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POOL UNITS – description of control
Set the time schedule for the day of the week
Warning: In the time mode, the first basic power stage must
be set: ÚsporSt1; KomfortSt1 !
Additional performance levels are activated automatically
according to the actual and desired values of temperature
and air humidity in the ventilated space. We have to make
the settings separately for each day of the week.
HVAC components control
Regulation of individual components (mixing, water heating,
etc.) is based on the standard HVAC control. However, for
a pool unit there are some differences that are described
below:
Mixing damper and inlet/outlet damper
n
The dampers are continuously controlled according to
the temperature requirement. Furthermore, the position is
affected by the requirement for humidity. The mixing valve
may no longer be coupled with the inlet / outlet dampers.
n
Their mutual functions may be different in some situations
for pool units. For example, when the plate heat recovery is
active (pool units with integrated cooling).
n
Extreme temperature protection - at an outside tempera-
ture of T <-10 ° C, the maximum amount of fresh air is limited
to 40%. This ensures greater control stability. Settings and
signaling see data. mixing points.
Circulating damper
n
Enabled in economy mode heating or dehumidification
stage 1. If the circulation damper is open, the inlet and outlet
valves are closed. The outdoor unit does not supply outside air
and 100% circulates it. The mixing valve is further regulated
according to temperature and humidity.
Heat Pump
n
Activated and continuously controlled on request from
temperature control. However, during circulation, it is not
controlled by temperature but is activated based on the
requirement of humidity control.
n
Restriction of operation: Heat pump operation is blocked
if one of these situations occurs:
1.
outdoor temperature is out of set limits
2.
the pressure differential on the heat exchanger
is out of range ∆P
– ∆P
min
To set all parameters, see list of data points.
Plate Heat Exchanger
n
Power regulation is ensured by continuous bypass control.
Pro-Vapor Pool Unit (Units without Integrated Heat Pump).
Anti-freeze protection – standard (for the plate heat
exchanger without integrated mixing):
Intervention and bypass control according to the standard
regulation of the standard HVAC based on the measured
exhaust air temperature after the recuperator - part of the
manual for frost protection of the heat exchange.
Anti-freeze protection – option (for a plate heat exchanger
mid
Control units VCS
with integrated mixing)
Additionally, over the standard, following is supplemented:
n
when activating this bypass, the inlet/outlet dampers are
preferably fully opened + the mixing valve is closed
n
Reduced speed of the intake fan to stage 1
Pool unit with integrated heat pump
and circulation damper
Anti-freeze protection – standard
is ensured by monitoring the state of the differential pressure
transmitter ∆Pmax (min. state 60s), while monitoring the
outdoor temperature below -5 ° C and the state when the
unit is supplying fresh air. If these conditions occur, the unit
will activate the antifreeze protection:
The unit switches to the preset time (default 15 minutes,
if ∆Pmax lasts longer) to the antifreeze mode (Economy
mode, dehumidification of 1st stage - circulation, bypass
closed). When the antifreeze mode is complete, re-activation
is blocked.
Anti-freeze protection – option
It is used in exceptional cases where the standard is very ac-
tive and reduces dehumidifying power and fresh air frequently.
Switching between variants is possible with HMI.
The activation is the same as the standard option. The inter-
vention is the same, except for the inlet and outlet dampers,
which are controlled according to the humidity requirement
(Economy mode, dehumidification of the 1st stage - circula-
tion, bypass closed, mixing valve is closed, supply / exhaust
flaps regulated).
n
Pump for pool water heating
The pump discharges excess heat that is generated during
the dehumidification and operation of the HVAC unit. It is
triggered under the condition of dehumidification requirement
and sufficient supply air temperature. Furthermore, there is a
requirement for dehumidification and the required room air
temperatures and active heat pump operation.
Additional control functions
Further, all other features based on the standard HVAC
application are fully available. These are described in the
relevant paragraphs for a standard application. Like:
n
Recovery and mixing at the start of the HVAC
n
Start optimization
n
Night cooling
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