Daikin EKHBH008BB Series Installation Manual page 40

Additional external backup heater permission signal [C-02]=2
This function gives the possibility to drive an additional external
backup heater.
The additional external backup heater can be used to assist space
heating (not domestic water heating) during low ambient conditions.
The signal for additional external heater will be activated when the
second step of the internal backup heater is closed and when the
outdoor temperature goes below [C-03] setting with [C-04]
hysteresis.
INFORMATION
When [4-07] "Backup heater second step" is disabled, then
the additional external backup heater signal will never be
activated.
■ [C-02]=2 Additional external backup heater operation is
enabled (2)
■ [C-03] External backup heater ON temperature: defines the
outdoor temperature below which the permission signal for
the external backup heater will be active (closed, KCR on
EKRP1HB).
■ [C-04] External backup heater hysteresis
External backup
(EKRP1HB)
closed
open
T Outdoor temperature
A
CAUTION
It is the responsibility of the installer to make sure no
unwanted situations can occur and that all safeties are
implemented according to applicable legislation.
Daikin shall not be held liable for any damage resulting
from failure to observe this rule.
INFORMATION
Permission signal X1–X2 can only be for the bivalent
operation OR external backup heater permission signal.
Both functions cannot be used at the same time.
(1) When the unit is configured for restricted power supply condition mode,
see "Appendix" on page 51.
Installation manual
37
heater permission signal
[C-04]
T
A
[C-03]
(1) [d] Benefit kWh rate power supply/Local shift value weather
(2)
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.
Only for EKHW*
[d-00]
0
(default)
1
2
3
Only for EKHTS
[d-00]
0 (default)
2
X1–X2
■ [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
rate power supply" on page
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
(2) When the unit is configured for restricted power supply condition mode,
see "Appendix" on page
(3) Only applicable for tank with built-in electrical booster heater (EKHW*).
(4) Only applicable for tank without electrical booster heater (EKHTS).
(5) 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
(6) 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)
:
Compressor Back up heater
Forced off Forced off
Forced off Forced off
Forced off Permitted
Forced off Permitted
(4)
:
Compressor
Forced off
Forced off
INFORMATION
■
[d-00] settings 1, 2 and 3 are only meaningful
if the benefit kWh rate power supply is of type
1 or indoor unit is connected to a normal kWh
rate power supply (via 30-31 X2M) and the
backup heater and booster heater are not
connected to the benefit kWh rate power
supply.
■
For EKHTS, do not select 1 or 3 value.
"Connection to a benefit kWh
22.
51.
"[3] Auto restart" on page
"[3] Auto restart" on page
Indoor unit for air to water heat pump system
Booster heater
Forced off
Permitted
Forced off
Permitted
Backup heater
Forced off
Permitted
(5)
.
(6)
.
28.
28.
EKHBH/X008BB
4PW62570-1A – 01.2011