Download Model 8680 SureFlow Adaptive Offset Controller Operation

SETPOINTS MENU (continued)
SOFTWARE
NAME
MIN EXH
SET
MINIMUM
EXHAUST FLOW
SET POINT
ITEM DESCRIPTION
The MIN EXH SET item sets the minimum general exhaust air flow
out of the laboratory. The controller will not allow the general exhaust
air damper to close further than the MIN EXH SET flow set point.
NOTE: This item requires a TSI compatible flow station and control
damper to be mounted in the general exhaust duct.
ITEM RANGE
DEFAULT (bold)
Pressure based flow
stations 0 - 2832
ft/min (0 - 14.4 m/s) x
duct area in square
feet (ft2): square
meters (m2).
Linear based flow
stations 0 to TOP
VELOCITY times the
duct area in square
feet (ft2): square
meters (m2).
0
TEMP LOW
TEMPERATURE
COOLING
The TEMP LOW item determines when the supply air changes from
ventilation control mode (VENT MIN SET) to cooling temperature
control mode (TEMP MIN SET).
Off, 0-10 VDC.
Off
When the thermostat signal drops below the TEMP LOW voltage set
point, the TEMP MIN SET is the supply air minimum (VENT MIN
SET is overruled). Zero volts equates to maximum cooling.
WIRING: The thermostat is connected to the temp input (pins 23 &
24, DIM). The 0-5 or 0-10 VDC thermostat signal is
continuously monitored by the AOC.
TEMP HIGH
TEMPERATURE
HEATING
The TEMP HIGH determines when the supply air changes from
ventilation control mode (VENT MIN SET) to temperature heating
mode (TEMP MIN SET).
Off, 0-10 VDC
Off
When the thermostat signal is greater than the TEMP HIGH voltage
set point, the TEMP MIN SET is the supply air minimum (VENT
MIN SET is overruled). If TEMP HIGH is programmed to be off, the
supply air remains in ventilation mode when heating is required.
5 (0-5 VDC) or 10 volts equates to maximum heating.
WIRING: The thermostat is connected to the temp input (pins 23 &
24, DIM). The 0-5 or 0-10 VDC thermostat signal is
continuously monitored by the AOC.
MIN OFFSET
MINIMUM
FLOW OFFSET
The MIN OFFSET item sets the minimum air flow offset between
total exhaust flow (fume hood, general exhaust, other exhaust) and
total supply flow.
Technical Section
- 10,000 to 10,000
CFM
0
15