3.1.1
Single Servo Burner Set up
In order to drive the servo motor to the purge and start positions and to allow a load sensor to take over control once
firing, the outputs and inputs used in Flame Safeguard Mode are as follows:
Outputs:
• T70 (Switched Neutral) is the High/Low Initiate output.
• T71 (Switched Neutral) is the Release to Modulate output.
o When T71 is low, and T70 is High, the motor moves to Purge.
o When T71 is Low and T70 is Low, the motor moves to Light Off.
o When T71 is High, the Motor releases to Modulate via the external Pressure sensor.
Inputs:
• Input T80 is the Low/Fire Start Switch, which is made when the motor start position mechanical switch has
been made.
• Input T81 is the High Fire/Purge Switch, which is made when the motor purge position mechanical switch
has been made.
The wiring is to be completed as shown in the schematic in section 1.2.1. The Relay Box (SP80070, SP80070/110)
is available from Autoflame to provide all the correct connections for ease of installation. If using other relays, ensure
that you conform to the wiring schematic provided.
3.1.2
On/Off Burner Set up
With a simple On/Off burner, The wiring is simplified to provide the following outputs and inputs:
Outputs:
• T70 (Switched Neutral) is the High/Low Initiate output. This starts a timer relay when high to initiate the purge
sequence after a short delay and confirms the start position when it goes low.
Inputs:
• T80 is the Low/Fire Start Switch, which is made when the timer relay is driven low.
• T81 is the High Fire/Purge Switch, which is made after a delay of 5 seconds when the timer relay is driven
high.
The wiring is to be completed as shown in the schematic in section 1.2.2. A simple ON-delay timer relay such as
Allen-Bradley 700-FEA6TU23 or 700-FEM6TU23 set in mode (A) with a 5 second delay is required.
3.1.3
Wiring Checks
Important Note: Do not wire these outputs to a servo, since driving a servo in both directions at the same time would
result in damage and must be avoided.
On a newly installed system the following procedures should be carried out as listed:
1. Check all interconnecting wiring between the Flame Safeguard unit and external components is correct.
2. Set the options and parameters required (refer to sections 2.1 and 2.2).
Improper use may result in property damage, serious physical injury or death.
The configuring procedure as described must be strictly adhered to. Anybody configuring a
flame safeguard system must have an adequate understanding of combustion plant. In the
wrong hands hazardous conditions could be made to exist. The Autoflame products must only
be installed, set up, commissioned and adjusted by an Autoflame certified technical engineer.
Please make sure that you fully read and understand the safety notes section before starting the
configuration process.
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