Steffes 7140 - Manual (Page 16)

Step 3 Lower the insulation blankets back into position,
one at a time. Carefully tuck the sides of the
insulation into the edges, corners, and around the
exposed portions of the heating elements to
ensure maximum efficiency.
Step 4 Reinstall the galvanized front panel and secure it
to the system using the screws that were origi-
nally removed. Slide the bottom of this panel
inside the lower lip of the brick cavity. The top
rests on the outside of the cavity.
Step 5 Remove the electrical panel cover and locate the
element screw kit.
Step 6 Carefully route wiring harnesses and connect
them to the heating elements, using screws
provided in the hardware package. Make con-
nections with screw heads up and threads
pointing down. Element screws should be tightened to 20 inch lbs. Refer to Element Installation (Figure
5) for proper positioning.
Step 7 The brick core temperature sensor must be installed prior to putting the painted front panel in place.
Installation
Installation
n
3.05 Comfort Plus Commercial Hydronic
BRICK CORE TEMPERATURE SENSOR INSTALLATION
Step 1 Remove the screws by the brick core temperature sensor holes in the
galvanized front panel.
Model 7120 has one brick core temperature sensor
and Models 7130 and 7140 each have an upper and a
lower brick core temperature sensor.
Step 2 Insert the brick core temperature sensors through the holes in the
galvanized front panel. Be sure the sensor(s) are connected to the
relay driver board (Figure 7) as shown below. The sensor 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 them side-to-side while gently pushing inward.
Step 3 Once the brick core sensor(s) are installed, put the screws back
into position in the galvanized front panel to hold the sensors 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.
Risk of improper operation.
Proper installation of the
brick core temperature
sensor is critical to the
operation of the heating
system. Read and follow
installation instructions
carefully.
CAUTION
AIR CHANNEL PLACEMENT
FIGURE 6
Electrical
Panel
Front Air
Channel
BRICK
CORE
SIDE VIEW
Outlet
Inlet
7120 7130
} Lower Core
7140
} Lower Core
} Middle Core
} Upper Core
} Lower Core
} Upper Core
FIGURE 7