Johnson Controls TM9T*MP Section IX START-UP Adjustments, GAS Piping Leak Check

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505309-UIM-D-0511

SECTION IX: 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.

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.

HOT SURFACE IGNITION SYSTEM

Do not attempt to light this furnace by hand (with a match or any other means). There may be a potential shock hazard from the components of the hot surface ignition system. The furnace can only be lit auto- matically by its hot surface ignition system.

CALCULATING THE FURNACE INPUT (NAT. GAS)

Burner orifices are sized to provide proper input rate using natural gas

with a heating value of 1030 BTU/Ft3 (38.4 MJ/m3). If the heating value of your gas is significantly different, it may be necessary to replace the orifices.

NOTICE

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.

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 three attempts to light before locking out.

It is recommended that when the gas supply is first connected to the furnace, the ground union be loosened until the odor of gas is detected. When gas is detected, immediately tighten the union and check for gas leaks. Allow five minutes for any gas to dissipate before continuing with the startup procedure. Be sure that proper ventilation is available to dilute and carry away any vented gas.

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.

NOTICE

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 overfire 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 15 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.

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Contents List of Sections Models TM9T*MPList of Figures List of TablesSafety Requirements Section I SafetySpecific Safety Rules and Precautions Codes and Standards Combustion AIR Quality List of ContaminantsFurnace Location and Clearances InspectionSection II Ductwork Floor Base and Ductwork Installation DownflowDuctwork General Information Duct FlangesCOIL/FURNACE Assembly MC/FC/PC Series Coils Coil InstallationFurnace Assembly MC & FC Series Coils Coil Flange InstallationDownflow Duct Connectors Coil / Furnace Assembly HC Series CoilsBottom Return and Attic Installations Critical Coil ProjectionSuspended Furnace / Crawl Space Installation Attic InstallationHorizontal Application Downflow ApplicationSide Return Filter InstallationSection III Filters GAS Piping Installation GAS SafetySection IV GAS Piping Horizontal FiltersHigh Altitude Pressure Switch Conversion Section V Electrical PowerElectrical Power Connections GAS Orifice Conversion for Propane LPSupply Voltage Connections LOW Voltage Control Wiring ConnectionsPP32U70124 DN22H00124 DP22U70124 Two Stage Air Conditioner Two Stage PSC FurnaceTWO Stage PSC Furnace OD Models Section VI Twinning Twinning Operation Twinning InstructionsCondensate Drain Location Condensate hoses must slope downwards at all pointsTypical. Combustion Pipe Drain Tee Condensate Drain TerminationWill cause the furnace Airflow Horizontal Left Johnson Controls Right ConfigurationSection Viii Combustion AIR and Vent System Combustion AIR and Vent SafetyCombustion AIR/VENT Pipe Sizing Model Input Pipe Size MaximumElbow a Dimension Combustion AIR and Vent Piping AssemblyCombustion AIR / Venting Fitting Equivalent LengthHome Layout Vent ClearancesVenting Multiple Units Vent SystemVent Applications and Termination Outdoor Combustion Air Downward VentingCombustion AIR Supply Ambient Combustion Air SupplyDampers, Louvers and Grilles Canada Only Combustion Air Source From OutdoorsAir Supply Openings and Ducts Free AreaVentilated Combustion Air Specially Engineered InstallationsVentilated Combustion Air Termination Vent Blower RotationGAS Piping Leak Check Section IX START-UP AdjustmentsCalculating the Furnace Input NAT. GAS Ignition System SequenceSeconds For Revolution Cu FtRead the manifold gas pressure Adjustment of Manifold GAS Pressure & Input RateRead the inlet gas pressure Adjustment of FAN Control Settings Adjustment of Temperature RiseLeft Side Airflow Data Scfm Blower Performance CFM Any Position without filterBottom Airflow Data Scfm Section XI Normal Operation and Diagnostics Section X Safety ControlsFurnace Control Diagnostics Fabricated Parts Section XII Replacement Parts ListDiagnostic Fault Code Storage and Retrieval Wiring Diagram Section Xiii Wiring DiagramJohnson Controls Unitary Products York Drive Norman, OK

TM9T*MP specifications

Johnson Controls TM9T*MP is a state-of-the-art HVAC unit designed for modern commercial and residential applications. With its innovative technology and robust features, the TM9T*MP offers exceptional performance, efficiency, and reliability. This unit is engineered to provide optimal climate control, ensuring that indoor environments remain comfortable regardless of external weather conditions.

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In summary, Johnson Controls TM9T*MP sets a new standard in HVAC technology with its variable-speed compressor, multi-stage filtration, compact design, and smart capabilities. Committed to energy efficiency and indoor air quality, it promises to deliver comfort and sustainability in every setting.
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