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10
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Configuration
10.2.5 Domestic hot water control
Installer reference guide
132
INFORMATION
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. See 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.
T
Target leaving water temperature
t
T
Outdoor temperature
a
Leaving water temperature: Emitter type
Heating up or cooling down the main zone can take longer. This depends on:
▪
The water volume of the system
▪
The heater emitter type of the main zone
The setting Emitter type can compensate for a slow or a quick heating/cooling
system during the heat up/cool down cycle. In room thermostat control, the
emitter type influences the maximum modulation of the desired leaving water
temperature, and the possibility for usage of the automatic cooling/heating
changeover based on the indoor ambient temperature.
It is important to set the emitter type correctly and in accordance with your system
layout. The target delta T for the main zone depends on it.
#
[A.3.1.1.7]
[2-0C]
#
Code
[A.4.1]
[6-0D]
a
b
T a
Code
Emitter type
▪
0: Underfloor heat
▪
1: Fancoil unit
▪
2: Radiator
Domestic hot water Type:
▪
0 (Reheat
allowed.
▪
1 (Reheat
between the scheduled heatup cycles, reheat
operation is allowed.
▪
2 (Scheduled only): The domestic hot water
tank can ONLY be heated according to a
schedule.
Description
Description
only): Only reheat operation is
+
sched.): Same as 2, but
ERLA03D + EHFH03S18D
Daikin Altherma 3 R F
4P596806-1C – 2022.09
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