Litho USA
Page 1
This appliance may be installed in an aftermarket
permanentlylocated,manufactured(mobile)home,
wherenot prohibitedbylocalcodes.Thisappliance
is only for use with the type of gas indicated on the
rating plate. This appliance is not convertible for
use with other gases, unless a certified kit is used.
DR4035 FLUSH-FACED MODEL SHOWN
E
2001 Lennox Industries Inc.
Dallas, Texas
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
INSTALLATION
INSTRUCTIONS
DT/DTH/DR/DRH
MERITt
Series
DIRECT VENT
VENTED GAS FIREPLACE/
VENTED GAS FIREPLACE HEATER
850,010M
05/2001
Supersedes 504,023M 11/99
Table of Contents
DT/DTH/DR/DRH Unit Dimensions 2..................
Merit
t
Series DT/DTH/DR/DRH 2....................
Shipping and Packing List 3..........................
Requirements 3....................................
General 3.........................................
Combustion Air 4...................................
Location Selection 4................................
Installation Clearances 5............................
Framing 6.........................................
Installation 6......................................
Venting 12.........................................
Gas Piping 21......................................
Unit Start-up 21....................................
Adjustments 23.....................................
Service 24.........................................
Wiring Diagram - Millivolt Gas Valves 24...............
Wiring Diagram - Electronic Gas Valves 25.............
Repair Parts List 25.................................
Venting Kits & Available Components 26...............
WHAT TO DO IF YOU SMELL GAS:
If the information in this manual is not
followed exactly, a fire or explosion
may result causing property damage,
personal injury or loss of life.
WARNING
Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any 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.
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.
Extinguish any open flames.
FORYOURSAFETY
WH Report No. J20046561
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