Johnson Controls TM9V MP Section Viii START-UP Adjustments, GAS Piping Leak Check

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438335-UIM-B-0509

SECTION VIII: START-UP AND

ADJUSTMENTS

The initial start-up of the furnace requires the following additional procedures:

All electrical connections made in the field and in the factory should be checked for proper tightness.

When the gas supply is initially connected to the furnace, the gas piping may be full of air. In order to purge this air, it is recommended that the ground union be loosened until the odor of gas is detected. When gas is detected, immediately retighten the union and check for leaks. Allow five minutes for any gas to dissipate before continuing with the start-up procedure. Be sure proper ventilation is available to dilute and carry away any vented gas.

GAS PIPING LEAK CHECK

FIRE OR EXPLOSION HAZARD

Failure to follow the safety warnings exactly could result in serious injury, death or property damage.

Never test for gas leaks with an open flame. Use a commercially available soap solution made specifically for the detection of leaks to check all connections. A fire or explosion may result causing property damage, personal injury or loss of life.

Burner ignition may not be satisfactory on first startup due to resid- ual air in the gas line or until gas manifold pressure is adjusted. The ignition control will make three attempts to light before locking out.

With furnace in operation, check all of the pipe joints, gas valve connec- tions and manual valve connections for leakage using an approved gas detector, a non-corrosive leak detection fluid or other leak detection methods. Take appropriate action to stop any leak. If a leak persists, replace the faulty component.

The furnace and its equipment shutoff valve must be disconnected from the gas supply during any pressure testing of that system at test pres- sures in excess of 0.5 psig (3.45 kPa).

The furnace must be isolated from the gas supply piping system by closing the equipment shutoff valve during any pressure testing of the gas supply system.

IGNITION SYSTEM SEQUENCE

1.Turn the gas supply ON at external valve and main gas valve.

2.Set the thermostat above room temperature to call for heat.

3.System start-up will occur as follows:

a.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.

b.After this warm up, the ignition module will energize (open) the main gas valve.

c.After flame is established, the supply air blower will start in about 30 seconds.

CALCULATING THE FURNACE INPUT (NATURAL GAS)

Burner orifices are sized to provide proper input rate using natural gas with a heating value of 1030 BTU/cu.ft. (38.4 MJ/m3). If the heating value of your gas is significantly different, it may be necessary to replace the orifices.

NOTE: DO NOT set manifold pressure less than 3.2” w.c. or more than 3.8” w.c. for natural gas at sea level. If manifold pressure is outside this range, change main burner orifices.

NOTE: If orifice hole appears damaged or it is suspected to have been redrilled, check orifice hole with a numbered drill bit of correct size. Never redrill an orifice. A burr-free and squarely aligned orifice hole is essential for proper flame characteristics.

DO NOT bottom out gas valve regulator adjusting screw. This can result in unregulated manifold pressure and result in excess over- fire and heat exchanger failures.

Verify natural gas input rate by clocking meter.

1.Turn off all other gas appliances and pilots.

2.Run furnace for a minimum of 3 minutes in heating operation.

3.Measure time (in sec) for gas meter to complete 1 revolution and note reading. The 2 cubic feet dial provides a more accurate mea- surement of gas flow.

4.Refer to Table 9 for cubic feet of gas per hour.

5.Multiply cubic feet per hour by heating valve (BTU/cu.ft.) to obtain input.

If clocked rate does not match the input rate from the unit nameplate. follow steps in next section to adjust the manifold pressure. Repeat 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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Contents List of Sections Section I SafetyList of Figures List of TablesCombustion AIR Quality List of Contaminants Specific Safety Rules and PrecautionsSafety Requirements Directly BELOW. Keep Clear of ALL OBSTRUC- Tions Codes and StandardsInspection Ductwork General Information Section II DuctworkFurnace Location and Clearances Coil Installation Floor Base and Ductwork Installation DownflowCOIL/FURNACE Assembly MC/FC/PC Series Coils Furnace Assembly MC & FC Series CoilsFurnace Assembly PC Series Coils Furnace Assembly MC Series Coils onlyCoil / Furnace Assembly HC Series Coils Coil Size Dimension C InchBottom Return and Attic Installations Downflow Duct Connectors Attic InstallationSuspended Furnace / Crawl Space Installation Horizontal ApplicationAttempt to install filters inside the furnace Filter InstallationSection III Filters Side ReturnSection IV GAS Piping Electrical Power Connections Section V Electrical PowerManifold Pressures in. w.c Manifold Pressures kPa First Stage Manifold Pressures in. w.cSupply Voltage Connections LOW Voltage Control Wiring ConnectionsAfue LbsAC 9A TWO Stage Variable Speed Furnace OD Models Optional Harness AC 24CID Models OD Models Electronic AIR Cleaner Connection Accessory ConnectionsHumidifier Connection TwinningCondensate Drain Trap and Drain Freeze Protection Condensate Drain TerminationWill cause the furnace Airflow Horizontal Left Horizontal Right Inducer AS Received Combustion AIR/VENT Pipe Sizing Combustion AIR and Vent SafetySection VII Combustion AIR and Vent System Combustion AIR / Venting Combustion AIR and Vent Piping AssemblyFitting Equivalent Length Furnace Vent Connection SizesHome Layout Vent ClearancesVenting Multiple Units Vent SystemVent Applications and Termination Outdoor Combustion Air Combustion AIR SupplyCombustion Air Source From Outdoors Ambient Combustion Air SupplyFree Area Air Supply Openings and DuctsVertical Duct or 13 cmVentilated Combustion Air Specially Engineered InstallationsVentilated Combustion Air Termination Vent Blower RotationGAS Piping Leak Check Section Viii START-UP AdjustmentsIgnition System Sequence Calculating the Furnace Input Natural GASRevolution Cu Ft Seconds For Size of Test Dial Revolution Cu FtSeconds For Read the inlet gas pressure Adjustment of Manifold GAS Pressure & Input RateRead the manifold gas pressure Inlet GAS Pressure RangeSection IX Safety Controls Sequence of Operation Limit ControlsFurnace Control Diagnostics TroubleshootingHot Surface Ignition System Slow Green Flash Normal operationDiagnostic Fault Code Storage and Retrieval Description Section X Replacement Parts ListReplacement Part Contact Information Section XI Wiring Diagram Supersedes 438335-UIM-A-0209 Johnson Controls Unitary Products York Drive Norman, OK

TM9V MP specifications

The Johnson Controls TM9V MP is a cutting-edge variable capacity air conditioning system designed to provide optimal comfort and energy efficiency for residential and light commercial applications. This model is engineered with advanced technologies that cater to the needs of modern consumers who prioritize both performance and sustainability.

One of the standout features of the TM9V MP is its variable-speed compressor. Unlike traditional systems that operate at a fixed speed, this system can adjust its output based on the indoor temperature and humidity levels. This capability allows for precise temperature control and reduces energy consumption, ultimately leading to significant savings on utility bills. By maintaining a more consistent temperature, the TM9V MP enhances overall comfort in living spaces.

Another critical aspect of the TM9V MP is its integration of intelligent control technology. The system comes equipped with a user-friendly interface, which enables homeowners to easily monitor and adjust settings according to their preferences. Smart home integration is also a key feature, allowing for remote access and control through compatible smart devices. This ensures that users can manage their HVAC settings from anywhere, providing convenience and peace of mind.

The TM9V MP is also designed with high-efficiency ratings, often achieving SEER ratings above 18. This excellent performance not only complies with stringent energy efficiency regulations but also qualifies for various rebates and incentives in many regions, making it a financially attractive choice. The unit’s environmentally friendly refrigerant further emphasizes its commitment to sustainability.

In terms of construction and durability, the TM9V MP boasts a rugged design with high-quality components. Its enhanced sound insulation minimizes operational noise, making it suitable for residential settings where quiet operation is essential. The unit is also designed for easy installation and maintenance, which can further reduce lifecycle costs.

Overall, the Johnson Controls TM9V MP represents a blend of advanced engineering, energy efficiency, and user-friendly technology. Its variable speed compressor, smart controls, high-efficiency ratings, and durable construction make it a top choice for anyone seeking an HVAC solution that meets modern comfort and sustainability standards. With the TM9V MP, users can enjoy the benefits of a comfortable indoor environment while contributing to a greener future.
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