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a. Combustible material:
“...materials made of or surfaced with wood, compressed paper, plant fibers, or
other materials that are capable of being ignited and burned. Such materials
shall be considered combustible even though flame proofed, fire-retardant
treated, or plastered.”
b. Non-combustible material:
“...material that is not capable of being ignited and burned; such as material
consisting entirely of, or a combination of, steel, iron, brick, concrete, slate,
asbestos, glass, and plaster.”
: Carefully read and thoroughly understand the following guidelines and warnings
before continuing with the installation of this appliance. Failure to follow these guidelines can
cause improper and unsafe operation of this appliance. Unsafe operation can result in substantial
property damage, severe personal injury, or death.
1. This appliance shall be used with only the type of fuel oil for which it is approved. Refer to the
appliance-rating label for the required type of fuel.
2. This appliance is an oil-fired furnace designed for installation on non-combustible materials.
3. Ensure that adequate combustion and ventilation air is available to the unit.
4. The airflow resistance of the duct system attached to this appliance must fall within the allowable
external static pressure range for this unit. Refer to the Airflow Requirements and Sizing of
Ductwork section of this manual.
5. Make sure supply and return air ducts are completely sealed to the appliance casing. Refer to the
Airflow Requirements and Sizing of Ductwork section of this manual.
Table 1: MINIMUM CLEARANCES TO COMBUSTIBLE MATERIALS
TYPE OF
UNIT
MODEL NO.
FROM
SIDES OF
FURNACE
FRONT
TOP &
SIDES OF
PLENUM
FROM THE
FLUE/VENT
REAR
Highboy
OHCFA072DV4R 0” Note
1
1” 0” 0”
Note:
1
OHC front clearance 6” for Closet, 24” for Alcove.
The minimum clearances listed in the preceding table are for fire protection. Clearance for servicing the
front of the furnace should be at least 24 inches.
NOTE: The OHC furnace is approved for closet installation.