Timberline Binar-5B-Compact - Replacement of the Control Unit

14
The CU (Fig. 8) performs the
following functions:
1. Initial diagnostics (functional check)
of pre-heater units at startup.
2. Functional diagnostics of pre-heater
units during operation.
3. Sending information to the control
panel.
4. Pre-heater startup.
5. Pre-heater shutdown:
- Following a signal from the
panel, after a set time period
- Upon failure of one of the
controlled units
- Upon exceeding allowable
limits of the temperature
and voltage
- Upon ame blow off in the
combustion chamber
While troubleshooting the control unit,
rst ensure all parts of the pre-heater,
as well as the control panel, are in
working order. If the pre-heater works
faultlessly after the replacement of the
control unit, the one removed must be
deemed faulty and should be replaced.
To dismount the control unit:
• Disconnect the control unit
connectors from the harness
• Disconnect the air blower socket
• Remove the screws fastening
the control unit to the air
blower housing
• Disconnect the plug wires from the
control unit
• Disconnect the FD wires from the
control unit
• Remove the fastening clamp of the
temperature sensors
• Remove the control unit
Reinstall the control unit in the
reverse order.
5.5 Purpose, Dismounting, and Replacement of the Control Unit
1.
2.
5.
3.
4.
Fig. 8. Control unit
1. Plug Connection Sockets
2. Flame Detector Sockets
3. Air Blower Sockets
4. Clamp
5. Temperature Sensors