Wacker Neuson HI750 Series, Operator'S Manual, Page: 60 / 144

ghi_tx001258gb_FM10.fm
60
Operation HI750
4.26 Operating States of the Beckett Burner Controller
Burner states The burner control has several states that it sequences through during normal
operation. These operating states are described below.
.
WARNING
Fire, explosion, asphyxiation, and burn hazards.
►
Refer to the burner manufacturer’s documentation for safe operating
procedures.
wc_gr007665
Yellow
pump prime
Green
flame / recycle
Red
reset button / lockout
Standby Run
Ignition
carryover
State
10 30
Operating
wc_gr007662
State Action or Function
Standby
As soon as power is supplied to the burner control, the burner control
enters the standby state until there is a call for heat, or power is
disconnected.
Valve-on-
delay
(pre-time)
When the setpoint of the temperature controller is set to a temperature
higher than that of the heat transfer fluid, the output contacts of the
temperature controller close, completing a circuit between the two
terminals labeled “T” of the burner control. This is the call for heat. The
burner control enters the valve-on-delay state.
The valve-on-delay state lasts 15 seconds. During this state:
■
Power is sent to the burner motor.
■
Power is sent to the electrodes.
■
If the cad cell detects flame anytime during the valve-on-delay state,
the burner control goes into the lockout state.