Installation manual
33
EKHBH/X008BB
Indoor unit for air to water heat pump system
4PW62570-1A – 01.2011
■
[7-01]
Hysteresis value booster heater: temperature
difference determining the booster heater ON temperature
(T
BH ON
). T
BH ON
=T
BH OFF
–[7-01]
Dual set point control
Applies only to installations with different heat emitter 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.
WARNING
Be aware that the domestic hot water temperature will be
automatically increased (always) with the value selected in
field setting [7-00] compare to the user set point for
domestic hot water (T
U
). Refer to field setting [7-00] and
the operation manual to select preferable set point.
If this domestic hot water temperature can be a potential
risk for human injuries, a mixing valve (field supply) shall
be installed at the hot water outlet connection of the
domestic hot water tank. This mixing valve shall secure
that the hot water temperature at the hot water tap never
rise above a set maximum value. This maximum allowable
hot water temperature shall be selected according to the
applicable legislation.
INFORMATION
If the booster heater operation is limited ([4-03]=0), then
set point of field setting parameter [7-00] has only meaning
for powerful domestic water heating.
INFORMATION
The minimum value for booster heater ON
temperature (T
BH ON
) is 2°C (fixed) below heat pump
OFF temperature (T
HP OFF
).
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 requires the highest set
point in heating mode. Example: fan coil unit.
■
The second set point cooling [7-04] is always a fixed
value. It should be linked to the heat emitters which
requires the lowest set point in cooling mode.
Example: fan coil unit.
■
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
