Thomas & Betts FE, BE warranty Gas Piping and Pressures, Manifold or Orifice Pressure Settings

Page 10

10. Gas Piping and Pressures

WARNING

This appliance is equipped for a maximum gas supply pressure of 1/2 pound, 8 ounces, or 14 inches water column. Supply pressure higher than 1/2 pound requires installation of an additional service regulator external to the unit.

PRESSURE TESTING SUPPLY PIPING

Test Pressures Above 1/2 PSI: Disconnect the heater and manual valve from the gas supply line which is to be tested. Cap or plug the supply line.

Test Pressures Below 1/2 PSI: Before testing, close the manual

valve on the heater.

All piping must be in accordance with requirements outlined in the National Fuel Gas Code ANSI/Z223.1a (latest edition), published by the American Gas Association or CAN/CGA-B149.1 and B149.2, pub- lished by the Canadian Gas Association (See Paragraph 1). Gas supply piping installation should conform with good practice and with local codes.

Unit heaters for natural gas are orificed for operation with gas having a heating value of 1000 (+ or - 50) BTUH per cubic ft. If the gas at the installation does not meet this specification, consult the factory for proper orificing.

Pipe joint compounds (pipe dope) shall be resistant to the action of liquefied petroleum gas or any other chemical constituents of the gas being supplied.

Install a ground joint union and manual shut-off valve upstream of the unit control system, as shown in Figure 8. The 1/8" plugged tapping in the shut-off valve provides connection for supply line pressure test gauge. The National Fuel Gas Code requires the installation of a trap with a minimum 3" drip leg. Local codes may require a minimum drip leg longer than 3" (typically 6").

Gas connection sizes are included in the Dimensional Tables in Para- graph 3. After all connections are made, disconnect the pilot supply at the control valve and bleed the system of air. Reconnect the pilot line and leak-test all connections by brushing on a soap solution.

Figure 8 - Supply

Piping Connection

WARNING: All components of a gas supply system must be leak tested prior to placing equipment in service. NEVER TEST FOR LEAKS WITH AN OPEN FLAME. Failure to comply could result in personal injury, property damage or death.

Manifold or Orifice Pressure Settings

Measuring manifold gas pressure cannot be done until the heater is in operation. It is included in the steps of the "Check-Test-Start" proce- dure in Paragraph 24. The following warnings and instructions apply.

WARNING: Manifold gas pressure must never exceed 3.5" w.c. for natural gas and 10" w.c. for propane gas.

For Natural Gas: Manifold gas pressure is regulated by the combina- tion valve to 3.5" w.c. Inlet pressure to the valve must be a minimum of 5" w.c. or as noted on the rating plate and a maximum of 14" w.c.

For Propane Gas: Manifold gas pressure is regulated by the combina- tion valve to 10" w.c. Inlet pressure to the valve must be a minimum of 11" w.c. and a maximum of 14" w.c.

Sizing a Gas Supply Line

C a pa c i ty o f P i pi n g

C u b ic F e e t p e r H o u r b a s e d o n 0 . 3 " w . c . P r e s s u r e D r o p

S p e c if ic G r a v it y f o r N a t u r a l G a s - - 0 . 6 ( N a t u r a l G a s - - 1 0 0 0 B T U /C u b ic F t )

S p e c if ic G r a v it y f o r P r o p a n e G a s - - 1 . 6 ( P r o p a n e G a s - - 2 5 5 0 B T U /C u b ic F t )

L e n g t h

 

 

 

 

 

 

 

 

 

D ia m e t e r o f P ip e

 

 

 

 

 

 

 

 

o f

 

1 / 2 "

 

 

3 / 4 "

 

1 "

 

1 -1 / 4 "

 

 

1 -1 / 2 "

 

2 "

P ip e

N a t u ra l

P ro p a n e

N a t u ra l

P ro p a n e

N a t u ra l

P ro p a n e

N a t u ra l

P ro p a n e

N a t u ra l

P ro p a n e

N a t u ra l

P ro p a n e

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2 0 '

9 2

 

5 6

 

1 9 0

 

1 1 6

3 5 0

 

2 1 4

 

7 3 0

 

4 4 5

 

1 1 0 0

 

6 7 1

2 1 0 0

 

1 2 8 1

3 0 '

7 3

 

4 5

 

1 5 2

 

9 3

2 8 5

 

1 7 4

 

5 9 0

 

3 6 0

 

8 9 0

 

5 4 3

1 6 5 0

 

1 0 0 7

4 0 '

6 3

 

3 8

 

1 3 0

 

7 9

2 4 5

 

1 4 9

 

5 0 0

 

3 0 5

 

7 6 0

 

4 6 4

1 4 5 0

 

8 8 5

5 0 '

5 6

 

3 4

 

1 1 5

 

7 0

2 1 5

 

1 3 1

 

4 4 0

 

2 6 8

 

6 7 0

 

4 0 9

1 2 7 0

 

7 7 5

6 0 '

5 0

 

3 1

 

1 0 5

 

6 4

1 9 5

 

1 1 9

 

4 0 0

 

2 4 4

 

6 1 0

 

3 7 2

1 1 0 5

 

6 7 4

7 0 '

4 6

 

2 8

 

9 6

 

5 9

1 8 0

 

1 1 0

 

3 7 0

 

2 2 6

 

5 6 0

 

3 4 2

1 0 5 0

 

6 4 1

8 0 '

4 3

 

2 6

 

9 0

 

5 5

1 7 0

 

1 0 4

 

3 5 0

 

2 1 4

 

5 3 0

 

3 2 3

9 9 0

 

6 0 4

9 0 '

4 0

 

2 4

 

8 4

 

5 1

1 6 0

 

9 8

 

3 2 0

 

1 9 5

 

4 9 0

 

2 9 9

9 3 0

 

5 6 7

1 0 0 '

3 8

 

2 3

 

7 9

 

4 8

1 5 0

 

9 2

 

3 0 5

 

1 8 6

 

4 6 0

 

2 8 1

8 7 0

 

5 3 1

1 2 5 '

3 4

 

2 1

 

7 2

 

4 4

1 3 0

 

7 9

 

2 7 5

 

1 6 8

 

4 1 0

 

2 5 0

7 8 0

 

4 7 6

1 5 0 '

3 1

 

1 9

 

6 4

 

3 9

1 2 0

 

7 3

 

2 5 0

 

1 5 3

 

3 8 0

 

2 3 2

7 1 0

 

4 3 3

1 7 5 '

2 8

 

1 7

 

5 9

 

3 6

1 1 0

 

6 7

 

2 2 5

 

1 3 7

 

3 5 0

 

2 1 4

6 5 0

 

3 9 7

2 0 0 '

2 6

 

1 6

 

5 5

 

3 4

1 0 0

 

6 1

 

2 1 0

 

1 2 8

 

3 2 0

 

1 9 5

6 1 0

 

3 7 2

 

N o t e : W h e n

s iz in g s u p p ly lin e s , c o n s id e r p o s s ib ilit ie s

o f f u t u r e e xp a n s io n

a n d in c r e a s e d

r e q u ir e m e n t s .

 

 

 

 

 

 

R e f e r t o

N a t io n a l F u e l G a s C o d e f o r a d d it io n a l in f o r m a t io n

o n lin e s iz in g.

 

 

 

 

Form 436, Page 10

Page 9 Page 11
Image 10
Page 9 Page 11
Contents Model FE and be Gas-Fired, Power-VentedTable of Contents Unit HeatersSpecial Installations Aircraft Hangars/ Garages Installation CodesWarranty Fan-type unit heater is connected to a duct systemFan-Type, Power-Vented Unit Heater Dimensions inches DimensionsDimensions mm Dimensions contd Blower-Type, Power-Vented Unit Heater Dimensions inchesUnit Heater Location Uncrating and PreparationClearances & Combustion Air Suspension Clearances and Combustion Air contdSuspending the Heater 25-400 6152 18457 12305Venting Optional, Field-Installed Hanger KitsFour-Point Swivel Connectors Option CK10 See a Specific Venting Requirements read all beforeVenting contd Structure Horizontal Vent Terminal ClearancesLocation all directions unless specified Gas Piping and Pressures Manifold or Orifice Pressure SettingsSizing a Gas Supply Line Thermostat and Thermostat Connections Electrical Supply and ConnectionsInstructions to Check Manifold Pressure Typical Wiring Diagrams -- Pages 12 Field Control Wiring Length and GaugeModel Size Speed Form 436, Mfg P/N 98807 Rev 8, Fan Motor Adjusting Belt TensionThermostat Connections contd Blower MotorFan Control Blower Speed AdjustmentBlower Rotation Limit ControlGas Valve Combustion Air Proving SwitchBurner Air Adjustment Pilot and Ignition SystemCheck installation after start-up Check Installation and Start-UpCheck the installation prior to start-up Start-Up -- Typical Operating SequenceOptional Vertical Louvers Optional Vertical Louvers Option CD1Optional Duct Flange Option CD9 Blower Models only Sizes Range Air Deflection400 4935 550 Conversion Table Diameter to AreaOptional Guards Options CD10 & CD12 Blower Models only Model Filter Replacement P/N Size QtyOptional Multiple Heater Control Options CL31 & CL32 Pilot Flame Tubing Sensor Lead Burner Rack RemovalInstructions for Burner Rack Removal See Figures Burner Rack Hinged DownBurner Rack Removal contd Heat Exchanger Burner OrificesFlash Carryover Fan or BlowerOperating Gas Valve Fan contdVenter Motor Fan and Limit ControlsTroubleshooting TRO Uble PRO Bable C Ause RemedyFor Service or REPAIR, Follow These Steps in Order Name Address Phone

BE, FE specifications

Thomas & Betts, a subsidiary of ABB, is renowned for its innovative electrical products and solutions, particularly in the fields of connectors, terminals, and wiring devices. Among its extensive product lineup, the FE and BE series stand out for their exceptional performance and versatility in various applications.

The FE (Flat Eye) and BE (Blank Eye) connectors are designed to provide reliable electrical connections in demanding environments. These connectors are particularly well-suited for industrial, commercial, and residential applications, ensuring that they meet the rigorous standards required in these fields.

One of the key features of the FE and BE connectors is their robust construction. Made from high-quality materials, they are resistant to corrosion, moisture, and other environmental factors that could compromise the integrity of the connection. The connectors are engineered to withstand high temperatures and mechanical stress, making them ideal for use in harsh conditions where reliability is essential.

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