MORTEX G18D SERIES Installation Instructions Manual

SEALED COMBUSTION
DOWNFLOW GAS FURNACE
M ODELS :
G18D SERIES,
FOR INSTALLATION IN: MANUFACTURED (MOBILE)
HOMES, RECREATIONAL VEHICLES, PARK MODELS,
MODULAR HOMES AND BUILDINGS.
CONTENTS
General Information ...........................................
Speci cations ...................................................
Safety Conditions ..............................................
Installation Standards .........................................
High Altitude Installation ....................................
Installation Clearances .......................................
Return Air ......................................................
Alcove & Closet Installation ................................
Air Distribution Systems ......................................
Duct Connector/Base .........................................
Install Furnace ...................................................
Roof Jack Selection ............................................
Cut Opening & Install Roof Jack
Installing In Snow Regions ..................................
Roof Jack On High-Pitch roof ...............................
Connect Power Supply Wires ..............................
Wall Thermostat ................................................
Connect Thermostat Wires ..................................
Gas Piping ..................................................
High Altitute Deration Chart ..............................
Final Procedure ...............................................
Furnace & Air Conditioner Installation ................
Blower Performance Chart ................................
Wiring Diagrams .......................................

GENERAL INFORMATION

These down ow 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 quali ed
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
INSTALLATION INSTRUCTIONS
SIZES: 60, 70, 77, 90
PAGE
1
2
3
3
3
3
4-5
5
6
6
7
7
.......................... 8
8
8
9
9
9
9-10
11
12
12
13
14-16
CAUTION: READ ALL SAFETY GUIDES
BEFORE INSTALLING THIS GUIDE
WARNING
!
RISK OF FIRE OR ELECTRICAL SHOCK
Only quali ed service personnel shall be used to
install and provide maintenance of this furnace.
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 ori ce
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.
1