Installation manual
7
E(D/B)(H/L)Q011~016BB
Unit for air to water heat pump system
4PW67904-1 – 01.2011
The ON/OFF setting of the heating/cooling operation is done by the
user interface.
Application 5
Space heating with an auxiliary boiler (alternating operation)
Space heating application by either the Daikin unit or by an auxiliary
boiler connected in the system. The decision whether either the
E(D/B)* unit or the boiler will operate can be achieved by an auxiliary
contact or an E(D/B)* indoor controlled contact.
The auxiliary contact can e.g. be an outdoor temperature thermostat,
an electricity tariff contact, a manually operated contact, etc. See
"Field wiring configuration A" on page 7
.
The E(D/B)* unit controlled contact (also called 'permission signal for
the auxiliary boiler") is determined by the outdoor temperature
(thermistor located at the unit). See
"Field wiring configuration B" on
page 8
.
Bivalent operation is only possible for space heating operation, not
for the domestic water heating operation. Domestic hot water in such
an application is always provided by the domestic hot water tank
which is connected to the Daikin unit.
The auxiliary boiler must be integrated in the piping work and in the
field wiring according to the illustrations below.
1 Unit
2 Heat exchanger
3 Backup heater
(1)
4 Pump
5 Shut-off valve
6 Collector (field supply)
7 Motorised 3-way valve (delivered with the domestic hot
water tank)
8 Booster heater
(2)
9 Heat exchanger coil
10 Domestic hot water tank (optional)
11 Boiler (field supply)
12 Aquastat valve (field supply)
13 Shut-off valve (field supply)
14 Non-return valve (field supply)
FHL1...3 Floor heating loop (field supply)
UI User interface
Field wiring configuration A
B
TI
Boiler thermostat input
A Auxiliary contact (normal closed)
H Heating demand room thermostat (optional)
Com Common room thermostat (optional)
E(D/B)* Unit
auto Automatic
Boiler Boiler
K1A Auxiliary relay for activation of E(D/B)* unit (field supply)
K2A Auxiliary relay for activation of boiler (field supply)
NOTICE
■
When closing several loops in the system by remotely
controlled valves, it might be required to install a by-
pass valve (
7
) to avoid the flow switch safety device
from being activated. See also
"Application 2" on
page 5
.
■
Wiring of the 2-way valve (
8
) is different for a NC
(normal closed) valve and a NO (normal open) valve!
Make sure to connect to the correct terminal numbers
as detailed on the wiring diagram.
CAUTION
■
Be sure that the boiler and the integration of the boiler
in the system is in accordance with the applicable
legislation.
■
Always install a 3-way valve, even if no domestic hot
water tank is installed. This to ensure that the freeze
protection function (see
"Freeze protection function"
on page 35
) can operate when the boiler is active.
1 Motorised 3-way valve
2 Boiler
UI User interface
■
Daikin can not be put responsible for incorrect or
unsafe situations in the boiler system.
M
FHL1 FHL2
FHL3
1
2
UI
(1) For tank without electrical booster heater (EKHTS), the backup heater will
be used in domestic water heating mode.
(2) Only applicable for tank with built-in electrical booster heater (EKHW*).
M
FHL1
FHL2
FHL3
7
14
12
13
11
6
13
10
8
9
5
4
2
3
1
UI
1
2
3
4
K1A
K1A
K2A
X Y
K2A
BTI
L
N
E(D/B)*/auto
/
Boiler
A
E(D/B)*
X2M
H
Com
