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Building Technologies Division
CC1N7451en
20.11.2017
Function (cont'd)
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Burner control must be reset
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Sequence switch must be in its start position
voltage at terminals 4 and 11 present
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Air
damper
closed
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End switch «z» for the «CLOSED» position must feed voltage from terminal 11 to
terminal 8
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The contacts of control thermostat or pressurestat «W» and other contacts of
switching devices connected between terminal 12 and «LP» must be closed
e.g.
control contact for the oil preheater’s temperature
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Terminal 4 must be live
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The N.C. contact of the air pressure switch must be closed
«LP» test
Preconditions for burner
startup
