MORTEX G17D Installation Instructions Manual

FINAL PROCEDURE
INSTALL FURNACE DOOR PANELS
A. Install the lower door panel by engaging 2 tabs on
bottom cabinet pan into slots on plastic end cap. Then,
push in top of door panel until clips on the center divider
panel are engaged with latches on door.
B. Install the upper louver door panel in a similar manner,
by first engaging tabs on the center divider and then
pushing the panel in to engage the clips at top of the
cabinet.
FINISH AND TRIM
The alcove or closet installation may be finished and
trimmed out as needed.
GAS VALVE CONVERSION INSTRUCTIONS
1. Follow instructions "TO TURN OFF GAS TO APPLIANCE"
2. Remove two bolts securing the gas valve bracket. Pull gas valve
valve bracket and burner orifice holder exposing the main burner orifice.
3. Install burner orifice specified on the rating plate for the desired gas.
Conversion parts are in a bag attached to the gas valve.
4. Replace valve, bracket/orifice holder, and bolts.
Attach ID tag for the desired gas adjacent to the gas valve.
Ensure that all connections are tight.
5. Unscrew and reverse the pressure regulating cap so the name of the
desired gas is closest to the valve. See illustration.
HIGH ALTITUDE DERATE CHART- MAIN BURNER ORIFICE SIZE
ELEVATION 60,000 BTUH FURNACE 70,000 BTUH FURNACE
PART NO ORIF DIA. DRILL SIZE PART NO
SEA LEVEL 72AG-147 0.1470 26 72AG-159
2,000 72AG-144 0.1440 27 72AG-154
3,000 72AG-140 0.1405 28 72AG-154
4,000 72AG-140 0.1405 28 72AG-152
5,000 72AG-140 0.1405 28 72AG-149
6,000 72AG-136 0.1360 29 72AG-147
7,000 72AG-136 0.1360 29 72AG-144
8,000 72AG-128 0.1285 30 72AG-140
9,000 72AG-128 0.1285 30 72AG-140
10,000 72AG-128 0.1285 30 72AG-136
ELEVATION 60,000 BTUH FURNACE 70,000 BTUH FURNACE
PART NO ORIF DIA. DRILL SIZE PART NO
SEA LEVEL 72AG-089 0.0890 43 72AG-099
2,000 72AG-086 0.0860 44 72AG-098
3,000 72AG-086 0.0860 44 72AG-096
4,000 72AG-086 0.0860 44 72AG-096
5,000 72AG-082 0.0820 45 72AG-093
6,000 72AG-082 0.0820 45 72AG-093
7,000 72AG-081 0.0810 46 72AG-089
8,000 72AG-078 0.0780 47 72AG-089
9,000 72AG-078 0.0780 47 72AG-086
10,000 72AG-076 0.0760 48 72AG-086
Reference: NFPA No. 54, ANSI Z 223.1 National Fuel Gas Code
Table shows 4% Input Reduction per 1,000 feet elevation.
For Canadian High Altitude (2,000-4,500 feet), reduce gas pressure to burner manifold (manifold Ps.) to 3.0" W.C., and 9.0" W.C. for LP (Propane) Gas
16
P/N: 61GF0011 Mortex Products, Inc. / FT. WORTH, TX 76106
AIR CONDITIONING SYSTEMS
If an air conditioning system is installed which does not use
the blower for air distribution and operates completely
independent of the furnace, the thermostat system shall
include interlock, which prevents simultaneous operation of
the furnace and air conditioner. An interlock system
typically contains a switch, which must be turned to either
HEAT or COOL to activate either heating or cooling
operation. A cooling thermostat may include a positive OFF
switch for this purpose.
When used in connection with a cooling unit the furnace
shall be installed parallel with or on the upstream side of
the cooling unit to avoid condensation in the heat
exchanger. For installations with a parallel flow
arrangement, the furnace must be equipped with a damper
or other means to prevent cold air from being discharged
up around the heat exchanger.
NATURAL GAS
75,000 BTUH FURNACE 90,000 BTUH FURNACE
ORIF DIA. DRILL SIZE PART NO ORIF DIA. DRILL SIZE PART NO
0.1590 21 72AG-161 0.1610 20 72AG-180
0.1540 23 72AG-161 0.1610 20 72AG-177
0.1540 23 72AG-159 0.1590 21 72AG-173
0.1520 24 72AG-157 0.1570 22 72AG-173
0.1495 25 72AG-154 0.1540 23 72AG-169
0.1470 26 72AG-152 0.1520 24 72AG-166
0.1440 27 72AG-149 0.1490 25 72AG-161
0.1405 28 72AG-147 0.1470 26 72AG-161
0.1405 28 72AG-144 0.1440 27 72AG-157
0.1360 29 72AG-140 0.1405 28 72AG-152
LP-PROPANE GAS
75,000 BTUH FURNACE 90,000 BTUH FURNACE
ORIF DIA. DRILL SIZE PART NO ORIF DIA. DRILL SIZE PART NO
0.0995 39 72AG-101 0.1015 38 72AG-113
0.0980 40 72AG-099 0.0995 39 72AG-110
0.0960 41 72AG-098 0.0980 40 72AG-110
0.0960 41 72AG-096 0.0960 41 72AG-106
0.0930 42 72AG-096 0.0960 41 72AG-106
0.0930 42 72AG-093 0.0930 42 72AG-104
0.0890 43 72AG-093 0.0930 42 72AG-101
0.0890 43 72AG-089 0.0890 43 72AG-101
0.0860 44 72AG-089 0.0890 43 72AG-098
0.0860 44 72AG-086 0.0860 44 72AG-096
G17 / G18 Installation Instructions Printed 04/04
SEALED COMBUSTION
DOWNFLOW
GAS FURNACE
FOR INSTALLATION IN: MANUFACTURED (MOBILE) HOMES,
RECREATIONAL VEHICLES, PARK MODELS, MODULAR HOMES AND
BUILDINGS
Contents
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Installation Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
High Altitude Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Installation Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Return Air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5
Alcove & Closet Installations . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Air Distribution Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Duct Connector/Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Install Furnace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Roof Jack Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Cut Openings & Install Roof Jack . . . . . . . . . . . . . . . . . . . . . . . .8
Installing in Snow Regions . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Roof Jack On Hi-Pitch Roof . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Transit-mode Roof Jack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-9
Connect Power Supply Wires . . . . . . . . . . . . . . . . . . . . . . . . . .9
Wall Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Connect Thermostat Wires . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Gas Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-10
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-13
Repair Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-15
Final Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Furnace and Air Conditioner Installations . . . . . . . . . . . . . . . . .16
High Altitude Deration Chart . . . . . . . . . . . . . . . . . . . . . . . . . .16
ORIF DIA. DRILL SIZE
GENERAL INFORMATION
0.1800 15
0.1770 16
0.1730 17
These downflow sealed combustion furnaces install in
0.1730 17
0.1690 18
Manufactured Homes, Recreational Vehicles or modular
0.1660 19
construction. The furnaces conform to Part 3280 (a) (2) of HUD
0.1610 20
0.1610 20 Manufactured Home Construction and Safety Standards. They
0.1570 22
must be installed only with listed RJ-Roof Jack, sealed
0.1520 24
combustion venting system.
ORIF DIA. DRILL SIZE
NOTE: These instructions are intended to assist qualified
0.1130 33
individuals experienced in the installation of heating equipment.
0.1100 35
0.1100 35 Some state and local codes require installation personnel to be
0.1065 36
licensed. Read all instructions before starting the installation.
0.1065 36
0.1040 37
0.1015 38
SAVE THIS MANUAL
0.1015 38
0.0980 40
0.0960 41
Mortex Products, Inc. / FT. WORTH, TX 76106

INSTALLATION INSTRUCTIONS

G17D, G18D
Sizes 060-090
CAUTION: READ ALL SAFETY GUIDES
BEFORE INSTALLING THIS FURNACE
Page
WARNING-RISK OF FIRE OF ELECTRICAL SHOCK
Only qualified service personnel shall be used to install
and provide maintenance of this furnace.
- A furnace set-up and any adjustment needed is the
NOTICE
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 correctly
converted to L.P. Gas where applicable?
3. Is the gas line outlet pressure set for the fuel used?
NAT Gas is 3.5" W.C. and L.P. Gas is 10.0"W.C.
4. If the home uses a crossover air connector duct, is it installed
per the homebuilders installation instruction?
5. Has the furnace been operated through a complete
heating cycle?
G17 / G18 Installation Instructions Printed 04/04
1