LAARS Mighty Therm LO-NOx PW (Sizes 500-1825) - Install and Operating Manual - Manual (Page 16)

LAARS HEATING SYSTEMS Page 16
Figure 17. Controls Location.
Figure 18. Operating and Safety Components.
4.1.5 High Limit Control
The manual reset high limit switches are
provided as standard equipment on all heaters.
Automatic reset switches are optionally provided. The
temperature sensing bulb of the switch is always
located in the heater outlet. Burners will automatically
shut down whenever overheating of water occurs
(exceeding the temperature set point of the switch).
4.1.6 Flow Switch
Standard on all models: The switch is mounted
in the outlet “tee” connection. The flow switch shuts
down all burners in case of pump failure and/or
reduced water flow.
4.1.7 Low Water Cut Off
The low water cut off automatically shuts off the
heater whenever water level drops below probe. The
probe is located at the heater water inlet header.
4.2 Start-Up Requirements
WARNING
Do not use this appliance if any part has been
under water. Immediately call a qualified
service technician to inspect the heater. The
possible damage to a flooded appliance can be
extensive and present numerous safety
hazards. Any appliance that has been under
water must be replaced.
NOTE: Indoor unit shown. Outdoor unit, door must be removed to access controls.