45
RESET
button located on the user interface. The con-
trol will automatically reset after 1 hour. When in
lock-out the control will run the blower through a post-
purge cycle.
The single-try ignition module (part of the CSD-1
option) will attempt to light only one time before lock-
out occurs. To reset the lock-out, press and relase the
RESET
button located on the user interface.
Turning off the power to the heater WILL NOT reset
the single-try ignition module.
High Limit—Manual Reset
This heater is equipped with a fixed-setting manual re-
set high limit temperature device as standard. It may
also have an additional optional adjustable manual-
reset high-temperature device.
Standard
The fixed setting manual-reset high limit is built into
the PIM, it utilizes a dual-element sensor located on
the outlet (see Fig. 40). To reset a high limit lock-out,
press and release the RESET button located on the
user interface.
High Limit—Auto-Reset (Optional)
This heater may be equipped with an optional adjust-
able auto-reset high limit temperature device.
Adjust the setting to approx. 20°F (10°C) above
desired outlet temperature.
Flow Switch
The flow switch is provided as standard and is factory
mounted and wired. The switch shuts off heater in
case of pump failure or low water flow.
FIXED
LIMIT
SENSOR
ADJUSTABLE
RESET
Fig. 40: High Limit (Manual Reset)
Fig. 41: Adjustable High Limit (Auto Reset)
Fig. 42: Flow Switch
Summary of Contents for 992C
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