General Troubleshooting (cont’d)

PROBLEM (cont'd)

PROBABLE CAUSE (cont'd)

REMEDY (cont'd)

Burner cycle on and off

1. Gas pressure too high or too low.

1.

Supply pressure should be 5" - 14" w.c. for natural gas or 11" - 14"

 

 

 

w.c. for propane gas.

 

2.

Burner not grounded

2.

Make certain integrated circuit board is grounded to ignitor.

 

3.

Circuit board not grounded.

3.

Make certain integrated circuit board is grounded to furnace chassis.

 

4.

Faulty integrated circuit board

4.

If 24 volt is available to the integrated circuit board and all other

 

 

 

causes have been eliminated, replace board.

 

5.

Combustion air proving switch(es) not

5.

 

 

closing.

a) Make sure unit is properly vented.

 

 

 

b) Remove obstructions from vent.

 

 

 

c) Replace faulty tubing to pressure switch.

 

6.

Faulty combustion air proving switch.

6.

Replace combustion air proving switch.

 

7.

Flame sensor grounded.

7.

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

 

 

 

is not cracked. Replace as required.

 

8.

Cracked ceramic at sensor.

8.

Replace sensor.

 

9.

Incorrect polarity.

9.

Reverse line volt leads to integrated circuit board.

No heat (Heater

1. Incorrect valve outlet pressure or orifice.

1.

Check valve outlet pressure. See Rating plate for manifold pressure.

Operating)

2. Cycling on limit control.

2.

Check air throughput.

 

3.

Improper thermostat location or adjustment.

3.

See thermostat manufacturer's instructions.

Fan or venter motor will

1. Circuit open.

1.

Check wiring and connections.

not run

2. Defective integrated circuit board.

2.

Replace board.

 

3.

Defective motor.

3.

Replace motor.

Fan or venter motor turns

1. Motor overload device cycling on and off.

1.

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

on and off while burner is

 

 

 

 

operating

 

 

 

 

 

 

 

 

Fan or venter motor cuts

1. Low or high voltage supply.

1.

Correct electric supply.

out on overload

2. Defective motor.

2.

Replace motor.

 

3.

Poor airflow.

3.

Clean motor, fan, fan guard, filter, and coils.

 

4.

Defective bearing or lubrication.

4.

Lubricate bearings (motor permitting) or replace motor.

FOR SERVICE OR REPAIR, FOLLOW THESE STEPS IN ORDER:

FIRST:

Contact the Installer

 

Name __________________________________________________________

 

Address_________________________________________________________

 

__________________________________________________________

 

__________________________________________________________

 

Phone _____________________________________

SECOND:

Contact the nearest distributor (See Yellow Pages). If no listing,

 

contact Authorized Factory Representative, 1-800-695-1901 (Press 1).

THIRD:

Contact

REZNOR®/ Thomas & Betts Corporation

 

 

150 McKinley Avenue

 

 

Mercer, PA 16137

 

 

Phone: (724) 662-4400

Model No. _________________________________

Heater Serial No._____________________________

Date of Installation ___________________________

 

(800) 695-1901; www.RezSpec.com

 

©2005 Thomas & Betts Corporation, All rights reserved.

 

MANUFACTURER OF HEATING, COOLING, AND VENTILATING SYSTEMS

Form RZ-NA-I-LDAP, P/N 207733 (Rev 2), Page 40

Trademark Note: Reznor® and TCORE2® are trademarks of Thomas & Betts.

9/05 Form RZ-NA I-LDAP (Version .2)

Page 39 Page 40
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Thomas & Betts LDAP 1200 warranty General Troubleshooting cont’d, No heat Heater
Page 39 Page 40

LDAP 1200 specifications

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