OSAKA - USER MANUAL - B4U - v2 - PAG. 8
The output configured in this way can be turned off automatically after
a certain time programmable in the "tA" parameter. With "tA" = oF,
the output is activated and deactivated manually using the DOWN
key, otherwise, the output, once activated, will automatically
deactivate after the programmed time.
The "Bu" parameter also allows the internal buzzer to be configured:
= oF - The buzzer is deactivated
= 1 - The buzzer is activated only to signal alarms
= 2 - The buzzer is activated briefly only to signal keypad tampering
(does not signal alarms)
= 3 - The buzzer is activated to signal alarms (with continuous sound)
and keypad tampering.
= 4 - The buzzer is activated to signal alarms (with intermittent sound)
and keypad tampering.
5.6 - TEMPERATURE REGULATION
The parameters related to the temperature control functions are
found in the "-rE" folder.
The B4U temperature control is ON / OFF and acts on the outputs
configured as "ot" and "HE" depending on the measurement of the
Pr1 probe, the active Set Point "S1" (or "SE", " SH "), the control
differential" d "(or" Ed "," Hd ") and the operating mode of the" HC
"parameter.
By means of the "HC" parameter it is possible to obtain the following
functions:
= C (Cooling) or = H (Heating)
Relative to the operating mode programmed in the "HC" parameter,
the equipment automatically considers the differential with a positive
value for a Refrigeration control ("HC" = C) or with a negative value
for the Heating control ("HC" = H). .
= nr (NEUTRAL ZONE)
In the case of programming the parameter "HC" = nr, the output
configured as "ot" works with cooling action (as "HC" = C) while the
output configured as "HE" works with heating action.
In this case, the regulation on the outputs can be done through the
desired active Set Point "S1", "S2", "S3", "SE", "SH" and the
regulation differential ("d" or "Ed" or "Hd") and the B4U automatically
considers the cooling action with a positive value and the heating
action with a negative value.
= HC (COOLING AND HEATING WITH 2 INDEPENDENT SET
POINTS)
If the parameter "HC" = HC is programmed, the output configured as
"ot" works with Cooling action (as "HC" = C) while the output
configured as "HE" works with Heating action.
In this case, the regulation Set point for the "ot" output will be "SP",
"SE", "SH" while for the "HE" output it is through the Set "SH".
The regulation differential for the "ot" output is the active one between
"d" or "Ed" or "Hd" is assumed automatically by the B4U to have
positive values in the cooling action while for the "HE" output the
differential will be "Hd" considered with negative values during the
heating action.
In this mode, the activation of the TURBO cycle makes the B4U work
with the Neutral Zone and the Set Point SH.
= C3 (Cooling with three automatic modes)
The B4U always works in cooling mode since this programming
activates the automatic switching of the three Normal-Economic-
Turbo modes.
All the types of protections described in the parameters (P1, P2, P3)
always act through the output configured as "ot".
In the event of a probe error, it is possible to make the output
configured as "ot" continue to operate cyclically according to the time
programmed in parameter "t1" (activation time) and "t2" (deactivation
time). When a Pr1 probe error occurs, the B4U proceeds to activate
the "ot" output during time "t1" and deactivate it through time "t2", as
long as the error remains. When programming "t1" = oF, the output
in probe error conditions will be deactivated. Programming "t1" in any
value and "t2" = oF, the output in probe error conditions will always
be active.
It is recalled that the operation of the B4U through digital inputs can
be configured as follows: "Compressor protection and start delay",
"defrost", "open door" and "external alarm with output lock".
5.7 - COMPRESSOR PROTECTION FUNCTIONS AND START-UP
DELAY
The parameters related to the compressor protection functions are
available in the "-Pr" folder.
The compressor protection function helps to avoid very frequent
starts of the compressor or it can also be useful to carry out a control
in time for the relay output destined to an actuator or load.
This function allows you to program 3 types of timing in the activation
of the output configured as "ot" as appropriate to the regulation
system.
The protection consists of preventing several starts during the
protection time.
1 - First control (Parameter P1). The first time foresees a delay in the
activation of the output "ot" according to the time programmed in the
parameter "P1" (start-up delay).
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