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When the room temperature of both zones is above the thermostat
set point, the outdoor unit and pump will stop operating.
Make sure to connect the thermostat wires to the
NOTE
correct terminals (see
page
12).
Make sure to configure the field settings [7-02],
[7-03] and [7-04] correctly. Refer to
control" on page
Make sure to configure the DIP switch SS2-3 on
the PCB of the E(D/B)* switch box correctly. Refer
to
"Room thermostat installation configuration" on
page
25.
NOTE
The request signals for space heating can be
implemented in two different ways (installer
choice).
-
Thermo ON/OFF signal from room thermostat
-
Status signal (active/not active) from the
mixing station
It is the installers responsibility to make sure no
unwanted situations can occur (e.g. too high
water temperatures towards floor heating loops,
etc.)
Daikin does not offer any type of mixing station.
Dual set point control only provides the possibility
to use two set points.
When only zone A request heating, zone B will be
fed with water at a temperature equal to the first
set point.
This can lead to unwanted heating of zone B.
When only zone B request heating, the mixing
station will be fed with water at a temperature
equal to the second set point.
Depending on the control of the mixing station,
the floor heating loop can still receive water at a
temperature equal to set point of the mixing
station.
Be aware that the actual water temperature through the
floor heating loops depends on the control and setting of
the mixing station.
O
VERVIEW OF THE UNIT
Opening the unit
2
2
1
3
Door 1
gives access to the compressor compartment and electrical parts
Door 2
gives access to the electrical parts of the hydraulic compartment
Door 3
gives access to the hydraulic compartment
Switch off all power supply — i.e. unit power supply and
backup heater and domestic hot water tank power supply
(if applicable) — before removing doors 1 and 2.
Parts inside the unit can be hot.
E(D/B)(H/L)Q011~016BA6V3+W1
Unit for air to water heat pump system
4PW57621-1A
"Overview of the unit" on
"Dual set point
33.
Main components
Hydraulic compartment (door 3)
1
18
13
17
16
15
8
10
3
9
8
14
12
3
11
1.
Air purge valve
Remaining air in the water circuit will be automatically removed
via the air purge valve.
2.
Backup heater
The backup heater consists of an electrical heating element that
will provide additional heating capacity to the water circuit if the
heating capacity of the unit is insufficient due to low outdoor
temperatures, it also protects the external water piping from
freezing during cold periods.
3.
Temperature sensors
Four temperature sensors determine the water and refrigerant
temperature at various points in the water circuit.
4.
Heat exchanger
5.
Expansion vessel (10 l)
6.
Refrigerant liquid connection
7.
Refrigerant gas connection
8.
Shut-off valves
The shut-off valves on the water inlet connection and water
outlet connection allow isolation of the unit water circuit side
from the residential water circuit side. This facilitates draining
and filter replacement of the unit.
9.
Water inlet connection
10. Water outlet connection
11. Drain and fill valve
12. Water filter
The water filter removes dirt from the water to prevent damage
to the pump or blockage of the evaporator. The water filter must
be cleaned on a regular base. See
on page
40.
13. Manometer
The manometer allows readout of the water pressure in the
water circuit.
2
3
4
5
7
6
3
"Maintenance and service"
Installation manual
12
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