Lochinvar EcoKnight EKB115CE, Инструкции по установке, пусконаладке и обслуживанию

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12.3 SEQUENCE OF OPERATION
OPERATION DISPLAY
1.
Upon a call for heat, the control turns on the appropriate
pumps (primary and secondary pumps for space heating
call; DHW pump for DHW call).
BLR: Standby
OUT: 77.4C (82)
2.
The control connects 230 VAC to the fan. The fan does
not run at this time.

If the unit is equipped with a flow switch or low
water cut-off, it must close before the control
powers up the fan.
 If the unit is equipped with a manual reset high limit
it must be closed before the control powers up the
fan.

If the unit is equipped with a gas pressure switch, it
must close at this time.

If there is an auxiliary device connected to the unit,
the unit will then provide 24 VAC to its enable relay.
If the auxiliary device has a proving switch, it must
close before the sequence continues.
BLR: Standby
OUT: 77.4C (82)
3.
The control then starts a 10 second pre-purge cycle.
BLR: PREPURGE
OUT: 77.4C (82)
4.
Once the pre-purge cycle is complete, and the blocked
drain and auto-reset high limit are closed, the control
starts the 5-second trial for ignition by sending spark
voltage to the ignition electrode and opening the gas
valve.
BLR: IGNITION
OUT: 77.4C (82)
5.
If the control does not detect flame by the end of the trial
for ignition, the control performs a 10 second postpurge.
On the EKB45CE to EKB115CE models, the control will
perform another prepurge and will try to light the burner
again. If the burner does not light after 4 trials, the control
will lockout for 1 hour and then try another set of 4 trials.
On the EKB145CE to EKB235CE models the unit will
lockout until manually reset.
BLR: POSTPURGE, PREPURGE
OUT: 77.4C (82)
6.
If the control detects a flame before the trial for ignition
ends, it begins to modulate the burner in order to maintain
the set point. If the boiler lights due to a central heating
call for heat, and the ramp delay function is active (default
is inactive), the modulation will be held to a series of
increasing limits after the burner has lit.
BLR: RUN 20% RATE
OUT: 78.8C (82)
7.
Once the call for heat is satisfied, the control will turn off
the burner. The fan will remain on for the 10-second
postpurge cycle. The pumps will continue to run for their
respective pump delay times, and then turn off.
BLR: POSTPURGE
OUT: 81.6C (82)
8.
Primary and secondary pumps switch off.
BLR: Standby
OUT: 81.6C (82)