Bosch TW Series - SEQUENCE OF OPERATION FLOW

12 | Sequence of Operation flow TW Series Water to Water
TW Series Water to Water6720220047 (2016/02) Subject to change without prior notice
SEQUENCE OF OPERATION FLOW
Figure # 8
CC
LOCKOUT CAN BE SET
TO 4 VIA DIP SWITCH
BLINK CODE ON STATUS LED
SOFT LOCKOUT
RECORD ALARM
START COUNTER (IF APPLICABLE)
CC OUTPUT = ON
NO
YES
LPC
=CLOSED
FRZ >TEMP
LIMIT
Y1 = ON
TIME > 30
SEC
CON > 0
POWER/ SWITCHES/SENSOR
STATUS CHECK
START
TIMER
NO
YES
NO
YES
NO
YES
T > ASC OR
RS SEC
YES
NO
NO
YES
START
ANTI SHORT CYCLE
INITIAL
POWER UP
YES
NO
START
RANDOM START UP
START
COUNTER
NEEDED?
YES
COUNT = 2
OR
COUNT = 4
BLINK CODE ON STATUS LED
DISPLAY OUTPUT = PULSE
ALR OUTPUT = ON/PULSE
NO
YES
HARD
LOCKOUT?
CC OUTPUT = OFF
V > 18VAC
NO
YES
YES
NO
BLINK CODE
ON STATUS LED
NO
RESET ON
Y
CLEAR FAULTS
R = 24VAC
NO
YES
NO
YES
NO
YES
HPC =
CLOSED
RESET ON R
CC OUPUT=
ON
NO
YES
TIME >
120 SEC
START
TIMER
NO
YES
CNT = CNT+1