Olsen BML-80B2 - 5 Locating the Unit; 6 Furnace Used in Conjunction with Air Conditioning

5
P/N 30149, Rev. G [12/15/2016]
5. Locating the Unit - [See Table 1]
• Locate furnace so ue connection to chimney is short,
direct and consists of as few elbows as possible.
• Centralize furnace location with respect to supply and
return air ductwork. Central location minimizes trunk
duct sizing.
• All models may be installed on combustible oors.
6. Furnace Used In Conjunction With Air
Conditioning
• Install furnace in parallel with or upstream from
evaporator coil to avoid condensation in heat
exchanger.
• When installed in parallel, prevent chilled air from
entering furnace by use of dampers or air controlling.
• Manually operated dampers must have a control to
prevent operation of either system unless dampers
are in full heat or full cool position.
• Air heated by the furnace shall not pass through
evaporator coil unless coil is specically approved for
such service.
• Check and adjust blower speed to compensate for
pressure drop caused by evaporator coil.
• Maintain required clearance between bottom of coil
drain pan and top of heat exchanger as specied by
coil manufacturer.
Table 1: Minimum Installation Clearances
Location
Clearance to Combustibles
BML and BMLV
Lowboy
Top 1" (26 mm)
Bottom 0"
S/A Plenum 1" (26 mm)
Rear 6"** (152 mm)
Sides 1"* (26 mm)
Front 1"** (26 mm)
Flue Pipe
4" (102 mm) measured horizontally
or below ue pipe
8" (204 mm) measured vertically or
above ue pipe
Enclosure Closet
*18 in. (458 mm) Required from 1 side for access to rear
** 24 in. (610 mm) Service Clearance