8 Configuration
Installer reference guide
50
RRLQ004~008CA + RHBH/X04+08CB
ROTEX HPSU low temperature Bi‑bloc
4P384979-1C – 2017.04
Following settings must be made accordingly.
#
Code
Description
[A.2.2.1]
[E-05]
DHW operation:
Can the system prepare domestic hot
water?
▪ 0 (No): NOT installed. Default for
RHBH/X.
▪ 1 (Yes): N/A.
[A.2.2.3]
[E-07]
During domestic hot water preparation,
the heat pump can be assisted by an
electrical heater to ensure the domestic
hot water preparation even for high
desired tank temperatures.
DHW tank type:
▪ 0 (Type 1): Tank with booster heater
installed at the side of the tank.
Default for RHBH/X.
▪ 1 (Type 2): N/A.
Range: 0~6. However, values 2~6 are
not applicable for this setting. If the
setting is set to 6, an error code will
appear and the system will NOT operate.
[A.2.2.A]
[D-02]
The indoor unit offers the possibility to
connect a field supplied domestic hot
water pump (On/OFF type). Depending
on the installation and configuration on
the user interface, we distinguish its
functionality.
DHW pump:
▪ 0 (No)(default): NOT installed.
▪ 1 (Secondary rtrn): Installed for instant
hot water when water is tapped. The
end-user sets the operation timing
(weekly
schedule
time)
of
the
domestic hot water pump when it
should run. Control of this pump is
possible through the indoor unit.
▪ 2
(Disinf.
shunt):
Installed
for
disinfection.
It
runs
when
the
disinfection function of the domestic
hot water tank is running. No further
settings are needed.
See also illustrations below.
Domestic hot water pump installed for…
Instant hot water
Disinfection
c
f
b
a
g
c
b
a
d f
e g
a
Indoor unit
b
Tank
c
Domestic hot water pump (field supply)
d
Heater element (field supply)
e
Non‑return valve (field supply)
f
Shower (field supply)
g
Cold water
INFORMATION
The correct domestic hot water default settings becomes
only applicable when domestic hot water operation is
activated ([E‑05]=1).
Thermostats and external sensors
NOTICE
If an external room thermostat is used, the external room
thermostat will control the room frost protection. However,
the room frost protection is only possible if the leaving
water temperature control on the unit's user interface is
turned ON.
See
"5 Application guidelines" on page 10
.
#
Code
Description
[A.2.2.4]
[C-05]
Contact type main
In external room thermostat control, the
contact type of the optional room
thermostat or heat pump convector for
the main leaving water temperature zone
must be set. See
"5 Application
guidelines" on page 10
.
▪ 1 (Thermo ON/OFF): The connected
external room thermostat or heat
pump convector sends the heating or
cooling demand by the same signal as
it is connected to only 1 digital input
(preserved for the main leaving water
temperature zone) on the indoor unit
(X2M/1). Select this value in case of a
connection
to
the
heat
pump
convector (RFWXV).
▪ 2
(H/C
request)(default):
The
connected external room thermostat
sends separate heating and cooling
demand and is therefore connected to
the 2 digital input (preserved for the
main leaving water temperature zone)
on the indoor unit (X2M/1 and 2).
Select this value in case of connection
with the wired (RKRTWA) or wireless
(RKRTR1) room thermostat.
[A.2.2.5]
[C-06]
Contact type add.
In external room thermostat control with
2 leaving water temperature zones, the
type of the optional room thermostat for
the additional leaving water temperature
zone must be set. See
"5 Application
guidelines" on page 10
.
▪ 1 (Thermo ON/OFF): See Contact
type main. Connected on the indoor
unit (X2M/1a).
▪ 2 (H/C request)(default): See Contact
type main. Connected on the indoor
unit (X2M/1a and 2a).
