Steffes 6140 - Manual (Page 3)

SAFETY PRECAUTIONS
1. DO NOT energize the system while disassembled or
until system installation is complete.
2. DO NOT use or store materials that may produce
explosive or flammable gases near the system.
3. DO NOT violate the placement and clearance require-
ments specified in this manual (Pages 3.02-3.03).
4. DO NOT place anything on top of the system.
5. Disconnect power to all circuits before servicing. This
heating system may be connected to more than one
branch circuit.
6. Installation of and/or service to this heating system
should be performed by a qualified technician in compli-
ance with information contained herein and with national,
state, and local codes and regulations.
7. A repeated message of “CORE FAIL” indicates a need
for service by a qualified technician.
BUILT-IN SAFETY DEVICES
The Comfort Plus Commercial heating system incorporates safety devices to ensure normal operating temperatures
are maintained. The chart below describes these safety devices.
Comfort Plus Commercial Safety Information
WARNING
Hazardous Voltage: Risk of
electric shock. Can cause injury
or death. This system may be
connected to more than one
branch circuit. Disconnect
power to all circuits before
installing or servicing. Installa-
tion of and/or service to this
equipment MUST be performed
by a qualified technician.
Risk of fire. Can cause injury or
death. Violation of the clear-
ance requirements can cause
improper operation of the
system. Maintain the placement
and clearance requirements
specified.
DEVICE NAME FUNCTION
Core Charging High Limit
Switches (Auto Reset)
These limit switches monitor brick core
charging and interrupt power to the heating
elements if the normal operating temperature
is exceeded.
In the limit bar panel on
the left side of the brick
storage cavity.
Core Blower Limit Switch
(Auto Reset)
This limit switch monitors the discharge air
temperature and interrupts power to the core
blowers if the normal operating temperature
is exceeded.
170 o F / 77 o C (nominal)
On the discharge air
supply blower.
Supply Air Blower Limit
Switch (Manual Reset)
This limit switch monitors the discharge air
temperature and interrupts power to both the
supply air blower and the core blowers if the
normal operating temperature is exceeded.
190 o F / 88 o C (nominal)
On the discharge air
supply blower.
Base Temperature Limit
Switch (Auto Reset)
This limit switch monitors the temperature in
the base of the system and interrupts power
to the core blowers if the normal operating
temperature is exceeded.
160 o F / 71 o C (nominal)
In the base of the system
near the core blowers.