Crown Boiler CHC68-96 用户手册

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Figure 1: Recommended Support Frame for Horizontal / Counterflow Furnaces 
 
Closet and Alcove Installation 
 
All furnace models may be installed in a closet or alcove on combustible flooring with 
specified (standard) clearances to combustible construction. The horizontal / 
counterflow furnace model requires an optional combustible surface-mounting 
base (model # CSFB-HC68) for vertical installation (i.e., counterflow 
configuration) directly on combustible materials, refer to Figure 2. 
 
 
 
 
Figure 2: Counterflow Furnace Combustible Surface-Mounting Base 
 
Standard Clearances 
 
Standard clearances are mandatory minimum clearances from heated surfaces of the 
furnace to combustible materials to assure protection from fire hazard during furnace 
operation. (Refer to the Standard for the Installation of Oil-Burning Equipment, NFPA 
31-2001, for definitions of combustible and non-combustible materials.)