Edge [ii] Controller Operation Manual
SECTION 6
– ADVANCED SETUP
OMM-139_E
• 8/25/2020 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page
166
of
196
•
Skip Range Cntr
,
Skip Range Span
,
Skip Speed
: Together, these three
parameters can be used to define a Fire Rate
“skip zone” the Controller will avoid (
Skip
Range Cntr
= the center of the range). These can be used in the rare instance when a
unit emits an objectionable noise at a certain Fire Rate and no other remedy resolves the
problem. The Controller will then skip-over the
“skip” Fire Rate.
Anti-Cycling Controls
The
Anti-Cycling Controls
screen provides parameters that can be used to reduce
unnecessary cycling on this unit only.
1. Go to:
Main Menu
→
Advanced Setup
→
Performance
→
Fire Control
→
Anti-Cycling
Controls
.
Figure 6.6.3.4: Fire Control: Standalone Anti-Cycling Controls
2. The following anti-cycling parameters are available, which can be used to delay the
shutdown of a boiler in order to reduce excessive cycling:
•
On Delay
: Specifies the minimum length of time a unit must stay
off
after shutting
down or going into standby. (Range: 0 to 600 sec.)
•
Slow Shutdown
: Enable/Disable the slowdown of unit shut down when
Off Delay
threshold is achieved. If Enabled, the following additional parameters appear:
o
Off Delay
: Defines a Shutoff delay, during which the unit remains at minimum
fire rate after the unit has sequenced to shutoff. It is activated only when
Off
Delay Threshold
is reached. (Range: 0 to 9999 secs, Default = 1 min.)
o
Off Delay Threshold
: Fire rate that activates
Off Delay
function
(Range: 40 to 100 %, default = 60%).
•
Shutoff Delay Temp
: Specifies the number of degree above setpoint which the
outlet temperature can rise without triggering a unit shut down (Range: 0 to 25°F).
•
Demand Offset
: This parameter reduces excessive ON/OFF cycling in AUTO
mode. When this entry
≠
0, the unit will not turn on again until
Valve Position In
reaches the
Start Level
value
AND
the outlet temperature goes below
Demand
Offset.
In addition, the boiler will fire at the ignition Valve Position level or below for a
period of one minute. When this entry is set to zero, the unit will turn on again as soon
as the
Valve Position In
reaches the
Start Level
value. There will not be a one-
minute delay when firing at the 29% valve position level.