Product Manual

HeatMax II Furnace Installation and Operation Manual
33
7.3 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.
MODEL (DIRECT DRIVE) FLOW
TEMP
VAR.
BTU/ H
STATIC
PRESSURE
OPTIONAL
FILTER
VENT MOT. VIT. (CFM) (°F) (WOOD)
INCH OF
W.C.
(IN)
HEATMAX
II
DCT-916-800-5 1/4 4 1800 115 125,000 0,2 20" x 15" x 1"
Blower speed Static pressure (in. WC) / (Pa) Flow (CFM)
1 0.2 / 50 900
2 0.2 / 50 1000
3 0.2 / 50 1200
4 0.2 / 50 1400
Volts Amps Max Amps Hertz Watts
120 2.8 3.4 60 336
7.4 Draw Calibration
The draw: 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
This leads to premature wear of the furnace, a situation that is not covered by warranty.
o A draw greater than -0.08" W.C. (20 Pa) leads to uncontrollable fire even if the
air control is in closed position.
o To prevent excessive draft, a barometric control must be installed to control
excessive draft. It must be adjusted to the maximum draft of 0.06" W.C. (15 Pa)
measured at the output of the furnace.