AIRSYS UNICOOL 11V1T3 - Page 75

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Hysteresis
Super heat hysteresis
Discharge
Temperature
Control
Set point
Discharge temperature setpoint
Offset
Discharge Offset
Hysteresis
Discharge Hysteresis
Actual work model
Suction Superheat/Discharge Superheat
Suction
Superheat
Table 24: Parameters in the Alarms Menu
Menu Screen
Option
Description
Default
Alarm Input Logic
Smoke/fire
Smoke/fire alarm logic
N.C
Generator run
Generator run alarm logic
N.O
DC failover
DC failover alarm logic
N.O
Hydrogen
Hydrogen alarm logic
N.O
Alarm Output Logic
HVAC Alarm 1
HVAC 1 alarm output logic
N.O
HVAC Alarm 2
HVAC 2 alarm output logic
N.O
HVAC Alarm 3
HVAC 3 alarm output logic
N.O
High Pressure Alarm
Setpoint
High pressure alarm setpoint
594.7 psi
Diff
Pressure below setpoint at which the alarm turns
off
145 psi
Low pressure alarm
Thresh
Low pressure alarm trigger point
72.5 psi
Start delay
Alarm delay after compressor starts
30s
Running delay
Delay before alarm triggers
10s
Low out delay
Delay before alarm triggers again
60s
Lim. thresh.
Low pressure at which compressor steps
58 psi
Lim. hyst.
Low pressure alarm hysteresis
29 psi
Supply fan ovld.
alarm
Start delay
Alarm delay after supply fan start
20s
Running delay
Delay before alarm triggers
10s
Dust detect alarm
Delay time
Delay before alarm triggers
60s
Retry wait time
Time between dust checks
1 min
Auto reset time
Alarm will reset if no protection events occur in
this interval
1 h
High Supply Temp
Alarm
Thresh
Temperature above set point at which alarm
triggers
5.4°F
Start delay
Alarm delay after supply fan start
1 min
Running delay
Delay before alarm triggers
60s
Damper alarm
Comp. off DT
Alarm delay after compressor stop
5 min
Close diff
Maximum temperature differential between
room and supply temperature when damper is
closed
16.2°F
Open diff
Maximum temperature differential between
outdoor and supply temperature when damper is
open
6.5°F
Diff. check T
Time differential between temperature checks
5 min
Retry time
Time allowed for temperature checks. Alarm will
trigger if “Retry number” is exceeded in this
interval
60 min
Retry number
Number of checks before alarms
3