RBI FLEXCORE CK7000 - Page 33

33
Cast Iron Condensing Boilers – Installation Manual
FlexCore Stainless Steel Condensing Boilers – Installation Manual
If Yes, do
not operate
blower.
FireTube Series "HeatNet Control" Troubleshooting (Firing the FireTube Boiler)
FireTube Control Functions
Ignition Sequence
YES
Variable Frequency
Drive
NO
J5 Pin 2
"PILOT"
YES
INPUTS:
1. MODBUS
2. AA
3.Heat Demand
4. 4-20ma
5. T1-T4
J5 Pin 3
"BLOWER"
J5 Pin 1
"MAIN"
TERM 9
"MAIN"
Hand Shake
TERM 8
"PILOT"
TERM 4
"MOTOR"
J4 Pins 4 & 8
YES
J5 Pin 10
"LIMITS"
NO
YES
Ignition Contrrol
(Honeywell S7800)
YES
J13 "CIRC"
YES
NO
J4 Pins 4 & 8
YES
Start Circulator
YES
NO
NO
NO
Close the Last
limit in the Limit
String to Ignition
Control
Have We
received the
"BLOWER"
signal?
CALL FOR
HEAT?
PRE_PURGE
Interlocks OK?
Are we below the
Temp Band?
YES, fire the boiler.
NO
Send 120 VA C
BLOWER signal
Limits OK?
Operate Blower
Motor @ ~55%
LIMITS
After 10 Seconds
send PILOT signal
BLOWER
PILOT signal? PILOT
PILOT Ignition
J4 Pins 4 & 8
Operate Blower
Motor @ ~32%
FLAME?
Operate Blower
Motor @ 0%
After 10 Seconds
send MAIN
VA LVE signal
MAIN signal?
1. Minimum fire rate
2. Hold for (x) secs.
3. Modulate to temp
MAIN
Operate Blower
Motor @ Min Fire,
then Modulate to
maintain temp
J4 Pins 4 & 8
J5, J11A,J11 B
Setpoint - 1/2
Heat Band
DISPLAY:
STANDBY
DISPLAY:
HEATING:
DISPLAY:
PRE PURGE
DISPLAY:
RUN % 25
TERM 6
"LIMITS"
DISPLAY:
PILOT:
"MAIN VA LVE"
greater than 7 VA C
Operate Blower
Motor @ 0%