Daikin EKHBX030BA Installation Manual page 35

[C-04] Bivalent hysteresis: defines the temperature difference
between bivalent ON temperature and bivalent OFF
temperature.
Permission signal X1–X2 (EKRP1HB)
closed
[C-04]
open
[C-03]
T Outdoor temperature
A
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.
In case the outdoor unit is single phase, 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.
X2M
EKHBH/X030BA
Indoor unit for air to water heat pump system
4PW62568-1 – 07.2010
T
A
OFF ON
SS1
X1M
YC Y1 Y2 Y3 Y4
[D] Benefit kWh rate power supply/Local shift value weather
dependent
Benefit kWh rate power supply
[D-00] Switching off heaters: Defines which heaters are
switched off when the benefit kWh rate signal of the
electricity company is received.
If [D-01]=1 or 2 and the benefit kWh rate signal of the
electricity company is received, following devices will be
switched off:
[D-00] Compressor
0 Forced off
(default)
1 Forced off
2 Forced off
3 Forced off
[D-00] settings 1, 2 and 3 are only meaningful if the
benefit kWh rate power supply is of the type that
power supply is not interrupted,
[D-01] Unit connection to benefit kWh rate power supply:
Defines whether or not the outdoor unit is connected to a
benefit kWh rate power supply.
If [D-01]=0, the unit is connected to a normal power supply
(default value).
If [D-01]=1 or 2, the unit is connected to a benefit kWh rate
power supply. In this case the wiring requires specific
installation like explained in "Connection to a benefit kWh
rate power supply" on page 20.
When parameter [D-01]=1 at the moment that the benefit
kWh rate signal is sent by the electricity company, that
contact will open and the unit will go in forced off mode
When parameter [D-01]=2 at the moment that the benefit
kWh rate signal is sent by the electricity company, that
contact will close and the unit will go in forced off mode
(1) When the signal is released again, the voltage free contact will close and the unit
will restart operation. It is therefore important to leave the auto restart function
enabled. Refer to "[3] Auto restart" on page 27.
(2) When the signal is released again, the voltage free contact will open and the unit
will restart operation. It is therefore important to leave the auto restart function
enabled. Refer to "[3] Auto restart" on page 27.
Back up heater Booster heater
Forced off Forced off
Forced off Permitted
Permitted Forced off
Permitted Permitted
(1)
.
(2)
.
Installation manual
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