A-Maize-Ing Heat NRP620-9, Installation Manual

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NRPIM620-9-20131212 Rev 1 Page 9 of 24
Listed Chimney
A listed chimney must be rated for solid fuel burning appliance, comply with NFPA Standard 211, and
all applicable building codes. Consult a qualified furnace installer and/or the local building inspector
to be sure the chimney and connections comply.
Masonry Chimney
An existing lined masonry chimney must be clean and inspected. All connections to the chimney
must comply with NFPA Standard 211 and all applicable building codes. Consult a local building
inspector and/or a qualified furnace installer to be sure the chimney and connections are safe and
compliant.
**IMPORTANT**
The following procedure for measuring and setting the proper chimney draft is probably the most
important installation procedure to follow for the proper operation of the A-Maize-Ing Heat
®
furnace.
The A-Maize-Ing Heat
®
furnace requires 0.02-0.04 inches water column draft (chimney draft) on low
fire, to assure proper operation. Low fire mode is when the thermostat is satisfied and fuel is not
being augered into the burner. When the chimney draft is too high, burner fire may go out. If the
chimney draft is too low, smoke may back up in the furnace and storage bin, causing a possible
hazard.
The supplied barometric regulator should be installed in the flue (as per the enclosed instructions) to
properly regulate 0.02-0.04 inches water column draft. The counter weight setting on the barometric
regulator regulates this setting. (See “ADJUSTING THE CONTROL” instructions on page 10.)
The chimney draft should never exceed 0.04 inches water column. On extremely tall chimneys or on
chimneys larger than 6” diameter, it may be necessary to install a second barometric regulator or to
reduce the outlet opening on the chimney to approximately 28 square inches or both to maintain the
required 0.02-0.04 inches water column draft.