L
A
A
H
K1A
K2A
X2M
K1A
C
H
Com
■
K1A
KCR
■
Field wiring configuration A
NOTE
■
Configuration A
Make sure that auxiliary contact (A) has sufficient
H
Com
differential or time delay so as to avoid frequent
E(D/B)*/auto / Boiler
E(D/B)*
X2M
Boiler
thermostat input
changeover between the E(D/B)* unit and the
boiler. If the auxiliary contact (A) is an outdoor
K1A
1 2 3 4
K2A
X Y
temperature thermostat, make sure to install the
thermostat in the shade, so that it is not
influenced or turned ON/OFF by the sun.
N
K1A
K2A
Configuration B
Make sure that the bivalent hysteresis [C-04] has
Boiler
thermostat input
Boiler thermostat input
sufficient differential to avoid frequent changeover
between the E(D/B)* unit and the boiler. As the
Auxiliary contact (normal closed)
outdoor temperature is measured via the outdoor
Heating demand room thermostat (optional)
unit, air thermistor make sure to install the
Auxiliary relay for activation of E(D/B)* unit (field
supply)
outdoor unit in the shade, so that it is not
influenced by the sun.
Auxiliary relay for activation of boiler (field supply)
Frequent switching may cause corrosion of the
boiler in an early stage. Contact the manufacturer
Field wiring configuration B
of the boiler.
E(D/B)*
EKRP1HB
■
During heating operation of the E(D/B)* unit, the
unit will operate so as to achieve the target
1 2 3 4
KCR
leaving water temperature as set on the user
K1A
X1 X2
interface. When weather dependent operation is
active, the water temperature is determined
automatically depending on the outdoor
C
Com
H
X Y
temperature.
EKRTW*
Boiler
thermostat input
During heating operation of the boiler, the boiler
Boiler
thermostat input
Boiler thermostat input
will operate so as to achieve the target leaving
water temperature as set on the boiler controller.
Cooling demand room thermostat (optional)
Heating demand room thermostat (optional)
Common room thermostat (optional)
Never set the target leaving water temperature set
point on the boiler controller above 131°F (55°C).
Make sure to only have 1 expansion vessel in the
water circuit. An expansion vessel is already
Auxiliary relay for activation of bolier unit
(field supply)
premounted in the Daikin unit.
Permission signal for the auxiliary boiler
NOTE
Make sure to configure the DIP switch SS2-3 on the
Operation
■
Configuration A
PCB of the E(D/B)* switchbox correctly. Refer to
"Room thermostat installation configuration" on
page 23.
When the room thermostat requests heating, either the E(D/B)*
unit or the boiler starts operating, depending on the position of
the auxiliary contact (A).
For configuration B: Make sure to configure the field
settings [C-02, C-03 and C-04] correctly. Refer to
"Bivalent operation" on page 33.
Configuration B
When the room thermostat requests heating, either the E(D/B)*
CAUTION
unit or the boiler starts operating, depending on the outdoor
temperature (status of "permission signal for the auxiliary
boiler").
Make sure that return water to the E(D/B)* heat exchanger
never exceeds 131°F (55°C).
When the permission is given towards the boiler, the space
heating operation by the E(D/B)* unit will be automatically
switched off.
For this reason, never put the target leaving water
temperature set point on the boiler controller above 131°F
(55°C) and install an aquastat
(a)
valve in the return water
flow of the E(D/B)* unit.
For more details see field setting [C-02~C-04].
Make sure that the non-
return valves (field supply) are
correctly installed in the system.
Make sure that the room thermostat (th) is not frequently
turned ON/OFF.
Daikin shall not be held liable for any damage resulting
from failure to observe this rule.
(a) The aquastat valve must be set for 131°F (55°C) and must operate to close the
return water flow to the unit when the measured temperature exceeds 131°F
(55°C). When the temperature drops to a lower level, the aquastat valve must
operate to open the return water flow to the E(D/B)* unit again.
Manual permission towards the E(D/B)* unit on the boiler.
In case only the E(D/B)* unit should operate in space
heating mode, disable the bivalent operation via setting
[C-02].
In case only the boiler should operate in space heating
mode, increase the bivalent ON temperature [C-03] to
77°F (25°C).
Installation manual
EDLQ036~054B EBLQ036~054BA6VJU1
10
Unit for air to water heat pump system
4PW56182-1
