Sterling TF-125, TF-400 Tubular Unit Heater High Altitude Deration, Natural GAS Propane LP GAS

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TUBULAR UNIT HEATER

HIGH ALTITUDE DERATION

This Tubular Unit Heater has been manufactured utilizing standard burner orifices and a normal manifold pressure setting as per the specifications shown on your unit rating plate.

All unit deration must be done through field adjustments by a qualified technician. Once the proper adjustments are made in the field, attach label #J17-06459 to the unit, and record adjusted manifold pressure, altitude of the unit installation and the technician’s name and date on the label using a permanent marker.

Refer to Installation Instruction section on Adjustments- Gas Input Rate for adjusting the manifold pressure.

Table 5A

 

 

NATURAL GAS

PROPANE (LP) GAS

 

 

 

 

 

 

 

 

Heating*

Manifold

Heating*

Manifold

Altitude

Value

Pressure

Value

Pressure

(Feet)

BTU/Cu. ft.

(In. W.C.)

BTU/Cu. ft.

(In. W.C.)

 

 

 

 

 

 

2,000

 

948

3.5

2,278

8.6

 

 

 

 

 

 

2,500

 

931

3.5

2,237

8.5

 

 

 

 

 

 

3,000

 

914

3.3

2,196

8.4

 

 

 

 

 

 

3,500

 

897

3.2

2,156

8.4

 

 

 

 

 

 

4,000

 

881

3.2

2,116

8.3

 

 

 

 

 

 

4,500

 

865

3.2

2,077

8.2

 

 

 

 

 

 

5,000

 

849

3.1

2,039

8.1

 

 

 

 

 

 

5,500

 

833

3.1

2,000

8.0

 

 

 

 

 

 

6,000

 

818

3.0

1,964

7.9

 

 

 

 

 

 

6,500

 

802

3.0

1,927

7.7

 

 

 

 

 

 

7,000

 

787

2.9

1,891

7.6

 

 

 

 

 

 

7,500

 

771

2.9

1,853

7.5

 

 

 

 

 

 

8,000

 

756

2.8

1,817

7.4

 

 

 

 

 

 

8,500

 

741

2.8

1,781

7.2

 

 

 

 

 

 

9,000

 

726

2.7

1,745

7.1

 

 

 

 

 

 

9,500

 

711

2.7

1,709

6.9

 

 

 

 

 

 

10,000

 

696

2.6

1,673

6.8

 

 

 

 

 

 

*Notes:

1.Consult local utility for actual heating value.

2.Tables based on heating value of 1,050 BTU/Cu. ft. at sea level.

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Contents Receiving Instructions Tubular GAS Fired Direct Spark Propeller Unit HeatersDescription Table of ContentsGeneral Safety Information Dimensional Drawing Tubular Propeller Unit Heater Installation Installation Pipe Sizing GAS PipingGas Pipe Size Gas Piping Requirements Pipe InstallationThermostat Wiring and Location Low-voltage T Thermostat Wiring Single Stage Two StageElectrical Connections Electrical Connections Tubular Unit Sizes with Optional 2 Stage Ignition Vertically Vented Unit Heaters Category VentingVenting Categories Structure Termination Locations Horizontally Vented Unit Heaters CategoryVenting Venting Venting Explanation of Controls See Figure OperationShut Down GAS Input Rate Primary AIR Shutter AdjustmentMain Burner Orifice Schedule Natural GAS Propane LP GAS Tubular Unit Heater High Altitude DerationSymptoms Possible Causes Corrective Action Tubular Propeller Troubleshooting GuideRealign power ventor wheel Check for continuous 115v on terminal LED Status Indicates CHECK/REPAIR Periodic Service MaintenanceNever over oil the motor or premature failure may occur Power Vented Tubular Propeller Unit Heaters Limited WarrantyPropeller Parts Heat Exchanger AssemblyTurbulator/High Limit Location Power Venter AssemblyGeneral With power and gas offWith power and gas on PRE-INSPECTION Information