Calcana SR Series, Specifications, Installation, Operation Service And Spare Parts Manual

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SR -SERIES
63
16.0
UNVENTED APPLICATIONS
Units may ONLY be installed in unvented installations such as brooder barns or industrial buildings if the
following conditions are met:
1) A 4" (10.2 cm) diameter by 90° elbow must be attached to the flue, vent or exhaust end of heater and
turned down pointing towards the floor. (see Figure 55)
2) The heater must be interlocked with an exhaust fan sized at 4 (four) CFM (114 Liters) for every 1000
Btu/hr input.
3) For BROODER NSTALLATION ONLY, the fan interlock is not required only if the maximum input does
not exceed 30 Btu/hr per cubic foot (28.32 Liters) of volume of air in the building or the input specified
by local codes or authorities.
4) Maintain clearance to combustibles at exhaust (vent) end as noted below.
UNVENTED INSTALLATIONS
Figure 55. UNVENTED INSTALLATIONS