TW2000 WOOD–FIRED BOILER – INSTRUCTION MANUAL
TW2000 11 Jan-08
The National Standard of Canada, Installation Code for Solid-Fuel-Burning Appliances and
Equipment, CSA-B365-01 clause 5.2.9 states that:
Two or more appliances shall not be connected to the same chimney flue unless:
a) The appliances are located on the same story;
b) A negative pressure is maintained at the flue collar of each appliance;
c) Each appliance is provided with a means to control the rate of flow of air or flue gases
through the appliance combustion and heat exchanger chambers. Where limitations on
flue pressure (draft) are contained in the manufacturer’s instructions, such means shall be
capable of maintaining at the flue collar, the pressure specified by the appliance
manufacture; NOTE: For the purpose of this Clause, draft controls include ash pit air
control dampers, dampers or draft slides wherever located, over fire and flue key pipe
dampers, and check draft controls located on or in the flue pipe.
d) The flue pipes of the appliances are connected to a manifold as close to the chimney as
practicable or directly to the chimney in the following order:
(i) If only solid fuel is used, the flue pipe from the smallest appliance shall be on top
(downstream);
(ii) If different fuels are used as permitted in Clause 5.2.7, the oil flue pipe shall be on top
(downstream); and the solid fuel flue pipe on the bottom (upstream); and
e) The chimney flue is capable of venting the flue gas by natural draft when all appliances
not interlocked to prevent simultaneous firing are firing at their maximum rate at the same
time.
WARNING: If this setting is exceeded it could cause a solid fuel fire to burn out of control.
When installing a wood-burning appliance to an existing chimney carefully inspect entire
chimney for the presence of old inlet holes, which may be improperly covered by metal caps or
other unacceptable means. Fill any openings with brick and mortar to ensure no hazardous
openings exist.
2.5 CLEARANCES
The KERR TW2000 Wood-Fired Boiler is to be installed in accordance with the National
Building Code or local regulations. Allowances front and rear must be made for cleaning and
servicing.
Minimum safety clearances to combustibles are:
Front 48” 1220 mm
One Side 6” 152 mm
Other Side (for rear access) 24” 610 mm
Rear 24” 610 mm
Above Wood-Fired Boiler 24” 610 mm
Flue Pipe to combustible, Boiler & electrical wiring 18” 457 mm
Floor Non-Combustible
These clearances will also allow adequate combustion air to reach the boiler.
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