Heat Pump, Split System, Single Service, 3 phase
88
Maintenance
Document
1394-1
Dewpoint Monitoring
Line no.
Programming line
946
Lock time dewpoint limiter
947
Flow temp setp incr hygro
948
Flow setp incr start at r.h.
950
Flow temp diff. dewpoint
These settings are useful only when a dewpoint
sensor (hygrostat). is used.
Lock time dewpoint limiter
As soon as the dewpoint sensor detects
condensation, it closes its contact and switches off
the cooling process. When the contact reopens the
"dewpoint sensor lock time" period begins. Cooling
will resume only after this time period has elapsed.
The dewpoint sensor must be assigned to input H2
as "Dewpoint sensor".
Flow temp setp incr hygro
To avoid condensation due to an excessively high
humidity level in the room, a fixed increase in flow
temperature can be obtained by means of a
hygrostat. As soon as the humidity exceeds the value
set on the hygrostat, the hygrostat closes its contact
and activates the flow temperature increase defined
here.
The hygrostat must be assigned to an Hx input as
"Flow temp setpoint increase by hygrostat".
Flow setp incr start at r.h.
To avoid condensation caused by an excessively
high humidity level in the room, a gradual increase in
flow temperature can be performed by means of a
humidity measurement 0... 10 V.
If the room's relative humidity exceeds the value
"Beginning of flow temp increase at relative humidity",
the flow setpoint is gradually increased. The increase
beginning (line 948) and the maximum increase (line
947) can be adjusted.
The humidity sensor must be assigned to an H2 input
as "room relative humidity 10V".
Flow temp diff. dewpoint
The relative humidity of the ambient air and the
corresponding room temperature are used to
compute the dewpoint temperature.
To prevent condensation forming on the surfaces, the
value adjustable on line 950 determines the lower
limit of the flow temperature above the dewpoint
temperature.
This function can be deactivated with the setting
- - -
.
The humidity sensor must be assigned to an H2 input
as "Room relative humid. 10V" and a room
temperature sensor is required (input H2 as "Room
temperature 10V" or "room unit").
948
100%
947
Relative
humidity
Flow temp setpoint
increase
Summary of Contents for WATERSTAGE 112
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