J Notes: Thermal resistance values for typical chimneysare as follows:
R2 (2 ft2 ohro°F / Btu):
R3 (3 ft2 ohro°F / Btu):
R6 (6 ft2 ohro°F / Btu):
clay-lined masonry, A-vent
metal liner in clay-lined
Masonry
metal or clay-lined masonry
with R4.5 (4.5 ft2 ohro°F/ Btu)
insulation between liner and
masonry (e.g. 2 in. of
expanded mica or 1 3/8 in. of
high density glass fibreboard.)
Applying the Table:
If a furnace with 0.60 USGPH nozzle is to be connected
to a 20 ft. tall clay-lined masonry chimney, the thermal
resistance of this chimney type is R2, which is less than
R6. The actual firing rate at 156 psig is 1.25 x .60 = .75.
Therefore this table shall apply as:
The minimum size permitted shall be 4 in. inside
diameter.
The maximum size permitted shall be 5 in. inside
diameter.
The minimum base temperature shall be about 320°F.
TABLE # 2
Total input rating of all Flue inside diameter Minimum base temperature (°F)
connected appliances (in) for chimney height (if) of :
kW kBtu/h USGPH Min. ' Max. 11 20 28 36
21 70 0.50 3 5 300 400 535 725
27 91 0.65 3 5 275 340 430 535
31 105 0.75 4 5 260 320 380 475
36 119 0.85 4 5 250 300 355 430
41 140 1.00 4 6 225 300 365 430
51 175 1.25 4 6 240 275 320 365
4.3) Side-wall venting, DV-2000 TM Direct
Vent System:
The furnace can be side-wall vented without the use of
a side-wall power ventor using the new DV-2000 TM
venting system with the high static pressure Beckett
AFtt and Riello 40-BF oil burners. Outdoor
combustion air must be directly connected to the
burner of the DV-2000 TM venting system will not
function.
The notable characteristics of the DV-2000 TM system
are as follows:
Certified to use the following materials for ducting the
intake air from the terminal to the burner; Schedule 40
PVC DWV, Schedule 40 ABS DWV, And ASTM 2729
Sewer Pipe.
One hole of minimal size (6") is required to be cut in the
side-wall, and the terminal is designed to fit through a
minimum 2 X 8-joist space.
The standard terminal is designed for a wall thickness
up to 14", and the deep wall terminal for wall thickness
up to 25".
Incorporates a vent blockage safety shutdown system.
If the vent or intake opening ever becomes partially or
fully blocked, the burner will shut down before a #_!
smoke occurs.
The intake and vent circuits within the terminal can be
accessed for cleaning.
There are 3 main components to the DV-2000 TM
system; the VTK vent terminal kit, the IFV insulated
flexible venting material and the field-supplied 3" PVC
or ABS intake piping.
Vent terminal kits - DV-2000TM:
The certified standard vent terminal kit is Model No.
VTK-1 or VTK-2, and is suitable for installation in walls
up to 14" thick. An alternate kit, Model VTK-1-DW or
VTK-2-DW is available to accommodate walls up to 25"
thick. Both kits contain the following items to complete
the hook-up to the venting and furnace:
1 Terminal
2 Sealing Clamps
1 Side-wall Venting Breech Plate
2 Sealing Strips
1 Inner Wall Plate
1 Pressure Control with Tubing
2 Insulated Quick-connect Terminals
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