AERCO BMK 1.5 LN June 2010 - Manual (Page 38)

INITIAL START-UP
4-6
4.5 OVER-TEMPERATURE LIMIT
SWITCHES
The unit contains both automatic and manual
reset over-temperature limit switches. These
switches are mounted on a plate next to the
VFD as shown in Figure 4-6. The switches can
be accessed by opening the front panel door of
the unit. The manual reset switch is not
adjustable and is permanently fixed at 210°F.
This switch will shut down and lock out the boiler
if the water temperature exceeds 210°F.
Following an over-temperature condition, it must
be manually reset by pressing the RESET
button before the boiler can be restarted. The
automatic reset over-temperature switch is
adjustable and allows the boiler to restart, once
the temperature drops below its temperature
setting. Set the automatic over-temperature
switch to the desired setting.
Figure 4-6
Over Temperature Limit Switch
Locations