Owner`s manual
10 
SET(U)-F / ITT(U)-F Manual 
IM091221 
RD: FEB 2014 
RL: 8B 
 WARNING 
Improper installation, adjustment, alteration, service or maintenance can cause 
property damage, injury or death. Read and understand this installation and 
operation manual thoroughly prior to assembly, installation, operation or service to 
this appliance. 
This heater must be installed and serviced only by a trained gas service technician. 
Do not store or use gasoline or other flammable vapours and liquids in the vicinity 
of this or any other gas fired appliance. 
Failure to comply could result in personal injury, death, fire and/or property damage. 
Do not store or use gasoline or other flammable vapours and liquids in the vicinity 
of this or any other gas fired appliance. 
5.  PRE INSTALLATION SURVEY 
It is recommended that a full heating design including heat loss calculation be conducted on 
the structure or area to be heated. Heater sizing and placement must consider available 
mounting height, sources of greatest heat loss, and the certified clearances to combustibles 
with respect to stored material, moveable objects (cranes, vehicles, lifts, overhead doors, etc), 
sprinkler system heads, and other obstructions on the site. Consideration must also be given to 
vent / duct placement and the allowable combined lengths of vent and duct. Carefully survey 
the area to be heated, and for best results place burner and combustion chamber in the coldest 
area(s) . 
Installation must conform with all local, state, provincial and national code requirements includ-
ing the current latest edition ANSI Z223.1 (NFPA 54) in the U.S.A. and B149.1 installation 
code in Canada, for gas burning appliances and equipment. The latest edition Electrical Code 
ANSI/NFPA N0 70 in the U.S.A. and PART 1 CSA C22.1 in Canada must also be observed. 
The heating system must have gas piping of the correct diameter, length, and arrangement to 
function properly. For this reason, a layout drawing is necessary.  










