RKHBH/X008BB
Indoor unit for air to water heat pump system
4PW62574-1 – 10.2010
Installation manual
24
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)
8.4. Domestic hot water tank installation
configuration
As mentioned in "Domestic hot water tank (option)" on page 3, 2
types of domestic hot water tanks are available:
■ tank with built-in electrical booster heater (RKHW*)([4-03]
default value will be 3),
■ tank without electrical booster heater (RKHTS)([4-03] default
value will be 5).
Thermostat Configuration Pump operation yy
yy
==
==
pp
pp
rr
rr
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
TT—
INFORMATION
To set the pump speed, refer to "8.8. Setting the pump
speed" on page 26.
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
1234
X2M
1234
Dual set point
Configuration Pump operation yy
yy
==
==
pp
pp
rr
rr
• [7-02]=1
• SS2-3=OFF
• wiring:
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
• [7-02]=1
• SS2-3=ON
• wiring:
on when main or/and
sub set point is
requested
SP2/SP1 UI —
SP1 = First set point contact
SP2 = Second set point contact
■ 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.
NOTICE
For correct operation of the system, it is very important to
make the correct and complete wiring connections
between indoor unit and switch box
(a)
of the domestic hot
water tank before setting SS2-2 to ON.
The applicable logic and settings (example [4-03] default)
are activated according to the connected tank. See
"[4] Backup/booster heater operation and space heating
off temperature" on page 28 for more details.
(a) Only applicable for tank with built-in electrical booster heater (RKHW*).
X2M
SP1SP2
123
4
X2M
1234
SP1
SP2
4321
ONOFF
4321
ONOFF
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