Operation - ECR International PENNCO 15B III Series Installation, Operation & Maintenance Manual

A.5 Operation
Module continuously monitors boiler water temperature and
fires or shuts off burner based on this temperature data.
1.
When "Call for Heat" occurs, control enables circulator
and monitors boiler water temperature to determine
whether thermostat can be satisfied without firing
burners.
State
Code Definition
Number
1
Circulator
Pre-purge
4
Spark
6
Flame stabilization
7
Running
8
Post-Purge
9
10
Retry Recycle Delay
Soft lock-out
13
Hard lock-out
14
Wait for limit to close
15
Flame out of sequence
16
Pilot valve diagnostics
Current leakage detection
17
Wait for recovery
Wait for damper to open
18
Wait for damper to close
19
Wait for damper to open
20
(Failed close)
Wait for damper to close
21
(Failed open)
APPENDIX A - CONTROL MODULE
Table 6 - Operation State Codes
Idle
Standby - no call for heat
or
Heat request present. Boiler temperature sufficiently high to run circulator pump
only.
System is purging before ignition trial; includes Pilot Valve circuit diagnostics.
System sparking. Flame is not present.
Flame signal is being established. Variation in signal is allowed during this state,
flame must be stable at end of period
System is running. Flame signal must be present.
System is purging at end of call for heat
Successful ignition was not detected, and delay is called before retry.
Flame signal was lost during state 7 or 8, and delay is called before retry (32
second delay)
Soft lockout duration is one hour, may override with manual reset.
Manual reset is required for hard lockout
Possible thermostat call for heat; limit switch is open.
Flame signal sensed before trial for ignition. Appropriate alarm is sent.
OR
Flame signal sensed out of sequence during post purge. Appropriate alarm is
sent.
Flame signal present when not expected. Appropriate alarm is sent.
Pilot valve circuitry diagnostics during pre-purge.
Self check performed at start up, again at beginning of heat cycle, and during
"Wait for Recovery " State.
Self check performed at start up, again at beginning of heat cycle, and during
"Wait for Recovery " State
Control has signaled damper/pressure switch
to close, and is waiting for completion.
If damper/pressure switch does not close within 60 seconds, control goes to
State 20.
Damper is closed and control waits for damper to open.
Checked at beginning of heat cycle before opening damper.
If damper does not open in 60 seconds, control goes to State 21.
Damper has not opened (end switch not closed) at beginning of heat cycle.
Alarm message is sent, control is NOT in lockout.
Damper has not closed despite actuator de-energized.
Alarm message is sent, control is NOT in lockout.
2. Control determines burner operation is required,
module proceeds to start burner (see state codes list)
and heats water in boiler until setpoint temperature is
achieved or thermostat is satisfied. .
3. Burner is de-activated, ignition module completes
heating cycle, returns to idle and waits for temperature
to drop again.
4. Circulator is turned on throughout "Call for Heat."
Explanation
OR
25