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LNX15-574.2

August, 2021

INSTALLATION INSTRUCTIONS

Extended Vent Kit for Gas-Fired Furnace Options

Packaged Ventilation/Dedicated Outside Air System (DOAS)

model DLV

LNX15-574.2

5H0864980002

Application

For units with optional gas furnaces (Model Digit 17=2, 3, 5, 

or 6), the standard power exhauster discharge configuration is 

a horizontal exhaust cover for non-condensing (81% efficient) 

furnaces and a downturn elbow for condensing (90%+ efficient) 

furnaces.  In certain installations, such as close proximity to 

adjacent equipment or parapet walls, it is desirable to redirect 

the products of combustion vertically through an extended vent 

kit that terminates above the top of the unit as shown in Figure 

1.1. Agency approved extended vent kits are available for field 

installation as detailed on the following pages.

THIS MANUAL IS THE PROPERTY OF THE OWNER. 

PLEASE BE SURE TO LEAVE IT WITH THE OWNER WHEN YOU LEAVE THE JOB. 

 

1.  The use of this manual is specifically intended 

for a qualified installation and service agency.  

All installation and service of these kits must be 

performed by a qualified installation and service 

agency.

2.  These instructions must also be used in 

conjunction with the Installation and Service 

Manual originally shipped with the appliance, in 

addition to any other accompanying component 

supplier literature.

3.  Modifications to the kit may result in poor 

performance or nuisance alarms.  Do not change 

the contents of the kit or deviate from these 

instructions.

IMPORTANT

Figure 1.1 – Extended Vent Kit Installed

(C-Cabinet, Non-Condensing Heat Option Shown)

 CAUTION

As with any mechnical equipment, personal injury 

can result from contact with sharp sheet metal 

edges. Be careful when you handle this equipment.

 

1.  Improper installation, adjustment, alteration, 

service or maintenance can cause property 

damage, injury or death, and could cause 

exposure to substances which have been 

determined by various state agencies to cause 

cancer, birth defects or other reproductive harm. 

Read the installation, operating and maintenance 

instructions thoroughly before installing or 

servicing this equipment.

2.  Disconnect power supply before making wiring 

connections to prevent electrical shock and 

equipment damage.

WARNING

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