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SET POINTS MENU
MENU ITEM
SOFTWARE
NAME
ITEM DESCRIPTION
ITEM RANGE
DEFAULT
VALUE
PRESSURE SET
POINT
SET POINT
The
SET POINT
item sets the pressure control set point. The
S
URE
F
LOW
controller will maintain this set point, negative or
positive, under normal operating conditions.
Pressure differential is not maintained by direct pressure control;
i.e., modulating dampers in response to pressure changes. The
pressure signal is an AOC input that is used to calculate the
required air flow offset value. The calculated offset value
changes the supply (or exhaust) flow volume which changes the
pressure differential. When the calculated offset value is between
the
MIN
OFFSET
and
MAX OFFSET
, room pressure control
can be maintained. If the offset required to maintain pressure is
less than the
MIN OFFSET
or greater than
MAX OFFSET
,
pressure control will not be maintained.
0 to -0.19000 in. H
2
O or
0 to +0.19000 H
2
O
-0.00100” H
2
O
REMOTE OR
ALTERNATE
PRESSURE SET
POINT
REM SET
POINT
The
REM SET POINT
item sets an alternate control set point.
The S
URE
F
LOW
controller will maintain the room pressure at the
alternate set point when this item is enabled.
This item is enabled when the REMOTE SWT contact closure,
pins 3 and 4, is closed, or the RS 485 communications sends a
command.
NOTE
: The
REM SET POINT
disables the
ALARM DELAY.
0 to -0.19000 in. H
2
O or
0 to +0.19000 in. H
2
O
0
VENTILATION
MINIMUM
SUPPLY FLOW
SET POINT
VENT MIN
SET
The
VENT MIN SET
item sets the ventilation supply airflow set
point. This item provides a minimum supply air flow to meet the
ventilation requirement, by preventing the supply flow from
going below the preset minimum flow.
The controller will not allow the supply air damper to be closed
further than the
VENT MIN SET
set point. If room pressure is
not maintained at minimum supply flow, the general exhaust
damper modulates open until pressure set point is reached
(provided offset is between
MIN OFFSET
and
MAX OFFSET)
.
0-30,000 CFM
(0-14,100 l/s)
Linear based flow
stations 0 to
TOP
VELOCITY
times the
duct area in square feet
(ft
2
): square meters (m
2
).
0
