Rotex RHBH04CB, Operation Manual

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4 Energy saving tips
Operation manual
8
RHBH/X04~16CB
ROTEX HPSU low temperature Bi‑bloc
4P384967-1B – 2017.04
3.8 Installer settings: Tables to be
filled in by installer
3.8.1 Quick wizard
Setting Default Fill in…
Backup heater configuration (only for unified backup heater)
[A.2.1.5]
BUH type 1 (1P,(1/2))
Forced off contact [A.2.1.6]
Forced off contact 0 (No)
Space heating/cooling settings [A.2.1]
Unit control method 2 (RT control)
User interface location 1 (In room)
Number of LWT zones 1 (1 LWT zone)
Pump operation mode 1 (Sample)
Domestic hot water settings [A.2.2]
DHW operation Depends on
model
DHW tank type Depends on
model
DHW pump 0 (No)
Thermostats [A.2.2]
Contact type main 2 (Thermo ON/
OFF)
Contact type add. 2 (Thermo ON/
OFF)
External sensor 0 (No)
Digital I/O PCB [A.2.2.6]
Ext. backup heat src 0 (No)
Solar kit 0 (No)
Alarm output 0 (Normally open)
Bottom plate heater 0 (No)
Demand PCB [A.2.2.7]
Demand PCB 0 (No)
Energy metering [A.2.2]
External kWh meter 1 0 (No)
External kWh meter 2 0 (No)
Capacities (energy metering) [A.2.3]
Booster heater 0 kW
BUH: step 1 Depends on
model
BUH: step 2 Depends on
model
Bottom plate heater 0 W
3.8.2 Space heating/cooling control
Setting Default Fill in…
Leaving water temperature: Main zone [A.3.1.1]
LWT setpoint mode 1 (WD)
Leaving water temperature: Additional zone [A.3.1.2]
LWT setpoint mode 1 (WD)
Leaving water temperature: Delta T source [A.3.1.3]
Heating 5°C
Cooling 5°C
Leaving water temperature: Modulation [A.3.1.1.5]
Modulated LWT 0 (No)
Setting Default Fill in…
Leaving water temperature: Emitter type [A.3.1.1.7]
Emitter type 1 (Slow)
3.8.3 Domestic hot water control [A.4]
Setting Default Fill in…
Type 2 (Scheduled
only)
Maximum setpoint Depends on
model
INFORMATION
There is a risk of space heating (cooling) capacity
shortage/comfort problem (in case of frequent domestic hot
water operation, frequent and long space heating/cooling
interruption will happen) when selecting [6‑0D]=0 ([A.4.1]
Domestic hot water Type=Reheat only) in case of a
domestic hot water tank without an internal booster heater.
INFORMATION
When the DHW tank booster mode is active, the risk of
space heating/cooling and capacity shortage comfort
problems is significant. In case of frequent domestic hot
water operation, frequent and long space heating/cooling
interruptions will happen.
3.8.4 Contact/helpdesk number [6.3.2]
Setting Default Fill in…
Contact/helpdesk number —
4 Energy saving tips
Tips about room temperature
▪ Make sure the desired room temperature is NEVER too high (in
heating mode) or too low (in cooling mode), but ALWAYS
according to your actual needs. Each saved degree can save up
to 6% of heating/cooling costs.
▪ Do NOT increase the desired room temperature to speed up
space heating. The space will NOT heat up faster.
▪ When your system layout contains slow heat emitters (example:
under floor heating), avoid large fluctuation of the desired room
temperature and do NOT let the room temperature drop too low. It
will take more time and energy to heat up the room again.
▪ Use a weekly schedule for your normal space heating or cooling
needs. If necessary, you can easily deviate from the schedule:
▪ For shorter periods: You can overrule the scheduled room
temperature. Example: When you have a party, or when you
are leaving for a couple of hours.
▪ For longer periods: You can use the holiday mode. Example:
When you stay at home during your holiday, or when you go
away during your holiday.
Tips about DHW tank temperature
▪ Use a weekly schedule for your normal domestic hot water needs
(only in scheduled mode).
▪ Program to heat up the DHW tank to a preset value (Storage
comfort = higher DHW tank temperature) during the night,
because then space heating demand is lower.
▪ If heating up the DHW tank once at night is not sufficient,
program to additionally heat up the DHW tank to a preset value
(Storage eco = lower DHW tank temperature) during the day.