Sears 9MPD - Manual (Page 34)

Control Center Fuse
The 24V circuit contains a 5-amp, automotive-type fuse located
on fan timer board. (See
Figure 32) Any electrical shorts of 24V
wiring during installation, service, or maintenance may cause
fuse to blow. If fuse replacement is required, use only a fuse of
identical size (5 amp.)
7. Ductwork and Filter
A 1A#ARI\III\IB
CARBON MONOXIDE POISONING HAZARD
Failure to properly seal duct can result in death, personal
injury and/or property damage.
Do NOT draw return air from inside a closet or utility
room. Return air duct MUST be sealed to furnace casing.
Installation
NOTE: Design and install air distribution system to comply with
Air Conditioning Contractors of America manuals and/or NFPA
pamphlets 90A and 90B or other approved methods that conform
to local codes and good trade practices.
1. When furnace supply ducts carry air outside furnace area,
seal return air duct to furnace casing and terminate duct
outside furnace space .
2. Install air conditioning cooling coil (evaporator) on outlet
side of furnace.
3. For furnaces installed without a cooling coil it is recom­
mended that the outlet duct be provided with a removable
access panel. This panel should be accessible when the
furnace is installed so the exterior of the heat exchanger
can be viewed for inspections. The access panel
MUST be
sealed to prevent leaks.
4. If separate evaporator and blower units are used, install
good sealing dampers for air flow control. Chilled air going
through thefurnacecould causecondensation and shorten
the furnace life.
NOTE: Dampers (field supplied) can be either automatic or
manual. Manually operated clampers MUST be equipped with a
means to prevent furnace or air conditioning operation unless
damper is in the full heat or cool position.
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