EKHBH/X008BB
Indoor unit for air to water heat pump system
4PW62570-1A – 01.2011
Installation manual
24
8.2.
Room thermostat installation configuration
The following table summarizes the required configuration and
thermostat wiring at the terminal block (X2M: 1, 2, 3, 4) in the switch
box. Pump operation is listed in the third column. The three last
columns indicate whether the following functionality is available on
the user interface (UI) or handled by the thermostat (T):
•
space heating or cooling on/off (
y
)
•
heating/cooling changeover (
=
)
•
heating and cooling schedule timers (
pr
)
8.3.
Pump operation configuration
Without room thermostat: DIP switch SS2-3=OFF
When no thermostat is connected to the indoor unit, pump operation
will be determined by the leaving water temperature.
To force continuous pump operation when no room thermostat is
connected do the following:
-
set toggle switch SS2-3 to ON,
-
short-circuit the terminal numbers 1-2-4 on the terminal block
in the switch box.
With room thermostat DIP switch: SS2-3=ON
When the thermostat is connected to the indoor unit, the pump will
operate continuously whenever there is heating or cooling demand
requested by the thermostat.
Dual set point
When dual set point is enabled, the pump operation will be
determined depending on the status of the DIP switch SS2-3 and set
point selection contacts. Refer to the table below.
The following table summarizes the required configuration and wiring
at the terminal block (X2M: 1, 2, 4) in the switch box. Pump operation
is listed in the third column. The three last columns indicate whether
the following functionality is available on the user interface (
UI
) or
handled by the set point selection contacts SP1 and SP2:
•
space heating or cooling on/off (
y
)
•
heating/cooling changeover (
=
)
•
heating and cooling schedule timers (
pr
)
DIP
switch
SS2
Description
ON
OFF
1
Not applicable for installer
—
(Default)
2
Domestic hot water tank
installation
(see
water tank installation
configuration" on page 25
)
Installed
Not installed
(Default)
3
Room thermostat
connection
(see
thermostat installation
configuration" on page 24
)
Room thermostat
connected
No room
thermostat
connected
(Default)
4
This setting
(a)
decides the
operation mode of the
heat pump when there is a
simultaneous demand for
more space heating/
cooling and domestic
water heating.
(a) Only applicable in case DIP switch 2 = ON.
Heating/cooling
priority
Priority to highest
demand side
(b)
(b) Heating/cooling or domestic water heating mode can be restricted by schedule
timer and/or field settings (4, 5, 8).
■
When
no room thermostat
is connected to
the indoor unit, toggle switch SS2-3 should be
set to
OFF
.
■
When the
room thermostat
is connected to
the indoor unit, toggle switch SS2-3 should be
set to
ON
.
■
On the room thermostat, confirm the correct settings (
6®02
=yes,
6®05
=9,
6®06
=5) to prevent the pump from repeatedly turning on
and off (i.e. chattering), and thereby impacting the lifetime of
the pump.
INFORMATION
■
When the room thermostat is connected to the indoor
unit, the heating and cooling schedule timers are
never available. Other schedule timers are not
affected. For more information on the schedule timers,
refer to the operation manual.
■
When the room thermostat is connected to the indoor
unit, and the
=
button or
y
button is pressed, the
centralised control indicator
e
will flash to indicate
that the room thermostat has priority and controls on/
off operation and change over operation.
4
3
2
1
ON
OFF
4
3
2
1
ON
OFF
Thermostat
Configuration
Pump operation
y
y
y
y
=
=
=
=
p
p
p
pr
r
r
r
No thermostat
• SS2-3=OFF
• wiring: (non)
determined by
leaving water
temperature
(a)
(a) The pump will stop when space heating/cooling is turned off or when the water
reaches the desired water temperature as set on the user interface. With space
heating/cooling turned on, the pump will then run every 5 minutes during 3
minutes to check the water temperature.
UI
UI
UI
• SS2-3=ON
• wiring:
on when space
heating or
cooling is on
(
y
)
UI
UI
UI
Heating only
thermostat
• SS2-3=ON
• wiring: (see
installation
manual of the
room
thermostat kit)
on when heating
request by room
thermostat
T
—
—
Thermostat with
heating/cooling
switch
• SS2-3=ON
• wiring: (see
installation
manual of the
room
thermostat kit)
on when heating
request or
cooling request
by room
thermostat
T
T
—
INFORMATION
To set the pump speed, refer to
INFORMATION
When dual set point is enabled, the "forced continuous
pump operation" is not possible. When SS2-3 is ON while
SP1 and SP2 are both closed, the pump operation will be
the same operation as "with room thermostat" and the
second set point will be the applicable set point. See table
below.
X2M
1
2
3
4
X2M
1
2
3
4
