INSTALLATION MANUAL

RESIDENTIAL GAS FURNACE WITH PSC MOTOR

MODELS:

TM8M/TMLM*MP, YM8M/YMLM*MP, CM8M/CMLM*MP, LM8M/LMLM*MP

(80% Modulating Multi-position / Low NOx)

EFFICIENCY

RATING

CERTIFIED

ISO 9001

Certified Quality

Management System

LIST OF SECTIONS

SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 DUCTWORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 GAS PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 ELECTRICAL POWER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 TWINNING AND STAGING . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 VENT SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

START-UP AND ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . 20 SAFETY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 NORMAL OPERATION AND DIAGNOSTICS . . . . . . . . . . . . . 25 REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . 27 REPLACEMENT PART CONTACT INFORMATION . . . . . . . . 27 WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

LIST OF FIGURES

Duct Attachment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Vertical Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Coil Flange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Horizontal Right Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Horizontal Left Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 PC Series Upflow Coil Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Horizontal Left or Right application (Right Shown) . . . . . . . . . . . . . . 8 Combustible Floor Base Accessory . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Horizontal Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Typical Attic Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Typical Suspended Furnace / Crawl Space Installation . . . . . . . . . . . 9 Downflow Venting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Downflow Installation - Gas Valve Rotation . . . . . . . . . . . . . . . . . . . . 9 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Side Return Cutout Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Gas Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Upflow/Downflow Gas Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Horizontal Gas Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Electrical Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Thermostat Chart - Single Stage Air Conditioner –

Variable Speed or PSC Modulating Furnace . . . . . . . . . . . . . . . . . . 14 Thermostat Chart - Two Stage Air Conditioner –

Variable Speed or PSC Modulating Furnace . . . . . . . . . . . . . . . . . . 15 Thermostat Chart - Two Stage Air Conditioner with Single Stage Thermostat – Variable Speed or PSC Modulating Furnace . . . . . . . 16 Thermostat Chart - Single Stage Heat Pump –

Variable Speed or PSC Modulating Furnace . . . . . . . . . . . . . . . . . . 17 Thermostat Chart - Single Stage Heat Pump –

Variable Speed or PSC Modulating Furnace . . . . . . . . . . . . . . . . . . 18 Thermostat Chart - Two Stage Heat Pump –

Variable Speed or PSC Modulating Furnace . . . . . . . . . . . . . . . . . . 19 Combustion Air Inducer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Combustion Airflow Path Through The Furnace

Casing to the Burner Compartment . . . . . . . . . . . . . . . . . . . . . . . . . 20 Outside and Ambient Combustion Air . . . . . . . . . . . . . . . . . . . . . . . . 21 Gas Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Furnace Control Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

LIST OF TABLES

Unit Clearances to Combustibles

. . . . . 4

Unconfined Space Minimum Area in Square Inch

. .

19

Coil Projection Dimensions - PC Series Coils

. . . . . 6

Free Area

19

Cabinet and Duct Dimensions

. . . . . 8

Gas Rate (CU FT/HR) at Full Input

22

Recommended Filter Sizes (High Velocity 600 FPM)

. . . . . 8

Inlet Gas Pressure Range

23

High Altitude Orifices

. . . . 10

Nominal Manifold Pressure

23

Ratings & Physical / Electrical Data

. . . . 10

Cooling Airflow - A/C Capacity in Tons

24

Estimated Free Area

. . . . 19

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

These high efficiency, compact units employ induced combustion, reli-

DANGER indicates an imminently hazardous situation, which, if not

able hot surface ignition and high heat transfer aluminized tubular heat

avoided, will result in death or serious injury.

 

 

exchangers. The units are factory shipped for installation in upflow or

WARNING indicates a potentially hazardous situation, which, if

not

horizontal applications and may be converted for downflow applica-

avoided, could result in death or serious injury.

 

 

tions.

 

CAUTION indicates a potentially hazardous situation, which,

if

not

These furnaces are designed for residential installation in a basement,

avoided may result in minor or moderate injury. It is also used to

closet, alcove, attic, recreation room or garage and are also ideal for

alert against unsafe practices and hazards involving only property dam-

commercial applications. All units are factory assembled, wired and

age.

 

 

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.

 

 

 

 

 

 

 

Improper installation may create a condition where the operation of

 

 

 

 

SECTION I: SAFETY

 

the product could cause personal injury or property damage.

 

 

 

Improper installation, adjustment, alteration, service or mainte-

 

 

This is a safety alert symbol. When you see this symbol on

nance can cause injury or property damage. Failure to carefully

 

 

 

 

labels or in manuals, be alert to the potential for

personal

read and follow all instructions in this manual can result in fur-

 

 

injury.

 

nace malfunction, death, personal injury and/or property dam-

 

 

 

 

 

 

 

 

 

age. Only a qualified contractor, installer or service agency should

Understand and pay particular attention to the signal words DANGER,

install this product.

 

 

WARNING, or CAUTION.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

368261-UIM-A-0508

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Johnson Controls TM8M/TMLM*MP, YM8M/YMLM*MP installation manual Models, List of Sections, List of Figures, List of Tables
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LM8M/LMLM*MP, TM8M/TMLM*MP, CM8M/CMLM*MP, YM8M/YMLM*MP specifications

Johnson Controls TM8M/TMLM*MP, YM8M/YMLM*MP, LM8M/LMLM*MP, and CM8M/CMLM*MP are advanced temperature controllers designed for a wide range of applications in heating, ventilation, and air conditioning (HVAC) systems. These models stand out due to their robust features, cutting-edge technologies, and specific characteristics that cater to both residential and commercial environments.

One of the main features of the TM8M/TMLM*MP series is its user-friendly interface that incorporates a large, easy-to-read display. This allows for quick adjustments and monitoring of temperature settings, making it accessible for both skilled technicians and everyday users. The intuitive design ensures that users can efficiently navigate through various settings and configurations.

Another notable characteristic is the flexibility of these controllers. The series supports multiple sensor configurations, enabling the integration of both wired and wireless sensors. This adaptability allows users to customize their climate control systems according to specific needs and room layouts, ultimately enhancing comfort and energy efficiency.

The TM8M/TMLM*MP and its counterparts are equipped with sophisticated algorithms that optimize energy consumption. By utilizing predictive maintenance and intelligent analytics, these controllers can adjust settings dynamically based on real-time data. This not only helps in reducing operational costs but also prolongs the lifespan of HVAC equipment.

Incorporating advanced communication protocols is a hallmark of the Johnson Controls series. The TM8M and CM8M models support modern systems such as BACnet and Modbus, allowing seamless integration with building management systems (BMS). This compatibility ensures that users can maintain centralized control over multiple systems, enhancing overall operational efficiency.

Additionally, the series is robustly constructed to withstand harsh environmental conditions. Its durable casing and reliable components ensure long-term performance, making it suitable for a variety of settings, including industrial facilities and commercial properties.

Safety features are also integral to the design of the TM8M/TMLM*MP and related models. Built-in safeguards protect against over-temperature and other potential hazards, ensuring reliability and peace of mind for operators.

In summary, Johnson Controls TM8M/TMLM*MP, YM8M/YMLM*MP, LM8M/LMLM*MP, and CM8M/CMLM*MP controllers represent a convergence of user-friendly design, advanced technology, flexibility, and safety. Their ability to adapt to diverse applications while optimizing energy use makes them a critical component in modern HVAC systems, ensuring comfort and efficiency in every environment.
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