Beckett CF2500 manual Standby, Cad Cell Resistance Measurement

Page 13

Section: Wire the Burner

Figure 11 - Typical Burner Sequence of Operation - 7505

 

 

1

Standby

9

Pump

 

 

 

 

 

 

 

Prime

 

 

 

 

 

 

 

 

 

2

 

3

 

 

4

 

Valve-on

Trial for

 

 

 

 

 

 

 

 

Lockout

 

Delay

 

 

 

Ignition

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

Ignition

Carryover

8

 

6

 

 

7

 

 

 

Motor-Off

 

 

 

 

 

 

Run

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Relight

 

 

Delay

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 4 - 7505 Flame Detection

Flame Detection Range

Normal = 0 to 1600 ohms

Limited = 1600 ohms to lockout

Cad Cell Resistance Measurement:

If the Beckett 7505 control is equipped with the GeniSys Display Module, part 52067U, the cad cell resistance can be selected and read on the LCD screen. Also, the GeniSys Contractor Tool, part 52082U, can be used for this purpose.

If these are not available, the cad cell leads can be unplugged from the control and the resistance measured with a meter in the conventional way. Conduct these tests with flame present.

Table 5 - 7505 Status Light Explanation Table

Light

On Continuously

Flashing

Color

 

 

Red

Restricted (Hard) Lockout

Soft Lockout

 

 

 

Green

Flame Sensed during normal

Recycle

 

operation (Could be stray light

 

 

during standby)

 

 

 

 

Yellow

Control is in Pump Prime mode

N/A

 

or Reset button currently held

 

 

for 15+ seconds.

 

 

 

 

Figure 12 - GeniSys 7505 Control with Optional Components

Reset Button

Wiring

Connections

with Red Light

 

Yellow Light

 

Green Light

 

Cad Cell

Connections

Thermostat Terminals

Communication Port 2

 

Communication Port 1

Optional Components:

Contractor’s Tool:

Hand-held device for

programming and diagnostics

Display Module: Permanent device for programming and diagnostics

Alarm Module:

For adding isolated low voltage alarm contacts to the base control. See Alarm Module Instructions for specifications.

CF2500/CF3500 Burner Manual

13

Image 13
Contents To the Homeowner or Equipment Owner Potential for Fire, Smoke and Asphyxiation HazardsContents Hazard Definitions General InformationFrozen Plumbing Water Damage Hazard Clearances Pre-installation ChecklistFuel Supply Oil Supply Pressure Control Required Electrical Supply Nozzle Pressure Correct Nozzle and Flow Rate RequiredVent System Fire, Smoke & Asphyxiation HazardAir Tube Combination Codes Verify Air TubeDust and Moisture Protect Against Dust Mount the BurnerProtect the Air Tube From Overheating Mount Flanges on Air TubeCheck Electrode Settings Maintain Electrode Specifications Install NozzleInstall Nozzle Line Assembly Mount Air Tube to BurnerInsert Burner Set Dimension ZConnect Fuel Lines Psig to Incorrect Wiring Will Result in Improper Control Operation Wire the BurnerElectrical Shock Hazard Fire or Explosion HazardCad Cell Resistance Measurement StandbyTypical Wiring 7505P Typical Burner Sequence Operation RM7897A Typical Burner Sequence of Operation RM7897A ControlDo Not Bypass Safety Controls Professional Installation Service RequiredKeep Service Access Covers Securely Installed Adjusting Plate Assembly DimensionInitial Head Position Damper Motor with Cover Initial Air SettingsStart the Burner Professional Service RequiredSet Appliance Limit Controls Prepare the Fuel Unit for Air VentingSet Low-fire Air Set High-fire AirIf burner stops during venting If burner stops after flame establishedAnnual Professional Service Required Perform Regular MaintenanceMonthly Maintenance by owner Description CF2500 Part No CF3500 Part No Replacement PartsFlange a Limited Warranty Information