Thomas & Betts BE, FE warranty Troubleshooting, TRO Uble PRO Bable C Ause Remedy

Page 27

42. Troubleshooting

TRO UBLE

PRO BABLE C AUSE

REMEDY

Ve nte r m otor will

1

. No power to unit .

1

. T urn on power, check supply fuses, or circuit breaker. If unit is equipped with

not start

 

 

 

unit -mounted disconnect switch, check circuit breaker (See P aragraph 11).

 

2

. No 24 volt power to venter relay.

2

. T urn up thermostat; check control transformer output .

 

3

. Venter relay defective.

3

. Replace relay.

 

4

. Defective motor or capacitor.

4

. Replace motor or capacitor.

Pilot will not light

1

. Manual valve not open.

1

. Open manual valve.

(spark ignition

2

. Air in gas line.

2

. Bleed gas line.

syste m )

3

. Dirt in pilot orifice.

3

. Remove and clean with compressed air or solvent (do not ream).

 

4

. Gas pressure too high or too low.

4

. Adjust supply pressure. (See P aragraph 10).

 

5

.

Kinked pilot tubing.

5

. Replace tubing.

 

6

.

P ilot valve does not open.

6

. If 24 volt available at valve, replace valve.

 

7

. No spark:

7.

 

a) Loose wire connections

a) Be certain all wires connections are solid.

 

b) T ransformer failure.

b) Be certain 24 volts is available.

 

c) Incorrect spark gap.

c) Maintain spark gap at .100".

 

d) Spark cable shorted to ground.

d) Replace worn or grounded spark cable.

 

e ) Spark electrode shorted to ground.

e ) Replace pilot if ceramic spark electrode is cracked or grounded.

 

f) Drafts affecting pilot .

f) Make sure all panels are in place and tightly secured to prevent drafts at pilot .

 

g) Ignition control not grounded.

g) Make certain ignition control is grounded to furnace chassis

 

h) Faulty ignition controller.

h) If 24 volt is available to ignition controller and all other causes have been

 

 

 

 

eliminated, replace ignition control.

 

8

. Optional lockout device interrupting control

8

. Reset lockout by interrupting control at thermostat .

 

circuit by above causes.

 

 

 

9

. Faulty combustion air proving switch.

9

. Replace combustion air proving switch.

Pilot lights, m ain

1

. Manual valve not open.

1

. Open manual valve.

valve will not ope n

2

. Main valve not operating.

2.

(Spark Ignition

a) Defective valve.

a) If 24 volt is measured at valve connections and valve remains closed, replace

syste m )

 

 

 

valve.

 

b) Loose wire connections.

b) Check and tighten all wiring connections.

 

3

. Ignition control does not power main valve.

3.

 

a) Loose wire connections.

a) Check and tighten all wiring connections.

 

b) Flame sensor grounded. (P ilot lights - spark

b) Be certain flame sensor lead is not grounded or insulation or ceramic is not

 

continues)

cracked. Replace as required.

 

c) Gas pressure incorrect .

c) Set supply pressure at 5" w.c. to 14" w.c. for natural gas and 11" w.c. to 14"

 

 

 

 

w.c. for propane gas.

 

d) Cracked ceramic at sensor.

d) Replace sensor.

 

e ) Faulty ignition controller.

e ) See P aragraph 33. If all checks indicate no other cause, replace ignition

 

 

 

 

controller. DO NOT AT T EMP T T O REP AIR IGNIT ION CONT ROLLER.

 

 

 

 

T HIS DEVICE HAS NO FIELD REP LACEABLE P ART S.

 

 

 

 

 

No he at (He ate r

1

. Incorrect manifold pressure or orifices.

1

. Check manifold pressure (See P aragraph 10).

O pe rating)

2

. Cycling on limit control.

2

. Check air throughput (See P aragraph 15).

 

3

. Improper thermostat location or adjustment .

3

. See thermostat manufacturer's instructions.

C old air de live re d

1

. Fan control improperly wired

1

. Connect as per wiring diagram.

O n Start-up

2

. Defective fan control.

2

. Replace fan control.

 

 

 

 

 

During O pe ration

3

. Incorrect manifold pressure.

3

. Check manifold line pressure (See P aragraph 10).

Motor will not run

1

. Circuit open.

1

. Check wiring and connections. .

 

2

. Fan control inoperative.

2

. Replace fan control.

 

3

. Defective motor or capacitor.

3

. Replace motor or capacitor.

Motor turns on

1

. Fan control improperly wired.

1

. Connect as per wiring diagram.

and off while

2

. Defective fan control.

2

. Replace fan control.

burne r is ope rating

3

. P oor contact between fan control and heat

3

. Check for bent mounting or loose mounting screws.

(Se e m otor cuts out

exchanger tube. Surface contact is required.

 

 

on ove rload

4

. Motor overload device cycling on and off.

4

. Check motor load against motor rating plate. Replace motor if needed.

be low)

5

. Low ambient temperature (less than 40o F)

5

. Install fan delay relay kit (See P aragraph 17.)

 

causing false cycling.

 

 

 

 

 

 

 

Fan m otor cuts

1

. Low or high voltage supply .

1

. Correct electric supply.

out on ove rload

2

. Defective motor.

2

. Replace motor.

 

3

. P oor air flow.

3

. Clean motor, fan and fan guard.

 

4

. Defective bearing or lubrication.

4

. Lubricate bearings or replace motor.

Blowe r m otor

1

. Improper motor pulley and/or adjustment .

1

. See instructions in P aragraph 14.

cuts out on

2

. Improper static pressure in the duct system.

2

. Adjust duct system dampers.

ove rload

3

. Low voltage.

3

. Check power supply.

Mfg P/N 98807 Rev 8, Page 27

Page 26 Page 28
Image 27
Page 26 Page 28
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 Fan-Type, Power-Vented Unit Heater Dimensions inchesDimensions mm Blower-Type, Power-Vented Unit Heater Dimensions inches Dimensions contdUncrating and Preparation Unit Heater LocationClearances & Combustion Air 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 Horizontal Vent Terminal Clearances StructureLocation all directions unless specified Manifold or Orifice Pressure Settings Gas Piping and PressuresSizing a Gas Supply Line Electrical Supply and Connections Thermostat and Thermostat ConnectionsInstructions to Check Manifold Pressure 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 550Model Filter Replacement P/N Size Qty Optional Guards Options CD10 & CD12 Blower Models onlyOptional Multiple Heater Control Options CL31 & CL32 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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