Installation manual
39
E(D/B)(H/L)Q011~016BB
Unit for air to water heat pump system
4PW67904-1 – 01.2011
Dual set point control
Applies only to installations with different heat emitters which require
different set points.
Dual set point control makes it possible to generate 2 different set
points.
■
[7-02] Dual set point control status: defines whether the dual
set point control is enabled (1) or disabled (0).
■
[7-03] Second set point heating: specifies the second set
point temperature in heating operation.
■
[7-04] Second set point cooling: specifies the second set
point temperature in cooling operation.
[8] Domestic water heating mode timer
Applies only to installations with a domestic hot water tank.
The 'domestic water heating mode timer' field setting defines the
minimum and maximum domestic water heating times, minimum time
between two domestic water heating cycles by heat pump, and
booster heater delay time.
■
[8-00] Minimum running time: specifies the minimum time
period during which heat pump domestic water heating mode
should be activated, even when the target domestic hot water
temperature for heat pump (T
HP OFF
) has already been
reached.
■
[8-01] Maximum running time: specifies the maximum time
period during which heat pump domestic water heating mode
can be activated, even when the target domestic hot water
temperature for heat pump (T
HP OFF
) has not yet been
reached.
The actual maximum running time will automatically variate
between [8-01] and [8-01]+[8-04] depending on the outdoor
temperature. See figure in chapter
"[8-04]" on page 40
.
■
[8-02] Anti-recycling time: specifies the minimum required
interval between two heat pump domestic water heating
mode cycles.
The actual anti-recycling time will automatically variate
between [8-02] and 0 depending on the outdoor temperature.
See figure in chapter
"[8-04]" on page 40
.
1 Heat pump domestic water heating mode (1=active, 0=not
active)
2 Hot water request for heat pump (1=request, 0=no request)
t Time
INFORMATION
There is no indication available which set point is active!
NOTICE
■
The first set point heating/cooling is the set point
selected on the user interface.
-
In heating mode the first set point can be a fixed
value or weather dependent.
-
In cooling mode the first set point can be a fixed
value or weather dependent.
■
The second set point heating [7-03] should be linked
to the heat emitters which require the highest set
point in heating mode. Example: fan coil units.
■
The second set point cooling [7-04] is always a fixed
value. It should be linked to the heat emitters which
require the lowest set point in cooling mode.
Example: fan coil units.
■
The actual second set point heating value depends
on the selected value of setting [7-03].
-
In case [7-03]=1~24, the actual second set point
will be first set point heating increased with [7-03]
(the maximum is 55°C).
In this way the second set point heating is linked to
the first set point heating.
-
In case [7-03]=25~55, the actual second set point
heating is equal to [7-03].
■
The selection of second set point or first set point is
determined by the terminals (X2M: 1, 2, 4).
The second set point has always priority on the first
set point.
INFORMATION
When dual set point control is enabled, heating/cooling
selection always has to be done on the user interface.
NOTICE
It is the responsibility of the installer to make sure no
unwanted situations can occur.
It is very important that the water temperature to the floor
heating loops never becomes too high in heating mode or
never too cold in cooling mode. Failure to observe this rule
can result in construction damage or discomfort. For
example in cooling mode condensation on the floor can
occur when water towards the floor heating loops is too
cold (dew point).
X2M
1
2
3
4
SP1
SP2
SP1 First set point contact
SP2 Second set point contact
INFORMATION
Note that when the unit is configured to work with a
room thermostat (refer to
"10.2. Room thermostat
installation configuration" on page
29
), the
maximum running timer will only be taken into
account when there is a request for space heating
or space cooling. When there is no request for
space heating or space cooling, domestic water
heating by the heat pump will continue until the
'heat pump OFF temperature' (see field settings
"[6]" on page 37
) is reached. When no room
thermostat is installed, the timer is always taken
into account.
INFORMATION
■
If the outdoor temperature is higher than the field
setting to which parameter [4-02] is set, and lower
than the field setting to which parameter [F-01], then
field settings of parameters [8-01], [8-02], and [8-04]
are not considered.
■
Parameter [F-01] is only applicable for EB units.
t
1
0
1
0
[8-01]
[8-02]
[8-00]
