Daikin CHYHBH05AA Installer's Reference Manual page 59

# Code
[A.4.4.1] [2‑01] Disinfection
▪ 0: No (default)
▪ 1: Yes
[A.4.4.3] [2‑02] Start time: 00~23:00, step: 1:00 (default:
23:00).
[A.4.4.4] [2‑03] Temperature target: fixed value (default:
60°C)
[A.4.4.5] [2‑04] Duration
Range 40~60 minutes (default: 40
minutes)
T
DHW
[2-03]
T
H
T
U
00.00 01.00 22.00
T Domestic hot water temperature
DHW
T User set point temperature
U
T High set point temperature [2-03]
H
t Time
WARNING
Be aware that the domestic hot water temperature at the
hot water tap will be equal to the value selected in field
setting [2-03] after a disinfection operation.
When the high domestic hot water temperature can be a
potential risk for human injuries, a mixing valve (field
supply) shall be installed at the hot water outlet connection
of the domestic hot water tank. This mixing valve shall
secure that the hot water temperature at the hot water tap
never rise above a set maximum value. This maximum
allowable hot water temperature shall be selected
according to the applicable legislation.
CAUTION
Be sure that the disinfection function start time [A.4.4.3]
with defined duration [A.4.4.5] is NOT interrupted by
possible domestic hot water demand.
INFORMATION
In case of error code AH and no interruption of the
disinfection function occurred due to domestic hot water
tapping, following actions are recommended:
▪ When the Domestic hot water > Type > Reheat or
Reheat + sched. is selected, it is recommended to
program the start-up of the disinfection function at least
4 hours later than the last expected large hot water
tapping. This start-up can be set by installer settings
(disinfection function).
▪ When the Domestic hot water > Type > Scheduled only
is selected, it is recommended to program a Storage
eco 3 hours before the scheduled start-up of the
disinfection function to preheat the tank.
INFORMATION
Disinfection function is restarted in case the domestic hot
water temperature drops 5°C below the disinfection target
temperature within the duration time.
CHYHBH05+08AA + EHYKOMB33A
Daikin hybrid for multi heat pump – heat pump module
4P471761-1A – 2017.10
Description
[2-04]
23.00 24.00 t
[2-02]
INFORMATION
An AH error occurs if you do the following during
disinfection:
▪ Set the user permission level to Installer.
▪ Go to the DHW tank temperature home page (Tank).
▪ Press to interrupt the disinfection.
Heat source settings
Auto emergency
When the heat pump fails to operate, the gas boiler can serve as an
emergency back-up heater and either automatically or non-
automatically take over the entire heat load.
▪ When auto emergency is set to Automatic and a heat pump failure
occurs, the boiler will automatically take over the heat load.
▪ When auto emergency is set to Manual and a heat pump failure
occurs, the domestic hot water and space heating operations will
stop and need to be recovered manually. The user interface will
then ask the user to confirm whether the boiler can take over the
entire heat load or not.
When the heat pump fails, will appear on the user interface. If the
house is unattended for longer periods, we recommend to set
[A.6.C] Emergency to Automatic.
# Code
[A.6.C] N/A Emergency:
▪ 0: Manual (default)
▪ 1: Automatic
INFORMATION
The auto emergency setting can be set in the menu
structure of the user interface only.
INFORMATION
If a heat pump failure occurs and [A.6.C] is set to Manual,
the room frost protection function, the underfloor heating
screed dryout function, and the water pipe antifreeze
function will remain active even if the user does NOT
confirm emergency operation.
Equilibrium temperature
Based on the ambient temperature, energy prices and the required
leaving water temperature, the user interface is able to calculate
which heat source can deliver the required heating capacity most
efficiently. However, to maximise the energy output of the heat
pump, it is possible to prevent the gas boiler from operating when
the ambient temperature exceeds a certain point (e.g. 5°C). This can
be useful to avoid too much gas boiler operation in case of incorrect
settings. When an equilibrium temperature is set, domestic hot water
operation is NEVER prohibited.
# Code
N/A [5‑00] Defines if gas boiler operation is allowed
when the ambient temperature exceeds
the set equilibrium temperature during
space heating operation.
▪ 0: allowed (default).
▪ 1: NOT allowed.
N/A [5‑01] Equilibrium temp.
When the ambient temperature is higher
than this temperature, the gas boiler is
NOT allowed to work. Only applicable if
[5‑00] is set to 1.
Range –15°C~35°C (default: 5°C)
8 Configuration
Description
Description
Installer reference guide
59