AERCO BMK 3.0 LN Nat. Gas for Mass. only - Manual (Page 40)

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 attached to the
boiler shell as shown in Figure 4-6. The switches
can be accessed by removing the left side
panels 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