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Pump operation and space heating
When the room thermostat for the floor heating loop (T1) and the fan
coil units (T2) are connected to the indoor unit, the pump (5) will
operate when there is a request for heating from T1 and/or T2. The
outdoor unit will start operating to achieve the target leaving water
temperature. The target leaving water temperature depends on which
room thermostat is requesting heating.
Set point
Field setting
Zone A
First
UI
Zone B
Second
[7-03]
Resulting water temperature
Result pump operation
When the room temperature of both zones is above the thermostat
set point, the outdoor unit and pump will stop operating.
NOTICE
■
Make sure to connect the thermostat wires to the
correct terminals (see
on page
10).
■
Make sure to configure the field settings [7-02], [7-03]
and [7-04] correctly. Refer to
on page
33.
■
Make sure to configure the DIP switch SS2-3 on the
PCB of the EKHBH switch box correctly. Refer to
"8.2. Room thermostat installation configuration" on
page
24.
■
It is the installers responsibility to make sure no
unwanted situations can occur (e.g. too high water
temperatures towards floor heating loops, etc.)
■
Be aware that the actual water temperature through
the floor heating loops depends on the control and
setting of the mixing station.
INFORMATION
■
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
■
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.
■
At this type of application heating/cooling selection
always has to be done on the user interface. Refer to
"Dual set point control" on page 33
4.
A
CCESSORIES
4.1. Accessories supplied with the indoor unit
See
figure 1
1 Installation manual
2 Operation manual
3 Shut-off valve
4 Wiring diagram sticker (inside indoor unit cover)
5 Indoor unit cover fixing screw
EKHBH/X008BB
Indoor unit for air to water heat pump system
4PW62570-1A – 01.2011
Thermo status
ON
OFF
ON
OFF
OFF
ON
ON
OFF
UI
[7-03]
[7-03]
—
ON
ON
ON
OFF
"5. Overview of the indoor unit"
"Dual set point control"
for more details.
5.
O
VERVIEW OF THE INDOOR UNIT
5.1. Opening the indoor unit
■
The front flap on the indoor unit cover gives access to the
manometer and user interface.
■
The indoor unit cover can be removed by removing the 2 bottom
screws and unhitching the cover.
INFORMATION
Make sure to fix the cover with the screws when installing
the cover (screws are delivered as accessory).
■
To gain access to the switch box components – e.g. to connect
the field wiring – the switch box service panel can be removed.
Thereto, loosen the front screws and unhitch the switch box
service panel.
DANGER: ELECTRICAL SHOCK
See
"2. General safety precautions" on page
DANGER: DO NOT TOUCH PIPING AND INTERNAL
PARTS
See
"2. General safety precautions" on page
2.
2.
Installation manual
10
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Troubleshooting
