EKHBH/X008BB
Indoor unit for air to water heat pump system
4PW62570-1A – 01.2011
Installation manual
36
[C] Setup on EKRP1HB digital I/O PCB
Solar priority mode
■
[C-00] Solar priority mode setting: for information concerning
the EKSOLHW solar kit, refer to the installation manual of
that kit.
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 Daikin 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
[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
CAUTION
Make sure to observe all rules mentioned in
application 5 when bivalent operation function is
enabled.
Daikin 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
