Edge [ii] Controller Operation Manual
SECTION 6
– ADVANCED SETUP
OMM-139_E
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134
of
196
•
SH & DHW Proportional Band
: Generates a fire rate based on the error that
exists between the setpoint temperature and the actual outlet temperature. If the
difference is less than the value of these parameters, the fire rate will be less than
100%. If the error is equal to or greater than the value of these parameters, the fire
rate will be 100%. (Range: 1°F to 120°F)
•
SH & DHW Integral Band
: Specifies the fraction of the output, due to setpoint
error, to add or subtract from the output each minute to move towards the setpoint.
(Range: 0.00 to 2.00)
•
SH & DHW Derivative Band
: This value responds to the rate of change of the
setpoint error. This is the time that this action advances the output.
(Range: 0.0 to 2.0 min.)
•
Cascade Deadband Hi & Lo
: These parameters define a temperature range
within which the plant Outlet Temperature can drift above and below the Setpoint.
(Range: 0 to 25°F)
•
SH, DHW, Other, Other SH PRI & Other DHW PRI Hi Limit
(the options that
appear depend on the Application chosen in
The highest temperature for each Application the plant will meet.
(Range: 40 to 210°F)
Valve Configuration
The Valve Configuration screen contains parameters necessary for communicating with and
controlling the external sequencing valves on the boilers in a BST cascade.
NOTE
:
This screen is available only after BST Cascade functionality has been enabled (see the
Unit Mode
parameter in
). If the unit is configured as
a
BST Manager
, the parameters apply to this unit and all
BST Client
units. If the unit is
configured as a
BST Client
, the parameters configured on the
BST Manager
will take
precedence.
1. Go to:
Main Menu
→
Advanced Setup
→
BST Cascade
→
Operating Controls
→
Valve
Configuration
.
SELECT OUTPUT = CASCADE VALVE
SELECT OUTPUT = Aout 2
Figure 6.3.4.4: Operating Controls: Valve Configuration Screen