SCOTTY SS DB-202A, Owner'S Manual

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SCOTTY SS – INSTRUCTION MANUAL
Scotty SS Nov-05 24
SECTION 3 - ADD ON TO OIL FURNACE
3.0 ADD ON TO OIL FURNACE
(Fig S202-1)
Scotty SS DB-202A may be connected downstream of a new or existing oil furnace.
The blower from the existing oil furnace provides the air circulation. The Scotty SS DB-
202A may only be connected downstream from an oil furnace having an input rating (on
original name plate) of between 0.75 and 0.90 USGPH, or at least 1000 cfm.
For details and required duct clearances see Fig. S202-1. The minimum cross-
sectional area of supply ductwork from the wood furnace should be 100 Square inches.
The return air duct area should be equal or larger.
As the controls are not suitable, the Scotty SS DB-202A must NOT be installed for
normal operation as a GRAVITY system.
IMPORTANT – This equipment should be installed in accordance with the
manufacturer’s instructions in a manner acceptable to the regulatory authorities and by
technicians experienced in such work. When required by the regulatory authority, such
technicians should be licensed to perform this service.
The installation shall comply with CSA standard B365, Installation Code for Solid Fuel
Burning Appliances and Equipment.
Changes made to the oil furnace installation shall comply with CSA standard B139,
Installation Code for Oil Burning Equipment.
3.1 COMBUSTION AIR SUPPLY FOR WOOD AND OIL BURNING
APPLIANCES
It is important to provide adequate combustion air to the furnace. It may be necessary
to add a ventilator to an exterior wall of a closed furnace room or an airtight basement.
Air inlets of at least 100 square inches free area (1.5 in
2
/1000Btu) must be provided to
the room occupied by the wood fired or oil fired furnace. These fresh air inlets must
provide or allow free access of fresh outside air to the furnace. At no time or under any
circumstances should a wood or oil-burning appliance be starved of combustion air.
The appliance must at all times be able to maintain the approved stack draft. The
barometric draft regulator must be installed on the furnace smoke pipe in the same
room or at least in such a way that there is unrestricted free passage of air between the
combustion air inlet to the furnace or burner and the barometric draft regulator.
Operating a wood or oil fired appliance with inadequate combustion air could be
hazardous.