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INSTALLATION MANUAL
RESIDENTIAL GAS FURNACE MODELS
TM8X*MP, TMLX*MP
(Single Stage Multi-position / Low NOx with
High-Efficiency Motors)
SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
DUCTWORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
GAS PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
ELECTRICAL POWER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
VENT SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Duct Attachment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Vertical Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Coil Flange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Horizontal Right Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Horizontal Left Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
PC Series Upflow Coil Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Horizontal Left or Right application (Right Shown) . . . . . . . . . . . . . . 7
Combustible Floor Base Accessory . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Horizontal Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Typical Attic Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Typical Suspended Furnace / Crawl Space Installation . . . . . . . . . . . 8
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Side Return Cutout Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Gas Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Unit Clearances to Combustibles . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Coil Projection Dimensions - PC Series Coils . . . . . . . . . . . . . . . . . . 7
Cabinet and Duct Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Recommended Filter Sizes (High Velocity 600 FPM) . . . . . . . . . . . . 9
Nominal Manifold Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Ratings & Physical / Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . 11
Estimated Free Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Unconfined Space Minimum Area . . . . . . . . . . . . . . . . . . . . . . . . . . 16
These high efficiency, compact units employ induced combustion, reli-
able hot surface ignition and high heat transfer aluminized tubular heat
exchangers. The units are factory shipped for installation in upflow or
horizontal applications and may be converted for downflow applica-
tions.
These furnaces are designed for residential installation in a basement,
closet, alcove, attic, recreation room or garage and are also ideal for
commercial applications. All units are factory assembled, wired and
tested to assure safe dependable and economical installation and oper-
ation.
These units are Category I listed and may be common vented with
another gas appliance as allowed by the National Fuel Gas Code.
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.
LIST OF SECTIONS
START-UP AND ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . 17
SAFETY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
REPLACEMENT PART CONTACT INFORMATION . . . . . . . . . . . . 26
WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
LIST OF FIGURES
Gas Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Electrical Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Combustion Air Inducer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Single Stage Furnaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Single Stage Furnaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Combustion Airflow Path Through The
Furnace Casing to the Burner Compartment . . . . . . . . . . . . . . . . . . 15
Outside and Ambient Combustion Air . . . . . . . . . . . . . . . . . . . . . . . . 16
Gas Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Reading Gas Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Furnace Control Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
LIST OF TABLES
Free Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Gas Rate (CU FT/HR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Inlet Gas Pressure Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Nominal Manifold Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
(without filter) - Bottom Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
(without filter) - Left Side Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
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 only property dam-
age.
Improper installation may create a condition where the operation of
the product could cause personal injury or property damage.
Improper installation, adjustment, alteration, service or mainte-
nance can cause injury or property damage. Failure to carefully
read and follow all instructions in this manual can result in fur-
nace malfunction, death, personal injury and/or property dam-
age. Only a qualified contractor, installer or service agency should
install this product.
EFFICIENCY
RATING
CERTIFIED
ISO 9001
Certified Quality
Management System
437642-UIM-C-0210
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Related Manuals for Johnson Controls TM8X*MP Series
Summary of Contents for Johnson Controls TM8X*MP Series
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Page 1: Table Of Contents
INSTALLATION MANUAL RESIDENTIAL GAS FURNACE MODELS TM8X*MP, TMLX*MP EFFICIENCY RATING CERTIFIED (Single Stage Multi-position / Low NOx with ISO 9001 Certified Quality High-Efficiency Motors) Management System LIST OF SECTIONS SAFETY ..........1 START-UP AND ADJUSTMENTS . - Page 2 11. The size of the unit should be based on an acceptable heat loss tions in the manuals and on the labels attached to the unit and calculation for the structure. ACCA, Manual J or other approved other safety precautions that may apply. methods may be used. Johnson Controls Unitary Products...
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Page 3: Safety
In some instances these instructions exceed certain local codes and ordinances, especially those who have not kept up with changing residential and non-HUD modular home construction practices. These instructions are required as a minimum for a safe installation. Johnson Controls Unitary Products... - Page 4 1. Special floor base or air conditioning coil required for use on combustible floor. 2. Line contact only permitted between lines formed by the intersection of the rear panel and side panel (top in horizontal position) of the furnace jacket and building joists, studs or framing. Johnson Controls Unitary Products...
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Page 5: Ductwork
Attach the air conditioning coil cabinet to the duct connector, and then position the furnace on top of the coil cabinet. The connection to the fur- nace, air conditioning coil cabinet, duct connector, and supply air duct must be sealed to prevent air leakage. Johnson Controls Unitary Products... -
Page 6: Coil Flange
See Figure 6 FACTORY FLANGE LOCATION (Used for upflow or horizontal right installations) ALTERNATE FLANGE LOCATION (Used for downflow or horizontal left installations) FIGURE 3: Coil Flange Johnson Controls Unitary Products... -
Page 7: Pc Series Upflow Coil Installation
FIGURE 9: Horizontal Application Gas Furnace This furnace may be installed in a horizontal position on either side as shown above. It must not be installed on its back. FIGURE 7: Horizontal Left or Right application (Right Shown) Johnson Controls Unitary Products... -
Page 8: Typical Attic Installation
Do not use the top return bend of the heat exchangers as lifting points as the tubes may shift out of position or their location brackets/baffles. Johnson Controls Unitary Products... -
Page 9: Filters
Figure 12. CFM greater than 1800, you may use two side returns or one side and the bottom or one return with a transition to allow use of a 20x25 filter. Johnson Controls Unitary Products... -
Page 10: Gas Piping
1/2 psig (3.5 kPa). Gas piping may be connected from either side of the furnace using any of the gas pipe entry on both sides of the furnace. Refer to Figure 12. Johnson Controls Unitary Products... -
Page 11: Electrical Power
Annual Fuel Utilization Efficiency (AFUE) numbers are determined in accordance with DOE Test procedures. Wire size and over current protection must comply with the National Electrical Code (NFPA-70-latest edition) and all local codes. The furnace shall be installed so that the electrical components are protected from water. Johnson Controls Unitary Products... -
Page 12: Vent System
FIGURE 17: Combustion Air Inducer Set the heat anticipator in the room thermostat to 0.4 amps. Setting it lower will cause short cycles. Setting it higher will cause the room temperature to exceed the set points. Johnson Controls Unitary Products... -
Page 13: Thermostat Chart - Single Stage Ac With Single Stage Furnaces
24 – Volt Hot (Cool XFMR) Full Stage Heat 24VAC Humidifier (Optional) Humidistat Clipping Jumper W914 for electric heat on thermostat is not necessary FIGURE 18: Thermostat Chart - Single Stage AC with Single Stage Furnaces Johnson Controls Unitary Products... -
Page 14: Thermostat Chart - Single Stage Hp With Single Stage Furnaces
Step 9 of Thermostat Installer / Configuration Menu must be set to Pump OFF Part Numbers: Part Number: SAP = Legacy S1-2HU16700124 67297 = 031-01975 FIGURE 19: Thermostat Chart - Single Stage HP with Single Stage Furnaces Johnson Controls Unitary Products... -
Page 15: Estimated Free Area
Combustion air is brought into the furnace through the unit top panel opening. Johnson Controls Unitary Products... -
Page 16: Unconfined Space Minimum Area
1” (2.54 cm) from the sides and back and 6” Vent connectors serving Category I furnaces shall not be connected (15.24 cm) from the front of the appliance. The opening shall com- into any portion of mechanical draft systems operating under positive pressure. Johnson Controls Unitary Products... -
Page 17: Gas Piping
Use the wrench boss on the gas valve when removing or ual air in the gas line or until gas manifold pressure is adjusted. The installing the piping. ignition control will make three attempts to light before locking out. Johnson Controls Unitary Products... - Page 18 Repeat replace the component. steps 2 - 5 until correct input is achieved. Be sure to relight any gas appliances that were turned off at the start of this input check. Johnson Controls Unitary Products...
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Page 19: Gas Rate (Cu Ft/Hr)
Size of Test Dial Seconds For Seconds For 1 Revolution 1 Revolution 1 Cu Ft 2 Cu Ft 5 Cu Ft 1 Cu Ft 2 Cu Ft 5 Cu Ft 1800 1636 1500 1385 1286 1200 1125 1059 1000 Johnson Controls Unitary Products... -
Page 20: Gas Valve
Refer to Figure 23 for connection details. in operation, check for gas leakage around the gas valve pressure port for leakage using an approved non-corrosive gas leak detec- tion fluid, or other non-flammable leak detection methods. Johnson Controls Unitary Products... -
Page 21: Reading Gas Pressure
Carbon Monoxide, a fire hazard, personal injury, property damage, and/or death. DIAGNOSTIC ERROR CODE RETRIEVAL BUTTON BLOWER OFF DELAY JUMPER ELECTRONIC AIR CLEANER TERMINAL CONTINUOUS FAN SPEED JUMPER HUMIDIFIER TERMINAL FIGURE 24: Furnace Control Board Johnson Controls Unitary Products... -
Page 22: Blower Performance Cfm - Any Position (Without Filter) - Bottom Return
1805 1791 1738 1725 1675 1623 1567 1487 1394 1256 1425 1427 1403 1335 1324 1280 1236 1176 1103 NOTES: 1. Airflow expressed in standard cubic feet per minute (CFM). 2. Motor voltage at 115 V. Johnson Controls Unitary Products... -
Page 23: Blower Performance Cfm - Any Position (Without Filter) - Left Side Return
1. Airflow expressed in standard cubic feet per minute (CFM). 2. Return air is through side opposite motor (left side). 3. Motor voltage at 115 V. 4. Airflow through across motor side (right side) may be slightly less than the data shown above. Johnson Controls Unitary Products... -
Page 24: Safety Controls
“FAN SPEED” jumper on the main control board. other means). There may be a potential shock hazard from the components of the hot surface ignition system. The furnace can only be lit automatically by its hot surface ignition system. Johnson Controls Unitary Products... -
Page 25: Troubleshooting
1 RED FLASH: This indicates that flame was sensed when there was not a call for heat. The control will turn on both the inducer motor and supply air blower. A gas valve that leaks or is slow closing would typi- cally cause this fault. Johnson Controls Unitary Products... -
Page 26: Replacement Parts List
3. Customer Service contact information. a. Click on the “Brand Links” button b. Click on the “Customer Service” button • You can contact us by mail. Just send a written request to: Johnson Controls Unitary Products Consumer Relations 5005 York Drive Norman, OK 73069... -
Page 27: Wiring Diagram
437642-UIM-C-0210 SECTION X: WIRING DIAGRAM FIGURE 25: Wiring Diagram Johnson Controls Unitary Products... - Page 28 Subject to change without notice. Published in U.S.A. 437642-UIM-C-0210 Copyright © 2010 by Johnson Controls, Inc. All rights reserved. Supersedes: 437642-UIM-B-0109 Johnson Controls Unitary Products 5005 York Drive Norman, OK 73069...