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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.
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)
Thermostat
Configuration
No thermostat
• SS2-3 = OFF
• wiring: (non)
X2M
1 2 3 4
• SS2-3 = ON
• wiring:
X2M
1 2 3 4
Heating only
• SS2-3 = ON
• wiring: (see
thermostat
installation
manual of the
room
thermostat kit)
Thermostat with
• SS2-3 = ON
heating/cooling
• wiring: (see
switch
installation
manual of the
room
thermostat kit)
(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.
Installation manual
22
Pump
operation
y
y
y
y
=
=
=
=
determined by
UI
UI
leaving water
(a)
temperature
on when space
UI
UI
heating or
cooling is on
(y)
on when
T
—
heating
request by
room
thermostat
on when
T
T
heating
request or
cooling request
by room
thermostat
Pump operation configuration
NOTE
To set the pump speed, refer to
speed" on page
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.
p p p p r r r r
Dual set point
UI
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 pump operation configurations
when the thermostat is connected or not as described above.
UI
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. Refer to
"Dual set point control" on page
—
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)
Configuration
• [7-02]=1
• SS2-3 = OFF
• wiring:
X2M
1 2 3 4
SP2
SP1
• [7-02]=1
• SS2-3 = ON
• wiring:
X2M
1 2 3 4
SP2
SP1
SP1 =
SP2 =
(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.
"Setting the pump
23.
28.
Dual set point
y
y
Pump operation
y
y
determined by
UI
leaving water
(a)
temperature
on when main or/and
SP2/SP1
sub set point is
requested
First set point contact
Second set point contact
Indoor unit for air to water heat pump system
=
=
p p p p r r r r
=
=
UI
UI
UI
—
EKHBH/X016BA
4PW54187-1B
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