must be pitched up-
ward to the chimney at least 1/4" per foot. Flue must be inserted
into, but not extend beyond, the inside wall of the chimney flue.
Install draft regulator in flue pipe, as shown in figure 3.

AIR SUPPLY AND VENTING

Sufficient air for combustion and ventilation in the boiler room must
be provided. Failure to do this will result in poor combustion, heavy
spptomg and health hazards. Any oil-fired boiler must have a steady
draft* and an ample supply of combustion air at all times during firing.
If air supply or chimney draft* is unreliable, CO
change unpredictably.
DO NOT vent this boiler to the same chimney flue used by a fireplace
or coal or wood burning furnace or boiler. The draft* produced by solid
fueled devices varies tremendously between high fire and low fire:
In modern, weatherstripped, energy-saving buildings, natural infiltra-
tion may not supply enough air for combustion, particularly if other
fuel-burning appliances, exhaust fans or draft inducers are competing
for the same air supply. Fireplaces and other solid fuel burning appli-
ances consume great quantities of air while at high
B ROMETRIC DR FT REGUL TOR
INST LLED ON VERTIC L RISE
3
and overfire draft* will
2
Figure 3.
Barometric
Draft
Regulator