INSTALLATION (continued) PAGE 13
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BOILER PLACEMENT REQUIREMENTS
• The boiler must be placed on a non-combustible floor, such as, a level concrete slab.
Many owners choose to raise the boiler 8” above the floor to make loading and cleaning
more convenient. Four inch solid concrete blocks are often used for this purpose.
• Boiler placement should permit as direct a chimney connection as is practical.
Consideration needs to be given to which boiler flue collar location you will be using -
the rear or the right side. In some cases, local code requires use of a separate flue for
each of the wood-fired and gas-fired boiler sections. In this case, you will need two
separate chimney flues and both rear the right side boiler flue collars. Tarm USA has flue
collars available should you need a second one. The EXCEL has been tested and listed
for use with a single chimney flue with either gas or oil backup, but local code dictates
what you will need to use.
• Refer to the diagram below for the required minimum clearances between the boiler and
combustibles or combustible surfaces. Smoke pipe clearances also are shown.
13
Code
Approved
Chimney
Minimum
Dimensions
8”x 8” flue
20 Feet
18” from rear of
boiler and from
smoke pipe to
all
combustibles
Boiler Clearances
Front--36”
Rear--18”
Left Side(burner)--24”
Right Side--12”
Boiler must have
adequate fresh
air supply
18” to Combustibles from smoke pipe
18”to Combustibles from top of
boiler
Barometric draft regulator
36” to Combustibles
Non-combustible floor
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