SERIES 8800 & 8900 INSTALLATION AND OPERATING INSTRUCTIONS
Page 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 3 and 4 lists
the equivalent breeching and flue sizes required for the
boiler/water heater. Uninsulated single-wall vent pipe
shall not be used outdoors for regions where the design
temperature is below
32°F
,
0°C
.
Table 3 - 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 4 - 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 5, Power Venter Sizes. Follow
the power venter manufacturer’s installation instructions.
Table 5 - 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
