Solo Plus Instructions 1-800-782-9927 Version 12-13
Tarm Biomass · 4 Britton Lane · Lyme, NH 03768
3.2.1 Outside Combustion Air
Provision for outside combustion air may be necessary to ensure that fuel-burning appliances do not
discharge products of combustion into the house. Guidelines to determine the need for additional
combustion air may not be adequate for every situation. If in doubt, it is advisable to provide addi-
tional air.
Outside air may be required if:
1.
The solid fuel fired appliance does not draw steadily; experiences smoke roll out from the
loading door, burns poorly, or back-drafts whether or not there is combustion present.
2.
Existing solid fuel fired equipment in the house, such as fireplaces or other heating appliances
smell, do not operate properly, suffer smoke roll out when opened, or back-draft whether or
not there is any combustion present.
3.
Any of the above symptoms are alleviated by opening a window slightly on a calm (windless
day.
4.
The house is built very tightly with a well sealed vapor barrier or foam type insulation and
tight fitting windows and/ or has any powered devices which exhaust in the house.
5.
There is excessive condensation on windows in the winter.
6.
A non-balancing ventilation system is installed in the house.
7.
Where fans are used in the fuel storage area, they should be installed so as not to create nega-
tive pressures in the room where the boiler is located.
If these, or other indications, suggest that infiltration air is inadequate, additional combustion air
should be provided from the outdoors.
Solo Plus boilers are not suitable for direct connection to outside air. Outside air should be ducted to
no closer than 12‖ (305 mm) from the boiler. A 6‖ ( 152 mm) duct should be large enough for all sizes
unless the duct run is over 25 feet (7.6 m).
If a mechanical ventilation system (air exchange or heat recovery) is already present in the home it
may be able to provide sufficient combustion make-up air for the solid fuel fired appliance. The venti-
lation system may need to be re-balanced after installation of the Solo Plus.
3.3 Setting the Boiler
3.3.1 Receiving the Boiler
Boilers are shipped on a single skid. Loose materials are consolidated into boxes strapped to the skid
or placed inside the combustion area of the boiler. Please unpack the boxes and verify that the items
on the checklist have been supplied with the boiler (separate checklist is located on page 14). Make
certain that any damage or shortage is noted to the shipping receiver.
To move the unit into the boiler room the lift ring on the top of the boiler can be used.
To move the boiler around the inside of the boiler room rollers can be used under the boiler.
Boiler Installation & Start-up > Outside Combustion Air
Page 14
NOTE
Canadian installations must conform to ANSI/NFPA outside air requirements of 1 sq. inch
(2.5 cm) per 1,000Btu/hr (.30 kW/hr).
