Installation manual
35
RKHBH/X008BB
Indoor unit for air to water heat pump system
4PW62574-1 – 10.2010
Automatic setback function
Setback function provides the possibility to lower the water
temperature during space heating. The setback function can for
instance be activated during the night because the temperature
demands during night and day are not the same.
■
[9-05] Defines whether the setback function is turned ON (1)
or OFF (0)
■
[9-06] Start time: time at which setback is started
■
[9-07] Stop time: time at which setback is stopped
■
[9-08] Leaving water setback value
A
Normal leaving water temperature set point or calculated
weather depended set point
B
Calculated leaving water setback temperature set point
t
Time
T
Temperature
In case the RKHW* is installed and [4-03]=4 or the RKHTS tank is
installed, it is advised to set the start time of automatic storage during
night [6-04] on the moment that the setback function starts [9-06].
[C] Setup on EKRP1HB digital I/O PCB
Alarm output logic
■
[C-01] Alarm output logic: defines the logic of the alarm
output on the EKRP1HB digital I/O PCB.
[C-01]=0, the alarm output will be powered when an alarm
occurs (default).
[C-01]=1, the alarm output will not be powered when an
alarm occurs. This field setting allows for distinction between
detection of an alarm and detection of a power failure to the
unit.
Bivalent operation
Applies only to installations with an auxiliary boiler (alternating
operation, parallel connected). The purpose of this function is to
determine — based on the outdoor temperature — which heating
source can/will provide the space heating, either the Rotex indoor
unit or an auxiliary boiler.
The field setting "bivalent operation" apply only the indoor unit space
heating operation and the permission signal for the auxiliary boiler.
When the "bivalent operation" function is enabled, the indoor unit will
stop automatically in space heating operation when the outdoor
temperature drops below "bivalent ON temperature" and the
permission signal for the auxiliary boiler becomes active.
When the bivalent operation function is disabled, the space heating
by indoor unit is possible at all outdoor temperatures (see operation
ranges) and permission signal for auxiliary boiler is always
disactivated.
■
[C-02] Bivalent operation status: defines whether bivalent
operation is enabled (1) or disabled (0).
■
[C-03] Bivalent ON temperature: defines the outdoor
temperature below which the permission signal for the
auxiliary boiler will be active (closed, KCR on EKRP1HB) and
space heating by indoor unit will be stopped.
■
[C-04] Bivalent hysteresis: defines the temperature difference
between bivalent ON temperature and bivalent OFF
temperature.
Permission signal X1–X2 (EKRP1HB)
T
A
Outdoor temperature
INFORMATION
■
Remark that the
b
icon will be flashing during setback
operation. The calculated leaving water setback set
point is
not
shown during setback operation.
■
By default the setback function is disabled.
■
The setback function can be combined with the
automatic weather dependent set point operation.
■
Setback function is an automatic daily scheduled
function.
■
The setback function can be combined with the
schedule timer. When setback is active, the scheduled
space heating set point will be lowered with the [9-08]
leaving water setback value.
INFORMATION
Pay attention not to set the setback value too low,
especially during colder periods (e.g. winter time). It is
possible that the room temperature can not be reached (or
it will take a much longer time) because of the big
temperature difference.
[C-01]
Alarm
No alarm
No power supply
to unit
0
(default)
Closed output
Open output
Open output
1
Open output
Closed output
Open output
[
9
-0
6
]
[
9
-07]
B
A
T
t
55
°
C
53
°
C
2
°
C [
9
-08]
CAUTION
Make sure to observe all rules mentioned in
application 5 when bivalent operation function is
enabled.
Rotex shall not be held liable for any damage resulting
from failure to observe this rule.
INFORMATION
■
The combination of setting [4-03]=0/2 with
bivalent operation at low outdoor temperature
can result in domestic hot water shortage.
■
The bivalent operation function has no impact on
the domestic water heating mode. The domestic
hot water is still and only heated by the indoor
unit.
■
The permission signal for the auxiliary boiler is
located on the EKRP1HB (digital I/O PCB).
When it is activated, the contact X1, X2 is closed
and open when it is disactivated. See figure for
the schematic location of this contact.
T
A
[C-03]
[C-04]
closed
open
YC Y1 Y2 Y3 Y4
X1
X2
X3
X4
OFF ON
X2M
SS1
X1M
