Drolet HEATPRO DF03000, Инструкция по установке и эксплуатации

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HeatPro Furnace Installation and Operation Manual
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8.3.5.4 Maximum burn cycle times
The burn cycle time is the period between loading wood on a coal bed and the
consumption of that wood back to a coal bed of the same size. The flaming phase of the
fire lasts for roughly the first half of the burn cycle and the second half is the coal-bed
phase during which there is little or no flame. The length of burn you can expect from your
furnace, including both the flaming and coal bed phases, will be affected by a number of
things, such as:
•
firebox size,
• the amount of wood loaded,
•
the species of wood you burn,
•
the wood moisture content,
• the size of the space to be heated,
• the climate zone you live in, and
•
the time of year.
• the time cycle for the thermostat to call for heat.
The table below provides a very general indication of the maximum burn cycle times you
are likely to experience, based on firebox volume.
FIREBOX VOLUME
MAXIMUM
BURN TIME
<1.5 cubic feet 3 to 5 hours
1.5 c.f. to 2.0 c.f. 5 to 6 hours
2.0 c.f. to 2.5 c.f. 6 to 8 hours
2.5 c.f. to 3.0 c.f. 8 to 9 hours
>3.0 c.f. 9 to 10 hours
8.3.6 Control of the air inlet damper
Always turn the furnace on with the air inlet damper open. Once the temperature of the
wood, the combustion chamber and the chimney is stable, close the air inlet damper to
obtain a more efficient combustion.
To control the air inlet damper, use the switch on the side of the control box located at the
back of the furnace.
Reducing the combustion air will do two things. First, the combustion rate will decrease,
which will spread the thermal energy of the fuel over a longer period of time. In addition,
the velocity of the exhaust gas decreases, which allows better heat transfer in the heat
exchanger and chimney.
The closure of the main air intake reduces the intensity of the flames which indicates the
achievement of optimum performance. If the flames diminish in intensity at a point where it
almost disappears, it is an indication that the air inlet damper was closed too soon or the
firewood used is dry enough. If the wood is dry enough and the air control is closed when
the unit is at a stable temperature, the flames will decrease but remain strong and stable to
provide efficient heating.