Two-Stage-Controlled Burner - Honeywell BCU 460 Technical Information

Application

1 .1 .5 Two-stage-controlled burner

Process control (PCC)
FCU 500 PLC
P
HT
3 6 35
60 61 62 65
VAS
Control:
ON/OFF or High/Low
The BCU provides the cooling and purging processes.
Parameter A078 = 4 is selected so that the two-stage
burner starts at low-fire rate. When the operating state
BCU 460, BCU 465 · Edition 11.19
A
Start 1
1 2 4
81
82
µC
95
96
BCU 460
22
LM..F3
V3
VAS 1
V1 V2
VAG
VR..L
is reached, the BCU advises the control unit. Depend-
ing on the parameter setting, the air valve on terminal
65 is actuated to open and close by the program or ex-
ternally via the input at terminal 4.
12