GL16 Operating Principles
5-7
5.3 Exhaust System
Components that make up the exhaust system
are located in the exhaust canopy. These
components include:
• Exhaust Blower
• Sail Switch
Exhaust Blower
The exhaust blower (Figure 5-5, A) draws used
air and combustion by-products from under the
canopy and discharges them through an attached
vent duct at the required rate.
Sail Switch
The sail switch (Figure 5-5, B) is located in the
discharge of the exhaust blower (A). The sail
switch contacts are closed when air, exhaust
combustion by-products, and excess heat are
being vented through the exhaust ductwork.
When air movement stops or is restricted in the
exhaust ductwork, the sail switch contacts open,
and the burner system shuts down.
5.4 Heating System
The heating system consists of the following
components:
• Safety Interlock Circuit
• Burner System
• Flame Safeguard
• Temperature Control System
• Touchless Temperature Sensors and UV
Flame Scanners
These systems work together to monitor and
control the operation of the heating system. For
detailed electrical information within this manual,
proceed to the SCHEMATICS section.
Safety Interlock Circuit
Safety interlock circuit components work
together to monitor the operation of the heating
system and shut down the burner, if necessary.
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Figure 5-5: The exhaust blower (A) and sail
switch (B) are located on top of the
exhaust canopy.
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General