Thomas & Betts BE Instructions for Burner Rack Removal See Figures, Burner Rack Hinged Down

Page 23
Pilot
Location
Push hinge pin to remove bottom panel
Figure 21- Bottom Access Panel Open

SERVICE AND MAINTENANCE

WARNING: If you turn off the power supply, turn off the gas. See Hazard Levels, page 2.

This unit will operate with a minimum of maintenance. To ensure long life and satisfactory performance, a heater that is operated under nor- mal conditions should be inspected and cleaned at the start of each heating season. If the heater is operating in an area where an unusual amount of dust or soot or other impurities are present in the air, more frequent maintenance is recommended.

visible. Do the following:

(a)Disconnect the pilot tubing from the pilot burner.

(b)Disconnect the flame sensing wire and high tension (spark) lead from the ignition control- ler.

Pilot

Flame

Tubing

Sensor Lead

Figure 22 - Spark Pilot Location

The following procedures should be carried out at least annually (See Paragraphs 32-41 for specific instructions.):

1.Clean all dirt and grease from the primary and secondary combus- tion air openings.

2.Fan Models - Clean the fan blade, fan guard, and motor.

3.Blower Models - Clean the blower, the belt guard, the inlet guard, and motor of all dirt and grease. Check the blower belt for tension and wear. Replace a worn belt that may fail before the next sched- uled maintenance check.

4.Clean the heat exchanger both internally and externally.

5.Check the pilot burner and main burners for scale, dust, or lint ac- cumulation. Clean as needed.

6.Check the vent system for soundness. Replace any parts that do not appear sound.

7.Check the wiring for any damaged wire. Replace damaged wiring. (See Paragraph 11 for replacement wiring requirements.)

NOTE: Use only factory-authorized replacement parts.

32. Burner Rack Removal

These unit heaters have a convenient bottom access panel. The pilot is attainable with the bottom panel open. With the access panel removed, the burner rack assembly will hinge down for removal. Use the follow- ing step-by-step instructions for removal of the bottom access panel and the complete burner rack assembly.

Instructions for Burner Rack Removal (See Figures 21-24.)

1.Shut the gas supply off ahead of the combination valve.

2.Turn off electric supply.

3.Remove the two sheet metal screws located at the rear of the bot- tom panel.

4.Allow bottom panel to hinge

down from the front.

5. Push in one of the two spring- loaded hinge pins located at the front of the bot- tom panel (in- side), and com- pletely remove

the bottom panel.

6. The bottom of the pilot is now

7A. Heaters manufactured beginning 8/91 (Serial No. Date Code AQH) - The burner rack is indexed as illustrated in Figure 23. While supporting the burner rack, remove the screws (two or three) that hold the burner rack support. (For screw location, refer to Figure 23.) Remove the burner rack support allowing the burner rack as- sembly to swing down (See Figure 24).

Burner Rack Support with Indexing

Burner Rack Support on units

Screwsmanufactured prior to 8/91 was

not indexed

Figure 23 - Burner Rack Support and Retaining Screws

7B. Heaters manufactured prior to 8/91 (Serial No. Date Code AQH) Loosen the sheet metal screws (two or three) located at the front of the burner rack assembly. See Figures 23. These screws retain the burner rack support. While supporting the burner rack assembly, slide the burner rack support and remove it from the screws, allow- ing the burner rack assembly to swing down (See Figure 24).

8.To Remove the Burner Rack -- With the burner rack assembly "hanging" down, lift up on the rear and slide the assembly up and out of the manifold support brackets.

Figure 24 -

Burner Rack

Hinged Down

Mfg P/N 98807 Rev 8, Page 23

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Contents Unit Heaters Gas-Fired, Power-VentedTable of Contents Model FE and beFan-type unit heater is connected to a duct system Installation CodesWarranty Special Installations Aircraft Hangars/ GaragesDimensions mm DimensionsFan-Type, Power-Vented Unit Heater Dimensions inches Blower-Type, Power-Vented Unit Heater Dimensions inches Dimensions contdClearances & Combustion Air Uncrating and PreparationUnit Heater Location 25-400 6152 18457 12305 Clearances and Combustion Air contdSuspending the Heater SuspensionSpecific Venting Requirements read all before Optional, Field-Installed Hanger KitsFour-Point Swivel Connectors Option CK10 See a VentingVenting contd Location all directions unless specified Horizontal Vent Terminal ClearancesStructure Sizing a Gas Supply Line Manifold or Orifice Pressure SettingsGas Piping and Pressures Instructions to Check Manifold Pressure Electrical Supply and ConnectionsThermostat and Thermostat Connections Field Control Wiring Length and Gauge Typical Wiring Diagrams -- Pages 12Model Size Speed Form 436, Mfg P/N 98807 Rev 8, Blower Motor Adjusting Belt TensionThermostat Connections contd Fan MotorLimit Control Blower Speed AdjustmentBlower Rotation Fan ControlPilot and Ignition System Combustion Air Proving SwitchBurner Air Adjustment Gas ValveStart-Up -- Typical Operating Sequence Check Installation and Start-UpCheck the installation prior to start-up Check installation after start-upSizes Range Air Deflection Optional Vertical Louvers Option CD1Optional Duct Flange Option CD9 Blower Models only Optional Vertical LouversConversion Table Diameter to Area 400 4935 550Optional Multiple Heater Control Options CL31 & CL32 Model Filter Replacement P/N Size QtyOptional Guards Options CD10 & CD12 Blower Models only Burner Rack Hinged Down Burner Rack RemovalInstructions for Burner Rack Removal See Figures Pilot Flame Tubing Sensor LeadBurner Rack Removal contd Fan or Blower Burner OrificesFlash Carryover Heat ExchangerFan and Limit Controls Fan contdVenter Motor Operating Gas ValveTRO Uble PRO Bable C Ause Remedy TroubleshootingName Address Phone For Service or REPAIR, Follow These Steps in Order

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.

Moreover, the design of FE and BE connectors facilitates easy installation and maintenance. The connectors come with user-friendly features such as a clear labeling system and intuitive locking mechanisms, ensuring a secure fit and minimizing the risk of connection failure. Additionally, these connectors are compatible with various wire sizes, offering flexibility for different projects.

Technologically, Thomas & Betts has integrated advanced manufacturing processes to ensure precision and consistency in the production of FE and BE connectors. This attention to detail results in products that not only meet but often exceed industry standards, providing customers with peace of mind regarding their electrical systems.

In terms of performance, the FE and BE connectors deliver exceptional conductivity, which is critical for minimizing energy loss and ensuring efficient operation in electrical systems. This characteristic is especially important in applications where energy efficiency and reliability are paramount.

In summary, Thomas & Betts FE and BE connectors embody a perfect blend of durability, ease of use, and technological advancement. Their robust design, compatibility with various wire sizes, and resistance to environmental stressors make them a preferred choice for professionals in the electrical industry. With a commitment to quality and innovation, Thomas & Betts continues to set the standard in electrical connectivity solutions, ensuring that their products remain at the forefront of the industry.
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