User manual - ATR121 - 25
co. f
Cooling fluid type
P.b.m t. c.2
Ai r
Air
1.00
10
oi L
Oil
1.25
4
H2o
Water
2.50
2
9
Dead band function
The dead band function (enabled selecting
F. b . M
on par. 28
FN c
) creates a band within which the relays are both open or
closed.
In heating functioning (par.
reG.
selected on
Hea
), the
intervention threshold of the alarm relay will be SET1 - SET2
(with hyseresis selected on par.
sYc
) while the intervention
threshold of the command relay will be SET1 + SET2 (the
hysteresis is always
sYc
).
A band is created within which the relays are both open and
where the alarm relay operates above while the command
relay operates under the band limit.
In cooling functioning (par. reG. selected on
co o r
) the
intervention thresholds of the two relays are reversed.
Temp.
Set1
Set2
Set2
Processo
Process
Isteresi
Hysteresis
Isteresi
Hysteresis
Tempo
Time
Zona intervento relè allarme
Operating zone alarm Relay
Zona intervento relè comando
Operating zone comand Relay
When this function is active, standard alarm operation (band,
deviation, etc..) is inhibited.
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