Schwank IT(U) - Manual (Page 20)

GP-MSEM-BX-06A
SEM(U) / IT(U) Manual
RD: Aug 2006
RL: 06A
KH
Order Optional Parts:
Air Intake Flange:.... Heater Model Reqd.
Air Intake Vent Cap:............JS-0532-VC
12. COMBUSTION AIR DUCT
Where heater is operated in a negative air
condition or in contaminated air atmosphere
such as woodworking shops, air for combus-
tion must be ducted from outside to intake
flange on blower. The total maximum com-
bined length of vent and combustion air duct
is 80' for SEM(U) / IT(U) 200, 175, 155 and 130, and 50' for SEM(U) / IT(U) 110, 100,
80, 60 and 45. Neither the individual flue
vent or combustion air duct is to exceed 50'.
The total maximum allowable combined
vent /air duct is reduced by ten feet for every
90
o
vent elbow installed.
Where the vent pipe passes through areas
where the ambient temperature is likely to
produce condensation of the flue gases, the
vent pipe shall be insulated with a suitable
material as approved and specified by the in-
sulation manufacturer. Check with the manufacturers Technical Sup-
port as to the maximum vent temperature re-
quirements.
The vent system must always be adequately
supported to prevent sagging.
FIGURE 14 FLUE VENT CONNECTION
For Direct and Indirect Venting it is recommended to install a length of ’C’ Vent onto the
end of the last tube before any fittings are installed. The “C” Vent connection should be
slipped onto the tube and positioned approx 6” beyond the swaged portion of the 4” tube
and must be secured with sheet metal screws.
FLUE VENT END
OF TUBE
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