Daikin ETVH16UE6V7 Installer's Reference Manual page 205

EPRA14~18D + ETVH16SU18+23E
Daikin Altherma 3 H HT F
4P644738-1D – 2023.10
Equilibrium
Activation of the backup heater depends on the following:
1 Is backup heater allowed?
This is defined by [4-00] Backup heater operation.
2 Below which outdoor temperature is backup heater allowed?
This is defined by [5-00] and [5-01] Equilibrium settings. These settings are only
applicable when backup heater operation is allowed ([4-00]=1). The default
value of [5-00] differs between E and E7 models.
3 Is it necessary to activate the backup heater?
This is defined by the backup heater logic. The logic differs between E and E7
models. For E7 models, the system will ONLY activate the backup heater when:
- The compressor is already running at its maximum capacity, and
- The leaving water temperature setpoint is NOT reached, and
- The leaving water temperature does NOT increase fast enough within a fixed
timeframe. The fixed timeframe is 3 minutes by default, but is automatically
tuned to your system when performing a space heating test run (see
"11.4.3 Operation test
the system.
# Code
[9.3.6] [5-00]
[9.3.7] [5-01]
INFORMATION
Applicable if [5‑00]=1:
Above 10°C ambient temperature, the heat pump will operate until 65°C. Configuring
a higher setpoint with an ambient temperature that is higher than the set
equilibrium temperature will prevent the backup heater from assisting. The backup
heater will ONLY assist if you increase the equilibrium temperature [5‑01] to the
required ambient temperature you need to reach the higher setpoint.
Operation
# Code
[9.3.8] [4‑00]
4
run" [ 236]), depending on the actual water volume of
Equilibrium: Deactivate backup heater (or
external backup heat source in case of a bivalent
system) above the equilibrium temperature for
space heating?
▪ 0: No (default for E7 models; no need to change
but possible)
▪ 1: Yes (default for E models)
Equilibrium temperature: Outdoor
temperature below which operation of the
backup heater (or external backup heat source in
case of a bivalent system) is allowed.
Range: –15°C~35°C
Backup heater operation:
▪ 0: Restricted
▪ 1: Allowed
▪ 2: Only DHW: Backup heater operation is
enabled for domestic hot water and disabled
for space heating.
10 Configuration
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Description
Description
Installer reference guide
205