Steffes 4140 Owner & Installers Manual - Manual (Page 15)

Comfort Plus Installation 3.07
4100 SERIES
The 4100 series is factory configured for a left-to-right or right-
to-left airflow. In either airflow direction, the holes directly
above the air outlet on the right side of the 4100 Series MUST
be contained in the duct system. (See Figure 8 for reference
to these air holes.)
If a down flow configuration is desired with the 4100 series, a
down flow kit must be ordered from the factory (Order Item
#1301578) and the system MUST be raised a minimum of 10"
off the ground. An 18" pedestal is available (Order Item
#1301585) to elevate the Comfort Plus.
Step 1 Unbox the supply air blower plenum assembly.
Step 2 Remove and discard metal plate securing supply air
blower to plenum assembly.
Step 3 Locate the plenum support bracket shipped in the
plenum box. Attach the bracket to the supply air side
using the blunt tip screws supplied in the plenum
assembly hardware package. Refer to Figure 8 for
proper positioning of the plenum support bracket.
Step 4 Attach the supply blower wiring harness located in
the base of the system to the blower using the connections located
on the ends of the harness. Be sure to place any excess wiring in
the base of the system below the radiant heat shield (Figure 8).
Step 5 Verify that the blower is installed in the plenum with the motor
facing away from the system (Figure 9).
Step 6 Attach the supply air blower plenum to the Comfort Plus by drilling
two 1/8” holes per edge and using the self tapping screws supplied
in the hardware package.
Step 7 Connect both the return air and supply air ducting systems in the
structure to the Comfort Plus system. Be sure the air holes just
above the air outlet on the right side are contained in the duct
system. (See Figure 8 for reference to the location of these holes.)
If the Comfort Plus system is installed in a small enclosed area (less than 400 square
feet), a minimum of a 24"x 24" opening must be installed into the area where the sys-
tem is located. In addition, a 6" x 6" non-closing type register can be cut into the
return air duct. Refer to the Placement and Clearance Requirements section (Pages
3.02-3.03) for more information.
Step 8 Connect the supply air duct in the
structure directly to the system's air
outlet located on the top panel.
Step 9 Adjust the CFM setting at the vari-
able speed low voltage circuit board
as shown in Figure 10.
Step 10 The W/E jumper (Figure 10) MUST
be in the ON position or the blower
will not operate with an E call from
the thermostat.
4100 SERIES
SUPPLY AIR PLENUM ATTACHMENT
FIGURE 8
When routing the harness to the supply
air blower, the harness must route to the
side of the air deflector in the bottom of
the supply air blower housing.
CAUTION
Air
Holes
Plenum Support Bracket
Radiant Heat Shield
FIGURE 10
External static pressure should not exceed .75 inches water column.
NOTE: With 2 stage Heat Pump, a Stage 1 heat call results in 70% of
selected CFM.
Jumper
½ HP Variable
Speed CFM
1 HP Variable
Speed CFM
A 1000 1200
B 1200 1400
C 1400 1600
D 1600 2000
FIGURE 9