Steffes 4140 Owner & Installers Manual - Manual (Page 14)

Installation 3.06 Comfort Plus
BRICK CORE TEMPERATURE SENSOR INSTALLATION -
4100 SERIES ONLY
Step 1 Remove the screw(s) by the brick core temperature sensor hole(s) in
the galvanized front panel.
Models 4130 and 4140 have an upper and a lower brick
core temperature sensor.
Step 2 Insert the brick core temperature sensor(s) through the hole(s) in the
galvanized front panel. If installing a system with two sensors, be sure
the one marked "upper" is installed in the upper opening and the one
marked "lower" is installed in the lower opening. The sensor(s) must
pass through the blanket insulation and into the brick core. Holes have
not been predrilled through the insulation. Use the sensor(s) to aid in making a passageway by rotating
the sensor(s) side-to-side while gently pushing inward.
Step 3 Once the brick core sensor(s) is installed, put the screw(s) back into position in the galvanized front panel
to hold the sensor(s) in position and to provide the electrical ground.
Step 4 Check the non-insulated element terminations to make sure they do not come within 1/2" of any surface
area on the system.
Step 5 Re-install painted front panel, using previously removed screws.
DUCTING & AIR FLOW
For air delivery, the Comfort Plus is equipped with a
variable speed supply air blower. When interfacing
with a heat pump, the A-Coil MUST be placed on the
return air side.
To maintain a room temperature of 85 o F or less in the
mechanical room, a 24" x 24" opening can be installed
in the area or a 6" x 6" non-closing register can be cut
into the return air duct. Refer to Placement and
Clearance Requirements (Page 3.02-3.03) for more
information.
3100 SERIES
The 3100 series is factory configured for a right-to-
left air flow.
Step 1 Assemble the factory supplied return air plenum
per the assembly instructions.
Step 2 Once assembled, set the plenum on the right side
of the system with the air filter and indoor coil
access covers facing forward. Line up the pre-
drilled holes on the system with the holes in the
flanges of the plenum and attach using the screws
provided in the plenum's hardware package.
Step 3 Insert the air filter into the filter rack.
Step 4 Connect return air duct to top of return air plenum.
Step 5 Connect the supply air duct in the structure directly to the system's air outlet located on the top of the
system.
Step 6 Adjust the CFM setting at the variable speed low voltage circuit board as shown in Figure 7.
Step 7 The W/E jumper (Figure 7) MUST be in the ON position or the blower will not operate with an "E" call
from the thermostat.
Risk of improper operation.
Proper installation of the
brick core temperature
sensor(s) is critical to the
operation of the Comfort
Plus heating system. Read
and follow installation
instructions carefully.
CAUTION
HAZARDOUS VOLTAGE:
Risk of electric shock. Can cause injury or death.
Do install ducting before energizing the system.
Do NOT operate the Comfort Plus without ducting
installed to both the air inlet and outlet.
Proper duct design and air flow are critical to
achieve optimum system performance. A poorly
designed duct system and/or improper air flow can
cause system inefficiencies, air noise, and conden-
sate drain problems. In applications where poor air
flow conditions exist along with high humidity, it
may be necessary to install a secondary conden-
sate drain pan. (Order Item #1301576).
WARNING
FIGURE 7
Jumper
½ HP Variable
Speed CFM
A 1000
B 1200
C 1400
D 1600
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.