HP DB-102 - Manual (Page 12)

SCOTTY WOOD FURNACE – INSTRUCTION MANUAL
Scotty Oct-06 12
We recommend that the KERR SCOTTY Wood Furnace be connected to its own
chimney. However, two or more fuel fired appliances, other than fireplaces or
incinerators, may be connected to the same chimney.
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 storey;
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.
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 (Fig S102-1)
The KERR SCOTTY Wood Furnace is to be installed in accordance with National
Building Code or local regulations. Allowances front and rear must be made for
cleaning and servicing.
NOTE: Regardless of minimum clearances to combustibles for safety reasons, a
minimum clearance of 30 inches (765 mm) should be allowed at the furnace
rear for cleaning (due to length of cleaning rake) and access to smoke pipe.
Minimum safety clearances to combustibles are:
Front
48” 1220 mm
One Side 6” 155 mm
Other Side (for rear access) 24” 610 mm
Rear (see Note above) 24” 610 mm
Flue Pipe to combustible, other furnace & electrical wiring 18” 457 mm
Wood Furnace Above Plenum and 6’(1.8 m) of duct 6” 153 mm
Supply Duct beyond 6’ 2” 50 mm
Return Duct Plenum and 6’(1.8 m) of duct 6” 150 mm