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FLAME DETECTOR CHECKOUT
The performance of the relay depends upon how well the
flame detector is installed. For guidance on how to properly
install a flame detector, consult the burner/boiler
manufacturer's instructions and the information packed with
the detector.
Flame current check
The test jack on the face of the relay allows the value of the
flame current to be easily measured. Use a Honeywell W136A
micro ammeter (or equivalent), which has a plug for insertion
into the test jack socket.
The expected maximum and minimum values of flame current
for the various types of flame detectors are given in the table
below together with hints on what to check if the current is
unsteady or weak.
Note that the following have an influence on flame detector
performance.
(1) Position, size and burning characteristics of the flame.
(2) Ambient temperature at the detector (except flame rod).
See detector instruction sheet.
(3) Refractory - When refractory temperature exceeds
°
°
1370
C12500
F, some ultra-violet radiation may occur.
Lower refractory temperatures may affect photocells;
see relevant data sheets.
(4) Temperatures of sensor
Flame rods: ensure suitable rod.
Other sensors: see relevant data sheets.
Securing screw
Test jack
socket
LED ON =
flame present
52
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F
* Indicates a marginal installation, a defect in the circuit or
** Do not permit signal to exceed 5µA as it could shorten
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MU2C-0028Z20 R1103
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