Winchester by Mortex Products Inc. / Fort Worth, TX 76106
WG Series Installation Instructions
1
SEALED COMBUSTION
DOWNFLOW GAS FURNACE
MODELS:
W G SERIES,
SIZES: 60, 70, 77, 90
FOR INSTALLATION IN:
MANUFACTURED (MOBILE)
HOMES, RECREATIONAL VEHICLES, PARK MODELS,
MODULAR HOMES AND BUILDINGS.
GENERAL INFORMATION
These down flow sealed combustion furnaces install in
Manufactured Homes, Recreational Vehicles or Modular
Construction. The furnaces conform to Part 3280 (a)(2)
of HUD Manufactured Homes Construction and Safety
Standards. They must be installed only with listed RJ-Roof
Jack, Sealed Combustion venting system.
NOTE:
These instructions are intended to assist qualified
individuals experienced in the installation of heating
equipment.
Some state and local codes require installation
personnel to be licensed. Read all instructions before
starting the installation.
SAVE THIS MANUAL
NOTICE
– Furnace set-up and any adjustment needed is
responsibility of the installer/retailer/ contractor and is
not covered by the furnace manufacturers warranty.
CHECKLIST: FURNACE START-UP
1. Has furnace roof jack crown been correctly installed.
2. Has the furnace gas valve and burner orifice
been cleaned.
3. Is the gas line outlet pressure set for the fuel used.
4. If the home uses a crossover air connector duct, is it
installed per homebuilders installation instructions.
5. Has furnace been operated through complete
heating cycle.
CONTENTS
PAGE
General Information ................................................................ 1
Specifications ............................................................................ 2
Safety Conditions ..................................................................... 3
Installation Standards ............................................................. 3
High Altitude Installation ...................................................... 3
Installation Clearances ........................................................... 3
Return Air .................................................................................. 4-5
Alcove & Closet Installation ................................................ 5
Air Distribution Systems ......................................................... 6
Duct Connector/Base ............................................................. 6
Install Furnace ............................................................................ 7
Roof Jack Selection .................................................................. 7
Cut Opening & Install Roof Jack ........................................ 8
Installing In Snow Regions .................................................... 8
Roof Jack On High-Pitch roof ................................................ 8
Connect Power Supply Wires .............................................. 9
Wall Thermostat ........................................................................ 9
Connect Thermostat Wires .................................................... 9
Gas Piping ............................................................................. 9-10
Wiring Diagrams
................................................................
11
.14-16
Final Procedure
.........................................................................
Furnace & Air Conditioner Installation ..............................
12
High Altitute Deration Chart
................................................
12
Blower Performance Chart......................................................13
INSTALLATION INSTRUCTIONS
CAUTION: READ ALL SAFETY GUIDES
BEFORE INSTALLING THIS GUIDE
GAS-FIRED
LISTED
U
L
®
RISK OF FIRE OR ELECTRICAL SHOCK
Only qualified service personnel shall be used to
install and provide maintenance of this furnace.
