Warning, Important – Schwank 2-Stage Series User Manual
Page 5

5
SET(U)-F / ITT(U)-F Manual
IM091221
RD: FEB 2014
RL: 8B
Heater Expansion
It is a normal condition that during heat-up and cool-down a tube 
heater will expand and contract. Allowances for heater expansion 
must be made in the gas connection, venting and combustion air 
ducting. Improper installation, alteration, or adjustment can result in 
property damage, injury or death. Refer to Section 13  
WARNING
Venting
Inadequate venting of a heater may result in asphyxiation, carbon 
monoxide poisoning, injury or death. This heater may be directly or 
indirectly vented from the space. Venting must be in accordance with 
all local, state, provincial, and national codes (ANSI Z223.1/NFPA 54 
in USA; B149.1 in Canada) and as indicated in this manual. Refer to Sections 11 & 12
Gas Connection
Improper installation, connection, or adjustment can result in property 
damage, toxic gases, asphyxiation, injury or death. Using an ap-
proved flexible gas connector in the USA or Type 1 hose connector in 
Canada, the gas supply to the heater must be connected and tested 
in accordance with all local, state, provincial, and national codes (ANSI Z223.1/NFPA 54 in 
USA; B149.1 in Canada) and as indicated in this manual. 
Refer to Section 13
WARNING
WARNING
Start-Up ‘SMOKE’ Condition
During start up, the heating of material coatings used in the production process of tubes and 
reflectors will create smoke during the initial period of operation. This condition is normal and 
temporary . 
Ensure that there is sufficient ventilation to adequately clear any smoke from the space.
Notify site and safety personnel to ensure that alarm systems are not unduly activated.
IMPORTANT
THERMOSTAT SETTING FOR COMFORT
Infrared radiant (IR) heating system provide comfort with the effect of radiant heat and ambient
air heat.
If your IR system is controlled with a ThermoControl Plus controller that senses radiant heat, then
set the thermostat to the desired comfort temperature (ie: 65°; 68°; 20°C).
If your IR system is controlled with a standard 24V or 120V thermostat that senses only air tem-
perature, then start with a thermostat setting that is 5° to 7°F (3° to 5°C) lower than the desired
comfort temperature. Some trial and error setting may be required to ‘fine tune’ the comfort tem-
perature that best suits your site and provides most economical operation.
Unoccupied (night) set-back of 9°F (5°C) is recommended. Do not turn system ‘Off’.
WARNING
