Johnson Controls TM9V*MP Section IX Safety Controls, Section X Normal Operation and Diagnostics

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701379-UIM-C-0712

SECTION IX: SAFETY CONTROLS

CONTROL CIRCUIT FUSE

A 3-amp fuse is provided on the control circuit board to protect the 24- volt transformer from overload caused by control circuit wiring errors. This is an ATO 3, automotive type fuse and is located on the control board.

BLOWER DOOR SAFETY SWITCH

Main power to the unit must still be interrupted at the main power dis- connect switch before any service or repair work is to be done to the unit. Do not rely upon the interlock switch as a main power discon- nect.

Blower and burner must never be operated without the blower panel in place.

This unit is equipped with an electrical interlock switch mounted in the burner compartment. This switch interrupts all power at the unit when the panel covering the blower compartment is removed.

Electrical supply to this unit is dependent upon the panel that covers the blower compartment being in place and properly positioned.

ROLLOUT SWITCH CONTROLS

These controls are mounted on the burner assembly. If the temperature in the area surrounding burner exceeds its set point, the gas valve is de-energized. The operation of this control indicates a malfunction in the combustion air blower, heat exchanger or a blocked vent pipe con- nection. Corrective action is required. These are manual reset controls that must be reset before operation can continue.

PRESSURE SWITCHES

This furnace is supplied with three pressure switches, which monitor the flow through the combustion air/vent piping and condensate drain sys- tem. These switches de-energize the gas valve if any of the following conditions are present. Refer to SECTION VI, "CONDENSATE PIPING AND FURNACE VENTING CONFIGURATION" for tubing connections.

1.Blockage of vent piping or terminal.

2.Failure of combustion air blower motor.

3.Blockage of combustion air piping or terminals.

4.Blockage of condensate drain piping.

LIMIT CONTROLS

There is a high temperature limit control located on the furnace vesti- bule panel near the gas valve. This is an automatic reset control that provides over temperature protection due to reduced airflow. This may be caused by:

1.A dirty filter.

2.If the indoor fan motor should fail.

3.Too many supply or return registers closed or blocked off.

The control module will lockout if the limit trips 5 consecutive times. If this occurs, control will reset & try ignition again after 1 hour.

SECTION X: NORMAL OPERATION AND DIAGNOSTICS

NORMAL OPERATION SEQUENCE

Heating and Cooling Airflow

The heating and the cooling airflows are preset at the factory. The heat- ing airflow is set to the maximum CFM. The cooling airflow is set to pro- vide 90 percent of the maximum CFM. The heating and cooling airflows must be field adjusted to match the HVAC system at installation. See Table 18 for the HEAT, COOL and ADJ jumper settings to use for spe- cific airflows.

CFM Board - Delay Taps Selection

The set of jumper pins on the control board labeled DELAY are used to set the delay profiles for the furnace. These can be chosen so as to maximize the comfort and sound levels for various regions of the coun- try.

Tap A is the default profile. It provides a 30-second ramp-up from zero airflow to full capacity and a 30-second ramp-down from full capacity back to zero airflow. Whenever there is a change in airflow mode, such as from low heat to high heat, the motor will take 30 seconds to ramp from one speed to the other.

Tap B is the humid profile. This profile is best-suited for installations where the humidity is frequently very high during cooling season, such as in the southern part of the country. On a call for cooling, the blower will ramp up to 50% of full capacity and will stay there for two minutes, then will ramp up to 82% of full capacity and will stay there for five min- utes, and then will ramp up to full capacity, where it will stay until the wall thermostat is satisfied. In every case, it will take the motor 30 sec- onds to ramp from one speed to another.

Tap C is the dry profile. This profile is best suited to parts of the country where excessive humidity is not generally a problem, where the sum- mer months are usually dry. On a call for cooling the motor will ramp up to full capacity and will stay there until the thermostat is satisfied. At the end of the cooling cycle, the blower will ramp down to 50% of full capac- ity where it will stay for 60 seconds. Then it will ramp down to zero. In every case, it will take the motor 30 seconds to ramp from one speed to another.

Tap D is the normal profile, best suited for most of the country, where neither excessive humidity nor extremely dry conditions are the norm. On a call for cooling, the motor will ramp up to 63% of full capacity and will stay there for 90 seconds, then will ramp up to full capacity. At the end of the cooling cycle, the motor will ramp down to 63% of full capac- ity and will stay there for 30 seconds, then will ramp down to zero. In every case, it will take the motor 30 seconds to ramp from one speed to another.

Continuous Blower Operation

The blower will run continuously whenever the wall thermostat fan switch is in the ON position. The furnace blower will run at the speed selected on the FAN SPEED jumpers on the main control board

(HI COOL, LO COOL, HI HEAT or LO HEAT). When the jumper is in the VS G position, the blower will run at 50% of the high cool speed.

Intermittent Blower Cooling

On cooling/ heating thermostats with a fan switch, when the fan switch is set in the auto position and the thermostat calls for cooling, a circuit is completed between the R, Y and G terminals. The motor is energized through the Y1 cool terminal and runs on the speed selected on the COOL tap of the control board. The fan off setting is fixed at 60 seconds for SEER enhancement. The control board can accommodate two- stage cooling. When a two-stage cool thermostat is connected to the Y1 and Y2 terminals on the board, the blower will operate on LOW COOL speed when Y1 is energized and on HI COOL speed when Y1 and Y2 are energized.

Intermittent Blower Heating

On cooling/ heating thermostats with a fan switch, when the fan switch is set in the auto position and the thermostat calls for heating, a circuit is completed between the R and W terminals. The indoor fan motor is energized through the W1 heat terminal and runs on the speed selected on the HEAT tap of the control board.

Humidistat

When a humidistat is installed in the system, the “Humidistat Installed?” jumper on the control board should be moved to the YES position.

The cooling CFM will then be reduced by 15% whenever the humidistat indicates high humidity.

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Contents List of Tables Models TM9V*MPList of Sections List of FiguresSafety Requirements Section I SafetySpecific Safety Rules and Precautions Codes and Standards Combustion AIR Quality List of ContaminantsFurnace Location and Clearances InspectionDuct Flanges Floor Base and Ductwork Installation DownflowSection II Ductwork Ductwork General InformationCoil Flange Installation Coil InstallationCOIL/FURNACE Assembly MC/FC/PC Series Coils Furnace Assembly MC & FC Series CoilsCritical Coil Projection Downflow Duct ConnectorsCoil / Furnace Assembly HC Series Coils Bottom Return and Attic InstallationsDownflow Application Horizontal ApplicationSection III Filters Filter InstallationCabinet Dimensions Inches Attempt to install filters inside the furnaceSide Return GAS SafetyGAS Piping Installation Section IV GAS PipingManifold Pressures in. w.c Manifold Pressures kPa High Altitude Pressure Switch ConversionGAS Orifice Conversion for Propane LP High Altitude GAS Orifice ConversionSupply Voltage Connections Section V Electrical PowerElectrical Power Connections LOW Voltage Control Wiring ConnectionsAC 9A TWO Stage Variable Speed Furnace OD Models AC 24C ID Models OD Models Single Stage Thermostat Accessory ConnectionsElectronic AIR Cleaner Connection Humidifier ConnectionTypical. Combustion Pipe Drain Tee Condensate Drain TerminationWill cause the furnace Airflow Horizontal Left Horizontal Right Inducer AS Received Right ConfigurationModel Input Pipe Size Maximum Combustion AIR and Vent SafetySection VII Combustion AIR and Vent System Combustion AIR/VENT Pipe SizingFitting Equivalent Length Combustion AIR and Vent Piping AssemblyCombustion AIR / Venting ElbowHome Layout Vent ClearancesVenting Multiple Units Vent SystemVent Applications and Termination Ambient Combustion Air Supply Downward VentingOutdoor Combustion Air Combustion AIR SupplyFree Area Combustion Air Source From OutdoorsDampers, Louvers and Grilles Canada Only Air Supply Openings and DuctsVentilated Combustion Air Termination Ventilated Combustion AirIgnition System Sequence Section Viii START-UP AdjustmentsVent Blower Rotation GAS Piping Leak CheckRevolution Seconds ForRevolution Cu Ft Inlet GAS Pressure Range Adjustment of Manifold GAS Pressure & Input RateRead the inlet gas pressure Read the manifold gas pressureVariable Speed Motors Adjustment of Temperature RiseAdjustment of FAN Control Settings Heating Indoor Fan Off DelayHigh / LOW Heat CFM High / LOW Speed Cooling and Heat Pump CFMSection X Normal Operation and Diagnostics Section IX Safety ControlsHeating Cycle TroubleshootingFurnace Control Diagnostics Diagnostic Fault Code Storage and Retrieval Description Section XI Replacement Parts ListReplacement Part Contact Information Wiring Diagram XII WiringDiagram York International Corp York Drive Norman, OK

TM9V*MP specifications

Johnson Controls has long been a leader in providing innovative comfort solutions, and their TM9V*MP series of variable speed air handlers is a testament to their commitment to efficiency and performance. These products are designed to optimize heating and cooling in both residential and commercial applications, ensuring superior indoor air quality and comfort year-round.

One of the standout features of the TM9V*MP series is its variable speed technology. Unlike traditional single-speed systems, the TM9V*MP adjusts its airflow according to real-time heating and cooling demands. This not only enhances comfort by maintaining consistent temperatures but also significantly reduces energy consumption. The variable speed motor operates quietly and efficiently, making it ideal for both living environments and workplaces.

In terms of design, the TM9V*MP is engineered for ease of installation and maintenance. It comes in a compact size that allows for flexible positioning within existing ductwork, making retrofits simpler for contractors. Additionally, the modular design allows for easy access to internal components, which facilitates hassle-free servicing and maintenance.

The unit also features a robust filtration system that works in tandem with a range of air quality technologies. This includes optional media filters that capture allergens and particulates, ensuring that the air quality within a space is not only comfortable but also healthy. The integration of advanced technologies, such as integrated Wi-Fi capabilities, provides users with the ability to monitor and adjust settings remotely via smartphones or tablets.

Moreover, the TM9V*MP series is compatible with a wide range of communication protocols, enabling seamless connectivity with smart home systems. This means that users can create customized comfort profiles and take advantage of energy-saving features automatically.

Durability is another key characteristic of the TM9V*MP series. Built with high-quality materials and subjected to rigorous testing, these air handlers are designed to endure even the most demanding conditions while providing reliable performance over time.

In summary, Johnson Controls' TM9V*MP series offers an array of features that cater to modern comfort demands. With its variable speed technology, user-friendly design, air quality enhancements, and strong connectivity options, it stands out as a prime choice for both residential and commercial HVAC applications, setting a high standard for efficiency and indoor comfort.
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