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©
2003
Litho U.S.A.
Lennox Industries Inc.
Dallas, Texas, USA
INSTALLATION
INSTRUCTIONS
TUA*S(N,L)(A,S)F
*045, 060, 075, 100, and 125
T-CLASS
TM
SEPARATED COMBUSTION
UNIT HEATERS
Table Of Contents
Unit Dimensions……………………………… 1, 2 Leak Check……………………………………….. 13
Shipping……………………………………… 3 Start-up Operation………………………………... 14
Requirements………………………………… 3 Heating Sequence of Operation………………… 16
Unit Heater Installation……………………… 4 Ignition Control LED……………………………… 16
Combustion & Ventilation
Air…………………
4 Adjustments…………………….…………………. 17
Venting………………………………………… 5 Service…………………………………………….. 19
Electrical Connections……………………… 12 Wiring Diagram………………….……………….. 20
Gas Connection……………………………… 13
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
WHAT TO DO IF YOU SMELL GAS:
Do not store or use
g
asoline or
other flammable vapors and
liquids in the vicinit
y
of this or an
y
other appliance.
Installation and service must be
performed by a qualified installer,
service agency or the gas supplier.
• Do not try to light any appliance.
• Extinguish any open flame.
• Do not touch any electrical switch; do not use any
phone in your building.
• Immediately call your gas supplier from a neighbor's
phone. Follow the gas supplier's instructions.
• If you cannot reach your gas supplier; call the fire
department.
If the information in this manual is not
followed exactly, a fire or explosion
may result causing property damage
,
p
ersonal injury or loss of life.
WARNING
P/N: 065354800 ORGINATED: 5/04 REVISED: 11/04 SUPERSEDES: NEW
Technical literature form number 504,955M