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AIR BOOSTER 2
EN/10.2018/IT30I © STULZ SpA – all rights reserved
To unlock the keypad: hold down UP and DOWN keys for few seconds, until “POn” starts to flash.
Manual reset after locking alarms
If the unit is locked, press DOWN key for 3 seconds to reset the unit. It allows MANUAL UNLOCK
function (manual reset of alarms) when the unit is locked due to:
• FAN BLOCKED alarm (at least 4 events in 4 hours)
• DAMPER BLOCKED alarm
• MOTOR BLOCKED alarm
• HIGH PRESSURE alarm
5.2. Parameters
Label Description Range
Preset
value
SPt Temperature setpoint (Type 1) [LS ÷ US] 25°C
SPb Pressure setpoint (Type 2) [LSb ÷ USb] 20 Pa
LS Temperature setpoint lower limit °C [-40,0 ÷ SPt] °F [-40 ÷ SPt] 5°C
US Temperature setpoint upper limit °C [SPt ÷ 110,0] °F [SPt ÷ 230] 50°C
LSb Pressure setpoint lower limit Bar [0 ÷ SPb] PA [0 ÷ SPb] 10 Pa
USb Pressure setpoint upper limit Bar [SPb ÷ 50,0] PA [SPb ÷ 725] 80 Pa
Ctr Type of control tPr÷ PrS tPr (temperature control) ÷ PrS (pressure control) tPr
CMt Temperature control mode BAF (Air Booster Fan) ÷ BAM (Air Booster Modulator) BAF
CF Temperature unit of measurement: Celsius, Fahrenheit °C(0) - °F(1) °C
rES Resolution (only for T in °C): decimal , integer dE(0) - in(1) dE
PMU Unit of measurement of the Pressure Bar(0) - PA(1) PA
Lod Display probe selection by default
b1 = probe P1 (upper temp)
b2 = probe P2 (middle temp) / b3 = probe P3 (lower temp)
Avr = average temperature of the enabled probes
MAu = Maximum temperature value of the enabled probes
Avr
tIP Calculated temperature
b1 = probe P1 (upper temp)
b2 = probe P2 (middle temp) / b3 = probe P3 (lower temp)
Avr = average temperature of the enabled probes
MAu = Maximum temperature value of the enabled probes
Avr
HY Temperature proportional band °C [0,1÷ 25,5] °F [1 ÷ 45] 10°C
Int Integral time for the temperature adjustment 0 ÷ 999 (seconds) 0 sec
HL Temperature switch-off hysteresis °C [0,1÷ 25,5] 3°C
HP Pressure switch-off hysteresis Bar [0,1÷1,0] Pa [1 ÷ 10] 30 Pa
LAF Minimum speed with CMt = BAF 0 ÷ UAF 20%
UAF Maximum speed with CMt = BAF LAF ÷ 100 100%
LAM Lower operating limit with CMt = BAM 0 ÷ UAM 10%
UAM Upper operating limit with CMt = BAM LAM ÷ 100 100%
bPb Pressure proportional band Bar [0,1 ÷ 25,5] PA [1 ÷ 360] 20 Pa
Inb Pressure integral time 0 ÷ 999 (seconds) 0 sec
Lab Lower operating limit with Ctr = PrS 0÷UAb 10%
UAb Upper operating limit with Ctr = PrS LAb ÷100 100%
ton Delay upon start-up 0 to 255 seconds 0 sec
toF Delay upon shutdown 0 to 255 seconds 0 sec
ALL Low temperature alarm °C [-40,0 ÷ ALU] °F [-40 ÷ ALU] 5°C
ALU High temperature alarm °C [ALL ÷ 110,0] °F [ALL ÷ 230] 50°C
HLA
Low temperature alarm hysteresis
(differential for low temp alarm to be restored)
°C [0.1 ÷ 25,5] °F [1 ÷ 45] 2°C
HHA
High temperature alarm hysteresis
(differential for high temp alarm to be restored)
°C [0.1 ÷ 25,5] °F [1 ÷ 45] 2°C
ALd Temperature alarm delay (in normal mode) 0 to 255 seconds 20 sec
dAo Temperature alarm exclusion at power on 0 to 255 seconds 60 sec
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