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INSTALLATION MANUAL
TWO STAGE STANDARD ECM
RESIDENTIAL GAS FURNACE
MODELS: TM8Y
80% AFUE Multi-position / Low NOx
SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
DUCTWORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
GAS PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
ELECTRICAL POWER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
TWINNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
VENTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Duct Attachment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Vertical Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Coil Flange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Horizontal Right Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Horizontal Left Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
PC Series Upflow Coil Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Combustible Floor Base Accessory . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Horizontal Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Typical Attic Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Typical Suspended Furnace / Crawl Space Installation . . . . . . . . . . . 8
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Side Return Cutout Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Gas Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Gas Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
DUCTWORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Coil Projection Dimensions - PC Series Coils . . . . . . . . . . . . . . . . . . 6
Cabinet and Duct Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Recommended Filter Sizes (High Velocity 600 FPM) . . . . . . . . . . . . 9
GAS PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Nominal Manifold Pressure - High Fire . . . . . . . . . . . . . . . . . . . . . . 11
Nominal Manifold Pressure - Low Fire . . . . . . . . . . . . . . . . . . . . . . . 11
ELECTRICAL POWER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Ratings & Physical / Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . 12
TWINNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
VENTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
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.
LIST OF SECTIONS
START-UP AND ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . 18
SAFETY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
REPLACEMENT PART CONTACT INFORMATION . . . . . . . . . . . . 26
WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
START UP SHEET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
LIST OF FIGURES
Electrical Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Two Stage Standard ECM Furnaces . . . . . . . . . . . . . . . . . . . . . . . . 13
Two Stage Standard ECM Furnace . . . . . . . . . . . . . . . . . . . . . . . . . 14
Combustion Air Inducer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
the Burner Compartment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Outside and Ambient Combustion Air . . . . . . . . . . . . . . . . . . . . . . . . 17
Gas Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Reading Gas Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Furnace Control Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Measuring External Duct Static . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
LIST OF TABLES
Estimated Free Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Unconfined Space Minimum Area . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Free Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
START-UP AND ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Gas Rate (CU FT/HR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Inlet Gas Pressure Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Nominal Manifold Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Blower Performance CFM - Any Position (without filter) . . . . . . . . . . 23
SAFETY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
REPLACEMENT PART CONTACT INFORMATION . . . . . . . . . . . . 26
WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
START UP SHEET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
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.
5052632-UIM-D-0217
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Table of Contents
Related Manuals for Johnson Controls Unitary Products TM8Y
Summary of Contents for Johnson Controls Unitary Products TM8Y
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Page 1: Table Of Contents
INSTALLATION MANUAL TWO STAGE STANDARD ECM RESIDENTIAL GAS FURNACE MODELS: TM8Y 80% AFUE Multi-position / Low NOx LIST OF SECTIONS SAFETY ..........1 START-UP AND ADJUSTMENTS . - Page 2 • Clean furnace, duct work and components upon substantial completion of the construction process, and verify furnace- operating conditions including ignition, input rate, temperature rise and venting, according to the manufacturer’s instructions. 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: Unit Clearances To Combustibles (All Dimensions In Inches, And All Surfaces Identified With The Unit In An Upflow Configuration)
1. Combustion floor base accessory 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... -
Page 5: Ductwork
This access cover shall be attached in such a man- ner as to prevent leaks. Johnson Controls Unitary Products... -
Page 6: Vertical Applications
PC42, PC43, PC36, PC37 5-1/2 izontal applications with the horizontal drain pan side down. PC48 6-1/2 Mounting Plate PC60 Dimension “C” should be at least 2/3 of dimension “D”. See Figure 6. Furnace FIGURE 4: Horizontal Right Application Johnson Controls Unitary Products... -
Page 7: Combustible Floor Base Accessory
The combustion air blower must be rotated 90° as shown in Figure bend of the heat exchangers as lifting points as the tubes may shift out 18. DO NOT BLOCK COMBUSTION AIR INLET OPENINGS. of position or their location brackets/baffles. Johnson Controls Unitary Products... -
Page 8: Typical Suspended Furnace / Crawl Space Installation
Gas Pipe Gas Pipe Entry 33” Entry 23” Thermostat Thermostat Wiring Wiring 14” 28.5” 1” 1.5” 29.5” 4” Diameter Vent Connection .5” .5” 24.38” Outlet .5” .5” 20” 24.25” SUPPLY END RETURN END FIGURE 11: Dimensions Johnson Controls Unitary Products... -
Page 9: Filters
Locate the “L” shaped corner locator's. These indicate the size of the cutout to be made in the furnace side panel. Refer to Figure 12. Front of Furnace Side of Furnace Corner Markings FIGURE 12: Side Return Cutout Markings Johnson Controls Unitary Products... -
Page 10: Gas Piping
An accessible manual shutoff valve must be installed upstream of the of the gas pipe entry on both sides of the furnace. Refer to Figure 14. furnace gas controls and within 6 feet (1.8 m) of the furnace. Johnson Controls Unitary Products... -
Page 11: Electrical Power
63°F (35°C) rise wire when installed in accordance with instructions. Refer to Table 7 in these instructions for specific furnace electrical data. The residential supply must have a bonded neutral. Johnson Controls Unitary Products... -
Page 12: Ratings & Physical / Electrical Data
The transformer may provide power for an using a protective bushing where the wires pass through the fur- air conditioning unit contactor. nace panel. After making the wiring connections replace the wiring box cover and screws. Refer to Figure 15. Johnson Controls Unitary Products... -
Page 13: Thermostat Chart - Two Stage Ac With Two Stage Standard Ecm Furnaces
5052632-UIM-D-0217 For additional connection diagrams for all Johnson Controls Unitary Products’ equipment refer to “Low Voltage System Wiring” document available on-line at www.upgnet.com in the Product Catalog Section. Two Stage Air Conditioner - Two Stage Furnace TWO STAGE TWO STAGE... -
Page 14: Thermostat Chart - Two Stage Hp With Two Stage Standard Ecm Furnace
If using a heat pump an external fossil fuel kit must be used, If heat pump doesn’t have Yorkguard VI control. A0421-001 FIGURE 17: Thermostat Chart - Two Stage HP with Two Stage Standard ECM Furnace Johnson Controls Unitary Products... -
Page 15: Twinning
Type B vent must be used, or masonry chimney vent kit 1CK0603 or 1CK0604 must be used. Refer to the instructions with the kit to properly apply these masonry chimney kits. Johnson Controls Unitary Products... -
Page 16: Combustion Airflow Path Through The Furnace Casing To The Burner Compartment
+ 30,000 = (130,000 2,000) = 65 Sq. In. Horizontal 100,000 Btu/hr (0.2928 kW) input rating for all of the appliances installed in that area. The following must be considered to obtain proper air for combus- tion and ventilation in confined spaces. Johnson Controls Unitary Products... -
Page 17: Outside And Ambient Combustion Air
1 square in per 3000 Btu per hour (7.3 cm per kW) of the total input rating of all equipment located in the enclosure. Not less than the sum of all vent connectors in the confined space. Johnson Controls Unitary Products... -
Page 18: Start-Up And Adjustments
With the burner assembly out of the way, simply slide the NOx screens out of the heat exchanger tubes and discard the screens. Replace all components in reverse order. Reconnect all wiring. Johnson Controls Unitary Products... - Page 19 Burner ignition may not be satisfactory on first startup due to residual air in the gas line or until gas manifold pressure is adjusted. The igni- tion control will make 3 attempts to light before locking out. Johnson Controls Unitary Products...
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Page 20: 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 21: Gas Valve
Loosening or tightening the cap does in operation, check for gas leakage around the gas valve pressure not adjust the flow of gas. 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 22: Reading Gas Pressure
This control will change other mature heat exchanger failure, high levels of Carbon Monoxide, a fire blower speeds on 24V thermostat inputs (Y1, Y/Y2, W). hazard, personal injury, property damage, and/or death. FIGURE 23: Furnace Control Board Johnson Controls Unitary Products... -
Page 23: Measuring External Duct Static
• Measure the return air static pressure • Record this negative number • Treat the negative number as a positive and add the two numbers together • This is total system static Return Duct FIGURE 24: Measuring External Duct Static Johnson Controls Unitary Products... -
Page 24: Safety Controls
Never adjust pressure switch to allow furnace operation. LO COOL cooling terminal on the control board depending on 24V ther- mostat input on the Y1 or Y/Y2. The fan off setting is fixed at 60 sec- onds to improve cooling efficiency. Johnson Controls Unitary Products... - Page 25 Red Flashes” below. 0.16 microamps DC (μa) If the main limit switch opens five times within a single call for heat, the control will indicate 4 Red Flashes and will enter a one-hour soft lock- out. 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
221 degrés F (105 degrés C ). 2. Les connexions à grande vitesse du moteur du ventilateur indiqués sont typiques, mais peuvent varier selon le modèle et par application. 5111808-UWD-C-0117 FIGURE 25: Wiring Diagram Johnson Controls Unitary Products... - Page 28 5052632-UIM-D-0217 NOTES Johnson Controls Unitary Products...
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Page 29: Start Up Sheet
Thermostat heat anticipator set to .4 (6 cycle per hour for electronic thermostats ) Low voltage value between "R" and "C" on furnace control board (volts AC) Thermostat: Thermostat Staging: 10 MIN AUTO 20 MIN Continued on next Page Johnson Controls Unitary Products... - Page 30 Gas Side Gas Type Natural Gas LP Gas (Requires LP conversion kit) LP Gas Conversion Kit Part # Used LP Conversion Kit Installed By Inlet Gas Pressure (in. w.c.") Low Fire Manifold Gas Pressure (in. w.c.") High Fire Manifold Gas Pressure (in. w.c.") Calculated input in btuh - clock the gas meter in high fire (Nat Gas Only) Burner flame inspected -- flames are blue and extending directly into the primary heat exchanger cells Air Side: System External Static Pressure...
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