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The following table summarizes the required configuration and
thermostat wiring at the terminal block 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.
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 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 a thermostat is connected to the 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 pump operation configurations
when the thermostat is connected or not as described above.
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
E(D/B)(H/L)Q011~016BA6V3+W1
Unit for air to water heat pump system
4PW57621-1A
Pump
y
y
=
=
operation
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
"Setting the pump
27.
33.
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)
p p p p r r r r
Configuration
UI
• [7-02]=1
• SS2-3=OFF
• wiring:
X2M
1 2 3 4
UI
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.
Domestic hot water tank installation configuration
When no domestic hot water tank is
installed, toggle switch SS2-2 should be set to
OFF (default).
When a domestic hot water tank is installed,
toggle switch SS2-2 should be set to ON.
When SS2-3 was set to ON without all necessary and
correct wiring connections between indoor unit and switch
box of the domestic hot water tank, the error code AC will
be displayed on the user interface.
Initial start-up at low outdoor ambient temperatures
During initial start-up and when water temperature is low, it is
important that the water is heated gradually. Failure to do so may
result in cracking of concrete floors due to rapid temperature change.
Please contact the responsible cast concrete building contractor for
further details.
To do so, the lowest leaving water set temperature can be decreased
to a value between 15°C and 25°C by adjusting the field setting
[9-01] (heating set point lower limit). Refer to
page
28.
NOTE
Heating between 15°C and 25°C is performed by the
backup heater only.
Dual set point
y
y
y
y
Pump operation
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
"Field settings" on
=
=
=
=
p p p p r r r r
UI
UI
UI
—
1
2
3
4
1
2
3
4
Installation manual
26
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