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DAKA Furnace Model 621
November 2009 Edition
Revision 2: 7-20-12
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.
VII. OPERATING CONTROLS
IMPORTANT: In a supplementary "Add-On" installation, the blower on the
DAKA furnace can be used as a circulation blower for heating the house.
The blower can be used in conjunction with your primary furnace blower to
boost air circulation in large ductwork systems. An optional fan control may
need to be located in supply plenum to turn primary blower on and off when
heat is received from the DAKA furnace. See FIG. 1 for fan control location.
IMPORTANT: Normal operation will produce flue gas temperatures in the
300°- 600°F range. If higher or lower operating temperatures are normally
obtained, increase or decrease the barometric draft control setting and room
thermostat setting to bring temperatures to within range. Too cool a flue gas
temperature can result in heavy creosote formation, while too hot a
temperature increases danger of chimney fire.
A. Smoke Bypass Damper
Due to the extra long smoke baffle in this model, designed to create the longest
possible flame path for maximum heat extraction, a sliding smoke bypass damper
plate, controlled by the damper rod over the fire door has been provided. Before
opening fire door for reloading or checking fire, pull the damper rod out fully to allow
the smoke to exit at rear of chamber, rather than rolling forward and possibly spilling
into the room. After closing fire door, push damper rod fully in to seal rear vent.
VIII. EMERGENCY OPERATION INSTRUCTIONS
A. Operation During Power Failure
1. Remove furnace filter(s) to prevent fire hazard.
2.
Set automatic draft control to no higher than “EPF” (Electrical Power Failure).
3. Continue firing the fire with smaller loads, more frequently tended.
4. Use extreme care and vigilance during power failure to keep furnace from
