Operating instructions

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For boilers for connection to gas vents or chimneys, vent
installations shall be in accordance with the National Fuel
Gas Code, ANSI Z223.1-latest revision and applicable
provisions of the local building codes.
Check Your Chimney
Thisis avery important part ofyour heating system.It must be
clean,the right size,properly constructed and in GOOD CONDI-
TION. No boiler can function properly with abad chimney.
1. Uselocal codes forinstallation or National Fuel GasCode
Z223.l-latest revision. In Canada, followCSAB149.1or .2
Installation Codes. It is very important to properly sizethe
venting systemfor induced draft appliances.Consult the Vent
SizingTables,in the National FuelGas Code ANSIZ223.l-
latest revision for correct sizinginformation. In Canada, consult
the Vent SizingTables,Amendment #1 to CSA-B149.1and .2
Installation Codes.
2. The boiler's induced draft blower has a 3" outlet. A 3" X 4"
increaser fitting is included in the parts bag. Locate the in-
creaser fitting on the outlet of the induced draft blower, and
secure gastight with a bead of the furnished silicone sealant. The
increaser fitting is required on this boiler for Category I venting,
and 4" is the minimum permissible vent diameter. This does
not imply that the vent connector is intended to be 4" diam-
eter pipe. The vent connector shall be sized according to the
appropriate venting tables in the National Fuel Gas Code or the
Canadian Installation Codes, and may be required to be larger
than 4" diameter.
The boiler installation for chimney venting is not complete
unless the Y'x 4" increaser fitting is located and secured.
3.
.
Theseare high efficiencyboilers with a low stackor exhaust
temperature.
Ifventing into a masonry chimney without a liner, line the
chimney from top to bottom with either:
A. ListedType Bvent pipe
B. Listedflexiblevent liner
C. Poured ceramicliner.
5. Outside chimneys should not be used unlessthey are (choose
one of the following):
A. Enclosedin a chase
B. Lined with TypeB vent pipe
C. Usea listedflexiblevent liner
D. Use a certified chimney lining system
6. The vent connector from the boiler to the chimney should run
as directly as possiblewith as fewelbowsas possible.
7. Where possible,it is recommended to common vent the water
heater and boiler. Consult the appropriate Vent SizingTables in
either the National FuelGas Code, or the Canadian Installation
Codesfor specificrequirements of multiple appliance venting.
8. If the boiler is the only appliance connected to the vent, TypeB
vent pipe is recommended for the vent connector.
9. Slopepipe up from boiler to chimney not lessthan 1/4"per
foot.
10. End of vent pipe must be flushwith the inside faceof the chim-
ney flue.Use a sealed-in thimble for the chimney connection.
11. Thesections of vent pipe should be fastenedwith sheet metal
screwsto make the piping rigid. Use stovepipewires to support
the pipe from above.
12. Do not connect to fireplaceflue.
13. Do not install a damper on this boiler.
Minimum Vent Pipe Clearance
If the vent pipe must go through a crawl space, Type Bvent pipe
should be used. Where vent pipe passes through a combustible wall
or partition, use a ventilated metal thimble. The thimble should be 4
inches larger in diameter than the vent pipe.
If boiler is installed with single wall vent, it must have a 6" clear-
ance between its surface and any combustible material. A new Type
B gas vent or flexible liner must be installed in accordance with the
instructions furnished with the vent. Maintain clearances as speci-
fied for the vent pipe.
Check the vent pipe to see if it is fire-stopped where it goes through
the floor or ceiling. It should have an approved vent cap with clear-
ances from the roof as shown in Figure 9. If clearances are less
than shown in Figure 9, have the vent checked by local authorities.
For boilers for connection to gas vents or chimneys, vent installa-
tions shall be in accordance with the National Fuel Gas Code, ANSI
Z223. l-latest revision and applicable provisions of the local building
codes. In Canada, follow CSA B149.1 or .2 Installation Codes.
Vent connectors serving appliances vented by natural draft shall not
be connected into any portion of mechanical draft systems operating
under positive pressure.
Removing Existing Boiler From Common Venting System
When an existing boiler is removed from a common venting system,
the common venting system is likely to be too large for proper vent-
ing of the appliances remaining connected to it.
At the time of removal of an existing boiler, the following steps shall
be followed with each appliance remaining connected to the com-
mon venting system placed in operation, while the other appliance
remaining connected to the common venting system are not in
operation.
1. Seal any unused openings in the common venting system.
2. Visually inspect the venting system for proper size and hori-