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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
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-D-0910
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Table of Contents
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 calculation for the structure. ACCA, Manual J or other approved tions in the manuals and on the labels attached to the unit and methods may be used. other safety precautions that may apply. 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
This access cover shall be attached in such a manner as to prevent leaks. Johnson Controls Unitary Products... -
Page 6: Coil Flange
PC24 4-1/2 PC30, PC32, PC35 4-1/2 Mounting Plate PC42, PC43, PC36, PC37 5-1/2 PC48 6-1/2 PC60 Furnace Dimension “C” should be at least 2/3 of dimension “D”. See Figure 6 FIGURE 4: Horizontal Right Application Johnson Controls Unitary Products... -
Page 7: Horizontal Left Or Right Application (Right Shown)
18” (45.7 cm) 12” Openings is COMBUSTIBLE FLOOR from the Recommended BASE ACCESSORY furnace 12” 30” MIN. Work Area FIGURE 8: Combustible Floor Base Accessory Return Sediment Trap FIGURE 10: Typical Attic Installation Johnson Controls Unitary Products... - Page 8 Place one support at the supply end of the furnace, bend of the heat exchangers as lifting points as the tubes may shift out one support located approximately in the center of the furnace near the of position or their location brackets/baffles. Johnson Controls Unitary Products...
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Page 9: Filters
CFM greater than 1800, you may use two side returns or one side and the cut the opening larger than the dimensions shown in Figure 12. 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 The transformer may provide power for an panel. After making the wiring connections replace the wiring box air conditioning unit contactor. cover and screws. Refer to Figure 16. Johnson Controls Unitary Products...
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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 17: Thermostat Chart - Single Stage AC with Single Stage Furnaces Johnson Controls Unitary Products... -
Page 14: Thermostat Chart - Single Stage Hp With Single Stage Furnaces
115VAC (1.0 Amp maximum) during circulating blower opera- tion. These furnaces are not to be twinned. If more than one furnace is needed in an application, each furnace must have its own complete duct system and its own wall thermostat. Johnson Controls Unitary Products... -
Page 15: Vent System
(0.2928 kW) input rating for all of the appliances installed in that authority having jurisdiction. Venting into an unlined masonry chimney area. or concrete chimney is prohibited. Johnson Controls Unitary Products... - Page 16 The duct shall terminate within 12” (30.5 cm) above, and within 24” permanent openings, shall communicate directly or by means of (61 cm) horizontally from, the burner level of the appliance having ducts with the outdoors, crawl spaces or attic spaces. the largest input. Johnson Controls Unitary Products...
- Page 17 Be sure proper ventilation is available to dilute and carry away any vented gas. All electrical connections made in the field and in the factory should be checked for proper tightness. Johnson Controls Unitary Products...
- Page 18 Set the thermostat above room temperature to call for heat. System start-up will occur as follows: The induced draft blower motor will start and come up to speed. Shortly after inducer start-up, the hot surface igniter will glow for about 17 seconds. Johnson Controls Unitary Products...
- Page 19 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...
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Page 20: Nominal Manifold Pressure
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: Furnace Control Board
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
COOL speed when Y1 is energized and on HI COOL speed when Y1 Do not try to repair controls. Replace defective controls with UPG and Y2 are energized. Source 1 Parts. Never adjust pressure switch to allow furnace operation. Johnson Controls Unitary Products... - Page 25 The furnace will lock out for one hour and for more than five seconds. The LED will flash three green flashes when then restart. the memory has been cleared, then will resume the normal slow green flash after a five-second pause. Johnson Controls Unitary Products...
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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-D-0910 SECTION X: WIRING DIAGRAM FIGURE 25: Wiring Diagram Johnson Controls Unitary Products... - Page 28 NOTES Subject to change without notice. Published in U.S.A. 437642-UIM-D-0910 Copyright © 2010 by Johnson Controls, Inc. All rights reserved. Supersedes: 437642-UIM-C-0210 Johnson Controls Unitary Products 5005 York Drive Norman, OK 73069...