VTS Medical Systems VENTUS COMPACT VVS021c Instructions For Use Manual page 95

Compact air handling units
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A21
A22
A23
A24
A25
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OIMM VENTUS COMPACT - ver. 6.0.0 (06.2024)
"Threshold" - supply air temperature (sensor
B1) below which the alarm is activated (A225)
"Delay" - the length of time the supply air
temperature must be too low to trigger an alarm
"Stop fans when alarm active" - stop the fans
when an alarm occurs
"HEATING - value for 0%" - control voltage of
the reverse heating function for 0% controller
override (scaled in %, where 0-100% => 0-10V)
"HEATING - value for 100%" - control voltage
of the reverse heating function for 100% control
of the controller
"COOLING - value for 0%" - control voltage of
the reverse cooling function for 0% controller
override
"COOLING - value for 100%" - control voltage
of the reverse cooling function for 100%
controller override
"Permission of operation from outside
temperature" - External temperature (sensor
B3), above which reverse operation is possible
"Permanent pre-heat activation" - activation
for AHU with water heater of the anti-FROST
sequence (screen A20) every time the AHU is
started, regardless of the outside temperature
"Minimum heating opening" - the minimum
value of the PID controller of the heater with
which it can operate during the anti-FROST
sequence for the active function of permanent
pre-heat opening
[switching on pre-heat permanently is desirable
in
cases where the outdoor
measurement may not reflect actual conditions -
e.g. in suspended AHUs where sensor B3 is
located inside the building].
"DI alarm delay" - time for which activation
of the digital input responsible for the
electric main heater alarm must occur in
order to trigger an alarm (A246 - for electric
heaters with dedicated VTS Control, the
alarm source is a pressure switch and
thermostat connected in series)
"Supply fan shutdown delay" - delay time
for the supply fans to shut down after the
AHU is switched off to cool the electric
heater (blowdown)
temperature
95

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