Rotex HPSU Bi-Bloc Ultra Series Installer's Reference Manual page 73

Timers for simultaneous space and domestic hot water
operation request
# Code
[9.6.4] [8-02] Anti-recycle timer: Minimum time
between two cycles for domestic hot
water. The actual anti-recycling time also
depends on setting [8-04].
Range: 0~10 hours
Remark: The minimum time is 0.5 hours
even when the selected value is 0.
Minimum running timer:
[9.6.5] N/A
Do NOT change.
[9.6.6] [8-01] Maximum running timer for domestic
hot water operation. Domestic hot water
heating stops even when the target
domestic hot water temperature is NOT
reached. The actual maximum running
time also depends on setting [8-04].
▪ When Control=Room
This preset value is only taken into
account if there is a request for space
heating or cooling. If there is NO
request for space heating/cooling, the
tank is heated until the setpoint has
been reached.
▪ When Control≠Room
This preset value is always taken into
account.
Range: 5~95 minutes
[9.6.7] [8-04] Additional timer: Additional running
time for the maximum running time
depending on the outdoor temperature
[4-02] or [F-01].
Range: 0~95 minutes
[8-02]: Anti-recycle timer
1
0
1
0
[8-01] [8-02]
1 Heat pump domestic water heating mode (1=active, 0=not
active)
2 Hot water request for heat pump (1=request, 0=no request)
t Time
[8-04]: Additional timer at [4-02]/[F-01]
t
[8-01]+
[8-04]
[8-02]
[8-01]
0
[5-03] [4-02]
T
T Ambient (outdoor) temperature
A
t Time
Anti-recycle timer
Maximum running time domestic hot water
RRGA04~08DAV3 + RHBX04+08DA
ROTEX HPSU Bi-Bloc Ultra
4P495262-1B – 2019.10
Description
thermostat:
thermostat:
t
t
[8-01]+
[8-04]
[8-02]
[8-01]
0
[F-01] 35°C
A
Water pipe freeze prevention
Only relevant for installations with water piping outdoors. This
function tries to protect outdoor water piping from freezing.
# Code
[9.7] [4-04]
Preferential kWh rate power supply
INFORMATION
The preferential kWh rate power supply contact is
connected to the same terminals (X5M/9+10) as the safety
thermostat. Thus,
preferential kWh rate power supply OR a safety
thermostat.
# Code
[9.8.1] [D-01]
[9.8.2] [D-00]
T
A
8 Configuration
Description
Water pipe freeze prevention:
▪ 0: Intermittent
▪ 1: Continuous
▪ 2: Off
the system can have
Description
Connection to a Benefit kWh power
supply or a Safety thermostat
▪ 0 No: The outdoor unit is connected to
a normal power supply.
▪ 1 Open: The outdoor unit is connected
to a preferential kWh rate power
supply. When the preferential kWh
rate signal is sent by the electricity
company, the contact will open and
the unit will go in forced off mode.
When the signal is released again, the
voltage-free contact will close and the
unit will restart operation. Therefore,
always enable the auto
function.
▪ 2 Closed: The outdoor
connected to a preferential kWh rate
power supply. When the preferential
kWh rate signal is sent by the
electricity company, the contact will
close and the unit will go in forced off
mode. When the signal is released
again, the voltage-free contact will
open and the unit will
operation. Therefore, always enable
the auto restart function.
▪ 3 Safety thermostat: A safety
thermostat is connected to the system
(normal closed contact)
Allow heater: Which heaters are
allowed to operate during preferential
kWh rate power supply?
▪ 0 No: None
▪ 1 Only BSH: Booster heater only
▪ 2 Only BUH: Backup heater only
▪ 3 All: All heaters
See table below.
Setting 2 is only meaningful if the
preferential kWh rate power supply is of
type 1 or indoor unit is connected to a
normal kWh rate power supply (via
X2M/5‑6) and the backup heater is NOT
connected to the preferential kWh rate
power supply.
Installer reference guide
EITHER
restart
unit is
restart
73