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LAG DELAY
Adjustable from 0min to 60min
Button: MENU/<System Settings>/<More Settings>/
<Modulating Settings>/Lag Delay
•
The Lag Delay requires the lead stage to remain at 100% modulation for the full period
of the Lag Delay before the lag stage can be activated. For example, if the Lag Delay
was set to 10 minutes, the Lead Stage must remain at 100% modulation for the full ten
minutes before the lag stage could be activated. The Message Display Line will display
Lag Delay and the remaining time.
•
Set the Lag Delay to 0 min when two or more Stages will generally be needed to hold the load.
•
The Lag Delay is useful in installations where one unit should usually have enough output
to hold the load unless it fails or load conditions become extreme.
•
The Lag Delay overrides the Modulation Start % selected for each stage. Regardless of that
setting, the previous stage must reach and stay at 100% before the lag stage can be activated.
•
The full Lag Delay must always elapse regardless of what happens to system temperature.
Therefore, set the Lag Delay to 0 min if the object is to achieve a smooth operation and
set point control using multiple units.
•
Note that if Parallel was selected as the Modulation Mode (See "MODULATING MODE"
on page 23), this value must be set to 0 minutes to avoid having the lead boiler going to
100% modulation prior to firing the lag boiler.
SOFT-OFF DELAY
Adjustable from 0sec to 60sec
Button: MENU/<System Settings>/<More Settings>/
<Modulating Settings>/Soft-Off Delay
•
When a stage is no longer needed, the Soft-Off keeps that stage burner in Low Fire prior
to turning it off.
•
The display will show a percent that is equal to the Ignition % for the stage in Soft-Off
delay. That number will blink for the Soft-Off delay period.
•
If during the Soft-Off delay period the Mini-MOD-CNC needed that stage to turn back
on, the stage will be released from the Soft-Off delay and resume normal operation.
•
On a Shutdown initiation or Tstat termination any stage that was on will go into Soft-Off
delay before fully turning off.
WARNING
When using Soft-Off and Last Stage Hold, the last boiler stage will not turn off
until both parameters have elapsed. In this case, Soft-Off will start after the Last
Stage Hold.
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36
HEAT-TIMER CORP.
14 OPERATING MENU SEQUENCE
Default: 0min
BACK
Default: 45sec
BACK
LAG DELAY
0 min
SAVE
SOFT-OFF DELAY
45 sec
SAVE
059102-00 REV. C
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