Gas-Fired Products PTU Series manual Lighting and Shutdown Instructions, Sequence of Operation

Page 41

18.0) LIGHTING AND SHUTDOWN INSTRUCTIONS

Never operate the heater with the access panel open or removed.

The access panels must be closed tightly with all the necessary screws during operation.

Failure to do so may result in death, serious injury or property damage.

The access doors on either side of the burner must be securely fastened before operating the heater.

DANGER

FIRE HAZARD

Never operate the heater with the access panel open or removed. This access panel must be closed tightly with all the necessary screws during operation.

Failure to do so may result in death, serious injury or property damage

SIDE VIEW

1) Turn on the gas and electrical supply. Rotate the gas valve knob counter-clockwise

to the “ON” position.

2)Set the thermostat to call for heat. The blower motor will energize.

3)Ignition should occur after the 15-second pre-purge.

4)If the burner fails to light, or flame is not detected during the first trial for ignition (a period of approximately 15 seconds) the gas valve is de-energized and the control goes through an inter-purge delay of approximately 60 seconds before another ignition attempt. The control will attempt two additional ignition trials before going into lockout, and the valve relay will be de-energized immediately. The blower will be turned off following a post-purge period of approximately 30 seconds.

5)If the heater does not light, manually reset the thermostat or shut off power completely for 5 minutes before attempting to relight.

6) To permanently shut down the heater, rotate the gas valve knob clockwise

to the “OFF” position and turn off

the gas and electrical supply.

 

NOTE: THE LIGHTING AND SHUTDOWN INSTRUCTIONS ARE ALSO SHOWN ON THE PERMANENT NAMEPLATE LABEL ATTACHED TO THE HEATER.

19.0) SEQUENCE OF OPERATION

The chart below shows the sequence of operation for the normal operating cycle of the PTS/PTU when connected to a permanent 120V power supply and the heater is turned on and off by a remote 24V thermostat. (Electrical connection diagram C).

Thermostat

T0

T1

T2

T3

T4

T5

T6

 

 

 

 

 

 

 

Blower

 

 

 

 

 

 

 

Air switch

 

 

 

 

 

 

 

Red power light

 

 

 

 

 

 

 

Ignition

 

 

 

 

 

 

 

Gas valve

 

 

 

 

 

 

 

Flame sensing

 

 

 

 

 

 

 

Amber valve light

 

 

 

 

 

 

 

Call for heat, Thermostat on

 

 

 

 

 

 

 

15 secs pre-purge

 

 

 

 

 

 

 

15 secs trial for ignition

 

 

 

 

 

 

 

Normal operation flame sensing

 

 

 

 

 

 

 

Thermostat (turn off)

 

 

 

 

 

 

 

30 secs post-purge1

 

 

 

 

 

 

 

Heater OFF

 

Function ON

 

Function OFF

 

 

 

 

 

 

 

 

 

–40–

 

 

 

T7

Form #43343330 May 08

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Contents Installation and Operation Instructions Table of Contents Installer Responsibility SafetyInstallation Requirements General InformationHigh Altitude For Canada onlyPTS/PTU Minimum Clearances to CombustiblesMinimum Clearances to Combustibles Packing List SpecificationsNatural GAS Burner Package NumbersPTU 40-200 Body Package Descriptions Reflector, 4’ 11 ½’ End Reflector Accessory Package AccessoriesExhaust Hood Package Emitter Length Body Length Model Typical Layouts PTU / PTS SeriesPoisonous GAS and Soot Hazard Typical Assembly LayoutPTS Series Dimensions PTU Series Joining of Tube Sections Heater AssemblyTypical Assembly Overview PTU 40FT Shown Suspension Hazard Typical Suspension MethodsCUT Hazard Assembly of Tube SectionsMIN 8’ MAX 10’ Between Hangers Assembly of Extension SectionInserting Turbulators Adding Reflectors Assembly HazardAdding Optional Corner Reflector PTS only Adding Optional 90º Elbow PTS onlyAdding Optional U-BEND Reflector PTU only Adding 180U-Bend PTU onlyAttaching Burner BOX Assembly Instructions Connecting the Tiss SystemEnd View Angle Mounted Heaters only Do not USE AN Open Flame of ANY Kind to Test for Leaks GAS Connections and RegulationsKEY Dimensions and Components of the GAS Connections Manifold Pressure Combination GAS Valve is Factory SET Instructions for Pressure Test Gauge ConnectionSupply Pressure STEP-OPENING GAS Control Valve Electrical ConnectionsTH/W Ignition Module Terminal Designations 24VAC/RPS/W GNDLOW Voltage 24V Thermostat Connections Single Heaters Line Voltage 120V Thermostat Connections Single HeaterLine Voltage 120V Thermostat Connections Multiple Heaters Carbon Monoxide Hazard VentingSingle Heater Venting Horizontal Through Sidewall Single Heater Venting Vertical Through the Roof#10 Self-Drill Vent Pipe Screws PTS/PTU Common Vent Diameter Multiple Heater Vertical venting arrangementDirect Outside AIR for Combustion AIR for CombustionVertical Sequence of Operation Lighting and Shutdown InstructionsBurner Component Locations Electric Shock & Explosion Hazard Cleaning and MaintenanceTroubleshooting Guide Form Form #43343330 May Removal of Main Burner and Electrodes Replacing PartsAIR Switch Pressure Check Removal of GAS Valve and Manifold AssemblyTo Check Flame Sensor Circuit Ignition System ChecksIgnition Module Diagnostics Installation DataFasteners Replacement Parts Guide Burner BOXLabels/Manual 22c 22b 22a 40a 17a Description Body Components
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