Daikin EGSQH10S18AA9W Installer's Reference Manual page 42

8 Configuration
# Code
[7.7.2.1] [0-00] << continuation
[0-01] ▪ [0-03]:
temperature. –40°C~+5°C (default: –
[0-02]
20°C)
[0-03]
▪ [0-02]:
temperature.
15°C)
▪ [0-01]:
temperature
temperature equals or drops below
the low ambient temperature.
Range: [9‑05]°C~[9‑06]°C (default:
60°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 high ambient temperature.
Range: [9‑05]°C~min(45, [9‑06])°C
(default: 25°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
Temperature difference for entering and leaving water. The unit is
designed to support under floor loops operation. The recommended
leaving water temperature (set by the user interface) for under floor
loops is 35°C. In such case, the unit will be controlled to realize a
temperature difference of 5°C which means that the entering water
to the unit is around 30°C. Depending on the installed application
(radiators, heat pump convector, under floor loops) or situation, it
can be possible to change the difference between entering and
leaving water temperature. Note that the pump will regulate its flow
to keep the Δt.
# 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: 8°C).
Specific for installations that require higher water temperatures (e.g.,
radiators)
For leaving water temperature set point>55°C
As soon as the leaving water temperature set point is >55°C, Δt is
no longer a constant determined by field setting [9‑09] (default 8°C),
but linear in function of the set point.
°C
14
4
55 65
Δt Temperature difference
T Target leaving water temperature (main)
t
For leaving water temperature set point>60°C
Installer reference guide
42
Description
Low outdoor ambient
High outdoor ambient
10°C~25°C (default:
Desired leaving water
when the outdoor
warmer water
Desired leaving water
when the outdoor
Description
Δt
T
t
Up to leaving water temperature set point 60°C, the heat pump can
cover this temperature. If you need a leaving water temperature
set points >60°C, the backup heater will assist to reach the
requested temperature. Assistance by backup heater is ONLY
possible when the ambient temperature is lower than the equilibrium
temperature.
T t b
a
≤65
≤60
a Water from heat emitters
is
b Condenser
c Leaving water from condenser
d Backup heater
e Leaving water
f Water flow
1 By heat pump
2 By backup heater
3 Temperature difference
T Target leaving water temperature (main)
t
To minimize the power consumption, the heat pump ALWAYS tries
to reach max possible target leaving water temperature of 60°C. The
remaining part is done by the backup heater.
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)
# Code
[A.3.1.1.5] [8-05]
d
c e
f
2
3
1
exactly matching the
Description
Modulated LWT:
▪ 0 (No) (default): disabled.
Note: The desired leaving water
temperature needs to be set on the
user interface.
▪ 1 (Yes): enabled. The leaving water
temperature is calculated according
to the difference between the desired
and the actual room temperature.
This creates a better match between
the capacity of the heat pump and
the actual required capacity, and
results in less start/stop cycles and a
more economic operation.
Note: The desired leaving water
temperature can only be read out on
the user interface
EGSQH10S18AA9W
Daikin Altherma ground source heat pump
4P351748-1D – 2016.02
desired