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DAKA Furnace Model 622
2008 Edition
Rev 2B: 11-9-12
3.
Connect cold air return of primary furnace to DAKA filter box using a minimum 10”
diameter pipe.
NOTE: After attaching warm and cold air supply and return pipes to
primary furnace, check entire system to insure that static pressure remains
unaffected. Verify horizontal duct clearances (see FIG. 3).
B.
For Use As A Central Furnace
– See FIG. 2
1. Install a minimum 16" x 16" plenum (PLENUM MUST BE METAL) on air jacket
top with tin snips or sabre saw as needed, using starting collar to attach.
2. Install ductwork with proper clearances to combustibles in accordance with local
building codes.
3. Make sure to connect a cold air return line to the back of the cold air filter box that
was supplied with your new 622. Install and assemble the cold air filter box
according to instructions.
VI. CONNECTING DAKA FURNACE TO CHIMNEY
Mount and secure 6" non-galvanized smoke pipe, 24-ga. or heavier, to rear
smoke outlet on DAKA furnace. Continue same gauge single-wall pipe to
chimney connection, with following safety rules in mind:
1. A barometric regulator should be installed in smoke pipe at least 18" from
furnace, to permit adjustment of chimney draft to a maximum of .06" water
column draft. Barometric Regulator No. 283 with adjustable draft setting is
available through DAKA for this purpose.
2.
Smoke pipe should maintain a minimum 18" clearance to all combustibles
and should never pass through walls or ceilings. Use proper thimbles for
those passages.
3. Heat reclaimers, fins or the like should not be used on smoke pipe, as they tend
to cool flue gases and add to creosote formation on stoves and furnaces of
advanced airtight design.
4. All joints of chimney connector pipe should be secured with a minimum of three No.
7 sheet metal screws & further sealed with furnace cement to maintain good draft.
5. Smoke pipe should normally be installed with male ends leading from chimney to
furnace; should runny creosote be formed in chimney connector, it will then return
through pipe to furnace without dripping out of joints.
6. Maintain a minimum of 1/4" per foot of pipe rise to chimney connection; the
steeper the rise, the more easily draft will be maintained, generally.
7.
Avoid the use of 90° elbows in any chimney connector, as they adversely
affect draft. If 90° elbows must be used, do not install more than two in any
chimney connector.
8.
Adequate combustion air must be provided in furnace area to prevent poor firing
and smoking. Keep a window cracked open in furnace area or install dryer-type
4
"
vent to bring in fresh air.
