SCF-050 Manual
17
Blower Specs
The
Blower is a 2-Speed blower. (600 – 800 CFM) When
connecting this unit to a duct system, the high speed
should be used. If the Furnace is to be used as a stand-
alone shop heater, the option is available to select the 600
CFM setting or the 800 CFM setting. The slower speed
will produce higher air temperatures because the air
moves slower through the heat exchange system,
allowing it to become hotter.
Minimum Duct Size
Round: 10”
Rectangular: 6” x 15”
Intake Air Duct should be 10% larger
Maximum Static Pressure: .4”
Velocity: 1400 FPM at the above mentioned duct sizes.
A larger duct size will produce less Air Flow noise; the above-mentioned sizes are the minimum
allowed.
Fan Limit Control
The Furnace uses a Fan Limit Control built into the furnace centered below the 10” plenum opening.
The High Limit function of this control is set at a maximum setting of 200 degrees F.
CAUTION:
DO NOT TAMPER WITH THE HIGH
LIMIT SETTING.
There are two adjustable Fan Control Settings. They control
when the Convection Blower turns on, and when the Blower
turns off. This will help control the temperature of the air
coming out of the registers. These settings may be adjusted
to accommodate customer preference. If the air seems too
cool, simply adjust the Fan Off setting higher to shut the
blower down sooner. Factory settings are shown in figure 9.
The Fan limit has a Break-Away Tab that has been removed.
When replacing a Fan Limit Control, be sure to remove the
tab as shown in figure 9.
