HeatMax II Furnace Installation and Operation Manual
34
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.
7.4.1 The use of a thermometer
The first use of a thermometer is to inform the user about the discharge temperature of flue
gases. Without accurate measurement of the draft using a pressure gauge (manometer),
the thermometer will indicate if the temperature is ideal, too low or too high.
The use of a thermometer is therefore an acceptable alternative that can tell if the chimney
is hot enough to generate an adequate draft.
- Use a magnetic thermometer for Single wall connector pipe.
- Use a probe thermometer for Double wall connector pipe.
Summary of Contents for DF01001
Page 30: ...HeatMax II Furnace Installation and Operation Manual 30 ...
Page 64: ...HeatMax II Furnace Installation and Operation Manual 64 11 Exploded diagram and parts list ...
Page 65: ...HeatMax II Furnace Installation and Operation Manual 65 ...
Page 66: ...HeatMax II Furnace Installation and Operation Manual 66 ...
Page 67: ...HeatMax II Furnace Installation and Operation Manual 67 ...
Page 68: ...HeatMax II Furnace Installation and Operation Manual 68 ...
Page 74: ...HeatMax II Furnace Installation and Operation Manual 74 12 2 1 Technical data HeatMax II ...
Page 75: ...HeatMax II Furnace Installation and Operation Manual 75 ...