United States Stove HOTBLAST 1950 Benutzerhandbuch

 

19

 

 
PROBLEM 

 
CAUSES 

 
SOLUTIONS 

 
Heating inefficient during the first 
combustions.  Lack of draft. 

 
Improper adjustment of the 
barometric damper (opened too 
wide).  Chimney flue restriction (too 
long., or too many 90

o

 elbows) 

 

 
Adjust the damper, minimize the 
chimney length and use 45

o

 elbows. 

 
Furnace heats well, warm air plenum 
is very hot by there is not much heat 
coming out in the room. 

 
Improper installation of the ducts, 
little static pressure, unbalanced 
system (too many warm air outlets 
and not enough cold air inlets). 
 

 
Reinstall the ducts correctly. 
Respect the minimum static pressure 
of 0.20 in. w.c. 

 
Furnace consumes a lot of wood. 

 
The thermostat which controls the 
damper is continuously activated or 
is too close to a source of cold air.  
Damper not properly adjusted.  
House not insulated enough.  Ash 
drawer is not tightly closed.  Furnace 
too small for the surface to be 
heated. Unbalanced ventilation 
system, very little heat where the 
thermostat is located. 
 

 
Relocate the thermostat. Adjust the 
chain that links the damper to the 
damper motor.  Rebalance the 
ventilation system in order to 
increase the air flow in the room 
where the thermostat is located. 

 
Fan start-up is too slow. 

 
Fan “ON” setting too high.  Return air 
is too cold (temperature lower than 
65 degrees).  Limit control not well 
located in the warm air plenum. 

 
Lower the temperature starting point.  
The “fan ON” setting on limit control 
is set at 150°F, it may reduced in 
some particular installations. Reduce 
the fresh air flow. Relocate the limit 
control. 
 

 
A lot of creosote, moderate heat 
output. 

 
Wet wood, lack of draft.  Barometric 
damper not properly adjusted.  Dirty 
chimney. 
 

 
Use dry wood.  Adjust the barometric 
damper.  Clean the chimney flue and 
the furnace exchangers. 

 
Furnace heats a lot but the warm air 
plenum does not get hot. 

 
Wet wood or low grade wood.  Too 
much cold air return for the hot air 
ducts.  Unbalanced ventilation 
system. Blower speed too high 
 

 
Use dry wood.  Reinstall the 
ventilation system correctly. Use a 
lower blower speed. 

 

FOR, INSTALLATION OF A CENTRAL HEATING VENTILATION SYSTEM, IT IS HIGHLY 

RECOMMENDED TO CONSULT A HEATING SYSTEM VENTILATION SPECIALIST. 

N.B.:  UNITED STATES STOVE COMPANY IS NOT RESPONSIBLE FOR POOR APPLIANCE 

PERFORMANCES, DUE TO AN IMPROPER INSTALLATION.