SERIES 8800 & 8900 INSTALLATION AND OPERATING INSTRUCTIONSPage 8
CHIMNEY & VENT PIPE
CONNECTIONS
WARNING: The vent installation must be in
accordance with Part 7, Venting of Equipment, of
the National Fuel Gas Code, ANSI Z223.1/NFPA
54-latest revision or applicable provisions of the
local building codes. Canadian installations must
comply with CAN/CGA B149.1 or .2 Installation
Code. Improper venting can result in excessive
levels of carbon monoxide which can result in
severe personal injury or death!
Chimney Inspection & Sizing
A thorough inspection of the masonry chimney must be
performed to ensure that the chimney is clean, properly
constructed, lined and sized. Exterior masonry chimneys
should not be used unless properly lined to prevent
condensation and draft problems. Table 3A and 3B lists
the equivalent breeching and flue sizes required for the
boiler/water heater.
Table 3A - Equivalent Breeching & Chimney Size
Model Size Model Size
Size in
mm
Size in
mm
420 10
254
1580 18
457
530 10
254
1685 18
457
630 12
305
1790 20
508
735 14
356
1900 20
508
840 14
356
2000 22
559
950 14
356
2400 24
610
1050 16
406
2800 26
660
1160 16
406
3200 28
711
1260 16
406
3600 30
762
1370 18
457
4000 30
762
1470 18
457
Note: These sizes are based on a 20 ft,
6.1m
chimney height.
Table 3B - Equivalent Breeching & Chimney Size Dual Flue
Model Size Model Size
Size in
mm
Size in
mm
840 10
254
1790 16
406
950 10
254
1900 16
406
1050 12
305
2000 14
356
1160 12
305
2400 16
406
1260 12
305
2800 18
457
1370 14
355
3200 20
508
1470 14
355
3600 22
559
1580 14
355
4000 22
559
1685 14
355
Note: Minimum vertical rise off top dual flue units: 3 ft,
1 m
(sizes
840-3200), 5 ft,
1.5 m
(sizes 3600-4000).
When more than one appliance is connected to the
same chimney flue, the flue must be large enough to
safely vent the combined output of all the appliances.
WARNING: If an appliance using any type of a
mechanical draft system operating under
positive pressure is connected to a chimney
flue, never connect any other appliances to this
flue. Doing so can result in the accumulation of
carbon monoxide which can cause severe
personal injury or death!
Vent Connections
Always use a type B or single wall galvanized metal vent
pipe the same diameter as the draft diverter flue collar.
Use the shortest, straightest vent system possible for
the installation. If horizontal runs exceed 6 ft,
1.8 m
they
must be supported at 6 ft,
1.8 m
intervals with overhead
hangers. The vent system should be sloped up toward
the chimney at a minimum rate of 1/4 in/ft,
20 mm/m
and terminate flush with the inside of the chimney flue.
Fasten each connection with at least 3 corrosion
resistant sheet metal screws.
WARNING: Never modify or alter any part of the
boiler’s draft diverter. This includes the removal
or alteration of any baffles. Never install a vent
pipe of a diameter different than that of the
boiler draft hood flue collar. Failure to comply
with this warning can result in severe personal
injury or death.
Always provide a minimum clearance of 6 in,
152 mm
between type C vent pipe and any combustible
materials. Type B1 vent may be used, clearance
between it and any combustible material must be as
listed.
WARNING: Failure to maintain minimum
clearances between vent connectors and any
combustible material can result in a fire causing
extensive property damage, severe personal
injury or death!
To determine the appropriate power venter for the boiler/
water heater, see Table 4, Power Venter Sizes. Follow
the power venter manufacturer’s installation instructions.
Table 4 - Power Venter Sizes
8900 Power Venter Max. Pipe Length
Model Size FT
m
420-530 HS-2 100
31
630 HS-3 100
31
735-1160 HS-4 100
31
1260-1900 HS-5 100
31
Models 2000-4000 - Consult Tjernlund
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