E(D/B)(H/L)Q011~016BB
Unit for air to water heat pump system
4PW67904-1 – 01.2011
Installation manual
42
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.
■
[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 heater permission signal X1–X2 (EKRP1HB)
T
A
Outdoor temperature
[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.
Only for EKHW*
(1)
:
Only for EKHTS
(2)
:
■
[d-01] Unit connection to benefit kWh rate power supply:
Defines whether or not the 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 26
.
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
(3)
.
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
(4)
.
INFORMATION
■
In case the outdoor unit is not single phase (W1),
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 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.
INFORMATION
When [4-07] "Backup heater second step" is disabled, then
the additional external backup heater signal will never be
activated.
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.
YC Y1 Y2 Y3 Y4
X1
X2
X3
X4
OFF ON
X2M
SS1
X1M
closed
open
T
A
[C-03]
[C-04]
(1) Only applicable for tank with built-in electrical booster heater (EKHW*).
[d-00]
Compressor
Back up heater
Booster heater
0
(default)
Forced off
Forced off
Forced off
1
Forced off
Forced off
Permitted
2
Forced off
Permitted
Forced off
3
Forced off
Permitted
Permitted
(2) Only applicable for tank without electrical booster heater (EKHTS).
[d-00]
Compressor
Backup heater
0 (default)
Forced off
Forced off
2
Forced off
Permitted
INFORMATION
■
[d-00] settings 1, 2 and 3 are only meaningful
if the benefit kWh rate power supply is of type
1 or the unit is connected to a normal kWh
rate power supply (via 1-2 X11M) 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.
(3) 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 34
.
(4) 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 34
.
