SCOTTY SS DB-202A, Руководство пользователя

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SCOTTY SS – INSTRUCTION MANUAL
Scotty SS Nov-05 17
2.7 DUCT CONNECTION
(Fig S202-1, Fig S202-2)
See figure
S202-11 for Approved Furnace Ductwork Configurations.
See figure S202-12 for Prohibited Furnace Ductwork Configurations.
Minimum cross-sectional area of ductwork from furnace should be approximately 160
square inches with equal or larger size for return air.
The furnace must not be installed as a gravity system as the controls are not designed
for this type of operation.
The dimensions and locations of permissible openings in casings for ducts, blower, or
emergency air are clearly identified on the furnace or on specific templates enclosed in
the firebox.
Make or enlarge the openings in the wood furnace casing exactly as identified for add-
on connection and on the appropriate side, trim the furnace insulation flush with cut
opening. Fasten edges of insulation securely with metal straps or bend tabs of duct
starting collar over insulation edge to hold it in place.
DO NOT use duct elbows having an inside radius of less than 6 in (152 mm). Use only
16 x 20 in. duct “S” type interconnection for this furnace. Make all duct connections for
the “S” type interconnection (See Fig. S202-2).
CAUTION:
a) The DB-202A is certified for installations using a divider in the plenum of the oil
furnace.
b) An ADD-ON unit must only be connected to a furnace, duct system and chimney,
which are in good operating condition.
c) DO NOT relocate any of the safety controls in the original furnace installation.
d) Operate the oil-fired unit periodically to ensure that it will operate satisfactorily when
needed.
e) DO NOT connect to duct work so that a reverse flow is possible.
f) Before attempting installation, determine if there is suitable space available in the
furnace area for the furnace connection outlined herein.
g) The external static pressure in the warm air duct to the house of the original system
must be measured prior to any changes to the system. These are to be reset to the
same values after the add-on procedure to maintain airflow through the oil furnace.
An important requirement of this type of installation is that when installed in an existing
system the main ducts may have to be lowered to assure proper and safe clearances
from combustible material. (See Fig. S202-1 and S202-2).