MORTEX G18D060AH2AA Quick start guide

1
These downow furnaces are specially designed for
installation in manufactured, (mobile home) or modular
housing. Four heat capacities and three blower choices
handle heating and cooling (up to 5 tons) in any climate.
All blowers are multi-speed to ne tune airow to the
home ensuring quiet operation, high operating efciency
and comfort.
FEATURES
HEATING ONLY or HEATING & A/C UNITS
ELECTRONIC IGNITION
SEALED COMBUSTION VENTING
ALUMINIZED STEEL HEAT EXCHANGER
ZERO CLEARANCE TO CONSTRUCTION
BUILT-IN ‘A’ COIL CABINET – 25-1/2”H ( C cab.)
SHORTER A/C FURNACE-ONLY 77-1/2”H
HOGS HAIR WASHABLE AIR FILTERS
CONTOURED WHITE DOOR PANELS
Model No. G18D060AH2AA G18D070AH2AA G18D077AH2AA G18D090AH2AA G18D060CA3AA G18D070CA3AA G18D077CA3AA G18D090CA3AA G18D060CA5AA G18D070CA5AA G18D077CA5AA G18D090CA5AA
Input, BTUH 60,000 70,000 77,000 90,000 60,000 70,000 77,000 90,000 60,000 70,000 77,000 90,000
Output, BTUH 48,000 56,000 61,600 72,000 48,000 56,000 61,600 72,000 48,000 56,000 61,600 72,000
AFUE, % 80 80 80 80 80 80 80 80 80 80 80 80
With A-Coil Cabinet YES YES YES YES YES YES YES YES YES YES YES YES
Ignition Type Auto-Elect Auto-Elect Auto-Elect Auto-elect Auto-Elect Auto-Elect Auto-Elect Auto-elect Auto-Elect Auto-Elect Auto-Elect Auto-elect
Air Temperature Rise, Range - F 40-70 40-70 40-70 45-75 40-70 40-70 40-70 45-75 40-70 40-70 40-70 45-75
Designed Max Outlet Air Temp-F 170 170 170 175 170 170 170 175 170 170 170 175
Natural Gas Orice Size 27 22 19 17 27 22 19 17 27 22 19 17
Propane (LP) Gas Orice Size 44 42 41 37 44 42 41 37 44 42 41 37
Blower-Heat or Heat/Cool 10 X 8, 1/4 HP, 2 SPD 10 X 8, 1/3 HP, 3 SPD 10 X 8, 3/4 HP, 4 SPD
Max. External SP (Duct), In.
W.C. 0.3
Fuel Natural Gas (Factory Equipped) - LP Orice Furnished
High Altitude For elevations above 2,000 feet, reduce input 4% for each 1,000 ft. elevation above sea level
Furnace Flue Pipe Must Use RJS Roof Jack for Sloped Roof or RJF Roof Jack for Flat Roof
Gas Connection 1/2" FPT
Electric Service 115 VAC, 60 Hz, 1 PH
Fuse or Circuit Breaker 15 Amp
Thermostat Circuit 24 VAC, 60 Hz, 40VA
Filters 2 - 16" X 20" X 1"
SEALED COMBUSTION
DOWNFLOW GAS FURNACE
SIZES: 60, 70, 77, 90
M ODELS : G18D SERIES
CAUTION: READ ALL SAFETY GUIDES
BEFORE INSTALLING THIS GUIDE
TECHNICAL GUIDE
“A” Cabinet “C” Cabinet
80 AFUE - AUTOMATIC HOT SURFACE IGNITION

56“
FURNACE
W/COIL CASE
SIDE
VIEW
FURNACE
W/COIL CASE
SIDE
VIEW
56“
AA
COMBUSTION AIR
COMBUSTION AIR
COMBUSTION AIR
COMBUSTION AIR
EXHAUST GASES
EXHAUST GASES
WARM AIR DUCTDUCT CONNECTOR
WARM AIR DUCT DUCT CONNECTOR
FLOOR FLOOR
FLOOR PLATE FLOOR PLATE
THIS JOINT MAY BE
ABOVE CEILING
17 1/2”
19 1/2”
3/12 PITCH ROOF FLAT-BOW RAFTER ROOF
77 1/2”
FURNACE
W/COIL CASE
SIDE
VIEW
FURNACE
W/COIL CASE
SIDE
VIEW
77 1/2”
“C” “C”
COMBUSTION AIR
COMBUSTION AIR
COMBUSTION AIR
COMBUSTION AIR
EXHAUST GASES
EXHAUST GASES
WARM AIR DUCTDUCT CONNECTOR
WARM AIR DUCT DUCT CONNECTOR
FLOOR FLOOR
FLOOR PLATE FLOOR PLATE
THIS JOINT MAY BE
ABOVE CEILING
17 1/2”
19 1/2”
G18D Series Gas Furnace TECHNICAL GUIDE
Mortex Products Inc. / Fort Worth, TX 76106 G18D Technical Guide
2
THE SEALED COMBUSTION VENT SYSTEM CONSISTS OF: FURNACE SERIES FURNACE SERIES
ROOF JACK BODY AND ROOF JACK CROWN G18D-A, 56” H G18D-C, 77 1/2” H
PART NO. TELESCOPING FOR: FLAT OR “A” “C”
ROOF JACK BODY RANGE SLOPED ROOF ADJUSTABLE HEIGHT ADJUSTABLE HEIGHT
90-RJF1729-AL 17” - 29” FLAT 73” - 85” 94 1/2” - 106 1/2”
90-RJF2551-AL 25” - 51” FLAT 81” - 107” 102 1/2” - 128 1/2”
90-RJS1729-AL 17” - 29” 3/12 73” - 85” 94 1/2” - 106 1/2”
90-RJS2551-AL 25” - 51” 3/12 81” - 107” 102 1/2” - 128 1/2”
90-RJS3868-AL 38” - 68” 3/12 94” - 124” 115 1/2” - 145 1/2”
90-RJS6399-AL 63” - 99” 3/12 119” - 155” 140 1/2 - 176 1/2”
PART NO. MUST USE
ROOF JACK CROWN WITH:
90-RJCRWN-AL ROOF JACK BODY

G18D Series Gas Furnace TECHNICAL GUIDE
Mortex Products Inc. / Fort Worth, TX 76106 G18D Technical Guide
3
Top ………………………………. ................ 6 in.
Sides ……………………………... ............... 0 in.
Back ……………………………… ............... 0 in.
Alcove-front of furnace …………. ............. 18 in.
Closet-front of furnace …………… .............. 6 in.
Duct ………………………………. ............... 0 in.
Vent/Roof Jack …………………… .............. 0 in.
* If the return air opening is below the top of the
furnace, clearance to the side or rear shall be 6”.
** See Return Air for clearances less than 6”.
G18D BLOWER PERFORMANCE CHART
CLEARANCES
PRODUCT CODE
G 18 D 060 A H 2 A A
G= Gas 18= D= 060,070 Cabinet Furnace Indoor Blower Type Of Blower Revision
80% Downow ,077, 090 Hight Conguration Air Flow (Ton) Motor Letter
AFUE U= Upow = Heating A= 56” H= Heating 2= 2 SPD1/4 HP A=PCS Motor
Input Only Motor
C= 77.5” A=Heating 3= 3 SPD 1/3 HP
and Motor
A/C Ready 4= 4 SPD 3/4 HP
Motor
5= 5 SPD 3/4 HP
Motor

87FB0005 FLOOR BASE,AND86AA000- DUCT
4.
3.
2.
1.
DUCT CONNECTOR ROTATES
(1-4) FOR ALIGNMENT TO DUCT
DUCT CONNECTOR A
88AA0013 4 1/2"
86AA0014 8 1/4"
86AA0015 12 1/4"
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--",-
G18D Series Gas Furnace TECHNICAL GUIDE
Mortex Products Inc. / Fort Worth, TX 76106 G18D Technical Guide
4
PART NO. DESCRIPTION NOTES
90-RJF1729-AL Body, Roof Jack, Gas-FLAT Height 94 1/2 X 106 1/2
90-RJF2551-AL Body, Roof Jack, Gas-FLAT Height 102 1/2 X 128 1/2
90-RJS1729-AL Body, Roof Jack, Gas-SLOPE 3/12 Height 94 1/2 X 106 1/2
90-RJS2551-AL Body, Roof Jack, Gas-SLOPE 3/12 Height 102 1/2 X 128 1/2
90-RJS3868-AL Body, Roof Jack, Gas-SLOPE 3/12 Height 115 1/2 X 145 1/2
90-RJS6399-AL Body, Roof Jack, Gas-SLOPE 3/12 Height 140 1/2 X 176 1/2
90-RJCRWN-AL Crown, Roof Jack, Gas Use w/Gas Roof Jack Body
90-TRN-RNG Ceiling Trim Ring, Roof Jack Trim out to inside RJ - Pipe
RJTRC Kit, Transit - Roof Jack -- Cap & Label For transport-Remove on site
90-OUTXT16-AL Roof Jack Outdoor Extension - Gas 16” Extend pipes / crown - 16 in.
90-INXST10-AL Roof Jack Indoor Extension - Gas 10” Extend pipes / crown - 10 in.
90-RJS56 5-6/ 12 Slope, Roof Saddle Adapter Add to RJS 3/12 Roof Jack
90-DCU0-01 86AA0013 Duct Conn + 87FB0005 Flr Base Floor to Duck 1 in. - 4 in.
90-DCU0-02 86AA0014 Duct Conn + 87FB0005 Flr Base Floor to Duck 6 in. - 8 in. STD
90-DCU0-03 86AA0015 Duct Conn + 87FB0005 Flr Base Floor to Duck 8 in. - 12 in.
90-CABEXT4 White, Top, Cabinet Extender Plate Fill alcove 76” top opening

UTEC & TI BOARD WIRING DIAGRAM
FLASH CODES
)/$6+ ,*1,7,21)$,/85( )/$6+(6 67($'<21 )/$6+(6 )/$6+(6 )/$6+(6 1250$/23(5$7,21 &20%867,21$,5 6:,7&+)$,/('72&/26( &20%867,21$,5 6:,7&+678&.&/26(' /,0,76:,7&+23(1 *$69$/9((1(5*,=(' :,7+12&$//)25+($7< )/$6+(6 5(9(56('32/$5,7<
%/2:(502725
%/80('
25*0('/2:
HEAT ONLY MODELS
7, Ê,]Ê£n
G18D Series Gas Furnace TECHNICAL GUIDE
Mortex Products Inc. / Fort Worth, TX 76106 G18D Technical Guide
5

UTEC & TI BOARD WIRING DIAGRAM
FLASH CODES
)/$6+ ,*1,7,21)$,/85(
)/$6+(6 67($'<21 )/$6+(6 )/$6+(6 )/$6+(6
1250$/23(5$7,21 &20%867,21$,5 6:,7&+)$,/('72&/26( &20%867,21$,5 6:,7&+678&.&/26(' /,0,76:,7&+23(1 *$69$/9((1(5*,=(' :,7+12&$//)25+($7< )/$6+(6
5(9(56('32/$5,7<
%/2:(502725
%/80('
25*0('/2:
A/C READY MODELS
7, Ê,]Ê£n
G18D Series Gas Furnace TECHNICAL GUIDE
Mortex Products Inc. / Fort Worth, TX 76106 G18D Technical Guide
6

G18D Series Gas Furnace TECHNICAL GUIDE
Mortex Products Inc. / Fort Worth, TX 76106 G18D Technical Guide
7
501 TerNJOBM3PBEt'Prt Worth, Texas 76106
817-624-0820

501 TerNJOBM3PBEt'Prt Worth, Texas 76106
817-624-0820 61GF0076