Solo Plus Instructions 1-800-782-9927 Version 12-13
Tarm Biomass · 4 Britton Lane · Lyme, NH 03768
Fig 3.1
The smoke pipe connecting the boiler to the chimney flue must be black or stainless, have a minimum
thickness of 24 gauge, and rise a minimum of ¼‖ per foot of run toward the chimney
(Fig3.1).
Smoke
pipe sections must be attached to one another with a minimum of three sheet metal screws. The smoke
pipe should not contain more than two 90º elbows (45º elbows are preferred over 90º elbows).
MASONRY CHIMNEYS: Masonry chimneys must be lined, either with code-approved masonry or
pre-cast refractory tiles, stainless steel pipe, or poured in place liner. Do not use an unlined chimney
FACTORY BUILT CHIMNEYS: Factory built chimneys must be tested and listed for use with solid-
fuel burning appliances to the High Temperature (HT) Standard (2100 ˚F (1148 ˚C )), UL 103, for the
United States and High Temperature (1200 ºF(650 ˚C)) Standard ULCS-629 for Canada. Factory-
Built chimneys must be installed as per the manufacturers instructions.
Strong winds blowing across the top of a chimney or a chimney which has a particularly strong natural
draft can cause the Solo Plus boiler to continue burning (heating) when the draft fan is off. This should
not be allowed to happen because it can cause creosote formation and/or overheating of the boiler. The
solution to this problem of excessively high or irregular draft is to use a barometric draft regulator in
the smoke pipe.
Installation requirements for a barometric damper (draft regulator).
The diameter of the draft regulator must be equal or greater than that of the chimney connector
.
The draft regulator should be installed as close as possible to the boiler, on the chimney con-
nection or on chimney itself.
The draft regulator adjustment should be made with a vacuum gauge, if possible, with the
boiler operating at full output. If the start-up is made in warm weather, a readjustment may be
necessary in cold weather.
If, at the maximum adjustment (maximum opening of the shutter of the draft stabilizer), the
draft is always higher than 0.05‖ (1.25 mm) of water column, a second draft regulator may be
required.
Recommended draft regulator locations are shown in
Fig 3.1
(position 1 or 2).
Boiler Installation & Start-up > Preparing the Chimney
Page 13
Examples of Barometric Dampers
Fig 3.2
¼" per ft
0-4
'
18" Clearance from
smoke pipe to all
combustibles
Min. 16"
above the
base of the
chimney
1
2
