MORTEX PRODUCTS INC 501 TERMINAL RD FORT WORTH, TX 76106 Page 1
DOWNFLOW ONLY For Installation In:
SINGLE STAGE GAS FIRED FURNACE 1. Manufactured (Mobile) Homes
MODELS: G18D SERIES 2. Recreational Vehicles
3. Modular Homes & Buildings
For installation only in HUD manufactured homes per Construction Safety 24 CFR Part 3280
USERS INFORMATION MANUAL
3 – Startup and Shutdown Instructions .......................................................... 6
4 – Homeowner/User Maintenance ................................................................. 8
5 – Troubleshooting .............................................................................................18
6 – Blower Performance ...................................................................................... 23
7 – Accessories and Replacement Parts ........................................................ 23
8 – Wiring Diagrams .............................................................................................27
13 – Flue Box Assembly .....................................................................................................14
14 – Combustion Air Assembly ..........................................................................15
15 – Blower Assembly ........................................................................................... 15
16 – Component Locations .................................................................................16
17 – White Rodgers Gas Valve .............................................................................20
18 – Measuring Inlet (Supply) Gas Pressure ...................................................20
19 – Measuring Outlet (Manifold) Gas Pressure .......................................... 20
20 – Integrated Furnace Control Board ...........................................................22
21 – Replacement Parts Identication ............................................................. 24
22 – Wiring Diagram – Heating Only Models ................................................27
23 – Wiring Diagram – A/C Ready Models ......................................................28
6 – Blower Performance Chart ....................................................................................23
7 – Accessories ................................................................................................................23
8 – Replacement Parts List ..................................................................................... 25
9 – Hight Altitude Gas Orice Chart ..................................................................... 26
1 – Safety .....................................................................................................................2
2 – Homeowner/User Information .................................................................... 5
1 – Safety .................................................................................................................. 10
2 – Furnace Maintenance .................................................................................. 11
3 – Furnace Controls ............................................................................................ 15
4 – Sequence of Operation ............................................................................... 17
The following list includes important facts and information regarding this gas furnace.
1. Furnace is rated at 115 VAC at 60 Hz.
2. Furnace is available in “Heating Only” or “A/C Ready” congurations.
3. Furnace is designed for use with cooling only or heat pump systems when a cooling coil cabinet and indoor coil is used. A/C
ready models are furnished with a cooling coil cabinet. The appropriate indoor coil must be selected and ordered separately.
4. A hold-down strap is furnished with furnace.
5. This furnace is designed for downow applications only.
6. This furnace must not be operated with the control box cover or front access panels removed.
7. This furnace is certied by ETL for use in the United States only.
SAVE THIS MANUAL FOR FUTURE REFERENCE
1 – Component Locations ..................................................................................... 4
2 – Burner Flame ...................................................................................................... 4
3 – Furnace Examination Checkpoints .............................................................5
4 – White Rodgers Gas Valve Components .....................................................7
5 – Gas Supply Line Piping and Shuto Valve Location .............................7
6 – Louvered Return Air Door - Outside ..........................................................8
7 – Louvered Return Air Door Filter Rack ...................................................................8
8 – Burner Assembly ......................................................................................................... 11
9 – Heat Exchanger Assembly w/ Baes ..................................................... 12
10 – 4” Combustion Air Tube Flange ................................................................ 13
11 – Top Cover Screws and Combustion Air Pan Screws .......................... 13
12 – Flue Box Cover Screws.................................................................................. 13
1 – Inlet Gas Pressure Range ...................................................................................20
2 – Nominal Manifold Pressure ........................................................................... 20
3 – Input Calculations For Cubic Foot Gas Meter ........................................... 21
4 – Input Calculations For Cubic Meter Gas Meter ........................................ 21
5 – Dip Switch Settings - Circ Blr Mtr Speeds & Htg Blower O Delay ..... 22
Manufactured and Distributed by: Mortex Products Inc www.mortx.com
501 Terminal Rd
Fort Worth, TX 76106
LIST OF SECTIONS - USERS INFORMATION MANUAL
LIST OF SECTIONS -SERVICE AND MAINTENANCE MANUAL
LIST OF FIGURES
LIST OF TABLES
CONTACT INFORMATION
To Next Page
Need help?
General