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,
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 heat-
ing cycle, returns to idle and waits for temperature to
drop again,
4. Circulator is turned on throughout "Call for Heat."
Circulator
Wait for pressure switch Inducer is off. Control waits for pressure switch to open.
2 to open Checked at beginning of heat cycle before turning on inducer.
If pressure switch does not open in 60 seconds, control goes to State 11.
Inducer is turned on. Control waits for pressure switch to close.
Wait for pressure switch
3 Checked at beginning of heat cycle after turning on inducer,
Flame signal is being established, Variation in signal is allowed during this state,
7 Flame stabilization
flame must be stable at end of period
8 Running System is running, Flame signal must be present.
9 Post-Purge System is purging at end of call for heat
....... ............................................................................................................ is called before retry: .........................................................................................................................
10
Recycle delay Flame signal was lost, and delay is called before retry
Wait for pressure switch Inducer is still off, Pressure switch has not opened at beginning of heat cycle.
11
to open - failed to close
Wait for pressure switch Inducer is on, Pressure switch has not closed at beginning of heat cycle,
12
to close - failed to open Alarm message is sent but no lockout occurs,
13 Soft lock-out Soft lockout duration is one hour, may override with manual reset.
14 Hard lock-out Manual reset is required for hard lockout
..................................................................................................................................................................p b! sta € ..............................................................................................................................................................................................................................................................
Flame signal sensed before trial for ignition. Appropriate alarm is sent.
OR
16 Flame out of sequence Flame signal sensed during post purge, Appropriate alarm is sent.
OR
.......................................................................................................................................................................................................................................................................................................................................................................................F s!gnal pre eXpect A ........................................................................................................................
...... ,^_,._^^ ._..... :^_ Self check performed at start up, again at beginning of heat cycle, and during
CLItt_tlL _clt'_dbJ_ LI_:L_:L,,L Utl ,, _;_ t_- n ....... ",', ¢'_4-_
17 WdJLJuTr_cuv_Jy aL_L_.
Self check performed at start up, again at beginning of heat cycle, and during
Wait for recovery