Kenmore 5EW1.75 User Manual
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CHECKING AND ADJUSTING CONTROLS
A boiler using a tankless coil is configured with a Honeywell L8124C Combination Hi/Low Limit Aquastat
Relay (refer back to the SYSTEM PIPING section for more details). A boiler not using a tankless coil is
configured with a Honeywell L8148A Hi Limit Aquastat Relay. Instructions for the control provided are
included with the boiler.
IMPORTANT - You or your installer must follow these instructions carefully.
ADJUST OPERATING CONTROLS: For both aqaustats, use the following settings for the first
adjustment;
High Limit:
Baseboard and Convectors - 200°F
Standing Radiators - 180°F
Low Limit (when used) - 140°F (increase if hotter domestic water is required, but low limit set
point must be at least 20°F less than the high limit set point)
Differential (when used) - 10°F
ADJUST THERMOSTAT HEAT ANTICIPATOR TO: 0.2 AMPS
CHECK THERMOSTAT OPERATION: The thermostat location has an important effect on the operation
of the boiler system. Be sure to FOLLOW THE INSTRUCTIONS included with your thermostat. Typically
the thermostat is located about five feet above the floor on an inside wall. The thermostat should be located
to sense average room temperature, so avoid the following:
DEAD SPOTS - behind doors, comers, and alcoves
HOT SPOTS - concealed pipes, fireplace, TV sets, radios, lamps, direct sunlight, kitchens
COLD SPOTS - concealed pipes or ducts, drafty stairwells or door ways, unheated room or wall of
an unheated room
When the temperature on the thermostat is set above the indicated thermostat temperature, the boiler’s burner
should start. Make certain: once the room temperature reaches the selected temperature setting, the
thermostat should turn the boiler’s burner off, and once the room temperature falls a few degrees the boiler
starts operating again. Do not start the burner unless all cleanout doors are secured in place.
Do not attempt to start the burner when excess oil has accumulated, when the
unit is full of vapor, or when the combustion chamber is very hot.
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