MORTEX G18D Series Installation Manual
Downflow only gas furnace, sizes 60, 70, 77, 90
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Also See for G18D Series:
- Installation manual (34 pages) ,
- User's information manual (30 pages) ,
- Installation instructions manual (16 pages)
Table of Contents
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DOWNFLOW ONLY GAS FURNACE
SIZES 60, 70, 77, 90
MODELS: G18D SERIES
6 - Air Distribution Systems - Graduated trunk duct
7 - Furnace Base Openings, Fuel, Electric & A/C Line Penetrations 9
8 - Duct Connector Depths
10 - White Rodgers 36J29 Gas valve
12- Furnace Component Locations
13 - Separate T'stat, Furnace & Cooling Unit WD
14 - Separate T'stat, furnace, Cooling Unit & Trans W.D.
15 - Same T'stat, Separate Furnace, Cooling Unit & Trans W.D.
16 - Same T'stat Separate Furnace, Heat Pump and Transformers
17 - Same T'stats Separate Furnace, Cooling Unit and Transformers 18
3 - High Altitude Gas Orifice Chart
5 - Ratings and Physical Electrical Data
6 - Heating Only Models 1/3 HP Blower and Motor Rating
7 - A/C Ready Models 1/3 HP Blower & Motor Rating
8 - A/C Ready Models 3/4 HP Blower & Motor Rating
9 - Low Voltage, Wire Gage and Max Lengths
SECTION I: SAFETY
This is a safety alert symbol. When you see this symbol on
labels or in manuals be alert to the potential for personal injury.
Understand and pay particular attention to the signal words
DANGER, WARNING, or CAUTION.
DANGER: indicates an imminently hazardous situation, which if
not avoided, will result in death or serious injury.
WARNING: indicates a potentially hazardous situation, which if
not avoided, could result in death or serious injury.
CAUTION: indicates a potentially hazardous situation, which if
not avoided, may result in minor or moderate injury. It is also
used to alert against unsafe practices and hazards involving
property damage.
SAVE THIS MANUAL FOR FUTURE REFERENCE
MORTEX PRODUCTS INC
INSTALLATION MANUAL
LIST OF SECTIONS
LIST OF FIGURES
LIST OF TABLES
501 TERMINAL RD FORT WORTH, TX 76106
CATEGORY I MOBILE HOME GAS FURNACE
1
5
8
8- Blower Performance
10
9 - Wiring Diagrams
14
7
18 - Typical Single Stage Heat / Cool Digital T'stat 2 Stage Furnace 18
8
19 - Typical 2 Stage Heating/Cooling Digital T'stat Connections
8
9
9
9
23 - Roof Jack Assembly (Slope Saddle)
9
25 - Combustion Air Path thru the Roof Jack & Thru the Pipes
Outside Ambient Combustion Air Openings and Ducts
10
26 -
11
11
16
17
17
17
18
33 - Wiring Diagram A/C Ready Furnace
6
10 - Recommended Thermostat Wire Colors & Connections
7
13
14
14
15
15 - Input calculations for a Mj/m³ Gas Meter
15
15
16
19
27
32
33
18
20
20
20
21
21
22
23
24
25
26
29
29
30
33
34
19
22
24
26
28
28
29
32
Page 1
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Summary of Contents for MORTEX G18D Series
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Page 1: Table Of Contents
INSTALLATION MANUAL DOWNFLOW ONLY GAS FURNACE SIZES 60, 70, 77, 90 MODELS: G18D SERIES CATEGORY I MOBILE HOME GAS FURNACE LIST OF SECTIONS 1 – Safety 6 – Combustion Air and Vent System 2 – General Information 7 – Furnace Startup, Diagnostics and Sequence of Operation 3 –... -
Page 2: Sizes
18. Roof Jack Sizes: space containing the furnace. Mortex is a 4” Vent Pipe with a 7” Combustion Air Pipe. 9. The return air duct system is not required by the Coleman is a 5” Vent Pipe with a 8” Combustion Air Pipe. -
Page 3: Safety
Burning Appliances and Equipment”. cleaning exterior surfaces or replacing the air filters. When Canadian Electrical Code, Part I (CSA C22.1) working on heating equipment, observe precautions in the g. All local, State, City, Township and Provincial Codes. MORTEX PRODUCTS INC 501 TERMINAL RD FORT WORTH, TX 76106 Page 3 ... - Page 4 Any wiring different from the wiring diagram could result in a hazard to persons and property. 3. Any original factory wiring that requires replacement must be replaced with wiring material having a temperature MORTEX PRODUCTS INC 501 TERMINAL RD FORT WORTH, TX 76106 Page 4 ...
- Page 5 If damage is evident, the extent of the damage should be noted on the carrier’s freight bill. A separate request for inspection by the carrier’s agent should be made in writing. Also, before installation the furnace should be MORTEX PRODUCTS INC 501 TERMINAL RD FORT WORTH, TX 76106 Page 5 ...
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Page 6: Furnace Clearances To Combustibles
TOP LEFT SIDE RIGHT SIDE BACK FRONT FRONT DUCT ROOF JACK ALCOVE CLOSET 6 in 0 in 0 in 0 in 18 in 6 in 0 in 6 in Table 1: Furnace Clearances to Combustibles MORTEX PRODUCTS INC 501 TERMINAL RD FORT WORTH, TX 76106 Page 6 ... -
Page 7: Furnace Dimensions
Total Height gas fired appliance or equipment horizontal exhaust vent Heating Only 51.852” + 4” = 55.852” terminal. The sign shall be in print of no less than one-half (1/2) A/C Ready 51.852” + 25.5” = 77.352” MORTEX PRODUCTS INC 501 TERMINAL RD FORT WORTH, TX 76106 Page 7 ... -
Page 8: General Information
If the holes do not line up then, the duct connector must be replaced. The duct system is a very important part of the installation. If the Figure 2: Duct Connector Dimensions duct system is improperly sized the furnace will not operate MORTEX PRODUCTS INC 501 TERMINAL RD FORT WORTH, TX 76106 Page 8 ... -
Page 9: Air Distribution System - Single Trunk Duct
Important: Fabricate and install an inspection door in the plenum base below the appliance to allow an annual inspection of the heat exchangers. The inspection door can be fabricated by the following Figure 7: Furnace Base Openings for Fuel, Electrical and A/C method. Line Penetrations MORTEX PRODUCTS INC 501 TERMINAL RD FORT WORTH, TX 76106 Page 9 ... -
Page 10: Gas Supply And Valve Connections
MORTEX PRODUCTS INC 501 TERMINAL RD FORT WORTH, TX 76106 Page 10 ... -
Page 11: Supply Gas Piping
This can result in a fire or explosion that can result considered. Avoid pipe sizes smaller than 1/2" (1.27 cm). in personnel injury, property damage and loss of life. Table 4 allows for a 0.3" W.C. (0.075 kPa) pressure drop in the MORTEX PRODUCTS INC 501 TERMINAL RD FORT WORTH, TX 76106 Page 11 ... - Page 12 5. Disconnect the brown wires from the gas valve electrical terminals. 6. Remove the two (2) screws that secure the gas valve manifold assembly to the burner mounting plate. 7. Remove the brass gas orifice from the gas valve manifold. MORTEX PRODUCTS INC 501 TERMINAL RD FORT WORTH, TX 76106 Page 12 ...
- Page 13 ONLY. Hand drilling orifices WILL CAUSE misalignment of the burner flame causing the flame to impinge on the heat exchanger resulting in premature heat exchanger failure, dangerously high levels of carbon monoxide, personal injury, property damage and/or death. MORTEX PRODUCTS INC 501 TERMINAL RD FORT WORTH, TX 76106 Page 13 ...
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Page 14: Line And Low Voltage Wiring
Min. Wire Size (AWG) Input Air Temp Blower Size Circuit Protection @ 75 FT One Way 60,000 10 x 8 70,000 10 x 8 77,000 10 x 8 90,000 10 x 8 Table 5 Ratings & Physical Electrical Data MORTEX PRODUCTS INC 501 TERMINAL RD FORT WORTH, TX 76106 Page 14 ... - Page 15 2.54 Table 7: A/C Ready Models; Blower Motor Ratings Model G18D060CA4BA G18D070CA4BA G18D077CA4BA G18D090CA4BA Blower Motor HP Blower Mortor SPD Blower Motor Amps FLA Nominal Air Flow 1,700 1,700 1,700 1,700 24 VAC Current @ 60 HZ 0.49 0.49 0.49 0.49 Total Unit Amps Table 8: A/C Ready Models; Blower and Motor Ratings MORTEX PRODUCTS INC 501 TERMINAL RD FORT WORTH, TX 76106 Page 15 ...
- Page 16 Ground screw hole location is in the small box 0 - 70 Feet 3.0 Amps with the supply voltage wires. 0 - 30 Feet 3.0 Amps Reinstall the control box cover. Table 9: Low Voltage Wire Gauge and Max Lengths MORTEX PRODUCTS INC 501 TERMINAL RD FORT WORTH, TX 76106 Page 16 ...
- Page 17 MORTEX PRODUCTS INC 501 TERMINAL RD FORT WORTH, TX 76106 Page 17 ...
- Page 18 3. Strip ½” of the insulation on the end of each wire. 4. Connect the Red (24 VAC) supply thermostat wire to the Red low voltage pigtail wire and secure with a wire nut. MORTEX PRODUCTS INC 501 TERMINAL RD FORT WORTH, TX 76106 Page 18 ...
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Page 19: Combustion Air And Vent System
The direct venting system must be installed in accordance with to use a Coleman or Nordyne Roof Jack on a Mortex Section 5.3, Air for Combustion and Ventilation, of the National Furnace. -
Page 20: Roof Jack Mounting Collars - Top Of Furnace
Mortex has a 7” Outer Pipe and a 4” Inner Pipe. Using a Coleman or Nordyne Roof Jack on a Mortex Furnace will cause vented combustion products to get drawn Venting into another manufacturers roof jack vent system into the combustion air causing the flame to extinguish... -
Page 21: Roof Jack Crown Assembly
If the roof pitch is greater than 1,000 Btu hr. (0.2928 kW) input rating for all of the appliances 6/12, then the installer will be responsible for providing a installed in that area. suitable field fabricated roof saddle. Refer to Figure 22: MORTEX PRODUCTS INC 501 TERMINAL RD FORT WORTH, TX 76106 Page 21 ... -
Page 22: Estimated Free Area
Table 11, to correctly sized to properly vent the attached estimate free area. appliances. An improperly sized roof jack vent system can cause CARBON MONOXIDE to spill into the living space causing personal injury, and or death. MORTEX PRODUCTS INC 501 TERMINAL RD FORT WORTH, TX 76106 Page 22 ... -
Page 23: Vent Clearances
Vent shall extend high enough above building, or a neighboring obstruction, so that wind from any direction will not create a positive pressure in the vicinity of the vent. Figure 26: Outside Ambient Combustion Air Openings and Ducts MORTEX PRODUCTS INC 501 TERMINAL RD FORT WORTH, TX 76106 Page 23 ... -
Page 24: Home Layout And Vent Clearances
Avoid areas where condensate drainage may cause problems, such as above planters, patios, or adjacent to windows where steam may cause fogging. A terminus of a vent shall be either: Fitted with cap accordance with the vent manufacturer’s Installation Instructions Or in accordance with the Installation Instructions for a special venting system. MORTEX PRODUCTS INC 501 TERMINAL RD FORT WORTH, TX 76106 Page 24 ... -
Page 25: Outside Combustion Air And Vent Safety Check Procedure
National Fuel Gas Code, ANSI improperly causing unsafe levels of Carbon Monoxide or an Z223.1/ NFPA 54 and / or the CSA B149.1, Natural Gas and unsafe condition to occur. Propane Installation Codes, local codes, and the manufacturer's instructions. MORTEX PRODUCTS INC 501 TERMINAL RD FORT WORTH, TX 76106 Page 25 ... -
Page 26: Typical Roof Jack Installation
25" - 51" 3/12 81" - 107" 102.5" - 128.5" 90-RJS3868-AL 38" - 68" 3/12 94" - 124" 115.5" - 145.5" 90-RJS6399-AL 63" - 99" 3/12 119" - 155" 140.5" - 176.5" Table 13: Roof Jack Specifications MORTEX PRODUCTS INC 501 TERMINAL RD FORT WORTH, TX 76106 Page 26 ... -
Page 27: Furnace Startup, Diagnostics And Sequence Of Operation
0-15 in-wc. (0-3.735 kPa) to measure the line If the sensor does not sense a flame the blower will not pressure and the manifold pressure. start. 3. A 3/32” (2.4 mm) alien wrench to open and close the gas MORTEX PRODUCTS INC 501 TERMINAL RD FORT WORTH, TX 76106 Page 27 ... -
Page 28: Input Calculations For A Cu-Ft Gas Meter
9. Follow the procedure to “shut off the furnace” located in the Users Information Manual. MORTEX PRODUCTS INC 501 TERMINAL RD FORT WORTH, TX 76106 Page 28 ... -
Page 29: Reading The Inlet (Supply) Gas Pressure (Inp)
(air entering the furnace) and the supply air (air located in the Users Information Manual. leaving the furnace). The supply air temperature can be taken Turn the switch on the gas valve to the “OFF” position. MORTEX PRODUCTS INC 501 TERMINAL RD FORT WORTH, TX 76106 Page 29 ... -
Page 30: Integrated Control Board
R = 24 VAC supply connection to the R on the thermostat Y = 24 VAC from the Y terminal on the thermostat NEUTRALS = 120 VAC Neutrals terminal connections the transformer, blower motor and the incoming neutral wire are MORTEX PRODUCTS INC 501 TERMINAL RD FORT WORTH, TX 76106 Page 30 ... - Page 31 6 minutes, and the control will be for an inter-purge period of 25 seconds. The ignitor is then re- locked out, until the thermostat is reset, or power is removed. MORTEX PRODUCTS INC 501 TERMINAL RD FORT WORTH, TX 76106 Page 31 ...
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Page 32: Blower Performance
1094 1026 G18DxxxCA3BA ‐ 10 x 8 WHEEL 1/3 HP 5 SPD CONSTANT TORQUE MOTOR Configuration SPD Tap CFM ‐ NO COIL 1134 1078 1007 1286 1217 1157 1094 1026 G18DxxxCA4BA ‐ 10 x 8 WHEEL 3/4 HP 5 SPD CONSTANT TORQUE MOTOR Configuration SPD Tap 1114 CFM ‐ NO COIL 1405 1308 1201 1087 1697 1599 1486 1378 1255 1829 1739 1648 1552 1467 Table 17: Blower Performance MORTEX PRODUCTS INC 501 TERMINAL RD FORT WORTH, TX 76106 Page 32 ... - Page 33 6. Motors have internal over-temperature protection. WIRING DIAGRAM 61CC0654A Figure 33: Wiring Diagram A/C Ready Models NOTE: IF ANY OF THE ORIGINAL WIRE SUPPLIED WITH THIS UNIT MUST BE REPLACED. IT MUST BE REPLACED WITH TYPE 105°C THERMOPLASTIC OR its EQUIVALENT. MORTEX PRODUCTS INC 501 TERMINAL RD FORT WORTH, TX 76106 Page 33 ...
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Page 34: Wiring Diagram Heating Only
NOTE: IF ANY OF THE ORIGINAL WIRE SUPPLIED WITH THIS UNIT MUST BE REPLACED. IT MUST BE REPLACED WITH TYPE 105°C THERMOPLASTIC OR its EQUIVALENT. Subject to change without notice 61GF0077 Copyright by Mortex Products Inc. 2019 Supersedes: Revision 61GF0100B MORTEX PRODUCTS INC 501 TERMINAL RD FORT WORTH, TX 76106 ...
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