Domestic Hot Water Control - Daikin Altherma ERLQ004-006-008CA Reference Manual

8 Configuration
# Code
[7.7.2.1] [0-00] << continuation
[0-01] ▪ [0-03]:
temperature. –40°C~+5°C (default: –
[0-02]
10°C)
[0-03]
▪ [0-02]:
temperature.
15°C)
▪ [0-01]:
temperature
temperature equals or drops below
the
[9‑05]~[9‑06] (default: 45°C).
Note: This value should be higher
than [0-00] as for low outdoor
temperatures
required.
▪ [0-00]:
temperature
temperature equals or rises above
the
[9‑05]~min(45,
35°C).
Note: This value should be lower
than [0-01] as for high outdoor
temperatures less warm water is
required.
Leaving water temperature: Delta T source
When both temperature zones have heating demand, both pumps
will operate at full speed. When only 1 temperature zone has heating
demand, only 1 pump will operate and the flow will be controlled to
realize a temperature difference between the entering and the
leaving water of [9‑09] on that zone. Only 1 temperature difference
[9‑09] can be selected, this is then applicable for both temperature
zones.
# Code
[A.3.1.3.1] [9-09] Heating: Required temperature
difference between entering and
leaving water. Range: 3°C~10°C (in
steps of 1°C; default value: 5°C).
Leaving water temperature: Modulation
Only applicable in case of room thermostat control. When using the
room thermostat functionality, the customer needs to set the desired
room temperature. The unit will supply hot water to the heat emitters
and the room will be heated. Additionally, also the desired leaving
water temperature must be configured: when turning on the
modulation, the desired leaving water temperature will be calculated
automatically by the unit (based on the preset temperatures, if
weather-dependent is selected, modulation will be done based on
the desired weather-dependent temperatures); when turning off the
modulation, you can set the desired leaving water temperature on
the user interface. Moreover, with the modulation turned on, the
desired leaving water temperature is lowered or raised in function of
the desired room temperature and the difference between the actual
and the desired room temperature. This results in:
▪ stable room temperatures
temperature (higher comfort level)
▪ less On/OFF cycles (lower noise level, higher comfort and higher
efficiency)
▪ water temperatures as low as possible to match the desired
temperature (higher efficiency)
Installer reference guide
46
Description
Low outdoor ambient
High outdoor ambient
10°C~25°C (default:
Desired leaving water
when the outdoor
low ambient temperature.
warmer water
Desired leaving water
when the outdoor
high ambient temperature.
[9‑06])°C (default:
Description
exactly matching the desired
# Code
[A.3.1.1.5] [8-05]
INFORMATION
Only applicable for the main zone.
INFORMATION
is
When leaving water temperature modulation is enabled,
the weather‑dependent curve needs to be set to a higher
position than [8-06] plus the minimum leaving water
temperature setpoint required to reach a stable condition
on the comfort setpoint for the room. To increase
efficiency, modulation can lower the leaving water setpoint.
By setting the weather‑dependent curve to a higher
position, it cannot drop below the minimum setpoint. Refer
to the illustration below.
T t
+[8-06]
−[8-06]
a Weather-dependent curve
b Minimum leaving water temperature setpoint required to
reach a stable condition on the comfort setpoint for the
room.
Leaving water temperature: Emitter type
This setting only applies to the main zone. Only applicable in case of
room thermostat control. Depending on the system water volume
and the heat emitters type, the heat up of a space can take longer.
This setting can compensate for a slow or a quick heating system
during the heat up cycle.
Note: The setting of the emitter type will influence the maximum
modulation of the desired leaving water temperature.
Therefore it is important to set this correctly.
# Code
[A.3.1.1.7] [9-0B]
8.2.6

Domestic hot water control

Configuring the desired tank temperature
The domestic hot water can be prepared in 3 different ways. They
differ from each other by the way the desired tank temperature is set
and how the unit acts upon it.
Description
Modulated LWT:
▪ No (default): disabled.
Note: The desired leaving water
temperature needs to be set on the
user interface.
▪ Yes: enabled.
Note: The desired leaving water
temperature can only be read out on
the user interface
a
b
T a
Description
Emitter type:
Set for the main temperature zone.
Reaction time of the system:
▪ Quick Example: Small water volume
and fan coils.
▪ Slow Example: Large water volume,
floor heating loops.
ERLQ004~008CA + EHVZ04+08S18CB
Daikin Altherma – Low temperature split
4P401676-1 – 2015.02