Steffes 5140 Owner & Installers Manual - Manual (Page 14)

Brick core teMPerature SenSor inStallation
Step 1 Remove the screw(s) around the brick core temperature sensor hole(s) in
the galvanized front panel.
Models 5130 and 5140 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 galva-
nized front panel. If installing a system with two sensors, be sure the one
marked as the upper sensor is installed in the upper position and the one
marked as the lower sensor is installed in the lower position. The sensor(s)
must pass through the blanket insulation and into the brick core. Holes
have not been pre-drilled 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 the painted front panel, using the previously removed screws.
line voltaGe electrical connectionS
In standard configuration, the Comfort Plus
Hydronic is wired for connection to 240V,
however, the element circuits can also be
connected to 208V. A 208V connection
derates the charging input of the system by
25%. If a system rated specifically for 208V
or 277V is required, contact the factory. The
controls circuit in the Comfort Plus Hydronic
system MUST be connected to 120V/240V
or 120V/208V. If connecting to 120/208V,
contact the factory for programming
information.
The 60 amp breakers located in the electrical
compartment on the Comfort Plus Hydronic
feed the core charging (element) circuits. The
15 amp breaker feeds the controls, blowers,
and pumps circuit. All Comfort Plus Hydronic
systems are factory configured to be field
connected to multiple line voltage circuits. If
a single feed line voltage circuit is desired, an
optional single feed kit is available from the factory.
To determine the correct wire size required for each circuit feeding the Comfort Plus Hydronic, refer to the
Specifications (Page A.01) and the system's identification label (Figure 8) located on the lower left side of the
Comfort Plus Hydronic system.
Step 1 Route all line voltage wires through a knockout and into the electrical panel of the Comfort Plus
Hydronic.
Step 2 Make proper field wiring connections to the Comfort Plus Hydronic breakers. Refer to the Line Voltage
Wiring Diagrams (Pages A.05-A.07) for more information on these connections.
CAUTION
Risk of improper opera-
tion. Proper installation of
the brick core temperature
sensor(s) is critical to the
operation of the Comfort
Plus Hydronic heating
system. Read and follow
installation instructions
carefully.
HAZARDOUS VOLTAGE: Risk of electric shock. Can
cause injury or death.
• DO NOT energize the system until installation is
complete.
• DO NOT operate the Comfort Plus Hydronic heat-
ing system without the factory supplied junction
box in place. Connections to the primary loop
pump MUST be made inside the junction box. If
installing the optional air handler, the air handler
pump connections MUST also be made in the
junction box.
• Equipment must be installed by a qualified tech-
nician in compliance with all applicable local,
state, and national codes and regulations.
WARNING
Installation  3.05 Comfort Plus Hydronic Comfort Plus Hydronic Installation  3.06