Utica Boilers UB90-200 Installationsanweisungen

 HI TEMP illuminates when boiler water temperature 

reaches high limit setting. Remains lit until water 

temperature falls 10°F. Limit prevents burner operation 

while this LED is on.

 LWCO ACTIVE Indicates low water cut-off function is 

active. When control is installed with Electro-well, LED is 

on at all times when control is powered. If the control is 

installed with a well other than Electro-well, LED will not 

illuminate indicating the control is not providing low water 

cutoff functionality.

Burn and scald hazard. Do not add water until boiler 

has fully cooled. Failure to follow these instructions 

could result in death or serious injury.

  

 LWCO  LOW WATER Illuminates if boiler is in low water 

condition. Control will prevent burner operation during this 

condition.  
Important: System must be checked by qualified service 

agency prior to resuming operation.

 ECONOMY  ACTIVE Indicates that thermal targeting 

function is active and control reduces boiler temperature 

to conserve fuel.  Economy feature is activated using the 

ECONOMY dial. 
  

 

ECONOMY  TARGET  When feature is active, control 

continually sets target temperatures below high limit 

setting to maximize fuel efficiency. When boiler reaches 

target temperature, LED illuminates  and burner shuts 

down.  Boiler water continues to circulate and het the 

house as long as thermostat call continues.  LED stays lit 

until boiler temperature drops below differential at which 

point boiler will be allowed to fire again. 
Note: LED illuminates regularly during normal boiler 

operation.

  

PURGE Control is purging latent heat from boiler and 

will not fire until temperature drops to 135°F. 

LWCO To Test LWCO: Press and hold TEST button. Red 

Low Water light will illuminate and burner circuit will de-

energize.