
Section: Wire the Burner
Figure 11 - Typical Burner Sequence of Operation - 7505
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5
Ignition
Carryover
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| Run |
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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 | |||
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Red | Restricted (Hard) Lockout | Soft Lockout | |
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Green | Flame Sensed during normal | Recycle | |
| operation (Could be stray light |
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Yellow | Control is in Pump Prime mode | N/A | |
| or Reset button currently held |
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| for 15+ seconds. |
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Figure 12 - GeniSys 7505 Control with Optional Components
Reset Button | Wiring | |
Connections | ||
with Red Light | ||
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Yellow Light |
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Green Light |
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Cad Cell
Connections
Thermostat Terminals | Communication Port 2 |
| Communication Port 1 |
Optional Components:
Contractor’s Tool:
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 |