7.5 Blower technical Data The blower speed must conform to the recommendations of the Warm Air Heating and Air Conditioning National Association and should respect the static pressure ranges in the warm air plenum of the furnace .
TEMP VAR*.
STATIC PRESSURE
OPTIONAL FILTER
MODEL
(DIRECT DRIVE)
FLOW*
BTU/ H
INCH OF W.C. / Pa
VENT
MOT.
VIT.
(CFM)
(°F)
(WOOD)
(IN)
FC2500
DD-10
1/3
1
875
55
55 000
0,2 / 50
20" x 15" x 1"
Volts
Max Amps
Hertz
120 60 * These values may vary depending on installation, fuel, static pressure and use. 7.6 Draft Calibration The draft: The measurement is taken in the exhaust pipe 18" (457 mm) above the furnace's flue collar with a tube and a pressure gauge (manometer). - Poor : -0.03" W.C. (7.5 Pa) and under : ignition problems, risk of smoke spillage, low performance of heat exchangers. - Ideal : from -0.04" to -0.06" W.C. (10 to 15 Pa) : to obtain the optimum performance of the furnace. o A barometric draft control is not required. - Excessive : -0.08" W.C. (20 Pa) : WARNING 5 This leads to premature wear of the furnace, a situation that is not covered by warranty. o A draft greater than -0.08" W.C. (20 Pa) leads to uncontrollable fire even if the air control is in closed position. o The self-regulating furnace control system reduces the risk of excessive draft. If necessary, a barometric control must be installed to control excessive draft. It must be adjusted to limit the maximum draft to -0.06 in W.C. (15 Pa).
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