Lennox DR3530

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

Lennox DR3530 Specifications

General

Brand	Lennox
Model	DR3530
Category	Indoor Fireplace
Language	English

Summary

Installation Instructions Overview

Unit Dimensions and Specifications

Detailed physical dimensions and specifications for the DT/DTH/DR/DRH series fireplaces.

Shipping, Packing, and Requirements

Details package contents, damage checks, certifications, and applicable codes for installation.

General Installation and Location Selection

General advice, safety warnings, and guidance on selecting an optimal installation location.

Combustion Air and Installation Clearances

Information on combustion air requirements and critical clearance distances to combustibles.

Framing and Unit Installation

Instructions for framing the unit and step-by-step physical installation of the fireplace.

Venting System Installation and Termination

General Venting Requirements

Covers codes, standards, and general guidelines for vent system installation and sealing.

Vertical Venting Through the Roof

Instructions and figures for routing vent pipes vertically through the roof.

Horizontal Venting Installation and Termination

Guidance on routing vent pipes horizontally through walls and terminating them.

Exterior Horizontal Vent Termination Clearances

Specifies required clearances for horizontal vent terminations to exterior building elements.

Gas Piping and Unit Operation

Gas Piping Connection and Leak Check

Guidelines for connecting gas supply, safety precautions, and leak detection procedures.

Unit Start-up and Operation

Step-by-step guide for safely starting up and operating millivolt and electronic ignition models.

Adjustments and Troubleshooting

Pilot and Burner Flame Adjustments

Procedures for adjusting pilot flame and burner flame for optimal performance.

Troubleshooting Unit Failure to Operate

A checklist of common issues and checks when the fireplace unit fails to operate.

Service and Wiring

Service and Maintenance Procedures

Guidelines for annual inspection, cleaning, and servicing of the appliance.

Millivolt Gas Valve Wiring Diagram

Electrical schematic for the millivolt gas valve system, including optional fan kits.

Electronic Gas Valve Wiring Diagram

Electrical schematic for the electronic ignition gas valve system, including optional fan kits.

Parts and Components

Repair Parts List

Lists available replacement parts for the appliance.

Venting Kits and Available Components

Catalog of approved venting kits and related accessory components.